نتایج جستجو برای: octanolwater partition coefficient
تعداد نتایج: 203875 فیلتر نتایج به سال:
Data clustering method is a process of putting similar data into groups. A clustering method partitions a data set into several groups such that the similarity within a group is larger than among groups. It has been playing an important role in solving many problems in image processing and pattern recognition. In this paper, a new method called hybrid clustering method is obtained by the most r...
A genetic algorithm was developed and assessed in order to select pairs of proper structural descriptors able to estimate and predict octanol-water partition coefficients of polychlorinated biphenyls (PCBs). The molecular descriptors family was calculated for a sample of 206 PCBs. The problem of searching for the proper descriptors in order to identify structure-activity relationships was trans...
Aminoamide local anesthetics induce vasoconstriction in vivo and in vitro. The goals of this in vitro study were to investigate the potency of local anesthetic-induced vasoconstriction and to identify the physicochemical property (octanol/buffer partition coefficient, pKa, molecular weight, or potency) of local anesthetics that determines their potency in inducing isolated rat aortic ring contr...
The toxicity and time-dependent sorption of three hydrophobic organic chemicals to Rhodococcus rhodochrous bacteria were investigated. In experiments, environmentally relevant concentrations of pentachlorophenol (PCP), hexachlorobenzene (HCB), and dichlorobiphenyl (DPCB) were applied to living (both growing and nongrowing) bacteria as well as to dead bacteria. For PCP (an ionizing chemical), ba...
A solid-phase microextraction (SPME) procedure was evaluated for its application in measuring solute release in the headspace (HS) and in the liquid phase (DI) from emulsified and nanostructured materials. Limonene, a hydrophobic flavor compound present in many foods and beverages, was used as a model solute for evaluating the SPME method. Sampling conditions, including SPME fiber type, samplin...
We determine the worst case behavior of the standard BPX-preconditioner for elliptic problems with arbitrary coefficient jumps along the boundaries of the coarsest partition. The counterexamples are also useful for other problems.
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