shear stress in laminar flow

... Coté May 2006 Major Subject: Biomedical Engineering iii ABSTRACT A Biomedical Engineering Approach to Investigating Flow and Wall Shear Stress in Contracting Lymphatics (May 2006) James Brandon ... Road P.O Box 1346 Ann Arbor, MI 48106-1346 ii A BIOMEDICAL ENGINEERING APPROACH TO INVESTIGATING FLOW AND WALL SHEAR STRESS IN CONTRACTING LYMPHATICS A Dissertation by JAMES BRANDON DIXON Submitted ... wall shear stress This should come as no surprise because wall shear stress is one of the main mechanotransduction factors involved in vascular growth and remodeling [26-28, 30, 36] The main question...

Ngày tải lên: 13/11/2014, 11:06

... together Shearing stresses in a channel section; shear centre 10.7 259 Shearing stresses in a channel section; shear centre We have discussed the general case of shearing stresses in the bending of ... of shearing stress T* in the web is parabolic in form, attaining a maximum value (10.22) at the mid-depth of the web, Figure 10.13 The shearing stresses T , in the flanges imply total shearing ... Determine the maximum value of the shearing stress and the shear centre position ‘e’ for the thin-walled split tube in the figure below Shearing stresses in beams 262 Solution Consider an infinitesimally...

Ngày tải lên: 08/04/2014, 11:28

... minutes Studies conducted in recent years indicate that shear stress induced NO leads to the expression of genes participating in liver regeneration including c-fos [6-8] There ... weighing the removed lobes following surgery and the regenerating liver at the indicated time point For PCNA immunostaining, specimens were fixed in paraformaldehyde, embedded in paraffin and ... following shear stress (data not shown) LECs displayed perinuclear and cytoplasmic localization of VEGFR-2 and neuropilin (Fig 4) Following exposure to shear stress conditions (10 dynes/cm2/15 minutes),...

Ngày tải lên: 13/08/2014, 13:20

... effective in reducing the WSS in low pseudoshear rates corresponding to venular flows, but insignificant in affecting WSS in high pseudoshear rates corresponding to arteriolar flows However, increased ... Shear Stress WSSmed Medium Wall Shear Stress WSSrel Relative Wall Shear Stress µ Water Viscosity µmed Medium Viscosity τw Wall Shear Stress γ Pseudoshear Rate xi CHAPTER INTRODUCTION 1.1 Clinical ... pseudoshear rates in microtubes of ID 30 µm (○), 50 µm (∆) and 100 µm (□) in three aggregating mediums (A): in non-aggregating blood suspended in PBS; (B): in normal aggregating blood; (C): in disease...

Ngày tải lên: 05/10/2015, 18:59

... Engineering, National University of Singapore, Engineering Drive 1, Singapore, 117576 Singapore 2Minerals, Metals and Materials Technology Centre, National University of Singapore, Engineering ... the base working fluid Since the convective heat transfer inside the tube is directly linked to flow behavior, it is of interest to investigate the flow patterns inside the tubes In our previous ... performance in coiled flow inverter vis-a-vis conventional heat exchanger Chem Eng Sci 2010, 65:999-1007 Liou TM: Flow visualization and LDV measurement of fully developed laminar flow in helically...

Ngày tải lên: 21/06/2014, 03:20

... B.S in Mechanical Engineering from the Tehran University in 1965 He received his M.S degree in Civil Engineering from the Purdue University 1968 and his Ph.D degree in Mechanical Engineering ... deposition efficiency in a fully developed flow in a cylindrical tube and in the entrance region of a cylindrical tube [3, 4] For laminar parabolic flow conditions, Yeh and Schum in 1980 [5] derived ... exact solution for laminar pipe flow regime The exact solution for the laminar flow in the cylinder is a parabolic profile for the velocity, which is given as [16]: u (r ) = 2u in (1 − r2 R2 ) (7)...

Ngày tải lên: 09/09/2015, 10:06

... arginase in the study AS and AL activities increased in all the three brain regions significantly in anoxia suggesting an increased utilization of citrulline for the production of arginine in ... observed by increase in NOx concentration in this study support the earlier findings of NO involvement in pathophysiology of hypobaric hypoxia in brain (42-43) In this study the increased activity ... citrulline generated as a by-product can be recycled to arginine by successive actions of argininosuccinate synthetase (AS; EC 6.3.4.5) and argininosuccinate lyase (AL; EC 4.3.2.1) via the citrulline-NO...

Ngày tải lên: 26/10/2012, 09:07

... to preSENT, to exPORT, to deCIDE, to beGIN Nhấn vào âm tiết thứ hai tính từ cuối – Words ending in -ic: e.g: GRAPHic, geoGRAPHic, geoLOGic – Words ending in -sion and -tion: e.g: contriBUtion, ... cuối – Words ending in -cy, -ty, -phy and -gy: e.g: deMOcracy, dependaBIlity, phoTOgraphy, geOLogy – Words ending in -al: e.g: CRItical, geoLOGical Từ ghép – For compound nouns, the stress is on ... compound adjectives, the stress is on the second part: e.g: bad-TEMpered, old-FASHioned – For compound verbs, the stress is on the second part: e.g: to underSTAND, to overFLOW II Cách tìm trọng...

Ngày tải lên: 20/08/2013, 07:54

... on the final syllable Three- syllable (v) enterTAIN (v)introDUCE (V)recomMEND 18 5.Rules for primary stress Word type Nouns with both the second syllable and the final syllable contain a short ... -found in words of or syllables E.g IN, dustriali’sation Secondary stress - the strongest type of stress marked by a small vertical E.g.: in, dustriali’SAtion Primary stress www.themegallery.com Company ... IS THE TOPIC? STRESS OF WORDS By: Ms Le Ngoc Han OUTLINE Aims Definition Levels Key terms Rules Q & A Exercises WHY WORD STRESS? Aims catch up with native speakers while communicating produce much...

Ngày tải lên: 30/11/2013, 16:11

... location in a machine part should never be combined with stress components for a different location in the same part One of the interesting developments in visualizing the combining of stress components ... tutorial is designed to introduce and place strong emphasis on the role of 3-D stress in the process of mechanical design Students in engineering are normally introduced to stress in its simplest onecomponent ... the normal stress, σ, and shear stress, τ axes and plot the coordinate pair (σx, τxy ) at point A and then (σy , τyx) at point B Connecting these points locates the circle center at point C Geometrical...

Ngày tải lên: 16/12/2013, 08:15

... [2,19,20], immediately after pilocarpine administration, animals persistently show behavioral changes, including initial akinesia, ataxic lurching, peripheral cholinergic signs (miosis, piloerection, ... Oxidative stress after status epilepticus in rats Table Superoxide dismutase [UÆ(mg protein))1] and catalase [mmolÆmin)1Æ(lg protein))1] activities in the hippocampus of adult rats after pilocarpine-induced ... oxidative stress Our findings show that pilocarpine induces SE, which can produce alterations in superoxide dismutase and catalase activities in different areas, thereby protecting the brain from...

Ngày tải lên: 19/02/2014, 16:20

... determinants of parenting stress in mothers of children with CHD Social support explained 33.3% of parenting stress in this model, while social support and the source of information being the Internet ... support, and parenting stress Multiple regression analysis was used to determine the factors affecting parenting stress Asian Nursing Research ❖ September 2007 ❖ Vol ❖ No Parenting Stress in Mothers ... parenting stress in the prior analysis, sources of information, uncertainty and social support were also included in the analysis model Social support and source of information via the Internet...

Ngày tải lên: 05/03/2014, 12:20

... Overcoming Secondary Stress in Medical and Nursing Practice This page intentionally left blank introduction Reaching Out Without Being Pulled Down Remaining Passionate in the Fields of Medicine, ... strengthening one’s inner life Finally, as the brief epilogue’s title (“Passionate Journeys”) indicates, this book is also about maintaining and increasing the passion one originally had for being ... life in this demanding field By using it alone, with a mentor, or in a small group, it can aid in providing information that will improve self-awareness and stress prevention in the medical setting...

Ngày tải lên: 06/03/2014, 13:20

... stress responsiveness of auxin-responsive genes These results indicate the existence of a complex system, including several auxin-responsive genes, that is operative during stress signaling in ... that genes involved in cytokinin (e.g cytokinin-Oglucosyltransferase, cytokinin dehydrogenase, and response regulators), ethylene (e.g ethylene-responsive transcription factor, 1-aminocyclopropane-1-carboxy3150 ... carried out in other plants The recent advances in genomics provide opportunities to investigate these pathways in crop plants To gain insights into the molecular mechanism of auxin action in rice,...

Ngày tải lên: 07/03/2014, 01:20

... functions, in addition to having supporting functions for oxidative defences [79], involving the thioredoxin system [40] Aconitase acts also as an iron-responsive element binding protein, isocitrate ... Ca2+ overloading and other factors including oxidative stress [88,89] In neurons the presence of PTP in situ has not gained wide acceptance among investigators and results published in the literature ... few minutes later leads to an irreversible and sustained increase in intracellular [Ca2+]c in apical dendrites [151] DCD is invariably demonstrated in every neuronal cell type studied, i.e spinal...

Ngày tải lên: 07/03/2014, 12:20

... ERSE-like Xbp1 binding-like P-UPRE ERSE-like ERSE-like ERSE-like Xbp1 binding-like Xbp1 binding-like ERSE-like – ERSE-like Xbp1 binding-like Xbp1 binding-like ERSE-like – ERSE-like – Xbp1 binding-like ... equilibrated with the urea-binding buffer After washing the cartridge with the urea-binding buffer, the luminal domain of At SEL-1L was eluted with the urea-binding buffer containing m imidazole, and ... phosphorylating the specific serine residue of eIF2a [51] to protect cells from the stress P58IPK inhibits PKR-mediated translational arrest by inactivating the kinase by binding to the domain of PKR...

Ngày tải lên: 07/03/2014, 21:20

... activity, and the C-terminal domain, containing an iron-binding domain, which is involved in ADH activity The integrity of both domains and that of the iron-binding domain are required for ALDH ... solubilized extract were incubated in such buffers for h on ice, and the remaining enzyme activity was determined Inset: EhPFOR time stability in N2-saturated buffer in the absence or presence ... present during the incubation (data not shown) As Cat only partially prevented enzyme inactivation, EhPFOR inactivation by H2O2 was examined in detail The enzyme was strongly inhibited in a dose-dependent...

Ngày tải lên: 15/03/2014, 23:20

... higher in VLCAD KO mice than in WT mice Fasting induced a significant increase in both genotypes; however, this was more evident in the VLCAD KO mice (Fig 3A) Interestingly, the MCT diet also induced ... observed in human VLCADD [5] In fact, in both mice and humans, clinical symptoms become mainly evident as a consequence of triggers such as fasting, resulting in the accumulation of long-chain acylcarnitines, ... 70.95 ± 4.4 UÆmg)1 in WT mice and 91.55 ± 8.5 UÆmg)1 in VLCAD KO mice in the nonfasted state Interestingly, the MCT diet combined with fasting significantly reduced GPX activity in WT mice, from...

Ngày tải lên: 15/03/2014, 23:20

... sentence stress in enhancing English speaking competence 34 8.1 Final intonation 36 8.1.1 Rising-falling intonation 36 8.1.2 Rising intonation 37 8.2 Non-final intonation ... that is, in combination with other words forming phrase and sentences Before finding out information about sentence stress patterns, we have to find out what stress is In linguistics, stress is ... and joined together 26 The pattern of stress in this sentence is stressed – unstressed – stressed – unstressed – stressed – unstressed, with equal number of alternating stressed and unstressed...

Ngày tải lên: 17/03/2014, 16:12