Ramie
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Estudo das propriedades de concretos com adição de fibras vegetais e de polipropileno para uso em paredes estruturais
RESUMO Estudou-se neste trabalho as propriedades de concretos com adição de fibras vegetais (sisal e rami) e de polipropileno para uso em paredes estruturais. Realizou-se uma comparação do desempenho do concreto com a adição de fibras vegetais e de fibra de polipropileno, a fim de se verificar a possível substituição. Foram avaliadas a retração po
Matéria (Rio J.). Publicado em: 10/06/2019
-
2. Weibull analysis of tensile tested piassava fibers with different diameters
ABSTRACT Environmental considerations in addition to technical, economical and societal benefits are increasingly promoting the substitution of natural fibers for glass fiber in polymer matrix composites. However, natural fibers are heterogeneous in their dimensions, specially the cross section, which plays an important role in their mechanical strength. It
Matéria (Rio J.). Publicado em: 06/12/2018
-
3. Screening a bacterium and its effect on the biological degumming of ramie and kenaf
ABSTRACT: Biological degumming is an eco-friendly, efficient, high-quality and low-cost method that has become the leading bast fiber degumming technology. However, bacterial strains with short degumming cycles, high gum removal rates and small fiber damage are few. To screen high quality microbial resources with bast-fiber biological degumming function, soi
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-09
-
4. Reinforcement of Polyester with Renewable Ramie Fibers
Ramie (Boehmeria nivea) fiber is one of several lignocellulosic fibers with superior strength, but the least investigated, particularly as reinforcement in strong, tough polymeric composites. This paper presents mechanical properties for polyester reinforced with aligned ramie fibers up to 30% by volume. It was found that adding 30 vol% of ramie fibers incre
Mat. Res.. Publicado em: 11/05/2017
-
5. Immobilized Biofilm in Thermophilic Biohydrogen Production using Synthetic versus Biological Materials
Biohydrogen production was studied from the vermicelli processing wastewater using synthetic and biological materials as immobilizing substrate employing a mixed culture in a batch reactor operated at the initial pH 6.0 and thermophilic condition (55 ± 1ºC). Maximum cumulative hydrogen production (1,210 mL H2/L wastewater) was observed at 5% (v/v) addition
Braz. arch. biol. technol.. Publicado em: 2015-02
-
6. Produção e caracterização de compósitos de matriz epóxi reforçada com fibra de rami para fins de reforço estrutural
O advento da tecnologia moderna trouxe consigo um aumento descontrolado nas demandas e no uso das reservas naturais, tornando cada vez mais necessário o desenvolvimento de tecnologias ecológicas, onde se buscam novos materiais, ecologicamente mais corretos. Assim, várias pesquisas e trabalhos estão sendo realizados para garantir a preservação ambiental
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/01/2012
-
7. Preparation and characterization of ramie-glass fiber reinforced polymer matrix hybrid composites
The use of ramie fibers as reinforcement in hybrid composites is justified considering their satisfactory mechanical properties if compared with other natural fibers. This study aims to verify changes in chemical composition and thermal stability of the ramie fibers after washing with distilled water. One additional goal is to study glass fiber and washed ra
Materials Research. Publicado em: 29/05/2012
-
8. Diversity and characterization of ramie-degumming strains
Ramie (Boehmeria nivea and Boehmeria tenacissima) is a widely used fiber crop. Traditional water retting or chemical boiling method performed in order to extract ramie fiber seriously pollute the environment and severely damage the fiber, so biological method is the general trend of the fiber-extracting industry. Some strains (687), involving 26 genera and 4
Scientia Agricola. Publicado em: 2012-04
-
9. Chemical composition and ruminal degradation kinetics of crude protein and amino acids, and intestinal digestibility of amino acids from tropical forages
The objective of this research was to determine the chemical composition and ruminal degradation of the crude protein (CP), total and individual amino acids of leaves from tropical forages: perennial soybean (Neonotonia wightii), cassava (Manihot esculenta), leucaena (Leucaena leucocephala) and ramie (Boehmeria nivea), and to estimate the intestinal digestib
Revista Brasileira de Zootecnia. Publicado em: 2012-03
-
10. The dynamic-mechanical behavior of epoxy matrix composites reinforced with ramie fibers
The exceptional tensile strength of ramie fiber has motivated investigations on its application as reinforcement in polymeric composites. In this study the temperature variation of the dynamic-mechanical parameters of epoxy matrix composites incorporated with up to 30% in volume of ramie fiber were investigated by DMA tests. The parameters were the storage m
Matéria (Rio de Janeiro). Publicado em: 2010
-
11. Selection of high strength natural fibers
By means of dimensional selection of natural lignocellulosic fibers, based on precise diameter measurements, it was recently possible to obtain fibers with relatively higher tensile strength. The present article overviews works on the statistical evaluation, through the Weibull analysis, of the ultimate tensile stress of eight lignocellulosic fibers: sisal,
Matéria (Rio de Janeiro). Publicado em: 2010
-
12. Cultura do rami no agreste nordestino.
Caracteristicas da fibra do rami; Condicoes ideais para exploracao do rami; Preparo do solo e plantio; Adubacao; Processo de multiplicacao; Cultivares; Tratos culturais e colheita; Pragas e doencas; Producao, custo e comercializacao; Beneficiamento industrial; Rami na alimentacao animal.
Campina Grande: EMBRAPA-CNPA. Publicado em: 1996