Investigates thermodynamically the Pb-oxychlorides formed during urban refuse incineration/melting by way of high-temperature XRD and activity determination of such solid oxychlorides,including the binary phase diagram of PbO-PbCl_2,the relative chemical potential of PbO and standard free energy of formation or Gibbs free energy of activation of intermediate compounds. A thermodynamical basis is thus provided for the formation and precipitation reaction of Pb-oxychlorides during melting.
A comparison on determining activities of ~(238)U and ~(232)Th based on transfer samples and some associations of ideas for some investigation passed of environment radiation
It was resulted that the activity of La_2O_3 increases with the increase of CaF_2 concentration or with the decrease of Al_2O_3 concentration when the La_2O_3 concentration remained constant;
For study the relations between renovation of brain tissue and 3H－TdR（3H－thymidine）incorporation， 20 Kunming mice were made into model of traumaite brain injury by surgery，and other 5 Kumming mice served as control．Brain tissue at injury region was excavated, and 3H-TdR was assayed on the third day,the first,second and third week after surgery， re-spectively.
First we discussed a new method of DMT(Donnan membrane technique) that is used to measure the heavy metal activities to measure the activities of Copper(Cu) and Cadmium (Cd) in Cu-Cd-Ca-EDTA solution. At the same time we calculated the activities of Cu and Cd in Cu-Cd-Ca-EDTA solution by MINTEQ2 to compare the results that was measured and calculated.
The necessity of an individualized approach for assessment of chemical compound safety for humans in emphasized: it should be based on the activity determination of certain enzymes in each subject.
Furthermore, both receptor binding assay and radioimmunoassay have been utilized for the activity determination, and both fractions display almost full biological activity with porcine insulin as the standard.
The purpose of this series is to make a thermodynamic analysis of the Fe-C system with a minimum of assumptions and to revise the equilibrium diagram of the same system in the light of the results of this investigation. In this paper, the first of the series, activities in liquid Fe-C alloys have been evaluated up to saturation, using Richardson and Dennis' data123 on dilute solutions of carbon in liquid iron and Darken and Smith's model~([1]) for carbon dissolved in austenite with certain modifications.A p...
A modified Gibbs-Duhem equation has been derived with a view to evalu- ating activities of both components of a binary system from the measured ratios of the activities of the two components.This equation has been applied to a num- ber of melts of systems PbCl_2-SnCl_2,PbCl_2-CdCl_2,AgCl-CuCl,Cu_2S-FeS,PbO-BiO_(1.5), PbO-SbO_(1.5),CaO-CaF_2 and CaO-SiO_2-CaF_2 on the basis of our own experimental data as well as those reported in the literature. The method of evaluating activities of Ag and Pb from the bina...
为了从二元系中两组元活度的测定值之比求得该两组元的活度值,导出了一个变通的 Gibbs-Duhem 方程式,并在 PbCl_2-SnCl_2,PbCl_2-CdCl_2,AgCl-CuCl,Cu_2S-FeS,PbO-BiO_(1.5),PbO-SbO_(1.5),CaO-CaF_2及 CaO-SiO_2-CaF_2等冶金熔体中得到应用.多年前所发展的从 Ag 和 Pb 二元相图求得两组元活度的方法已扩大到含有单个 AB 化合物的二元系.用这一方法已求得 In-Sb 和 Sn-Te 系中各组元的活度.在研究某些黑色冶金渣与金属间的平衡时,用一适当选择的非铁金属代替 Fe作为熔剂金属有助于克服某些实验上的困难.采用 Sn 或 Cu 与熔渣平衡研究了 CaO-SiO_2,CaO-Al_2O_3和 CaO-SiO_2-Al_2O_3体系.对 CaO-SiO_2二元系获得的数据可以认为具有足够的准确度来验证 Masson 模型的合理性.
The activity of La_2O_3 in liquid slags of various composition of La_2O_3-Al_2O_3-CaF_2 ternary system has been determined by equilibrating the slag with liquid Sn in a graphite crucible under one atmosphere of CO at 1600℃ in Mo-wire furnace. The iso-activity diagram and the liquid boundary for La_2O_3 at 1600℃ were ascertained. It was resulted that the activity of La_2O_3 increases with the increase of CaF_2 concentration or with the decrease of Al_2O_3 concentration when the La_2O_3 concentration remained...
活度测定
activity determination
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