Strawberry is a very nutritious but highly perishable fruit, which require appropriate technology to maintain postharvest quality. An experiment was conducted to develop a safe technology for extension of shelf life and quality retention of strawberry using calyx retention and organic extracts. The experiment consisted of two-factors: Factor A: Calyx retention, viz. without calyx and peduncle (P0), calyx with peduncle (P1), and calyx without peduncle (P2), and Factor B: Organic extracts viz., control (T0), garlic extract @ 1:1 (T1), aloe vera extract @ 1% (T2), and chitosan coating 0.2% (T3). The experiment was laid out in completely randomized design with three replications. Results revealed that combined treatment of calyx with peduncle and edible garlic extracts showed best external appearance among the treatments. The maximum weight loss (26.51%) was recorded in calyx with peduncle plus control, while the minimum weight loss (16.41%) was found from calyx with peduncle plus garlic extract. The maximum TSS content (8.69%), disease incidence (55.54%) and severity (33.38%) were recorded in without calyx and peduncle plus control, while the minimum TSS content (6.87%), disease incidence (9.26%) and severity (5.40%) were observed in calyx with peduncle plus garlic extract, respectively. The longest shelf life (6.67 days) was obtained from calyx with peduncle plus garlic extracts, while the shortest shelf life was found from without calyx and peduncle plus control. Therefore, combined treatment of calyx with peduncle plus garlic extract was found to be better in respect of reducing postharvest diseases, shelf life prolongation and quality retention of strawberry.
{"title":"Effects of calyx retention and organic extracts on shelf life and quality of strawberry (Fragaria × ananassa Duch.)","authors":"Sadia Sultana, M. Rashid, M. Hassan","doi":"10.5455/jbau.120470","DOIUrl":"https://doi.org/10.5455/jbau.120470","url":null,"abstract":"Strawberry is a very nutritious but highly perishable fruit, which require appropriate technology to maintain postharvest quality. An experiment was conducted to develop a safe technology for extension of shelf life and quality retention of strawberry using calyx retention and organic extracts. The experiment consisted of two-factors: Factor A: Calyx retention, viz. without calyx and peduncle (P0), calyx with peduncle (P1), and calyx without peduncle (P2), and Factor B: Organic extracts viz., control (T0), garlic extract @ 1:1 (T1), aloe vera extract @ 1% (T2), and chitosan coating 0.2% (T3). The experiment was laid out in completely randomized design with three replications. Results revealed that combined treatment of calyx with peduncle and edible garlic extracts showed best external appearance among the treatments. The maximum weight loss (26.51%) was recorded in calyx with peduncle plus control, while the minimum weight loss (16.41%) was found from calyx with peduncle plus garlic extract. The maximum TSS content (8.69%), disease incidence (55.54%) and severity (33.38%) were recorded in without calyx and peduncle plus control, while the minimum TSS content (6.87%), disease incidence (9.26%) and severity (5.40%) were observed in calyx with peduncle plus garlic extract, respectively. The longest shelf life (6.67 days) was obtained from calyx with peduncle plus garlic extracts, while the shortest shelf life was found from without calyx and peduncle plus control. Therefore, combined treatment of calyx with peduncle plus garlic extract was found to be better in respect of reducing postharvest diseases, shelf life prolongation and quality retention of strawberry.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81593554","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}
In spite of the great potentials of fish hatchery enterprise, factors such as low technical know-how and high cost of fish hatchery inputs have limited the contribution of the enterprise in enhancing food security. Also, inefficiency of available resources has remained an unanswered question in the quest for increasing fish production in Nigeria. This study therefore estimated the technical efficiency of fish hatchery enterprise in Osun State Nigeria using data envelopment analysis and multiple regression analysis. A multi‑stage sampling procedure was employed to select 227 fish hatchery farmers from three agricultural zones in the study area. Findings showed that technical efficiency varied from 0.36 to 0.97, with a mean of 0.75. These varying indices of efficiency in the fish hatchery enterprises indicate great potential to achieve productivity growth through improved efficiency, using existing technologies. Results of the multiple regression indicated that age, household size, level of education, fish hatchery experience and access to credit were significant and positively related to technical efficiency. These results suggest that increase in fish hatchery experience and access to credit could jointly contribute to an improvement in efficiency of fish hatchery production in the study area. Fish hatchery farmers should explore the opportunity of cooperative associations to pool resources together by organizing seminars/workshops on improved innovations in relation to fish hatchery business so as to improve efficiency of the enterprise.
{"title":"Analysis of Technical Efficiency of Fish Hatchery Enterprises in Osun State, Nigeria: an application of Two-stage DEA approach","authors":"Samuel dejo","doi":"10.5455/jbau.5351","DOIUrl":"https://doi.org/10.5455/jbau.5351","url":null,"abstract":"In spite of the great potentials of fish hatchery enterprise, factors such as low technical know-how and high cost of fish hatchery inputs have limited the contribution of the enterprise in enhancing food security. Also, inefficiency of available resources has remained an unanswered question in the quest for increasing fish production in Nigeria. This study therefore estimated the technical efficiency of fish hatchery enterprise in Osun State Nigeria using data envelopment analysis and multiple regression analysis. A multi‑stage sampling procedure was employed to select 227 fish hatchery farmers from three agricultural zones in the study area. Findings showed that technical efficiency varied from 0.36 to 0.97, with a mean of 0.75. These varying indices of efficiency in the fish hatchery enterprises indicate great potential to achieve productivity growth through improved efficiency, using existing technologies. Results of the multiple regression indicated that age, household size, level of education, fish hatchery experience and access to credit were significant and positively related to technical efficiency. These results suggest that increase in fish hatchery experience and access to credit could jointly contribute to an improvement in efficiency of fish hatchery production in the study area. Fish hatchery farmers should explore the opportunity of cooperative associations to pool resources together by organizing seminars/workshops on improved innovations in relation to fish hatchery business so as to improve efficiency of the enterprise.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84212576","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}
R. Liza, Jamia Ismita, K. Islam, R. Chowdhury, M. Debi, Naimur Joy
{"title":"Effects of yeast (Saccharomyces cereviciae) fermented rice bran with urea on the production performance of broiler.","authors":"R. Liza, Jamia Ismita, K. Islam, R. Chowdhury, M. Debi, Naimur Joy","doi":"10.5455/jbau.130284","DOIUrl":"https://doi.org/10.5455/jbau.130284","url":null,"abstract":"","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72570944","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}
M. Rahman, M. Islam, F. Zaman, Suriaya Parveen, A. Hasan
Weed control is important in obtaining optimum kenaf fibre yields. An experiment was conducted during April to September, 2015 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to evaluate the effect of two pre- and two post-emergence herbicides on weed control, growth and yield performance of kenaf. Nine treatment combinations involving two pre-emergence herbicides (Panida and Commit), two post-emergence herbicides (Quilop and Pyzero) and hand weeding were taken as treatments; and the treatments were - T1 = No weeding, T2 = Hand weeding, T3 = Panida, T4 = Commit, T5 = Panida + Quilop, T6 = Commit + Quilop, T7 = Panida + Pyzero, T8 = Commit + Pyzero, T9 = Panida + Hand weeding. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The pre-emergence herbicides were applied at 2 days after sowing (DAS) while post-emergence herbicides were applied at 25 DAS at their recommended doses. The hand weeding was done at 25 DAS. The result revealed that the treatment T6 (Commit + Quilop) showed the best control of weeds as reflected by the lowest weed density and dry matter. Most of the yield contributing characters was found highest at the treatment T6 (Commit + Quilop). The present study concludes that the best weed control in kenaf could be achieved by applying Commit at 2 DAS followed by Quilop at 25 DAS.
{"title":"Effect of Herbicides on Weed Infestation, Growth and Yield of Kenaf (Hibiscus cannabinus L.)","authors":"M. Rahman, M. Islam, F. Zaman, Suriaya Parveen, A. Hasan","doi":"10.5455/jbau.120549","DOIUrl":"https://doi.org/10.5455/jbau.120549","url":null,"abstract":"Weed control is important in obtaining optimum kenaf fibre yields. An experiment was conducted during April to September, 2015 at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to evaluate the effect of two pre- and two post-emergence herbicides on weed control, growth and yield performance of kenaf. Nine treatment combinations involving two pre-emergence herbicides (Panida and Commit), two post-emergence herbicides (Quilop and Pyzero) and hand weeding were taken as treatments; and the treatments were - T1 = No weeding, T2 = Hand weeding, T3 = Panida, T4 = Commit, T5 = Panida + Quilop, T6 = Commit + Quilop, T7 = Panida + Pyzero, T8 = Commit + Pyzero, T9 = Panida + Hand weeding. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The pre-emergence herbicides were applied at 2 days after sowing (DAS) while post-emergence herbicides were applied at 25 DAS at their recommended doses. The hand weeding was done at 25 DAS. The result revealed that the treatment T6 (Commit + Quilop) showed the best control of weeds as reflected by the lowest weed density and dry matter. Most of the yield contributing characters was found highest at the treatment T6 (Commit + Quilop). The present study concludes that the best weed control in kenaf could be achieved by applying Commit at 2 DAS followed by Quilop at 25 DAS.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79463651","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}
Shrimp culture has become a part and parcel for continuing sustainable livelihood of the farmers in the coastal villages of Bangladesh. This study aimed to optimize stocking density for a disease-free and profitable Indian white shrimp (Penaeus indicus) farming. The experiment was conducted under three treatments each with three replications. Stocking density of 10 individuals m-2 was considered as treatment one (T1), 20 individuals m-2 as treatment two (T2) and 30 individuals m-2 as treatment three (T3) for farming Indian white shrimp. Generally, all the water quality parameters of the experimental ponds except the salinity were found within the optimum condition for Indian white shrimp culture. In modified extensive shrimp farming (MESF) system, T2 showed higher survival rate than any other treatments at a low salinity level. Besides, total production values were revealed very tiny gap between T2 and T3. Though the highest value of production was found in T3 but survival rate was lower than T2. Moreover, values of shrimp’s average body weight (ABW), daily weight gain (DWG), and specific growth rate (SGR) were the highest in T2. During 90 days of culture, the growth of the Indian shrimp was negative allometric (2.86), which value was about to the value (3.00) of isomerism. This study recommends MESF culture system for growing Indian white shrimp for a greater output in brackishwater farms. This investigation also suggests some future research by considering MESF system for other important indigenous shrimp species.
{"title":"Mariculture of Indian white shrimp Penaeus indicus (H. Milne Edwards): Optimization of stocking density in modified extensive shrimp farming (MESF) system","authors":"Shawon Ahmmed, M. Sakib, M. Islam","doi":"10.5455/jbau.119314","DOIUrl":"https://doi.org/10.5455/jbau.119314","url":null,"abstract":"Shrimp culture has become a part and parcel for continuing sustainable livelihood of the farmers in the coastal villages of Bangladesh. This study aimed to optimize stocking density for a disease-free and profitable Indian white shrimp (Penaeus indicus) farming. The experiment was conducted under three treatments each with three replications. Stocking density of 10 individuals m-2 was considered as treatment one (T1), 20 individuals m-2 as treatment two (T2) and 30 individuals m-2 as treatment three (T3) for farming Indian white shrimp. Generally, all the water quality parameters of the experimental ponds except the salinity were found within the optimum condition for Indian white shrimp culture. In modified extensive shrimp farming (MESF) system, T2 showed higher survival rate than any other treatments at a low salinity level. Besides, total production values were revealed very tiny gap between T2 and T3. Though the highest value of production was found in T3 but survival rate was lower than T2. Moreover, values of shrimp’s average body weight (ABW), daily weight gain (DWG), and specific growth rate (SGR) were the highest in T2. During 90 days of culture, the growth of the Indian shrimp was negative allometric (2.86), which value was about to the value (3.00) of isomerism. This study recommends MESF culture system for growing Indian white shrimp for a greater output in brackishwater farms. This investigation also suggests some future research by considering MESF system for other important indigenous shrimp species.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87139694","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}
M. Taher, M. Rahman, K. Islam, Mohammad Monir Uddin
The bagging of fruits is widely used to provide a physical barrier between the fruits and insect pests. Litchi can easily be bagged to keep them safe from oviposition of litchi fruit borer, Conopomorpha sinensis Bradley (Lepidoptera: Gracillariidae). Efficacies of different bagging alone or in combination with insecticides were evaluated against the control trees in a commercial litchi orchard in Bangladesh. The study consisted of five treatments: mosquito net sheets, mosquito net bags, white waxed-paper bags, mosquito net bags combined with Novastar 56 EC (bifenthrin + abamectin) and mosquito net bags combined with neem leaf extracts. Treatments were set at 10, 20 and 30 days after fruit settings (DAFS). Regardless of the bagging method and setting times, all the treatments significantly reduced C. sinensis infestations compared to the control trees. Earlier bagging of fruits (within the 10 days of fruit settings) provided the best protection (100%) from C. sinensis infestations. In the cases of later bagging of fruits (at 20 and 30 DAFS), better defences against C. sinensis were found from the white waxed-paper bagging and mosquito net bags + Novastar 56 EC treatments. Irrespective of the bagging times, higher pest-free fruits (>95%) and benefit-cost ratios (BCR) were achieved from the bagging with white waxed-paper bags (8.25:1) and the mosquito net bags + Novastar 56 EC (5.18:1). Among the treatments, the mosquito net bags, or sheets were less effective. However, mosquito net bags combined with neem leaf extracts provided better outcomes. Therefore, bagging fruits within 10 days of fruit settings can be recommended for better protection. For the delayed bagging, white waxed-paper bags or the mosquito net bags in combination with Novastar 56 EC (preferred) or neem leaf extracts might be suggested.
{"title":"Efficacy of different bagging techniques for the management of litchi fruit borer (Conopomorpha sinensis)","authors":"M. Taher, M. Rahman, K. Islam, Mohammad Monir Uddin","doi":"10.5455/jbau.51435","DOIUrl":"https://doi.org/10.5455/jbau.51435","url":null,"abstract":"The bagging of fruits is widely used to provide a physical barrier between the fruits and insect pests. Litchi can easily be bagged to keep them safe from oviposition of litchi fruit borer, Conopomorpha sinensis Bradley (Lepidoptera: Gracillariidae). Efficacies of different bagging alone or in combination with insecticides were evaluated against the control trees in a commercial litchi orchard in Bangladesh. The study consisted of five treatments: mosquito net sheets, mosquito net bags, white waxed-paper bags, mosquito net bags combined with Novastar 56 EC (bifenthrin + abamectin) and mosquito net bags combined with neem leaf extracts. Treatments were set at 10, 20 and 30 days after fruit settings (DAFS). Regardless of the bagging method and setting times, all the treatments significantly reduced C. sinensis infestations compared to the control trees. Earlier bagging of fruits (within the 10 days of fruit settings) provided the best protection (100%) from C. sinensis infestations. In the cases of later bagging of fruits (at 20 and 30 DAFS), better defences against C. sinensis were found from the white waxed-paper bagging and mosquito net bags + Novastar 56 EC treatments. Irrespective of the bagging times, higher pest-free fruits (>95%) and benefit-cost ratios (BCR) were achieved from the bagging with white waxed-paper bags (8.25:1) and the mosquito net bags + Novastar 56 EC (5.18:1). Among the treatments, the mosquito net bags, or sheets were less effective. However, mosquito net bags combined with neem leaf extracts provided better outcomes. Therefore, bagging fruits within 10 days of fruit settings can be recommended for better protection. For the delayed bagging, white waxed-paper bags or the mosquito net bags in combination with Novastar 56 EC (preferred) or neem leaf extracts might be suggested.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85987380","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 alarming trend of the resistance in microbes drives researchers to re-evaluate the existing materials and methods used to maintain aseptic conditions in laboratories. Therefore, this study was designed to better understand surface microbes in biotechnology laboratory areas that may develop resistance and the action needed to control the transmission by re-evaluating the efficiency of commonly used surface sterilant: 70% ethanol. For this purpose, surface swabs were collected from the four commonly used uncleaned working spots: media preparation area, molecular area, inoculation area, and incubation area. Pure colonies were characterised morphologically and biochemically using gram staining, catalase, oxidase, indole, urase, and gelatin tests. According to morphological and biochemical characteristics, the representative bacteria were concluded as Bacillus spp., from media preparation and molecular area, Staphylococcus spp., and Pseudomonas spp, from inoculation and incubation area, respectively. All the isolates were sensitive to the antibiotic Kanamycin. Then these isolated bacteria were used as surface inoculum to find the efficacy of 70% ethanol as surface steriliser after 2, 5, and 10 mins of sterilisation. After sterilisation, the bacteria concentration was 8-11 times lower than the positive control, and there were no significant differences (α=0.01) among negative and tested bacteria samples in bacterial concentration and times used. This study also tested whether ethanol is effective against surface bacteria for up to 24 hours and concluded that there is a need for immediate cleaning. Overall, this study confirmed the acceptability of the most undertaken sterilisation practice (using 70% ethanol) at biotechnology laboratories using isolated surface bacteria.
{"title":"Efficacy of commonly used sterilant 70% (w/v) ethanol in controlling identified surface microbes in biotechnology laboratory","authors":"S. Saha, Shah Mahinoor, S. Yasmin, F. Meem","doi":"10.5455/jbau.96568","DOIUrl":"https://doi.org/10.5455/jbau.96568","url":null,"abstract":"The alarming trend of the resistance in microbes drives researchers to re-evaluate the existing materials and methods used to maintain aseptic conditions in laboratories. Therefore, this study was designed to better understand surface microbes in biotechnology laboratory areas that may develop resistance and the action needed to control the transmission by re-evaluating the efficiency of commonly used surface sterilant: 70% ethanol. For this purpose, surface swabs were collected from the four commonly used uncleaned working spots: media preparation area, molecular area, inoculation area, and incubation area. Pure colonies were characterised morphologically and biochemically using gram staining, catalase, oxidase, indole, urase, and gelatin tests. According to morphological and biochemical characteristics, the representative bacteria were concluded as Bacillus spp., from media preparation and molecular area, Staphylococcus spp., and Pseudomonas spp, from inoculation and incubation area, respectively. All the isolates were sensitive to the antibiotic Kanamycin. Then these isolated bacteria were used as surface inoculum to find the efficacy of 70% ethanol as surface steriliser after 2, 5, and 10 mins of sterilisation. After sterilisation, the bacteria concentration was 8-11 times lower than the positive control, and there were no significant differences (α=0.01) among negative and tested bacteria samples in bacterial concentration and times used. This study also tested whether ethanol is effective against surface bacteria for up to 24 hours and concluded that there is a need for immediate cleaning. Overall, this study confirmed the acceptability of the most undertaken sterilisation practice (using 70% ethanol) at biotechnology laboratories using isolated surface bacteria.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78064075","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}
One of the most popular climacteric fruits, tomatoes contain numerous nutrients that are essential to human nutrition, including vitamins, minerals, lycopene, beta-carotene, and other bioactive substances. Due to a lack of appropriate processing technique, a large amount of postharvest loss is usually experienced every year as it is a highly perishable vegetable. This study aims to increase the shelf life and quality of three tomato varieties (BARI Tomato-8, BARI Tomato-10, and BARI Tomato-11). Firstly, chemical analysis (pH, TSS, titrable acidity) of prepared aloe vera gel (AVG) along with antioxidant properties was determined. Then three tomato varieties were coated with aloe vera gel (AVG), sodium benzoate (SB), the combination of aloe vera gel and sodium benzoate, and without any coating considered as control. Treated samples were then analyzed for pH, TSS, weight loss, titratable acidity, and antioxidative activities during storage. Treated samples (10% AVG, 3% SB solution, and 3% SB +10% AVG) showed a gradual increase in pH, TSS, weight loss, and a decrease in the titratable acidity as well induced antioxidative activities differently during storage in comparison with the control one. The antioxidant capacity was calculated up to 78.25 % for 10% Aloe vera gel treated samples while aloe vera gel had 15.22% radical scavenging activity (RSA). In all tomato varieties, more than 50% DPPH radical inhibition had been observed for most of the treatment groups except 3% SB after 21 days of storage. Overall, 3% SB mixed with 10% AVG showed the best results among the four treatments.
{"title":"EFFECTS OF ALOE VERA GEL AND SODIUM BENZOATE ON QUALITY AND SHELF LIFE OF TOMATO VARIETIES","authors":"M. Das, F. Akter, M. Islam, M. Alim, M. Biswas","doi":"10.5455/jbau.116964","DOIUrl":"https://doi.org/10.5455/jbau.116964","url":null,"abstract":"One of the most popular climacteric fruits, tomatoes contain numerous nutrients that are essential to human nutrition, including vitamins, minerals, lycopene, beta-carotene, and other bioactive substances. Due to a lack of appropriate processing technique, a large amount of postharvest loss is usually experienced every year as it is a highly perishable vegetable. This study aims to increase the shelf life and quality of three tomato varieties (BARI Tomato-8, BARI Tomato-10, and BARI Tomato-11). Firstly, chemical analysis (pH, TSS, titrable acidity) of prepared aloe vera gel (AVG) along with antioxidant properties was determined. Then three tomato varieties were coated with aloe vera gel (AVG), sodium benzoate (SB), the combination of aloe vera gel and sodium benzoate, and without any coating considered as control. Treated samples were then analyzed for pH, TSS, weight loss, titratable acidity, and antioxidative activities during storage. Treated samples (10% AVG, 3% SB solution, and 3% SB +10% AVG) showed a gradual increase in pH, TSS, weight loss, and a decrease in the titratable acidity as well induced antioxidative activities differently during storage in comparison with the control one. The antioxidant capacity was calculated up to 78.25 % for 10% Aloe vera gel treated samples while aloe vera gel had 15.22% radical scavenging activity (RSA). In all tomato varieties, more than 50% DPPH radical inhibition had been observed for most of the treatment groups except 3% SB after 21 days of storage. Overall, 3% SB mixed with 10% AVG showed the best results among the four treatments.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90665682","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}
M. Hoque, Md.Sayed Ali, M. Miah, M. Karim, M. Hossain
Sunflower production is increasing in Bangladesh, but farmers face problems separating the seeds from the sunflower heads. Sunflowers are traditionally threshed by beating the heads manually with a stick. The goal of this experiment is to design and develop a motor-driven machine that separates the seeds from the sunflower. An orthographic projection was drawn using SolidWorks 2016 software. The sunflower threshing machine was then fabricated according to the drawing in the FMPE Divisional workshop using locally available materials in 2017-18. The developed sunflower threshing machine was modified in 2018-19. The improved model was further modified to reduce the overall dimensions while maintaining the same capacity of the machine. The number of threshing rollers was reduced from 5 to 4. A threshing fan has been added to the improved version to separate the dust from the grains. The capacity of the motorized sunflower thresher was 115 and 304% higher than that of the pedal thresher and manual threshing, respectively. The capacity of the thresher was varied with moisture content. The capacity of the thresher varied from 89 to 125 kg/h at moisture content from 31 to 62% (wb).
{"title":"Design and Development of a Power Operated Sunflower Thresher","authors":"M. Hoque, Md.Sayed Ali, M. Miah, M. Karim, M. Hossain","doi":"10.5455/jbau.34785","DOIUrl":"https://doi.org/10.5455/jbau.34785","url":null,"abstract":"Sunflower production is increasing in Bangladesh, but farmers face problems separating the seeds from the sunflower heads. Sunflowers are traditionally threshed by beating the heads manually with a stick. The goal of this experiment is to design and develop a motor-driven machine that separates the seeds from the sunflower. An orthographic projection was drawn using SolidWorks 2016 software. The sunflower threshing machine was then fabricated according to the drawing in the FMPE Divisional workshop using locally available materials in 2017-18. The developed sunflower threshing machine was modified in 2018-19. The improved model was further modified to reduce the overall dimensions while maintaining the same capacity of the machine. The number of threshing rollers was reduced from 5 to 4. A threshing fan has been added to the improved version to separate the dust from the grains. The capacity of the motorized sunflower thresher was 115 and 304% higher than that of the pedal thresher and manual threshing, respectively. The capacity of the thresher was varied with moisture content. The capacity of the thresher varied from 89 to 125 kg/h at moisture content from 31 to 62% (wb).","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73331607","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}
Pteridophytes are the cryptogams having vascular bundles and are distributed all over the world. They are mostly neglected plants though they have versatile economic uses. The present study has been planned to prepare a primary documentation through taxonomic study of the Pteridophytes available in the Bangladesh Agricultural University Botanical Garden (BAUBG). Forty Pteridophyte species available in the BAUBG, Mymensingh were identified and those belong to 19 families have been documented. Among those 19 species appear to be not evaluated as those were not reported elsewhere in Bangladesh. A brief description of each species along with its family and uses has been presented in the text. A graphical presentation showing their classification and categories based on a few parameters has been provided for their easy understanding and identification.
{"title":"Pteridophytes (Ferns and Fern Allies) diversity in Bangladesh Agricultural University Botanical Garden","authors":"M. Jone, M. Ashrafuzzaman, M. Pramanik","doi":"10.5455/jbau.105308","DOIUrl":"https://doi.org/10.5455/jbau.105308","url":null,"abstract":"Pteridophytes are the cryptogams having vascular bundles and are distributed all over the world. They are mostly neglected plants though they have versatile economic uses. The present study has been planned to prepare a primary documentation through taxonomic study of the Pteridophytes available in the Bangladesh Agricultural University Botanical Garden (BAUBG). Forty Pteridophyte species available in the BAUBG, Mymensingh were identified and those belong to 19 families have been documented. Among those 19 species appear to be not evaluated as those were not reported elsewhere in Bangladesh. A brief description of each species along with its family and uses has been presented in the text. A graphical presentation showing their classification and categories based on a few parameters has been provided for their easy understanding and identification.","PeriodicalId":15283,"journal":{"name":"Journal of Bangladesh Agricultural University","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75863359","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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