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Optimization of an Alternative Methodology for Simultaneous Analysis of Nitrite and Nitrate in Water from Urban Stream by Capillary Electrophoresis under Direct UV Detection

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American Journal of Analytical Chemistry 2012年第7期3卷 484-490页

作者： Marcone Augusto Leal de Oliveira denise do carmo soares Gláucia soares Tostes Mara do carmo Guimaraes Fernando Antonio Simas Vaz Departamento de Química Instituto de Ciencias ExatasUniversidade Federal de Juiz de ForaJuiz de ForaBrazil Departamento de Biologia Universidade Federal de Juiz de ForaCidade UniversitáriaJuiz de ForaBrazil

An alternative methodology for simultaneous determination of nitrite and nitrate by capillary zone electrophoresis using direct detection UV at 210 nm under reverse electrosmotic flow is proposed. The choice of the electrolyte composition has taken account: the mobility of the anion buffer and of the solutes;the low absorbance of the buffer in 210 nm;high base line stability and analysis time. The electrolyte optimized has consisted of 100 mmol.L–1 TRIS/HCl buffer and 0.15 mmol.L–1 CTAB at pH 8.2. The proposed method was applied successfully in the analysis of nitrite and nitrate in samples from urban stream in the absence of usual sample pretreatment.

关键词： Capillary Electrophoresis Nitrite Nitrate Urban Stream

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An aqueous extract of Liu Wei Di Huang Wan alters the labeling of blood constituents with Technetium-99m

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Chinese Science Bulletin 2013年第18期58卷 2061-2065页

作者： MATOS Vernica soares de carmo Fernanda Santos do DINIZ Claudia Leite NASCIMENTO Ana Lucia Rosa PEREIRA Márcia Oliveira FERNANDES Joelma Fonseca de Oliveira SANTOS-FILHO Sebastiao David MORENO Silvana Ramos Farias BERNARdo-FILHO Mario Departamento de Biofísica e Biometria Instituto de Biologia Roberto Alcantara GomesUniversidade do Estado do Rio de Janeiro

The Liu Wei Di Huang Wan is a formula of a traditional Chinese medicine that is used to treat asthma patients and has been shown to have several important properties,such as antioxidant and free radical scavenging *** influence of an extract of Liu Wei Di Huang Wan on the labeling of blood constituents with technetium-99m was *** blood(Wistar rats) was incubated with the extract,stannous chloride and technetium-99m,as sodium *** were centrifuged and aliquots of plasma and blood cells were separated and precipitated with trichloroacetic acid,to obtain soluble and insoluble fractions of the blood *** percentage of radioactivity(%ATI) in all the fractions was *** analysis of the results shows that the extract at the highest concentration used(70 mg/mL) decreased significantly(Pdox properties(antioxidant and chelator activities) and/or(ii) specific actions in the binding sites where the 99mTc would be bound on the blood *** a consequence,precaution is suggested on the interpretation of the nuclear medicine results from performed with blood constituents labeled with 99m Tc in patients that have undertaken LWDHW,although the current findings were obtained in experimental animal models.

关键词：六味地黄丸血液成分标签水提物 Wistar大鼠氧化还原性能锝实验动物模型

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Bacterial Fecal Microbiota in Healthy Subjects and Inpatients with <i>Clostridium difficile</i>Infection

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Advances in Microbiology 2017年第1期7卷 10-21页

作者： Thaís Flecher Barbosa Danielle Angst Secco Raquel Silva Peixoto Alexandre soares Rosado Flavia Lima do carmo Hugo Emiliano de Jesus Leandro Araujo Lobo Luis Caetano Martha Antunes Karla Rodrigues Miranda Geraldo Renato de Paula Regina Maria Cavalcanti Pilotto domingues Instituto de Microbiologia Paulo de Goes Universidade Federal do Rio de Janeiro Rio de Janeiro RJ Brazil Escola Nacional de Saúde Pública Sergio Arouca Fundacao Oswaldo Cruz Rio de Janeiro RJ Brazil Faculdade de Farmácia Universidade Federal do Rio de Janeiro—Campus Macaé Macaé RJ Brazil Departamento de Tecnologia Farmacêutica Universidade Federal Fluminense Niterói RJ Brazil

Clostridium difficile is a nosocomial enteric pathogen, considered the main etiological agent of antibiotic-associated diarrhea in hospitals. C. difficile is resistant to several antimicrobial agents used in empiric treatment protocols, which confers selective advantages to this species as compared with other members of the intestinal microbiota. The aim of this study was to evaluate and identify possible alterations of the intestinal microbiota population resulting from the use of antimicrobials associated with infections by C. difficile (CDI). Denaturing Gradient Gel Electrophoresis (DGGE) was used to evaluate fecal samples from two groups: healthy subjects and patients with C. difficile-associated diarrhea (CDAD). A decrease in bacterial diversity was highlighted by the low number of bands in samples from CDAD patients, compared with healthy subjects. This may indicate that antibiotic treatment would affect bacterial diversity, leading to a significant difference between the intestinal microbiota of these two groups, but further studies are still needed. Firmicutes and Verrucomicrobia phyla were detected mainly in healthy individuals, and these could be related to protection factors against the CDI. Klebsiella variicola/K. pneumoniae were found mostly in samples from CDI patients. This study shows the effects of antimicrobials and the CDI itself on human intestinal microbiota.

关键词： Clostridium difficile DGGE Microbiota CDAD Antimicrobials

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