Iran جلوه های ماندگار نفت قسمت دوم Oil Lasting Effects Part II

An oil is any substance that is liquid at ambient temperatures and is hydrophobic but soluble in organic solvents. Oils have a high carbon and hydrogen content and are nonpolar substances. The general definition above includes compound classes with, and uses, including vegetable oils, petrochemical oils, and volatile essential oils. All oils can be traced back to organic sources. Etymology First attested in English 1176, the word oil comes from Old French "oile", from Latin "oleum",[1] which in turn comes from the Greek "ἔλαιον" (elaion), "olive oil, oil"[2] and that from "ἐλαία" (elaia), "olive tree".[3] The earliest attested form of the word is the Mycenaean Greek e-ra-wo, written in Linear B syllabic script.[4] Types Organic oils Organic oil is also produced by plants, animals, and other organisms through organic processes, and these oils are remarkable in their diversity. Oil is a somewhat vague term in chemistry; instead, the scientific term for oils, fats, waxes, cholesterol, and other oily substances found in living things and their secretions, are lipids. Lipids, ranging from waxes to steroids, are somewhat hard to characterise, and are united in a group almost solely based on the fact that they all repel, or refuse to dissolve in, water, and are however comfortably miscible in other liquid lipids. They also have a high carbon and hydrogen content, and are considerably lacking in oxygen compared to other organic compounds and minerals. Mineral oil Mineral oils ...

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