Pub Date : 2021-08-05DOI: 10.9734/bpi/cacs/v3/3235f
B. Dabolé, R. Zeukang, A. T. Atchadé, T. Tabopda, B. Koubala, J. Mbafor
The aim of this study was to investigate the roots and the stem barks of Cordia platythyrsa with the view to improve the chemiotaxonomy value in the Cordia genus. Phytochemical investigation of the roots and stem barks of Cordia platythyrsa (Boraginaceae) had led to the isolation of two new cinnamates, the cordicinnamate A compound 1 and the cordicinnamate B compound 2 along with four known compounds. Their structures were established by spectroscopic analysis mainly FAB and TOF –MS, 1H NMR and 13C NMR, COSY, HMBC, HSQC and by comparison with literature data. The cinnamoyl derivatives were reported for the first time in the Cordia genus. The isolation and identification of cinnamoyl derivatives in cordia genus improve the chemiotaxonomy value in this genus.
{"title":"Estimation of Cinnamoyl Derivatives from Cordia Platythyrsa and Chemiotaxonomical Value of the Cordia Genus","authors":"B. Dabolé, R. Zeukang, A. T. Atchadé, T. Tabopda, B. Koubala, J. Mbafor","doi":"10.9734/bpi/cacs/v3/3235f","DOIUrl":"https://doi.org/10.9734/bpi/cacs/v3/3235f","url":null,"abstract":"The aim of this study was to investigate the roots and the stem barks of Cordia platythyrsa with the view to improve the chemiotaxonomy value in the Cordia genus. Phytochemical investigation of the roots and stem barks of Cordia platythyrsa (Boraginaceae) had led to the isolation of two new cinnamates, the cordicinnamate A compound 1 and the cordicinnamate B compound 2 along with four known compounds. Their structures were established by spectroscopic analysis mainly FAB and TOF –MS, 1H NMR and 13C NMR, COSY, HMBC, HSQC and by comparison with literature data. The cinnamoyl derivatives were reported for the first time in the Cordia genus. The isolation and identification of cinnamoyl derivatives in cordia genus improve the chemiotaxonomy value in this genus.","PeriodicalId":9714,"journal":{"name":"Challenges and Advances in Chemical Science Vol. 3","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85525282","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 : 2021-08-05DOI: 10.9734/bpi/cacs/v3/2819f
Leila Hojatkashani̇
Solar energy and its conversion to electricity is an important research in the last decade. Solar cells are consist of a p-type semiconductor as donor and an n-type semiconductor as acceptor. Organic polymers as organic semiconductors are used in an organic solar cell. This research is a theoretical investigation of Fullerene C60 as donor and C60 doped derivatives with Silicon and Germanium atoms as acceptors for basic structure of a solar cell. This research is done not only with using related equations but also with investigating theoretical UV-VIS spectrum of the chosen donors-acceptors and their absorption wavelengths, oscillator strength and maximum coefficient absorptions of these solar cells.
{"title":"A DFT Study on Theoretical Investigation of Application of Combining Pristine C60 and doped C60 with Silicon and Germanium Atoms for Solar cells","authors":"Leila Hojatkashani̇","doi":"10.9734/bpi/cacs/v3/2819f","DOIUrl":"https://doi.org/10.9734/bpi/cacs/v3/2819f","url":null,"abstract":"Solar energy and its conversion to electricity is an important research in the last decade. Solar cells are consist of a p-type semiconductor as donor and an n-type semiconductor as acceptor. Organic polymers as organic semiconductors are used in an organic solar cell. This research is a theoretical investigation of Fullerene C60 as donor and C60 doped derivatives with Silicon and Germanium atoms as acceptors for basic structure of a solar cell. This research is done not only with using related equations but also with investigating theoretical UV-VIS spectrum of the chosen donors-acceptors and their absorption wavelengths, oscillator strength and maximum coefficient absorptions of these solar cells.","PeriodicalId":9714,"journal":{"name":"Challenges and Advances in Chemical Science Vol. 3","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83878838","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}
{"title":"A Detailed Analysis of Nitrates and Nitrites in Groundwater of Ilorin Environs","authors":"Oluwadurotimi, Akiwumi, Omodélé, Eletta, Oluyemi, Odebunmi","doi":"10.9734/bpi/cacs/v3/2438f","DOIUrl":"https://doi.org/10.9734/bpi/cacs/v3/2438f","url":null,"abstract":"","PeriodicalId":9714,"journal":{"name":"Challenges and Advances in Chemical Science Vol. 3","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79491406","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 : 2021-01-01DOI: 10.9734/bpi/cacs/v3/11532d
J. Kuberan, N. Alagumurthi
During recent years the increasing consumption of fossil fuel has led to the search for alternative energy. Microalgae emerged as one of the potential sources of Bio-fuels from algae, and it is mostly preferred because it is sustainable and environment-friendly. The oil extracted from spirulina and chlorella microalgae through pyrolysis process at a temperature of 350oC, and the bio-oil properties were analysed. When compared to spirulina bio-oil, the viscosity and density of chlorella bio-oil were very close to the conventional diesel fuel. The Experiment was conducted in a single cylinder four stroke diesel engine for various loading conditions and was carried out for B10 blend for spirulina and chlorella algae bio-fuel, CL10D90 showed maximum output power at 100% load condition has been nearly same for diesel fuel than SP10D90, and the Specific fuel consumption is nearly same when compared with diesel. The Brake thermal efficiency of CL10D90 increases by 4% than SP10 D90 and 2% than diesel, and the combustion characteristic of peak heat release rate is higher and also there is a reduction in HC, CO emission at full load, with slight increase in NOX emission. The experimental result shows that the use of CL10D90 bio-oil in diesel engine is a suitable alternative to diesel.
{"title":"Experimental Investigation Highlighting Performance and Emission Characteristics of Algae Bio-Fuelled Diesel Engine","authors":"J. Kuberan, N. Alagumurthi","doi":"10.9734/bpi/cacs/v3/11532d","DOIUrl":"https://doi.org/10.9734/bpi/cacs/v3/11532d","url":null,"abstract":"During recent years the increasing consumption of fossil fuel has led to the search for alternative energy. Microalgae emerged as one of the potential sources of Bio-fuels from algae, and it is mostly preferred because it is sustainable and environment-friendly. The oil extracted from spirulina and chlorella microalgae through pyrolysis process at a temperature of 350oC, and the bio-oil properties were analysed. When compared to spirulina bio-oil, the viscosity and density of chlorella bio-oil were very close to the conventional diesel fuel. The Experiment was conducted in a single cylinder four stroke diesel engine for various loading conditions and was carried out for B10 blend for spirulina and chlorella algae bio-fuel, CL10D90 showed maximum output power at 100% load condition has been nearly same for diesel fuel than SP10D90, and the Specific fuel consumption is nearly same when compared with diesel. The Brake thermal efficiency of CL10D90 increases by 4% than SP10 D90 and 2% than diesel, and the combustion characteristic of peak heat release rate is higher and also there is a reduction in HC, CO emission at full load, with slight increase in NOX emission. The experimental result shows that the use of CL10D90 bio-oil in diesel engine is a suitable alternative to diesel.","PeriodicalId":9714,"journal":{"name":"Challenges and Advances in Chemical Science Vol. 3","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81450184","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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