The Hansen solubility parameters (HSP) are frequently used for solvent selection and characterization of polymers, directly related to the suspension behavior pigments in mixtures. performance currently available group contribution (GC) methods HSP were evaluated found be insufficient computer-aided product design (CAPD) paints coatings. A revised and, this purpose, improved GC method is presen...

Contribution of Stroke to the Cochrane Stroke Group Trials Register To the Editor: The formulation of evidence-based stroke care practice guidelines is guided by the results of randomized trials. We sought to determine what proportion of all trial reports are published in Stroke, and what proportion might be missed by electronic search methods. One of us (B.T.) performed a page-by-page search o...

Coordinated variations in brain morphology (e.g., cortical thickness) across individuals have been widely used to infer large-scale population brain networks. These structural correlation networks (SCNs) have been shown to reflect synchronized maturational changes in connected brain regions. Further, evidence suggests that SCNs, to some extent, reflect both anatomical and functional connectivit...

Based on experimental viscosity data collected from the literature and using density data obtained from a predictive method previously roposed by the authors, a group contribution method is proposed to estimate viscosity of imidazolium-, pyridinium-, and pyrrolidiniumased ILs containing hexafluorophosphate (PF6), tetrafluoroborate (BF4), bis(trifluoromethanesulfonyl) amide (Tf2N), chloride (Cl)...

This work presents an attempt to develop a group contribution based model for toxicological quantities. For example, LC50, LD50 and acute exposure guideline levels (AEGL). The first two quantities are modelled based on linear estimation of group contributions using measured data from the literature. Group contributions are also developed for, i. AEGL data published by the U.S. National Research...

this study is done to define the technological contribution in the value chain of chemical industries and assess the effects of this on industrial’s value added. the value network contains 581 active firms in 5 stages and 21 groups, and date gathered with 141 questionnaires by snowball method. then the technology contribution and economic value added are defined for each stage and group. beside...

A new method for the estimation of properties of pure organic compounds is presented. Estimation is performed at three levels. The primary level uses contributions from simple groups that allow describing a wide variety of organic compounds while the higher levels involves polyfunctional and structural groups that provide more information about molecular fragments whose description through firs...