hard water - water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap H2O, water - binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 10...
Soft water has been said to cause the bursting of Asian carp eggs and thus has been suggested as a factor that would limit the spread of this species. To evaluate this, we subjected fertilized eggs of bighead carp to waters with a wide range of hardness and dissolved-solid concentrations....
When performing a hardness progression, it is important to observe the rules for indent spacing. Edge retention is also required during the mechanical preparation of samples to ensure an accurate measurement of CHD. Case depth = Distance from surface to hardness limit ...
A Nanoindenter was used to estimate the Young's modulus of dehydrated peritubular and intertubular dentine from the unloading portion of the load displacement curve. The modulus values averaged 29.8 GPa for the peritubular dentine (considered to be a lower limit), and ranged from 17.7 to 21.1...
is often the maximum allowed for weld procedure qualification, in order to ensure hydrogen cracks are avoided. The risk of sulphide stress corrosion cracking occurs at even lower hardness and, for this reason, a limit of 248HV is imposed for the root of welds likely to contain sour products....
DLCcoatings may be used on valve stems due to the temperature limit of 573K. The low friction and wear of the hard layer are achieved in a dry environment, and the increased pressure and humidity cause increased friction[507]. The hardness of the valve steel decreases from 660 to 340HV ...
aYes, how much is the highest limit of the insured value? 是,被保险人价值的最高的极限是多少?[translate] aderivative 衍生物[translate] aIn a meta-analysis of 12 trials that included patients with and without diabetes and reported data with 12-month outcomes, patients randomly assigned to orli...
Don’t wait for water hardness to get out of hand before you try to fix it. As soon as you see the level creeping a little too close to the lower or upper limit of the appropriate range for your pool, take action. Our Top Pick Test Strips for Pools and Hot Tubs Tests for 7 ...
E. Martin's study of mortality and natural fluoride content of drinking-water have been reanalysed to take into account water hardness and four socioenvironmental factors (social-factor score, domestic air pollution, latitude, and rainfall). Correlations between mortality-rates and fluoride content ...
Wang, in Surface Engineering of Light Alloys, 2010 5.3.3 Effects of electrical parameters The larger amount of the porous outer layer of the coating leads to lower mechanical hardness, and thus worse performance. Much effort has been devoted to limit or to suppress the growth of the porous ...