④Distillation for 45min should provide the 12mL of cyclopentadiene
⑤continued distillation for half hour gives a total of about 20mL of monomer
주의) 얻어진 monomer는 실온에서 다시 dimer가 되기 때문에 cracking을 하는 동안 실험 2를 미리 준비 해놓고 실험 1에서 얻은 monomer를 바로 쓸 수 있게 한다.
① Place 6g of maleic anhydride in a 1
Sulfur Dioxide(SO2)
The release of SO2 to the atmosphere is the primary cause of acid rain in the world.
Fossil fuel combustion at electric power-generating plants accounts for about70% of
the emissions.
Coal, Oil, and all other fossil fuels naturally
contain some sulfur.
Volcanic eruptions are another more localized natural source of SO2
SO2 + OH. HSO3.
HS
2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara
Ⅰ. 서론
오늘날 Piaget의 인지발달에 관한 이론은 매우 영향력 있는 것임에도 불구하고 방법론적 측면에서 비판을 받고 있다. 그 이유는 첫째, 그의 인지발달에 대한 연구방법이 매우 광범위함에도 불구하고 면담동안에 질문을 바꾸는 등의 일관성 없는 방법을 사용하여 면담의 기본 규칙을 위배하였
Background
Diels-Alder Reaction
: An addition reaction between a 1,3-diene and an alkene called a dienophile, to form a new six-membered ring.
1) The reaction forms two σ and one π bond in a six-membered ring.
2) The reaction is initiated by heat.
3) All bonds are broken and formed in a single step. (concerted reaction)
4) The diene must react in the s-cis conformation
5) Electron