Time Varying Exposure
Mostrando 1-12 de 45 artigos, teses e dissertações.
-
1. Evaluation of pulmonary maturity in bovine neonates: analysis of amniotic fluid
RESUMO: O objetivo desse estudo foi reunir novos dados práticos sobre a avaliação da maturidade pulmonar em neonatos bovinos, padronizando as características do líquido amniótico de bezerros maduros e hígidos, o que proporcionará a oportunidade de tratamento precoce dos animais prematuros, evitando prejuízos econômicos, principalmente quando consid
Pesq. Vet. Bras.. Publicado em: 14/10/2019
-
2. PVC MEMBRANES PREPARED VIA NON-SOLVENT INDUCED PHASE SEPARATION PROCESS
ABSTRACT Polyvinylchloride (PVC) based membranes are prepared via a phase inversion method using N,N-dimethylacetamide (DMAc) as solvent and water as precipitation bath. Polyvinylpyrrolidone (PVP) and lithium nitrate (LiNO3) are used as additives. Experimental cloud point data and solution viscosity measurements are evaluated. Precipitation rates, transport
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
-
3. Stability and phosphorus leaching of tilapia feed in water
RESUMO: O presente trabalho tem como objetivo investigar a estabilidade de pellets e a lixiviação do fósforo na água proveniente de diferentes dietas formuladas para juvenis de tilápia do Nilo (Oreochromis niloticus), considerando distintas fontes de fósforo e diferentes tempos de exposição na água. Para tanto, foram elaboradas seis dietas com vari
Cienc. Rural. Publicado em: 23/05/2019
-
4. Effect of herbicides in the oxidative stress in crop winter species
ABSTRACT Most herbicides applied in crop field, stay in the soil for a period, affecting next crop or even the plants using as green manure. Nowadays, the use of herbicides grow to increase productivity, mainly in the grain producing region north of Rio Grande do Sul state. The objective of this study was to evaluate the effects of herbicides fomesafen and s
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
-
5. Azeite de pequi: efeito do aquecimento em temperatura de fritura e utilização como ingrediente na formulação de maionese / Pequil oil: effect of heating to temperature of frying and use as ingredients in the formulation of mayonnaise
Pequi is a fruit typical of the brasilian savanna and among the nutrients found in the internal mesocarp, the lipids are present in higher percentage. Due to the presence of carotenoid pigments, notorius as antioxidants, pequi oil has red-orange color. Among these carotenoids found beta-carotene, that has also pro-vitamin A activity. The mayonnaise, emulsion
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2011
-
6. Radiopacity evaluation of Portland and MTA-based cements by digital radiographic system
OBJECTIVE: The aim of the present study was to evaluate the radiopacity of Portland and MTA-based cements using the Digora TM digital radiographic system. MATERIAL AND METHODS: The performed tests followed specification number 57 from the American National Standard Institute/American Dental Association (2000) for endodontic sealing materials. The materials w
Journal of Applied Oral Science. Publicado em: 2011-06
-
7. IMPACTO DO RUÍDO OCUPACIONAL NA AUDIÇÃO E QUALIDADE DE VIDA DE TRABALHADORES INSERIDOS EM UM PROGRAMA DE CONSERVAÇÃO AUDITIVA. / IMPACT OF OCCUPATIONAL NOISE ON HEARING AND QUALITY OF LIFE OF WORKERS POSTED IN A HEARING CONSERVATION PROGRAM.
Noise is the most common harmful physical agent found in the workplace. This hazardous agent gains more importance when it is proved that the hearing damage caused by it is irreversible, and that the continuous exposure produces other organic, physiological and psycho-emotional disturbances that result in lower life quality and health of workers. This work e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2010
-
8. Surface degradation of glass ceramics after exposure to acidulated phosphate fluoride
OBJECTIVE: This study evaluated the surface degradation effect of acidulated phosphate fluoride (APF) gel exposure on the glassy matrix ceramics as a function of time. MATERIAL AND METHODS: Disc-shaped ceramic specimens (N = 120, 10/per ceramic material) were prepared in stainless steel molds (inner diameter: 5 mm, height: 2 mm) using 6 dental ceramics: 3 in
Journal of Applied Oral Science. Publicado em: 2010-04
-
9. Desidratação osmotica e secagem convectiva de maçã : transferencia de massa e alterações de estrutura celular / Osmotic dehydrations and convective drying apple; : mass transfer and cellular structure changes
In this study it was investigated the osmotic dehydration of apples (Fuji variety) followed or not by convective drying with hot air. Concentration profiles were determined for water and solute(s) in samples of apples cut in half and osmotically dehydrated in binary aqueous solutions (30% and 50% sucrose, w/w) and ternary solution (50% sucrose and 10% sodium
Publicado em: 2009
-
10. Use of raw material obtained from a renewable source in tbhe preparation of phenolic type matrix composites / Utilização de matéria-prima obtida de fonte renovável na preparação de compósitos de matriz tipo fenólica
In the present work phenolic type matrices were prepered, which were reinforced with lignocellullosic fibers (sisal). The tannin-phenolic and phenol-furfural resins, amid other techniques, were characterized by nuclear magnetic resonance (NMR). Model compounds were synthesized specially for the 1H and 13C NMR analysis of phenol-furfural resins. The sisal fib
Publicado em: 2008
-
11. Brazilian Hedge Funds Dynamics: econometric Modelling with Time-Varying Parameters / Dinâmica dos Hedge Funds Brasileiros: aplicação de Modelo Econométrico com Parâmetros Variando no Tempo
O objetivo deste trabalho é analisar a modelagem dos retornos dos hedge funds brasileiros, utilizando modelos de regressão com parâmetros invariantes no tempo, de regressão com auto-regressivo defasagens distribuída e com parâmetros variando no tempo. A análise foi realizada com oito hedge funds no período compreendido entre janeiro de 2005 a abril d
Publicado em: 2007
-
12. Filmes finos de iodeto de chumbo como detector de raios-X para imagens médicas / Lead Iodide Thin Films as X-ray detectors for Medical Imaging
In the last few years, great interest has been focused to high atomic number and wide band gap semiconductor materials for applications in room temperature ionizing radiation detection using the direct detection method. Some materials such as PbI2, HgI2, TlBr, CdTe and CdZnTe are good photoconductors and can be used at room temperature. As a good candidate,
Publicado em: 2007