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.
Chlorophyll a is present in all photosynthetic organisms and is the green photosynthetic pigment. Chlorophyll b is an accessory pigment and absorbs different pigments than a. A absorbs energy from mostly blue-violet and orange-red wavelengths.B absorbs some energy from the green wavelengths.Source(s): http://www.chm.bris.ac.uk/motm/chlorophy...hlorophyll b is an accessory pigment and absorbs different pigments than a. A absorbs energy from mostly blue-violet and orange-red wavelengths.