Modern Chemistry & Applications最新文献_第6页

Effect of Graphite and Copper Nano-Particles on Free Volume Properties of PVC/NBR Blends Studied by Pal Spectroscopy 用Pal光谱研究了石墨和铜纳米颗粒对PVC/NBR共混物自由体积性能的影响

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.35248/2329-6798.19.7.269

E. Gomaa, E. H. Ali

引用次数: 0

Level of Selected Elements in Hibiscus sabdariffa Calyces and Lippia asperifolia Leaves and Their Possible Effects on Human Blood Pressure 芙蓉花萼和柳叶中选定元素的含量及其对血压的影响

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.11648/j.mc.20190704.12

Abdul Ali Juma Mohamed, Ibrahim Ahmed Abass, Mayassa Salum Ally

引用次数: 0

Surface Engineering Effect on Optimizing Hydrogenation Timing of Green Hydrogenated Chitosan-Mediated CuO (H-Cht-CuO) for Cashew-kernel-oil Hydrogenation 表面工程对绿色氢化壳聚糖介导CuO (H-Cht-CuO)在腰果仁油加氢过程中加氢时间优化的影响

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.11648/j.mc.20190703.15

Joshua Lelesi Konne, Hamilton Amachree Akens, Arinze Amauche Uwaezuoke, Achu Golden Chiamaka

引用次数: 0

Chemical Studies of Tephrosia vogelii and Commiphora schimperi Occurring in Ethiopia 产自埃塞俄比亚的粗麻和细麻的化学研究

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.11648/j.mc.20190703.11

Tegene Tesfaye Tole, Belay Akino Neme

引用次数: 0

Tri-Carboxylic Acid Red Onion (Allium cepa) Skin Extract Resin for the Removal of Chromium (VI) Ion from Aqueous Solution 三羧酸红洋葱(Allium cepa)皮萃取树脂去除水溶液中铬(VI)离子

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.35248/2329-6798.19.7.266

Uzoamaka Iem, O. Chibuike, A. Onyewuchi

{"title":"Tri-Carboxylic Acid Red Onion (Allium cepa) Skin Extract Resin for the Removal of Chromium (VI) Ion from Aqueous Solution","authors":"Uzoamaka Iem, O. Chibuike, A. Onyewuchi","doi":"10.35248/2329-6798.19.7.266","DOIUrl":"https://doi.org/10.35248/2329-6798.19.7.266","url":null,"abstract":"This study investigates the removal of chromium (VI) ions from aqueous solution using resin synthesized by modifying red onion skin extract with a tri-carboxylic acid (citric acid). The performance of citric acid red onion skin extract resin (CRER) in the removal process was examined based on the effect of temperature (302 to 343 K), agitation time (10 to 60 min) and initial ion concentration (2 to 100 mg/L). Data analysis from agitation time experiments showed that equilibrium adsorption was attained within 30 min. Maximum percentage adsorption was observed at 313 K, while the percentage ion adsorbed increased with increase in initial concentrations of Cr (VI) ions. The experimental data were subjected to Langmuir, Freundlich and Temkin isotherm models evaluation; and the deductions from the correlation coefficient (R2) of the plots showed that Freundlich isotherm model represented the best fitting for the batch experiment. Thermodynamic parameters were determined and the results indicated that the sorption process was spontaneous with ΔG values as -9.433, -8.811, -7.745, -5.400 and -3.395 kJ/mol for 302, 313, 323, 333 and 343 K respectively. Adsorption with CRER was exothermic with respect to its negative ΔH (-55.610 KJ/ mol) value, while decrease in disorderliness of the adsorption system was reflected by the negative ΔS (-150.816 J/K/ mol) value. Pseudo-second order kinetic process was resolved for the reaction rate investigations, with the values of activation energy and pre-exponential factor as -118.167 kJ/mol and 5.749 × 10-17 g/mol/min respectively. Dubinin- Radushkevich isotherm model was used to evaluate the sorption mechanism, and it was observed that physisorption is the dominant mechanism for the reaction with the E values ranging from 6.51 to 6.95 kJ/mol at the different experimental temperatures.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"16 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79280291","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

Evaluation of the Acute and Sub-chronic Toxicity of the Ethanolic Extract of Curcuma longa (Zingiberaceae) in Wistar Albino Rats 姜黄醇提物对Wistar白化大鼠急性和亚慢性毒性的评价

Modern Chemistry & Applications Pub Date : 2019-01-01 DOI: 10.35248/2329-6798.19.7.267

D. Gatsing, G. T. Kamsu, S. P. Fodouop, R. S. Tagne, N. Kodjio, Adolette Lesly Nguelebek Fakam

{"title":"Evaluation of the Acute and Sub-chronic Toxicity of the Ethanolic Extract of Curcuma longa (Zingiberaceae) in Wistar Albino Rats","authors":"D. Gatsing, G. T. Kamsu, S. P. Fodouop, R. S. Tagne, N. Kodjio, Adolette Lesly Nguelebek Fakam","doi":"10.35248/2329-6798.19.7.267","DOIUrl":"https://doi.org/10.35248/2329-6798.19.7.267","url":null,"abstract":"Background: Commonly called \"two hundred diseases\" in Western Cameroon, Curcuma longa is a plant widely used in traditional medicine for many years. In order to evaluate the safety of this plant commonly use in the treatment of typhoid fever in Cameroon, the acute and Sub-chronic toxicity of the ethanolic extract of Curcuma rhizomes has been studied in albino rats of Wistar strain. Materials and methods: Acute and sub-acute toxicity of this extract were study using OCDE 2008 guidelines. Results: The physical parameters were recorded during the experiment and the hematological and biochemical parameters, as well as the histology of the liver and reproductive organs were carried out at the end of the experiment. The acute toxicity study revealed no toxic effects, no behavioural disturbances and no death in rats. The Sub-chronic toxicity study revealed an increase in feed intake and weight gain in male and female rats at test doses throughout the treatment period. A significant decrease of transaminase activity, serum creatinine level, LDL cholesterol level and the artherogenicity index in the test animals compared with the control were noted. Repeated administration of the extract also increased urinary creatinine levels, white blood cell counts, and HDL cholesterol levels. The extract kept a constant level of red blood cells in animals and had no visible effect on the reproductive organs of male and female rats. Conclusion: This extract can therefore be used for the formulation of phytomedicine against typhoid fever at the therapeutic dose of 30 mg/kg used by traditional practitioners.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"4 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82084356","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: 15

Antimicrobial properties of plasmonic metal decorated/doped titanium dioxide photocatalytic films 等离子体金属修饰/掺杂二氧化钛光催化膜的抗菌性能

Modern Chemistry & Applications Pub Date : 2018-12-05 DOI: 10.4172/2329-6798-C2-012

pPardon Nyamukambap

引用次数: 0

Antioxidant Edible Mushrooms: A Green and Rapid Electrochemical Study with the Aqueous Extracts 抗氧化食用菌:水提物绿色快速电化学研究

Modern Chemistry & Applications Pub Date : 2018-02-08 DOI: 10.4172/2329-6798.1000247

Priyankar Maji, S. Basu, B. Banik, J. Ganguly

{"title":"Antioxidant Edible Mushrooms: A Green and Rapid Electrochemical Study with the Aqueous Extracts","authors":"Priyankar Maji, S. Basu, B. Banik, J. Ganguly","doi":"10.4172/2329-6798.1000247","DOIUrl":"https://doi.org/10.4172/2329-6798.1000247","url":null,"abstract":"A greener and rapid electrochemical technique was performed by indium doped tin oxide (ITO) glasses as working electrode in cyclic and differential pulse voltammetry to screen the antioxidant activities of the aqueous extracts of different species of edible mushrooms Plureotus florida, Calocybe indica and Tricholoma gigantum found in West Bengal. The ITO glasses as electrode was very sensitive for the detection of electrical potentiality with 10 μl of 20 μg/ml (volume and concentration) concentration in phosphate buffer (pH 7.0) for the isolated aqueous extracts of mushrooms along with ascorbic acid and gallic acid as standards. In addition to the electrochemical study, the spectrophotometric assays were used to evaluate the antioxidant constituents, their reducing power and free radical scavenging ability of the extracts. The results obtained from both electrochemical and spectrophotometrical assays were in good agreement to each other for the detectable and significant range of antioxidant potentiality of these extracts. The present electrochemical ITO electrode method is a greener, efficient, cost effective, recyclable, and less cumbersome for detection of antioxidant properties of mushrooms compared to the other available electrochemical techniques.","PeriodicalId":18605,"journal":{"name":"Modern Chemistry & Applications","volume":"502 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2018-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78138217","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

Iodine-Catalyzed Microwave-Induced Multicomponent Aza-Diels Alder [4+2] Cycloaddition Reaction: A Versatile Approach Towards Bicyclo-[2,2,2]-Octanones 碘催化微波诱导多组分Aza-Diels Alder[4+2]环加成反应:合成双环-[2,2,2]辛酮的通用方法

Modern Chemistry & Applications Pub Date : 2018-01-01 DOI: 10.4172/2329-6798.1000253

R. N. Yadav, Ashwini Bobbala, B. Banik

引用次数: 3

Novel Glycosylation of Aromatic Amines Through 1, 2-Anhydrosugars 芳香胺通过1,2 -无水糖的新型糖基化

Modern Chemistry & Applications Pub Date : 2018-01-01 DOI: 10.4172/2329-6798.1000259

R. N. Yadav, B. Banik

引用次数: 0