Ice Protection
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. A Review of Using Conductive Composite Materials in Solving Lightening Strike and Ice Accumulation Problems in Aviation
ABSTRACT: There are many problems facing aircraft in the air during flight, such as lightning strikes and ice accumulation on aircraft surfaces. These problems usually reduce aircraft efficiency and lead to serious accidents and fatalities. However, the current protection systems used to solve these problems of aircraft represent excessive energy usage, a ha
J. Aerosp. Technol. Manag.. Publicado em: 28/03/2019
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2. Ecomigrantes, refugiados ou deslocados ambientais: populações vulneráveis e mudança climática
Droughts, floods, severe storms, melting ice caps and consequent rise in sea level are some of the consequences of climate change. Concerning the human side of the climate change, some experts estimate that 200 million to 250 million people will be forced off their land by mid-century and the European Union itself has already established that migration press
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011
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3. Comparative study between trimetazidine and ice slush hypothermia in protection against renal ischemia/reperfusion injury in a porcine model
PURPOSE: The aim of the study was to compare the effects of renal ice slush hypothermia and the use of trimetazidine in the protection against ischemia/reperfusion (I/R) injury. MATERIALS AND METHODS: Fifteen farm pigs were submitted to left kidney ischemia and right nephrectomy during the same procedure. Animals were divided into three groups. Group 1 was s
International braz j urol. Publicado em: 2011-10
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4. Heat and mass transfer in two-phase flow around airfoils with aeronautical anti-ice systems. / Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos.
It is required to prevent ice accretion on wings and horizontal stabilizers because it may cause aerodynamic performance degradation, weight increase, flight control difficulties and, in critical cases, may lead to operational safety margins reduction. When aircraft flies through clouds containnig supercooled water droplets, which are in metastable equilibri
Publicado em: 2009
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5. Fauna bÃntica do infralitoral e alimentaÃÃo natural de Callinectes danae Smith, 1869 (Crustacea,Portunidae) nos estuÃrios dos rios Botafogo e Carrapicho, Pernambuco, Brasil
In tropical and subtropical regions are the mangroves to have favourable conditions for food, protection and reproduction of various species of animals. The estuarine complex of Santa Cruz Channel deserves attention for its high productivity and to present an intense fishing activity. In this context, the crab Callinectes danae Smith, 1869 has important role
Publicado em: 2008
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6. Resíduos de fenitrotion e esfenvalerato em grãos de milho e trigo, em alguns de seus produtos processados e sua ação residual sobre Sitophilus oryzae (L., 1763), Sitophilus zeamais Motsch.,1855 (Coleoptera: Curculionidae) e Rhyzopertha dominica (Fabr.,1792) (Coleoptera: Bostrichidae) / Fenitrothion and esfenvalerate residues in corn and wheat grain and in some of their processed products, and residual action on Sitophilus oryzae (L., 1763), Sitophilus zeamais Motsch., 1855 (Coleoptera: Curculionidae), and Rhyzopertha dominica (Fabr., 1792) (Coleoptera: Bostrichidae)
Because of the problems caused by insects in storehouses, chemicals have been chiefly used in Brazil to control these pests. However, success in solving problems with pests has been limited. In view of this, some aspects about stored grain protection were studied, among which are the following: 1) spray volume effect on grain moisture content, 2) stability o
Publicado em: 2006
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7. Modelagem e simulação da operação de sistema antigelo eletrotérmico de um aerofólio. / Modeling and simlulation of an electro-thermal airfoil anti-ice system operation.
An electro-thermal anti-ice system was simulated with a mathematical model developed in the present work. A 44.7 m/s (100 mph) and 89.4 m/s (200 mph) full potential flow around a 0.914 m (3 ft) chord NACA0012 airfoil with 0° angle of attack and the local water catch efficiency of 20 μm median volumetric diameter droplets impingement were calculated by
Publicado em: 2002
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8. IL-1β-converting enzyme (caspase-1) in intestinal inflammation
IL-1β-converting enzyme (ICE; caspase-1) is the intracellular protease that cleaves the precursors of IL-1β and IL-18 into active cytokines. In the present study, the effect of ICE deficiency was evaluated during experimental colitis in mice. In acute dextran sulfate sodium-induced colitis, ICE-deficient (ICE KO) mice exhibited a greater than 50% decrease
The National Academy of Sciences.
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9. IAP Suppression of Apoptosis Involves Distinct Mechanisms: the TAK1/JNK1 Signaling Cascade and Caspase Inhibition
The antiapoptotic properties of the inhibitor of apoptosis (IAP) family of proteins have been linked to caspase inhibition. We have previously described an alternative mechanism of XIAP inhibition of apoptosis that depends on the selective activation of JNK1. Here we report that two other members of the IAP family, NAIP and ML-IAP, both activate JNK1. Expres
American Society for Microbiology.
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10. Phylogenetic Analyses in Cornus Substantiate Ancestry of Xylem Supercooling Freezing Behavior and Reveal Lineage of Desiccation Related Proteins
The response of woody plant tissues to freezing temperature has evolved into two distinct behaviors: an avoidance strategy, in which intracellular water supercools, and a freeze-tolerance strategy, where cells tolerate the loss of water to extracellular ice. Although both strategies involve extracellular ice formation, supercooling cells are thought to resis
American Society of Plant Biologists.
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11. Protection against Murine Leukemia Virus-Induced Spongiform Myeloencephalopathy in Mice Overexpressing Bcl-2 but Not in Mice Deficient for Interleukin-6, Inducible Nitric Oxide Synthetase, ICE, Fas, Fas Ligand, or TNF-R1 Genes
Some murine leukemia viruses (MuLVs), among them Cas-Br-E and ts-1 MuLVs, are neurovirulent, inducing spongiform myeloencephalopathy and hind limb paralysis in susceptible mice. It has been shown that the env gene of these viruses harbors the determinant of neurovirulence. It appears that neuronal loss occurs by an indirect mechanism, since the target motor
American Society for Microbiology.
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12. A New Efficient Method of Topical Cooling and Rewarming of the Myocardium
Profound myocardial hypothermia (below 17° C, and more often around 12° C) is imperative in myocardial protection while the aorta is cross-clamped. Based on our experience in more than 800 open-heart operations, profound myocardial hypothermia can be achieved by very efficient topical cooling despite mild systemic hypothermia (30 to 33° C) and a small, si