Pub Date : 2020-03-23DOI: 10.21608/ejphysics.2020.29413.1042
Sahar E. Abo-Neima, M. El-Metwally
In the past years the extremely low frequency magnetic field (ELF-MF) of the millimeter range has been actively used in biology, medicine, biotechnology, in this study the impact of electromagnetic radiations in growth, carboxymethycellulase activity (CMCase), cell conductivity and RAPD DNA pattern of A. niger were investigated. Experimentally, when the fungus treated with magnetic field at constant intensity 50Hz, 10 mT at different exposure times for five days (2 h/day) the total biomass dry weight inhibited by 72.2% after the first 2 h. ELF-MF showed also inhibition effect of in CMCase activity of A. niger. The enzyme activity was decreased from 30 IU/ml to 22.5 IU/ml after only 2h of exposure and the treated fungus lost about 50% of its CMCase activity after 10 h.The treated fungus showed also decreased in conductivity of fungal cells from 1.78×10 -1 to 0.51×10 -5 Siemens/meter. The study extended to detect the changes in RAPD patterns of A. niger DNA before and after exposure to the 50 Hz frequency. In conclusion, ELF-MF can be used as a safe method in control the activity of higly resistant fungi as A. niger .
{"title":"Effect of extremely low frequency magnetic field in growth, CMCase, electric conductivity and DNA of Aspergillus niger","authors":"Sahar E. Abo-Neima, M. El-Metwally","doi":"10.21608/ejphysics.2020.29413.1042","DOIUrl":"https://doi.org/10.21608/ejphysics.2020.29413.1042","url":null,"abstract":"In the past years the extremely low frequency magnetic field (ELF-MF) of the millimeter range has been actively used in biology, medicine, biotechnology, in this study the impact of electromagnetic radiations in growth, carboxymethycellulase activity (CMCase), cell conductivity and RAPD DNA pattern of A. niger were investigated. Experimentally, when the fungus treated with magnetic field at constant intensity 50Hz, 10 mT at different exposure times for five days (2 h/day) the total biomass dry weight inhibited by 72.2% after the first 2 h. ELF-MF showed also inhibition effect of in CMCase activity of A. niger. The enzyme activity was decreased from 30 IU/ml to 22.5 IU/ml after only 2h of exposure and the treated fungus lost about 50% of its CMCase activity after 10 h.The treated fungus showed also decreased in conductivity of fungal cells from 1.78×10 -1 to 0.51×10 -5 Siemens/meter. The study extended to detect the changes in RAPD patterns of A. niger DNA before and after exposure to the 50 Hz frequency. In conclusion, ELF-MF can be used as a safe method in control the activity of higly resistant fungi as A. niger .","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90718219","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.1.1
{"title":"Assessment of High-Velocity Free Surface Flow Interaction with a Bridge Pier in A Curved Channel","authors":"","doi":"10.22587/jasr.2019.15.1.1","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.1.1","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91472218","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.3.5
{"title":"Phenotypic and Genomic in Organ Matching in Fetal Species","authors":"","doi":"10.22587/jasr.2019.15.3.5","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.3.5","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89421769","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.2.1
{"title":"Effect of Collaboration Through Social Media on Collaborative Overload, Burnout and Employee Engagement","authors":"","doi":"10.22587/jasr.2019.15.2.1","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.2.1","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82072683","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.4.4
{"title":"Molecular Infection in Tumor Growth Through Hypoxic Disorder","authors":"","doi":"10.22587/jasr.2019.15.4.4","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.4.4","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89825366","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.3.2
{"title":"In Vitro Whitening Properties and Antioxidative Potentials of The\u0000Extracts of Three Melastoma Leaves Species (M. malabathricum, M.\u0000hirta and M. decemfidum)","authors":"","doi":"10.22587/jasr.2019.15.3.2","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.3.2","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75583705","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.5.4
{"title":"Rainwater Harvesting In Varied Sizes Of Residential Plots In Dhaka City","authors":"","doi":"10.22587/jasr.2019.15.5.4","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.5.4","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87570125","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 : 2019-01-01DOI: 10.22587/jasr.2019.15.5.5
{"title":"Common Diabetogenic Agents Used in Experimental Animals: A Review","authors":"","doi":"10.22587/jasr.2019.15.5.5","DOIUrl":"https://doi.org/10.22587/jasr.2019.15.5.5","url":null,"abstract":"","PeriodicalId":22622,"journal":{"name":"The Journal of Applied Sciences Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82256248","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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