kalchoye copper-gold deposit is located about 110 kilometers east of esfahan province and within the eocene volcano sedimentary rocks. sandy tuff and andesite lava are important members of this complex.the form of mineralization in area is vein and veinlet and quartz as the main gangue phase. the main ore minerals are chalcopyrite, chalcocite, galena and weathered minerals such as goethite, iro...

Some physical, chemical and biological properties of raw water collected from Caroni River in Central Trinidad and raw wastewater from Angostura Distillery in North Trinidad were measured in the laboratory. In addition, the properties of the water effluent obtained by passing the raw Caroni River water through various sand-clay filter media that differed in the proportions of sand and clay by v...

Background: Bacterial Extracellular Polymeric Substances (EPS) are environmental friendly and versatile polymeric materials that are used in a wide range of industries such as: food, textile, cosmetics, and pharmaceuticals. To make the production process of the EPS cost-effective, improvements in the production yield is required which could be implemented through application of processes such a...

Factors controlling closure in the biotite Rb-Sr system were investigated in a detailed study of an amphibolite-facies metacarbonate from the central Swiss Alps. Oxygen isotope data suggest that the rock cooled as a closed system. Calcite-dolomite thermometry temperatures of ;450°C to 500°C and feldspar thermometry temperatures of ;300°C to 400°C provide evidence of extensive Ca-Mg and Na-K exc...

The effect of K-deficiency on the putrescine biosynthetic enzyme, arginine decarboxylase (ADC), was investigated by growing oat (Avena sativa L. var Victory) plants on a low-K, but otherwise complete nutrient medium in washed quartz sand for up to 18 days. Enzyme activity rose as the concentration of KCl was dropped to 0.6 millimolar or below. However, growth was not inhibited significantly at ...

This appendix describes the procedure developed by Clough and Duncan (1971) for the determination of hyperbolic parameter values for interfaces. Hyperbolic parameter values of the interfaces between concrete and dense Density Sand, medium-dense Density Sand, and dense Light Castle Sand are determined based on the results of the initial loading tests presented in Appendix C. Example calculations...

Isotropic compression tests were conducted on a series of gap-graded mixtures carbonate sand (CS) from the South China Sea and fine crushed quartz silt. The purpose these is to expl...

Little is known of the properties sarsen stones (or silcretes) that comprise main architecture Stonehenge. The only studies rock struck from monument date 19 th century, while 20 century investigations have focussed on excavated debris without demonstrating a link to specific megaliths. Here, we present first comprehensive analysis samples taken directly Stonehenge megalith (Stone 58, in centra...

this study was designed to examine the effects of retinoic acid adding to cumulus and/or fibroblast cellsmonolayer on the development of mouse early embryos. one-cell mouse embryos were obtained from nmrimice after superovulation by an intraperitoneal injection of 5 iu equine chorionic gonadotrophin (ecg)followed 48 hrs later by 5 iu human chorionic gonadotrophin (hcg). mouse embryonic fibrobla...

We investigate the effect of moisture on the dielectric permittivity and surface roughness with backscatter response from four different barefaced terrain. They represent four classes in the Wentworth grain size classification scale. We improve on previous technique used to remotely identify oil sand reservoirs through accurate modeling of the terrain electromagnetic (EM) reflectivity. First we...