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Alkanol
In chemistry, an alcohol (), is a type of organic compound that carries at least one hydroxyl () functional group bound to a saturated carbon atom. Alcohols range from the simple, like methanol and ethanol, to complex, like sugar alcohols and cholesterol. The presence of an OH group strongly modifies the properties of hydrocarbons, conferring hydrophilic (water-loving) properties. The OH group provides a site at which many reactions can occur. History The flammable nature of the exhalations of wine was already known to ancient natural philosophers such as Aristotle (384–322 BCE), Theophrastus (–287 BCE), and Pliny the Elder (23/24–79 CE). However, this did not immediately lead to the isolation of alcohol, even despite the development of more advanced distillation techniques in second- and third-century Roman Egypt. An important recognition, first found in one of the writings attributed to Jābir ibn Ḥayyān (ninth century CE), was that by adding salt to boiling win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethanol
Ethanol (also called ethyl alcohol, grain alcohol, drinking alcohol, or simply alcohol) is an organic compound with the chemical formula . It is an Alcohol (chemistry), alcohol, with its formula also written as , or EtOH, where Et is the pseudoelement symbol for ethyl group, ethyl. Ethanol is a Volatility (chemistry), volatile, flammable, colorless liquid with a characteristic wine-like odor and pungent taste. As a psychoactive depressant, it is the active ingredient in alcoholic beverages, and the second most consumed drug globally behind caffeine. Ethanol is naturally produced by the fermentation process of sugars by yeasts or via petrochemical processes such as ethylene hydration. Historically it was used as a general anesthetic, and has modern medical applications as an antiseptic, disinfectant, solvent for some medications, and antidote for methanol poisoning and ethylene glycol poisoning. It is used as a chemical solvent and in the Chemical synthesis, synthesis of orga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanol
Methanol (also called methyl alcohol and wood spirit, amongst other names) is an organic chemical compound and the simplest aliphatic Alcohol (chemistry), alcohol, with the chemical formula (a methyl group linked to a hydroxyl group, often abbreviated as MeOH). It is a light, Volatility (chemistry), volatile, colorless and flammable liquid with a distinctive alcoholic odor similar to that of ethanol (potable alcohol), but is more acutely toxic than the latter. Methanol acquired the name wood alcohol because it was once produced through destructive distillation of wood. Today, methanol is mainly produced industrially by hydrogenation of carbon monoxide. Methanol consists of a methyl group linked to a polar hydroxyl group. With more than 20 million tons produced annually, it is used as a Precursor (chemistry), precursor to other commodity chemicals, including formaldehyde, acetic acid, methyl tert-butyl ether, methyl ''tert''-butyl ether, methyl benzoate, anisole, peroxyacids, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcohol
Alcohol may refer to: Common uses * Alcohol (chemistry), a class of compounds * Ethanol, one of several alcohols, commonly known as alcohol in everyday life ** Alcohol (drug), intoxicant found in alcoholic beverages ** Alcoholic beverage, an alcoholic drink * Rubbing alcohol, for sanitation and to kill germs Music * "Alcohol", a song by Barenaked Ladies from the 1998 album ''Stunt (album), Stunt'' * "Alcohol", a song by Beck from the 1993 single "Loser (Beck song), Loser" * Alcohol (Brad Paisley song), "Alcohol" (Brad Paisley song), 2005 * "Alcohol", a song by Butthole Surfers from the 1993 album ''Independent Worm Saloon'' * "Alcohol", a song by CSS from the 2005 album ''Cansei de Ser Sexy'' * "Alcohol", a song by Gang Green from the 1986 album ''Another Wasted Night'' * "Alcohol", a song by Gogol Bordello from the 2007 album ''Super Taranta!'' * "Alcohol", a song by the Kinks from the 1977 album ''Muswell Hillbillies'' and ''Everybody's in Show-Biz'' * "Alcohol", a song by Milli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt-effect Distillation
Salt-effect distillation is a method of extractive distillation in which a salt is dissolved in the mixture of liquids to be distilled. The salt acts as a separating agent by raising the relative volatility of the mixture and by breaking any azeotropes that may otherwise form. The technique is first attested in writings on alcohol attributed to Jabir ibn Hayyan (9th c. CE). Setup The salt is fed into the distillation column at a steady rate by adding it to the reflux stream at the top of the column. It dissolves in the liquid phase, and since it is non- volatile, flows out with the heavier bottoms stream. The bottoms are partially or completely evaporated to recover the salt for reuse. Usage Extractive distillation is more costly than ordinary fractional distillation due to costs associated with the recovery of the separating agent. One advantage of salt-effect distillation over other types of azeotropic distillation is the potential for reduced costs associated with ener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Etymonline
Etymonline, or ''Online Etymology Dictionary'', sometimes abbreviated as OED (not to be confused with the ''Oxford English Dictionary'', which the site often cites), is a free online dictionary that describes the etymology, origins of English language, English words, written and compiled by Douglas R. Harper. Description Douglas R. Harper is an American Civil War historian and copy editor for LNP Media Group. He compiled the etymology dictionary to record the history and evolution of more than 50,000 words, including slang and technical terms. The core of its etymology information stems from ''The Barnhart Dictionary of Etymology'' by Robert Barnhart, Ernest Klein's ''Comprehensive Etymology Dictionary of the English Language'', ''The Middle English Compendium'', ''The Oxford English Dictionary'', and the 1889–1902 ''Century Dictionary''. Harper also researches on digital archives. On the ''Etymonline'' homepage, Harper says that he considers himself "essentially and for the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kohl (cosmetics)
Kohl is a cosmetic product traditionally made by crushing stibnite (antimony sulfide). Modern kohl formulations often contain galena (lead sulfide), and in some cases charcoal or other pigments. Kohl is similar to eyeliner, which was traditionally made from charcoal. Kohl is widely used in many cultures to contour or darken the eyelids and heighten beauty marks. Several studies have questioned the safety of kohl out of fear of lead poisoning. Additionally, importing kohl into the United States is banned. Etymology The Arabic name formed the Arabic root , "to apply kohl." Transliteration variants of Arabic dialectal pronunciation include or . The English word ' is a loan of the Arabic word (via Middle Latin and French, originally, in the sense "powder of antimony"; the modern meaning is from the 18th century). Middle East and North Africa Kohl has been worn traditionally since the Naqada III era () by Egyptians of all social classes, originally as protection against e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aether (classical Element)
According to ancient and History of science in the Middle Ages, medieval science, aether (, alternative spellings include ''æther'', ''aither'', and ''ether''), also known as the fifth element or quintessence, is the material that fills the region of the universe beyond the Sublunary sphere, terrestrial sphere. The concept of aether was used in several theories to explain several natural phenomena, such as the propagation of light and gravity. In the late 19th century, physicists postulated that aether permeated space, providing a medium through which light could travel in a vacuum, but evidence for the presence of such a medium was not found in the Michelson–Morley experiment, and this result has been interpreted to mean that no luminiferous aether exists. Mythological origins The word (''aithḗr'') in Homeric Greek means "pure, fresh air" or "clear sky". In Greek mythology, it was thought to be the pure essence that the gods breathed, filling the space where they lived, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aqua Vitae
''Aqua vitae'' (Latin for "water of life") or aqua vita is an archaic name for a strong aqueous solution of ethanol. These terms could also be applied to weak ethanol without rectification. Usage was widespread during the Middle Ages and the Renaissance, although its origin is likely much earlier. This Latin term appears in a wide array of dialectical forms throughout all lands and people conquered by ancient Rome. The term is a generic name for all types of distillates, and eventually came to refer specifically to distillates of alcoholic beverages (liquors). ''Aqua vitae'' was typically prepared by distilling wine and in English texts was also called ardent spirits, spirit of wine, or spirits of wine, a name that could be applied to brandy that had been repeatedly distilled. The term was used by the 14th-century alchemist John of Rupescissa, who believed the then newly discovered substance of ethanol to be an imperishable and life-giving "fifth essence" or '' quintessen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Of Rupescissa
:''Johannes de Rupescissa may also refer to Cardinal Jean de La Rochetaillée'' Jean de Roquetaillade, also known as John of Rupescissa, (ca. 1310 – between 1366 and 1370) was a French Franciscan alchemist and eschatologist. Biography After studying philosophy for five years at Toulouse, he entered the Franciscan monastery at Aurillac, where he continued his studies for five years longer. His experiments in distillation led to the discovery of what he termed '' aqua vitæ'', or usually ''quinta essentia'', and commended as a panacea for all disease. His work as an alchemist forms the subject-matter of ''De consideratione quintæ essentiæ'' (Basle, 1561) and ''De extractione quintæ essentiæ''; likewise ''Libellus de conficiendo vero lapide philosophico ad sublevandam inopiam papæ et cleri in tempore tribulationis'' (Strasburg, 1659). His prophecies and violent denunciation of ecclesiastical abuses brought him into disfavour with his superiors, resulting in his imp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnald Of Villanova
Arnaldus de Villa Nova (also called Arnau de Vilanova, Arnaldus Villanovanus, Arnaud de Ville-Neuve or Arnaldo de Villanueva, c. 1240–1311) was a physician and a religious reformer. He is credited with translating a number of medical texts from Arabic, including works by Ibn Sina Avicenna, Abu-l-Salt, and Galen. Biography Arnaldus' place and date of birth are debated: some historians believe he was born in Villeneuve-lès-Maguelone, a village near Montpellier; others are doubtful, because there are also towns of the same name in Aragon such as Villanueva de Jiloca, in the Kingdom of Valencia, in Catalonia, in Languedoc, or in the Provence. Regardless, he is known in Catalonia, Valencia, and Balearic Islands by the name "Arnau de Vilanova," and it is certain that he wrote most of his works in Catalan (''Confessió de Barcelona'', ''Raonament d'Avinyó''). Whatever the reality, Arnaldus had a great reputation as a doctor, theologian and alchemist. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fractional Distillation
Fractional distillation is the separation of a mixture into its component parts, or fractions. Chemical compounds are separated by heating them to a temperature at which one or more fractions of the mixture will vaporize. It uses distillation to fractionate. Generally the component parts have boiling points that differ by less than 25 °C (45 °F) from each other under a pressure of one atmosphere. If the difference in boiling points is greater than 25 °C, a simple distillation is typically used. A crude oil distillation unit uses fractional distillation in the process of refining crude oil. History The fractional distillation of organic substances played an important role in the 9th-century works attributed to the Islamic alchemist Jabir ibn Hayyan, as for example in the ('The Book of Seventy'), translated into Latin by Gerard of Cremona (c. 1114–1187) under the title . The Jabirian experiments with fractional distillation of animal and vegetable subs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taddeo Alderotti
Taddeo Alderotti (Latin: Thaddaeus Alderottus, French : Thaddée de Florence), born in Florence between 1206 and 1215, died in 1295, was an Italian doctor and professor of medicine at the University of Bologna, who made important contributions to the renaissance of learned medicine in Europe during the High Middle Ages. He was among the first to organize a medical lecture at the university. One of his works describes a method for concentrating ethanol involving repeated fractional distillation through a water-cooled still, by which an ethanol purity of 90% could be obtained. Dante seems to reference him in the Paradiso (XII, 82-85), indicating he pursued learning not for spiritual reasons but worldly ambition, contrasting him with St. Dominic. Life Taddeo Alderotti was born in Florence, 1210, and received his primary education there.Thomas F. Glick, Steven Livesey, and Faith Wallis, ''Medieval Science, Technology, and Medicine: An Encyclopedia'' (Routledge, 2014) In the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
