Hydrogen fuel cells power the shuttle's electrical systems, producing a clean byproduct-pure water, which the crew drinks. A fuel cell combines hydrogen and oxygen to produce electricity, heat, and water. Fuel cells are often compared to batteries. Both convert the energy produced by a chemical reaction into usable electric power. However, the fuel cell will produce electricity as long as fuel (hydrogen) is supplied, never losing its charge.
Chlorophyll b is a form of chlorophyll. Chlorophyll b helps in photosynthesis by absorbing light energy. It is more soluble than chlorophyll a in polar solvents because of its carbonyl group. Its color is yellow, and it primarily absorbs blue light.n land plants, the light-harvesting antennae around photosystem II contain the majority of chlorophyll b. Hence, in shade-adapted chloroplasts, which have an increased ratio of photosystem II to photosystem I, there is a lower ratio of chlorophyll a to chlorophyll b.
In Biology. Chlorophyll is a green pigment found in cyanobacteria and  chloroplasts of algae and plants which is an important biochemical  for photosynthesis. It appears green because i â¦ t is a poor absorber  of green and near-green portions of the spectrum.he â¦ light energy is then carried through the antenna complex to the reaction center, which is composed entirely of chlorophyll A. It is in the reaction center that the light energy is used to excite electrons before they enter the electron transport chain. 3 people found this useful. Answered.