Several exponential-time differencing (ETD) schemes are introduced into the method of dissipative particle dynamics (DPD) to solve the resulting stiff stochastic differential equations in the limit of small mass, where emphasis is placed on the handling of the fluctuating terms (i.e., those involving the random forces). Their performances are investigated numerically in some test viscometric fl...

The hydrodynamic behavior of high-methoxy (HM) and low-methoxy (LM) pectin solutions was examined by capillary viscometric analysis. The LM-pectin was produced from the HM-pectin by PME-deesterification. As a result of the viscometric analysis, the PMEdeesterified LM-pectin showed quite different solution behavior from the HM-pectin. The LM-pectin had larger intrinsic viscosity ([h]) than HM-pe...

A viscometer suitable for rapid measurements in small volumes of highly viscous liquids is described. Using this device the viscometric affinity assay for glucose was studied under variable conditions in order to obtain basic information for the design of a viscometric glucose sensor. The viscosity of the dextran/Concanavalin A (ConA) solution is sensitive to glucose in a broad range of the she...

The binding of proflavine to native DNA increased its stability against thermal denaturation as measured by viscometric method. Up to a moderate ionic strength of 0.058 m , the melting temperature of the complex increased almost linearly with the increase of dye concentrations and a saturation was reached when one proflavine molecule was added per four to five DNA-Phosphates {DIP c^0 .2 ). The ...

STEFANIA RACOVITA1, SILVIA VASILIU1, CEZAR DORU RADU2, LENUTA PROFIRE3, LAURA CHECHERITA3*, LILIANA FOIA3 1”Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Vodã Alley, 700487, Iaoi, Romania 2 ”Gh. Asachi” Technical University, Faculty of Textiles-Leather and Industrial Management, 29 Mangeron Bd., 700500 Iasi, Romania 3”Gr.T.Popa” University of Medicine and Pharmacy, Facult...

In this study, polyvinyl chloride (PVC) and polystyrene (PS) polymers, which do not form a compatible blend with each other in certain concentration ranges are widely used on an industrial scale, were used. The range these two polymers determined viscometrically, maleic anhydride-styrene (MAS) copolymer was added as compatibilizing agent range. the polymer pair did 1.5 2.0 g dL-1. range, 5.0 10...