Pyrolysis oil are affected by temperature, reaction time, algae species, algae concentration, reaction atmosphere, and catalysts, in subcritical water reaction conditions. Bio-oil typically requires significant additional treatment to render it suitable as a refinery feedstock to replace crude oil derived from petroleum, coal-oil, or coal-tar. Tar is a black mixture of hydrocarbons and free carbon obtained from a wide variety of organic materials through destructive distillation. Tar can be produced from coal, wood, petroleum, or peat. Wood-tar creosote is a colourless to yellowish greasy liquid with a smoky odor, produces a sooty flame when burned, and has a burned taste. It is
English words of Greek origin and spread to the others freely—including to Modern Greek. Traditionally, these coinages were constructed using only Greek morphemes, "e.g.", "metamathematics", but increasingly, Greek, Latin, and other morphemes are combined, as in "television" (Greek τῆλε + Latin "vision"), "metalinguistic" (Greek μετά + Latin "lingua" + Greek -ιστής + Greek -ικος), and "garbology" (English "garbage" + Greek -ολογία). These hybrid words were formerly considered to be 'barbarisms'. Some derivations are idiosyncratic, for example, "gas" from χάος; "hadron" from ἁδρός with the suffix "-on", itself abstracted from "anion" ἀνιόν; and "henotheism" < ἑνό(ς) 'one' + θεός 'god', though "eno-" is not used as