Results: 135

Carga contaminante de los residuos sólidos municipales en la cabecera departamental de Jalapa, Guatemala

Cienc. tecnol. salud; 4 (1), 2017
Se expone la carga contaminante de los residuos sólidos municipales, en la cabecera departamental de Jalapa, Guatemala. Cada residuo, sin importar su origen o forma, tiene una composición química específica, la cual indicará su grado de contaminación o carga contaminante. El estudio se enfocó en e...

Atividade antibacteriana de tubos endotraqueais revestidos com dióxido de titânio padrão e dopados com nitrogênio: um estudo in vitro

RESUMO Objetivo: Avaliar a atividade antibacteriana contra Staphylococcus aureus e Pseudomonas aeruginosa de dois revestimentos endotraqueais com nanopartículas e fotocatálise sob luz visível. Métodos: Testaram-se dois tipos de nanopartículas de titânio: anatase padrão (TiO2) e TiO2 nano-dopada ...

Zeólitas naturais na dieta de frangos de corte

O objetivo deste trabalho foi avaliar o efeito da inclusão de 0,5% da zeólita natural clinoptilolita na dieta de frangos de corte sobre o consumo de água, ração e características das excretas. Foi conduzido um ensaio em gaiolas metabólicas, com frangos de corte de linhagem comercial, no período d...

Processos de produção da proteína heteróloga mCherry por Chlamydomonas reinhardtii

Este trabalho tem como finalidade estudar as melhores condições do cultivo da microalga Chlamydomonas reindhartii geneticamente modificada para a produção da proteína fluorescente mCherry a partir do estudo dos macronutrientes contidos no meio de cultivo. A proteína mCherry possui a vantagem de ser...

Relationship between ventilation heterogeneity and exercise intolerance in adults with sickle cell anemia

Braz. j. med. biol. res; 50 (8), 2017
Sickle cell anemia (SCA) causes dysfunction of multiple organs, with pulmonary involvement as a major cause of mortality. Recently, there has been growing interest in the nitrogen single-breath washout (N2SBW) test, which is able to detect ventilation heterogeneity and small airway disease when the resul...

Effects of nutritional conditions on lipid production by cyanobacteria

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT The present study evaluated the effects of the culturing media and the levels of nitrogen and phosphorus on the growth, biomass productivity and lipid production of four species of Microcystis (M. novacekii, M. aeruginosa, M panniformis and M. protocystis). The lipid extract was obtained by refl...

Thermostable chitinase from Cohnella sp. A01: isolation and product optimization

Braz. j. microbiol; 47 (4), 2016
Abstract Twelve bacterial strains isolated from shrimp farming ponds were screened for their growth activity on chitin as the sole carbon source. The highly chitinolytic bacterial strain was detected by qualitative cup plate assay and tentatively identified to be Cohnella sp. A01 based on 16S rDNA sequen...

Antimicrobial profile of Arthrobacter kerguelensis VL-RK_09 isolated from Mango orchards

Braz. j. microbiol; 47 (4), 2016
Abstract An actinobacterial strain VL-RK_09 having potential antimicrobial activities was isolated from a mango orchard in Krishna District, Andhra Pradesh (India) and was identified as Arthrobacter kerguelensis. The strain A. kerguelensis VL-RK_09 exhibited a broad spectrum of in vitro antimicrobial act...

Response of phytoplankton to an experimental fish culture in net cages in a subtropical reservoir

Braz. j. biol; 76 (4), 2016
Abstract This study aimed to evaluate nutrients concentration and spatial-temporal changes in phytoplankton biovolume during an experimental fish culture in net cages in a lateral arm of Salto Caxias reservoir, Brazil. Two sampling stations were placed in the affected lateral arm and other two in a cagel...

Environmental indicators in effluent assessment of rainbow trout (Oncorhynchus mykiss) reared in raceway system through phosphorus and nitrogen

Braz. j. biol; 76 (4), 2016
Abstract The phosphorus and nitrogen discharge via effluent of intensive trout farming system was quantified through the use of environmental indicators. The nutrient loads, the mass balance, the estimated amount of nutrients in feed and the amount of nutrients converted in fish biomass were calculated b...