Journal of Nepal Chemical Society最新文献_第8页

Study of Jatropha Curcas Extract as a Corrosion Inhibitor in Acidic Medium on Mild Steel by Weight Loss and Potentiodynamic Methods 失重法和动电位法研究麻疯树提取物在酸性介质中对低碳钢的缓蚀剂作用

Journal of Nepal Chemical Society Pub Date : 2020-08-05 DOI: 10.3126/jncs.v41i1.30493

D. Gupta, KM Anita Kafle, A. Das, S. Neupane, A. Ghimire, B. Yadav, Y. Chaudhari, N. Karki, A. Yadav

引用次数: 7

Appraisal of Different Inorganic Inhibitors Action on the Corrosion Control Mechanism of Mild Steel in HNO3 Solution 不同无机缓蚀剂对低碳钢在HNO3溶液中的腐蚀控制机理的评价

Journal of Nepal Chemical Society Pub Date : 2020-08-05 DOI: 10.3126/jncs.v41i1.30489

Prakash Magrati, D. Subedi, D. Pokharel, J. Bhattarai

{"title":"Appraisal of Different Inorganic Inhibitors Action on the Corrosion Control Mechanism of Mild Steel in HNO3 Solution","authors":"Prakash Magrati, D. Subedi, D. Pokharel, J. Bhattarai","doi":"10.3126/jncs.v41i1.30489","DOIUrl":"https://doi.org/10.3126/jncs.v41i1.30489","url":null,"abstract":"Effects of eco-friendly inorganic inhibitors (i.e., calcium nitrate, zinc sulfate, sodium hexametaphosphate and sodium tetra-borate or borax) for the mild steel corrosion control in 1 M HNO3 solution open to air at 28±1 °C were studied using corrosion, inhibition efficiency, and corrosion potential tests. The corrosion rate of the mild steel is increased with increasing the concentrations of HNO3 solution from 0.01 M to 1 M. The uses of 200-2400 ppm of these inhibitors enhanced the corrosion resistance properties of the mild steel in 1 M HNO3 solution. The corrosion resistance property of the mild steel is generally decreased with increasing the concentration of all corrosion inhibitors used here. The most efficient corrosion inhibitor is found to be calcium nitrate and it is followed by zinc sulfate, sodium hexametaphosphate, and borax subsequently. Adsorption of these inorganic salts inhibitors on the mild steel surface obeyed Langmuir adsorption isotherm. Consequently, the corrosion inhibition mechanism of the four inorganic salts for the mild steel corrosion control can be explained based on the formation of the passive film. It is found from the corrosion potential measurement that the cathodic type of corrosion inhibition action was by calcium nitrate, whereas zinc sulfate, sodium hexametaphosphate, and borax are acted as a mixed type of the inhibitors in 1 M HNO3 solution. In summary, all four inorganic inhibitors utilized in the present study can be applied as an environmentally friendly inhibitor to control the corrosion of the mild steel in aggressive HNO3 solutions.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"1 1","pages":"64-73"},"PeriodicalIF":0.0,"publicationDate":"2020-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89168460","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: 2

Determination of Sun Protective Factor of Selected Medicinal Plants from Western Nepal 尼泊尔西部部分药用植物防晒因子的测定

Journal of Nepal Chemical Society Pub Date : 2020-08-05 DOI: 10.3126/jncs.v41i1.30487

S. Pradhan, K. Adhikari, Saroj Nepal, B. Pandey

引用次数: 2

Analysis of Piperine in Black Pepper by High Performance Liquid Chromatography 高效液相色谱法分析黑胡椒中的胡椒碱

Journal of Nepal Chemical Society Pub Date : 2020-08-05 DOI: 10.3126/jncs.v41i1.30492

S. Shrestha, Nibedita Chaudhary, R. Sah, Neera Malakar

引用次数: 4

Development of Biomass-Based Anion Exchanger for the Removal of Trace Concentration of Phosphate from Water 生物质基阴离子交换剂去除水中痕量磷酸盐的研制

Journal of Nepal Chemical Society Pub Date : 2020-08-05 DOI: 10.3126/jncs.v41i1.30488

B. R. Poudel, R. Aryal, Lokjan Bahadur Khadka, K. N. Ghimire, H. Paudyal, M. R. Pokhrel

{"title":"Development of Biomass-Based Anion Exchanger for the Removal of Trace Concentration of Phosphate from Water","authors":"B. R. Poudel, R. Aryal, Lokjan Bahadur Khadka, K. N. Ghimire, H. Paudyal, M. R. Pokhrel","doi":"10.3126/jncs.v41i1.30488","DOIUrl":"https://doi.org/10.3126/jncs.v41i1.30488","url":null,"abstract":"Aluminum loaded saponified mango waste i.e. Al(III)–SMW adsorbent, which functions as anion exchanger, was developed by loading Al(III) onto lime treated Mango waste biomass. The characterization of adsorbent was done by an Energy Dispersive X-ray (EDX) spectroscopy and chemical analysis techniques. Elemental analysis showed an exchange of Ca(II) or K (I) from SMW with Al(III) during loading reaction via cation exchange mechanism. Phosphate adsorption is strongly pH-dependent and maximum adsorption occurs at pH around 7-9. The maximum uptake capacity of Al(III)–SMW for phosphate was found to be 3.28 mg/g from the Langmuir isotherm model. The residual concentration of phosphate was sharply decreased by increasing the amount of Al(III)–SMW and reached less than 0.07 mg/L (from 9.7 mg/L) with the use of only 6 g/L of Al(III)–SMW whereas higher than 7 g/L successfully removed 100% of phosphate from water. The adsorbed phosphate was successfully desorbed and the adsorbent was regenerated using dilute alkali solution. Therefore, the Al(III)–SMW adsorbent investigated in this research work is expected to be a potential material for the treatment of water polluted with a trace amount of phosphate from aqueous solution.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"37 1","pages":"56-63"},"PeriodicalIF":0.0,"publicationDate":"2020-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75150836","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: 6

Estimation of Particle Size and Band Gap of Zinc Oxide Nanoparticle Synthesized by Chemical Precipitation Method 化学沉淀法合成氧化锌纳米颗粒粒径及带隙的估计

Journal of Nepal Chemical Society Pub Date : 2020-08-03 DOI: 10.3126/jncs.v41i1.30448

S. K. Gautam, Bibek Sapkota, Arun Bhujel, Sitaram Bhattarai

{"title":"Estimation of Particle Size and Band Gap of Zinc Oxide Nanoparticle Synthesized by Chemical Precipitation Method","authors":"S. K. Gautam, Bibek Sapkota, Arun Bhujel, Sitaram Bhattarai","doi":"10.3126/jncs.v41i1.30448","DOIUrl":"https://doi.org/10.3126/jncs.v41i1.30448","url":null,"abstract":"Zinc oxide (ZnO) nanoparticles were synthesized by chemical precipitation method using 0.1M and 0.3M [Zn(NO3)2.6H2O] and Na2CO3 solutions. The particle size and band gap of ZnO nanoparticles were estimated and effect of concentration on it was investigated. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy. The XRD result revealed that synthesized ZnO nanoparticles have pure hexagonal wurtzite structure and the particle size varies from 27.0 nm to 29.9 nm estimated by using Debye-Scherrer’s equation. The TEM image also projected the average particle size in the range of 20-30 nm and selected area electron diffraction (SAED) further verified the formation of hexagonal wurtzite structure. The FTIR result showed a broad absorption band related to Zn-O vibration band. The UV-visible absorption showed a red shift in the absorption edge with increasing concentration of Zn(NO3)2.6H2O solution. The sizes and band gaps of ZnO nanoparticles increased and decreased, respectively with increasing concentration of Zn(NO3)2.6H2O solution from 0.1M to 0.3M.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"43 1","pages":"46-50"},"PeriodicalIF":0.0,"publicationDate":"2020-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89396044","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

Synthesis, Characterization and Antibacterial Studies of (3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid-Cr (III) Complex (3,3-二甲基-7-氧-6-(2-苯乙酰胺)-4-硫-1-氮杂双环[3.2.0]庚烷-2-羧酸- cr (III)配合物的合成、表征及抗菌研究

Journal of Nepal Chemical Society Pub Date : 2020-07-29 DOI: 10.3126/jncs.v41i1.30370

I. Otuokere, U. Robert

{"title":"Synthesis, Characterization and Antibacterial Studies of (3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid-Cr (III) Complex","authors":"I. Otuokere, U. Robert","doi":"10.3126/jncs.v41i1.30370","DOIUrl":"https://doi.org/10.3126/jncs.v41i1.30370","url":null,"abstract":"Benzylpenicillin, also known as (3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0] heptane-2-carboxylic, is a common bactericidal antibiotic of the betalactamin family which is mostly used to treat infections caused by gram-positive bacterial strains and few gram-negative bacterial strains. Cr (III) complex of benzylpenicillin was synthesized by the reaction of benzylpenicillin with CrCl3.6H2O. The structure of the complex was confirmed through elemental analysis, electrical conductivity, FT-IR, electronic spectra, 1H-NMR, and 13C-NMR spectroscopic methods. The physical properties such as solubility, color and melting point were also determined for both the ligand and the complex. The complex has a deep green color. Both the ligand and the complex are ionic (236.0 and 126.0 Sm2.mol-1). From the spectroscopic result, the ligand behaved as a pentadentate ligand coordinating to the metal ion through OH, NH, C=O of amide, carboxylate& β-lactam. A trigonal bipyramidal geometry has been proposed for the metal complex. The prepared complex was evaluated in vitro for its antibacterial activity against some pathogenic gram-positive (Staphylococcus aureus, Bacillus substilis, Bacillus cereus, and Enterococcus faecalis) and gram-negative bacteria (Escherichia coli, Enterobacter cloacae, Pseudomonas aeruginosa and Campylobacter fetus). The metal complex showed enhanced antibacterial activity as compared to the uncomplexed ligand.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"32 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2020-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82924385","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

Anti-inflammatory, Anxiolytic and Antioxidant Property of Lactuca sativa L and Formulation of Microspheres Loaded Sustained Release Anti-inflammatory Gel 芥蓝抗炎、抗焦虑、抗氧化性能及微球负载缓释抗炎凝胶的制备

Journal of Nepal Chemical Society Pub Date : 2020-07-29 DOI: 10.3126/jncs.v41i1.30371

R. Gyawali, A. Ghimire, Apeksha Khatiwada, Prakshit Niraula, U. Sharma, Roshan Thapa

{"title":"Anti-inflammatory, Anxiolytic and Antioxidant Property of Lactuca sativa L and Formulation of Microspheres Loaded Sustained Release Anti-inflammatory Gel","authors":"R. Gyawali, A. Ghimire, Apeksha Khatiwada, Prakshit Niraula, U. Sharma, Roshan Thapa","doi":"10.3126/jncs.v41i1.30371","DOIUrl":"https://doi.org/10.3126/jncs.v41i1.30371","url":null,"abstract":"Anti-inflammatory and anxiolytic properties of Lactuca sativa L extract was evaluated by formalin induced mice paw edema test, and elevated plus maze animal model respectively. Solid microspheres containing dispersed extract were obtained by water-in-oil-in-water multiple emulsion system followed by solvent evaporation method. Optimization was carried out using Minitab 16 and optimized microspheres were loaded into a gel base. Anti-oxidant activity of optimized microspheres loaded gel was evaluated using DPPH (2,2-diphenyl1-picrylhydrazyl) assay. The gel was also evaluated for its physical properties, drug release kinetics and antiinflammatory activity using formalin induced mice-paw edema test where the anti-inflammatory potential was compared to marketed diclofenac gel (1.16% w/w). All doses of extract as well as microsphere loaded sustained release anti-inflammatory gel showed a dose and time dependent inhibition of edema (P<0.05), the extract also showed a dose dependent inhibition of level of anxiety (P<0.001). Potential anti-oxidant activity was seen with different concentration of crude extract and microsphere loaded gel. The anti-oxidant potential was compared using IC50 value which was 5.62 μg/mL, 6.34 μg/mL, 8.25 μg/mL for ascorbic acid, methanolic extract of L. sativa and microspheres loaded gel respectively.","PeriodicalId":16483,"journal":{"name":"Journal of Nepal Chemical Society","volume":"7 1","pages":"8-15"},"PeriodicalIF":0.0,"publicationDate":"2020-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87823975","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

Synthesis and Evaluation of Schiff Bases of 4-Amino-5-(chlorine substituted phenyl)-4H-1,2,4-triazole-3-thione as Antimicrobial Agents 抗菌药物4-氨基-5-(氯取代苯基)- 4h -1,2,4-三唑-3-硫酮席夫碱的合成及评价

Journal of Nepal Chemical Society Pub Date : 2020-07-29 DOI: 10.3126/jncs.v41i1.30373

Kishor Devkota, G. Pathak, B. Shakya

引用次数: 6

FTIR, GC-MS Analysis and Bioactivity Studies of Withania somnifera L. of Nepalese Origin 尼泊尔产苦参的FTIR、GC-MS分析及生物活性研究

Journal of Nepal Chemical Society Pub Date : 2020-07-29 DOI: 10.3126/jncs.v41i1.30374

S. Aryal, Sunita Shrestha, Anil Devkota, N. L. Bhandari, R. N. Jha

引用次数: 5