The correlations between the physico-chemical properties of a chemical structure and its molecular structure-properties are used in quantitative structure-activity property relationship studies (QSAR/QSPR) by using graph-theoretical analysis techniques. It is well known that some structure-property studies, eccentric distance sum, better than corresponding values obtained Wiener index. In this ...

the study comparatively assessed the impacts of farm activities on the abundance and diversity of soil arthropods and soil physico-chemical parameters of the practical year training programme (pytp) farmlands, university of ibadan, south western nigeria. soil arthropods were collected from september, 2010 to february, 2011 in five sampling sites of pytp farmlands using berlese tullgren extracti...

the oil extracted from three major canola cultivars (hyolla401, hyolla420 and rgs003) grown in golestan province was analyzed for physico-chemical properties, fatty acid composition, minerals content, and stability during 16 weeks of storage. according to the results, the highest iodine value and refractive index belonged to hyolla401. the highest saponification value was observed in hyolla420....

in this study, micromorphological properties of some samples collected from pedons polluted with petroleum refinery wastes and some adjacent unpolluted pedons were studied. after description of the studied pedons, disturbed and undisturbed samples were collected for physicochemical and micromorphological analyses. the results showed that the physicochemical properties (i.e. structure, bulk dens...

present communication deals with the study of four village fish culture ponds (two wild and two managed ponds) from district hisar of haryana, india was undertaken, to correlate the water quality and biological cycles in ponds with fish production. studies have revealed that the ponds are in good trophic status. chlorides, total hardness, calcium, magnesium, biochemical oxygen demand (bod), pho...

Flux formulations are specified to target chemical and physico-chemical parameters. Chemical parameters set flux element transfer behaviours weld metal oxygen contents. Physico-chemical such as slag viscosity, surface tension melting range targeted ensure an acceptable bead profile appearance. Slag detachability is important property required high welding productivity, smooth no entrapment. Her...