翻訳と辞書 ・ 20,000 Leagues Under the Sea (1916 film)
・ 20,000 Leagues Under the Sea (1954 film)
・ 20,000 Leagues Under the Sea (1985 film)
・ 20,000 Leagues Under the Sea (1997 Hallmark film)
・ 20,000 Leagues Under the Sea (1997 Village Roadshow film)
・ 20,000 Leagues Under the Sea (disambiguation)
・ 20,000 Martyrs of Nicomedia
・ 20,000 Men a Year
・ 20,000 Streets Under the Sky
・ 20,000 Streets Under the Sky (album)
・ 20,000 Watt R.S.L.
・ 20,000 Years in Sing Sing
・ 20-30 Bromfield Street
・ 20-Dihydroprogesterone
・ 20-gauge shotgun
・ 20-Hydroxyecdysone
・ 20-Hydroxyeicosatetraenoic acid
・ 20-meter band
・ 20-N
・ 20-pair colour code (Australia)
・ 20-Pipe Well
・ 20-point agreement
・ 20-sim
・ 20-yard shuttle
・ 20.3 cm K (E)
・ 20.3 cm SK C/34 naval gun
・ 20.3 cm/45 Type 41 naval gun
・ 20/20 (band)
・ 20/20 (Canadian TV series)
・ 20/20 (Colombian TV series)
|
|
| 20-Hydroxyecdysone ： ウィキペディア英語版 |
20-Hydroxyecdysone
20-Hydroxyecdysone (ecdysterone or 20E) is a naturally occurring ecdysteroid hormone which controls the ecdysis (moulting) and metamorphosis of arthropods. It is therefore one of the most common moulting hormones in insects, crabs, etc. It is also a phytoecdysteroid produced by various plants, including ''Cyanotis vaga'', where its purpose is presumably to disrupt the development and reproduction of insect pests. In arthropods, 20-hydroxyecdysone acts through the ecdysone receptor. Although mammals lack this receptor, 20-hydroxyecdysone may affect mammalian (including human) biological systems ''in vitro'', but there is uncertainty whether any ''in vivo'' or physiological effects occur. 20-Hydroxyecdysone is an ingredient of some supplements that aim to enhance physical performance, but there is no clinical evidence for this effect.〔
==Sources in arthropods==
The primary sources of 20-hydroxyecdysone in larvae are the prothoracic gland, ring gland, gut, and fat bodies. These tissues convert dietary cholesterol into the mature forms of the hormone 20-hydroxyecdysone. For the most part these glandular tissues are lost in the adult with exception of the fat body, which is retained as a sheath of lipid tissue surrounding the brain and organs of the abdomen. In the adult female the ovary is a substantial source of 20-hydroxyecdysone production. Adult males are left with, so far as is currently known, one source of 20-hydroxyecdysone which is the fat body tissue. These hormone producing tissues express the ecdysone receptor throughout development, possibility indicating a functional feedback mechanism.
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「20-Hydroxyecdysone」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.
|
|