For a great number of European safety groups, reaction calorimetry is the key technique for analysis of the main reaction in the risk assessment of chemical processes. A comparison of calorimetric studies of model reactions, the N-oxidation of two substituted pyridines with hydrogen peroxide, made by several European groups, can open the door to standardization of the methodologies used. However, the intrinsic experimental complexity of the model reactions, which included dosing at high temperature, a multiphase system and evaporation, and the different evaluation criteria, produced a considerable dispersion between the results obtained by the various groups.
Summary We generalize a result of Lehmann on the comparison of location experiments with uniform distributions on intervals. We compare a location experiment consisting of uniform distributions on parallelepipeds with a location experiment consisting of uniform distributions on convex bodies. We show that the first experiment can only be more informative than the second one if the convex bodies in the second experiment are themselves parallelepipeds. Further we show that the length of the edges of these parallelepipeds must fulfill a condition similar to the condition on the length of the intervals in Lehmann’s result.
, Hagen RM : Discrimination of Burkholderia mallei /pseudomallei from Burkholderia thailandensis by sequence comparison of a fragment of the ribosomal protein S21 ( rpsU ) gene . Eur J Microbiol Immunol (Bp) 2 , 148 – 156 ( 2012
In this work, the waste materials from the Aughinish (in Ireland) and the Seydisehir (formerly ETI Aluminium Inc. in Turkey)
alumina plants were compared on the base of chemical and the physical properties using thermal analysis, XRD and SEM techniques.
The results were shown that there are big differences in the chemical compositions of the red mud waste as well as the physical
properties. It was found that the Seydisehir red mud is more feasible for recovery of iron, but the Aughinish sample contains
more titanium oxide than the Seydisehir one. There are also some variations in the Bayer process of the plants since the calcium
and sodium oxides of the waste were different percentages.
referring to the notion of aim in order to build a theoretical framework that facilitates international comparisons between VET systems and also the description of their evolution from the past to the future.
In order to develop this theoretical
In this paper isothermal, isoperibolic and adiabatic calorimeters and a Power-Compensating DSC are compared by determining kinetic data of a simple test reaction. First, the kinetic parameters were analyzed using a conventional isothermal method, based on the analytic determination of the course of reaction. Subsequently, the kinetic data of the performed reaction were determined for the different types of calorimeters by simultaneously evaluating several measurements with identical initial conditions but different temperature courses. The kinetic parameters obtained by the different calorimeters agree reasonable well, indicating the reliability of kinetic data derived from thermokinetic methods.
The comparison of thermal and calorimetric properties of metal derivatives of 6-aminopicolinic acid (APH) is presented. The
salts and complexes of APH with Cr(III), Cd(II), Cu(II), Ni(II), Pb(II), Co(II)and Ag(I) have been studied by TG-DTA and DSC
methods up to 1200C in a nitrogen atmosphere. Decomposition processes are proposed. The decarboxylation, deamination and
carbonation of the organic fragments of molecules take place. The compounds decompose to metal or to metal oxides. The values
of the transition enthalpy were determinated.
. 687–732. Madison, WI.
et al., 2006. Comparison of artificial neural network and regression pedotransfer functions for prediction of soil water retention and saturated hydraulic conductivity. Soil
problem of literary comparative studies, which overcomes the narrow framework of comparisons and goes beyond tertium comparationis as a basis for finding similarities and differences in self-sufficient closed phenomena or zones. As a result of this
between this paper and the others. First of all the comparison was made from different perspectives that are not properly covered or sometimes not even mentioned in the literature. The second, the comparisons did not done on a basis of projects of some