نتایج جستجو برای: viscosity ratio

تعداد نتایج: 533263  

2016
Shreesh Ojha

Results: Results demonstrated that OC treatment or nicotine exposure led to increased hemorheological (blood viscosity, hematocrit and plasma viscosity), prothrombotic (plasminogen activator inhibitor-1), proinfl ammatory (Creactive protein, uric acid, neutrophil/lymphocyte ratio and platelet/lymphocyte ratio) and anti-infl ammatory (corticosterone) markers. However, these effects except that o...

Journal: :Dental materials journal 2004
Yukinori Maruo Masao Irie Goro Nishigawa Morihiko Oka Shogo Minagi Kazuomi Suzuki

This study aims to investigate the preferred viscosity of irreversible hydrocolloid used in the preliminary impression for edentulism. Thirteen modalities of irreversible hydrocolloid were prepared by changing the W/P ratio. Discrimination test for the preferred viscosity was performed on 11 prosthodontists (10.4+/-5.3 years of prosthetic experience). The parameter of discrimination test (P%) w...

2015
Howard H. Hu Thomas S. Lundgren Daniel D. Joseph

It is known that the stability problem for core-annular flow of very viscous crude oil and water is singular, the water annulus appears to be inviscid with boundary layers at the pipe wall and at the interface. In the present paper, this singular problem is treated by the method of matched asymptotic expansions using ∈ = m/Rα as a small parameter. There are two cases of instability correspondin...

Journal: :Journal of the American Chemical Society 2006
Mark A Haidekker Thomas P Brady Darcy Lichlyter Emmanuel A Theodorakis

The development of a dual probe that provides ratiometric measurements of fluid viscosity is described. The design is based on coupling of a primary fluorophore with viscosity-independent fluorescence emission (blue unit) with a secondary fluorophore that exhibits viscosity-sensitive fluorescent emission quantum yield (red unit). Excitation of the secondary fluorophore can be achieved via Reson...

Journal: :علوم و تکنولوژی پلیمر 0
سید حسن جعفری حسین علی خنکدار مرتضی احسانی احمد اسدی نژاد

to describe the rheological behavior of polymer blends using emulsionbased (palierne theory) as well as micromechanical models (coranapproach), two immiscible polymeric blend systems of poly(trimethylene terephthalate) (ptt)/polyamide-12 (pa12) and ptt/polyethylene (pe) having different levels of molecular interactions were investigated as model systems. the role of interfacial interactions, vi...

2009
Eva GREGOROVÁ Willi PABST

The influence of particle shape (aspect ratio) on the intrinsic viscosity is investigated, taking three Czech kaolin products (floated kaolins) as paradigmatic examples. An average aspect ratio is obtained for each kaolin from a comparison of particle size measurements using sedimentation and laser diffraction. The intrinsic viscosity is obtained by a multistep procedure: firstly, flow curves a...

Journal: :Lab on a chip 2014
Shaohua Ma Joseph M Sherwood Wilhelm T S Huck Stavroula Balabani

The flow topology in moving microdroplets has a significant impact on the behaviour of encapsulated objects and hence on applications of the technology. This study reports on a systematic investigation of the flow field inside droplets moving in a rectangular microchannel, by means of micro-particle image velocimetry (μPIV). Various water/oil (w/o) fluid mixtures were studied in order to elucid...

Journal: :Physical review letters 2013
Kevin Dusling Thomas Schäfer

The dilute Fermi gas at unitarity is scale invariant and its bulk viscosity vanishes. We compute, in the high temperature limit, the leading contribution to the bulk viscosity when the scattering length is not infinite. A measure of scale breaking is provided by the ratio (P-2πħ/3ε)/P, where P is the pressure and E is the energy density. At high temperature this ratio scales as zλ/a, where z is...

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