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.
No. Light is needed only in the light stage when, at Photosystems I & II (which contain chlorophyll) light is absorbed and results in the production of ATP and NADPH. These two compounds are used in the light independent stage (Calvin Cycle) to fix CO2.