Permeable Tube
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Modelagem analítico-numérica do escoamento laminar convectivo em tubos associada à filtração tangencial / Analytical-numerical modeling of convective laminar flow in tubes associated with cross-flow
Nesta tese de doutorado é utilizada a técnica híbrida analítico-numérica, conhecida internacionalmente por GITT (Generalized Integral Transform Technique), para modelagem e simulação da equação de conservação das espécies químicas, na investigação do escoamento laminar incompressível, newtoniano e permanente em tubos permeáveis. O escoamento
Publicado em: 2008
-
2. Modelagem numérica do escoamento num tubo permeável aplicada ao processo de filtração tangencial / Numerical modeling of the flow in permeable tube applied to the cross-flow filtration process
Estudos aplicados ao processo de filtração tangencial têm sido o objetivo de muitos trabalhos devido a sua ampla capacidade de adequação aos mais diversos processos industriais. Os mecanismos de transferência associados a esse processo envolvem basicamente o escoamento em tubos permeáveis (ou membranas) com fenômenos de transferência de massa presen
Publicado em: 2008
-
3. Ca2+-Permeable Channels in the Plasma Membrane of Arabidopsis Pollen Are Regulated by Actin Microfilaments1
Cytosolic free Ca2+ and actin microfilaments play crucial roles in regulation of pollen germination and tube growth. The focus of this study is to test the hypothesis that Ca2+ channels, as well as channel-mediated Ca2+ influxes across the plasma membrane (PM) of pollen and pollen tubes, are regulated by actin microfilaments and that cytoplasmic Ca2+ in poll
American Society of Plant Biologists.
-
4. The presence of a heterotrimeric G protein and its role in signal transduction of extracellular calmodulin in pollen germination and tube growth
The role of heterotrimeric G proteins in pollen germination, tube growth, and signal transduction of extracellular calmodulin (CaM) was examined in lily pollen. Two kinds of antibodies raised against animal Gzalpha, one against an internal sequence and the other against its N terminus, cross-reacted with the same 41-kD protein from lily pollen plasma membran
-
5. Time-dependent diffusion in tubes with periodic partitions
The presence of obstacles leads to a slowdown of diffusion. We study the slowdown when diffusion occurs in a tube, and obstacles are periodically spaced identical partitions with circular apertures of arbitrary radius in their centers. The mean squared displacement of a particle diffusing in such a system at large times is given by ⟨Δx2(t)⟩=2Defft, t→
American Institute of Physics.
-
6. Directional Guidance of Nicotiana alata Pollen Tubes in Vitro and on the Stigma1
Pollen tubes navigate the route from stigma to ovule with great accuracy, but the cues that guide them along this route are not known. We reproduced the environment on the stigma of Nicotiana alata by immersing pollen in stigma exudate or oil close to an interface with an aqueous medium. The growth of pollen in this culture system mimicked growth on sti
American Society of Plant Physiologists.
-
7. ADP-induced rapid inward currents through Ca(2+)-permeable cation channels in mouse, rat and guinea-pig megakaryocytes: a patch-clamp study.
1. The rapid inward currents in mouse megakaryocytes evoked by adenosine diphosphate (ADP), a ubiquitous platelet-activating substance, were studied. Time and current resolution were improved by using patch-clamp recording and an extracellular fast perfusion ("Y tube') technique. 2. Application of ADP (40 microM) to megakaryocytes immersed in physiological s
-
8. Gas vesicles.
The gas vesicle is a hollow structure made of protein. It usually has the form of a cylindrical tube closed by conical end caps. Gas vesicles occur in five phyla of the Bacteria and two groups of the Archaea, but they are mostly restricted to planktonic microorganisms, in which they provide buoyancy. By regulating their relative gas vesicle content aquatic m
-
9. Extraplacental transfer of water in the sheep.
1. Ten pregnant ewes were operated on at 130 days of gestation. The fetal trachea was intubated with a double-lumen tube, an inflatable occluder was placed around the umbilical cord, vascular catheters were placed in the fetal carotid artery and jugular vein and in the maternal jugular vein, and multiple catheters were placed in the amniotic and allantoic sa