Silicic Acid
Mostrando 1-12 de 72 artigos, teses e dissertações.
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1. Silicon as resistance inducer in to control black aphid Aphis craccivora Koch, 1854 in Phaseolus lunatus lima beans
RESUMO São poucos os registros no Brasil de insetos associados à cultura da fava; entre eles, destaca-se o pulgão preto Aphis craccivora Koch, 1854. O objetivo deste estudo foi avaliar os efeitos da aplicação de silício na indução de resistência de plantas de feijão-fava Phaseolus lunatus a esse inseto. O experimento foi conduzido no Laboratório d
Arq. Inst. Biol.. Publicado em: 28/11/2019
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2. Efeitos do silÃcio sobre as lagartas-chave e seus inimigos naturais em milho e girassol. / Effects of silicon on the key caterpillars and its natural enemies in maize and sunflower
A lagarta-do-cartucho do milho, Spodoptera frugiperda (J. E. Smith, 1797) e a lagarta-do-girassol Chlosyne lacinia saundersii (Doubleday &Hewitson, 1847) sÃo consideradas pragas chaves, respectivamente, das culturas de milho e de girassol. Este trabalho foi realizado para avaliar os efeitos da aplicaÃÃo de silÃcio em alguns aspectos biolÃgicos de S. fru
Publicado em: 2009
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3. Indutores de resistÃncia e interaÃÃo silÃcio-inseticida sistÃmico no controle de Schizaphis graminum (Rond.) (Hemiptera: Aphididae)em trigo. / Resistance inducers and silicic-sistemic inseticide in the Schizaphis graminum (Rond.) (Hemiptera:Aphididae)control on wheat.
O pulgÃo-verde Schizaphis graminum (Rond.) (Hemiptera: Aphididae) à um dos principais insetos-praga da cultura do trigo, sendo capaz de levar a planta à morte pela sucÃÃo de seiva e injeÃÃo de toxina, alÃm de transmitir vÃrus. Uma tÃtica recomendada para o manejo de pulgÃes em trigo à a utilizaÃÃo de inseticidas seletivos, principalmente no tra
Publicado em: 2008
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4. Processos metalogenéticos em ambientes de arco magmático tipo andino, caso de estudo: mineralizações da região dos Andes Patagônicos setentrionais do Chile / Metallogenic processes in andean volcanic arc setting, study case: mineralizations in the Chilean North-Patagonion Andes
In the Patagonian Andes region between 41 and 44° S extensive and continuous plutonic rocks of the North-Patagonian Batholith north segment are exposed. During their evolution most of the granitic rocks were emplaced in metamorphic rocks and other parts were emplaced in Late Jurassic-Berriasan volcanic rocks, Early Cretaceous sedimentary and volcanic rocks,
Publicado em: 2008
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5. âProgresso da cercosporiose e da ferrugem do cafeeiro (Coffea arabica L.) em funÃÃo da aplicaÃÃo de silÃcioâ / Progress of brown-eye spot and rust in coffee plants (Coffea arabica L.) treated with silicon.
The effect of adding silicon on the reduction of the brown-eye spot and rust intensities in coffee plants was evaluated in the present work in a set of four experiments. In the experiment 1, performed under field conditions, commercial silicon sources (A and B) were applied solely or in combination with fungicides: copper hydroxide, azoxystrobin and cyprocon
Publicado em: 2006
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6. Effect of silicon on the resistance of corn plants to Rhopalosiphum maidis (Fitch.) (Hemiptera: Aphididae) and its interaction with insecticide in the control of Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae) / Efeito do silÃcio na resistÃncia de plantas de milho a Rhopalosiphum maidis (Fitch.) (Hemiptera: Aphididae) e sua interaÃÃo com inseticida no controle de Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae)
The action of pest insects is one of the factors responsible for the low level of yield of the corn in Brazil, and in this context, the corn aphid and the fall armyworm are considered the main corn pests. The control, chiefly, of the fall armyworm is accomplished almost exclusively by insecticide applications, which can cause, inclusive, damages to the envir
Publicado em: 2006
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7. Sinteses de cordierita por sol-gel utilizando TEOS ou acido silicico : a influencia do acido citrico na cristalização
Cordierite (2MgO.2Al2O3.5SiO2) is a strategically important glass-ceramics with interesting mechanical, thermal and chemical properties. The addition of organic acids on ceramic material precursors obtained by sol-gel synthesis has been reported. Additives can modify temperature and rate of cordierite crystallization, as well as the crystalline phase yeld. T
Publicado em: 2003
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8. Studies on the Nature of Silicosis: A Suggested Mechanism of Fibrogenesis
One theory which seeks to explain the production of fibrous tissue in silicosis postulates the interaction of collagen precursors with polysilicic acid. This stage has been questioned because it is doubtful whether polymerized silicic acid is normally formed when quartz dissolves in aqueous media. A mechanism by which silicic acid may be polymerized in vivo
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9. The Effect of Different Concentrations of Silicic Acid and Silica Dust on the Biosynthesis of Collagen in Tissue Cultures
Tissue cultures of fibrogenic cells which form collagen in vitro are a valuable model for quantitative study of the mechanism of this cellular function as well as of problems relevant to pneumoconiosis. We have found a pronounced stimulation of collagen formation in tissue cultures of embryonic chicken lung by silicic acid in a concentration of 0·005M in th
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10. Simple procedure for the removal of nonspecific inhibitors of rubella virus hemagglutination.
The adsorption of serum lipoproteins onto an insoluble matrix of colloidal silicic acid results in the removal of nonspecific inhibitors of rubella virus hemagglutinin. The procedure can be performed in 15 min at room temperature. Comparative studies using both the dextran sulfate-CaCl2 and heparin-MnCl2 methods for removal of inhibitors demonstrated that th
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11. The Preparation of Silicic Acid Jellies for Bacteriological Media
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12. The Preparation of Silicic Acid Jellies for the Cultivation of Microorganisms