Castor Bean Ricin
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Terrorismo químico: proposta de modelagem de risco envolvendo ricina em eventos de grande visibilidade no Brasil
RESUMO Grandes eventos estão no centro de estratégias terroristas e vem-se repetindo com frequência no âmbito internacional. Durante os últimos anos, o Brasil é palco de megaeventos esportivos; e este ano sediará a Copa do Mundo Fifa Sub-17. Assume-se que a maior exposição, nesses contextos, aumenta a vulnerabilidade ante as ameaças não convencion
Saúde debate. Publicado em: 13/01/2020
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2. Analysis of castor bean ribosome-inactivating proteins and their gene expression during seed development
Ribosome-inactivating proteins (RIPs) are enzymes that inhibit protein synthesis after depurination of a specific adenine in rRNA. The RIP family members are classified as type I RIPs that contain an RNA-N-glycosidase domain and type II RIPs that contain a lectin domain (B chain) in addition to the glycosidase domain (A chain). In this work, we identified 30
Genet. Mol. Biol.. Publicado em: 18/01/2013
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3. Determinação voltamétrica de ricina em mamona usando carbono vítreo e diamante dopado com boro / Voltammetric determination of ricin in castor bean using gassy carbon and boron doped diamond.
Ricin (RCA 60) is an inhibitor of ribosomes protein toxic, of class II, extracted from castor bean endosperm of the seed, consisting of two peptide chains (RCA-A 30 and RCA-B 30) linked by a disulfide bridge covalently formed by the combination of 17 amino acid residues. Its toxicity has been observed in animals, insects and humans, being by inhalation, inge
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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4. Simultaneous allergen inactivation and detoxification of castor bean cake by treatment with calcium compounds
Ricinus communis L. is of great economic importance due to the oil extracted from its seeds. Castor oil has been used for pharmaceutical and industrial applications, as a lubricant or coating agent, as a component of plastic products, as a fungicide or in the synthesis of biodiesel fuels. After oil extraction, a castor cake with a large amount of protein is
Braz J Med Biol Res. Publicado em: 2012-11
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5. Desempenho produtivo de vacas lactantes alimentadas com farelo de mamona tratado com óxido de cálcio / Performance of dairy cows fed with castor meal treated with calcium oxide
O crescimento da participação de biodiesel na matriz energética mundial aumentou o interesse no cultivo e processamento de oleaginosas, criando oportunidades para a produção de ruminantes pela possibilidade de utilização de co-produtos resultantes do processo de extração do óleo das sementes dessas oleaginosas. A mamona (Ricinus communis L.) é uma
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/03/2010
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6. Acúmulo de ricina em sementes de mamona e silenciamento do gene em plantas geneticamente modificadas
Castor bean (Ricinus communis L.) is an oilseed of great economic and social importance. The oil extracted from its seeds is used in biodiesel production and as raw material for chemicals, cosmetics and lubricants. Besides the oil extracted from the seeds, their production chain generates side-products, which can be used as organic fertilizer of good quality
Publicado em: 2010
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7. Desempenho de novilhas leiteiras alimentadas com farelo de mamona e valor energético do farelo e torta de mamona / Performance of dairy heifers fed with castor meal and energy value of the bran and castor bean
A crescente busca por alternativas que promovam a sustentabilidade da unidade de produção, definidas, principalmente, pelas questões ambientais, econômicas e sociais, tornam-se alvos das atuais pesquisas. O uso da biomassa como insumo energético ganha espaço na discussão sobre o desenvolvimento de uma matriz energética mundial mais sustentável. O cr
Publicado em: 2010
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8. Desempenho e avaliação nutricional de dietas contendo farelo de mamona para bovinos / Performance and nutritional evaluation of diets containing castor meal to cattle
The castor bean (Ricinus communis L.) has been traditionally cultivated in some parts of Brazil with an economic and social role. Thus, because of the high potential of productivity that this culture shows, there is a possibility to increase the use of the castor beans by- products as a protein source in ruminant diets. In order to evaluate the use of castor
Publicado em: 2009
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9. Produção de etanol a partir de torta de mamona (Ricinus communis L.) e avaliação da letalidade da torta hidrolisada para camundongos
The castor bean cake is rich in starch (48 ± 0.53%) and bears a problem linked to the occurrence of a toxic protein (ricin). The chemical hydrolysis (ratio solid:liquid = 1:6; H2SO4= 0.1 mol L-1; 120 °C; 40 min) generated a medium with 27 g L-1 of reducing sugars (hydrolysis efficiency= 32%). The hydrolyzed product was fermented and produced 11 g L-1 of et
Química Nova. Publicado em: 2008
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10. Ricin inhibition of in vitro protein synthesis by plant ribosomes
In vitro translation systems were prepared with supernatant factors from wheat germ and 80S ribosomes from wheat germ, barley embryos, watermelon cotyledons, pea cotyledons, and castor bean endosperm. Ricin A-chain, which strongly inhibits protein synthesis by mammalian ribosomes, inhibited all of the plant ribosomal systems by 50% when present at 25-45 μg/
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11. Genomic cloning and characterization of a ricin gene from Ricinus communis.
A genomic clone that specifies a single polypeptide precursor for ricin, a toxic lectin of Ricinus communis (castor bean), was isolated, sequenced and Sl mapped. The gene encodes a 64 kDa precursor which contains, in the following order: a 24 or 35 amino acid signal peptide, the A chain, a 12 amino acid linker peptide, and the B chain. The 5'-end of the rici
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12. Selection and characterization of ricin toxin A-chain mutations in Saccharomyces cerevisiae.
A DNA sequence encoding the A chain of ricin toxin (RTA) from the castor bean plant, Ricinus communis, was placed under GAL1 promoter control and transformed into Saccharomyces cerevisiae. Induction of expression of RTA was lethal. This lethality was the basis for a selection of mutations in RTA which inactivated the toxin. A number of mutant alleles which e