Phosphor (Energy Converter)
Inorganic phosphor materials
“Classical” inorganic phosphors usually consist of a host lattice with activator ions doped into it in small concentrations, typically a few mole percent or less.
Host lattice & Activator ion
1st type : weak interaction (Ln3+)
2nd type: strong interaction ( Mn2+, Eu2+, Ce3+, Pb2+,Sb3+, Ce3+, MoO42-, NbO43-)
Activator (+ Sensit
2.4 Fuel cell application
2.4.1 수소연료전지 자동차
수소 연료 자동차의 경우 기본적인 메카니즘은 탱크로부터 저장된 수소를 변환기를 통하여 본래 수소의 형태로 만들어 주고 그 이후에 만들어진 수소를 연료전지 과정을 통해 전기를 만들게 된다.
수소연료자동차 작동원리 <그림4>
Advantage
Environmental Energy source.
Reduce greenhouse gases emission
Primary role as a improvement of future environment.
Disadvantage
Economical Problem
Storage problem , Transport problem
1.United States
Perform the research and development through
DOE(Department Of Energy)
Invest a lot of fund in Stack technology.
2.Japan
Hydro Fuel cell research and develop
High-temperature decomposition
High-temperature splitting of water occurs at about 3000 °C. At this temperature, 10% of the water is decomposed and the remaining 90% can be recycled. To reduce the temperature, other processes for high temperature splitting of water have been suggested:
▸Thermo-chemical cycles.
▸Hybrid systems coupling thermal decomposition and electrolytic
물질(수분, 용매등), 고분자, 카본블랙(carbonblack), carbon fiber, 회분(ash), filler(충진제) 등의 함량을 검출하는데 이상적인 조성분석(compositional analysis)법이며, 고분자가 연소되는 온도영역에서는 분해속도(decomposition kinetics)가 고분자마다 서로 다르기 때문에 가치있는 고분자의 정량적 분석이 가능하다.
3. Synapse Characteristics
① Presynaptic cell에 신호 도착
② Na+ channel open, Ca+ channel open
③ Ca 이 synaptic vesicle들과 결합
④ vesicle들이 안에 담긴 neurotransmitter들을 synaptic cleft 방향으로 방출
⑤ Neurotransmitter는 receptor에 결합
⑥ postsynaptic cell의 Na channel open
⑦ postsynaptic cell에 depolarization
PHB`s Separation & Purification
Target of this study conducted to obtain a purely material PHB purification process debris in the damaged cells, and to remove the remaining medium components. PHB has been removed during the refining process with just remove the present efficiency of the overall purification stayed in the 70-80%.
PHB Synthesis Pathway
Alcaligenes eutrophus PHB in normal circ
of media
; managing load cell and direct irrigation pump
1. Fixed enzyme carrier
2. Separation and Refining of Bacteria& virus
3. Separation and Refining of DNA&RNA
4. The Catalysts for biochemical reaction
5. Disposing Water and Sewer
Fixation of enzyme and microorganism
: Bioreactor which uses columns that attach enzyme and micro-organism
when keeping on reacting of fermenting
Beverages, Jams, Fermented milks
Soy sauce, Vinegar, Soybean paste
Fruits, Vegetables, fish and meat
Etc : Baking, Ice cream, Gum …
Safety of Aspartame is approved by JECFA and EFSA
The process of digestion, absorption of aspartame is similar to protein in general foods
The methanol from aspartame decomposition is safe at current levels as a non-nutritive sweetener
But, because