Tubular type
Advantage: do not need air sealing & formed on strong support ->mechanical property is great & resistance from heat is great
Disadvantage: power density is small
Economical characteristic
Do not use expansive catalyst
Do not need reforming
Do not need electrolyte supplement
Price is cheaper than others
Technical characteristic
simple process caused by various
1.Introduction
A fuel cell is a device that converts the chemical energy of a fuel (hydrogen, natural gas, methanol, gasoline, etc.) and an oxidant (air or oxygen) into electricity. A fuel cell operates like a battery. However, a fuel cell does not require recharging, it produces electricity and heat as long as fuel and an oxidizer are supplied.
Fuel cell construction generally consists
relatively new kinds of collectibles may actually appreciate faster as short-term investments, but may not hold their value as long-term investments. Once a collectible has had its initial play, it appreciates at a fairly steady rate, supported by an increasing number of enthusiastic collectors competing for the limited supply of collectibles that become increasingly more difficult to locate.
tubular greenstone beads, and pit-houses with rounded plan-shapes.
Rounded pit-houses similar with those of Songguk-ri were later found
at other archaeological sites along with a suite of other co-occurring
artifacts prompting archaeologists to use Songguk-ri as the type site
for Middle Mumun culture and label features and artifacts from there and
other Middle Mumun sites a
Repeat biopsy at 6 monthes
: Strong predictor of ESRD
- ongoing inflamations with cellular crescent, macrophages in the tubular lumens, immune deposits
Membraneous > Proliferative
Pure membranous > Superimposed Proliferative lesions( Class III + V , Class IV +V)
- 72% 10-year survival rates vs 20-48% 10-year survival rates
aggressive treatment to avoid irrevers