Naďa Hazuchová, J. Stávková, A. Siedlecka, Ľ. Nagyová
This work focuses on the area of food waste from the subjective perspective of the consumers themselves. The key source of data is a questionnaire survey with a sample selection of 3,429 respondents from the Czech Republic, Poland, and Slovakia, which are countries with historical and cultural ties. This survey was orchestrated in 2019 and it aimed to uncover the consumers' stances on this area. For every country involved, the results proved that the most common reason for food waste is that the food spoils when stored. One's stance on food waste is influenced by identifiers such as age, education, economic activity, and perceived income. A significant difference between the surveyed countries can be seen in the fact that Poles have over a 10× greater chance of wasting the smallest amount of food. Descriptive statistics, contingency analysis, and logistic regression were used to analyze the data. It is evident that subsequent research is necessary in this area, ideally with a united methodology for every country in the European Union.
{"title":"Consumers' stance on food waste in the Czech Republic, Poland, and Slovakia","authors":"Naďa Hazuchová, J. Stávková, A. Siedlecka, Ľ. Nagyová","doi":"10.3934/agrfood.2022040","DOIUrl":"https://doi.org/10.3934/agrfood.2022040","url":null,"abstract":"This work focuses on the area of food waste from the subjective perspective of the consumers themselves. The key source of data is a questionnaire survey with a sample selection of 3,429 respondents from the Czech Republic, Poland, and Slovakia, which are countries with historical and cultural ties. This survey was orchestrated in 2019 and it aimed to uncover the consumers' stances on this area. For every country involved, the results proved that the most common reason for food waste is that the food spoils when stored. One's stance on food waste is influenced by identifiers such as age, education, economic activity, and perceived income. A significant difference between the surveyed countries can be seen in the fact that Poles have over a 10× greater chance of wasting the smallest amount of food. Descriptive statistics, contingency analysis, and logistic regression were used to analyze the data. It is evident that subsequent research is necessary in this area, ideally with a united methodology for every country in the European Union.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Carsono, Fadlilah Aida Rahmani, R. Wibawa, S. Sari, Anas, R. Ohsawa, A. Shimono, H. Ezura
Tomato cv. Moneymaker was modified by the insertion of a miraculin gene, which can modify a sour taste into a sweet taste. Environmental safety assessment for this special transgenic crop is an important step in assessing how safe this tomato is before it is released into the environment. Evaluation of invasiveness, allelopathy and unintended effects is highly essential for environmental safety assessment. The evaluation of invasiveness was carried out by growing a mixture of transgenic and non-transgenic tomatoes with ratios of 0:100 and 100:0 (sole-cultivation) and 25:75, 50:50 and 75:25 (mix-cultivation). Wet and dry biomasses of three-week-old tomato plants were measured. Soil microbes were evaluated by determining microbial populations (culturable) and estimating soil respiration. Microbial populations were determined through total plate count, while soil respiration was estimated using the titration method to calculate the levels of carbon dioxide released during the incubation. It was found that the aggressiveness of the miraculin transgenic tomato was equal to that of its counterpart. There were also no significant differences in microbial populations and soil respiration of miraculin transgenic tomato compared with those of wild type. In addition, miraculin transgenic tomato did not produce allelopathy that interfered with surrounding crops. It is concluded that transgenic tomato is equal to its counterpart in invasiveness, with no effect to soil microbes and no potential allelopathy found.
{"title":"Invasiveness, allelopathic potential and unintended effects of miraculin transgenic tomato to soil microbes","authors":"N. Carsono, Fadlilah Aida Rahmani, R. Wibawa, S. Sari, Anas, R. Ohsawa, A. Shimono, H. Ezura","doi":"10.3934/agrfood.2022053","DOIUrl":"https://doi.org/10.3934/agrfood.2022053","url":null,"abstract":"Tomato cv. Moneymaker was modified by the insertion of a miraculin gene, which can modify a sour taste into a sweet taste. Environmental safety assessment for this special transgenic crop is an important step in assessing how safe this tomato is before it is released into the environment. Evaluation of invasiveness, allelopathy and unintended effects is highly essential for environmental safety assessment. The evaluation of invasiveness was carried out by growing a mixture of transgenic and non-transgenic tomatoes with ratios of 0:100 and 100:0 (sole-cultivation) and 25:75, 50:50 and 75:25 (mix-cultivation). Wet and dry biomasses of three-week-old tomato plants were measured. Soil microbes were evaluated by determining microbial populations (culturable) and estimating soil respiration. Microbial populations were determined through total plate count, while soil respiration was estimated using the titration method to calculate the levels of carbon dioxide released during the incubation. It was found that the aggressiveness of the miraculin transgenic tomato was equal to that of its counterpart. There were also no significant differences in microbial populations and soil respiration of miraculin transgenic tomato compared with those of wild type. In addition, miraculin transgenic tomato did not produce allelopathy that interfered with surrounding crops. It is concluded that transgenic tomato is equal to its counterpart in invasiveness, with no effect to soil microbes and no potential allelopathy found.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"29 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Evi Mintowati Kuntorini, L. Nugroho, Maryani, T. R. Nuringtyas
Rhodomyrtus tomentosa has been used as a traditional medicine for a long time in Southeast Asia countries and also in Indonesia. It is believed that the phytochemical content of its fruit at different levels of ripeness may affect its antioxidant activity. Therefore, this study aims to determine the antioxidant activity, phenols and flavonoids contents, and their distribution in the leaves and fruits of R. tomentosa at different levels of maturity. The antioxidant activity was determined using DPPH and FRAP analysis. Furthermore, the total flavonoid and phenolic contents were analyzed using the colorimetric and Folin–Ciocalteu methods. The distribution of secondary metabolites in the leaves or fruits tissues was determined using histochemical analysis. Antioxidant capacity was analyzed using DPPH and FRAP, and a comparable result was obtained. The highest antioxidant activity was observed in the green fruit with the value of 1419.75 ± 3.48 and 1367.59 ± 9.12 μmol TE/g DW for DPPH and FRAP, respectively. The highest TFC value observed in the young leaves and green fruits of the ethanol extract was 96.375 ± 3.96 and 95.731 ± 5.42 mg QE/g DW, respectively. The highest TPC was found in the red fruits 50.772 ± 7.46 mgAGE/g DW. The histochemical analysis provided a clear distribution of flavonoid and phenolic within the leaves and fruits. It was found that both compounds accumulated in the epidermis, mesophyll, vascular bundles, secretory cavity, and parenchyma midrib of the leaves, and also in the exocarp and mesocarp endocarp, secretory cavity, vascular bundles, seed, trichomes of the fruits. This study showed that young leaves and green fruits have a higher potency of being a natural source of antioxidants and flavonoid compounds
{"title":"Maturity effect on the antioxidant activity of leaves and fruits of Rhodomyrtus tomentosa (Aiton.) Hassk.","authors":"Evi Mintowati Kuntorini, L. Nugroho, Maryani, T. R. Nuringtyas","doi":"10.3934/agrfood.2022018","DOIUrl":"https://doi.org/10.3934/agrfood.2022018","url":null,"abstract":"Rhodomyrtus tomentosa has been used as a traditional medicine for a long time in Southeast Asia countries and also in Indonesia. It is believed that the phytochemical content of its fruit at different levels of ripeness may affect its antioxidant activity. Therefore, this study aims to determine the antioxidant activity, phenols and flavonoids contents, and their distribution in the leaves and fruits of R. tomentosa at different levels of maturity. The antioxidant activity was determined using DPPH and FRAP analysis. Furthermore, the total flavonoid and phenolic contents were analyzed using the colorimetric and Folin–Ciocalteu methods. The distribution of secondary metabolites in the leaves or fruits tissues was determined using histochemical analysis. Antioxidant capacity was analyzed using DPPH and FRAP, and a comparable result was obtained. The highest antioxidant activity was observed in the green fruit with the value of 1419.75 ± 3.48 and 1367.59 ± 9.12 μmol TE/g DW for DPPH and FRAP, respectively. The highest TFC value observed in the young leaves and green fruits of the ethanol extract was 96.375 ± 3.96 and 95.731 ± 5.42 mg QE/g DW, respectively. The highest TPC was found in the red fruits 50.772 ± 7.46 mgAGE/g DW. The histochemical analysis provided a clear distribution of flavonoid and phenolic within the leaves and fruits. It was found that both compounds accumulated in the epidermis, mesophyll, vascular bundles, secretory cavity, and parenchyma midrib of the leaves, and also in the exocarp and mesocarp endocarp, secretory cavity, vascular bundles, seed, trichomes of the fruits. This study showed that young leaves and green fruits have a higher potency of being a natural source of antioxidants and flavonoid compounds","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"78 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70182083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Camels are important dairy animals and are better milk producers in arid and desert environments than other livestock kept in the same environment. They not only survive but also produce more milk for longer periods than other animals, such as cattle. Camel milk has unique properties and a number of advantages as compared to milk from other species. This paper reviews recent developments on camel (Camelus dromedarius) milk, its nutritional and health benefits. It also addresses the peculiar characteristics of camel milk and its implications on processing and development of camel dairy products. Camel milk has superior nutritional quality and purported medicinal properties against a range of human illnesses including antidiabetic, anti-autistic, anti-microbial, antihypertensive, anticarcinogenic, anticholesterolemic, antioxidant, anti-inflammatory, hypoallergenic, hepatoprotective and immune boosting effects. The claimed therapeutic property of camel milk is attributed to its possession of various bioactive compounds as well as generation of bioactive peptides from intact proteins during digestion and/or fermentation of the milk. Although available reports mainly based on in vitro studies and animal models indicate the therapeutic potential of camel milk, the clinical effectiveness and value of camel milk as a therapeutic agent has not been conclusively confirmed. Camel milk differs markedly from bovine milk in terms of structural and functional properties of the milk components, and composition of individual proteins and its colloidal structures. These differences present challenges for processing camel milk into products.
{"title":"Recent advances on camel milk: Nutritional and health benefits and processing implications—A review","authors":"E. Seifu","doi":"10.3934/agrfood.2022048","DOIUrl":"https://doi.org/10.3934/agrfood.2022048","url":null,"abstract":"Camels are important dairy animals and are better milk producers in arid and desert environments than other livestock kept in the same environment. They not only survive but also produce more milk for longer periods than other animals, such as cattle. Camel milk has unique properties and a number of advantages as compared to milk from other species. This paper reviews recent developments on camel (Camelus dromedarius) milk, its nutritional and health benefits. It also addresses the peculiar characteristics of camel milk and its implications on processing and development of camel dairy products. Camel milk has superior nutritional quality and purported medicinal properties against a range of human illnesses including antidiabetic, anti-autistic, anti-microbial, antihypertensive, anticarcinogenic, anticholesterolemic, antioxidant, anti-inflammatory, hypoallergenic, hepatoprotective and immune boosting effects. The claimed therapeutic property of camel milk is attributed to its possession of various bioactive compounds as well as generation of bioactive peptides from intact proteins during digestion and/or fermentation of the milk. Although available reports mainly based on in vitro studies and animal models indicate the therapeutic potential of camel milk, the clinical effectiveness and value of camel milk as a therapeutic agent has not been conclusively confirmed. Camel milk differs markedly from bovine milk in terms of structural and functional properties of the milk components, and composition of individual proteins and its colloidal structures. These differences present challenges for processing camel milk into products.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70182978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eleutherine palmifolia is one of the medicinal plants widely used by the Dayak and Kutai tribes in Borneo Island, Indonesia as traditional medicines that can treat various diseases. Identification of the phytochemical content of E. palmifolia is very important to determine its potential as a medicinal plant. A significant factor in the success of the growth of E. palmifolia is the amount of fertilizer applied as a source of nutrients. In this study, the influence of various amounts of nitrogen (N) and potassium (K) fertilizers on the growth, total phenolic and flavonoid content (TPC and TFC), and antioxidant activity was investigated in different extracts of E. palmifolia. The treatments included 0, 46 or 92 kg/ha of N combined with 12.5 kg/ha of K, and 0, 25 or 50 kg/ha of K combined with 46 kg/ha of N. Using water, ethanol, or n-hexane as solvents, each sample was extracted with sonication method. TPC and TFC of the bulb extracts were quantified using Folin-Ciocalteu and aluminum chloride assays, respectively. Antioxidant activity was analyzed using 2, 2′-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Results showed that combining N and K had no significant effects on plant height, the number of tillers, leaves, or bulbs, and bulb diameter, while the chlorophyll reading value, total plant weight, and fresh bulb weight were significantly increased. The results indicated that the availability of N and K has a substantial effect on TPC, TFC, and antioxidant activity. The aqueous extract had the highest TPC and DPPH scavenging activity, whereas the ethanol extract exhibited the highest TFC and antioxidant FRAP activity. Therefore, to improve fresh bulb weight, phenol and flavonoid content, and antioxidant properties of E. palmifolia aqueous and ethanol extracts, supplementation of 46 kg/ha N and 12.5 kg/ha K is recommended.
{"title":"Effect of nitrogen and potassium application on growth, total phenolic, flavonoid contents, and antioxidant activity of Eleutherine palmifolia","authors":"M. Marlin, M. Simarmata, U. Salamah, W. Nurcholis","doi":"10.3934/agrfood.2022036","DOIUrl":"https://doi.org/10.3934/agrfood.2022036","url":null,"abstract":"Eleutherine palmifolia is one of the medicinal plants widely used by the Dayak and Kutai tribes in Borneo Island, Indonesia as traditional medicines that can treat various diseases. Identification of the phytochemical content of E. palmifolia is very important to determine its potential as a medicinal plant. A significant factor in the success of the growth of E. palmifolia is the amount of fertilizer applied as a source of nutrients. In this study, the influence of various amounts of nitrogen (N) and potassium (K) fertilizers on the growth, total phenolic and flavonoid content (TPC and TFC), and antioxidant activity was investigated in different extracts of E. palmifolia. The treatments included 0, 46 or 92 kg/ha of N combined with 12.5 kg/ha of K, and 0, 25 or 50 kg/ha of K combined with 46 kg/ha of N. Using water, ethanol, or n-hexane as solvents, each sample was extracted with sonication method. TPC and TFC of the bulb extracts were quantified using Folin-Ciocalteu and aluminum chloride assays, respectively. Antioxidant activity was analyzed using 2, 2′-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Results showed that combining N and K had no significant effects on plant height, the number of tillers, leaves, or bulbs, and bulb diameter, while the chlorophyll reading value, total plant weight, and fresh bulb weight were significantly increased. The results indicated that the availability of N and K has a substantial effect on TPC, TFC, and antioxidant activity. The aqueous extract had the highest TPC and DPPH scavenging activity, whereas the ethanol extract exhibited the highest TFC and antioxidant FRAP activity. Therefore, to improve fresh bulb weight, phenol and flavonoid content, and antioxidant properties of E. palmifolia aqueous and ethanol extracts, supplementation of 46 kg/ha N and 12.5 kg/ha K is recommended.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Groundnut is an important crop grown by smallholder farmers in West Africa for both domestic and market consumption. In groundnut cultivation, earthing up, or covering the plant's base and lower nodes with soil, is a common practice. However, there is no consistent evidence about its economic benefit. From 2016 to 2018, a three-year experiment was conducted to assess the benefits of earthing up and establish the best time to do so to increase groundnut yield, thus filling a knowledge gap in the region. The experiment was set up in a split-plot design, with the planting arrangement as the main plot (ridge vs flatbed planting) and the timing of earthing up as the subplot. The earthing up timing was divided into ten treatments, ranging from no earthing up (control) to earthing up at 70 days after planting. Data was collected on the number of matured pods per plant, dry pod yield, dry haulm yield, shelling percentage, and 100 seeds weight. The results for the time of earthing up revealed that there was no statistically significant difference in dry pod yield and dry haulm yield except in 2017. Similarly, for the number of matured pods per plant, 100 seeds weight, and shelling percentage, there was no statistically significant difference between times of earthing up except for 100 seeds weight in 2018 and shelling percentage in 2017 and 2018. The individual years and combined analyses across years revealed no statistically significant difference between the main plots for all the five traits. The combined analysis for the times of earthing up showed a significant difference only for shelling percentage. Therefore, in the Sudan Savanah agro-climatic conditions of the semi-arid tropics of West Africa, earthing up may not be economically beneficial during a typical rainfall season with appropriate planting time. Instead, it could raise production costs, reducing the profit.
{"title":"Impact of earthing up on groundnut (Arachis hypogaea L.) pod yield and its components","authors":"H. Desmae, D. Sako, D. Konaté","doi":"10.3934/agrfood.2022038","DOIUrl":"https://doi.org/10.3934/agrfood.2022038","url":null,"abstract":"Groundnut is an important crop grown by smallholder farmers in West Africa for both domestic and market consumption. In groundnut cultivation, earthing up, or covering the plant's base and lower nodes with soil, is a common practice. However, there is no consistent evidence about its economic benefit. From 2016 to 2018, a three-year experiment was conducted to assess the benefits of earthing up and establish the best time to do so to increase groundnut yield, thus filling a knowledge gap in the region. The experiment was set up in a split-plot design, with the planting arrangement as the main plot (ridge vs flatbed planting) and the timing of earthing up as the subplot. The earthing up timing was divided into ten treatments, ranging from no earthing up (control) to earthing up at 70 days after planting. Data was collected on the number of matured pods per plant, dry pod yield, dry haulm yield, shelling percentage, and 100 seeds weight. The results for the time of earthing up revealed that there was no statistically significant difference in dry pod yield and dry haulm yield except in 2017. Similarly, for the number of matured pods per plant, 100 seeds weight, and shelling percentage, there was no statistically significant difference between times of earthing up except for 100 seeds weight in 2018 and shelling percentage in 2017 and 2018. The individual years and combined analyses across years revealed no statistically significant difference between the main plots for all the five traits. The combined analysis for the times of earthing up showed a significant difference only for shelling percentage. Therefore, in the Sudan Savanah agro-climatic conditions of the semi-arid tropics of West Africa, earthing up may not be economically beneficial during a typical rainfall season with appropriate planting time. Instead, it could raise production costs, reducing the profit.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Large amounts of solid wastes such as spent coffee grounds (SCGs) from brewing provide a valuable sugar source to investigate. The effects on the sugar properties of extraction factors were studied. Different solvent extractions using an autoclave showed distinguishable sugar contents and properties. Water extracted the highest total sugar content while alkali extracted the highest total phenolic content (TPC). The ultrasonic-water-bath-assisted extraction with water did not produce any significant content or TPC. Finally, the combination of ultrasonic-autoclave-assisted extraction with water at 40% amplitude for 10 min produced the highest total sugar content and TPC, similar to that found in samples from the autoclave extraction with water. The FT-IR spectra of SCGs sugar revealed both amorphous and crystalline structures. All sugar extracts from SCGs contained phosphorus, potassium and calcium as the main mineral elements. Thus, sugar extracts from SCGs can be considered as an alternative additive with a good TPC for food products.
{"title":"Different novel extraction techniques on chemical and functional properties of sugar extracts from spent coffee grounds","authors":"Namfon Samsalee, R. Sothornvit","doi":"10.3934/agrfood.2022055","DOIUrl":"https://doi.org/10.3934/agrfood.2022055","url":null,"abstract":"Large amounts of solid wastes such as spent coffee grounds (SCGs) from brewing provide a valuable sugar source to investigate. The effects on the sugar properties of extraction factors were studied. Different solvent extractions using an autoclave showed distinguishable sugar contents and properties. Water extracted the highest total sugar content while alkali extracted the highest total phenolic content (TPC). The ultrasonic-water-bath-assisted extraction with water did not produce any significant content or TPC. Finally, the combination of ultrasonic-autoclave-assisted extraction with water at 40% amplitude for 10 min produced the highest total sugar content and TPC, similar to that found in samples from the autoclave extraction with water. The FT-IR spectra of SCGs sugar revealed both amorphous and crystalline structures. All sugar extracts from SCGs contained phosphorus, potassium and calcium as the main mineral elements. Thus, sugar extracts from SCGs can be considered as an alternative additive with a good TPC for food products.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study assesses the impact of the live sheep export trade on the South African economy. The study used a recent South African Social Accounting Matrix and a partial equilibrium model. The results are mixed. On a positive note, the higher the demand for live sheep exports, the higher the prices and the more significant the economic impact. On the other hand, South Africa loses value-adding opportunities such as output from abattoirs, including hides and skin, offal, head, and consumable internal organs, and employment when live lambs are exported and slaughtered in destination markets. These findings help policymakers to develop appropriate mitigation strategies to balance the advantages and disadvantages of live sheep export. A nationwide analysis may miss some of the local costs and benefits of live sheep exports. Future research can also be done in selected major areas that produce sheep in South Africa.
{"title":"The impact of live sheep export trade on the South Africa economy","authors":"F. Maré, Y. T. Bahta","doi":"10.3934/agrfood.2023002","DOIUrl":"https://doi.org/10.3934/agrfood.2023002","url":null,"abstract":"The study assesses the impact of the live sheep export trade on the South African economy. The study used a recent South African Social Accounting Matrix and a partial equilibrium model. The results are mixed. On a positive note, the higher the demand for live sheep exports, the higher the prices and the more significant the economic impact. On the other hand, South Africa loses value-adding opportunities such as output from abattoirs, including hides and skin, offal, head, and consumable internal organs, and employment when live lambs are exported and slaughtered in destination markets. These findings help policymakers to develop appropriate mitigation strategies to balance the advantages and disadvantages of live sheep export. A nationwide analysis may miss some of the local costs and benefits of live sheep exports. Future research can also be done in selected major areas that produce sheep in South Africa.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70183325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hesti Kurniasari, W. David, Laras Cempaka, Ardiansyah
Ginger is a spice with various uses for humans, such as flavoring agents and nutraceuticals. Drying is commonly used in the processing and preserving of ginger and affects the characteristics of the final ginger product. This study aimed to review the studies that have evaluated the effects of drying techniques on the bioactivity of ginger. A meta-analysis investigation was conducted to identify a study that evaluated the effects of drying techniques on the levels of bioactivity in ginger. The database search found 113 results. There are 13 articles from 2010 to 2020 that met the inclusion criteria. The drying techniques have different effects on the optimum levels of ginger characteristics. After drying treatment there were significant different on total flavonoid and antioxidant activity and there were not significant on total phenolic content and 6-gingerol content of ginger. In conclusion, drying has different effects on ginger in terms of bioactivity. Therefore, choosing the best method must be made based on the purpose of the process and the final product criteria.
{"title":"Effects of drying techniques on bioactivity of ginger (Zingiber officinale): A meta-analysis investigation","authors":"Hesti Kurniasari, W. David, Laras Cempaka, Ardiansyah","doi":"10.3934/agrfood.2022013","DOIUrl":"https://doi.org/10.3934/agrfood.2022013","url":null,"abstract":"Ginger is a spice with various uses for humans, such as flavoring agents and nutraceuticals. Drying is commonly used in the processing and preserving of ginger and affects the characteristics of the final ginger product. This study aimed to review the studies that have evaluated the effects of drying techniques on the bioactivity of ginger. A meta-analysis investigation was conducted to identify a study that evaluated the effects of drying techniques on the levels of bioactivity in ginger. The database search found 113 results. There are 13 articles from 2010 to 2020 that met the inclusion criteria. The drying techniques have different effects on the optimum levels of ginger characteristics. After drying treatment there were significant different on total flavonoid and antioxidant activity and there were not significant on total phenolic content and 6-gingerol content of ginger. In conclusion, drying has different effects on ginger in terms of bioactivity. Therefore, choosing the best method must be made based on the purpose of the process and the final product criteria.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70182355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Pappa, E. Kondyli, A. Vlachou, A. Kakouri, E. Malamou, J. Samelis
Tsalafouti is a fermented dairy product produced from 'boiled', naturally acidified sheep milk during summer (end of lactation period) as a farmhouse product. As consumer's demand is regular throughout the year, a semi-industrial production method of Tsalafouti was investigated based on the artisanal processing method aided with the use of a commercial multi-strain Lactococcus lactis starter culture for optimal milk acidification. Main physicochemical and microbiological characteristics, level of proteolysis and volatile compounds of the new product were determined. The semi-industrial Tsalafouti had smooth firm texture, mild sour taste, pleasant aroma, and received high panel-sensory scores up to day 45 of storage; afterward, the product developed an unpleasant flavor. The ripened (day 30) product had pH 4.28, moisture 81.5%, fat 6%, fat-in-dry matter 32.53%, salt 0.33% and proteins 5.49%, and contained high levels of heptanal, acetone, hexanal and 3-methyl butanal. The Lc. lactis starter (4 strain biotypes) grew abundantly (>9 log CFU/g) and acidified the milk within the first 10 days of ripening at 10 ℃. Viable starter cell populations declined significantly during late ripening and storage, probably due to autolysis. No growth of thermophilic streptococci, mesophilic non-starter lactobacilli or leuconostoc-like bacteria, enterococci, staphylococci, coliform bacteria and yeasts occurred during ripening. Only spoilage molds grew on the product surface after 45 to 60 days of aerobic storage at 2-4 ℃. The present data may contribute to the industrial production of Tsalafouti, giving an added value to this traditional Greek dairy product.
{"title":"Semi industrial production of Tsalafouti dairy product","authors":"E. Pappa, E. Kondyli, A. Vlachou, A. Kakouri, E. Malamou, J. Samelis","doi":"10.3934/agrfood.2022028","DOIUrl":"https://doi.org/10.3934/agrfood.2022028","url":null,"abstract":"Tsalafouti is a fermented dairy product produced from 'boiled', naturally acidified sheep milk during summer (end of lactation period) as a farmhouse product. As consumer's demand is regular throughout the year, a semi-industrial production method of Tsalafouti was investigated based on the artisanal processing method aided with the use of a commercial multi-strain Lactococcus lactis starter culture for optimal milk acidification. Main physicochemical and microbiological characteristics, level of proteolysis and volatile compounds of the new product were determined. The semi-industrial Tsalafouti had smooth firm texture, mild sour taste, pleasant aroma, and received high panel-sensory scores up to day 45 of storage; afterward, the product developed an unpleasant flavor. The ripened (day 30) product had pH 4.28, moisture 81.5%, fat 6%, fat-in-dry matter 32.53%, salt 0.33% and proteins 5.49%, and contained high levels of heptanal, acetone, hexanal and 3-methyl butanal. The Lc. lactis starter (4 strain biotypes) grew abundantly (>9 log CFU/g) and acidified the milk within the first 10 days of ripening at 10 ℃. Viable starter cell populations declined significantly during late ripening and storage, probably due to autolysis. No growth of thermophilic streptococci, mesophilic non-starter lactobacilli or leuconostoc-like bacteria, enterococci, staphylococci, coliform bacteria and yeasts occurred during ripening. Only spoilage molds grew on the product surface after 45 to 60 days of aerobic storage at 2-4 ℃. The present data may contribute to the industrial production of Tsalafouti, giving an added value to this traditional Greek dairy product.","PeriodicalId":44793,"journal":{"name":"AIMS Agriculture and Food","volume":"1 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70182358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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