claim: Research is used to test the validity of medical instruments.
evidence: A zymoscope , also known as a zymometer or zymosimeter -LRB- zymo - from Ancient Greek ζυμοω  : `` to leaven '' -RRB- , is an instrument used to determine fermentation efficiency of yeast by measurement of the amount of carbon dioxide produced from a given quantity of sugar .. Ancient Greek. Ancient Greek. yeast. yeast. carbon dioxide. carbon dioxide