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Revista Virtual de Química最新文献

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A Brief Review of Sydnone Heterocyclic Ring Synthesis and Anti-Cancer Activity of its Derivatives 辛酮杂环合成及其衍生物抗癌活性综述
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220058
Igor Resendes Barbosa, A. Echevarria
{"title":"A Brief Review of Sydnone Heterocyclic Ring Synthesis and Anti-Cancer Activity of its Derivatives","authors":"Igor Resendes Barbosa, A. Echevarria","doi":"10.21577/1984-6835.20220058","DOIUrl":"https://doi.org/10.21577/1984-6835.20220058","url":null,"abstract":"Sydnones are among the most studied mesoionic compounds to date, especially for their unusual structure and utility to act as precursors in the synthesis of other important heterocycles though sydnone-alkyne and sydnone-alkene cycloaddition reactions. Also, many studies have been focused on the medicinal chemistry aspects of these compounds, revealing their wide range of biological activities. This article presents a brief discussion regarding the structure, reactivity, aromaticity, and synthesis of the heterocyclic sydnone ring (1,2,3-oxadiazolium ring). Also, different derivatives are presented, describing their anticancer activities and, in some cases, their possible mechanisms of action.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84944591","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
Carbon Nanostructures from Tailings: Synthesis, Characterization and Application in Dye Adsorption 尾矿碳纳米结构:合成、表征及其在染料吸附中的应用
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220096
Thaís Cristina de Oliveira Cândido, Rafaela Fernandes Ribeiro, Marden Pires Moura, Ana Paula de Carvalho Teixeira, Paula Sevenini Pinto
{"title":"Carbon Nanostructures from Tailings: Synthesis, Characterization and Application in Dye Adsorption","authors":"Thaís Cristina de Oliveira Cândido, Rafaela Fernandes Ribeiro, Marden Pires Moura, Ana Paula de Carvalho Teixeira, Paula Sevenini Pinto","doi":"10.21577/1984-6835.20220096","DOIUrl":"https://doi.org/10.21577/1984-6835.20220096","url":null,"abstract":"Sectors such as iron mining and the textile industry are of great importance to the economy, but their activities may be related to significant environmental problems, such as the generation of tailings and contaminants in the water, respectively. This work aimed the synthesis of carbon nanostructures by the CVD process, at 900 o C, using methane as carbon source, using two iron ore tailings for later application in the removal of dyes. The characterization of the materials indicated that the pure tailings had iron oxide phases that were transformed into α -Fe and γ -Fe after the CVD process. TG indicated 38.7 and 66.0% of carbon for RA CVD 900 and RL CVD 900, respectively, and Raman indicated the formation of graphitic and well-organized nanostructures. The adsorption results showed that all materials were able to adsorb methylene blue and carmine indigo dyes in aqueous solution, with removal rates of 85 and 53%, with RA CVD 900 being the best material for adsorption.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81902627","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
Analysis of substances involved in the synthesis of metallic complexes in the laboratory context of courses in chemistry in Brazil 在巴西化学课程的实验室背景下，分析金属配合物合成中涉及的物质
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220131
Luceli Roloff, Maria G. T. C. Ribeiro, Fauze J. Anaissi
{"title":"Analysis of substances involved in the synthesis of metallic complexes in the laboratory context of courses in chemistry in Brazil","authors":"Luceli Roloff, Maria G. T. C. Ribeiro, Fauze J. Anaissi","doi":"10.21577/1984-6835.20220131","DOIUrl":"https://doi.org/10.21577/1984-6835.20220131","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83237709","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
Silver Nanoparticles for Antibacterial Use: Extrinsic and Intrinsic Factors to Increase Stability 银纳米颗粒抗菌用途:增加稳定性的外在和内在因素
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220045
Gabriel Mustafá Misirli, Beatriz Ferreira de Carvalho Patricio, Shirley de Mello Pereira Abrantes
{"title":"Silver Nanoparticles for Antibacterial Use: Extrinsic and Intrinsic Factors to Increase Stability","authors":"Gabriel Mustafá Misirli, Beatriz Ferreira de Carvalho Patricio, Shirley de Mello Pereira Abrantes","doi":"10.21577/1984-6835.20220045","DOIUrl":"https://doi.org/10.21577/1984-6835.20220045","url":null,"abstract":"Recent studies with silver nanoparticles (AgNPs), a broad spectrum bactericidal and virucidal agent, place them as a promising ingredient in fighting the spread of multiresistant bacteria, viruses and neglected diseases, as well as other biological uses. In this review, we show the difference between the mechanisms of the AgNPs and silver ions (Ag + ) in the chemical, biological and toxicological level, as well as the augmented influence of the bactericidal activity in the facets {111}. To better understand the efficacy of the AgNPs as an antimicrobial agent, the mechanism of action of the AgNPs was analyzed in bacteria and viruses. Furthermore, we described intrinsic and extrinsic factors that directly affect the physical-chemical stability of AgNPs and are essential for their biological use, in future clinical studies and in the development of new products containing AgNPs.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83339733","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
Electrochemical Biosensors Based on Peroxidase: A Review 基于过氧化物酶的电化学生物传感器研究进展
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220127
Daniel Ananias, José G. Rocha Jr, Rosane N. Castro, Inês R. W. Z. de Oliveira
{"title":"Electrochemical Biosensors Based on Peroxidase: A Review","authors":"Daniel Ananias, José G. Rocha Jr, Rosane N. Castro, Inês R. W. Z. de Oliveira","doi":"10.21577/1984-6835.20220127","DOIUrl":"https://doi.org/10.21577/1984-6835.20220127","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77762915","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
Recent Advances in Polypyrrole Hydrogels: A Brief Review 聚吡咯水凝胶研究进展综述
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220016
Yslaine A. de Almeida, Iara de F. Gimenez
{"title":"Recent Advances in Polypyrrole Hydrogels: A Brief Review","authors":"Yslaine A. de Almeida, Iara de F. Gimenez","doi":"10.21577/1984-6835.20220016","DOIUrl":"https://doi.org/10.21577/1984-6835.20220016","url":null,"abstract":"In recent years, scientific research on new materials has gradually increased, most of which being part of our daily lives. Among these materials, we can focus on conductive polymers such as polypyrrole (PPy), which has a variety of properties, such as electrical conductivity, good chemical stability and excellent biocompatibility. This combination of properties for applications in the form of hydrogels enables a wide area of applications. Some of these hydrogels can be exemplified in this brief review containing explanatory topics to guide the proposed study. We evidenced that in the last 25 years, not only have scientific articles increased in research databases, but also requests for patent deposits.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77741922","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
Obtaining Mathematical Models Combined with Infrared Spectroscopy Data and the Use of Artemia salina as a Biological Indicator to Predict the Toxicity of the Biochars 结合红外光谱数据建立数学模型并利用盐蒿作为生物指标预测生物炭的毒性
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20230005
Jeferson B. Eilert, Flávia Carvalho Malta de Mello, E. Batista, J. Nicolini, K. Nicolini
{"title":"Obtaining Mathematical Models Combined with Infrared Spectroscopy Data and the Use of Artemia salina as a Biological Indicator to Predict the Toxicity of the Biochars","authors":"Jeferson B. Eilert, Flávia Carvalho Malta de Mello, E. Batista, J. Nicolini, K. Nicolini","doi":"10.21577/1984-6835.20230005","DOIUrl":"https://doi.org/10.21577/1984-6835.20230005","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90794123","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
Determination of Carbon Stocks of Humic Substances and Vulnerability to Emissions in Archaeological and Non-Archaeological Soils of the Central Amazon 亚马逊中部考古与非考古土壤腐殖质碳储量及其排放脆弱性测定
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220110
Ricardo Soares, David V. B. Campos, Beata E. Madari, Pedro Luiz O. A. Machado, John E. L. Maddock
{"title":"Determination of Carbon Stocks of Humic Substances and Vulnerability to Emissions in Archaeological and Non-Archaeological Soils of the Central Amazon","authors":"Ricardo Soares, David V. B. Campos, Beata E. Madari, Pedro Luiz O. A. Machado, John E. L. Maddock","doi":"10.21577/1984-6835.20220110","DOIUrl":"https://doi.org/10.21577/1984-6835.20220110","url":null,"abstract":"This is an open-access article distributed under the terms of the Creative Commons Attribution License. Rev. Virtual Quim., 2023, no prelo, 1-12 ©2023 Sociedade Brasileira de Química aInstituto Estadual do Ambiente (INEA). Avenida Venezuela, 110; CEP 20081-312, Saúde, Rio de Janeiro – RJ, Brasil. bUniversidade Veiga de Almeida (UVA). Rua Ibituruna, 108, Campus Tijuca, Maracanã, CEP 20271-020, Rio de Janeiro – RJ, Brasil. cUniversidade Federal Fluminense (UFF). Outeiro de São João Batista s/n°, Campus do Valonguinho, CEP 24020-150, Centro, Niterói – RJ, Brasil. dEmbrapa Solos. Rua Jardim Botânico 1024, CEP 22460-000, Jardim Botânico, Rio de Janeiro – RJ, Brasil. eEmbrapa Arroz e Feijão. Rodovia GO-462, km 12, Fazenda Capivara, Zona Rural, Caixa Postal 179 CEP 75375-000, Santo Antônio de Goiás – GO, Brasil.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78893600","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
Cellulose-Based Materials Crosslinked with Epichlorohydrin: A Mini Review 环氧氯丙烷交联纤维素基材料的研究进展
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20220071
Liliane O. Mota, Iara F. Gimenez
{"title":"Cellulose-Based Materials Crosslinked with Epichlorohydrin: A Mini Review","authors":"Liliane O. Mota, Iara F. Gimenez","doi":"10.21577/1984-6835.20220071","DOIUrl":"https://doi.org/10.21577/1984-6835.20220071","url":null,"abstract":"biopolymer attention by researchers in several different fields. Hydroxyl groups on cellulose chains can be chemically modified in order to improve physico-chemical properties enabling applications in different areas such as biomaterials for implants, removal of chemical components from water and hydrogels for the delivery of drugs and fertilizers. In this context, chemical crosslinkers may also bring advantages to cellulose-based materials and derivatives improving their thermal stability, surface area and swelling degree of hydrogels. Among many chemical crosslinkers, epichlorohydrin has been used in recent years to prepare materials based on cellulose and other biopolymers. Thus, here we aim to review recent works reporting cellulose-based materials crosslinked with epichlorohydrin in a comparative approach with other common agents such as glutaraldehyde and citric acid, their advantages and disadvantages as well as future prospects.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79046716","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: 8
Isolation and Quantification of the Main Prenylated Compounds from Brazilian Green Propolis with Antioxidant Properties 巴西绿蜂胶中主要抗氧化化合物的分离与定量分析
Revista Virtual de Química Pub Date : 2022-01-01 DOI: 10.21577/1984-6835.20230003
Lucas de O. Pires, Rosane N. Castro
{"title":"Isolation and Quantification of the Main Prenylated Compounds from Brazilian Green Propolis with Antioxidant Properties","authors":"Lucas de O. Pires, Rosane N. Castro","doi":"10.21577/1984-6835.20230003","DOIUrl":"https://doi.org/10.21577/1984-6835.20230003","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77091062","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
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