closed-chain
closed-chain — 形容詞
1. describing a molecule whose atoms form one or more closed rings, with every atom
閉環的
原子連結成封閉環狀的分子結構
describing a molecule whose atoms form one or more closed rings, with every atom linked to two neighbours and no loose ends
Benzene is the simplest closed-chain hydrocarbon, with six carbon atoms forming a ring.
苯是最簡單的閉環烴類，由六個碳原子組成一個環。
closed-chain + hydrocarbon (attributive use)
Dr. Okonkwo drew the closed-chain sugar as a ring of atoms and the open-chain form as a straight strand.
Okonkwo 博士把閉環糖畫成原子環，而開鏈形式則畫成直鏈。
Professor Yilmaz asked the class to draw a closed-chain compound with nitrogen and oxygen forming a five-membered ring.
Yilmaz 教授要求班上學生畫出氮和氧組成五元環的閉環化合物。
Factory engineers use closed-chain nylon for hot components because it resists heat better than the straight-chain polymer.
工廠工程師將閉環尼龍用於高溫零件，因為它比直鏈聚合物更耐熱。
In water, glucose molecules mostly take a closed-chain shape rather than a linear one.
在水溶液中，葡萄糖分子大多以閉環構形存在，而非線性構形。
- cyclic
a broader term used in chemistry and mathematics; 'closed-chain' applies only to molecular structure
- ring-structured
less formal, often found in textbooks and teaching materials
- heterocyclic
specifically describes a ring that contains atoms of more than one element, such as carbon and nitrogen together
- open-chain
describes molecules whose atoms are linked in a straight line, not a ring
- acyclic
the general chemical term for any structure that is not cyclic
文法句型
closed-chain + noun
用法筆記
Used almost exclusively as an attributive adjective before nouns such as 'compound', 'structure', 'molecule', and 'hydrocarbon'. The antonym 'open-chain' describes molecules whose atoms form a line with two free ends.