http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
양성봉,유미선 한국분석과학회 2005 분석과학 Vol.18 No.3
In this study, several kinds of volatile amines in ambiant air were collected and their concentrations were expected from the calibration curves prepared by standard solutions of 7 amines by the official measuring method prescribed in Japanese Offensive Odor Law. The obtained calibration curves showed a good linearity and the detection limit of trimethyl amine was found to be about 0.033 ppb (0.040 ng) in case of 50 liters air. It means that trimethyl amine could be detected with the concentration of lower than its permitting level at the border line of companies. As typical examples of measuring amines in air, results of investigation of two sewage works and one rendering plant around the capital area indicated that 4 kinds of amines, i.e. methyl amine, dimethyl amine, trimethyl amine and isopropyl amine were detectable and concentrations of trimethyl amine at the primary sedimentation pond and sludge dewatering building of the sewage plant A showed 9.07 ppb and 7.79 ppb respectively, being over the concentration of odor strength 2.5, And the aeration tank, excrement input facility and indoor of maintenance room of excrement process building in the sewage plant B showed 70.0 ppb of dimethyl amine and 2.44 ppb of trimethyl amine.
N,??-술피닐 비스 1,2,4-트리아졸을 이용한 에스테르와 β-락탐의 합성
양성봉 울산대학교 1990 연구논문집 Vol.21 No.1
N,??-슬피닐 비스-1,2,4-트리아졸은 THF용매에서 SOCI₂,아민 및 1,2,4-트리아졸로부터 쉽게 만들어진다. 이 화합물은 카르복시산의 직접 에스테르와 축합제로, 또한 β-아미노산으로부터 β-락탐을 만드는 탈수제로 이용될 수 있었다. 이 방법을 몇가지 카르복시산과 β-아미노산에 적용시켜 보았다. 이 합성시약의 이점은 첫째 반응 후 형성되는 1,2,4-트리아졸이 중성이기 때문에 대부분의 반응이 거의 중성에서 이루어질 수 있다는 점과 둘째로 1,2,4-트리아졸이 물에 잘 녹기 때문에 일반적인 물에 의한 처리로 생성물을 정제할 수 있어서 유기합성에 흔히 사용되는 크로마토그라피에 의한 분리가 요구되지 않는다는 점이다. N,??-Sulfinyl bis-1,2,4-triazole was conveniently prepared by the reaction of thionlyl chloride with 1,2,4-triazole. The reagent was efficient for the direct esterification of carboxylic acids and could be used as dehydrating reagent for the preparation of β-lactams form several β-amino acids. Several noteworthy featrures of this reagent are apparent as compared with previously known reagents. First, since the 1,2,4-triazole formed as only byproduct is a neutral compound, the reactions occur normally under neutral conditions. Second, the present methods are much simpler and less laborious than the conventional methods because obtained byproduct, 1,2,4-triazole can be easily removed by the usual aqueous workup and does not required chromatographic separation in most cases.