Advanced Journal of Chemistry-Section A最新文献_第3页

Advanced Journal of Chemistry-Section A Pub Date : 2019-07-01 DOI: 10.33945/SAMI/AJCA.2019.2.190202

A. Kumer, Nuruzzaman Sarker, Sunanda Paul, Afroza Zannat

引用次数: 31

Improving the Efficacy of Abamectin Using Neem Oil in Controlling Tomato Leafminers, Tuta absoluta (Meyrick). 用印楝油提高阿维菌素防治番茄小叶虫的效果。

Advanced Journal of Chemistry-Section A Pub Date : 2019-07-01 DOI: 10.33945/SAMI/AJCA.2019.2.216224

Daniel Tsingay Illakwahhi, B. Srivastava

引用次数: 4

Synthesis and characterization of new polymer systems containing indole 含吲哚新型聚合物体系的合成与表征

Advanced Journal of Chemistry-Section A Pub Date : 2019-07-01 DOI: 10.33945/SAMI/AJCA.2019.2.256265

M. H. Nasirtabrizi, Hamideh Saberi Khosroshahi

{"title":"Synthesis and characterization of new polymer systems containing indole","authors":"M. H. Nasirtabrizi, Hamideh Saberi Khosroshahi","doi":"10.33945/SAMI/AJCA.2019.2.256265","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.2.256265","url":null,"abstract":"Synthesis of some novel indole derivatives has been undertaken by the reaction of poly(maleic anhydride-co-styrene), P(MA-co-St), poly(maleic anhydride-co-chloromethyl styrene), P(MA-co-CMS), poly(maleic anhydride-co-methyl methacrylate), P(MA-co-MMAc) and poly(maleic anhydride-co-methacrylate) P(MA–co–MAc), copolymers with indole in the presence of NaH at -5oC. Compositions of the copolymers were obtained using related 1H NMR spectra and the polydispersity indices of the copolymers determined using gel permeation chromatography (GPC). The anhydride group possesses a higher reactivity with the indole group. The ring opening reaction between the anhydride group and the indole is simple and fast. All the resulted polymers were characterized by FT-IR and 1H NMR spectroscopic techniques. The glass transition temperature (Tg) of all the copolymers was determined by dynamic mechanical thermal analysis (DMTA). All the polymers containing indole groups showed a high glass transition temperature in comparison with the unmodified copolymers (I-IV). It was found that these polymers with indole moieties have high thermal stability and the presence of bulky indole groups in polymer side chains leads to an increase in the rigidity of polymers.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77894815","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}

引用次数: 0

Validated UV-Spectrophotometric Method for the Simultaneous Estimation of Pyridoxine Hydrochloride and Doxylamine Succinate in Bulk and in Pharmaceutical Dosage Form 紫外分光光度法同时测定原料药和制剂中盐酸吡哆醇和琥珀酸多西胺的含量

Advanced Journal of Chemistry-Section A Pub Date : 2019-07-01 DOI: 10.33945/SAMI/AJCA.2019.2.245255

Sangeetha Premkumar, Anandkumar Karunakaran, Vasanthi Murugesan, J. Munusamy, Ramesh Jayaprakash, R. Murugesan

{"title":"Validated UV-Spectrophotometric Method for the Simultaneous Estimation of Pyridoxine Hydrochloride and Doxylamine Succinate in Bulk and in Pharmaceutical Dosage Form","authors":"Sangeetha Premkumar, Anandkumar Karunakaran, Vasanthi Murugesan, J. Munusamy, Ramesh Jayaprakash, R. Murugesan","doi":"10.33945/SAMI/AJCA.2019.2.245255","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.2.245255","url":null,"abstract":"A new, simple, accurate and sensitive UV ‐ Spectrophotometric absorbance correction method has been developed for simultaneous determination of Pyridoxine Hydrochloride and Doxylamine Succinate in bulk and in combined tablet dosage form using distilled water as a solvent. The wavelengths selected for the analysis were 260 nm and 324 nm. Both Pyridoxine hydrochloride and Doxylamine Succinate were linear over the concentration range of 5 - 40 µg/ ml and 10 - 60 µg/ ml of Doxylamine Succinate and Pyridoxine hydrochloride, respectively. The percentage recovery was found to be in the range of 99.15 ‐ 100.71% for Pyridoxine Hydrochloride and 99.30 ‐ 101.99% for Doxylamine Succinate. The %RSD for recovery studies was found to be 0.5484 and 0.9071 for Pyridoxine hydrochloride and Doxylamine Succinate, respectively for. The low %RSD of recovery studies indicated that there is no interference due to excipients used in formulation. The amount of PYRI and DOXY was found to be 100.92% ± 0.6961 and 101.05% ± 0.7965. Optical characteristics like slope, intercept, molar absorptivity, correlation coefficient, LOD and LOQ were calculated. The developed method was validated statistically by recovery studies as per ICH guidelines. The % RSD value was found to be less than 2. Thus the proposed method was simple, precise, rapid and accurate and can be successfully applied for routine quality control analysis of simultaneous determination of Pyridoxine Hydrochloride and Doxylamine Succinate in bulk and in combined tablet dosage form.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85659550","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}

引用次数: 5

Metal-organic frameworks as precursor for metal oxide nanostructures Part I: MOF-derived copper oxide embedded in carbon matrix 金属有机骨架作为金属氧化物纳米结构的前驱体第一部分:mof衍生的铜氧化物嵌入碳基体

Advanced Journal of Chemistry-Section A Pub Date : 2019-07-01 DOI: 10.33945/SAMI/AJCA.2019.2.234244

C. A. Anyama, P. B. Ashishie, B. Inah, J. Mbonu, Ayi Ayi Anyama

{"title":"Metal-organic frameworks as precursor for metal oxide nanostructures Part I: MOF-derived copper oxide embedded in carbon matrix","authors":"C. A. Anyama, P. B. Ashishie, B. Inah, J. Mbonu, Ayi Ayi Anyama","doi":"10.33945/SAMI/AJCA.2019.2.234244","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.2.234244","url":null,"abstract":"Three isostructural metal-organic framework materials (MOFs) formulated as M[(HBTC)(H2O)]ˑH2O(M = Cu for 1, Zn for 2 and Ca for 3) constructed with 1, 3, 5-benzenetricarboxylate (BTC) were synthesised under hydro/solvothermal conditions. The three compounds were characterised on the basis of infrared and UV-Vis spectroscopy and the structure of 3 elucidated with the help of single-crystal x-ray crystallography. The UV-Vis spectrum of 1 exhibited a unique band at 511 nm. In the region 520 – 534 nm, the band splits into two moderately intense peaks at 527 and 531 nm. These absorption peaks along with other bands at 629 and 638 nm were assigned to d-d transitions of the copper (II) ion with distorted square planar geometry. The infrared spectra of the three compounds revealed that the ligand, BTC anion coordinated in a chelating and / or bridging mode to the metal center. The presence of absorption bands at 1699 cm-1 in 1 and 2, (1681 cm-1 in 3) can be attributed to protonated HBTC for 1-3. Single-crystal X-ray crystallographic studies of compound 3 revealed well-ordered structure with BTC ligand linking the individual chains to form a network structure. On heating Cu(HBTC)(H2O)ˑH2O up to 400oC, a copper-oxide embedded in carbon matrix was obtained with uniform particles of 10 -100 nm size.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91410248","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}

引用次数: 3

Prospects and Challenges of Using Coagulation-Flocculation method in the treatment of Effluents 混凝-絮凝法处理污水的前景与挑战

Advanced Journal of Chemistry-Section A Pub Date : 2019-04-01 DOI: 10.29088/SAMI/AJCA.2019.2.105127

K. Iwuozor

引用次数: 77

Qualitative and Quantitative Determination of Anti-Nutritional Factors of Five Wine Samples 5种葡萄酒样品中抗营养因子的定性和定量测定

Advanced Journal of Chemistry-Section A Pub Date : 2019-04-01 DOI: 10.29088/SAMI/AJCA.2019.2.136146

K. Iwuozor

引用次数: 16

Mineralogy and Pollution Status of Columbite-Tin Ore Contaminated Soil 铌锡矿污染土壤矿物学及污染现状

Advanced Journal of Chemistry-Section A Pub Date : 2019-04-01 DOI: 10.29088/SAMI/AJCA.2019.2.147164

A. Itodo, R. Wuana, Bulus Emmanuel Duwongs, D. D. Bwede

{"title":"Mineralogy and Pollution Status of Columbite-Tin Ore Contaminated Soil","authors":"A. Itodo, R. Wuana, Bulus Emmanuel Duwongs, D. D. Bwede","doi":"10.29088/SAMI/AJCA.2019.2.147164","DOIUrl":"https://doi.org/10.29088/SAMI/AJCA.2019.2.147164","url":null,"abstract":"Mining activities are one of the numerous ways by which man impacts on his environment. In this study, two non-destructive analytical techniques (XRF and XRD) were employed in the mineralogical characterization of Columbite-Tin ore and their contaminated soils. This investigates associated unnoticed minerals as well as the impact of mining on vicinity farmland soils on the Yelwa-Mbar mining site, Nigeria. The chemical characterization of Columbite ore using electron dispersive XRF revealed that most of the Columbite mineral deposits in the Plateau mining sites contain Niobium mineral in various proportions and vary from deposit to deposit depending on the geochemical composition of the minerals that formed the parent rock. Tin content as determined by ED-XRF impart that the ore can be utilized directly in the furnace because of its high cassiterite content (85.43%). The percentage elemental composition of soil around the mining vicinity unveiled the presence of Radionuclides K-40, Rubidium and Thorium in the soil. This is of great concern. The XRD mineralogical investigation of Columbite shows the presence of associated braunite, cassiterite, ilmenite, quartz, and zircon while the phase pattern for Tin ore confirmed the availability of cassiterite, magnetite and litharge. Pollution status based on contamination factor and geo-accumulation indices gave both radionuclides and heavy metal concentrations that depicts moderate to extreme contaminations.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87109048","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}

引用次数: 1

Importance of Microwave Heating In Organic Synthesis 微波加热在有机合成中的重要性

Advanced Journal of Chemistry-Section A Pub Date : 2019-04-01 DOI: 10.29088/SAMI/AJCA.2019.2.94104

S. Nain, Ruchi Singh, S. Ravichandran

引用次数: 44

Construction of modified carbon paste electrode by a new pantazene ligand for ultra-trace determination of ion silver in real samples 新型pantazene配体修饰碳糊电极的构建用于实际样品中离子银的超痕量测定

Advanced Journal of Chemistry-Section A Pub Date : 2019-03-26 DOI: 10.33945/SAMI/AJCA.2019.4.10

M. Payehghadr, Samaneh Salarvand, Farzaneh Nourifard, M. K. Rofouei, N. Bahramipanah

{"title":"Construction of modified carbon paste electrode by a new pantazene ligand for ultra-trace determination of ion silver in real samples","authors":"M. Payehghadr, Samaneh Salarvand, Farzaneh Nourifard, M. K. Rofouei, N. Bahramipanah","doi":"10.33945/SAMI/AJCA.2019.4.10","DOIUrl":"https://doi.org/10.33945/SAMI/AJCA.2019.4.10","url":null,"abstract":"A new ligand, 1,5-bis( para methoxyphenyl)-3- ethyl-1,4-pantaazadiene has been synthesized by reaction of the 4-methoxyaniline (p-anisidine) with ethylamine. The mixture was stirred in an ice bath for 30 min. The structure of the synthesized compound resulted from the IR and 1HNMR and 13CNMR. Afterwards, a carbon paste electrode modified with this new ligand was developed for the silver determination at nanomolar level concentration. The electerochemical properties of this modified electrode was investigated by employing cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods in an acetate buffer solution (pH=4.8). The effect of pH, scan rate, percentage of modifier and buffer as supporting electrolyte on the electrode process were investigated. The oxidation peak of Ag+ was observed at about 0.4- 0.5 V. The resulting electrode demonstrated linear response across a 10-9 to 10-8 mol.L-1 of silver concentration range with a detection limit value of 1.61×10-10mol.L-1, on the basis of a signal to noise ratio of 3. Relative Standard deviation (RSD%) of the electrode performance was 2.41%. This MCPE, were showed high sensitivity and selectivity to Ag+ ions in aqueous samples.","PeriodicalId":7207,"journal":{"name":"Advanced Journal of Chemistry-Section A","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74936993","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}

引用次数: 7