Energy flows from producers to primary consumers, to secondary consumers, to tertiary consumers... Energy is lost between trophic levels in the form of heat through cell respiration, faeces, tissue loss and death. Some of this lost energy is used by detritivores and saprotrophs.
Methanol, acetone, and isopropanol belong to the first group. These substances were detected and proposed as alcoholism indicators in connection with congener alcohol analyses of blood samples from DWIs. Methanol, in particular, has been adopted as a powerful indicator of alcohol misuse.
When considering the alcohol content, malt liquor has a higher alcohol content than beer. Malt alcohol often contains corn, added sugar, or other substances that increase the alcohol content. Beer contains less alcohol, usually less than five percent. Drinks that exceed this are called malt liquor, lager or ale.