Survey of alpine vegetation near the forest line in the Ertash Valley of the Sarychat -Ertash State Reserve in the northern Tian Shan Mountains, Kyrgyz Republic

As a part of an ecological research project on wild animals in the Sarychat-Ertash State Reserve, we surveyed the alpine vegetation near the forest line (at an elevation from ca.3,000 to 3,200 m)in the Ertash Valley of the northern Tian Shan mountains of the Kyrgyz Republic. Horses and sheep are kept as livestock in the area and Marco-Polo sheep (argali) and wolves inhabit the region, but information on wildlife, weather conditions and inhabitants’ livelihood is hard to obtain. In May 2011, we established 5 transverse transects across a river to describe a cross-sectional view of the vegetation. As a result, the 8 woody species identified belonged to 6 families and all exhibited shrubby forms. Shrubby cinquefoil (Potentilla fruticosa) was distributed throughout the survey area, and thorny Caragana jubata was interspersed locally. The number of woody species increased significantly at higher elevations. We discuss the reason for the unexpected increase in number of species with increasing elevation.Article信州大学農学部AFC報告 10: 145-151(2012)departmental bulletin pape

Using quartzofeldspathic waste to obtain foamed glass material

The present paper proposes a method for the processing of mine refuse non-ferrous metal ore in the production of foamed glass. The subject of this research is a low-temperature frit synthesis (<900 °C), allowing for the high-temperature glass melting process to be avoided. The technology for the production of frit without complete melting of the batch and without using glass-making units offers a considerable reduction in energy consumption and air pollution. It was found that material samples obtained with a density of up to 250 kg/m3 are of rigidity (up to 1.7 MPa) in comparison with the conventional foamed glass (1 MPa). This increased rigidity was due to the presence of crystalline phase particles in its interpore partition of less than 2 µm in size. Material with a density of 300 kg/cm3 is recommended for thermal insulation for the industrial and construction sectors. At densities above 300 kg/cm3 and a strength of 2.5 MPa, the purpose becomes heat-insulating construction material. The proposed method for obtaining a porous material from waste widens our choice of raw materials for foamed glass, whilst saving resources and energy

Single-stage technogy for granulated foam glass production based on the composition of tripoli and technogical microsilica

The possibility of foam glass production by means of one-stage technology based on the natural tripoli and technogenic silica is determined. 45 % sodium hydroxide solution is used for the synthesis of foam glass. The addition of microsilica as an extra component in an amount of 10 to 50 wt. % in batch component increases the strength of the obtained material to 4 MPa and reduces foaming temperature from 870 to 830 °C. The increased mechanical strength of the material is due to the residual quartz dissolution and cristobalite crystallization. The samples obtained from batch with 30 wt. % microsilica have maximum strength

Influence of synthesis conditions on the crystallinity of hydroxyapatite obtained by chemical deposition

The hydroxyapatite synthesis on a variety of substrates under various conditions was studied. It was shown that the increase in the temperature of the reaction medium increases the amount of nanocrystalline phase with an average crystallite size of 25 nm. Studies revealed that in addition to the pure hydroxyapatite, [beta]-Ca[3](PO[4])[2] along with calcium carbonates and carbonate-substituted hydroxyapatites were formed. A significant increase in phase crystallinity during the heating of reactants up to the reaction temperature was shown