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
Meaning (linguistics) that a word invokes for a person in addition to its literal or primary meaning. The original use of "meaning" as understood early in the 20th century occurred through Lady Welby, after her daughter translated the term "semantics" from French. Languages allow information to be conveyed even when the specific words used are not known by the reader or listener. People connect words with meaning and use words to refer to concepts. A person's intentions affect what is meant. "Meaning" (in English) as "intent" harkens back to the Anglo-Saxons and is associated today still, with the German verb "meinen" as