Academic Journal of Chemistry
Online ISSN: 2519-7045
Print ISSN: 2521-0211
Print ISSN: 2521-0211
Quarterly Published (4 Issues Per Year)
Volume 5 Number 7 September 2020
Synthesis of a Number of Unsymmetrical Bridged Terphthaloyl Acetophenone Oxime Esters
Authors: Ramadan Ali Bawa ; Hana Mansoure Elmajdoub
A number of unsymmetrical bridged terphthaloyl acetophenone oxime esters has been synthesized throughout an esterification reaction between four different acetophenone oximes and the terphthaloyl chloride in a molar ratio of (2:1) under mild basic conditions. Spectroscopic techniques, such as IR, HNMR and mass spectrometer, were used to confirm the structures of the targeted oxime esters. The yields of the obtained oxime esters ranged from 80% to 95%.
Pesticide Residues in Pineapple Juice in Abidjan, Cote D’ivoire
Authors: AKE ASSI Yolande Epouse DATTE ; GNONSORO Urbain Paul ; KOUAKOU Konan Jean-Marie ; KPAN KPAN Kouakou Gains ; BIÉGO Godi Henri ; GNINGNINRI Hoglan Anne-Marie Lisette
The determination of pesticides in food products is an essential issue to guarantee food safety and minimize health risks of consumers. In this study, 30 pineapple juice samples were collected randomly from 30 seller through the city of Abidjan (Côte d’Ivoire) and analyzed for the determination of pesticide residues. The aim of the work was to quantify 30 commonly used pesticides (Metolachlor, Chlorpropham, Parathion-methyl, Chlorfenvinphos, Vinclozolin, Parathion-ethyl, Fenuron, Aldicarb, Metoxuron, Monuron, Methabenzthiazuron, Chlortoluron, Monolinuron, Isoproturon, Diuron, Metobromuron, Metazachlor, Buturon, Linuron, Prometryn, Terbutryn, Desisopropylatrazine, Desethylatrazine, Simazine, Cyanazine, Atrazine, Propazine, Terbuthylazine, Metamitron, Crimidine and Metolachlor) in real samples of pineapple juice. The method used for the determination of these analytes in the complex matrices was high-performance liquid chromatography with UV/Visible detector. Results obtained indicate that 30% of the investigated pineapple juices samples are free of pesticides residues or have a level below Limit Of Detection......
Ecological Risk Assessment of Mineral and Heavy Metals Levels of Soil Around Auto Mechanic Village Wukari, Nigeria
Authors: E. A. Yerima ; A. U. Itodo ; R. Sha’Ato ; R. A. Wuana
Environmental contamination is one of the serious challenge facing humanity and other life forms on our planet today. contamination occurs when contaminating substances exceeds their natural levels or when natural resources are use at a rate higher than nature’s capacity to restore itself. This study determines the levels of mineral element and potential toxic metals namely: P, K, Mg, Mn, Si, Fe, Zn, Cd, Pb and Al in agricultural soil around mechanic village Wukari-Nigeria. by means of MP-AES (4210 MP-AES Agilent technologies) while their pollution indices by means of geo-accumulation index and contamination factor. The results reveals that the mean ± standard deviation abundance of mineral and heavy metals in the soil was: Fe (20723.64±153.71), Al (3753.80±30.54) K (368.13±2.17), Mg (298.05±3.88), Mn (231.97±0.74), P (221.22±5.47), Zn (184.83±0.47), Pb (86.29±0.31), Si (64.27±0.43) and Cd (1.33±0.06). There was generally a significant difference between the concentration in the test and control sample (P < 0.05). While pollution indices show moderate to very high contamination of the soil by zinc, lead and cadmium signalling higher potential risk in terms of mobility on acidification since the organic content is moderate and soil texture being sandy-loam usually characterise with moderate capacity to immobilize heavy metals. Lead contamination can result in neurological and hematological dysfunctions, renal and hepatic damages as well as reproductive disorders in the humans while cadmium is known to have effect on kidney.