نتایج جستجو برای: apparent viscosity

تعداد نتایج: 143549  

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه پلیمر و پتروشیمی ایران - پژوهشکده پتروشیمی 1389

this is an original study on the effect of a polyisobutylene – polydimethylsiloxane (pibpdms) block copolymer modifier used as an interfacial active agent on the dynamics behaviour of single newtonian drops suspended in a polyisobutylene (pib) newtonian matrix. the results were divided in two sections. the first part included the experiments carried out on the non-modified and 2% block cop...

Faranak Naimian Nassrin Sheikh Rouhallah Bagheri

Acrylamide was grafted in low density polyethylene during melt processing in the presence of a free radical initiator using a torque rheometer in a closed system. Effects of processing time, acrylamide and benzoyl peroxide concentrations were studied. FTIR studies revealed that the degree of grafting increased by an increase in acrylamide concentration. Maximum grafting was obtained at 7 mi...

This study investigates the effect of functionalized Multi-Walled Carbon NanoTube (f-MWCNT) on rheological properties of water-based drilling muds. Functionalization of multi-walled carbon nanotube was performed by introducing a hydrophilic functional group onto the surface of nanotubes via acid treatment. In order to guarantee the results, X-ray fluorescence, transmission...

Journal: :journal of agricultural science and technology 2012
s. yeganehzad m. mazaheri tehrani m. mohebbi m. b. habibi najafi z. baratian

rheological properties of chocolate are important in manufacturing process for obtaining high-quality products with well-defined texture and are directly influenced by composition and their refining time. soy protein benefits from nutritional and functional properties to be used in different foods. effects of different replacement levels of skim milk powder by soy flour, (from 0 to 100%) and ba...

Journal: :Chemical Engineering Science 2022

Foam viscosity is a key property to predict the foam flow in narrow channels and porous media. In this study, we investigated effects of quality temperature on dynamic how modifying composition colloidal system can alter rheology. It was shown that addition nanoparticles polymer improve stability at high-temperature conditions increase apparent viscosity. The results confirmed be predicted usin...

Journal: :پژوهش های علوم و صنایع غذایی ایران 0
sepideh amirabadi arash koocheki mohabbat mohebbi

in this research, different concentrations of xanthan and lepidium perfoliatum seed gums (0.1, 0.2 and 0.3%) were used to improve the quality and shelf-life of chiffon cake. for this purpose, specific gravity and apparent viscosity of batter, and the volume, specific volume, moisture, sensory and texture properties, crumb and crust color were examined. to investigate the effect of gums on the s...

Journal: :FASEB journal : official publication of the Federation of American Societies for Experimental Biology 2011
Anna Á Rauscher Zoltán Simon Gergely J Szöllosi László Gráf Imre Derényi Andras Malnasi-Csizmadia

Our aim was to elucidate the physical background of internal friction of enzyme reactions by investigating the temperature dependence of internal viscosity. By rapid transient kinetic methods, we directly measured the rate constant of trypsin 4 activation, which is an interdomain conformational rearrangement, as a function of temperature and solvent viscosity. We found that the apparent interna...

2010
A. F. Farrag A. Shendy

Concentrated solutions of whey proteins (WPC) were prepared from sweet whey by ultrafiltration technique, and stored at – 18°C up to three months. Denaturation degree and viscosity of WPC solutions were assessed. Denaturation degree of whey protein solutions increased significantly (P<0.05) as affected by duration of frozen storage and protein content. The highest degree of denaturation was fou...

2013
Frank A. W. Coumans Guus van Dalum Markus Beck Leon W. M. M. Terstappen

Filtration can achieve circulating tumor cell (CTC) enrichment from blood. Key parameters such as flow-rate, applied pressure, and fixation, vary largely between assays and their influence is not well understood. Here, we used a filtration system, to monitor these parameters and determine their relationships. Whole blood, or its components, with and without spiked tumor cells were filtered thro...

Journal: :Journal of colloid and interface science 2000
Horn Richtering Bergenholtz Willenbacher Wagner

Hydrodynamic and colloidal interactions are explored in concentrated, charge-stabilized colloidal dispersions by measuring the dependence of rheology (e.g., low and high-shear viscosity, high-frequency viscosity, and modulus) and self-diffusivity on salt content, particle size, and concentration. Model, sulfonated polystyrene lactices of varying diameter are prepared and investigated by shear r...

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