compressibility characteristics of fine-grained soils are often the most important parameters for settlement evaluation of the founded layers. the compression index which is the slope of virgin curve is usually for determination of settlement potential of fine grained soils. in this research, the effects of different physical and index properties of soil samples were investigated on compression...

abstract different definitions have been proposed for soil quality. various soil properties have been suggetsted as soil quality indices by researchers. this research was conducted to study the relationship between slope of retention curve at its inflection point (s index) and other soil physical quality indices, because the reserches between s index and soil physical properties are little. thi...

the growing interest in using natural fibers as reinforcing agents of polymer-based composites is mainly due to their advantages such as lower cost, lower density, ease of preparation, lower energy requirements for processing, biodegradability, wide availability and relative non-abrasiveness over traditional reinforcing fibers such as glass and carbon. in this study, wood-plastic composite (wpc...

ion, this displacement is accomodated in the DPI molecule by a corresponding movement of the imidazole ring. As mentioned above, the two phenylalanine residues B24 and B25 are important for the biological activity of insulin. Fig. 9 shows the change in conformation of these two residues in DPI compared with insulin (molecule I). We can see that a large change in conformation occurs at B25, whil...

The Wiener index of a graph G is equal to the sum of distances between all pairs of vertices of G, It is known that the Wiener index of a molecular graph correlates with certain physical and chemical properties of a molecule. In the mathematical literature, many good algorithms can be found to eompute the distances m a graph, and these can easily be adapted for the caleulation of the Wiener ind...

Physico-chemical properties, such as the boiling point, molar refraction, critical pressure, viscosity, chromatographic retention, etc. are rather simple experimental available properties of chemical compounds. They are tabulated and may be used e.g., in projecting industrial instalations. Sometimes, it happends that a given compound is toxic, or dangereus or simply not available. In such condi...

The Wiener index of a graph is the sum of the distances between all pairs of vertices. In fact, many mathematicians have study the property of the sum of the distances for many years. Then later, we found that these problems have a pivotal position in studying physical properties and chemical properties of chemical molecules and many other fields. Fruitful results have been achieved on the Wien...

Background and objectives: The protective function of saliva against dental caries achieved through its physico-chemical properties The purpose of this comparative study was to evaluate the relationship between some risk factors such as salivary flow rate, pH, oral hygiene (plaque index), buffering capacity, salivary level of lacto bacilli, streptococcus mutans and candida, with dental caries a...