Quimica Nova最新文献_第8页

ONE-POT SYNTHESIS OF A REVERSIBLE AND SENSITIVE FLUORESCENT PROBE FOR THE DETECTION OF MALACHITE GREEN 一锅法合成一种检测孔雀石绿的可逆灵敏荧光探针

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170947

Jinfeng Zhou, Chun-Yao Chu

{"title":"ONE-POT SYNTHESIS OF A REVERSIBLE AND SENSITIVE FLUORESCENT PROBE FOR THE DETECTION OF MALACHITE GREEN","authors":"Jinfeng Zhou, Chun-Yao Chu","doi":"10.21577/0100-4042.20170947","DOIUrl":"https://doi.org/10.21577/0100-4042.20170947","url":null,"abstract":"In this work, a recyclable and sensitive fluorescent nanoprobe, RhoB@ZIF-8 composite, has been designed and successfully synthesized by encapsulating rhodamine B (abbreviated as RhoB) into the cavities of zeolitic imidazolate framework-8 (ZIF-8) metal-organic frameworks (MOFs) through a facile one-pot method under mild conditions. The RhoB@ZIF-8 composite exhibited an emission band at 589 nm with fluorescent quantum yield of 19.8%. Since there was an efficient overlap between the absorption of malachite green (MG) and the fluorescence spectra (excitation and emission bands) of RhoB@ZIF-8 composite, the fluorescence intensity decreased sharply after MG was added. The fluorescence quenching was linear with the concentration of MG in the range of 0 to 13.0 μM with a low limit of detection (LOD) of 0.089 μM. Remarkably, this proposed sensing system has good performances including high specificity, good stability and recyclability. Finally, this fluorescent probe was successfully applied to the detection of MG in aquaculture water and fish tissue samples, revealing its potential practicability. This work will provide us a new research platform for MG sensing.","PeriodicalId":49641,"journal":{"name":"Quimica Nova","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68268079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FENILPROPANOIDES COM AÇÃO ANTI-Trypanosoma cruzi ISOLADOS DE Baccharis ligustrina C. DC. (ASTERACEAE) 从ligustrina C. DC分离出具有抗克氏锥虫作用的苯丙素。(菊花)

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170953

M. Silva, Leila Gimenes, Paulete Romoff, Marisi Soares, Fernanda Camilo, Erica Levatti, A. Tempone, J. H. Lago

{"title":"FENILPROPANOIDES COM AÇÃO ANTI-Trypanosoma cruzi ISOLADOS DE Baccharis ligustrina C. DC. (ASTERACEAE)","authors":"M. Silva, Leila Gimenes, Paulete Romoff, Marisi Soares, Fernanda Camilo, Erica Levatti, A. Tempone, J. H. Lago","doi":"10.21577/0100-4042.20170953","DOIUrl":"https://doi.org/10.21577/0100-4042.20170953","url":null,"abstract":"ANTI-Trypanosoma cruzi PHENYLPROPANOIDS ISOLATED FROM Baccharis ligustrina C. DC. (ASTERACEAE). In the present work, dried aerial parts of Baccharis ligustrina (Asteraceae) were subjected to microwave assisted extraction (MAE) using aqueous solution of 1-butyl-3-methylimidazolium bromide (BMImBr) and the obtained extract was successively partitioned using hexane and EtOAc. Using reduced amounts of extracts and efficient chromatographic steps, four acyl C6C3 derivatives (n-hexacosyl ferulate, n-hexacosyl, n-octacosyl, and n-triacontyl p-coumarates) were obtained from hexane phase whereas two C6C3 acids (ferulic and p-coumaric) were obtained from EtOAc phase. Isolated phenylpropanoids were evaluated against amastigote forms of parasite Trypanosoma cruzi. As result, it was observed that p-coumaric and ferulic acids were inactives whereas alkyl derivatives displayed EC50 values of 6.5 µmol L-1 (n-octacosyl p-coumarate), 9.3 µmol L-1 (n-triacontyl p-coumarate), 15.7 µmol L-1 (n-hexacosyl p-coumarate), and 32.2 µmol L-1 (n-hexacosyl ferulate). All tested compounds displayed reduced toxicity against NCTC cells (CC50 > 200 mmol L-1).","PeriodicalId":49641,"journal":{"name":"Quimica Nova","volume":"23 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68268362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

FUNCIONALIZAÇÃO DE LIGAÇÕES C—H EM ESTÁGIO TARDIO EM SÍNTESE ORGÂNICA 有机合成中C - H键的功能化

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170949

E. Rocha, Yasmin Salmazo, Marcio Hayashi, César Zaragoza, Emilio Lucca

引用次数: 0

FÓSSEIS MOLECULARES DA MATÉRIA ORGÂNICA SILURIANA DA FORMAÇÃO TIANGUÁ (BACIA DO PARNAÍBA), NORDESTE DO BRASIL: IMPLICAÇÕES PALEOAMBIENTAIS E MATURAÇÃO TÉRMICA 巴西东北部tiangua组志同道合有机物分子化石(parnaiba盆地):古环境影响与热成熟

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170945

Iara Silva, Michel Chaves, A. Brito, A. Nogueira, Sidney de Lima

{"title":"FÓSSEIS MOLECULARES DA MATÉRIA ORGÂNICA SILURIANA DA FORMAÇÃO TIANGUÁ (BACIA DO PARNAÍBA), NORDESTE DO BRASIL: IMPLICAÇÕES PALEOAMBIENTAIS E MATURAÇÃO TÉRMICA","authors":"Iara Silva, Michel Chaves, A. Brito, A. Nogueira, Sidney de Lima","doi":"10.21577/0100-4042.20170945","DOIUrl":"https://doi.org/10.21577/0100-4042.20170945","url":null,"abstract":"MOLECULAR FOSSILS FROM SILURIAN ORGANIC MATTER OF THE TIANGUÁ FORMATION (PARNAÍBA BASIN), NORTHEASTERN BRAZIL: PALEOENVIRONMENTAL IMPLICATIONS AND THERMAL MATURATION. The Parnaíba Basin covers an area of 665,888 km2 between the northern and northeastern regions of Brazil. It is completely made up of siliciclastic sedimentary and volcanic rocks with ages varying between the Silurian and the Cretaceous. Among the formations of the Basin, the Tianguá Formation is considered a potential source rock. However, there are few geochemical and/or geological studies and no research work on the molecular parameters of the organic matter (OM) present in its outcropping rocks (OR). Thus, the objective of the present work is to characterize the OM, concerning the depositional paleoenvironment and the degree of thermal evolution, through molecular parameters and OM content. The OM was extracted using the Soxhlet system, chromatographed by classical methods, and analyzed using GC-MS and GC-MS/MS. The samples exhibited low total organic carbon values (TOC <1) and the molecular parameters of saturated and aromatic hydrocarbons suggested a marine depositional environment, with algae, bacteria, and terrestrial plants input. The C30 biomarkers (24-n-propylcholestane), identified using synthetic standards and usually associated with the Chrysophyte algae, corroborated the marine origin of the depositional environment. In addition, some molecular parameters suggested little thermal evolution.","PeriodicalId":49641,"journal":{"name":"Quimica Nova","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68267884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AN ACCESSIBLE GLOVE BOX PROJECT FOR PROCEDURES THAT REQUIRE INERT CONDITIONS 一个可访问的手套箱项目，用于需要惰性条件的程序

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170966

Pedro Pereira, Jean de Andrade, Pedro Maia, G. Malpass

引用次数: 0

REDUCING NON-SPECIFIC ADSORPTION OF PROTEINS VIA THE HPG MODIFICATION ON THE SURFACE OF MAGNETIC NANOPARTICLES 通过HPG修饰磁性纳米颗粒表面减少蛋白质的非特异性吸附

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170950

Mengbo Zhou, Chunyu Sun, Hong Zhao

引用次数: 0

CURRÍCULO MÍNIMO VERSUS DIRETRIZES NACIONAIS DE CURSO: CAMINHOS DIVERGENTES NA FORMAÇÃO DOS PROFISSIONAIS DA QUÍMICA 最低课程与国家课程指南:化学专业人员形成的不同路径

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170944

S. Machado, Carlos Cortes, R. Almada

引用次数: 0

AVALIAÇÃO DE COMPOSTOS ORGÂNICOS VOLÁTEIS AROMÁTICOS NA ATMOSFERA EM CAMPOS DOS GOYTACAZES E ITAPERUNA APLICANDO A ANÁLISE MULTIVARIADA DE DADOS 应用多元数据分析对CAMPOS DOS GOYTACAZES和ITAPERUNA大气中挥发性有机化合物的评价

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170952

H. Vieira, A. Figueiredo, Murilo Souza, M. Canela

{"title":"AVALIAÇÃO DE COMPOSTOS ORGÂNICOS VOLÁTEIS AROMÁTICOS NA ATMOSFERA EM CAMPOS DOS GOYTACAZES E ITAPERUNA APLICANDO A ANÁLISE MULTIVARIADA DE DADOS","authors":"H. Vieira, A. Figueiredo, Murilo Souza, M. Canela","doi":"10.21577/0100-4042.20170952","DOIUrl":"https://doi.org/10.21577/0100-4042.20170952","url":null,"abstract":"EVALUATION OF AROMATIC VOLATILE ORGANIC COMPOUNDS IN THE ATMOSPHERE IN CAMPOS DOS GOYTACAZES AND ITAPERUNA APPLYING MULTIVARIATE DATA ANALYSIS. Volatile Organic Compounds (VOCs) are air pollutants emitted from different sources, mainly by industries and motor vehicles. The evaluation of the emission of these compounds into the atmosphere should be done systematically and with a varied class of compounds. The large number of data generated during the monitoring of these VOCs requires the use of multivariate data tools to interpret the results. In this sense, this work aimed to monitor 10 aromatic VOCs present in the atmosphere of the largest cities in the Norte Fluminense (Campos dos Goytacazes) and Noroeste Fluminense (Itaperuna) regions. The VOCs were actively sampled and analyzed by gas chromatography with mass spectrometry detection after thermal desorption. After treatment of analytical results, it was observed that in both cities there is influence of vehicular emissions. In the city of Itaperuna, due to the relief and lower dispersion of contaminants, there is a higher occurrence of photochemical reactions. The exploratory analysis of the data allowed identifying the variables that were more significant and correlating these variables with the main sources of emission of the compounds. This is the first study of VOCs evaluation in Campos dos Goytacazes and Itaperuna, demonstrating the relevance of this research for understanding the behavior of VOCs in these cities, which have different reliefs and high traffic of cars and trucks in the studied sites.","PeriodicalId":49641,"journal":{"name":"Quimica Nova","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68268281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MICROSCÓPIOS ALTERNATIVOS CONSTRUÍDOS A PARTIR DE MATERIAIS DE BAIXO CUSTO 由低成本材料制成的替代显微镜

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170957

Guilherme Borges, Pedro Borges, C. Cardoso, D. Cerqueira

引用次数: 0

O POTENCIAL DA XANTONA NATURAL α-MANGOSTINA NO DESENVOLVIMENTO DE NOVOS AGENTES ANTI-INFECCIOSOS: UMA REVISÃO 天然α-山竹素山酮在新型抗感染药物开发中的潜力:综述

IF 0.8 4区化学

Quimica Nova Pub Date : 2023-03-03 DOI: 10.21577/0100-4042.20170954

D. Pinto, Gabriela Lobato De Souza, Paulo Pitasse-Santos, A. Velez, Debora Decote-Ricardo, Debora Duarte Dos Santos, Leonardo Freire-de-Lima, Célio Freire-de-Lima, Marco de Lima

{"title":"O POTENCIAL DA XANTONA NATURAL α-MANGOSTINA NO DESENVOLVIMENTO DE NOVOS AGENTES ANTI-INFECCIOSOS: UMA REVISÃO","authors":"D. Pinto, Gabriela Lobato De Souza, Paulo Pitasse-Santos, A. Velez, Debora Decote-Ricardo, Debora Duarte Dos Santos, Leonardo Freire-de-Lima, Célio Freire-de-Lima, Marco de Lima","doi":"10.21577/0100-4042.20170954","DOIUrl":"https://doi.org/10.21577/0100-4042.20170954","url":null,"abstract":"THE POTENTIAL OF NATURAL XANTHONE α-MANGOSTIN IN THE DEVELOPMENT OF NOVEL ANTIINFECTIVE AGENTS: A REVIEW. The mangosteen (Garcinia mangostana, Linn.) is a tropical fruit cultivated in the tropical forests of Southeast Asian countries. It is recognized as the queen of fruits due to its unique color, aroma, and flavor. It has been used for centuries in Southeastern Asian traditional medicine for the treatment of various diseases. Many functional molecules with high medicinal value are obtained from the pericarp of mangosteen fruit, whose major constituent is xanthone α-mangostin. Several studies have been carried out over the last decades to further investigate and understand the pharmacological properties associated with the plant and its main chemical constituents, belonging to the class of xanthones. In addition, numerous in vitro and in vivo studies related to mangosteen have been published, indicating its importance and its potential application in medicinal chemistry. Prenylated xanthones, which include α-mangostin, are secondary metabolites particularly common in plants belonging to the Clusiaceae family. These substances have been intensively investigated for their potential as biologically active agents. This article describes a critical analysis of published data related to the properties of α-mangostin, aiming to provide a more detailed view of its potential as a chemotherapeutic agent for the prevention and treatment of infectious diseases.","PeriodicalId":49641,"journal":{"name":"Quimica Nova","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68268412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0