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Pirólise de resíduos do coco-da-baía (Cocos nucifera Linn) e análise do carvão vegetal

Andrade,Azarias Machado de; Passos,Paulo Roberto de Assis; Marques,Luiz Guilherme da Costa; Oliveira,Luciano Basto; Vidaurre,Graziela Baptista; Rocha,José das Dores de Sá
Fonte: Sociedade de Investigações Florestais Publicador: Sociedade de Investigações Florestais
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/10/2004 PT
Relevância na Pesquisa
87%
Este trabalho objetivou realizar a pirólise de resíduos do coco-da-baía (Cocos nucifera Linn) e efetuar a análise química imediata do carvão vegetal produzido. Carvão vegetal, líquido pirolenhoso e gases não-condensáveis foram produzidos sob as temperaturas máximas de destilação de 350, 450 e 550 ºC. Submeteram-se à pirólise o coco inteiro e o seu endocarpo (verde e maduro), adotando como referência o carvão derivado do lenho de eucalipto (Eucalyptus urophylla S. T. Blake). O rendimento gravimétrico do carvão do coco inteiro, pirolisado na temperatura máxima de 350 ºC, foi estatisticamente superior aos dos demais tratamentos. Os maiores rendimentos em gases condensáveis foram obtidos a partir da pirólise do endocarpo verde, sob as três temperaturas máximas de pirólise analisadas. Os maiores teores de carbono fixo foram apresentados pelos carvões derivados do endocarpo do coco maduro, pirolisados nas temperaturas máximas de 450 e 550 ºC. Houve a equiparação estatística dos rendimentos em carbono fixo dos carvões do endocarpo do coco maduro e do lenho de eucalipto, pirolisados sob as três temperaturas máximas ora analisadas, e do coco inteiro destilado a 450 e 550 ºC.

The kernel-fats of some members of the Palmae: Acrocomia sclerocarpa Mart. (Gru-gru palm), Manicaria saccifera Gaertn., Astrocaryum Tucuma Mart., Maximiliana caribaea Griseb., Attalea excelsa Mart. (Pallia palm), and Cocos nucifera Linn. (coconut)

Collin, Geoffrey
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em //1933 EN
Relevância na Pesquisa
36.32%

Antibiofilm activity of coconut (Cocos nucifera Linn.) husk fibre extract

Viju, N.; Satheesh, S.; Vincent, S.G.P.
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.32%
In this study, antibiofilm activity of coconut husk extract (CHE) was tested by various assays in the laboratory. The effects of CHE on extracellular polymeric substance (EPS) production, hydrophobicity and adhesion ability of Pseudomonas sp., Alteromonas sp. and Gallionella sp. and the antimicrobial activity of the extract against these bacteria were assessed. CHE was found to possess antibacterial activity against all the bacterial strains and affected the EPS production. The CHE affected the growth of the biofilm-forming bacteria in a culture medium. The hydrophobicity of the bacterial cells was also changed due to the CHE treatment. The active compound of the CHE was characterised by thin-layer chromatography (TLC), high performance liquid chromatography (HPLC) and fourier transform infrared (FT-IR) analysis. HPLC spectrum showed a single peak and the FT-IR spectrum indicated the presence of an OH-group-containing compound in the extract. In conclusion the CHE could be used as a source for the isolation of antifouling compounds.

Utilização de resíduo lignocelulósico na obtenção de chapa de madeira aglomerada homogênea e compósito reforçado com fibra de vidro-E

Silva, Luiz Claudio Ferreira da
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciência e Engenharia de Materiais; Processamento de Materiais a partir do Pó; Polímeros e Compósitos; Processamento de Materiais a part Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciência e Engenharia de Materiais; Processamento de Materiais a partir do Pó; Polímeros e Compósitos; Processamento de Materiais a part
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
67.31%
This research is about the use of the coconut´s endocarp (nucifera linn) and the waste of derivatives of wood and furniture as raw material to technological use. In that sense, the lignocellulosic waste is used for manufacture of homogeneous wood sheet agglomerate (LHWS) and lignocellulosic load which take part of a polymeric composite with fiber glass E (GFRP-WC). In the manufacturing of the homogeneous wood sheet agglomerate (LHWS), it was used mamona´s resin as waste s agglutinating element. The plates were taken up in a hydraulic press engine, heated, with temperature control, where they were manufactured for different percentage of waste wood and coconuts nucífera linn. Physical tests were conducted to determine the absorption of water, density, damp grade (in two hours and twenty-four hours), swelling thickness (in two hours and twenty-four hours), and mechanical tests to evaluate the parallel tensile strength (internal stick) and bending and the static (steady) flexural. The physical test´s results indicate that the LHWS can be classified as bonded wood plate of high-density and with highly water resistant. In the mechanical tests it was possible to establish that LHWS presents different characteristics when submitted to uniaxial tensile and to the static (steady) flexural...

Avaliação da atividade antimicrobiana, citotóxica e capacidade sequestradora de radicais livres de extratos brutos do Cocos nucifera Linn; Evaluation of antimicrobial and cytotoxicity activity and free radical scavenging capacity of crude extracts of cocos nucifera Linn

Figueira, Cristiane do Nascimento Tavares
Fonte: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Enfermagem; UFAL Publicador: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Enfermagem; UFAL
Tipo: Dissertação
POR
Relevância na Pesquisa
97.63%
Cocos nucifera Linn is a tropical palm tree whose fruit is used for alimentary, cosmetics, handmade and medicinal purposes. However the research from other parts of this species is incipient. The researchs about therapeutic activities from plants used by population is encouraged by the Health World Organisation and, in Brazil, fomented by 10 thousand vegetable species cataloged and only 10% evaluated with respect to their biological activities and safety. The resolution No. 197/1997 of the Federal Council of Nursing endorses the use of plants in the practice of nursing care and linked to the need for alternatives against microbial multirresistance and oxidative diseases which are problems contemporaries of humanity. This preclinical experimental research was performed at the Master’s Program in Nursing at the Federal University of Alagoas in order to investigate the antimicrobial activity and cytotoxicity and free radical scavenging capacity of crude ethanol extracts of the leaves, stem and stalk's husk of Cocos nucifera L. (coconut palm) in vitro. It was evaluated the extract's antimicrobial activities against the Gram positive bacteria: S. aureus and Gram negative: E. coli and P. aeruginosa and C. albicans fungus by Àgar diffusion methods and identification of the Minimum Inhibitory Concentrations by microdilution. It was performed cytotoxicity assay in J774 lineage cells by MTT [3 - (4...