Definition of diazomethane in English:

diazomethane

noun dʌɪˌazəʊˈmiːθeɪndʌɪˌeɪzəʊˈmiːθeɪndīˌazōˈmeTHān

mass nounChemistry

A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis.
Chemical formula: CH₂N₂
Example sentencesExamples
- Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor.
- Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA.
- Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.
- With diazomethane itself, you can watch its color disappear and know that something's happening.
- The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms.

Origin

Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane.

Definition of diazomethane in US English:

diazomethane

noundīˌazōˈmeTHān

Chemistry

A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis.
Chemical formula: CH₂N₂
Example sentencesExamples
- Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA.
- With diazomethane itself, you can watch its color disappear and know that something's happening.
- Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor.
- The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms.
- Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.

Origin

Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane.

单词	diazomethane
释义	Definition of diazomethane in English: diazomethane noun dʌɪˌazəʊˈmiːθeɪndʌɪˌeɪzəʊˈmiːθeɪndīˌazōˈmeTHān mass nounChemistry A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis. Chemical formula: CH₂N₂ Example sentencesExamples Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor. Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA. Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane. With diazomethane itself, you can watch its color disappear and know that something's happening. The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms. Origin Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane. Definition of diazomethane in US English: diazomethane noundīˌazōˈmeTHān Chemistry A poisonous, reactive yellow gas used as a methylating agent in chemical synthesis. Chemical formula: CH₂N₂ Example sentencesExamples Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA. With diazomethane itself, you can watch its color disappear and know that something's happening. Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor. The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms. Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane. Origin Late 19th century: from diazo- (indicating the presence of two nitrogen atoms) + methane.
随便看	aguishly aguishness Agulhas, Cape Agulhas Current agung Agung agush AGW agy ah aha aha experience Ahaggar Mountains a hair a hair a hair's breadth a hair shirt a halt ahal-teke Ahal-Teke ahal-tekke Ahal-Tekke aha moment a hand a hand