翻訳と辞書
Words near each other
・ Diasporus anthrax
・ Diasporus citrinobapheus
・ Diasporus diastema
・ Diasporus gularis
・ Diasporus hylaeformis
・ Diasporus quidditus
・ Diasporus tigrillo
・ Diasporus tinker
・ Diasporus vocator
・ Diaspro
・ Diassara
・ Diasser
・ Diassodou
・ Diasson
・ Diastaltica
Diastase
・ Diastasis
・ Diastasis (pathology)
・ Diastasis (physiology)
・ Diastasis recti
・ Diastasis symphysis pubis
・ Diastata
・ Diastatea
・ Diastatidae
・ Diastatomma
・ Diastatomma bicolor
・ Diastella
・ Diastellopalpus
・ Diastema
・ Diastema (disambiguation)


Dictionary Lists
翻訳と辞書 辞書検索 [ 開発暫定版 ]
スポンサード リンク

Diastase : ウィキペディア英語版
Diastase
A diastase (; from Greek
διαστασις, "separation") is any one of a group of
enzymes which catalyses the breakdown of starch
into maltose. Alpha amylase degrades starch to a mixture of the
disaccharide maltose, the trisaccharide maltotriose, which contains
three α (1-4)-linked glucose residues, and oligosaccharides known as
dextrins that contain the α (1-6)-linked glucose
branches. Diastase was the first
enzyme discovered.〔See:
*
*
*
* 〕 It was extracted from malt solution in 1833 by
Anselme Payen and Jean-François Persoz, chemists at a French
sugar factory.〔Payen & Persoz (1833), page 77. Payen and
Persoz found diastase in the seeds of barley, oats, and wheat, as well
as in potatoes (Payen & Persoz (1833), page 76).〕 The
name "diastase" comes from the Greek word διάστασις (''diastasis'') (a
parting, a separation) because when beer mash is heated, the enzyme causes the starch in the barley seed to transform quickly into soluble sugars and hence the husk to separate from the rest of the
seed.〔Payen & Persoz (1833), pages
75-76.〕〔( Etymology of "diastase" )〕 Today, diastase means any α-, β-,
or γ-amylase (all of them hydrolases) that can break down
carbohydrates.
The commonly used -ase suffix for naming enzymes was derived from
the name diastase.〔The naming of enzymes using the suffix
"-ase" has been traced to French scientist Émile Duclaux
(1840-1904), who intended to honor the discoverers of diastase by
introducing the practice in his book
( ''Traité de Microbiologie'' ), vol. 2 (Paris, France: Masson and Co.,
1899), Chapter 1, especially page 9.〕
When used as a pharmaceutical drug, diastase has the ATC code .
Amylases can also be extracted from other sources including plants, saliva and milk.
==See also==

* Takadiastase
* Whipple disease
* amylase

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Diastase」の詳細全文を読む



スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース

Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.