نتایج جستجو برای: group contribution
تعداد نتایج: 1181254 فیلتر نتایج به سال:
MOTIVATION Group contribution methods are frequently used for estimating physical properties of compounds from their molecular structures. An algorithm for estimating Gibbs energies of formation through group contribution methods has been automated in an object-oriented framework. The algorithm decomposes compound structures according to a basis set of groups. It permits the use of wildcards an...
attempts have been made to study the thermodynamic behavior of 1,3 butadiene purification columns with the aim of retrofitting those columns to more energy efficient separation schemes. 1,3 butadiene is purified in two columns in series through being separated from methyl acetylene and 1,2 butadiene in the first and second column respectively. comparisons have been made among different therm...
this research was conducted to examine the effect of a concurrent training on rest level of leptin of plasma and some hormonal factors in non-athlete subjects. the research population included non-athlete men who didn’t participate in any organized sport activities. 30 men were chosen voluntarily among the above-mentioned population and were divided into 2 groups: experimental (15 subjects) an...
The previously developed dispersion activity coefficient model (ACM) is extended from a molecular to group contribution (GC) providing results of equal accuracy as the model. Contrary other GC-ACMs presented GC-ACM preserves topology information each molecule in mixture. Therefore, contrast DISQUAC, UNIFAC or COSMOSAC, where eliminated by assignment groups construction sigma-profiles, this new ...
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