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Registros recuperados: 21
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Agronomical performance and profitability of exploitation systems in four rubber tree clones in São Paulo state Bragantia
Silva,Juliano Quarteroli; Gonçalves,Paulo de Souza; Scarpare Filho,João Alexio; Costa,Reginaldo Brito da.
The exploitation or tapping of the rubber tree, Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. Arg. is one of the most important cultural practices in determining useful life, yield and accounts for a major part of the total production costs in rubber farming. The objective of this work was to evaluate yield performance and economic aspects of rubber tree clones submitted to diverse tapping systems. The trial was placed in Guararapes city, São Paulo State, Brazil, in a randomized block design with split-plot in time. The plots consisted of the IAN 873, PR 261, RRI M 600 and RRI M 701 clones. The tapping systems consisted the subplots, where: ½S = tapping of half spiral cut; d/2, d/3, d/4, d/5 and d/7 = tapping every 2, 3, 4, 5 and 7 days,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea brasiliensis; Natural rubber; Tapping; Ethephon; Tapping panel dryness.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000400009
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Biodegradation of a blended starch/natural rubber foam biopolymer and rubber gloves by Streptomyces coelicolor CH13 Electron. J. Biotechnol.
Watcharakul,Sirimaporn; Umsakul,Kamontam; Hodgson,Brian; Chumeka,Wannapa; Tanrattanakul,Varaporn.
Background: The growing problem of environmental pollution caused by synthetic plastics has led to the search for alternative materials such as biodegradable plastics. Of the biopolymers presently under development, starch/natural rubber is one promising alternative. Several species of bacteria and fungi are capable of degrading natural rubber and many can degrade starch. Results: Streptomyces coelicolor CH13 was isolated from soil according to its ability to produce translucent halos on a mineral salts medium, MSM, supplemented with natural rubber and to degrade starch. Scanning electron microscope studies showed that it colonized the surfaces of strips of a new starch/natural rubber biopolymer and rubber gloves and caused degradation by forming holes,...
Tipo: Journal article Palavras-chave: Biodegradation; Biopolymer; Natural rubber; Starch; Streptomyces coelicolor.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000100008
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Borracha natural e borracha sintética. Repositório Alice
BEKKEDAHL, N..
bitstream/item/191421/1/Borracha-natural.pdf
Tipo: Outras publicações científicas (ALICE) Palavras-chave: Borracha natural; Borracha sintetica; Natural rubber; Synthetic rubber.
Ano: 1944 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/374238
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Borrachas naturais brasileiras II. Borrachas fracas; borrachas de H. benthamiana e H. guianensis. Infoteca-e
WISNIEWSKI, A.; MELO, C. F. M. de..
1981
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Borracha natural; Tecnologia; Análise socio-economica; Borracha fraca; Análise estatística; Propriedade; Hevea benthamiana; Hevea guianensis; Hevea brasiliensis; Belém; Manaus; Pará; Amazonas; Brasil; Natural rubber; Technology; Socioeconomic analysis; Weak rubber; Statistical analysis; Property.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/379779
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Borrachas naturais brasileiras III. Borracha de mangabeira. Infoteca-e
WISNIEWSKI, A.; MELO, C. F. M. de..
1982
Tipo: Documentos (INFOTECA-E) Palavras-chave: Mangabeira; Tecnologia; Produção; Exportação; Coagulação; Borracha natural; Análise; Produtividade; Extração do latex; Hancornia speciosa; Brasil; Technology; Production; Exportation; Coagulation; Natural rubber; Analysis; Yield; Latex extraction.
Ano: 1982 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/388000
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Borrachas naturais brasileiras. IV. Borracha de manicoba. Infoteca-e
WISNIEWSKI, A.; MELO, C. F. M. de..
1983
Tipo: Documentos (INFOTECA-E) Palavras-chave: Borracha natural; Manicoba; Caracteristica; Tecnologia; Planta lactifera; Latex; Analise; Elastomero; Manihot; Brasil; Natural rubber; Characteristic; Technology; Lactiferous plant; Analysis; Elastomer.
Ano: 1983 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/388001
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Borrachas naturais brasileiras. V. Borracha de murupita. Infoteca-e
WISNIEWSKI, A.; MELO, C.F.M. de..
1984
Tipo: Documentos (INFOTECA-E) Palavras-chave: Borracha natural; Murupita; Elastomero; Planta laticifera; Producao economica; Latex; Caracteristica quimica; Caracteristica fisica; Caracteristica fisico-quimica; Composicao quimica; Propriedade fisico-mecanica; Sapium aubletianum; Brasil; Natural rubber; Elastomer; Lacticiferous plant; Economic production; Chemical characteristic; Phisical characteristic; Phisicochemical characteristic; Chemical composition; Phisicomechanical propriety.
Ano: 1984 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/382258
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Borrachas naturais brasileiras. VI. Borrachas do gênero Hevea. Infoteca-e
WISNIEWSKI, A.; MELO, C.F.M. de.
1986
Tipo: Documentos (INFOTECA-E) Palavras-chave: Borracha natural; Elastomero; Planta laticifera; Belem; Pará; Amazonia; Brasil; Natural rubber; Elastomer; Laticiferous plant.
Ano: 1986 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/381189
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Borrachas naturais brasileiras. VII. Borracha de micrandra. Infoteca-e
WISNIEWSKI, A.; MELO, C.F.M. de..
1987
Tipo: Documentos (INFOTECA-E) Palavras-chave: Borracha natural; Micrandra; Elastomero; Planta laticifera; Latex; Vale do Orinoco; Rio Amazonas; Amazonia; Brasil; Natural rubber; Elastomer; Lacticiferous plant.
Ano: 1987 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/381191
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Caracterização mecânica e térmica da borracha natural formulada e vulcanizada dos clones: GT 1, IAN 873, PB 235 e RRIM 600. Repositório Alice
DALL'ANTONIA, A. C.; MARTINS, M. A.; MORENO, R. M. B.; MATTOSO, L. H. C.; GONÇALVES, P. S.; JOB, A. E..
bitstream/item/194635/1/Caracterizacao-mecanica-e-termica-da-borracha-natural-formulada-e-vulcanizada-dos-clones-GT-1-IAN-873-PB-235-e-RRIM-600.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Borracha natural; Caracterização; Compostos; Natural rubber; Compound; Clones.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/48867
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Effects of the Public Policies on the Natural Rubber Production in Sao Paulo and Mato Grosso States AgEcon
Rosado, Patricia Lopes; Tosto, Sergio Gomes; Gomes, Marilia Fernandes Maciel; do Carmo, Ciriaca A.F. Santana.
The objective of this study was to evaluate the effects of the government intervention on the expansion of the natural rubber production in Sao Paulo and Mato Grosso states. The method used was the policy analysis matrix, developed by MONKE and PEARSON (1989). The results showed that the production of natural rubber in those states has conditions to face the liberalization changes that have been taking place in the international market. The government's role in that process is relevant in order to promote the development of that activity and to reduce the distortions, since these impede that the market signals guide the producer decisions in an integrated economy into the world market. Some policy measures can be carried out to improve the competitiveness...
Tipo: Conference Paper or Presentation Palavras-chave: Competitiveness; Liberalization of markets; Natural rubber; Public policies; Agricultural and Food Policy.
Ano: 2005 URL: http://purl.umn.edu/24273
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Evaluation of Rubber Tree Clones Under Different Tapping Systems in Northwestern Paraná State, Brazil. BABT
Pereira,Jomar da Paes; Leal,Alex Carneiro; Ramos,Andre Luiz Medeiros.
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 tapping system. The experiment was installed at Guanabara Farm, municipality of Paranapoema, Paraná State, in a split-plot randomized complete blocks experimental design with three replications. In the plots 12 clones were tested, namely RRIM 600 (control), IRCA 18, IRCA 111, IRCA 130, PB 235, PB 252, PB 260, PB 330, IAC 15, IAC 35, IAC 41 and RO 38. The subplot treatments consisted of four tapping...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hevea brasiliensis; Natural rubber; Yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100202
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Fatigue resistance of natural rubber in seawater with comparison to air ArchiMer
Ulu, K. Narynbek; Huneau, B.; Le Gac, Pierre-yves; Verron, E..
Fatigue properties of filled natural rubber in seawater environment are investigated by uniaxial fatigue and crack propagation experiments, and the damage is analyzed by scanning electron microscopy. The behavior under relaxing and non-relaxing loading conditions is studied and the results are compared to those obtained in air environment. For relaxing loading conditions, fatigue behavior is the same in both environments. Under non-relaxing conditions at large strain levels, for which the influence of strain-induced crystallization is important, fatigue life is longer in seawater. Such behavior could be explained by increased internal temperatures of specimens tested in air due to lower heat conductivity of air as compared to seawater. Such conclusion is...
Tipo: Text Palavras-chave: Natural rubber; Fatigue; Environmental effects; Seawater; Strain-induced crystallization.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00324/43523/43055.pdf
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Genetic diversity strategy for the management and use of rubber genetic resources: more than 1,000 wild and cultivated accessions in a 100-Genotype core collection. Repositório Alice
SOUZA, L. M. de; LE GUEN, V.; CERQUEIRA-SILVA, C. B. M.; SILVA, C. C.; MANTELLO, C. C.; CONSON, A. R. O.; VIANNA, J. P. G.; ZUCCHI, M. I.; SCALOPPI JUNIOR, E. J.; FIALHO, J. de F.; MORAES, M. L. T. de; GONÇALVES, P. de S.; SOUZA, A. P. de.
Abstract - The rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. Arg.] is the only plant species worldwide that is cultivated for the commercial production of natural rubber. This study describes the genetic diversity of the Hevea spp. complex that is available in the main ex situ collections of South America, including Amazonian populations that have never been previously described. Genetic data were analyzed to determine the genetic structure of the wild populations, quantify the allelic diversity and suggest the composition of a core collection to capture the maximum genetic diversity within a minimal sample size. A total of 1,117 accessions were genotyped with 13 microsatellite markers. We identified a total of 408 alleles, 319 of which...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Hevea brasiliensis; Natural rubber; Estrutura genética; Genetic structure.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1035994
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Impact of Mahatma Gandhi National Rural Employment Guarantee Act on Rubber Block Plantation Scheme in Tripura AgEcon
Sharma, Gaurav; Joseph, Joby; Tharian, George K.; Dey, S.K..
Among the various promotional schemes targeted for the promotion of rubber in Tripura, Block Plantation Scheme (BPS) has been introduced exclusively for the rehabilitation of scheduled tribes and scheduled castes. BPS is a comprehensive scheme with the characteristic features of group/community approach in all spheres of operations up to primary processing and marketing and family labour participation as wage labour during the immature phase of the plantations spanning six years. However, there has been a distortion in the uninterrupted supply of family labour to the scheme in the recent past due to growing popularity of employment opportunities under the Mahatma Gandhi National Rural Employment Guarantee Act, 2005 (MGNREGA) programme, which may eventually...
Tipo: Article Palavras-chave: Natural rubber; Block Plantation Scheme; Tripura; Rehabilitation; Labour; MGNREGA; Agricultural and Food Policy; J15; J21; J43; J31.
Ano: 2011 URL: http://purl.umn.edu/119406
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Materials from renewable resources: new properties and functions Anais da ABC (AABC)
GALEMBECK,FERNANDO; BURGO,THIAGO A.L.; SILVA,DOUGLAS S. DA; SANTOS,LEANDRA P..
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 the intrinsic nanocomposite properties of natural rubber and the amphiphile behavior of cellulose that translated into new functional materials, including high-performance, flexible and conductive non-metallic materials. Other findings are allowing a better understanding of electrostatic phenomena that play a positive role in electrostatic adhesion and cohesion of nanocomposites made from biomass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulose; Electrostatics; Nanocomposites; Natural rubber.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700401
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Rubber gloves biodegradation by a consortium, mixed culture and pure culture isolated from soil samples BJM
Nawong,Chairat; Umsakul,Kamontam; Sermwittayawong,Natthawan.
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 detected after incubated with the mixed culture. The increased viable cell counts over incubation time indicated that cells used rubber gloves as sole carbon source leading to the degradation of the polymer. The growth behavior of NR-degrading bacteria on the latex gloves surface was investigated using the scanning electron microscope (SEM). The occurrence of the aldehyde groups in the degradation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Degradation; Natural rubber; Rubber glove; Rhodococcus.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300481
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Sistemas de explotação de seringueira utilizados em clones asiáticos Prang Besar no Oeste paulista Repositório Alice
SILVA, J.Q.; SOUZA, M.I.T. de; GONÇALVES, P. de S.; PINOTTI, R.N..
O objetivo deste trabalho foi avaliar o desempenho produtivo e os aspectos fisiológicos e econômicos de quatro clones asiáticos Prang Besar de seringueira [Hevea brasiliensis (Willd. ex A. Juss.) Muell. Arg.], sob diferentes sistemas de sangria. O experimento foi instalado na Fazenda Santa Gilda, Município de Guararapes, SP, em delineamento de blocos ao acaso, com parcelas subdivididas no tempo. Os tratamentos principais foram os clones PB 260, PB 235, PB 330 e PB 217, submetidos a nove sistemas de sangria: ½S d/3.ET 2,5% 8/y; ½S d/3.ET 5% 8/y; ½S d/4.ET 2,5% 8/y; ½S d/4.ET 5% 8/y; ½S d/5.ET 2,5% 8/y; ½S d/5.ET 5% 8/y; ½S d/7.ET 2,5% 8/y; ½S d/7.ET 5% 8/y e ½S d/2 (testemunha). As variáveis avaliadas foram: perímetro do caule, produção de borracha seca,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Hevea brasiliensis; Borracha natural; Estimulação química; Secamento do painel; Economia; Natural rubber; Chemical stimulation; Brown bast; Economy.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122766
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Studies on thermal-oxidative degradation behaviours of raw natural rubber: PRI and thermogravimetry analysis. Repositório Alice
GALIANI, P. D.; MALMONGE, J. A.; SOARES, B. G.; MATTOSO, L. H. C..
bitstream/item/188570/1/Studies-on-thermaloxidative-degradation-behaviours-of-raw-natural-rubber.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Natural rubber; Thermogravimetry analysis; Borracha natural; Análise termogravimétrica; Degradação; Degradation.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/968107
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Viabilidade econômica de diferentes sistemas de sangria em clones de seringueira. Repositório Alice
SILVA, J.Q.; SOUZA, M.I.T. de; GONÇALVES, P. de S.; AGUIAR, A.T. da E.; GOUVÊA, L.R.L.; PINOTTI, R.N..
O objetivo deste trabalho foi avaliar o desempenho produtivo e os aspectos econômicos de três clones de seringueira [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell. Arg.], sob nove sistemas de sangria. O experimento foi instalado sob delineamento de blocos ao acaso com parcelas subdivididas no tempo. Os tratamentos principais foram os clones PR 255, RRIM 600 e GT 1, submetidos aos seguintes sistemas de sangria: ½S d/3 6d/7.11m/y.ET 2,5% Pa La 8/y; ½S d/3 6d/7.11m/y.ET 5,0% Pa La 8/y; ½S d/4 6d/7.11m/y.ET 2,5% Pa La 8/y; ½S d/4 6d/7.11m/y.ET 5,0% Pa La 8/y; ½S d/5 6d/7.11m/y.ET 2,5% Pa La 8/y; ½S d/5 6d/7.11m/y.ET 5,0% Pa La 8/y; ½S d/7 6d/7.11m/y.ET 2,5% Pa La 8/y; ½S d/7 6d/7.11m/y.ET 5,0% Pa La 8/y e ½S d/2 6d/7.11m/y (testemunha). As variáveis...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Hevea brasiliensis; Economia; Borracha natural; Estimulação; Secamento do painel; Economy; Natural rubber; Stimulation; Brown bast.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/123769
Registros recuperados: 21
Primeira ... 12 ... Última
 

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