the effect of different solvent systems on the extraction of antioxidant and anti radical agents of grape seed was studied. for this purpose 6 different solvent systems with similar polarity and different selectivity were used to prepare grape seed extract. extraction efficiency, reducing activity, radical scavenging property and the effect of each extract on the increase of thermal resistance ...

Let A1, . . . , An be central simple algebras over a field F . Suppose that we possess an information on the Schur indexes of some tensor products of (some tensor powers of) the algebras. What can be said (in general) about possible degrees of finite field extensions of F splitting the algebras? In Part I, we prove a positive result of that kind. In Part II, we prove a negative result. In Part ...

Organizing massive amount of information on communication channels is a new challenge to the data management and telecommunication communities. In this paper, we consider wireless data broadcasting as a way of disseminating information to a massive number of battery powered palmtops. We show that di erent physical requirements of the wireless digital medium make the problem of organizing wirele...