Pub Date : 2021-12-30DOI: 10.21608/ajs.2021.75154.1374
K. Mahmoud, Medhat Mostafa Abozid, A. F. Abd El-Fattah
: Excessive exposure to lead may damage the liver by increasing oxidative stress, leading to many serious diseases. Dietary antioxidants may protect the liver from damage. Therefore, the effect of ethanolic and aqueous turmeric extracts against lead-induced liver damage was evaluated by esti-mating liver function and antioxidant/oxidative stress biomarkers. Forty rats were divided into group (A) served as control, group (B) treated with 93 mg/kg b.wt. lead nitrate, group (C) and group (D) treated as group B in addition to 400 mg/kg b.wt. of turmeric aqueous and ethanolic extracts, respec-tively. Group B showed a significant increase in the activities of alanine transaminase by 10 folds, aspartate transaminase by 9 folds, alkaline phosphatase by 3 folds and the level of malondialdehyde by 10 folds, while showed a significant decrease in albumin by 60%, total protein by 54.5%, and superoxide dismutase by 80.5%, catalase by 75% and glutathione by 71.6% in comparison with control group. On the
{"title":"Turmeric Extracts as a Protective Natural Compound Against Hepatotoxicity Induced by Lead Nitrate in Male Albino Rat Model","authors":"K. Mahmoud, Medhat Mostafa Abozid, A. F. Abd El-Fattah","doi":"10.21608/ajs.2021.75154.1374","DOIUrl":"https://doi.org/10.21608/ajs.2021.75154.1374","url":null,"abstract":": Excessive exposure to lead may damage the liver by increasing oxidative stress, leading to many serious diseases. Dietary antioxidants may protect the liver from damage. Therefore, the effect of ethanolic and aqueous turmeric extracts against lead-induced liver damage was evaluated by esti-mating liver function and antioxidant/oxidative stress biomarkers. Forty rats were divided into group (A) served as control, group (B) treated with 93 mg/kg b.wt. lead nitrate, group (C) and group (D) treated as group B in addition to 400 mg/kg b.wt. of turmeric aqueous and ethanolic extracts, respec-tively. Group B showed a significant increase in the activities of alanine transaminase by 10 folds, aspartate transaminase by 9 folds, alkaline phosphatase by 3 folds and the level of malondialdehyde by 10 folds, while showed a significant decrease in albumin by 60%, total protein by 54.5%, and superoxide dismutase by 80.5%, catalase by 75% and glutathione by 71.6% in comparison with control group. On the","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47968268","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}
Pub Date : 2021-12-30DOI: 10.21608/ajs.2021.94272.1414
I. Adss, R. Tabikha
: Aphids are considered as most economically importance and worldwide insect pests. Successful pest management systems are based on accurate and rapid pests' species identification. Traditional morphological identification of closed aphid species may be considered as inaccurate taxonomic process. For overcoming disadvantages of traditional morphological identification, molecular techniques, related to DNA markers and based on polymerase chain reaction (PCR), were approached by using nine ISSRs primers to identify and diagnose fifteen common aphid species that disperse in Egyptian agro-ecosystem. The examined ISSRs primers could successfully discriminate the tested aphid species that reflected 61.39% polymorphism among them. Moreover, four banding patterns were considered as unique bands which could characterize three aphid species ( Aphis gossypii , Aphis nerii and Myzus persicae ). Highest genetic homology (84.9%) was observed between species Rhopalosipum padi and Schizaphis graminum . In additions, each of A. gossypii and Aphis citricola were also genetically homologous species. In contrast, species Aphis craccivora and M. persicae were analogous genetically with low similarity percentile (59.8%).
{"title":"Identification and Reconsidering Phylogeny of Some Aphid Species, (Hemiptera: Aphididae), Based on Molecular DNA Markers Using ISSRs-PCR Technique","authors":"I. Adss, R. Tabikha","doi":"10.21608/ajs.2021.94272.1414","DOIUrl":"https://doi.org/10.21608/ajs.2021.94272.1414","url":null,"abstract":": Aphids are considered as most economically importance and worldwide insect pests. Successful pest management systems are based on accurate and rapid pests' species identification. Traditional morphological identification of closed aphid species may be considered as inaccurate taxonomic process. For overcoming disadvantages of traditional morphological identification, molecular techniques, related to DNA markers and based on polymerase chain reaction (PCR), were approached by using nine ISSRs primers to identify and diagnose fifteen common aphid species that disperse in Egyptian agro-ecosystem. The examined ISSRs primers could successfully discriminate the tested aphid species that reflected 61.39% polymorphism among them. Moreover, four banding patterns were considered as unique bands which could characterize three aphid species ( Aphis gossypii , Aphis nerii and Myzus persicae ). Highest genetic homology (84.9%) was observed between species Rhopalosipum padi and Schizaphis graminum . In additions, each of A. gossypii and Aphis citricola were also genetically homologous species. In contrast, species Aphis craccivora and M. persicae were analogous genetically with low similarity percentile (59.8%).","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46576180","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}
Pub Date : 2021-12-30DOI: 10.21608/ajs.2021.92037.1409
aya kobash, fathi abdel-hadi, ashrf anwer, M. Moustafaa
: This study was conducted to reduce the volume of solid wastes by using unmarketable potato tubers for producing biodegradable plastic films to be substitute oil based plastics “OBP” which is often not biodegradable. Starch based plastic films “SBP” were produced with different concentrations of glycerol (5, 10,15, 20,25, 30, 99.5%v/v) as a plasticizer. The physical properties of SBP including thickness, density, water absorption, biodegradability, were studied, as well as mechanical properties including tensile strength, modulus of elasticity, elongation % and the required energy for firm were also investigated compared with OBP samples. The results showed that the maximum value of extracted starch was 13.5% obtained by blending potato tubers. SBP films with elevated glycerol concentration increased the sample thickness but decreased its density. Glycerol 20% gave the best flexi-ble compact structure SBP films. Average thickness and density SBP film (20% glycerol) were 0.25 mm and 80.11 Kg/m 3 respectively. Meanwhile, the
{"title":"Producing of biodegradable plastic films from un-marketable potato tubers","authors":"aya kobash, fathi abdel-hadi, ashrf anwer, M. Moustafaa","doi":"10.21608/ajs.2021.92037.1409","DOIUrl":"https://doi.org/10.21608/ajs.2021.92037.1409","url":null,"abstract":": This study was conducted to reduce the volume of solid wastes by using unmarketable potato tubers for producing biodegradable plastic films to be substitute oil based plastics “OBP” which is often not biodegradable. Starch based plastic films “SBP” were produced with different concentrations of glycerol (5, 10,15, 20,25, 30, 99.5%v/v) as a plasticizer. The physical properties of SBP including thickness, density, water absorption, biodegradability, were studied, as well as mechanical properties including tensile strength, modulus of elasticity, elongation % and the required energy for firm were also investigated compared with OBP samples. The results showed that the maximum value of extracted starch was 13.5% obtained by blending potato tubers. SBP films with elevated glycerol concentration increased the sample thickness but decreased its density. Glycerol 20% gave the best flexi-ble compact structure SBP films. Average thickness and density SBP film (20% glycerol) were 0.25 mm and 80.11 Kg/m 3 respectively. Meanwhile, the","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48599755","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.75553.1376
K. Mahmoud, S. Fahim
Fruit peels annually accumulate in huge amounts; fruit wastes are rich in lignocellulosic component which can be recovered into mono simple carbohydrates able to utilize for bioethanol production. The enzymatic hydrolysis of lignocelluloses is known to be a key to the second-generation biofuel, the challenge is the still expensive enzymes involved in the saccharification process, loss of the most hemicellulose pentose sugars which were non-fermentable as base, beside the presence of hampers lignin thus require to resolve its problem. As part of study, followed the cost-effective means for bioethanol producing from four fruit peels (Banana, Orange, Mango and Watermelon), yielding of enzymes from co-fungal cultivation carried by Aspergillus niger and Phanerochaete chrysosporium, followed by co-fermentation of the saccharified sugars using yeast belong to Saccharomyces cerevisiae and Kluyveromyces marxianus which contributed for bioethanol production in 8 L lab-scale reactor. The fermented sugars recovering was reached to 27.77 g.l-1 from banana peels which were found to be good exploited as potential raw source, co-fungal enzymatic hydrolysis followed by yeast co-fermentation led to substantial yield by 10.74 g.l-1, the adding of calcium oxide increased the purity which leads finally to 97.5 wt % of pure bioethanol. Thrust towards fossil fuels replacement with renewable clean fuels such as bioethanol by using fruit peels residuals which are considered renewable energy source may also help in CO2 mitigation.
{"title":"Impact Of Microbial Synergism On Second Generation Production Of Bioethanol From Fruit Peels Wastes","authors":"K. Mahmoud, S. Fahim","doi":"10.21608/ajs.2021.75553.1376","DOIUrl":"https://doi.org/10.21608/ajs.2021.75553.1376","url":null,"abstract":"Fruit peels annually accumulate in huge amounts; fruit wastes are rich in lignocellulosic component which can be recovered into mono simple carbohydrates able to utilize for bioethanol production. The enzymatic hydrolysis of lignocelluloses is known to be a key to the second-generation biofuel, the challenge is the still expensive enzymes involved in the saccharification process, loss of the most hemicellulose pentose sugars which were non-fermentable as base, beside the presence of hampers lignin thus require to resolve its problem. As part of study, followed the cost-effective means for bioethanol producing from four fruit peels (Banana, Orange, Mango and Watermelon), yielding of enzymes from co-fungal cultivation carried by Aspergillus niger and Phanerochaete chrysosporium, followed by co-fermentation of the saccharified sugars using yeast belong to Saccharomyces cerevisiae and Kluyveromyces marxianus which contributed for bioethanol production in 8 L lab-scale reactor. The fermented sugars recovering was reached to 27.77 g.l-1 from banana peels which were found to be good exploited as potential raw source, co-fungal enzymatic hydrolysis followed by yeast co-fermentation led to substantial yield by 10.74 g.l-1, the adding of calcium oxide increased the purity which leads finally to 97.5 wt % of pure bioethanol. Thrust towards fossil fuels replacement with renewable clean fuels such as bioethanol by using fruit peels residuals which are considered renewable energy source may also help in CO2 mitigation.","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49512747","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.68600.1352
rana gamaleldin, M. A. Rashed, Mahmoud Magdy
Fish play an essential role in food security and are regarded as one of Egypt's primary food resources and, therefore, significantly im-pact the national economy. The three main sources of fish production in Egypt: marine (Red and Mediterranean seas), lakes and the River Nile, due to the elevated incidence of species substitution at the global level, precise identification of seafood species on the markets considered a solution for food safety control institutions and human consumer protec-tion. Mislabeling occurs when one species is substituted for another. Different species of red sea marine fish were collected from the Egyptian market. According to the Arabic name in the fish market, Samples searched for English and Latin family names in (www.fishdata-base.org). Commercial samples were successfully extracted and confirmed with 1.5% agarose gel electrophoresis. The result showed that the mtDNA gene cytochrome c oxidase subunit I (COI) amplification was successful for all samples with high concentration, it was purified and sequenced for both directions and blasted using the NCBI database. Resulting in the identification of three commercially essential and expensive fish samples, Baghbaghan (parrotfish), Hamour (Greasy Grouper) and kahaya (Spiny squirrelfish). One of them correctly identified according to the market name, while the other two are recorded mistakenly under another name.
{"title":"DNA Barcoding of Commercial Three High Value Red Sea Fishes from the Egyptian Market","authors":"rana gamaleldin, M. A. Rashed, Mahmoud Magdy","doi":"10.21608/ajs.2021.68600.1352","DOIUrl":"https://doi.org/10.21608/ajs.2021.68600.1352","url":null,"abstract":"Fish play an essential role in food security and are regarded as one of Egypt's primary food resources and, therefore, significantly im-pact the national economy. The three main sources of fish production in Egypt: marine (Red and Mediterranean seas), lakes and the River Nile, due to the elevated incidence of species substitution at the global level, precise identification of seafood species on the markets considered a solution for food safety control institutions and human consumer protec-tion. Mislabeling occurs when one species is substituted for another. Different species of red sea marine fish were collected from the Egyptian market. According to the Arabic name in the fish market, Samples searched for English and Latin family names in (www.fishdata-base.org). Commercial samples were successfully extracted and confirmed with 1.5% agarose gel electrophoresis. The result showed that the mtDNA gene cytochrome c oxidase subunit I (COI) amplification was successful for all samples with high concentration, it was purified and sequenced for both directions and blasted using the NCBI database. Resulting in the identification of three commercially essential and expensive fish samples, Baghbaghan (parrotfish), Hamour (Greasy Grouper) and kahaya (Spiny squirrelfish). One of them correctly identified according to the market name, while the other two are recorded mistakenly under another name.","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44843961","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.74341.1371
Sawsan M. Abdelmegeed
Mulberry silkworm, Bombyx mori L. is infected with many diseases. In this work, two fungi species, Aspergillus fumigatus and Aspergillus flavus , were isolated from the infected B. mori larvae during rearing process. The morphological symptoms were the same for both fungi and appeared from newly hatched larvae until moth formation. In larvae, black spots of both fungi species appeared eve-rywhere on the body, then these spots extended and eventually larvae died, and fragments of the fungus came out from the spots. The only one difference between the two fungi, is that symptoms of A. fumigatus appeared four days earlier than those of A. flavus . Newly hatched larvae were sprayed with spore suspension (1x10 6 conidia spores/ml) of A. fumigates and A. flavus separately. One and 12 hrs. after inoculation, larvae were sprayed with different concentrations of fungicide (Actamyl), salicylic acid, and henna and propolis powders, in isolation. After words, mortality and survival percentages were calculated and compared to those that occurred in untreated check (larvae were inoculated with A. fumigatus and A. flavus separately without any control treatment). The lowest mortality and highest survival per-centage were occurred in larvae treated with salicylic acid at 10% after 12 hrs. from inoculation with A. fumigatus . On the other hand, the lowest mortality and highest survival percentages occurred in larvae treated with the fungicide Actamyl at 6% and henna at 15% after 12 hrs. from inoculation with A. flavus.
{"title":"Effect of Fungicide, Salicylic Acid, Henna Powder and Propolis on Silkworm Larvae Infected with Aspergillus sp.","authors":"Sawsan M. Abdelmegeed","doi":"10.21608/ajs.2021.74341.1371","DOIUrl":"https://doi.org/10.21608/ajs.2021.74341.1371","url":null,"abstract":"Mulberry silkworm, Bombyx mori L. is infected with many diseases. In this work, two fungi species, Aspergillus fumigatus and Aspergillus flavus , were isolated from the infected B. mori larvae during rearing process. The morphological symptoms were the same for both fungi and appeared from newly hatched larvae until moth formation. In larvae, black spots of both fungi species appeared eve-rywhere on the body, then these spots extended and eventually larvae died, and fragments of the fungus came out from the spots. The only one difference between the two fungi, is that symptoms of A. fumigatus appeared four days earlier than those of A. flavus . Newly hatched larvae were sprayed with spore suspension (1x10 6 conidia spores/ml) of A. fumigates and A. flavus separately. One and 12 hrs. after inoculation, larvae were sprayed with different concentrations of fungicide (Actamyl), salicylic acid, and henna and propolis powders, in isolation. After words, mortality and survival percentages were calculated and compared to those that occurred in untreated check (larvae were inoculated with A. fumigatus and A. flavus separately without any control treatment). The lowest mortality and highest survival per-centage were occurred in larvae treated with salicylic acid at 10% after 12 hrs. from inoculation with A. fumigatus . On the other hand, the lowest mortality and highest survival percentages occurred in larvae treated with the fungicide Actamyl at 6% and henna at 15% after 12 hrs. from inoculation with A. flavus.","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45974669","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.71422.1358
S. El-Deeb
The presented study aimed to evaluate the different control methods of the rusty flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae). The experiments were conducted to evaluate the efficiency of a chemical pesticide (Mala-thion), biopesticide (Tracer 24% SC), plant oil (Lemongrass oil), plant extraction (Ac-etone extracts from Rosemary), powder (Diatomaceous earth) and modified Atmosphere (argon gas). Mortality percentage increased with increase of exposure times at all tested concentrations. The toxicity effect of different treatments against adults of T. castaneum at the LC 50 after 7 days post-treatment at 30±1°C could be arranged in descending order as follows: Malathion, Tracer 24% and lemongrass oil, while, acetone extracts from Rosemary and diatomaceous earth (DE) were the least effective. The LT 50 values against the adult stage of T. castaneum were 19.99, 2.33 and 4.86 hr. for Argon 100, 80 and 60%, respectively. In order to avoid the disadvantages of using chemical insecticides such as malathion, it is recommended to use other more safe control methods for the environment as Tracer 24%
{"title":"Evaluation of different control methods on the rust flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)","authors":"S. El-Deeb","doi":"10.21608/ajs.2021.71422.1358","DOIUrl":"https://doi.org/10.21608/ajs.2021.71422.1358","url":null,"abstract":"The presented study aimed to evaluate the different control methods of the rusty flour beetle Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae). The experiments were conducted to evaluate the efficiency of a chemical pesticide (Mala-thion), biopesticide (Tracer 24% SC), plant oil (Lemongrass oil), plant extraction (Ac-etone extracts from Rosemary), powder (Diatomaceous earth) and modified Atmosphere (argon gas). Mortality percentage increased with increase of exposure times at all tested concentrations. The toxicity effect of different treatments against adults of T. castaneum at the LC 50 after 7 days post-treatment at 30±1°C could be arranged in descending order as follows: Malathion, Tracer 24% and lemongrass oil, while, acetone extracts from Rosemary and diatomaceous earth (DE) were the least effective. The LT 50 values against the adult stage of T. castaneum were 19.99, 2.33 and 4.86 hr. for Argon 100, 80 and 60%, respectively. In order to avoid the disadvantages of using chemical insecticides such as malathion, it is recommended to use other more safe control methods for the environment as Tracer 24%","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47917996","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.77066.1382
Marwa Abdel-Hady, M. El-Shemy, S. Mahdy, E. Rizk
This study was to evaluate the activity of peroxidase, polyphenoloxidase, pectin methyl esterase and protease as well as the proximate chemical composition and quality parameters of cactus pear and papaya which were dried by different methods and stored for 6 months. Our findings revealed that the highest moisture content was recorded in osmo – freeze drying of papaya and cactus pear. On the other hand, the browning index of oven dried papaya and cactus pear was higher than those dried with osmotic dehydration and osmo – freeze drying. The less activity of peroxidase was recorded in osmo – freeze drying of papaya and cactus pear. Also, the highest reduction of polyphenoloxidase activity was noticed in osmo–freeze drying methods. While oven dried papaya recorded the highest activity of pectin methyl esterase pectin (0.34 %), complete inactivation was shown in other dried methods after 6 months of storage at 4 ±1℃. Different dried methods of papaya caused to reduce the activity of protease; moreover, complete inactivation was observed after 3 months from storage. The quality parameters for sensory evaluation of dried cactus pear and papaya demonstrated that osmo–freeze drying was more favorable to preserve samples followed by osmotic dehydration and oven drying
{"title":"Effect of Different Dried Methods and Storage on Some Enzymes Activity and Quality of Cactus pear and Papaya","authors":"Marwa Abdel-Hady, M. El-Shemy, S. Mahdy, E. Rizk","doi":"10.21608/ajs.2021.77066.1382","DOIUrl":"https://doi.org/10.21608/ajs.2021.77066.1382","url":null,"abstract":"This study was to evaluate the activity of peroxidase, polyphenoloxidase, pectin methyl esterase and protease as well as the proximate chemical composition and quality parameters of cactus pear and papaya which were dried by different methods and stored for 6 months. Our findings revealed that the highest moisture content was recorded in osmo – freeze drying of papaya and cactus pear. On the other hand, the browning index of oven dried papaya and cactus pear was higher than those dried with osmotic dehydration and osmo – freeze drying. The less activity of peroxidase was recorded in osmo – freeze drying of papaya and cactus pear. Also, the highest reduction of polyphenoloxidase activity was noticed in osmo–freeze drying methods. While oven dried papaya recorded the highest activity of pectin methyl esterase pectin (0.34 %), complete inactivation was shown in other dried methods after 6 months of storage at 4 ±1℃. Different dried methods of papaya caused to reduce the activity of protease; moreover, complete inactivation was observed after 3 months from storage. The quality parameters for sensory evaluation of dried cactus pear and papaya demonstrated that osmo–freeze drying was more favorable to preserve samples followed by osmotic dehydration and oven drying","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49507559","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.68479.1351
Salwa Pasha
{"title":"Assessment of some essential oils and their mixtures as materail repellents against the confused flour beetle, adult Tribolium confusum (du val) (Coleoptera: Tenebrionidae).","authors":"Salwa Pasha","doi":"10.21608/ajs.2021.68479.1351","DOIUrl":"https://doi.org/10.21608/ajs.2021.68479.1351","url":null,"abstract":"","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48084048","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}
Pub Date : 2021-09-07DOI: 10.21608/ajs.2021.78941.1386
ايمني فريد ابو حديد, نظمي عبد الحميد عبد الغني, Samah Nasr, Abdelaty Aboelezz
{"title":"Effect of some growth regulators and systemic copper complexes on reducing floral malformation, yield and quality of \"Alphonse\" mango (Mangifera indica L. )","authors":"ايمني فريد ابو حديد, نظمي عبد الحميد عبد الغني, Samah Nasr, Abdelaty Aboelezz","doi":"10.21608/ajs.2021.78941.1386","DOIUrl":"https://doi.org/10.21608/ajs.2021.78941.1386","url":null,"abstract":"","PeriodicalId":8366,"journal":{"name":"Arab Universities Journal of Agricultural Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44648575","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：