Zooplankton in Lake Sevan during the period of high water level and low fish density

It is shown that, upon the flooding of ephemeral waterbodies in the coastal region and the formation of new warmer sites of the shoals due to the rising water level in Lake Sevan in 2011, species typical for temporary waterbodies and various shoals have been recorded in the zooplankton. Among them, Daphnia (Ctenodaphnia) magna Straus reached mass development, which was favored by the minimal control from “the top” and favorable trophic conditions. Owing to the abovementioned factors, the total lake zooplankton biomass and water transparency increased. The uneven distribution of D. (C.) magna was determined by the density of fish that prefer it as food.     

Dynamics of transfer of charge carriers in DNA molecule

An equivalent electrical circuit of DNA molecule is suggested and used to model the charge transfer dynamics in the molecule. Its switching time is shown to be in the femtosecond time range and to depend on the frequency of input electric signal. Raising the input signal frequency from 1 GHz to 4 THz and lowering the temperature decrease the current through DNA. The switching rate of DNA molecule is determined by the processes of delocalization and localization of holes, which is achieved by variation in the base sequence and length.     

Properties of human serum albumin in ischemic heart disease

Conformational changes in blood serum albumin under heart ischemia are found from the dispersion parameters of optical rotation and circular dichroism. It is also found that patients with myocardium infarction have a considerable amount of carbohydrate components in the modified albumin form.