quaternary compound
An agreement between a record label and a musician or music group, by which the musician or group agrees to record a certain number of songs to be published by the label.
plural of Siddall
(sports) An umpire or judge; an official who makes sure the rules are followed during a game. / A person who settles a dispute.
(chemistry) A cation consisting of a central positively-charged nitrogen atom with four substituents, especially organic (alkyl and aryl) groups, discounting hydrogen atoms.
研究者たちは、新しい四級アンモニウム化合物を合成しました。それは中心の窒素原子が正に帯電し、水素原子を除いて4つの有機置換基が結合しているため、殺菌性の界面活性剤として作用します。
Don't have an account? Sign up
Do you have an account? Login
DiQt
Free
★★★★★★★★★★
