Background & objectives: Polyethylene terephthalate (PET) containers have many applications in the food industry. Although there are numerous advantages for PET it also has some disadvantages, one of which is the migration of materials from the container into the material inside. In this study, the effect of two factors of storage time and temperature on the migration rate was evaluated and mod...

The paper provides an extended local gauge transformation. By means of it, the Lagrangian of gauge fields with masses can keep unchanged in the continuous transformations. In this way, the Higgs mechanism becomes unnecessary and we do not need to suppose the existence of the Higgs particles. PACS numbers: 1110, 1130 According to the Yang-Mills theory, in order to keep the Lagrangian of a system...

the potassium pools of five major physiographic units of urmia region in western azarbaijan province were studied to investigate the distribution of k forms as a function of clay mineralogy and physiographic units. for this, soil samples from different horizons of ten pedons were selected and analyzed for physiochemical properties, mineralogy of clay fraction, and forms of k. analyses of xrd re...

Let A = (an;k)n;k1 and B = (bn;k)n;k1 be two non-negative ma-trices. Denote by Lv;p;q;B(A), the supremum of those L, satisfying the followinginequality:k Ax kv;B(q) L k x kv;B(p);where x 0 and x 2 lp(v;B) and also v = (vn)1n=1 is an increasing, non-negativesequence of real numbers. In this paper, we obtain a Hardy-type formula forLv;p;q;B(H), where H is the Hausdor matrix and 0 < q p 1. Also...

After the publication of the preceding paper (1), I found a mistake in eq. (2) and another in deriving eq. (3) from (2), to my great sorrow. The eq. (2) as an approximate expression of Px should have been (1) The basic idea was dPx=-x/k' adx, in other words, that the potential contributed to the point X (the point y=0, fig.1 of the preceding paper) by a small active region dx at x, is proportio...