in 1mol/l potassium chloride solution(pH in KCl) or in 0.01mol/l calcium chloride solution(pH in CaCl_2).We take the glass electrode in a 1:5(mass fraction) as a rule in china,according to《Determination of pH value in forest soil》(LY/T1239-1999)issued by Forest Bureau of China ...
According to the chemical shifts, the duplex retains twofold symmetry in solution. The equilibrium between the syn and anti conformations of G9/G21 is strongly dependent on pH, but only weakly dependent on temperature (delta H approx. 16 kJ.mol-1). The first-order rate constant for the ...
(mostly organic) complexes or chelated forms and adsorbed or incorporated in colloidal particles. They can be characterized by different degrees of hydration and oxydation states. In the natural environment all these different forms of trace metals can be in equilibrium or at least in a steady ...
A determination of the products of reaction betweer various sulfide minerals and aqueous xanthate solution, and a correlation of the products with electrode rest potentials The surface reaction products formed when sulfide minerals react with xanthates were analyzed by spectrophotometric methods. These ...
In this work, a simple photometric method with high accuracy and precision for measuring trace amounts of free cyanide ion in aqueous solution is demonstrated. Under the evaluated conditions, we could determine CN concentration in the range of 5–70 ppm easily. The work is based upon the photo...
Purpose: automatic control of the sugar beet production processes, and may find application in other industries where desired pH measurement of liquid solutions and bringing them to the values of 20 & amp; deg; C. SUMMARY OF THE INVENTION: Controlled sample solution in the form of a partial ...
Details are given of a method for the determination of dissociation constants of acids by simple solubility measurements. The method is particularly useful for dibasic acids whose solubility in aqueous solution of low pH is too low to be determined precisely by normal analytical methods. The dissocia...
A convenient method for determination of enamel solution rate in vivo has been developed. The two upper central incisors are etched simultaneously for one or two minutes by a packet containing cellophane film moistened with 1.5 m lactate buffer at pH 4.5. Calcium diffusing into the cellophane is ...
(1969): General separation and quantitation of nucleic acids (in Japanese). Gakkai Shuppan Center, 251 pp., Tokyo. Google Scholar Murphy, J. and J. P. Riley (1962): A modified single solution method for the determination of phosphate in natual waters. Anal. Chim. Acta,27, 31–36. ...
Sex determination is a fundamentally important and highly diversified biological process, yet the mechanisms behind the origin of this diversity are mostly unknown. Here we suggest that the evolution of sex determination systems can be driven by a chromo