Previous
Aim:
Foodborne non-typhoidal Salmonella (NTS) infections are a major global health issue, frequently linked to animal source foods. However, there is limited data on NTS prevalence, distribution, and serotype diversity in common animal products and related food in Ghana. This study investigated the prevalence and serotype diversity of NTS in animal source foods, ready-to-eat (RTE) food, and animal fecal samples across six districts in the Greater Accra Region of Ghana.
Methods:
A total of 696 samples were randomly collected from selected markets across the districts. These included unprocessed animal products: beef (16), chicken (21), eggs (185), and raw cow milk (40). Additionally, 50 samples of RTE street foods and 36 samples of locally produced soft cheese (“wagashie”) were obtained from vendors. Fecal samples consisted of chicken droppings (70) and pig feces (138), which were purposively collected from 11 poultry farms and two pig slaughter facilities in the region. Furthermore, 140 pork samples were purposively collected from the slaughter facilities. Standard microbiological methods, including pre-enrichment, selective enrichment, and plating on selective media, were used for Salmonella species isolation, with identification confirmed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Serotyping followed the White-Kauffman Le-Minor classification scheme.
Results:
Overall, 26 Salmonella isolates were recovered (3.7%). Prevalence was significantly higher in animal source foods (5.71%; 25/438) compared to fecal samples (0.4%; 1/208) (p = 0.0026). Salmonella contamination was highest in raw pork (13.6%), followed by “wagashie” (5.5%) and raw milk (5%). Nine distinct serotypes were identified. Among them, Salmonella Typhimurium was the most prevalent, accounting for 40.9%, followed by Salmonella Kaapstad at 13.6%. Additionally, pork samples contained seven of these serotypes.
Conclusions:
These findings highlight a potential risk posed by NTS in commonly consumed animal source foods in Greater Accra and emphasize the need for targeted interventions to control contamination, particularly in pork products.
Aim:
Foodborne non-typhoidal Salmonella (NTS) infections are a major global health issue, frequently linked to animal source foods. However, there is limited data on NTS prevalence, distribution, and serotype diversity in common animal products and related food in Ghana. This study investigated the prevalence and serotype diversity of NTS in animal source foods, ready-to-eat (RTE) food, and animal fecal samples across six districts in the Greater Accra Region of Ghana.
Methods:
A total of 696 samples were randomly collected from selected markets across the districts. These included unprocessed animal products: beef (16), chicken (21), eggs (185), and raw cow milk (40). Additionally, 50 samples of RTE street foods and 36 samples of locally produced soft cheese (“wagashie”) were obtained from vendors. Fecal samples consisted of chicken droppings (70) and pig feces (138), which were purposively collected from 11 poultry farms and two pig slaughter facilities in the region. Furthermore, 140 pork samples were purposively collected from the slaughter facilities. Standard microbiological methods, including pre-enrichment, selective enrichment, and plating on selective media, were used for Salmonella species isolation, with identification confirmed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Serotyping followed the White-Kauffman Le-Minor classification scheme.
Results:
Overall, 26 Salmonella isolates were recovered (3.7%). Prevalence was significantly higher in animal source foods (5.71%; 25/438) compared to fecal samples (0.4%; 1/208) (p = 0.0026). Salmonella contamination was highest in raw pork (13.6%), followed by “wagashie” (5.5%) and raw milk (5%). Nine distinct serotypes were identified. Among them, Salmonella Typhimurium was the most prevalent, accounting for 40.9%, followed by Salmonella Kaapstad at 13.6%. Additionally, pork samples contained seven of these serotypes.
Conclusions:
These findings highlight a potential risk posed by NTS in commonly consumed animal source foods in Greater Accra and emphasize the need for targeted interventions to control contamination, particularly in pork products.
DOI: https://doi.org/10.37349/eff.2025.1010105
Aim:
This study investigated the impact of storage temperature over a 12-week period on the quality of dairy and non-dairy frozen desserts produced at a university micro-creamery. Standardized production methods were employed to minimize variability. The primary objective was to assess whether increasing frozen storage temperatures—a potential strategy for reducing energy consumption—would adversely affect product quality.
Methods:
Changes in ice crystal size were evaluated using scanning electron microscopy (SEM) on freeze-dried samples. A trained sensory panel assessed texture coarseness (grittiness) using a 5-point scale (1 = smoothest, 5 = grittiest). Weight loss was measured by comparing the sample mass before and after storage. Products were stored at four temperatures: –28.9°C (control), –17.8°C, –15.0°C, and –12.2°C, with evaluations conducted at 0, 4, 8, and 12 weeks. Statistical analysis was performed using a significance level of α = 0.05.
Results:
Higher storage temperatures resulted in increased ice crystal size and greater perceived grittiness. Non-dairy desserts, which contained slightly more fat, demonstrated greater resistance to ice crystal growth and texture degradation. Desserts stored at –12.2°C and –15.0°C exhibited significantly larger ice crystals and coarser textures after 8 weeks compared to those stored at –17.8°C and –28.9°C.
Conclusions:
The results indicate that storage at –15.0°C may be a feasible energy-saving option for commercial frozen dessert storage, provided the product is consumed within four weeks. However, storage at –12.2°C led to significant quality loss, suggesting that product reformulation may be necessary at this temperature. Further research should explore the role of various plant-based fats compared to milkfat in mitigating ice and fat crystal growth and preserving texture in frozen desserts.
Aim:
This study investigated the impact of storage temperature over a 12-week period on the quality of dairy and non-dairy frozen desserts produced at a university micro-creamery. Standardized production methods were employed to minimize variability. The primary objective was to assess whether increasing frozen storage temperatures—a potential strategy for reducing energy consumption—would adversely affect product quality.
Methods:
Changes in ice crystal size were evaluated using scanning electron microscopy (SEM) on freeze-dried samples. A trained sensory panel assessed texture coarseness (grittiness) using a 5-point scale (1 = smoothest, 5 = grittiest). Weight loss was measured by comparing the sample mass before and after storage. Products were stored at four temperatures: –28.9°C (control), –17.8°C, –15.0°C, and –12.2°C, with evaluations conducted at 0, 4, 8, and 12 weeks. Statistical analysis was performed using a significance level of α = 0.05.
Results:
Higher storage temperatures resulted in increased ice crystal size and greater perceived grittiness. Non-dairy desserts, which contained slightly more fat, demonstrated greater resistance to ice crystal growth and texture degradation. Desserts stored at –12.2°C and –15.0°C exhibited significantly larger ice crystals and coarser textures after 8 weeks compared to those stored at –17.8°C and –28.9°C.
Conclusions:
The results indicate that storage at –15.0°C may be a feasible energy-saving option for commercial frozen dessert storage, provided the product is consumed within four weeks. However, storage at –12.2°C led to significant quality loss, suggesting that product reformulation may be necessary at this temperature. Further research should explore the role of various plant-based fats compared to milkfat in mitigating ice and fat crystal growth and preserving texture in frozen desserts.
DOI: https://doi.org/10.37349/eff.2025.1010104
Aim:
This study examined the influence of coffee parchment (CP) particle size on growth, yield, morphology, and color quality of Pleurotus ostreatus and Pleurotus citrinopileatus, aiming to optimize the valorization of agro-industrial coffee waste through mushroom cultivation.
Methods:
Three CP particle size classes, raw CP (RCP), medium CP (MCP), and fine CP (FCP), were prepared and tested as substrates under controlled conditions. Growth traits (spawn running, primordial initiation, fruiting time), morphological parameters (pileus number, diameter, stipe length), yield indices [total yield, biological efficiency (BE), and production rate (PR)], and cap color (L*, a*, b*) were assessed. Data were analyzed using ANOVA and Duncan’s test at p < 0.05.
Results:
Particle size significantly affected all parameters. MCP and FCP accelerated colonization and primordia initiation by up to 7–8 days compared with RCP. Mushrooms cultivated in the FCP achieved the highest yields (377.2 ± 18.5 g for P. ostreatus; 355.0 ± 17.0 g for P. citrinopileatus), BE (75.2% and 72.0%), and PR (156.7% and 150.5%). Morphological traits were also improved, with larger and more abundant fruiting bodies on MCP and FCP. Color analysis indicated darker caps and a higher red hue on MCP substrates, suggesting enhanced pigment biosynthesis. Overall, P. ostreatus outperformed P. citrinopileatus, though both species responded positively to substrate refinement.
Conclusions:
CP particle size is a critical determinant of Pleurotus cultivation performance. Finer substrates improved yield, efficiency, and crop earliness, while enhancing commercial quality. These findings demonstrate the potential of physical substrate engineering to promote circular bioeconomy strategies and valorize lignocellulosic residues in coffee-producing regions.
Aim:
This study examined the influence of coffee parchment (CP) particle size on growth, yield, morphology, and color quality of Pleurotus ostreatus and Pleurotus citrinopileatus, aiming to optimize the valorization of agro-industrial coffee waste through mushroom cultivation.
Methods:
Three CP particle size classes, raw CP (RCP), medium CP (MCP), and fine CP (FCP), were prepared and tested as substrates under controlled conditions. Growth traits (spawn running, primordial initiation, fruiting time), morphological parameters (pileus number, diameter, stipe length), yield indices [total yield, biological efficiency (BE), and production rate (PR)], and cap color (L*, a*, b*) were assessed. Data were analyzed using ANOVA and Duncan’s test at p < 0.05.
Results:
Particle size significantly affected all parameters. MCP and FCP accelerated colonization and primordia initiation by up to 7–8 days compared with RCP. Mushrooms cultivated in the FCP achieved the highest yields (377.2 ± 18.5 g for P. ostreatus; 355.0 ± 17.0 g for P. citrinopileatus), BE (75.2% and 72.0%), and PR (156.7% and 150.5%). Morphological traits were also improved, with larger and more abundant fruiting bodies on MCP and FCP. Color analysis indicated darker caps and a higher red hue on MCP substrates, suggesting enhanced pigment biosynthesis. Overall, P. ostreatus outperformed P. citrinopileatus, though both species responded positively to substrate refinement.
Conclusions:
CP particle size is a critical determinant of Pleurotus cultivation performance. Finer substrates improved yield, efficiency, and crop earliness, while enhancing commercial quality. These findings demonstrate the potential of physical substrate engineering to promote circular bioeconomy strategies and valorize lignocellulosic residues in coffee-producing regions.
DOI: https://doi.org/10.37349/eff.2025.1010103
Aim:
Brosimum alicastrum Sw. (Ramón) seed is an underutilized starch source. Ramón seed starch (RSS) has been partially characterized, showing functional properties superior to corn starch. The modification of native starches is useful for obtaining desirable characteristics. HMT is a physical method that may alter the structure of starch by modifying its interaction with water. The study evaluated the effect of HMT on the chemical composition, morphological characteristics, and functional properties of RSS.
Methods:
RSS, corn, and wheat starches were isolated using a wet milling method. The starches were modified with HMT (10%, 20%, and 30% moisture). Chemical composition of flours and native starches was determined using AOAC methods. Total starch was determined by the AACC method, and amylose content was analyzed using the assay with DMSO, Concanavalin A, and amylolytic hydrolysis. Morphological characteristics were observed using scanning electron microscopy. Functional properties [solubility index (SI), water absorption capacity (WAC), and swelling power (SP)] of starches were determined using gravimetric methods.
Results:
RSS had higher mineral content (0.9%), total carbohydrates (98.5%), dietary fiber (11.2%), and lower protein content (0.2%) and total starch (82.0%) than wheat and corn starches. RSS yield was 31.2% and showed small granules (6.3 ± 1.4–11.5 ± 1.3 µm), with oval-spherical shape, and typical amylose content (24.9 ± 0.4%). No significant changes were observed in amylose-amylopectin content and morphology of granules after modification. The functional properties of RSS were significantly improved in HMT10%, reducing the peak at 80°C and increasing the SI (18.7 ± 0.8%), WAC (18.1 ± 0.2 g water/g starch), and SP (22.2 ± 0.2 g water/g starch) at 90°C, compared to native RSS, and greater than modified wheat and corn starches.
Conclusions:
RSS modified by HMT at 10% moisture gradually enhances its functional properties as temperature increases, and above that of corn and wheat starches, resulting in an attractive non-conventional starch with potential industry applications.
Aim:
Brosimum alicastrum Sw. (Ramón) seed is an underutilized starch source. Ramón seed starch (RSS) has been partially characterized, showing functional properties superior to corn starch. The modification of native starches is useful for obtaining desirable characteristics. HMT is a physical method that may alter the structure of starch by modifying its interaction with water. The study evaluated the effect of HMT on the chemical composition, morphological characteristics, and functional properties of RSS.
Methods:
RSS, corn, and wheat starches were isolated using a wet milling method. The starches were modified with HMT (10%, 20%, and 30% moisture). Chemical composition of flours and native starches was determined using AOAC methods. Total starch was determined by the AACC method, and amylose content was analyzed using the assay with DMSO, Concanavalin A, and amylolytic hydrolysis. Morphological characteristics were observed using scanning electron microscopy. Functional properties [solubility index (SI), water absorption capacity (WAC), and swelling power (SP)] of starches were determined using gravimetric methods.
Results:
RSS had higher mineral content (0.9%), total carbohydrates (98.5%), dietary fiber (11.2%), and lower protein content (0.2%) and total starch (82.0%) than wheat and corn starches. RSS yield was 31.2% and showed small granules (6.3 ± 1.4–11.5 ± 1.3 µm), with oval-spherical shape, and typical amylose content (24.9 ± 0.4%). No significant changes were observed in amylose-amylopectin content and morphology of granules after modification. The functional properties of RSS were significantly improved in HMT10%, reducing the peak at 80°C and increasing the SI (18.7 ± 0.8%), WAC (18.1 ± 0.2 g water/g starch), and SP (22.2 ± 0.2 g water/g starch) at 90°C, compared to native RSS, and greater than modified wheat and corn starches.
Conclusions:
RSS modified by HMT at 10% moisture gradually enhances its functional properties as temperature increases, and above that of corn and wheat starches, resulting in an attractive non-conventional starch with potential industry applications.
DOI: https://doi.org/10.37349/eff.2025.1010102
This article belongs to the special issue Organic and Inorganic Compounds in Foods and Plants from Latin America
Aim:
This study aimed to assess the viability of Lacticaseibacillus rhamnosus GR-1 in four yogurt formulations with or without flax, chia, and hemp seeds during multiple time points across fermentation and cold storage. Additionally, the study evaluated consumer acceptance of the seed-fortified yogurts based on ratings of appearance, flavour, texture, and overall acceptability.
Methods:
Four yogurt samples were inoculated with the probiotic strain L. rhamnosus GR-1 and fermented for up to 6 h at 38°C, followed by refrigerated storage at 4°C for up to 30 days, respectively. Microbial enumeration was performed throughout fermentation and storage to assess the viability of L. rhamnosus GR-1. 84 participants engaged in a sensory evaluation where the consumer acceptability of the yogurt samples was evaluated.
Results:
Microbial analysis showed consistent viable counts of L. rhamnosus GR-1 across all fermentation and storage time points, where the sample containing chia seeds maintained the highest levels of probiotic viability. pH significantly decreased (p < 0.05) during fermentation in all treatments, with further reductions during storage only in the flax, hemp, and chia samples. Sensory evaluation revealed that the control scored highest in appearance, flavour, texture, and overall acceptability (p < 0.001). While participants showed the highest preference for the control sample, 77% indicated they would consider purchasing probiotic yogurt.
Conclusions:
Overall, adding flax, hemp, and chia seeds supports the viability of L. rhamnosus GR-1 in probiotic yogurt. Seed mucilage may play a vital role in the growth and viability of probiotics in yogurt products. The findings from this research provide a valuable foundation for the development of more nutrient-dense and consumer-friendly probiotic yogurt products.
Aim:
This study aimed to assess the viability of Lacticaseibacillus rhamnosus GR-1 in four yogurt formulations with or without flax, chia, and hemp seeds during multiple time points across fermentation and cold storage. Additionally, the study evaluated consumer acceptance of the seed-fortified yogurts based on ratings of appearance, flavour, texture, and overall acceptability.
Methods:
Four yogurt samples were inoculated with the probiotic strain L. rhamnosus GR-1 and fermented for up to 6 h at 38°C, followed by refrigerated storage at 4°C for up to 30 days, respectively. Microbial enumeration was performed throughout fermentation and storage to assess the viability of L. rhamnosus GR-1. 84 participants engaged in a sensory evaluation where the consumer acceptability of the yogurt samples was evaluated.
Results:
Microbial analysis showed consistent viable counts of L. rhamnosus GR-1 across all fermentation and storage time points, where the sample containing chia seeds maintained the highest levels of probiotic viability. pH significantly decreased (p < 0.05) during fermentation in all treatments, with further reductions during storage only in the flax, hemp, and chia samples. Sensory evaluation revealed that the control scored highest in appearance, flavour, texture, and overall acceptability (p < 0.001). While participants showed the highest preference for the control sample, 77% indicated they would consider purchasing probiotic yogurt.
Conclusions:
Overall, adding flax, hemp, and chia seeds supports the viability of L. rhamnosus GR-1 in probiotic yogurt. Seed mucilage may play a vital role in the growth and viability of probiotics in yogurt products. The findings from this research provide a valuable foundation for the development of more nutrient-dense and consumer-friendly probiotic yogurt products.
DOI: https://doi.org/10.37349/eff.2025.1010101
Aim:
Colombia’s economy relies heavily on agriculture, with Hass avocado (Persea americana) playing a key role. This fruit consists of exocarp, mesocarp, and endocarp, with the mesocarp being the most consumed part due to its rich composition of saturated and unsaturated fatty acids (omegas), which offer valuable nutritional properties. This study analyzed the lipid composition of Hass avocado from the northern subregion of the Caldas department and evaluated the variability in lipid content across cultivation zones based on metabolite profiles.
Methods:
Lipids were extracted from avocado samples, derivatized, and analyzed using gas chromatography-mass spectrometry (GC-MS) for lipidome characterization. Statistical analyses determined fat content variability across zones, and metabolic pathways involved in lipid biosynthesis were explored.
Results:
Fat content ranged from 10.27% to 59.04%, with significant differences observed between cultivation zones (ANOVA: p = 0.0102 for Aranzazu Business 1; p = 0.03918 for Salamina Business 1). GC-MS analysis identified 143 chromatographic signals, including 60 known metabolites, with major fatty acids such as myristic, palmitic, tridecanoic, palmitoleic (omega-7), and oleic (omega-9) acids. The identified functional groups comprised 28.3% alkanes, 21.7% aldehydes, 18.3% esters (derivatives of the derivatization process), and 11.7% alcohols. The observed regional lipid variability suggests that environmental and agronomic factors modulate fatty acid biosynthesis, potentially through adjustments in pathways such as the mevalonate route.
Conclusions:
This lipidomic approximation confirms the presence of bioactive omega-7 and omega-9 fatty acids, reinforcing the nutritional significance of Hass avocado and highlighting its potential cardiovascular benefits. The demonstrated variability across cultivation zones emphasizes the influence of local environmental conditions on lipid profiles. These findings contribute to the understanding of avocado lipid metabolism and provide valuable insights for optimizing cultivation practices, improving fruit quality, and informing functional food development.
Aim:
Colombia’s economy relies heavily on agriculture, with Hass avocado (Persea americana) playing a key role. This fruit consists of exocarp, mesocarp, and endocarp, with the mesocarp being the most consumed part due to its rich composition of saturated and unsaturated fatty acids (omegas), which offer valuable nutritional properties. This study analyzed the lipid composition of Hass avocado from the northern subregion of the Caldas department and evaluated the variability in lipid content across cultivation zones based on metabolite profiles.
Methods:
Lipids were extracted from avocado samples, derivatized, and analyzed using gas chromatography-mass spectrometry (GC-MS) for lipidome characterization. Statistical analyses determined fat content variability across zones, and metabolic pathways involved in lipid biosynthesis were explored.
Results:
Fat content ranged from 10.27% to 59.04%, with significant differences observed between cultivation zones (ANOVA: p = 0.0102 for Aranzazu Business 1; p = 0.03918 for Salamina Business 1). GC-MS analysis identified 143 chromatographic signals, including 60 known metabolites, with major fatty acids such as myristic, palmitic, tridecanoic, palmitoleic (omega-7), and oleic (omega-9) acids. The identified functional groups comprised 28.3% alkanes, 21.7% aldehydes, 18.3% esters (derivatives of the derivatization process), and 11.7% alcohols. The observed regional lipid variability suggests that environmental and agronomic factors modulate fatty acid biosynthesis, potentially through adjustments in pathways such as the mevalonate route.
Conclusions:
This lipidomic approximation confirms the presence of bioactive omega-7 and omega-9 fatty acids, reinforcing the nutritional significance of Hass avocado and highlighting its potential cardiovascular benefits. The demonstrated variability across cultivation zones emphasizes the influence of local environmental conditions on lipid profiles. These findings contribute to the understanding of avocado lipid metabolism and provide valuable insights for optimizing cultivation practices, improving fruit quality, and informing functional food development.
DOI: https://doi.org/10.37349/eff.2025.1010100
The health benefits of milk have been acknowledged throughout human history, with scientific research over the past 50 years elucidating its nutritional composition and functional benefits. This article presents a contemporary analysis of modern casein chemistry, emphasizing the specialized engineering of dairy proteins for optimizing resource utilization. It explores the unique structure of casein micelles as supramolecular complexes, where ionic interactions promote electron sharing between phosphoserines and calcium phosphate nanoclusters. This review aims to synthesize recent literature on casein nanocomplexes and explore their potential in industrial applications such as drug delivery and sustainable food engineering. Casein-based bio-nanocomposites have emerged as a significant research interest in food science, offering considerable potential for a wide array of scientific applications, such as drug formulation and nutraceutical delivery. It is crucial for scientists to engage in ongoing research and development efforts to encourage sustainable progress, enhance commercial viability, improve manufacturing processes, and expand the engineering applications of casein micelles toward fostering an eco-friendly industry.
The health benefits of milk have been acknowledged throughout human history, with scientific research over the past 50 years elucidating its nutritional composition and functional benefits. This article presents a contemporary analysis of modern casein chemistry, emphasizing the specialized engineering of dairy proteins for optimizing resource utilization. It explores the unique structure of casein micelles as supramolecular complexes, where ionic interactions promote electron sharing between phosphoserines and calcium phosphate nanoclusters. This review aims to synthesize recent literature on casein nanocomplexes and explore their potential in industrial applications such as drug delivery and sustainable food engineering. Casein-based bio-nanocomposites have emerged as a significant research interest in food science, offering considerable potential for a wide array of scientific applications, such as drug formulation and nutraceutical delivery. It is crucial for scientists to engage in ongoing research and development efforts to encourage sustainable progress, enhance commercial viability, improve manufacturing processes, and expand the engineering applications of casein micelles toward fostering an eco-friendly industry.
DOI: https://doi.org/10.37349/eff.2025.101099
Aim:
Fruits from the tropical Annona genus of family Annonaceae have long been cultivated in tropical Latin America, Africa, and southeastern Asia. Asimina triloba is a temperate fruit from Annonaceae, but few comparisons between Annonaceae fruits exist. The objective was to determine how 21 days of refrigerated storage affected the carotenoids and color in ripe and overripe A. triloba. A comparison to tropical Annonaceae fruits is provided.
Methods:
Pawpaw pulp was stored refrigerated for 21 days. Total carotenoids and β-carotene were determined spectrophotometrically and by HPLC, respectively. C.I.E. L*, a*, and b* values were used to calculate hue angle, chroma, total color change (ΔE), browning index, which have been reported in A. triloba previously, and color index, whiteness index, yellowness index, the ratio of a*/b*, and percent change in L*, which are reported herein for the first time.
Results:
Overripe pulp contains 5-fold more carotenoids than ripe pulp. A significant decline in total carotenoids was observed during refrigerated storage in the overripe pulp, but not in fresh pulp. At the onset of refrigerated storage, ripe pulp was significantly less brown than overripe pulp, but became more brown during refrigerated storage. No further change in browning was observed during storage of overripe pulp.
Conclusions:
Using established conversion factors and the values generated in this study, preliminary indications are that ripe A. triloba pulp provides 4.0% (males) and 5.1% (females) of the U.S. Recommended Dietary Allowance (USRDA) of vitamin A for individuals 14 years or older, and overripe provides 3.5% and 4.6%. Carotenoids are well-characterized for Annona muricata (A. muricata), Annona reticulata (A. reticulata), and Annona squamosa (A. squamosa), but these provide less than 1% of the USRDA of vitamin A. A comparison revealed that Annonaceae fruit are nutrient-dense, provide fiber and potassium, are low in fat and protein, and have comparable calcium, iron, magnesium, potassium, and sodium levels. Understanding Annonaceae fruits nutritional value may facilitate increased economic potential.
Aim:
Fruits from the tropical Annona genus of family Annonaceae have long been cultivated in tropical Latin America, Africa, and southeastern Asia. Asimina triloba is a temperate fruit from Annonaceae, but few comparisons between Annonaceae fruits exist. The objective was to determine how 21 days of refrigerated storage affected the carotenoids and color in ripe and overripe A. triloba. A comparison to tropical Annonaceae fruits is provided.
Methods:
Pawpaw pulp was stored refrigerated for 21 days. Total carotenoids and β-carotene were determined spectrophotometrically and by HPLC, respectively. C.I.E. L*, a*, and b* values were used to calculate hue angle, chroma, total color change (ΔE), browning index, which have been reported in A. triloba previously, and color index, whiteness index, yellowness index, the ratio of a*/b*, and percent change in L*, which are reported herein for the first time.
Results:
Overripe pulp contains 5-fold more carotenoids than ripe pulp. A significant decline in total carotenoids was observed during refrigerated storage in the overripe pulp, but not in fresh pulp. At the onset of refrigerated storage, ripe pulp was significantly less brown than overripe pulp, but became more brown during refrigerated storage. No further change in browning was observed during storage of overripe pulp.
Conclusions:
Using established conversion factors and the values generated in this study, preliminary indications are that ripe A. triloba pulp provides 4.0% (males) and 5.1% (females) of the U.S. Recommended Dietary Allowance (USRDA) of vitamin A for individuals 14 years or older, and overripe provides 3.5% and 4.6%. Carotenoids are well-characterized for Annona muricata (A. muricata), Annona reticulata (A. reticulata), and Annona squamosa (A. squamosa), but these provide less than 1% of the USRDA of vitamin A. A comparison revealed that Annonaceae fruit are nutrient-dense, provide fiber and potassium, are low in fat and protein, and have comparable calcium, iron, magnesium, potassium, and sodium levels. Understanding Annonaceae fruits nutritional value may facilitate increased economic potential.
DOI: https://doi.org/10.37349/eff.2025.101098
The contamination of food by toxic chemical compounds is a significant global concern that threatens food safety and public health. These compounds originate from diverse sources, including naturally occurring toxins such as mycotoxins and plant alkaloids, environmental pollutants including heavy metals and persistent organic pollutants, substances formed during food processing and packaging such as acrylamide and bisphenol A, and newly emerging contaminants such as microplastics and nanoplastics. This review presents a comprehensive classification of toxic compounds in the food system, detailing their sources, persistence, and behavior within the environment. The objective of this study is to explore the toxicity, toxicokinetics, and toxicodynamics of foodborne contaminants by examining their absorption, distribution, metabolism, excretion, and mechanisms of biotransformation. The review also discusses how these toxicants interact with cellular and molecular targets, leading to adverse effects on various organs and biological systems. Furthermore, the manuscript highlights both conventional detection methods such as immunoassays, chromatographic and spectroscopic techniques, biochemical and microbiological assay, and recent innovations, including nanotechnology-based biosensors and computational tools driven by artificial intelligence. A novel contribution of this review is the inclusion of standardized chemical identifiers such as systematic names by the International Union of Pure and Applied Chemistry, the International Chemical Identifier, the Simplified Molecular Input Line Entry Specification, and the Chemical Abstracts Service Registry Number used in food-risk component databases. Additionally, the application of the One Health approach offers an integrated perspective on human, animal, and environmental health. This review identifies research gaps and promotes enhanced monitoring, regulation, and management strategies to ensure sustainable food safety.
The contamination of food by toxic chemical compounds is a significant global concern that threatens food safety and public health. These compounds originate from diverse sources, including naturally occurring toxins such as mycotoxins and plant alkaloids, environmental pollutants including heavy metals and persistent organic pollutants, substances formed during food processing and packaging such as acrylamide and bisphenol A, and newly emerging contaminants such as microplastics and nanoplastics. This review presents a comprehensive classification of toxic compounds in the food system, detailing their sources, persistence, and behavior within the environment. The objective of this study is to explore the toxicity, toxicokinetics, and toxicodynamics of foodborne contaminants by examining their absorption, distribution, metabolism, excretion, and mechanisms of biotransformation. The review also discusses how these toxicants interact with cellular and molecular targets, leading to adverse effects on various organs and biological systems. Furthermore, the manuscript highlights both conventional detection methods such as immunoassays, chromatographic and spectroscopic techniques, biochemical and microbiological assay, and recent innovations, including nanotechnology-based biosensors and computational tools driven by artificial intelligence. A novel contribution of this review is the inclusion of standardized chemical identifiers such as systematic names by the International Union of Pure and Applied Chemistry, the International Chemical Identifier, the Simplified Molecular Input Line Entry Specification, and the Chemical Abstracts Service Registry Number used in food-risk component databases. Additionally, the application of the One Health approach offers an integrated perspective on human, animal, and environmental health. This review identifies research gaps and promotes enhanced monitoring, regulation, and management strategies to ensure sustainable food safety.
DOI: https://doi.org/10.37349/eff.2025.101097
Aim:
Underexploited local plant resources, such as tiger nuts, have significant nutritional potential. Tiger nuts can be used to produce a plant-based yoghurt that would enable people suffering from lactose intolerance to enjoy its benefits. This study aimed to evaluate the sensory acceptability, physicochemical, and nutritional properties of a yoghurt-like product made with tiger nuts pretreated by various methods (soaking, drying, roasting, boiling, and germination).
Methods:
Six types of vegetable yoghurt were produced from the milk obtained after different pretreatment methods (soaking, germination, roasting, drying, and boiling) of tiger nuts. A control sample was made of untreated tiger nuts. Nutritional analyses were carried out using conventional methods. Quantifying bioactive and antinutrient compounds was conducted via spectrophotometry and titration methods. Physicochemical analysis of samples was also carried out. A consumer preference test was conducted using an untrained panel.
Results:
Yoghurt samples made with tiger nuts, pretreated through roasting, showed the best sensory characteristics and overall acceptability. Drying of tiger nuts resulted in a significantly higher energy value, as did the protein content (5.46%) in the germinated yoghurt and the fibre content (2.80%) in the boiled yoghurt. Syneresis and water holding capacity decrease slightly during all the pretreatment methods applied. With regards to bioactive compounds, phenolic compounds [393.39 mg GAE (gallic acid equivalent)/100 g DM (dry matter)] were more abundant in the yoghurt whose seeds were boiled, while the content of alkaloids [1,178.08 mg QE (quinine equivalent)/100 g DM] was higher in the products made with roasted tiger nuts. Roasting and germination were respectively the most effective pretreatment methods for the reduction of the amount of phytate and saponin.
Conclusions:
Production of yoghurt with roasted tiger nuts appears to be the best option in terms of its sensory attributes and its nutritional properties. Its consumption will contribute significantly to improving the nutrient and bioactive compounds intake for those suffering from lactose intolerance.
Aim:
Underexploited local plant resources, such as tiger nuts, have significant nutritional potential. Tiger nuts can be used to produce a plant-based yoghurt that would enable people suffering from lactose intolerance to enjoy its benefits. This study aimed to evaluate the sensory acceptability, physicochemical, and nutritional properties of a yoghurt-like product made with tiger nuts pretreated by various methods (soaking, drying, roasting, boiling, and germination).
Methods:
Six types of vegetable yoghurt were produced from the milk obtained after different pretreatment methods (soaking, germination, roasting, drying, and boiling) of tiger nuts. A control sample was made of untreated tiger nuts. Nutritional analyses were carried out using conventional methods. Quantifying bioactive and antinutrient compounds was conducted via spectrophotometry and titration methods. Physicochemical analysis of samples was also carried out. A consumer preference test was conducted using an untrained panel.
Results:
Yoghurt samples made with tiger nuts, pretreated through roasting, showed the best sensory characteristics and overall acceptability. Drying of tiger nuts resulted in a significantly higher energy value, as did the protein content (5.46%) in the germinated yoghurt and the fibre content (2.80%) in the boiled yoghurt. Syneresis and water holding capacity decrease slightly during all the pretreatment methods applied. With regards to bioactive compounds, phenolic compounds [393.39 mg GAE (gallic acid equivalent)/100 g DM (dry matter)] were more abundant in the yoghurt whose seeds were boiled, while the content of alkaloids [1,178.08 mg QE (quinine equivalent)/100 g DM] was higher in the products made with roasted tiger nuts. Roasting and germination were respectively the most effective pretreatment methods for the reduction of the amount of phytate and saponin.
Conclusions:
Production of yoghurt with roasted tiger nuts appears to be the best option in terms of its sensory attributes and its nutritional properties. Its consumption will contribute significantly to improving the nutrient and bioactive compounds intake for those suffering from lactose intolerance.
DOI: https://doi.org/10.37349/eff.2025.101096
Aim:
This study examined the combined effects of pretreatment methods (blanching, citric acid, and ascorbic acid) and oven drying on the chemical composition and sensory quality of fried yam (Dioscorea rotundata) chips, aimed at optimizing processing conditions for improved product quality.
Methods:
Fresh yam slices were subjected to three pretreatment conditions: blanching (4 min at 100°C), a 5% citric acid solution, and a 1% ascorbic acid solution, compared to the untreated samples (control). All samples underwent convective drying at 80°C with an air velocity of 2.0 m/s. The proximate composition and mineral content of the dried samples were evaluated using official methods of food analysis and atomic absorption spectroscopy, respectively, while the color parameters and sensory evaluations of the fried yam chips were conducted using a colorimeter and a nine-point hedonic scale.
Results:
Both pretreatment and drying significantly (p < 0.05) influenced mineral content in the dried yam chips. In comparison to the control, all proximate constituents decreased after drying, except for carbohydrates, which increased in the dried pre-treated samples. The fried samples of yam chips that had been blanched for 4 min received higher acceptability scores for taste, color, crispiness, and overall acceptability on the sensory scale, compared to samples pre-treated with 1% ascorbic acid and 5% citric acid. However, the acid pre-treated samples demonstrated the least browning effect in the fried products.
Conclusions:
The processes of pretreatment and drying significantly modified both the mineral and proximate composition of the yam chips, increasing carbohydrates while other components decreased post-processing. Blanched samples exhibited superior sensory acceptability across all attributes, while the acid pretreatments effectively reduced browning in the final fried products.
Aim:
This study examined the combined effects of pretreatment methods (blanching, citric acid, and ascorbic acid) and oven drying on the chemical composition and sensory quality of fried yam (Dioscorea rotundata) chips, aimed at optimizing processing conditions for improved product quality.
Methods:
Fresh yam slices were subjected to three pretreatment conditions: blanching (4 min at 100°C), a 5% citric acid solution, and a 1% ascorbic acid solution, compared to the untreated samples (control). All samples underwent convective drying at 80°C with an air velocity of 2.0 m/s. The proximate composition and mineral content of the dried samples were evaluated using official methods of food analysis and atomic absorption spectroscopy, respectively, while the color parameters and sensory evaluations of the fried yam chips were conducted using a colorimeter and a nine-point hedonic scale.
Results:
Both pretreatment and drying significantly (p < 0.05) influenced mineral content in the dried yam chips. In comparison to the control, all proximate constituents decreased after drying, except for carbohydrates, which increased in the dried pre-treated samples. The fried samples of yam chips that had been blanched for 4 min received higher acceptability scores for taste, color, crispiness, and overall acceptability on the sensory scale, compared to samples pre-treated with 1% ascorbic acid and 5% citric acid. However, the acid pre-treated samples demonstrated the least browning effect in the fried products.
Conclusions:
The processes of pretreatment and drying significantly modified both the mineral and proximate composition of the yam chips, increasing carbohydrates while other components decreased post-processing. Blanched samples exhibited superior sensory acceptability across all attributes, while the acid pretreatments effectively reduced browning in the final fried products.
DOI: https://doi.org/10.37349/eff.2025.101095
This article belongs to the special issue The food (r)evolution towards food quality/security and human nutrition
Aim:
This study examined the knowledge and consumption patterns of fermented foods among undergraduate students, comparing those enrolled in Food and Nutrition programs with students from other academic disciplines.
Methods:
A cross-sectional survey of 328 Canadian university students gathered demographic data and assessed familiarity, understanding, and intake of fermented food products.
Results:
While 78% of students reported familiarity with fermented foods, only 23% could accurately define fermentation. Students in Food and Nutrition programs demonstrated stronger knowledge, correctly answering 67% of related questions versus 62% in other disciplines (p = 0.07; 90% CI). Consumption rates were high overall, with 96% of participants reporting they consumed fermented foods. Significant differences were found between groups in specific categories: fermented fruits and vegetables (p = 0.02), soybeans (p = 0.002), grains (p = 0.02), and meat products (p = 0.017). Regarding frequency, 36% of students consumed a variety of fermented foods weekly, while 30% reported monthly consumption.
Conclusions:
Cultural background, taste preference, and educational focus also appear to influence dietary behaviors. Enrollment in a Food and Nutrition program was linked to both higher knowledge and increased intake. To the best of our knowledge, this is the first Canadian study to explore differences in fermented food knowledge and consumption across academic disciplines. These results support the potential of education-based strategies to promote healthier dietary patterns and warrant further research across more diverse populations.
Aim:
This study examined the knowledge and consumption patterns of fermented foods among undergraduate students, comparing those enrolled in Food and Nutrition programs with students from other academic disciplines.
Methods:
A cross-sectional survey of 328 Canadian university students gathered demographic data and assessed familiarity, understanding, and intake of fermented food products.
Results:
While 78% of students reported familiarity with fermented foods, only 23% could accurately define fermentation. Students in Food and Nutrition programs demonstrated stronger knowledge, correctly answering 67% of related questions versus 62% in other disciplines (p = 0.07; 90% CI). Consumption rates were high overall, with 96% of participants reporting they consumed fermented foods. Significant differences were found between groups in specific categories: fermented fruits and vegetables (p = 0.02), soybeans (p = 0.002), grains (p = 0.02), and meat products (p = 0.017). Regarding frequency, 36% of students consumed a variety of fermented foods weekly, while 30% reported monthly consumption.
Conclusions:
Cultural background, taste preference, and educational focus also appear to influence dietary behaviors. Enrollment in a Food and Nutrition program was linked to both higher knowledge and increased intake. To the best of our knowledge, this is the first Canadian study to explore differences in fermented food knowledge and consumption across academic disciplines. These results support the potential of education-based strategies to promote healthier dietary patterns and warrant further research across more diverse populations.
DOI: https://doi.org/10.37349/eff.2025.101093
Heavy metal contamination of food is a critical global health issue due to its toxic, bioaccumulative, and often carcinogenic effects. This study presents a comprehensive bibliometric analysis of research published between 2000 and 2024 on health risk assessments associated with heavy metal exposure through the consumption of cereal products. Data were extracted from the Web of Science database and analyzed using VOSviewer software to visualize trends in terms of authors, institutional and international collaboration, and areas of thematic interest. The findings reveal a growing scientific interest in this field, with a peak in publication volume in 2020. China emerged as the main contributor, accounting for almost half of all publications, followed by Iran, Spain, and Brazil. The Chinese Academy of Sciences and Shahid Beheshti University of Medical Sciences were among the most active institutions. Journals such as Environmental Science and Pollution Research and Science of the Total Environment were identified as key publication platforms. The collaborative analysis highlights China and the USA as major centres of international collaboration, with peripheral but active contributions from countries such as England, Bangladesh, and Malaysia. Most studies focused on exposure pathways and assessed both carcinogenic and non-carcinogenic health risks, frequently reporting values above safe thresholds. These findings highlight the urgent need for national long-term monitoring programmes and the development of country-specific strategies to reduce exposure to heavy metals in food, thereby enhancing public health protection and regulatory compliance.
Heavy metal contamination of food is a critical global health issue due to its toxic, bioaccumulative, and often carcinogenic effects. This study presents a comprehensive bibliometric analysis of research published between 2000 and 2024 on health risk assessments associated with heavy metal exposure through the consumption of cereal products. Data were extracted from the Web of Science database and analyzed using VOSviewer software to visualize trends in terms of authors, institutional and international collaboration, and areas of thematic interest. The findings reveal a growing scientific interest in this field, with a peak in publication volume in 2020. China emerged as the main contributor, accounting for almost half of all publications, followed by Iran, Spain, and Brazil. The Chinese Academy of Sciences and Shahid Beheshti University of Medical Sciences were among the most active institutions. Journals such as Environmental Science and Pollution Research and Science of the Total Environment were identified as key publication platforms. The collaborative analysis highlights China and the USA as major centres of international collaboration, with peripheral but active contributions from countries such as England, Bangladesh, and Malaysia. Most studies focused on exposure pathways and assessed both carcinogenic and non-carcinogenic health risks, frequently reporting values above safe thresholds. These findings highlight the urgent need for national long-term monitoring programmes and the development of country-specific strategies to reduce exposure to heavy metals in food, thereby enhancing public health protection and regulatory compliance.
DOI: https://doi.org/10.37349/eff.2025.101094
This article belongs to the special issue Food Contaminants: Analysis, Occurrence and Risk Assessment
Aim:
Soya (Glycine max L.) is a legume rich in nutrients (proteins, lipids, carbohydrates, and minerals) but also in anti-nutrients such as oxalate, which hampers the bioavailability of nutrients. The various processes used to treat it reduce the anti-nutrient content while affecting the protein content to a greater or lesser extent. This study aimed to evaluate the impact of a soaking period followed by cooking on the reduction of oxalates and enhancement of protein availability in soya flour.
Methods:
To achieve this, the response surface methodology with the centred composite design was used to reduce the oxalate content and increase the protein content of cooked soya flour. The factors chosen were soaking time (5–24 h), cooking time (15–50 min), and cooking temperature (70–100°C). The soya flours obtained were characterised for protein and oxalate content using standard methods. The optimal samples were also characterised.
Results:
The results obtained showed that cooking and soaking times, followed by the quadratic effect of soaking time, significantly (p < 0.05) increase the protein content and decrease the oxalate content. In terms of optimal conditions, a soaking time of 25.44 h, a cooking temperature of 101.05°C, and a cooking time of 61.93 min reduced the oxalate content by 87.43% and also increased the protein content from 35.98 g/100 g DM to 49.16 g/100 g DM. Optimal conditions of the different treatments also increase lipids, reducing sugar, and the main minerals like Ca, P, Mg, and Fe.
Conclusions:
The application of such conditions would help to combat protein deficiencies.
Aim:
Soya (Glycine max L.) is a legume rich in nutrients (proteins, lipids, carbohydrates, and minerals) but also in anti-nutrients such as oxalate, which hampers the bioavailability of nutrients. The various processes used to treat it reduce the anti-nutrient content while affecting the protein content to a greater or lesser extent. This study aimed to evaluate the impact of a soaking period followed by cooking on the reduction of oxalates and enhancement of protein availability in soya flour.
Methods:
To achieve this, the response surface methodology with the centred composite design was used to reduce the oxalate content and increase the protein content of cooked soya flour. The factors chosen were soaking time (5–24 h), cooking time (15–50 min), and cooking temperature (70–100°C). The soya flours obtained were characterised for protein and oxalate content using standard methods. The optimal samples were also characterised.
Results:
The results obtained showed that cooking and soaking times, followed by the quadratic effect of soaking time, significantly (p < 0.05) increase the protein content and decrease the oxalate content. In terms of optimal conditions, a soaking time of 25.44 h, a cooking temperature of 101.05°C, and a cooking time of 61.93 min reduced the oxalate content by 87.43% and also increased the protein content from 35.98 g/100 g DM to 49.16 g/100 g DM. Optimal conditions of the different treatments also increase lipids, reducing sugar, and the main minerals like Ca, P, Mg, and Fe.
Conclusions:
The application of such conditions would help to combat protein deficiencies.
DOI: https://doi.org/10.37349/eff.2025.101091
Aim:
Despite being a fruit rich in resistant starch, acorns remain undervalued. Resistant starch is known to improve food acceptability when compared to traditional insoluble fibers, and recent research suggests the usage of acorn starch as an additive in fermented yogurt and milk products. Furthermore, non-thermal technologies such as high hydrostatic pressure and pulsed electric field can produce clean-labelled starches. Milk puddings are widely consumed all over the world and are usually produced using representative amounts of starch, making them an enticing food matrix for incorporating acorn starches. Hence, the effects of replacing commercial corn starch with acorn starch extracted by high hydrostatic pressure and pulsed electric field on the nutritional composition, functional and sensorial properties, and shelf-life of puddings were studied.
Methods:
Extraction of starch from Quercus robur acorns was performed using high hydrostatic pressure or pulsed electric field. Extracted starch was used in chocolate puddings, replacing commercial corn starch. Shelf-life storage and microbiological analysis were conducted over 28 days, along with texture, color, pH, and nutritional composition assessments. Rheological properties, scanning electron microscopy, in vitro digestion, and soluble sugar, fatty acid, and salt content analyses were performed. Sensorial analysis was conducted with 71 volunteer panelists to evaluate the acceptability, preference, and similarity of puddings.
Results:
Replacing the commercial corn starch with acorn starch improves the rheological properties of puddings and has no negative impact on the nutritional composition, internal structure, or in vitro digestibility. Sensory analysis revealed that panelists preferred the acorn starch puddings over the control. After 28 days of storage at 4°C, there was a greater stabilization of the color parameters and an improvement in textural parameters of puddings without compromising microbial safety.
Conclusions:
This study demonstrates the potential usage of starch from acorns in food applications, a fruit that is so undervalued.
Aim:
Despite being a fruit rich in resistant starch, acorns remain undervalued. Resistant starch is known to improve food acceptability when compared to traditional insoluble fibers, and recent research suggests the usage of acorn starch as an additive in fermented yogurt and milk products. Furthermore, non-thermal technologies such as high hydrostatic pressure and pulsed electric field can produce clean-labelled starches. Milk puddings are widely consumed all over the world and are usually produced using representative amounts of starch, making them an enticing food matrix for incorporating acorn starches. Hence, the effects of replacing commercial corn starch with acorn starch extracted by high hydrostatic pressure and pulsed electric field on the nutritional composition, functional and sensorial properties, and shelf-life of puddings were studied.
Methods:
Extraction of starch from Quercus robur acorns was performed using high hydrostatic pressure or pulsed electric field. Extracted starch was used in chocolate puddings, replacing commercial corn starch. Shelf-life storage and microbiological analysis were conducted over 28 days, along with texture, color, pH, and nutritional composition assessments. Rheological properties, scanning electron microscopy, in vitro digestion, and soluble sugar, fatty acid, and salt content analyses were performed. Sensorial analysis was conducted with 71 volunteer panelists to evaluate the acceptability, preference, and similarity of puddings.
Results:
Replacing the commercial corn starch with acorn starch improves the rheological properties of puddings and has no negative impact on the nutritional composition, internal structure, or in vitro digestibility. Sensory analysis revealed that panelists preferred the acorn starch puddings over the control. After 28 days of storage at 4°C, there was a greater stabilization of the color parameters and an improvement in textural parameters of puddings without compromising microbial safety.
Conclusions:
This study demonstrates the potential usage of starch from acorns in food applications, a fruit that is so undervalued.
DOI: https://doi.org/10.37349/eff.2025.101092
This article belongs to the special issue The food (r)evolution towards food quality/security and human nutrition
Aim:
This study attempts to offer a viable and sustainable solution related to the tomato value chain, which plays an active role in human diets but deteriorates very fast due to its short shelf life.
Methods:
Fresh lemons (Citrus limon) and tomatoes (Solanum lycopersicum L.) were purchased from the local market. Previously, varying percentages of lemon juice (0%, 1%, 3%, 5%, and 10%) were added to clear jars containing peeled and pasted tomatoes, which were then sterilized. The physicochemical, antioxidant, nutritional, and microbiological characteristics of appertized tomato samples were assessed through the use of standardized techniques.
Results:
The addition of lemon juice significantly (P ˂ 0.05) reduced the total phenolic content of appertized tomatoes, while increasing the titratable acidity (P ˂ 0.05) and decreasing the hydrogen potential (pH) content (P ˂ 0.05). However, the addition of 10 g of lemon juice recorded the high flavonoid content (0.01 mg CE/g) and carotenoid content (16.52 mg/100 g) of samples. In terms of nutritional value, adding lemon juice to appertized tomatoes considerably reduced (P ˂ 0.05) their protein content while increasing their carbohydrate content. Regarding the mineral composition, the addition of lemon juice considerably (P ˂ 0.05) raised the amounts of calcium (Ca), phosphorus (P), and magnesium (Mg) in the appertized tomato samples. The results of this investigation fall within the ranges of the daily allowances that are advised. Pathogens including Salmonella, Clostridium, and Escherichia coli are inhibited, and yeasts and molds are destroyed, ensuring the product’s microbiological quality [476.57 to 0 colony-forming unit (CFU)].
Conclusions:
Lemon juice helps to preserve consumer health and improve the preservation of appertized tomatoes.
Aim:
This study attempts to offer a viable and sustainable solution related to the tomato value chain, which plays an active role in human diets but deteriorates very fast due to its short shelf life.
Methods:
Fresh lemons (Citrus limon) and tomatoes (Solanum lycopersicum L.) were purchased from the local market. Previously, varying percentages of lemon juice (0%, 1%, 3%, 5%, and 10%) were added to clear jars containing peeled and pasted tomatoes, which were then sterilized. The physicochemical, antioxidant, nutritional, and microbiological characteristics of appertized tomato samples were assessed through the use of standardized techniques.
Results:
The addition of lemon juice significantly (P ˂ 0.05) reduced the total phenolic content of appertized tomatoes, while increasing the titratable acidity (P ˂ 0.05) and decreasing the hydrogen potential (pH) content (P ˂ 0.05). However, the addition of 10 g of lemon juice recorded the high flavonoid content (0.01 mg CE/g) and carotenoid content (16.52 mg/100 g) of samples. In terms of nutritional value, adding lemon juice to appertized tomatoes considerably reduced (P ˂ 0.05) their protein content while increasing their carbohydrate content. Regarding the mineral composition, the addition of lemon juice considerably (P ˂ 0.05) raised the amounts of calcium (Ca), phosphorus (P), and magnesium (Mg) in the appertized tomato samples. The results of this investigation fall within the ranges of the daily allowances that are advised. Pathogens including Salmonella, Clostridium, and Escherichia coli are inhibited, and yeasts and molds are destroyed, ensuring the product’s microbiological quality [476.57 to 0 colony-forming unit (CFU)].
Conclusions:
Lemon juice helps to preserve consumer health and improve the preservation of appertized tomatoes.
DOI: https://doi.org/10.37349/eff.2025.101090
Aim:
The study evaluated the influence of different wall materials on the bioactive compounds in encapsulated Justicia carnea leaves extract.
Methods:
Combinations of gelatin with maltodextrin or starch, and gum arabic with maltodextrin or starch were prepared in ratios of 1:3 to create four types of wall matrices. Each combination was dissolved in water to obtain 20% w/v solutions. J. carnea leaves were extracted, concentrated, and the resulting extract added to the wall material at a ratio of 1:2 and homogenized. Encapsulation was achieved through homogenization at 12,000 rpm for 30 min, followed by freeze drying. The resulting microcapsules were characterized using a scanning electron microscope (SEM) and differential scanning calorimeter (DSC). Physicochemical properties, pigment concentrations, and micronutrient compositions of the microcapsules were also evaluated using standard methods.
Results:
Carotenoids, chlorophyll, and anthocyanin were significantly higher (P ≤ 0.05) in the sample containing starch and gelatin [gelatin + starch + core (DGES)] as the wall matrix compared to other samples. Vitamins E and D, calcium (Ca), and manganese (Mn) in sample gum arabic + starch + core (CGS; blend of gum arabic starch) and sample DGES were not significantly different from each other. DGES exhibited significantly lower (60.19%) solubility than others (60.48–70.86%) and the highest (76.72%) encapsulation efficiency. SEM analysis revealed smooth surfaces and mostly polyhedral shapes, with particle sizes ranging from 10.534–14.159 μm across all samples. DSC analysis revealed that the particles are endothermic and amorphous in nature, except for the CGS sample, which became semi-crystalline at about 203.2°C.
Conclusions:
The study showed that a composite wall material comprising starch and gelatin demonstrates enhanced effectiveness in the encapsulation of J. carnea leaves bioactive compounds.
Aim:
The study evaluated the influence of different wall materials on the bioactive compounds in encapsulated Justicia carnea leaves extract.
Methods:
Combinations of gelatin with maltodextrin or starch, and gum arabic with maltodextrin or starch were prepared in ratios of 1:3 to create four types of wall matrices. Each combination was dissolved in water to obtain 20% w/v solutions. J. carnea leaves were extracted, concentrated, and the resulting extract added to the wall material at a ratio of 1:2 and homogenized. Encapsulation was achieved through homogenization at 12,000 rpm for 30 min, followed by freeze drying. The resulting microcapsules were characterized using a scanning electron microscope (SEM) and differential scanning calorimeter (DSC). Physicochemical properties, pigment concentrations, and micronutrient compositions of the microcapsules were also evaluated using standard methods.
Results:
Carotenoids, chlorophyll, and anthocyanin were significantly higher (P ≤ 0.05) in the sample containing starch and gelatin [gelatin + starch + core (DGES)] as the wall matrix compared to other samples. Vitamins E and D, calcium (Ca), and manganese (Mn) in sample gum arabic + starch + core (CGS; blend of gum arabic starch) and sample DGES were not significantly different from each other. DGES exhibited significantly lower (60.19%) solubility than others (60.48–70.86%) and the highest (76.72%) encapsulation efficiency. SEM analysis revealed smooth surfaces and mostly polyhedral shapes, with particle sizes ranging from 10.534–14.159 μm across all samples. DSC analysis revealed that the particles are endothermic and amorphous in nature, except for the CGS sample, which became semi-crystalline at about 203.2°C.
Conclusions:
The study showed that a composite wall material comprising starch and gelatin demonstrates enhanced effectiveness in the encapsulation of J. carnea leaves bioactive compounds.
DOI: https://doi.org/10.37349/eff.2025.101089
Aim:
Protein structure-function relationship understanding is very important to the study of protein chemistry. In this study, we determined the 3D structure of glutelin type-B 5-like (GTB) protein from proso millet and investigated the effects of simulated temperature and static electric field on GTB protein’s secondary structures, solvent accessibility surface area (SASA), the radius of gyration (Rg), root mean square deviation (RMSD), and total dipole moment with the view to elucidate its structural behavior under different simulated processing stresses.
Methods:
This study leveraged homology modeling to determine the 3D structure of the GTB protein from proso millet. We further explored in silico modeling using molecular dynamic modeling tools to study the behavior of the GTB protein structure under simulated temperatures and static electric field processing stresses.
Results:
The 3D protein structure of GTB is majorly a protomer that comprises three monomers with one jelly-like β-barrel and two extended helix domains, and the remaining 35% as coils. From the molecular dynamic simulation, the secondary structure of the protein was not disrupted at temperatures between 300–400 K and static electric fields between 0.1–3 V/nm, albeit with the loss of a few amino acid residues. The RMSD increased significantly with temperature, static electric field, and simulation time increase. However, the Rg and SASA decreased for the same conditions, suggesting that the protein structure is compacting during thermal and electrical treatment.
Conclusions:
We concluded that low levels of simulated temperature and low levels of the electric field may cause a temporary reversible conformational change of GTB protein, not enough to cause a major disruption as may be expected during empirical processing of protein. To achieve greater disruption that would mimic protein denaturation, there is a need for in silico study of protein molecules under more aggressive simulated stressors for a longer time, and consideration given to protein structure development from AlphaFold3.
Aim:
Protein structure-function relationship understanding is very important to the study of protein chemistry. In this study, we determined the 3D structure of glutelin type-B 5-like (GTB) protein from proso millet and investigated the effects of simulated temperature and static electric field on GTB protein’s secondary structures, solvent accessibility surface area (SASA), the radius of gyration (Rg), root mean square deviation (RMSD), and total dipole moment with the view to elucidate its structural behavior under different simulated processing stresses.
Methods:
This study leveraged homology modeling to determine the 3D structure of the GTB protein from proso millet. We further explored in silico modeling using molecular dynamic modeling tools to study the behavior of the GTB protein structure under simulated temperatures and static electric field processing stresses.
Results:
The 3D protein structure of GTB is majorly a protomer that comprises three monomers with one jelly-like β-barrel and two extended helix domains, and the remaining 35% as coils. From the molecular dynamic simulation, the secondary structure of the protein was not disrupted at temperatures between 300–400 K and static electric fields between 0.1–3 V/nm, albeit with the loss of a few amino acid residues. The RMSD increased significantly with temperature, static electric field, and simulation time increase. However, the Rg and SASA decreased for the same conditions, suggesting that the protein structure is compacting during thermal and electrical treatment.
Conclusions:
We concluded that low levels of simulated temperature and low levels of the electric field may cause a temporary reversible conformational change of GTB protein, not enough to cause a major disruption as may be expected during empirical processing of protein. To achieve greater disruption that would mimic protein denaturation, there is a need for in silico study of protein molecules under more aggressive simulated stressors for a longer time, and consideration given to protein structure development from AlphaFold3.
DOI: https://doi.org/10.37349/eff.2025.101088
Aim:
The germination of maize leads to many physiological changes in the plant. These changes are responsible for the appearance, disappearance, and variation in concentration of numerous compounds, including secondary metabolites. The aim of this study was to compare the secondary metabolite profile of two maize varieties germinated under controlled optimal conditions.
Methods:
To achieve this, the Atp-Y variety was soaked for 25.12 h at 25.54˚C in the presence of 0.5238% plant ash, germinated for 144.37 h, and matured for 37.65 h. For the Coca-sr variety, the grains were soaked for 1.608 h at 36.63˚C in the presence of 1.1093% plant ash. Germination and ripening took 144.37 h and 27.07 h, respectively. The compounds were extracted in methanol (HPLC grade) before being injected into a gas chromatography-mass spectrometry (GC-MS) equipped with an Rtx-5MS column for metabolite profiling.
Results:
These analyses showed that variety and optimum germination conditions influenced the secondary metabolite profile. This profiling identified 15 and 12 compounds in the Atp-Y and Coca-sr varieties, respectively. Of these compounds, 8 were identified in both varieties. The groups of compounds identified were fatty acids, esters, ketones, phenols, polyols, alcohols, sterols, and unclassified substances. Fatty acids were the most abundant, with proportions of 90.93% and 91.08% Atp-Y and Coca-sr, respectively. Within this group of compounds, (Z,Z)-9,12-octadecadienoic acid was the most abundant (46.58% for Atp-Y and 53.84% for Coca-sr), followed by (E)-9-octadecenoic acid (30.39% for Atp-Y and 25.09% for Coca-sr). 2-Methoxy-4-vinylphenol, a phenolic compound, was identified and quantified at 0.28% only in the Coca-sr variety, while the only polyol, 1,4-anhydro-D-mannitol, was identified in the Atp-Y variety.
Conclusions:
In view of these results, we would suggest using the Atp-Y variety to benefit from a wide range of compounds, but also to respect the malting conditions in order to benefit from the different compounds.
Aim:
The germination of maize leads to many physiological changes in the plant. These changes are responsible for the appearance, disappearance, and variation in concentration of numerous compounds, including secondary metabolites. The aim of this study was to compare the secondary metabolite profile of two maize varieties germinated under controlled optimal conditions.
Methods:
To achieve this, the Atp-Y variety was soaked for 25.12 h at 25.54˚C in the presence of 0.5238% plant ash, germinated for 144.37 h, and matured for 37.65 h. For the Coca-sr variety, the grains were soaked for 1.608 h at 36.63˚C in the presence of 1.1093% plant ash. Germination and ripening took 144.37 h and 27.07 h, respectively. The compounds were extracted in methanol (HPLC grade) before being injected into a gas chromatography-mass spectrometry (GC-MS) equipped with an Rtx-5MS column for metabolite profiling.
Results:
These analyses showed that variety and optimum germination conditions influenced the secondary metabolite profile. This profiling identified 15 and 12 compounds in the Atp-Y and Coca-sr varieties, respectively. Of these compounds, 8 were identified in both varieties. The groups of compounds identified were fatty acids, esters, ketones, phenols, polyols, alcohols, sterols, and unclassified substances. Fatty acids were the most abundant, with proportions of 90.93% and 91.08% Atp-Y and Coca-sr, respectively. Within this group of compounds, (Z,Z)-9,12-octadecadienoic acid was the most abundant (46.58% for Atp-Y and 53.84% for Coca-sr), followed by (E)-9-octadecenoic acid (30.39% for Atp-Y and 25.09% for Coca-sr). 2-Methoxy-4-vinylphenol, a phenolic compound, was identified and quantified at 0.28% only in the Coca-sr variety, while the only polyol, 1,4-anhydro-D-mannitol, was identified in the Atp-Y variety.
Conclusions:
In view of these results, we would suggest using the Atp-Y variety to benefit from a wide range of compounds, but also to respect the malting conditions in order to benefit from the different compounds.
DOI: https://doi.org/10.37349/eff.2025.101087
Aim:
The present work aims to propose an alternative analytical protocol for assessing the thermal stability of plant protection products between 90°C and 240°C. In that view, this work seeks to identify any degradation products that may be overlooked during regulatory hydrolysis studies. Thus, we evaluate if a new regulatory approach is necessary and how this could be done by academic research. This requires working under similar conditions.
Methods:
A comprehensive analytical workflow was designed and implemented for ten active substances to study and investigate their overall degradation behaviour and volatilisation. The results were then compared with those reported in the regulatory studies.
Results:
The ratio of detected degradation products to active substances ranged from 0.5% to 50%. Volatilization products were identified for all compounds analyzed using TGA-GC-MS. This confirmed the pattern of degradation followed by volatilisation, except for tetraconazole, which volatilises before degradation. Some of the detected compounds were not reported at all in regulatory studies, or were detected at higher concentrations, such as IN-EQW78 and 500M07.
Conclusions:
This study confirmed the feasibility of conducting thermodegradation studies without relying on radiolabelled substances. It also identified two overlooked products and emphasised the importance of conducting studies exceeding 120°C.
Aim:
The present work aims to propose an alternative analytical protocol for assessing the thermal stability of plant protection products between 90°C and 240°C. In that view, this work seeks to identify any degradation products that may be overlooked during regulatory hydrolysis studies. Thus, we evaluate if a new regulatory approach is necessary and how this could be done by academic research. This requires working under similar conditions.
Methods:
A comprehensive analytical workflow was designed and implemented for ten active substances to study and investigate their overall degradation behaviour and volatilisation. The results were then compared with those reported in the regulatory studies.
Results:
The ratio of detected degradation products to active substances ranged from 0.5% to 50%. Volatilization products were identified for all compounds analyzed using TGA-GC-MS. This confirmed the pattern of degradation followed by volatilisation, except for tetraconazole, which volatilises before degradation. Some of the detected compounds were not reported at all in regulatory studies, or were detected at higher concentrations, such as IN-EQW78 and 500M07.
Conclusions:
This study confirmed the feasibility of conducting thermodegradation studies without relying on radiolabelled substances. It also identified two overlooked products and emphasised the importance of conducting studies exceeding 120°C.
DOI: https://doi.org/10.37349/eff.2025.101086
