| 词汇 | methyl |
| 释义 | methyl noun[ C or U ] chemistry specializeduk /ˈmeθ.ɪl/ us /ˈmeθ.əl/ the alkyl that comes from methane; often used before another noun in the name of chemical substances: 甲基 The four main parabens used as preservatives are methyl, ethyl, propyl and butylparabens.作为防腐剂的对羟基苯甲酸酯主要有四种: 甲基、乙基、丙基和丁基对羟基苯甲酸酯。 methyl bromide甲基溴 methyl alcohol甲醇 Chemicals, chemical compounds & gases acetic acid acetone acrolein acrylamide activated charcoal adenine agglomerate ethyl alcohol glyphosate H2O HCFC HFC hyaluronic acid hydrochloric acid laughing gas limescale metho meths oxyacetylene tartaric acid Examples of methylmethyl Consumption and production of methyl bromide was frozen at 1991 levels beginning 1995. In cotyledons, methyl esterification ranged from 25 to 40 mole% and was 31 mole% after desiccation. The holes as well as the thermocouple junctions were sealed by coating them with dissolved methyl methacrylate. Above this lowest aluminium block is a low-conductivity layer of methyl methacrylate. This gives the best resolution of methyl esters. When a hydrogen atom is abstracted from the methyl group, the cyclopropane ring of the radical produced opens up in a fast and irreversible step. All beans were fumigated with methyl bromide prior to use in cultures to avoid contamination by other thrips species. Although the ratios varied, the mean ratio for these two volatiles after 12 days of feeding was 4 : 1 o-nitrophenol : methyl salicylate. However, an analysis of pectin and pectin methyl esters in developing and maturing soybean seeds has not been reported. The mass spectra revealed that most of the branched methyl groups in the monomethylalkanes were located on odd numbered carbons. Methylated spirits, a mixture of ethyl alcohol (95%) and methyl alcohol (5%) was used as the pheromone. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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