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Revista Virtual de Química最新文献

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Use of Remote Sensing and Chemometrics as Tools to Estimate Parameters of Water Quality in Intermittent Lakes of the Lower Doce River 基于遥感和化学计量学的多斯河下游间歇湖泊水质参数估算
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230015
Luis Guilherme Rodrigues Miranda, Karla Pereira Rainha, Pedro Henrique Pereira da Cunha, Hudson Costa Oliveira, Gilberto Fonseca Barroso, P. Filgueiras, Eustáquio Vinicius Ribeiro de Castro
{"title":"Use of Remote Sensing and Chemometrics as Tools to Estimate Parameters of Water Quality in Intermittent Lakes of the Lower Doce River","authors":"Luis Guilherme Rodrigues Miranda, Karla Pereira Rainha, Pedro Henrique Pereira da Cunha, Hudson Costa Oliveira, Gilberto Fonseca Barroso, P. Filgueiras, Eustáquio Vinicius Ribeiro de Castro","doi":"10.21577/1984-6835.20230015","DOIUrl":"https://doi.org/10.21577/1984-6835.20230015","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85215062","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
Chemical Profile by UPLC-HRMS and Antifungal and Antioxidant Activity of Marine Macroalgae Dictyota menstrualis UPLC-HRMS化学成分分析及抗真菌和抗氧化活性研究
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230044
Thalisia C. dos Santos, Johanna M. C. Obando, Roberto C. C. Martins, Marina A. Alves, Roberto C. Villaça, Levi P. Machado, Maria Cândida de G. Gasparoto, Diana N. Cavalcanti
{"title":"Chemical Profile by UPLC-HRMS and Antifungal and Antioxidant Activity of Marine Macroalgae Dictyota menstrualis","authors":"Thalisia C. dos Santos, Johanna M. C. Obando, Roberto C. C. Martins, Marina A. Alves, Roberto C. Villaça, Levi P. Machado, Maria Cândida de G. Gasparoto, Diana N. Cavalcanti","doi":"10.21577/1984-6835.20230044","DOIUrl":"https://doi.org/10.21577/1984-6835.20230044","url":null,"abstract":"The brown macroalgae Dictyota menstrualis constitutes an organism with a rich and diverse metabolism in terms of the chemistry of natural products. It is known to mainly produce diterpenes, in addition to sterols, vitamins and polysaccharides with antiviral, anti-inflammatory, anticoagulant and antioxidant properties. Despite its vast metabolic arsenal, most studies are directed to the identification of already known diterpenes, opening the field of investigation for new approaches and discoveries. Knowing this, this work aims to chemically characterize the macroalgae D. menstrualis through the technique of Ultra Efficiency Liquid Chromatography associated with High-Resolution Mass Spectrometry (UPLC-HRMS) and perform a biological screening of potential antioxidants and antifungals through bioautography. For this, specimens of D. menstrualis were collected in the São Pedro São Paulo Archipelago (PE, Brazil) and attended to ingestion with dichloromethane and fractionation by column chromatography with silica gel. The extract and fractions were then analyzed by UPLC-HRMS with ElectroSpray Ionization (ESI) in positive mode. In addition, bioautography assays were performed to evaluate the antioxidant potential with DPPH and the antifungal potential against the Cladosporium sphaerospermum . The UPLC-HRMS analyzes allowed identifying diterpenes, sterols, faty acids, glycerolipids, derivatives of photosynthetic pigments and carotenoids. Bioautography assays suggested antifungal and antioxidant potential of the organic extract and fractions. Thus, the results suggest that D. menstrualis has pharmacological potential to be explored and that studies on its chemical composition using modern techniques such as UPLC-HRMS can lead to the discovery of new structures and reinforcement of the knowledge of the chemistry of this algae.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135501997","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
46th Annual Meeting of the Brazilian Chemical Society. Chemistry: Linking sciences a neutralizing inequalities (100 years of acid-base theories) 巴西化学学会第46届年会。化学:连接科学和中和不平等(酸碱理论的100年)
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230036
Luiz Gonzaga de França Lopes
{"title":"46th Annual Meeting of the Brazilian Chemical Society. Chemistry: Linking sciences a neutralizing inequalities (100 years of acid-base theories)","authors":"Luiz Gonzaga de França Lopes","doi":"10.21577/1984-6835.20230036","DOIUrl":"https://doi.org/10.21577/1984-6835.20230036","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91234804","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
Synthetic Pesticides: Heroes or Villains in the Search for a Hunger-Free Future? 合成农药:追求无饥饿未来的英雄还是恶棍?
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230001
Marcela Cristina de Moraes, Carolina Guimarães de Souza Lima
{"title":"Synthetic Pesticides: Heroes or Villains in the Search for a Hunger-Free Future?","authors":"Marcela Cristina de Moraes, Carolina Guimarães de Souza Lima","doi":"10.21577/1984-6835.20230001","DOIUrl":"https://doi.org/10.21577/1984-6835.20230001","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"615 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76261662","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
Goji Berry Extract As Inhibitor of ABNT 1020 Carbon Steel Corrosion in H2SO4 枸杞提取物对ABNT 1020碳钢在H2SO4中的缓蚀作用
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230042
Danielle Cristina Silva Oliszeski, Lucas Augusto Aguiar das Neves, Everson do Prado Banczek, Gideã Taques Tractz, Paulo Rogério Pinto Rodrigues
{"title":"Goji Berry Extract As Inhibitor of ABNT 1020 Carbon Steel Corrosion in H2SO4","authors":"Danielle Cristina Silva Oliszeski, Lucas Augusto Aguiar das Neves, Everson do Prado Banczek, Gideã Taques Tractz, Paulo Rogério Pinto Rodrigues","doi":"10.21577/1984-6835.20230042","DOIUrl":"https://doi.org/10.21577/1984-6835.20230042","url":null,"abstract":"Corrosion is a spontaneous process that affects the metallic surface, causing environmental and financial damages due to the early replacement of parts. One way to protect metals from corrosion is by applying corrosion inhibitors that act through adsorption on the metal surface, blocking/reducing corrosive processes. Conventional corrosion inhibitors are toxic to the environment and human life, so natural products are tested in order to replace toxic inhibitors. In this work, the aqueous extract of Goji Berry (GB) was tested as a corrosion inhibitor of carbon steel ABNT1020 in H 2 SO 4 0,5 mol L -1 medium. The gravimetric tests showed that the efficiency of the extract diluted at 75% V/V is 98%. The electrochemical results corroborate the data from the gravimetric test, since for the same extract dilution, higher values of resistance to charge transfer and lower values of current density were observed, which proves that the Goji Berry can be used as a corrosion inhibitor of carbon steel in these conditions, as it is reducing corrosive processes.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"25 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91501010","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
Chemistry and Circularity 化学与循环
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230051
Ana Lúcia de Lima, Aline Domingos Gonçalves, Daniella Rodrigues Fernandes, Thiago Custódio dos Santos, Claudio J. A. Mota
{"title":"Chemistry and Circularity","authors":"Ana Lúcia de Lima, Aline Domingos Gonçalves, Daniella Rodrigues Fernandes, Thiago Custódio dos Santos, Claudio J. A. Mota","doi":"10.21577/1984-6835.20230051","DOIUrl":"https://doi.org/10.21577/1984-6835.20230051","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135956728","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
In vitro Antimollicute Properties of Rosmarinus officinalis Extract 迷迭香提取物的体外抗乳酸特性研究
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230050
Debora H. Mafra, Italo R. Garcia, Giovana Vieira, Alessandro Guedes, Caio M. M. De Cordova
{"title":"In vitro Antimollicute Properties of Rosmarinus officinalis Extract","authors":"Debora H. Mafra, Italo R. Garcia, Giovana Vieira, Alessandro Guedes, Caio M. M. De Cordova","doi":"10.21577/1984-6835.20230050","DOIUrl":"https://doi.org/10.21577/1984-6835.20230050","url":null,"abstract":"Rosmarinus officinalis is a widely studied plant, although its activity against bacteria of the Mollicutes class is lacking. We evaluated the antibacterial potential R. officinalis extracts and fractions against different Mycoplasma species. The most active fractions were the hexane and dichloromethane ones, with MIC of 15.62 µg mL -1 against M. capricolum and the hexane fraction with MIC of 15.62 µg mL -1 against M. pneumoniae . Subfractions were obtained by silica column chromatography, with MIC of 31.25 µg mL -1 against M. capricolum and 62.5 µg mL -1 against M. pneumoniae . Purified subfractions or the isolated compound betulinic acid did not show better activity.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136004365","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
Bioelectrochemical Systems: Microbial Electrolysis Cell for Hydrogen Production 生物电化学系统:用于制氢的微生物电解池
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230055
Alex S. Castro, Valeria Reginatto, Adalgisa R. de Andrade
{"title":"Bioelectrochemical Systems: Microbial Electrolysis Cell for Hydrogen Production","authors":"Alex S. Castro, Valeria Reginatto, Adalgisa R. de Andrade","doi":"10.21577/1984-6835.20230055","DOIUrl":"https://doi.org/10.21577/1984-6835.20230055","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135212241","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
UV Spectroscopy and Digital Image to Estimate the Antioxidant Capacity and Proline Content of Honeys Produced by Native Bees 紫外光谱和数字图像估计本地蜜蜂生产的蜂蜜的抗氧化能力和脯氨酸含量
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230024
Maidelen Del Carmen Lozano Guerrero, Marina Duartes Fernandes de Souza Lima, Camila Acorone, Eliane Sloboda Rigobello, P. Valderrama, Yohandra Reyes Torres
{"title":"UV Spectroscopy and Digital Image to Estimate the Antioxidant Capacity and Proline Content of Honeys Produced by Native Bees","authors":"Maidelen Del Carmen Lozano Guerrero, Marina Duartes Fernandes de Souza Lima, Camila Acorone, Eliane Sloboda Rigobello, P. Valderrama, Yohandra Reyes Torres","doi":"10.21577/1984-6835.20230024","DOIUrl":"https://doi.org/10.21577/1984-6835.20230024","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78795011","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
Huanglongbing: What is Known So Far About the Greatest Threat to the World‘s Citrus Industry? 黄龙冰:到目前为止，世界柑橘产业面临的最大威胁是什么?
Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230021
João Guilherme de Moraes Pontes, Hellen Bertoletti Barbieri, Alan K. Pereira, Marina Ferreira Maximo, Aline Midori Kanashiro, Nelson Arno Wulf, Taicia Pacheco Fill
{"title":"Huanglongbing: What is Known So Far About the Greatest Threat to the World‘s Citrus Industry?","authors":"João Guilherme de Moraes Pontes, Hellen Bertoletti Barbieri, Alan K. Pereira, Marina Ferreira Maximo, Aline Midori Kanashiro, Nelson Arno Wulf, Taicia Pacheco Fill","doi":"10.21577/1984-6835.20230021","DOIUrl":"https://doi.org/10.21577/1984-6835.20230021","url":null,"abstract":"","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88957203","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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