Results: 3070

Phenolic content and antibacterial activity of extracts of Hamelia patens obtained by different extraction methods

Braz. j. microbiol; 49 (3), 2018
Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and...

Cloning and expression of an endoglucanase gene from the thermotolerant fungus Aspergillus fumigatus DBiNU-1 in Kluyveromyces lactis

Braz. j. microbiol; 49 (3), 2018
Abstract An intronless endoglucanase from thermotolerant Aspergillus fumigatus DBINU-1 was cloned, characterized and expressed in the yeast Kluyveromyces lactis. The full-length open reading frame of the endoglucanase gene from A. fumigatus DBiNU-1, designated Cel7, was 1383 nucleotides in length and enc...

Optimization of liquid fermentation conditions for biotransformation zein by Cordyceps militaris 202 and characterization of physicochemical and functional properties of fermentative hydrolysates

Braz. j. microbiol; 49 (3), 2018
Abstract Cordyceps militaris 202 is a potential fungus for biotransformation zein, due to its various proteases, high tolerance and viability in nature. In this article, single factor experiment and response surface methodology were applied to optimize the liquid fermentation conditions and improve the a...

Use of modified Richards model to predict isothermal and non-isothermal microbial growth

Braz. j. microbiol; 49 (3), 2018
Abstract Mathematical models are often used to predict microbial growth in food products. An important class of these models involves the adaptation of classical sigmoid functions, such as the Gompertz and logistic functions. This study aimed to validate the use of the modified Richards model in various ...

Conteúdo de gordura e energia no colostro: efeito da idade gestacional e do crescimento fetal

RESUMO Objetivo: Avaliar se o conteúdo de gordura e o valor energético estimado no colostro diferem em função da idade gestacional e do crescimento fetal. Métodos: Estudo transversal com mães de recém-nascidos pré-termo e a termo nascidos em centro terciário em 2015-2016. Critério de inclus...

Erosive potential of sports beverages on human enamel "in vitro"

Rev. bras. med. esporte; 24 (5), 2018
INTRODUCTION: The low pH of sports drinks may cause tooth enamel demineralization. Objective: To measure Vickers hardness of human enamel exposed to sports drinks. METHODS: Human molars were used to collect the enamel samples. Each sample had a test surface (exposed to the drinks) and a control surface (...

Analysis of Bm86 conserved epitopes: is a global vaccine against Cattle Tick Rhipicephalus microplus possible?

Abstract The cattle tick Rhipicephalus microplus causes significant economic losses in agribusiness. Control of this tick is achieved mainly through the application of chemical acaricides, often resulting in contamination of animal food products and of the environment. Another major concern associated w...

Atividade antimicrobiana de Stevia rebaudiana Bertoni e de adoçantes não calóricos sobre bactérias cariogênicas: estudo in vitro

RFO UPF; 23 (1), 2018
Objetivo: avaliar a atividade antimicrobiana in vitro da planta Stevia rebaudiana Bertoni e de adoçantes não calóricos sobre o crescimento de Streptococcus mutanse Lactobacillus casei, micro-organismos cariogênicos presentes na cavidade bucal. Materiais e método: o estudo foi realizado utilizando as...

Tratamentos superficiais de sistemas cerâmicos para união a cimentos resinosos

RFO UPF; 23 (1), 2018
Objetivo: apresentar uma revisão de literatura sobreos tipos de tratamentos de superfície disponíveis paracimentação adesiva a sistemas cerâmicos. Revisãode literatura: ainda que haja certo consenso na uniãoadesiva às vitrocerâmicas, ainda não há uma unanimidadequanto à adesão de cerâmicas...

Características mecânicas e ópticas de resinas bulk-fill: revisão de literatura

RFO UPF; 23 (1), 2018
Objetivo: realizar uma análise descritiva das característicasmecânicas e ópticas das resinas bulk-fill com baseem dados da literatura. Revisão da literatura: para arealização do estudo, foram utilizados artigos extraídosdas bases de dados PubMed, SciELO e Lilacs. As palavras-chave utilizadas para...