Journal of Chemical Research-s最新文献_第6页

A phytochemical investigation and evaluation of the antioxidant and antibacterial activities of the stem bark extract of Clematis simensis (Yeazo hareg) 铁线莲茎皮提取物抗氧化、抗菌活性的植物化学研究及评价

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221127398

Misganaw T. Ayana, Yekedem G Mehari, B. B. Beyene

{"title":"A phytochemical investigation and evaluation of the antioxidant and antibacterial activities of the stem bark extract of Clematis simensis (Yeazo hareg)","authors":"Misganaw T. Ayana, Yekedem G Mehari, B. B. Beyene","doi":"10.1177/17475198221127398","DOIUrl":"https://doi.org/10.1177/17475198221127398","url":null,"abstract":"Medicinal plants have been used for the treatment of various diseases and still play an important role in covering the basic health needs in the developing countries like Ethiopia. In this study, successive extraction, partial purification using column chromatograpy, phytochemical screening, determination of the total phenolic and flavonoid content, and the antioxidant and antibacterial activities of the petroleum ether, chloroform, and ethanol stem bark extracts and fractions of Clematis simensis are reported. The results show the presence of different valuable phytochemicals. The total phenolic content is 54.744, 68.933, and 87.522 mg g–1 of gallic acid equivalent for the petroleum ether, chloroform, and ethanol extracts, respectively. The total flavonoid content of the petroleum ether, chloroform, and ethanol extracts are 22.770, 37.223, and 52.289 mgCE g–1, respectively. This could lead to potential biological activity of the plant extract. Besides, the ethanol extract exhibits higher antioxidant activity than all the tested extracts. Likewise, the extracts have promising antibacterial activity with that of the ethanol extract being higher than those of the chloroform and petroleum extracts as well as isolated fractions.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78406574","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

Corrigendum to Novel spiroheterocycles containing a 1,3,4-thiadiazole unit: Synthesis and spectroscopic characterization. Journal of Chemical Research 46(July-Aug):1–6. DOI: 10.1177/17475198221109503 含有1,3,4-噻二唑的新型螺杂环化合物的勘误表:合成和光谱表征。化学研究46(7 - 8):1-6。DOI: 10.1177 / 17475198221109503

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221132137

引用次数: 0

A one-step method for preparing Cr-doped SiO2: An efficient catalyst for the direct oxidation of cyclohexane to ketone-alcohol oil 一步法制备掺铬SiO2:环己烷直接氧化制酮醇油的高效催化剂

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221131289

Xiao-zhong Wang, Kaicheng Xue, Cai Xu, Ying-qi Chen, Li-yan Dai

引用次数: 0

Synthesis, biological evaluation and molecular docking of N, N’-bis([1,2,4]triazole[4,3-b][1,2,4,5]tetrazine-6-yl)alkylamine derivatives as potent c-Met antagonists N, N ' -双([1,2,4]三唑[4,3-b][1,2,4,5]四氮-6-基)烷基胺衍生物的合成、生物学评价及分子对接

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221123516

Zhonglu Ke, Tianyun Pei, Zhenzhen Yang, Xuanhe Zhang, Feng Xu, Zihang Xu, Jixiang Ding

引用次数: 0

The design, synthesis, antioxidant, and antihypoxia activities of two new hydroxydaidzein derivatives 两种新的羟基大豆苷元衍生物的设计、合成及其抗氧化和抗缺氧活性

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221131528

Qingyue Da, Jin Shao, Pengpeng Zhang, J. Zhang, Huiping Ma, Linlin Jing

{"title":"The design, synthesis, antioxidant, and antihypoxia activities of two new hydroxydaidzein derivatives","authors":"Qingyue Da, Jin Shao, Pengpeng Zhang, J. Zhang, Huiping Ma, Linlin Jing","doi":"10.1177/17475198221131528","DOIUrl":"https://doi.org/10.1177/17475198221131528","url":null,"abstract":"7,8,3’,4’,5’-Pentahydroxyisoflavone (8,3’,5’-trihydroxydaidzein) and 6,7,8,3’,4’,5’-hexahydroxyisoflavone (6,8,3’,5’-tetrahydroxydaidzein) are synthesized via a simple and effective method using commercially available daidzein as a raw material. Their structures are confirmed using spectroscopic analyses (infrared, nuclear magnetic resonance, and mass spectrometry), and their purities are determined by high-performance liquid chromatography. The antioxidant capacities are investigated by utilizing 1,1-diphenyl-2-picryl-hydrazyl radical scavenging, superoxide radical scavenging, nitric oxide radical scavenging, reducing power, and phosphomolybdenum assays. The antihypoxia activity is examined using a hypoxia-induced PC12 cell injury model. The antioxidant and antihypoxia abilities of 8,3’,5’-trihydroxydaidzein and 6,8,3’,5’-tetrahydroxydaidzein are greatly improved in comparison with daidzein. These results indicate that 8,3’,5’-trihydroxydaidzein and 6,8,3’,5’-tetrahydroxydaidzein are excellent antioxidant agents and can be used for alleviating injury induced by hypoxia.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90383705","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

A Fe3O4 nanospheres/carbon core–shell structure for effective removal of pollutants from water 一种有效去除水中污染物的Fe3O4纳米球/碳核壳结构

Journal of Chemical Research-s Pub Date : 2022-09-01 DOI: 10.1177/17475198221120927

Huaqiang Tao, Yuxiang Wang, Beifeng Lv, Feifei Tao, W. Wang

{"title":"A Fe3O4 nanospheres/carbon core–shell structure for effective removal of pollutants from water","authors":"Huaqiang Tao, Yuxiang Wang, Beifeng Lv, Feifei Tao, W. Wang","doi":"10.1177/17475198221120927","DOIUrl":"https://doi.org/10.1177/17475198221120927","url":null,"abstract":"The treatment of wastewater by adsorption is a good alternative technique and attracts extensive attention worldwide due to its versatility, scalability, and low operational costs. In this work, a Fe3O4 nanospheres/carbon core–shell structure is fabricated by combination of a template method and calcination. The morphology and crystal structure of the synthesized composite are characterized by transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectrometer, and from nitrogen adsorption–desorption isotherms, confirming that the carbon layer with a porous structure is successfully loaded onto the surface of the face-centered cubic Fe3O4 nanospheres to form a core–shell structure. The adsorption performance of the Fe3O4 nanospheres/carbon core–shell structure is investigated by studying the effects of the initial pH value of the solution, the contact time, the initial concentration of the pollutants, the adsorption temperature, and the amount of adsorbent. The Fe3O4 nanospheres/carbon core–shell structure effectively removes heavy metal Chromium(VI) and a reactive light yellow dye. The results of batch experiments show that the removal efficiencies of heavy metal Chromium(VI) and the reactive light yellow dye are close to 100% under optimized conditions. The good adsorption performance of the Fe3O4 nanospheres/carbon core–shell structure toward various types of pollutants suggests a potential application in wastewater treatment.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87316051","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

Concanamycin H from the soil actinomycete Streptomyces sp. R1706-8 土壤放线菌链霉菌(Streptomyces sp. R1706-8)中的红霉素H

Journal of Chemical Research-s Pub Date : 2022-07-01 DOI: 10.1177/17475198221109161

Guoli Li, Huijing Qi, Yigang He, Yu-Kai Shen, Tong Shen

引用次数: 0

Doxorubicin-loaded Mn-doped SiO2 nanospheres coated with carboxymethyl chitosan: fabrication, characterization, and in vitro evaluation 羧甲基壳聚糖包覆负载多柔比星mn掺杂SiO2纳米球:制备、表征及体外评价

Journal of Chemical Research-s Pub Date : 2022-07-01 DOI: 10.1177/17475198221114617

Lili Ji, Han Zheng, Shuangyan Li, Dehui Li, Q. Gao, Jing Yang

引用次数: 1

Rapid and selective on-site detection of triacetone triperoxide based on visual colorimetric method 基于视觉比色法的快速选择性现场检测三过氧化三丙酮

Journal of Chemical Research-s Pub Date : 2022-07-01 DOI: 10.1177/17475198221117409

Yonggang Li, Xingsheng Liu, Guannan Zhang, Ruihua Wang, Ruimin Yue, Guangfu Liao, Zhenwen Sun, Yao Liu

{"title":"Rapid and selective on-site detection of triacetone triperoxide based on visual colorimetric method","authors":"Yonggang Li, Xingsheng Liu, Guannan Zhang, Ruihua Wang, Ruimin Yue, Guangfu Liao, Zhenwen Sun, Yao Liu","doi":"10.1177/17475198221117409","DOIUrl":"https://doi.org/10.1177/17475198221117409","url":null,"abstract":"In this work, a visual colorimetric method for the rapid and selective detection of triacetone triperoxide is reported. This visual colorimetric method is based on the reaction between potassium titanyl oxalate and hydrogen peroxide (H2O2) released from triacetone triperoxide degradation. Potassium titanyl oxalate can selectively react with H2O2 to form peroxo-titanic acid (an orange complex), enabling the colorimetric detection of triacetone triperoxide. Based on the theory that triacetone triperoxide produces hydrogen peroxide under acidic conditions, acid types, acid concentration, response time, visual limit of detection, and reactants ratio are systematically studied simultaneously for this colorimetric method. Under sulfuric acid concentration is 60%, the proposed method can almost detect triacetone triperoxide instantly, and the color of the solution reaches the maximum within 1 min and remains stable with a visual limit of detection as low as 3.0 × 10−5 mol/L. Interference experiments were carried out on other kinds of explosives (hexamethylene triperoxide diamine, trinitrotoluene, etc.). The use of colorimetric card brings great convenience to the rapid, qualitative, and semi-quantitative on-site detection of triacetone triperoxide. Because of its rapidity, high sensitivity, simplicity, and selectivity, the proposed visual colorimetric method can serve as a valuable and promising reference for triacetone triperoxide’s rapid, qualitative on-site detection.","PeriodicalId":15318,"journal":{"name":"Journal of Chemical Research-s","volume":"69 4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89120660","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: 4

Supramolecular chemistry of organoplatinum(IV) complexes: A syndiotactic polymer with uracil substituents 有机铂(IV)配合物的超分子化学:具有尿嘧啶取代基的同规聚合物

Journal of Chemical Research-s Pub Date : 2022-07-01 DOI: 10.1177/17475198221114610

Michael J Nieradko, R. Puddephatt

引用次数: 0