نتایج جستجو برای: Viscoelastic Rheological Properties

تعداد نتایج: 882614  

Journal: :iranian journal of pharmaceutical research 0
s honary m golkar

film coating solutions containing different grades of hpmc (e5, e15 and e50) with and without polyethylene glycol (with various molecular weights) were examined by an oscillatory method, using haake cv 100 rheometer. fundamental rheological parameters (?, g? and g² ) were measured over the frequency range from 0.04 to 2 hz. the variation with frequency of the loss tangent (a ratio of viscous to...

Journal: :journal of petroleum science and technology 0
bader h. albusairi kuwait university adam al-mulla kuwait university

the rheological properties of four different kuwaiti crude oils in the presence of polyacrylamide (paa) were investigated. paa was varied at three different concentrations of 25, 50, and 75 ppm to study the viscoelastic properties in the untreated samples. four different temperatures (25, 30, 35, and 40 °c) were used to evaluate different viscoelastic parameters of the treated and untreated kuw...

2017
Bastian Rouven Brückner Helen Nöding Andreas Janshoff

The local mechanical properties of cells are frequently probed by force indentation experiments carried out with an atomic force microscope. Application of common contact models provides a single parameter, the Young's modulus, to describe the elastic properties of cells. The viscoelastic response of cells, however, is generally measured in separate microrheological experiments that provide com...

Journal: :Acta obstetricia et gynecologica Scandinavica 2014
Sara K Bastholm Naja Becher Peter R Stubbe Ioannis S Chronakis Niels Uldbjerg

OBJECTIVE To characterize the viscoelastic properties of cervical mucus plugs(CMPs) shed during labor at term. DESIGN Experimental research. SETTING Department of Obstetrics and Gynecology, Aarhus University Hospital, Denmark. POPULATION/SAMPLE Spontaneously shed CMPs from 18 healthy women in active labor. METHODS Viscoelastic properties of CMPs were investigated with a dynamic oscillat...

The rheological properties of four different Kuwaiti crude oils in the presence of polyacrylamide (PAA) were investigated. PAA was varied at three different concentrations of 25, 50, and 75 ppm to study the viscoelastic properties in the untreated samples. Four different temperatures (25, 30, 35, and 40 °C) were used to evaluate different viscoelastic parameters of the treated and untreated Kuw...

Journal: :مهندسی بیوسیستم ایران 0
اکبر زمانی کارشناس ارشد گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه تبریز هادی الماسی استادیار گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه ارومیه بابک قنبرزاده دانشیار گروه علوم و صنایع غذایی دانشکدۀ کشاورزی دانشگاه تبریز

in this study, wasinvestigated the effect of two thickening agents, carboxymethyl cellulose (cmc) and guar on the rheological properties of set fruit yogurt. viscoelastic modulus (g' , g'), apparent viscosity and complex viscosity increased and loss factor decreased by increasing carboxymethyl cellulose and guar content up to 0.2% and 0.06% respectively. however, in the concentrations...

2008
Dana Grecov

Nematic liquid crystals are textured, anisotropic, viscoelastic materials. The remarkable rheological properties of viscoelastic materials are governed by the flow-induced evolution of molecular configuration. Analogues to liquid crystal flow processes occur in the supramolecular selfassembly processes of living biological tissues. A good understanding of the relationships between rheological p...

Journal: :Journal of oleo science 2010
Suraj Chandra Sharma Kenichi Sakai Hideki Sakai Masahiko Abe

We have studied the rheological properties of mixtures of polyoxyethylene (10 mol) phytosterol (PhyEO(10)) and polyoxyethylene (10 mol) cholesterol (ChEO(10)) mixed in different ratios along with tetraethylene glycol monododecyl ether (C(12)EO(4)) surfactants in water. Addition of C(12)EO(4) to the aqueous solution of a mixture of (PhyEO(10) + ChEO(10)) results in one-dimensional micellar growt...

Journal: :journal of food biosciences and technology 2015
m mizani m. yaghoti moghaddam m. alimi m. salehifar

emulsion stability, viscoelastic rheological properties and particle size distribution of french dressing samples formulated with two types of commercial modified starch have been investigated. the product’s usual thickening agents, xanthan and guar gum, were 100% substituted by (2, 2.2%) of acetylated distarch adipate (ada) and hydroxypropylated distarch phosphate (hdp) from waxy maize starch....

2008
Ahran Pae

The purpose of this study was to compare rheological properties of six dental interocclusal recording materials and to investigate the effect of temperature on the rheological properties during setting. Five polyvinylsiloxane materials and one polyether material were investigated in this study. The strorage modulus (G') and the loss factor (tanδ) were measured from 30s after mixing during setti...

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