Revista Virtual de Química最新文献_第4页

Study of the Composition of Fractions of Manipueira: Solid and Liquid Residues Filtered on 0.45 µm Membrane and Qualitative Paper 0.45µm膜和定性纸过滤马尼普埃拉液、固渣组分的研究

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230029

Ingrid Karen Lira Melo, Maria Célia Tavares, João Paulo Tenório da Silva Santos, Janesmar Camilo de Mendonça Cavalcanti, W. Botero, V. Del Colle

{"title":"Study of the Composition of Fractions of Manipueira: Solid and Liquid Residues Filtered on 0.45 µm Membrane and Qualitative Paper","authors":"Ingrid Karen Lira Melo, Maria Célia Tavares, João Paulo Tenório da Silva Santos, Janesmar Camilo de Mendonça Cavalcanti, W. Botero, V. Del Colle","doi":"10.21577/1984-6835.20230029","DOIUrl":"https://doi.org/10.21577/1984-6835.20230029","url":null,"abstract":"Cassava, is an important crop in the national agricultural and economic scenario. Its processing generates waste, such as manipueira, which has several applications but can cause environmental impact when improperly disposed of. This work aimed to evaluate the physicochemical characteristics of manipueira in different fractions (suspended solid, filtered at 0.45 μm, and in a common filter). The fractions were characterized physicochemically (pH and conductivity) and chemically using the following techniques: i) total organic carbon (TOC), ii) elemental analysis (CNHS), iii) MP-AES and infrared atomic emission spectrometry iv) SCP and AGNES. The resulting TOC values reflect a potential for the application of the material as a biofertilizer. The pH of manipueira is outside the standard established by Brazilian legislation. The metals Ba, Cd, Ni and Pb, and Zn, from the filtrate at 0.45 μm, are within the maximum limits established by CONAMA 430/2011resolution, while Cr, in the two filtrates, and Zn from the filtrate of the common filter, is above the maximum limits. Using SCP and AGNES it was possible to determine the presence of Pb in the solid residue as well as in the samples filtered at 0.45 μm, indicating the necessity of adequate treatment of the effluent before discard.","PeriodicalId":21315,"journal":{"name":"Revista Virtual de Química","volume":"175 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91532454","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

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

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

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

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

引用次数: 0

Catalytic Hydrogenation Reactions of Lignocellulosic Biomass-derived Compounds as a Strategy to Obtain Value-added Products 木质纤维素生物质化合物的催化加氢反应是获得高附加值产品的一种策略

Revista Virtual de Química Pub Date : 2023-01-01 DOI: 10.21577/1984-6835.20230016

Daniel G. S. Quattrociocchi, Thiago de M. Lima

引用次数: 0

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

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

引用次数: 1