The method is based on the redox reaction between 4,4′-tetramethyldiaminothiobenzophenone (thio-Michler's ketone) and chlorine at pH 3.5; 2-methoxyethanol and Triton X-100 are used to keep the reagent in solution. The absorbance of the blue quinoidal product is measured at 640 nm. Linear calibration is obtained for 0.2−1.0 mg l−1 chlorine. The method is suitable for tap waters.
The paper describes some test results obtained in the diamond grinding of modern cermet tool materials, which are becoming more widely used in the metalworking industry. In general, a relatively low G-ratio, low material removal rate and high power consumption will be observed. A rigid grinding machine is needed, with no vibrations and adequate spindle Cheap Nike Air Force 1
The paper presents a general result on the order of means of rank scores under setup of stochastic inequalities between the original observations. Buy Nike Air Yeezy 2 Online
The result also describes the order of the ranks themselves. Some illustrative applications in the change-point problem are introduced.
In a pure exchange economy immiserizing growth occurs when an increase in the endowment of one trader results in a new equilibrium where that trader has lower utility. This paper demonstrates that such perverse behavior is ruled out when excess demands satisfy a particular gross substitute condition.