ammonia synthesis takes place in large steel reactors that are designed to withstand very high pressures (up to one thousand atmospheres) and high temperatures (about 700°C or 1300°F). The reactors also resist attack by hydrogen gases which can corrode many metals, especially at high temperature and pressure. The catalyst in commercial ammonia synthesis is usually an iron oxide mixed with a sma
Ⅰ. 서론
급속한 경제발전과 도시 인구의 폭증 및 생활수준 향상으로 인하여 용수량의 증가를 비롯한 각종 산업폐수, 생활 하·폐수와 정화조 오수 및 축산폐수의 배출량이 증가 하게 된다. 이와 같이, 폐수의 배출량이 급격히 증가함에 따라 상수원인 팔당호를 비롯하여 전국의 주요 호소 및 상수원
:
Maximum 200°C/min
*Separate Electric furnace and other system like Electronic scale
-Because Electric furnace temperature is very high
so we need to protect other system.
instrument composition
-Electric furnace
Temperature range:
25°C~1500°C
Heat speed :
Maximum 200°C/min
*Nitrogen or Argon in Electric furnace
-Because the inhibition of oxidization of sample
Characteristic of MOGS
1. Metal oxides possess electronic, chemical, and physical properties of high sensitivity to changes in their chemical environment.
2. The sensing properties of semiconductor metal oxide assures improved selectivity and stability
3. Their peculiar characteristics and size effects make them interesting for metal oxide gas sensors
The reason we take Nox as targe
Ⅰ. 서론
우리의 조상은 천연의 식물이나 광물에서 색소를 추출하여 헤아릴 수 없이 많은 우리 고유의 색을 창출하고 있었음은 현존하는 유물이나 옛 문헌에서 엿 볼 수 있다. 그러나 19세기 말경 합성염료가 보급되면서 번거롭고 비능률적인 작업과정을 거쳐야 하는 재래의 식물염색은 점차 쇠퇴하
Synthesize aniline by the reduction with iron and hydrochloric acid
Amination
Process by which an amine group is introduced into an organic molecule
- Ammonolysis : reaction with ammonia or another amine such as an alkylation
Ex)RX+NHv → RNHv+HX
RCOCl+2NH3 → RCONH2+NH4Cl
RCOOC2H5+NH3 → RCONH2+C2H5OH
- Reduction : reductive amination with m
1916 First report on the immobilization of proteins: adsorption of invertase on activated charcoal.
1956 Invention of the first oxygen electrode [Leland Clark]
1962 First description of a biosensor: an amperometric enzyme electrode for glucose. [Leland Clark]
1969 First potentiometric biosensor: urease immobilized on an ammonia electrode to detect urea. [Guilbault and Montalvo]
1970 Inve
like technology of removal defect, accuracy of pattern and registration. But recently as directed self-assembly(DSA) technology is advanced, that can reduce the defect of pattern which is substitution of existing optical lithography technology and will be important role in making semiconductor minute pattern.
Naturally, the DSP has also demerits. If we use anodic aluminum oxide(AAO), we can
ammonia), 벤조피렌(benzopyrene) 등의 수많은 독성물질이 함유되어 있는데 약 40여 종의 물질들이 발암물질로 알려져 있으며, 최근에는 강력한 발암물질로 알려진 다이옥신(dioxin)이 담배 속에 포함되어 있는 것으로 밝혀졌다. 하루 4개비 이상의 흡연을 하는 사람들 중에 85-90%는 정기적인 흡연자가 된다고 한
ammonia-N (NH4+) and nitrite-N (NO2-)
DON is a mixture of compounds ranging from amino acids to complex humic substances
N losses In Agricultural Fields
Generally, studies for N losses has not considered DON but DIN in agricultural systems
Whereas DON has been regarded as a major component in N losses of nonagricultural systems
Albeit lack of knowledge on DON, The idea is growing that