type and quantity of dissolved salts. the problems that result vary both in kind and degree, and are modified by soil, climate and crop. salinity salts in soil or water reduce water availability to the crop to such an extent that yield is affected. water infiltration rate relatively high sodium or low...
time-consuming in the restructured economy. women's benefits also made them less attractive employees, and during privatization many companies fired women. while % of women were in the labor market in the s, by women made up – % of unemployed russians. those jobs available to women in the s were often in low-wage...
was prepared starting from cyanoacetic acid methylester via -cyano- -(hydroxyimino)acetic acid methylester. before thionation, the ester had to be hydrolyzed. the optimum conditions for each reaction were identified. p s was found to be the efficient thionation reactant resulting in the formation of...
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ptfe-values and fittings provide an inert environment • programmed to dispense precise amounts from syringes at the same time • easy mounting and replacement of syringes peristaltic pump • individually operated pumps • accurate delivery over a wide range of flow rates • specialized design to provide low...