Ethylene Blocks
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Avaliação de técnicas alternativas para o manejo da antracnose da banana em pós-colheita
The banana is the second fruit more consumed in the world, being the fruit fresh holder of larger world market. Brazil, answers as second producing adult, using the varieties Silver and Pacovan in approximately 60% of area harvestd. However, several factors can cause losses in the production. In the powder-crop to the anthracnose, caused by Colletotrichum mu
Publicado em: 2009
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2. Sintese de poli (esteres-uretanas) a base de poliois de poli (hidroxibutirato) e poli (caprolactona) / Synthesis of poly (ester-urethanes) from poly (hydroxybutyrate) and poly (caprolactone)
The synthesis of polyurethanes containing PHB and PCL blocks aims to obtain materials with controlled mechanical properties maintain biodegradable and biocompatible polymers such as poly(hidroxybutyrate) (PHB) and poly(caprolactone) (PCL) have been largely studied. The synthesis of polyurethanes containing blocks of PHB and PCL aims to obtain materials with
Publicado em: 2008
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3. "Efeito do teor de tanino do sorgo sobre a fermentação ruminal e parâmetros nutricionais de ovinos" / Effect of sorghum tannins on ruminal fermentation and sheep nutritional parameters
Sorghum bicolor (L.) Moench is an important cereal crop used in animal nutrition. However, this plant produces secondary compounds, such as condensed tannin, which are able to interfere in the animal digestion. Condensed tannins are macromolecules that can bind to other molecules such as protein and carbohydrates reducing the fully utilization of nutrients b
Publicado em: 2004
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4. Estudos praticos e teoricos da influencia das bases de Lewis em polimerização e co-polimerização de olefinas por TiCL4/TiO2(reduzido)
Heterogeneization of titanium tetrachloride on chemically reduced titanium dioxide, developed in our group, has been used as a very active catalyst for ethylene polymerization. This catalytic system although polymerizing propylene with lesser activity , yields a polymer with low polydispersity , high molar mass and isotacticity of 78%. The isotacticity of th
Publicado em: 2000
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5. Propriedades mecanicas e termicas, morfologia e reologia de blendas de poliamida-6 e elastomeros
Blends of polyamide-6 (PA-6) and elastomers is the central subject of this thesis. The work can be subdivided in three parts according to the type of rubber used, each part has specific objectives. In the first part, the mechanical properties and phase morphology of ternary blends of polyamide 6 with rubber, e.g., maleated ethylene-propylene random copolymer
Publicado em: 1999
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6. Two Arabidopsis Mutants That Overproduce Ethylene Are Affected in the Posttranscriptional Regulation of 1-Aminocyclopropane-1-Carboxylic Acid Synthase1
The Arabidopsis mutants eto1 (ethylene overproducer) and eto3 produce elevated levels of ethylene as etiolated seedlings. Ethylene production in these seedlings peaks at 60 to 96 h, and then declines back to almost wild-type levels. Ethylene overproduction in eto1 and eto3 is limited mainly to etiolated seedlings; light-grown seedlings and various adu
American Society of Plant Physiologists.
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7. The never ripe mutation blocks ethylene perception in tomato.
Seedlings of tomato fruit ripening mutants were screened for their ability to respond to ethylene. Ethylene induced the triple response in etiolated hypocotyls of all tomato ripening mutants tested except for one, Never ripe (Nr). Our results indicated that the lack of ripening in this mutant is caused by ethylene insensitivity. Segregation analysis indicate
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8. Molecular and Genetic Characterization of a Novel Pleiotropic Tomato-Ripening Mutant1
In this paper we describe a novel, dominant pleiotropic tomato (Lycopersicon esculentum)-ripening mutation, Cnr (colorless nonripening). This mutant occurred spontaneously in a commercial population. Cnr has a phenotype that is quite distinct from that of the other pleiotropic tomato-ripening mutants and is characterized by fruit that show greatly reduced et
American Society of Plant Physiologists.
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9. Increased levels of adenosine 3',5'-cyclic monophosphate in Tetrahymena stimulated by glucose and mediated by Ca2+ and epinephrine.
Stationary phase Tetrahymena cells exposed to 0.5-1% glucose experience an 8-fold increase in intracellular cyclic AMP within 1 hr. The increase follows an enhanced uptake of Ca2+ triggered by the glucose addition. Inhibiting the Ca2+ influx with ethylene glycol bis(beta-aminoethyl ether)-N,N,N',N'-tetraacetic acid blocks the increase in cyclic AMP, but the
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10. The Role of Phytochrome in an Interaction with Ethylene and Carbon Dioxide in Overcoming Lettuce Seed Thermodormancy 1
Ethylene and CO2 were used to control induction of germination in thermodormant lettuce seed (Lactuca sativa L.). These experiments ultimately showed that germination depends on the presence of an active form of the phytochrome. The phytochrome system is functional and stable at 35 C, a temperature which completely inhibits germination. Phytochrome responses
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11. Disruption of the Polar Auxin Transport System in Cotton Seedlings following Treatment with the Defoliant Thidiazuron
The effect of the defoliant thidiazuron (TDZ) on basipetal auxin transport in petiole segments isolated from cotton (Gossypium hirsutum L. cv LG102) seedlings was examined using the donor/receiver agar block technique. Treatment of intact seedlings with TDZ at concentrations of 1 micromolar or greater resulted in a dose-dependent inhibition of 14C-IAA transp
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12. Expression of a chimeric polygalacturonase gene in transgenic rin (ripening inhibitor) tomato fruit results in polyuronide degradation but not fruit softening.
Tomato fruit ripening is accompanied by extensive degradation of pectic cell wall components. This is thought to be due to the action of a single enzyme, polygalacturonase, whose activity is controlled, at least in part, at the level of gene expression. At the onset of tomato fruit ripening, polygalacturonase enzyme activity, mRNA levels, and relative rate o