The pH is a negative logarithmic scale, which measures the molar concentration of hydrogen ions from 1 to 10 14 ions. It therefore has no unit of measurement. Numbers on a negative logarithmic scale ...

The 1970’s was the decade that illuminated the threat of acid rain to the citizens of the US. It had been known to exist several years before, but the sources of the problem did their best to suppress ...

American Journal of Botany, Vol. 13, No. 5 (May, 1926), pp. 265-275 (12 pages) 1. Sections of root tips of hyacinth, buckwheat, pea, soybean, and lupine, fixed in chrom-acetic acid, were stained with ...

Take care to use the word 'dilute' correctly. It can be used as an adjective to describe the concentration of a solution (as here), or as a verb to describe the process of adding more water to a ...