Hplc Dad
Mostrando 25-36 de 219 artigos, teses e dissertações.
-
25. Chemical composition and antimicrobial activity of two extract of propolis against isolates of Staphylococcus spp. and multiresistant bacterials
RESUMO: É cada vez mais oportuna a necessidade de descobrir e desenvolver terapias alternativas para tratamento da mastite causada por Staphylococcus spp. e de infecções bacterianas multirresistentes. Este estudo examinou a composição química e o potencial antimicrobiano de dois extratos etanólicos de própolis (EPA e EPB) contra setenta e sete isolad
Pesq. Vet. Bras.. Publicado em: 04/11/2019
-
26. Toxicity and phytochemistry of eight species used in the traditional medicine of sul-mato-grossense, Brazil
Resumo O Cerrado brasileiro possui diversas espécies botânicas com fins medicinais utilizadas por comunidades tradicionais e muitas dessas plantas não estão incluídas na lista do Programa de Pesquisa de Plantas Medicinais da Central de Medicamentos. O objetivo deste estudo foi a triagem fitoquímica e o bioensaio toxicológico frente ao Brine shrimp L.
Braz. J. Biol.. Publicado em: 21/10/2019
-
27. ANTIMICROBIAL ACTIVITY OF ETHANOLIC EXTRACTS FROM Commiphora leptophloeos (MART.) J. B. GILLETT AGAINST Staphylococcus SPP. ISOLATED FROM CASES OF MASTITIS IN RUMINANTS
Resumo Considerando o potencial terapêutico de plantas medicinais como alternativas à antibioticoterapia, a pesquisa visa avaliar a atividade antimicrobiana de Commiphora leptophloeos contra isolados de Staphylococcus spp. de leite de ruminante com mastite subclínica. Para isso, foi elaborado o extrato etanólico bruto da casca e folhas de Commiphora lept
Ciênc. anim. bras.. Publicado em: 30/09/2019
-
28. Chemical characterization, antioxidant and anti-HIV activities of a Brazilian propolis from Ceará state
ABSTRACT Propolis (bee glue) a product of Apis mellifera L. is a resinous mixture containing chiefly beeswax and resin harvested by bees from plant leaves, buds and exudates. Extracts of a propolis sample from Salitre, a municipality of Ceará state (northeast Brazil) were obtained with solvents of increasing polarity (hexane, chloroform, ethyl acetate and m
Rev. bras. farmacogn.. Publicado em: 26/08/2019
-
29. BINARY CO-CULTURE SELECTION FROM MARINE-DERIVED MICROORGANISMS FOR DIFFERENTIAL PRODUCTION OF SPECIALIZED METABOLITES
Nowadays the discovery of new compounds from microorganisms has substantially decreased. Genomic studies have shown that certain genes are not expressed under standard laboratory conditions. In order to overcome this problem, several methods including microorganism co-culture have been developed. The aim of this work was to select binary co-cultures of marin
Quím. Nova. Publicado em: 26/08/2019
-
30. HPLC profile and simultaneous quantitative analysis of tingenone and pristimerin in four Celastraceae species using HPLC-UV-DAD-MS
ABSTRACT A validated method for the identification and authentication of tingenone and pristimerin was developed using HPLC. The chromatographic profile analysis was combined with simultaneous quantification in Crossopetalum rhacoma Crantz, Cassine xylocarpa Vent, Semialarium mexicanum (Miers) Mennega (known as cancerina), and Maytenus phyllanthoides Benth,
Rev. bras. farmacogn.. Publicado em: 27/05/2019
-
31. Assessment of a Fully Optimized DPX-Based Procedure for the Multiclass Determination of Pesticides in Drinking Water Using High-Performance Liquid Chromatography with Diode Array Detection
In this study, a disposable pipette extraction (DPX)-based procedure was fully optimized for the multiclass determination of 12 pesticides, with significant differences in their physicochemical properties, using high-performance liquid chromatography coupled with diode array detection (HPLC-DAD). The variables optimized were type of extraction phase, sample
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
-
32. Simultaneous Determination of 2,3,7,8-TCDD and 2,3,7,8-TCDF in Water Samples by LLE-LTP and HPLC-DAD
Polychlorinated dibenzo-p-dioxins and dibenzofurans are persistent organic pollutants which can mainly be found in the environment in water. These compounds are highly toxic and therefore developing new extraction methodologies that are simpler and cost less is highly desirable. This study aimed to optimize and validate the liquid-liquid extraction with low-
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
-
33. Composition of polyphenols of asparagus spears (Asparagus officinalis) and their antioxidant potential
RESUMO: O objetivo deste estudo foi examinar o impacto da cor da cultivar e da cor dos turiões na composição de polifenóis em aspargos (Asparagus officinalis). Os cinco genótipos (Schwetzinger Meisterschuss, Huchel’s Alpha, Gijnlim, Grolim e Eposs) e três condições de cultivo de aspargos (Asparagus officinalis) foram investigados. Os polifenóis f
Cienc. Rural. Publicado em: 08/04/2019
-
34. Integrative Analysis Based on HPLC-DAD-MS/MS and NMR of Bertholletia excelsa Bark Biomass Residues:Determination of Ellagic Acid Derivatives
Bertholletia excelsa Bonpl. (Lecythidaceae) is a South American tree worldwide known for providing the Brazil nuts. In the Amazon Region, B. excelsa is found in monocultures, integrating agroforestries and providing raw materials for food and timber industries. Through the application of an integrative analysis based on high-performance liquid chromatography
J. Braz. Chem. Soc.. Publicado em: 2019-04
-
35. Effect of salicylic acid and silver nitrate on rutin production by Hyptis marrubioides cultured in vitro
RESUMO: Hyptis marrubioides (Lamiaceae) é uma planta medicinal nativa do Cerrado brasileiro. Técnicas de propagação in vitro fazem uso de elicitores para alterar as vias metabólicas, afetando a produção de moléculas qualitativa e quantitativamente. Este trabalho teve como objetivo avaliar como os elicitores abióticos ácido salicílico (SA) e nitrat
Cienc. Rural. Publicado em: 18/02/2019
-
36. Simultaneous quantification of six flavonoids in four Scutellaria taxa by HPLC-DAD method
Abstract The objective of this study was to develop and validate a new HPLC method to quantify several flavonoids in the methanol extract prepared from the aerial parts of four Scutellaria L. taxa from flora of Turkey. A simple, sensitive and precise reversed phase HPLC-DAD method was developed and validated for simultaneous determination of six main flavono
Rev. bras. farmacogn.. Publicado em: 2019-02