Recently an especially sensitive test has been developed for the detection of minute quantities of blood proteins in the urine. (ohiolabradoodles.com)
The human nose is actually much better than most people think it is, and humans can distinguish thousands of different smells even in minute quantities. (stephsdogtraining.ie)
There are countless examples in natural processes, especially chemical ones, where minute quantities have significant effects. (illconsidered.blogspot.ru)