alder
英 ['ɔːldə]
美 ['ɔldɚ]
語源
英語の語源
- alder
- alder: [OE] Alder is an ancient tree-name, represented in several other Indo-European languages, including German erle, Dutch els, Polish olcha, Russian ol’khá, and Latin alnus (which is the genus name of the alder in scientific classification). Alder is clearly the odd man out amongst all these forms in having a d, but it was not always so; the Old English word was alor, and the intrusive d does not begin to appear until the 14th century (it acts as a sort of connecting or glide consonant between the l and the following vowel, in much the same way as Old English thunor adopted a d to become thunder). The place-name Aldershot is based on the tree alder.
- alder (n.)
- tree related to the birch, Old English alor "alder" (with intrusive -d- added 14c.; the historical form aller survived until 18c. in literary English and persists in dialects, such as Lancashire owler, which is partly from Norse), from Proto-Germanic *aliso (cognates: Old Norse ?lr, Danish elle, Swedish al, Dutch els, German erle), from *el-, the ancient PIE name of the tree (cognates: Russian olicha, Polish olcha, Latin alnus, Lithuanian alksnis).
例文
- 1. Modification for synthetic purposes on the Diels- Alder adducts 56 and 62 has only rarely been considered.
- 合成の目的を達成するために、Diels- Alder 付加物（56）と（62）を改造する問題はあまり考えられていない。
- 2.Diels- Alder reaction is one of the important research content in the fields of organic chemistry.
- Diels- Alder 反応は現在の有機化学分野の重要な研究内容の一つである。
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- 3. Activated olefinic bond Amine, thiol radical initiator, cationic initiator, dienes ( Diels - alder reactive ).
- 活性エチレンアミン、メルカプト基、開始剤、カチオン開始剤、オレフィン（のDiels- Alder 反応）。dd>
- 4.They were principally used to catalyze aldol，allylation，Diels- Alder ，ene and Friedel-Crafts reactions.
- これらは主にAldol、アリル化、Diels- Alder 、Ene、Friedel-Craftsなどの反応を触媒するために使用されている。
- 5.Diels- Alder reaction of 2-merhylene-1-pheny 1-1.3-butanedione catalysed by zinc chloride as lewis acid with 1.3-cylcopentadiene was reported.
- 塩化亜鉛をルイス酸触媒とし、2-メチレン-1-フェニル-1.3-ブタジエンと1.3-シクロペンタジエンのDiels- Alder 反応.