광합성은 지구생태계가 유지되는 가장 중요한 반응이다.
6CO2 + 12H2O →> C6H12O6 + 6H2O + 6O2
광합성은 명반응과 CO2 고정 반응으로 일어난다.
명반응에서 H2O는 빛에 의해 분해되어 전자(e-), H+와 O2가 발생하고, 전자는 엽록체의 thylakoid 막 안팎에 존재하는 전자 전달자들로 전달되어 NADP를 환원시
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
(1)Place 0.75(∓0.001g) unknown sample in 250ml beaker
and add 100ml distilled water.
(2) Do Experiment in the same way with Experiment A.
(3) Calculate mass and percentage of Na2C2O4 in unknown oxalate. And Calculate ratio in the same way with Exp A.
Experiment Condition
95% N2: 5% H2 gas mix 99.995% using pure gases
Equipped with a Pd catalyst at 20~25oC
Solutions were purged with O2-free N2
and stored in the chamber for least 5 days.
0.25M Fe(Ⅱ) and other samples were prepared inside the chamber and using material for at least 5 days .
Stock Fe(Ⅱ) solutions were stored at pH<1.0 in amber containers wrapped with aluminum foil
1. Uptake Hydrogenase
1) Definition of Uptake Hydrogenase and Mechanism of Hydrogen Production
Uptake hydrogenases are Ni-Fe enzymes that catalyze the conversion of hydrogen gas to hydrogen ions and electrons. They are found in the heterocysts and not in the vegetative cells of nitrogen-fixing strains of cyanobacteria. They remove the hydrogen gas produced by nitrogenase when they carry o