In the process of sustainable development regions, negative consequences arise in form (1) depletion natural and energy resources, (2) reduction biological diversity, (3) violation stability ecosystems, (4) pollution environmental objects, including atmospheric air. The constant prolonged chronic aerogenic impact aromatic hydrocarbons on human body can make a significant contribution to formati...

Increasing concentrations of ions flowing through the xylem of plants produce rapid, substantial, and reversible decreases in hydraulic resistance. Changes in hydraulic resistance in response to solution ion concentration, pH, and nonpolar solvents are consistent with this process being mediated by hydrogels. The effect is localized to intervessel bordered pits, suggesting that microchannels in...

Two methods for separation of polymeric galactoglucomannans (GGMs) from a hot-water extract of spruce wood, i.e., membrane filtration and precipitation in ethanol-water, were compared. Filtration through a series of membranes with different pore sizes separated GGMs of different molar masses, from polymers to oligomers. Only polysaccharides were precipitated in ethanol-water. With the optimal w...

The chemical changes that occur in the various stages of tea manufacture were. until recently, imperfectly known. Research in this direction would help not only in improving the existing methods of manufacture, but also in the solution of any ... fresh problems as they arise. In order to render the present manufacturing practices scientific rather than empirical, a thorough knowledge of the che...