The linear mass density can then be understood as the derivative of the mass function with respect to the one dimension of the rod (the position along its length =) The SI unit of linear mass density is the kilogram per meter (kg/m). Linear density of fibers and yarns can be measured by many methods.
An Arabidopsis thaliana chlorophyll(ide) a oxygenase gene (cao), which is responsible for chlorophyll b synthesis from chlorophyll a, was introduced and expressed in a photosystem I-less strain of the cyanobacterium Synechocystis sp.
Confidence votes 63. I have studied photosyn. and to the best of my knowledge chl. a and b are in both photosystems. The difference between absorption in photosystem II (p680) and I (p700) is caused by the amount of a (best at 450-500nm) or b (best at 470-600nm).Photosyn.