example problem of heat transfer by convection
An experimental investigation of heat transfer and fluid flow in a rectangular duct with inclined discrete ribs
... Journal of Heat Mass Transfer 2003; 30(2): 241-250. [17] Bhagoria J.L. and Sahu M.M. Augmentation of heat transfer coefficient by using 900 broken transverse ribs on absorber plate of solar air heater, ... Investigation of heat transfer and friction for rib-roughened surfaces, Int. Journal of Heat & Mass Transfer 1978; 21: 1143-1156. [4] Webb R.L., Eckert E.R.G. and Goldstein R. J. Heat transfer ... Journal of Heat and Mass Transfer1 999; 42: 1597-1615. [16] Karwa R, Experimental studies of augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated...
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Ptinciples of heat transfer
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Tài liệu Báo cáo khoa học: Analysis of oxidative events induced by expanded polyglutamine huntingtin exon 1 that are differentially restored by expression of heat shock proteins or treatment with an antioxidant ppt
... presence of 50 m m dithiothreitol.Ten microliters of each sample lysate was transferred intoeach of two eppendorf tubes and treated for 15 min witheither 10 lL of the 1· DNPH solution or 10 lL of ... stimulate some of itsactivities because of better substrate availability is notyet known. The partial restoration of proteasomeactivities by Hsps contrasts with the lack of effectinduced by NAC. ... cell[17,19] by, for example, promoting the clearance of mutant protein by activating autophagy through theinhibition of mTOR [19]. Oxidative events may there-fore represent a problem that...
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Báo cáo khoa học: Differential recognition of heat shock elements by members of the heat shock transcription factor family ppt
... protein) of YYY49 and YYT42 con-tained approximately 1 and 2 ng of hHSF2, and those of YYT50 andYYT17 contained approximately 0.01 and 0.1 ng of hHSF4, asjudged by the intensity of each band. ... the folding of damaged proteins, andincreased accumulation of HSPs is essential for sur-vival of cells exposed to protein-damaging stresses,including heat shock. The structure of HSF comprisesa ... generation,Keywordscrystallin; heat shock element; heat shockprotein; heat shock response; heat shocktranscription factorCorrespondenceH. Sakurai, Department of ClinicalLaboratory Science,...
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Báo cáo khoa học: Small heat shock protein Hsp27 prevents heat-induced aggregation of F-actin by forming soluble complexes with denatured actin docx
... effect of Hsp27-3D on the heat- induced aggregation of F-actin. (A) F-actin (1.0 mgÆmL)1) washeated at a constant rate of 1 C°Æmin)1in the absence (curve 1) orin the presence (curves 2–4) of ... that, upon heating, thermal unfolding of F-actin is accompanied by formation of stable, solu-ble complexes of Hsp27-3D with denatured actin thatcontain roughly equal quantities of denatured ... Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia2 School of Bioengineering and Bioinformatics, Moscow State University, Russia3 Department of Biochemistry, School of Biology,...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 1 of 3
... types of latent heat. The first is the latent heat of fusion. Thisis the amount of heat added or removed to change phase between solid and liquid. The secondtype of latent heat is the latent heat ... ENERGY, WORK, AND HEAT Another type of heat is called latent heat. Latent heat is the amount of heat added to or removedfrom a substance to produce a change in phase. When latent heat is added, ... different magnitudes by the addition of heat. When a givenamount of heat is added to different substances, their temperatures increase by different amounts.The ratio of the heat (Q) added to or...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 2 of 3
... modes of heat transfer: Conduction involves the transfer of heat by the interactions of atoms or molecules of amaterial through which the heat is being transferred. Convection involves the transfer ... HT-02 Heat Transfer CONVECTION HEAT TRANSFER SummaryThe important information in this chapter is summarized below. Convection Heat Transfer Summary• Convection heat transfer is the transfer of ... ormolecules of a material through which the heat is being transferred. Convection involves the transfer of heat by the mixing and motion of macroscopic portions of a fluid.Radiation, or radiant heat transfer, ...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 3 of 3
... is used by engineers in reference to pressure. It is a referenceto the height, typically in feet, of a column of water that a given pressure will support. Each of the energies possessed by a fluid ... all of its kinetic energy were converted to potential energy. Thepressure head represents the flow energy of a column of fluid whose weight is equivalent to thepressure of the fluid.The sum of ... characteristic of viscous (thick) fluid or isone in which viscosity of the fluid plays a significant part.Turbulent FlowTurbulent flow is characterized by the irregular movement of particles of the...
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Báo cáo khoa học: Structural basis of charge transfer complex formation by riboflavin bound to 6,7-dimethyl-8-ribityllumazine synthase docx
... facilitates theformation of a unique tetrade comprising of a pair of riboflavins with an antiparallel staggering of their isoallox-azine moieties, sandwiched by the indole groups of thesymmetry-related ... steps of catalysis [9]. The orientation of H94 var ies according to the bound ligand but is nearlyindependent of the nature of residue 27. In the case of thetwo substrate analogue complexes of ... superpositions of the a mino acid residuesin the a ctive s ite of t he A. aeolicus enzymewith the ones of thewild-type and th e mutant e nzyme of S. pombe in Fig. 8shows t hat t he phenyl ring of residue...
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Báo cáo khoa học: Regulation of phospholipid biosynthesis by phosphatidylinositol transfer protein Sec14p and its homologues pot
... condition of high PtdCho turnover, the addition of inositol canconsume part of the PA pool, permitting that partialrepression of INO1 transc ription. Alternatively, the a ddi-tion of inositol ... 4405 by the following lines of evidence (Fig. 1), namely that(a) mutations in genes encoding structural enzymes of thecytidine diphosphate choline (CDP-choline) pathway forPtdCho biosynthesis bypass ... niversity of NorthCarolina, Chapel Hill, NC, U SA) into YCplac22, by usingEcoRI and HindIII restriction enzymess [23].Gene disruption. Disruption of the Pld1p gene in strainPGY209 was p erformed by...
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Báo cáo khoa học: Suppression of heat- and polyglutamine-induced cytotoxicity by nonsteroidal anti-inflammatory drugs potx
... incubated for 6 h , the cellular levels of Hsp105a and Hsc70 (a constitutive isoform of Hsp70)increased, and t he expression of Hsp70 (an inducibleisoform of Hsp70) was markedly induced (Fig. ... activation of HSF by NSAIDs may bein part caused by the inhibition of these e nzymes, b y w hichthe cellular concentration of arachidonate increases.IND induced thermotolerance of cells, whereas ... caused by an expanded polyQ tract is suppressed by o verexpression of Hsp105a or Hsp70 in the cellular model [9,11], thesuppression by NSAIDs seemed to be due to the a ccumu-lation of hsps by these...
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