Natural Rubber
Mostrando 1-12 de 106 artigos, teses e dissertações.
-
1. Protein Removal from Natural Rubber Latex with Fe3O4@Al2O3 Nanoparticle
The presence of protein in the natural rubber latex for the medical device manufacture seems to be the most considered compound due to its allergic effect. Magnetic coated alumina (Fe3O4@Al2O3) has been known as an adsorbent for organic substrates due to its performance through physical and/or chemical interaction. In the current study, we tried to figure ou
J. Braz. Chem. Soc.. Publicado em: 2021-02
-
2. Materials from renewable resources: new properties and functions
Abstract: Sustainable production requires increasing use of raw materials from renewable sources, processed under mild conditions with minimal effluent production. These requirements are satisfied by using materials derived from biomass, in synergy with food and energy production. The possibilities of biomass are continuously enlarged by new findings, as in
An. Acad. Bras. Ciênc.. Publicado em: 21/10/2019
-
3. Sustainable blends of LDPE/NR and sugarcane bagasse ashes with PE-g-MA thermomechanical relationships
RESUMO As blendas poliméricas obtidas com resíduos que antes eram chamados de lixos vêm crescendo como uma solução viável, permitindo melhorias nas propriedades mecânicas e como alternativas sustentáveis. Este trabalho relata os efeitos de misturas de polietileno de baixa densidade (PEBD) e borracha natural(NR), com cinzas de bagaço de cana-de-açú
Matéria (Rio J.). Publicado em: 16/09/2019
-
4. Cellulose Nanocrystals and Jute Fiber-reinforced Natural Rubber Composites: Cure Characteristics and Mechanical Properties
A comparative study was conducted for three natural rubber (NR) composites: one containing raw jute fibers, one containing bleached jute fibers, and one containing cellulose nanocrystals (CNCs). The composites were prepared by adding each filler at 5 or 10 phr to the latex before chemical coagulation, and the composites were processed in a two-roll mixing mi
Mat. Res.. Publicado em: 26/08/2019
-
5. A aplicação exógena foliar de ácido abscísico desencadeia mecanismos de tolerância à deficiência hídrica em seringueira
Resumo O ácido abscísico (ABA) é conhecido como o hormônio mais influente em desencadear mecanismos de tolerância a estresse em plantas, inclusive à deficiência hídrica. No entanto, o efeito da aplicação exógena como indutora de tolerância pré-estresse é pouco estudado em plantas de interesse agronômico. O objetivo deste trabalho foi avaliar o
Ciênc. Florest.. Publicado em: 30/05/2019
-
6. Synthesis and characterization of isoprene oligomers to compare different production chemical processes
Abstract Three methods to obtain isoprene oligomers were evaluated: chemical degradation of non-vulcanized coagulated natural rubber; chemical degradation of natural rubber latex; and oligomerization of the isoprene monomer. The products were characterized by infrared spectrometry (FTIR), nuclear magnetic resonance (NMR) and size-exclusion chromatography (S
Polímeros. Publicado em: 18/03/2019
-
7. COMPETITIVENESS AND EFFICIENCY FOR THE RUBBER TREE PRODUCTION SYSTEM IN SOUTHERN BAHIA (BRAZIL) THROUGH BY THE POLICY ANALYSIS MATRIX (PAM)
RESUMO A presente pesquisa teve como objetivo analisar a competitividade e a eficiência econômica do sistema de produção da seringueira, no Sul do estado da Bahia, pela Matriz de Análise de Políticas (MAP). A análise foi dividida em quatro categorias: análise de lucratividade; análise de eficiência; análise de proteção e transferência líquida
Rev. Árvore. Publicado em: 11/02/2019
-
8. Composition Determination of Rubber Blends by Applying Differential Scanning Calorimetry and SPA-PLS Treatment
This paper proposes an innovative approach to determine the composition of natural rubber (NR) and styrene butadiene rubber (SBR) blends from the analysis of the data provided by the differential scanning calorimetry (DSC) technique. DSC registers are post-processed, based on a multivariate chemometric approach, consisting in the application of the successiv
Mat. Res.. Publicado em: 07/01/2019
-
9. Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil.
ABSTRACT This study evaluates the potential of rubber tree clones (Hevea spp.) under four tapping systems for the Northwestern region of the State of Paraná with the objective of enhance genetic diversification and increase natural rubber production in this new and promising region for rubber tree cultivation by selecting the better combination of clone and
Braz. arch. biol. technol.. Publicado em: 14/11/2018
-
10. Rubber gloves biodegradation by a consortium, mixed culture and pure culture isolated from soil samples
Abstract An increasing production of natural rubber (NR) products has led to major challenges in waste management. In this study, the degradation of rubber latex gloves in a mineral salt medium (MSM) using a bacterial consortium, a mixed culture of the selected bacteria and a pure culture were studied. The highest 18% weight loss of the rubber gloves were de
Braz. J. Microbiol.. Publicado em: 2018-09
-
11. Characterization of additives in NR formulations by TLC-IR (UATR)
Abstract It is a well-established fact that rubber accelerator is essential to provide solution in different sectors. However, there is a reversal process which can reduce the material performance. Sulfur accelerators donors and organic peroxides have been presented as a solution to the problem. The methodology development that can separate or characterize
Polímeros. Publicado em: 10/07/2018
-
12. A new technique in the excavation of ground-nest bee burrows (Hymenoptera: Apoidea)
ABSTRACT Bees have a diversified natural history, thus the methods applied to study such diversity are varied. When it comes to studies of nesting biology, bees which nest in pre-existing cavities have been reasonably well studied since researchers started using trap-nests. However, bees whose nests are built underground are poorly studied due to the difficu
Rev. Bras. entomol.. Publicado em: 2018-01