![]() Analysis of data from these experiments indicates that increased concentrations of calcium and magnesium in wastewater discharged to waste disposal ponds at the INEL increases the availability of strontium for transport beneath the ponds by decreasing strontium sorption to the surficial sediment. The effect of these cation concentrations on strontium sorption was quantified using multivariate least-squares regression techniques. The concentration of sorbed strontium and the percentage of strontium retained by the sediment were correlated to aqueous concentrations of strontium, calcium, and magnesium. Strontium linear sorption isotherm K(d)'s ranged from 12?1 to 85?3 ml/g, increasing as the concentration of calcium and magnesium decreased. Batch experimental techniques were used to determine strontium linear sorption isotherms and distribution coefficients (K(d)'s) using simulated wastewater solutions prepared at pH 8.0?0.1 with variable concentrations of calcium and magnesium. ![]() Geological Survey and Idaho State University, in cooperation with the U.S. The investigation was conducted by the U.S. The effects of calcium and magnesium on the distribution of strontium between a surficial sediment and simulated wastewater solutions were measured as part of an investigation to determine strontium transport properties of surficial sediment at the Idaho National Engineering Laboratory (INEL), Idaho. The distribution coefficients of all other trivalent rare earth ions can be estimated by applying the correlation towards the ionic radii.Įffects of calcium and magnesium on strontium distribution coefficientsīunde, R.L. With the Burton-Prim-Slichter theory, the equilibrium distribution coefficients can be calculated. The effective distribution coefficients for Nd(exp 3+), Sm(exp 3+) and Er(sup 3+) as dopants are determined experimentally as a function of the crystal growth velocity. Sample data were generated on the basis of the common factor model and…ĭistribution coefficients of rare earth ions in cubic zirconium dioxideĬubic zirconium dioxide crystals are grown with the skull melting technique. The effects of sample size, number of variables, and population value of the congruence coefficient on the sampling distribution of the congruence coefficient were examined. This study developed and investigated an empirical sampling distribution of the congruence coefficient. In the practical aspect, the method is suitable for conformational analyses of large biomacromolecules and calculations of mechanical properties of biomaterials, which is demonstrated by the studied systems including an amyloid dimer, lysozyme and adenylate kinase proteins, and the S2 subdomain of myosin.An Investigation of the Sampling Distribution of the Congruence Coefficient.ĮRIC Educational Resources Information Centerīroadbooks, Wendy J. The new approach is quite efficient since it avoids expensive atomistic molecular dynamics simulations and can start from already coarse-grained elastic network models. The method relies on the technique of fluctuation matching that has been devised earlier for parametrizing heterogeneous elastic network models based on data from atomistic molecular dynamics simulations. ![]() In the framework of normal-mode analysis, an arbitrary fine-grained model can be systematically converted to a more coarse-grained model, while the crucial low-frequency motions of the fine-grained system are able to be reproduced in the coarse-grained modeling. A multiscale coarse-graining method called the normal-mode analysis based fluctuation matching (NMA-FM) is developed for constructing coarse-grained models of biomolecular systems.
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