in this study a simple and general chemical association theory is introduced. the concept of infinite equilibrium model is re-examined and true mole fractions of associated species are calculated. the theory is applied to derive the distribution function of associated species. as a severe test the application of presented theory to the van der waals mixture model is introduced in order to perfo...

This study focused on hepatosomatic and gonadosomatic index and levels of plasma 17β-estradiol (E2), vitellogenin (Vtg) and total protein and determined the localization of Vtg in the liver during vitellogenesis in female Chalcalburnus tarichi, an endemic cyprinid species living in the Lake Van, Turkey. The levels of plasma E2, Vtg and total protein in female fish increased during vitellogenesi...

G reen algae, in surface layers of almost every lake or stream, are some of the most common aquatic creatures. However, unbeknownst to researchers until recently, viruses that infect algae are almost as widespread. Entire ecosystems of algal hosts and their corresponding viruses lay hidden until the 1980s, when James L. Van Etten, a professor of plant pathology at the University of Nebraska (Li...

The study area is located in the Eastern Anatolian Plateau found Alpine-Himalayan fold mountain belt. Engil River Upper Basin (Güzelsu) within Lake Van Closed Basin, largest soda lake this belt terms of volume and area. This aims to investigate geomorphologic evolution Güzelsu support development with morphometric analysis. With aim, a Digital Elevation Model (DEM) was created aim quantifying e...

Objective: A total of 24 sediment samples were taken from the rivers flowing into Van Lake and their growth rates examined in three different media. In our study, we aimed to investigate which Streptomyces (medi-cally important) bacteria reproduce more medium.
 Material Method: a pouring Lake. Then moisture pH determined. isolated pure cultures obtained. During isolation process, me-dia, M...

Diel pH changes in lake waters resulting from high photosynthetic activity may regulate water-soluble P concentration (WSP) and P sorption by suspended sediments in shallow eutrophic lakes. Laboratory studies were conducted to determine the pH effect on P fractions and P sorption kinetics in oxidized sediment suspensions from two subtropical lakes (Lake Apopka and Lake Okeechobee, Florida). The...