PFCs(Perfluorinated Chemicals)
Manmade chemicals, synthetic
Resistant to heat, water, oil, grease & stains
Stable, extremely resistant to breakdown
Widely used in diverse applications
Economically useful
Electronegativity of Fluorine
Partial charges in the polarized C-F bond
C-F bond
: strongest bond in
organic chemistry
: high energy bond
Two most studied compounds
Nowadays, ‘eutrophication’ presents as one of the most serious ecological problems of open water sources such as lakes, oceans and reservoirs. It can be occurs naturally over centuries as lakes age and filled in with sediments, or acid rain. However, it has been rapidly increasing caused by human activities like fertilizers, municipal sewage, and wastewater from the factory. The Baltic Sea is
평형수 관리협약
(BWM Convention 2004)
협약 원명 : International Convention for the Control and Management of Ship's Ballast Water and Sediments, 2004(선박의 평형수 및 침전물의 제어 및 관리에 관한 국제협약)
협약 채택 : 2004년 2월 13일
협약 발효 : 미발효(30개국 이상 비준하고 비준국의 세계선복량이 35% 이상일 때로부터 12개
lake tomorrow.
Sandy wants to show off
her dads new boat.
Why dont you come?
JACEY:
L...
I have to work.
I guess youll have
to write me a letter then.
JACEY:
What do you mean?
Ill be right back.
- Hi!
- Hi!
PAMELA: Nice tie.
- Thanks.
- Can I borrow a Kleenex?
- Greaser.
Got any smokes around here?
[DRUM ROLL]
[CLAPPING]
Ladies and gentlemen...
...Id like to propose a toast in honor of
our cause
1. 지원서-이력서
Eun Yong Kim
가. RESEARCH INTERESTS
• Joint and fault spacing and mechanisms for jointing and faulting
• Fracture characterization in aquifers and hydrocarbon reservoirs
• Poroelasticity and abnormal fluid pressure in sedimentary basins
• Crustal stress and deformation fields and their relationships to jointing, faulting, fluid migration