Pub Date : 2021-06-30DOI: 10.47363/jmsmr/2021(2)114
Osarumwense Peter Osarodion, Omotade Treasure Ejodamen
Looking at the previous studies on quinazolinones derivatives, only limited information’s are available on their mass spectral along with the preparation of novel quinazolin-4-(3H)-one derivatives The condensation of Methyl-2-amino-4-Chlorobenzoate with acetic anhydride yielded the cyclic compound 2-methyl 7-Chloro-1, 3-benzo-oxazine-4-one (1) which further produce 3-Amino-2-Methyl 7-Chloro quinazolin-4(3H)-ones (2) via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Infrared, Nuclear Magnetic Resonance (1H and 13C), Gas Chromatography-Mass spectrophotometry and Elemental analysis. Discussion: The molecular ion of m/z 235 fragments to give m/z 220 by loss of –NH group. The ion of m/z 220 was broken to give m/z 206 by losing CH2 group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH3 group and then m/z 136 by loss of CN group. The loss of O gave m/z 120 which fragment to give m/z 93 by loss of –HCN and finally gave m/z 65 by loss of CO group. Conclusion: The electron impact ionization mass spectra of compound 2show a weak molecular ion peak and a base peak of m/z 235resulting from a cleavage fragmentation. Compound 2 give a characteristic fragmentation pattern. From the study of the mass spectra of compound 2, it was found that the molecular ion had fragmented to the m/z 220. The final fragmentation led to ion of m/z 93 and ion of mass m/z 65, respectively
{"title":"Electron Impact Ionization Mass Spectra of 3-Amino 6-Chloro2-methyl Quinazolin-4-(3H)-one Derivative","authors":"Osarumwense Peter Osarodion, Omotade Treasure Ejodamen","doi":"10.47363/jmsmr/2021(2)114","DOIUrl":"https://doi.org/10.47363/jmsmr/2021(2)114","url":null,"abstract":"Looking at the previous studies on quinazolinones derivatives, only limited information’s are available on their mass spectral along with the preparation of novel quinazolin-4-(3H)-one derivatives The condensation of Methyl-2-amino-4-Chlorobenzoate with acetic anhydride yielded the cyclic compound 2-methyl 7-Chloro-1, 3-benzo-oxazine-4-one (1) which further produce 3-Amino-2-Methyl 7-Chloro quinazolin-4(3H)-ones (2) via the reaction with hydrazine hydrate. The compounds synthesized were unequivocally confirmed by means of Infrared, Nuclear Magnetic Resonance (1H and 13C), Gas Chromatography-Mass spectrophotometry and Elemental analysis. Discussion: The molecular ion of m/z 235 fragments to give m/z 220 by loss of –NH group. The ion of m/z 220 was broken to give m/z 206 by losing CH2 group and fragment to m/z 177 by loss of HCO. This fragmented to m/z 162 by loss of –CH3 group and then m/z 136 by loss of CN group. The loss of O gave m/z 120 which fragment to give m/z 93 by loss of –HCN and finally gave m/z 65 by loss of CO group. Conclusion: The electron impact ionization mass spectra of compound 2show a weak molecular ion peak and a base peak of m/z 235resulting from a cleavage fragmentation. Compound 2 give a characteristic fragmentation pattern. From the study of the mass spectra of compound 2, it was found that the molecular ion had fragmented to the m/z 220. The final fragmentation led to ion of m/z 93 and ion of mass m/z 65, respectively","PeriodicalId":16328,"journal":{"name":"Journal of Material Sciences & Manufacturing Research","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75037482","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 : 2021-06-30DOI: 10.47363/jmsmr/2021(2)113
Elsayed Ahmed Elnashar
Self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel is receiving an increasing amount of interest worldwide as a method to address Antimicrobial in materials. In particular, for advanced high-performance fiber-reinforced polymer of self-reboot-mobility (SRM) with composite materials, Self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel offers an alternative to employing conservative damagetolerant designs and a mechanism for ameliorating inaccessible and invidious internal Antimicrobial within a structure. This article considers in some detail the various self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel technologies currently being developed for SRM with composite materials. Key constraints for incorporating such a function in SRMs are that it not be detrimental to inherent mechanical properties and that it not impose a severe weight penalty
{"title":"Self-Reboot-Mobility of Self-Cleaning Antimicrobial Industry on Textiles and Apparel for Impact of COVID-19","authors":"Elsayed Ahmed Elnashar","doi":"10.47363/jmsmr/2021(2)113","DOIUrl":"https://doi.org/10.47363/jmsmr/2021(2)113","url":null,"abstract":"Self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel is receiving an increasing amount of interest worldwide as a method to address Antimicrobial in materials. In particular, for advanced high-performance fiber-reinforced polymer of self-reboot-mobility (SRM) with composite materials, Self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel offers an alternative to employing conservative damagetolerant designs and a mechanism for ameliorating inaccessible and invidious internal Antimicrobial within a structure. This article considers in some detail the various self-reboot-mobility of self-cleaning antimicrobial industry on textiles and apparel technologies currently being developed for SRM with composite materials. Key constraints for incorporating such a function in SRMs are that it not be detrimental to inherent mechanical properties and that it not impose a severe weight penalty","PeriodicalId":16328,"journal":{"name":"Journal of Material Sciences & Manufacturing Research","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81816854","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 : 2020-12-31DOI: 10.47363/jmsmr/2020(1)111
A. O H, Ojo S A, Uzuh F U, Abere D V, Ayeni Ts, Adamu U W, Abubakar U B S, Yahaya I O
Reinforcement steel bars are often exposed to the atmosphere before use in concrete structures. This exposure results in corrosion of these reinforcement bars. Corrosion of reinforcement bars is a common form of degradation of reinforced concrete structures. The electrochemical attack affects the mechanical properties of steel rebars. This study analysed the effect of exposing reinforcing steel bars to the atmosphere. The bars were divided into two; one part was exposed to the atmosphere for a period of four months during the rainy season while the other was unexposed. Afterwards; some mechanical, corrosion and metallographic tests were carried out on the steel samples. The results obtained showed that the hardness, impact strength and ductility increased with exposure while the yield and tensile strengths decreased with exposure. The exposed bar had high corrosion rates than the unexposed bar in 1M hydrochloric acid (HCl) while in 1M sodium chloride (NaCl), the corrosion rates for both the exposed and unexposed bars did not follow a particular trend
{"title":"Examination of Reinforcement Steel Bars Exposed to the Atmosphere","authors":"A. O H, Ojo S A, Uzuh F U, Abere D V, Ayeni Ts, Adamu U W, Abubakar U B S, Yahaya I O","doi":"10.47363/jmsmr/2020(1)111","DOIUrl":"https://doi.org/10.47363/jmsmr/2020(1)111","url":null,"abstract":"Reinforcement steel bars are often exposed to the atmosphere before use in concrete structures. This exposure results in corrosion of these reinforcement bars. Corrosion of reinforcement bars is a common form of degradation of reinforced concrete structures. The electrochemical attack affects the mechanical properties of steel rebars. This study analysed the effect of exposing reinforcing steel bars to the atmosphere. The bars were divided into two; one part was exposed to the atmosphere for a period of four months during the rainy season while the other was unexposed. Afterwards; some mechanical, corrosion and metallographic tests were carried out on the steel samples. The results obtained showed that the hardness, impact strength and ductility increased with exposure while the yield and tensile strengths decreased with exposure. The exposed bar had high corrosion rates than the unexposed bar in 1M hydrochloric acid (HCl) while in 1M sodium chloride (NaCl), the corrosion rates for both the exposed and unexposed bars did not follow a particular trend","PeriodicalId":16328,"journal":{"name":"Journal of Material Sciences & Manufacturing Research","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86018169","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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