넓은 의미로는 생물의 진화에 관해 연구하는 학문분야를 말하는데, 여기서는 진화론의 역사를 개관하기로 한다. 고대 그리스의 자연철학자들 중에는 사물의 생성(生成)문제를 논한 사람이 많았다. 그 중 한 사람인 엠페도클레스는 지(地) ·수(水) ·풍(風) ·화(火) 4원소의 결합 분리로 경험세계의 생멸
speciated PM2.5 air-measurement data sets collected during the summers of 2003 and during the winters of 2004 in two site: Jeonnongdong in Seoul & Yonghyundong in Incheon. Sources modeled were soil dust, road dust, gasoline vehicle emissions, diesel vehicle emissions, point, municipal incinerator, coal-fired power, biomass burning and marine emissions. As a result, vehicle emissions were the larg
III. The Four Main Issues
In this survey, we picked 4 issues, which got nationwide interest among Koreans. One of our goals is to figure out coexistence of the Rally effect and left-skewed, cynical attitude of blogs, we needed to select controversial issues and they should be criticized by bloggers. Selected ones are the Cheonan sinking, the mad cow fears, the 4 major rivers project and the
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