published in Aduance ACS Abstracts, February 15, 1994. 0095-233819411634-0421$04.50/0 Fueled by the intense activity in fullerene chemistry and intrinsically interesting geometrical and topological features of fullerenes, several studies have focused on the fascinating mathematical properties of fullerenes. These studies included graph theoretical computations of the characteristic polynomials,...

In this paper, the damage evolution characteristics of C50 concrete under impact load were studied, based on electro-mechanical impedance (EMI) technique. A parallel test was conducted internal relationship between EMI technology and a resonant frequency to verify sensitivity accuracy technology. addition, another mechanical specimens with different levels establish empirical degree properties ...

Sheep and cow butter oils have high consumption trade rate in the market, but standards regarding type differentiation are lacking. Therefore, objective of this study was to assess distinction main molecular components sheep oils. Sanjabi Holstein butters were produced from milk collected two seasons summer autumn via conventional local method. The including fatty acids, triacylglycerols, stero...

Nonlinearities in the drift and diffusion coefficients influence temporal dependence in scalar diffusion models. We study this link using two notions of temporal dependence: β − mixing and ρ − mixing. We show that β − mixing and ρ − mixing with exponential decay are essentially equivalent concepts for scalar diffusions. For stationary diffusions that fail to be ρ−mixing, we show that they are s...

Freezing-thawing resistance is a very significant characteristic for concrete in severe environment (such as cold region with the lowest temperature below 0°C). In this study, ordinary-air-entrained (O-A-E) concrete was produced in a laboratory environment; the compressive strength, cubic compressive strength of C50, C40, C30, C25, and C20 ordinary-air-entrained concrete, tensile strength, and ...

A recent development in energy and environment decomposition analysis is the application of the technique to cross-country region comparisons. Cross-country region decomposition gives rise to several problems that do not normally occur in chronological decomposition of changes in a specific country. These include large variations in explanatory factors in the data, the measure of economic outpu...