Transport Of Grains
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Effects of using chemical admixture with nanosilica in the consistency and mechanical strength of concrete
Resumo O desempenho do concreto depende do seu comportamento nos estados fresco e endurecido, haja vista que a trabalhabilidade corrobora para os processos de transporte e aplicação do material, enquanto a resistência mecânica garante eficácia e funcionalidade estrutural. Geralmente, estudos de misturas com nanosílica (nS) são voltados para análise d
Rev. IBRACON Estrut. Mater.. Publicado em: 20/05/2019
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2. Floral resins of Philodendron adamantinum (Araceae): secretion, release and synchrony with pollinators
ABSTRACT Philodendron is the only genus of Araceae in which resin release occurs in the inflorescence. The resinous secretion adheres to the smooth body surface of the pollinating scarab beetles and allows attachment of pollen grains, making its transport possible. In order to understand the process of resin synthesis and release to the external environment,
Acta Bot. Bras.. Publicado em: 04/06/2018
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3. First records of pollen rain in bromeliad tanks in an area of caatinga in northeastern Brazil
Species of Bromeliaceae have leaves in a spiral configuration. Because of the shape of the rosette thus formed and the imbricate configuration of the leaf sheaths, there is usually a tank in which rainwater and other components of the environment, including pollen grains, accumulate, making such tanks effective pollen rain collectors. The objective of this s
Acta Bot. Bras.. Publicado em: 2014-06
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4. ATRIBUTOS DE QUALIDADE EM SEMENTES DE TRIGO RECOBERTAS COM ZINCO DURANTE E APÓS ARMAZENAMENTO / ATTRIBUTES OF QUALITY SEEDS OF WHEAT ZINC COATED DURING AND AFTER STORAGE
Seed coating treatments are among the most interesting and potentially beneficial for enhancing the performance of the same. This fact, which helps the producer to improve the performance and development of seedlings, with the possibility the use of micronutrients such as zinc, in the seeds. Our objectives were to evaluate the effect of wheat seed coating wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
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5. Escoamento de fluidos complexos e transporte de partÃculas em geometrias irregulares. / Complex fluid flows and particle transport in irregular geometries.
In this work many types of incompressible laminar Newtonian and Non-Newtonian flows are studied. The interplay of these flows with complex geometries was investigated using computational modeling and numerical solution of the conservation of momentum and mass continuity equations. As a first step, the computational modeling of a network of pores was adopted
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011
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6. Nonlinear instabilities on a granular bed sheared by a turbulent liquid flow
The granular media is of great importance in our quotidian, and their transport by a fluid flow is frequently found in nature and in industry. When the shear stresses exerted by the fluid flow on a granular bed are bounded to some limits, a mobile granular layer known as bed-load takes place in which the grains stay in contact with the fixed part of the gran
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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7. Áreas fontes dos minerais pesados e sua distribuição sobre a plataforma continental sul-brasileira, uruguaia e norte-argentina
The heavy mineral fraction of sedimentary rocks and sediments can provide important information about provenance in sedimentary basins studies because some minerals or group of minerals can be traced to a source rock or terrain of specific composition. This work is a provenance study based on heavy mineral analyses of samples collected on the Rio Grande do S
Publicado em: 2010
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8. The new time of the cerrado: expansion of agricultural fronts and control of the storage of grains system / O novo tempo do cerrado: expansão dos fronts agrícolas e controle do sistema de armazenamento de grãos
The present work intends to analyze, in an ampler perspective, the main characteristics of the new time of the Cerrado. These are closely related to the propagation of fronts agricultural, that is, of modern agriculture, from the decade of 1970s. This agriculture, carried through in intensive way and on a large scale, introduced in the brazilian Cerrado a ne
Publicado em: 2009
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9. Translocation of the insecticide thiamethoxam in the phloem of castor bean and coffee plants. / TranslocaÃÃo do inseticida tiametoxam no floema de mamoneira e cafeeiro.
It was aimed in this work to investigate the translocation of thiamethoxam in the phloem of castor bean plant, used as model plant, the influence of adjuvants on the penetration of this insecticide in the leaves of this plant and its translocation in the phloem of coffee plant. Castor bean plants with three weeks of age, growing in nutrient solution and coff
Publicado em: 2009
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10. STUDIES ON THE DYNAMICS OF DENSE GRANULAR SYSTEMS / ESTUDOS DA DINÂMICA DE MATERIAIS GRANULARES DENSOS
Granular materials, due to their huge amount of industrial applications (from food industry to astrophysics), have been the object of an increasing number of studies throughout the last couple of decades. Much of the physical description concerning the behaviour of this kind of material, however, still eludes scientists, turning this field of research into a
Publicado em: 2009
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11. Difusão e sorção do isotiocianato alilo e o seu efeito no controle de Sitophilus zeamais e na qualidade do milho / Diffusion and sorption of allyl isothiocyanate and its effect on the control of Sitophilus zeamais and quality of maize
This study was done to evaluate allyl isothiocyante (AITC) transport through the grain bulk of maize, and determine its fumigant effect on different developmental phases of Sitophilus zeamais Motsch. (Coleoptera: Curculionidae) and on maize quality. The study was done in three steps at the Universidade Federal de Viçosa, in Viçosa, MG. In the first, the AI
Publicado em: 2008
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12. PROCESSAMENTO E CARACTERIZAÇÃO DE COMPÓSITOS SUPERCONDUTORES YBa2Cu3O7-d/ Ag
In this work is presented an experimental study on the effects of the addition of Ag to the system YBa2Cu3O7-d. The silver can be added to the YBa2Cu3O7-d system through the mixture with metallic Ag, with oxide of silver (Ag2O) or with nitrate of silver (AgNO3), using different techniques and forms of processing. The addition of silver to the YBa2Cu3O7-d sys
Publicado em: 2008