Definition & Bedeutung | Englisch Wort ACETALDEHYDE

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Definitionen von ACETALDEHYDE

1. Chemie: Acetaldehyd, Azetaldehyd

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Beispiele für die Verwendung von ACETALDEHYDE in einem Satz

• Smaller aldehydes such as formaldehyde and acetaldehyde are soluble in water, and the volatile aldehydes have pungent odors.
• Like all catalysts, they catalyze reverse as well as forward reactions, and in some cases this has physiological significance: for example, alcohol dehydrogenase catalyzes the oxidation of ethanol to acetaldehyde in animals, but in yeast it catalyzes the production of ethanol from acetaldehyde.
• Acetaldehyde (IUPAC systematic name ethanal) is an organic chemical compound with the formula , sometimes abbreviated as.
• Taft is the location of a phosphate processing facility owned by The Mosaic Company (formerly IMC-Agrico); the Dow/Union Carbide Taft/Star Petrochemical Plant, which produces a variety of organic chemicals such as acrolein, acrylic acid, and acetaldehyde; and part of the Waterford Nuclear Generating Station owned by Entergy Corporation.
• As discovered by site-directed mutagenesis, glutamate-268 is a key component of liver acetaldehyde dehydrogenase and is also critical to catalytic activity.
• Chisso, built in the 1930s, dumped the methylmercury used to make acetaldehyde (a chemical in plastic) into the water surrounding Minamata and other towns, causing the infamous Minamata disease and the resulting scandal.
• While the voile is incomplete, the wine is exposed to slight levels of oxidation that provoke chemical changes, producing acetaldehyde (as well as ethanol, standard alcohol) and sotolon, an aroma compound.
• The reaction is reversible; upon heating to about 80 °C, metaldehyde and paraldehyde revert to acetaldehyde.
• The original industrial route to acrolein, developed by Degussa, involves aldol condensation of formaldehyde and acetaldehyde:.
• Even with rigorous precautions to minimize adventitious moisture or proton sources, vinyl alcohol can only be stored for minutes to hours before it isomerizes to acetaldehyde.
• He found it quite remarkable that when paraldehyde was heated with a trace of the same acid, the reaction went the other way, recreating acetaldehyde.
• The reasons for this positive selection are not known, but it has been hypothesized that elevated concentrations of acetaldehyde may have conferred protection against certain parasitic infections, such as Entamoeba histolytica.
• Acetaldehyde from alcohol may also cause a headache either acutely or after a number of hours (hangover).
• In the laboratory it can be prepared via Grignard reaction by reacting ethylmagnesium bromide with acetaldehyde in dried diethyl ether or tetrahydrofuran.
• The conversion of acetoin into acetyl-CoA is catalysed by the acetoin dehydrogenase complex, following a mechanism largely analogous to the pyruvate dehydrogenase complex; however, as acetoin is not a 2-oxoacid, it does not undergo decarboxylation by the E1 enzyme; instead, a molecule of acetaldehyde is released.
• In the second stage, water and higher-boiling by-products, such as chlorinated acetaldehydes and acetic acid, are removed and acetaldehyde is obtained in pure form overhead.
• Its effects are similar to the medication disulfiram (Antabuse) in that it interferes with the normal metabolism of alcohol by preventing the breakdown of the metabolic byproduct acetaldehyde.
• Certain other cephalosporin antibiotic medications, like cefotetan and cefazolin are metabolized to a compound that has similar effects at blocking acetaldehyde metabolism, 1-methylthiotetrazole (1-MTT), and can cause the same hangovers upon alcohol ingestion.
• The heightened level of acetaldehyde this syndrome causes can result in mitochondrial dysfunction, valvular disease, oxidative damage, cell death, lowered effects of cardioprotective molecules, and an altered calcium transport and protein synthesis system.
• The leaf has an unusual taste from its volatile oil decanoyl acetaldehyde (3-Oxododecanal), a taste that is often described as "fishy", earning it the nickname "fish mint".

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