Plant defense against herbivory which differ from one another in both functional groups, and in basic carbon skeletons. Monoterpenoids, continuing 2 isoprene units, are volatile essential oils such as citronella, limonene, menthol, camphor, and pinene. Diterpenoids, 4 isoprene units, are widely distributed in latex and resins, and can be quite toxic. Diterpenes are responsible for making "Rhododendron" leaves poisonous. Plant steroids and sterols are also produced from terpenoid precursors, including vitamin D, glycosides (such as digitalis) and saponins (which lyse red blood cells of herbivores). Phenolics, sometimes called "phenols", consist of an aromatic 6-carbon ring bonded to a hydroxy group. Some phenols have antiseptic
Mountaineer Power Plant that coal now comes via barge on the Ohio River to an elaborate coal unloading and storage facility.The other portion of coal comes from Big River Mining. An underground coal mine right across the street from the plant. It is mined, cleaned, processed, and shipped by a belt line across the street to the power plant. This single boiler, dual turbine plant produces enough energy to power a city approximately the size of Columbus, Ohio. The plant is connected to the grid by 765 kilovolt transmission lines (the highest rated voltage used in the United States). The location of the