{"title":"Analysis of kuali and associated blood-lead changes in users","authors":"N. Jalil, Ey Adesodun, Ju Farshori","doi":"10.4314/NJCR.V1I1.35616","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35616","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129006963","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":"Preliminary investigation of dye-ion-surfactant systems for the spectrophotometric determination of trace metals","authors":"T. Abii, J. Olayemi","doi":"10.4314/NJCR.V1I1.35620","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35620","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114765480","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":"Molecular conformations of some ten-membered ring sesquiterpenes","authors":"V. Ajibola, Satish Thomas","doi":"10.4314/NJCR.V1I1.35614","DOIUrl":"https://doi.org/10.4314/NJCR.V1I1.35614","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129486040","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":"Complexes of oxovanadium (IV) sulphate with some cyclocarboxylic acid hydrazides","authors":"J. Nwabueze, Ot Ogunmoroti","doi":"10.4314/NJCR.V5I1.35599","DOIUrl":"https://doi.org/10.4314/NJCR.V5I1.35599","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122541564","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}
J. J. Bonire, P. F. Olurinola, J. Ehinmidu, As Shettima, Sg Yiase
{"title":"Synthesis and some spectral properties of diphenylsilicon salicylate and a comparision of the antifungal efficacy of diphenylsilicon chloride, acetate and salicylate and diphenyltin chloride, acetate and salicylate on Candida albicans","authors":"J. J. Bonire, P. F. Olurinola, J. Ehinmidu, As Shettima, Sg Yiase","doi":"10.4314/NJCR.V5I1.35600","DOIUrl":"https://doi.org/10.4314/NJCR.V5I1.35600","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129734953","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":"Evaluation of maize cob peat for decoloration of dye waters","authors":"Ba Bakalyil, M. Ibrahim, E. Ekanem","doi":"10.4314/NJCR.V4I1.35595","DOIUrl":"https://doi.org/10.4314/NJCR.V4I1.35595","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132161024","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}
Jatropha seed meal was extracted with n-hexane and the oil obtained was found to have iodine val ue 157.37, acid value 5,61 and free fatty acid 2.70. The fatty acid profile of the oil showed that oleic acid (3 1.35 %), palmitic acid (20.9 %) stearic acid (15.68 %) and caprylic acid (10.45 %) were the major fatty acid components. The seed oil was epoxidised at 29°C using peracetic acid produced in situ by reacting hydrogen peroxide (30 % vlv ) wi th various amounts of glacial acetic acid. Barium, cadmium, lead and zinc soaps of the oils were prepared by metathesis in alcohol solution. Thermal degradation studies on poly (vinyl chloride) in the presence of Jati'Opha seed oil, the epoxidised oil and the metal soaps of the oil s were carried out at various temperatures (170, 180 and 190°C) under ox idati ve and non-oxidative conditions. Changes in intrinsic viscosity and levels of unsaturation in the degraded polymer samples together with kinetic data (rate measurements at 1% conversion) were used to evaluate the relative stabili sing effect of the additives on the thermal degradation of poly (vinyl chloride). It was found that although the values of the rate of dehydrochlorination were of about the same order of magnitude (10- 2 % min· the rates were relatively lower, and the time at which degradation reached 1 % conversion considerably higher than the corresponding values obtained in the ·absence of the additives. The data from solution viscosity measurements and from estimates of the level of unsaturation in the degraded polymer samples indicate that metal soaps of the oil exert stabilising effect on the oxidative and monoxidative thermal degradation of poly (v inyl chloride). Th e low th ermal stabil it y of poly (v in yl chl oride), PVC is one of th e inherent problems associated with the manufacture and use of th e polymer. At elevated temperat ures , well below its decomposition temperature, PVC loses HCI , and becomes colourl ess , lea din g to changes 111 chemical and physical properties of th e polymer. Thermal degradation of PVC is genera ll y considered to be initiated at un stab le st ructural irregular sites (particu larly tertiary and allylic ch lori des) within PVC; and so me auth ors 1 5
{"title":"Utilisation of rubber seed oil in the stabilisation of polyvinyl chloride against thermal degradation","authors":"F. Okieimen","doi":"10.4314/NJCR.V4I1.35590","DOIUrl":"https://doi.org/10.4314/NJCR.V4I1.35590","url":null,"abstract":"Jatropha seed meal was extracted with n-hexane and the oil obtained was found to have iodine val ue 157.37, acid value 5,61 and free fatty acid 2.70. The fatty acid profile of the oil showed that oleic acid (3 1.35 %), palmitic acid (20.9 %) stearic acid (15.68 %) and caprylic acid (10.45 %) were the major fatty acid components. The seed oil was epoxidised at 29°C using peracetic acid produced in situ by reacting hydrogen peroxide (30 % vlv ) wi th various amounts of glacial acetic acid. Barium, cadmium, lead and zinc soaps of the oils were prepared by metathesis in alcohol solution. Thermal degradation studies on poly (vinyl chloride) in the presence of Jati'Opha seed oil, the epoxidised oil and the metal soaps of the oil s were carried out at various temperatures (170, 180 and 190°C) under ox idati ve and non-oxidative conditions. Changes in intrinsic viscosity and levels of unsaturation in the degraded polymer samples together with kinetic data (rate measurements at 1% conversion) were used to evaluate the relative stabili sing effect of the additives on the thermal degradation of poly (vinyl chloride). It was found that although the values of the rate of dehydrochlorination were of about the same order of magnitude (10- 2 % min· the rates were relatively lower, and the time at which degradation reached 1 % conversion considerably higher than the corresponding values obtained in the ·absence of the additives. The data from solution viscosity measurements and from estimates of the level of unsaturation in the degraded polymer samples indicate that metal soaps of the oil exert stabilising effect on the oxidative and monoxidative thermal degradation of poly (v inyl chloride). Th e low th ermal stabil it y of poly (v in yl chl oride), PVC is one of th e inherent problems associated with the manufacture and use of th e polymer. At elevated temperat ures , well below its decomposition temperature, PVC loses HCI , and becomes colourl ess , lea din g to changes 111 chemical and physical properties of th e polymer. Thermal degradation of PVC is genera ll y considered to be initiated at un stab le st ructural irregular sites (particu larly tertiary and allylic ch lori des) within PVC; and so me auth ors 1 5","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133655521","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":"Chemically enhanced recovery of bicarbonate from lake salt","authors":"E. Ekanem, G. Harrison, A. Kyere","doi":"10.4314/NJCR.V4I1.35589","DOIUrl":"https://doi.org/10.4314/NJCR.V4I1.35589","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128026189","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":"Distribution of some heavy metals in water and some fish species in Zobe dam","authors":"S. Batagarawa, Sl Uli","doi":"10.4314/NJCR.V5I1.35601","DOIUrl":"https://doi.org/10.4314/NJCR.V5I1.35601","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127803132","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}
J. J. Bonire, As Shettima, N. Jalil, G. Ayoko, Sg Yiase
{"title":"Synthetic and spectroscopic studies of some organotin pseudohalide 4-picoline complexes","authors":"J. J. Bonire, As Shettima, N. Jalil, G. Ayoko, Sg Yiase","doi":"10.4314/NJCR.V4I1.35594","DOIUrl":"https://doi.org/10.4314/NJCR.V4I1.35594","url":null,"abstract":"","PeriodicalId":102130,"journal":{"name":"Nigerian Journal of Chemical Research","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124392894","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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