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ملخص
A steroid is a biologically active organic compound with four rings arranged in a specific molecular configuration. Steroids have two principal biological functions: as important components of cell membranes which alter membrane fluidity; and as signaling molecules. Hundreds of steroids are found in plants, animals and fungi. All steroids are manufactured in cells from the sterols lanosterol (opisthokonts) or cycloartenol (plants). Lanosterol and cycloartenol are derived from the cyclization of the triterpene squalene.The steroid core structure is typically composed of seventeen carbon atoms, bonded in four "fused" rings: three six-member cyclohexane rings (rings A, B and C in the first illustration) and one five-member cyclopentane ring (the D ring). Steroids vary by the functional groups attached to this four-ring core and by the oxidation state of the rings. Sterols are forms of steroids with a hydroxy group at position three and a skeleton derived from cholestane.: 1785f Steroids can also be more radically modified, such as by changes to the ring structure, for example, cutting one of the rings. Cutting Ring B produces secosteroids one of which is vitamin D3.
Examples include the lipid cholesterol, the sex hormones estradiol and testosterone,: 10–19 and the anti-inflammatory drug dexamethasone.Overcome may refer to:
Overcome (Alexandra Burke album), 2009
Overcome (All That Remains album), 2008
"Overcome" (Creed song), 2009
"Overcome" (Live song), 2001
"overcome" (Tricky song)
"Overcome", a song by Stephanie McIntosh from Tightrope
"Overcome", a song by Wayne Marshall from the compilation album Diwali Riddim
Overcome (band), an American metalcore bandA message is a discrete unit of communication intended by the source for consumption by some recipient or group of recipients. A message may be delivered by various means, including courier, telegraphy, carrier pigeon and electronic bus.
A message can be the content of a broadcast. An interactive
exchange of messages forms a conversation.One example of a message is a press release, which may vary from a brief report or statement released by a public agency to commercial publicity material.
اللغة الأصلية | ???core.languages.en_GB??? |
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المعرِّفات الرقمية للأشياء | |
حالة النشر | ???researchoutput.status.published??? - 2020 |
سلسلة المنشورات
الاسم | skype.com |
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بصمة
أدرس بدقة موضوعات البحث “How To Help Steroid Use Overcome Text Messaging?'. فهما يشكلان معًا بصمة فريدة.المشاريع
أنشطة
- 1 آخر
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Invited presentation: Reasons Why People Start Using Weight Loss
Fritchley, M. (???activity.roles.otheractivity.participant???)
2021 → …نشاط: آخر