the light absorption spectra of ..
Chromoprotein-dependent and pigment-dependent modeling of spectral light-absorption in 2 dinoflagellates, prorocentrum-minimum and heterocapsa-pygmaea.
of in situ absorption and photosynthesis.
The light-dependent reactions starts within Photosystem II. When the excited electron reaches the special chlorophyll molecule at the reaction centre of Photosystem II it is passed on to the chain of electron carriers. This chain of electron carriers is found within the thylakoid membrane. As this excited electron passes from one carrier to the next it releases energy. This energy is used to pump protons (hydrogen ions) across the thylakoid membrane and into the space within the thylakoids. This forms a proton gradient. The protons can travel back across the membrane, down the concentration gradient, however to do so they must pass through ATP synthase. ATP synthase is located in the thylakoid membrane and it uses the energy released from the movement of protons down their concentration gradient to synthesise ATP from ADP and inorganic phosphate. The synthesis of ATP in this manner is called non-cyclic photophosphorylation (uses the energy of excited electrons from photosystem II) .
Using these data, it would seem that we need only to use a light source that mimics action or absorption spectra in order to promote photosynthesis in a manner.
Pigments and absorption spectra - UCMP
CO2’s bands of absorption are not broad enough to make any significant difference in the loss of heat once water vapor is removed from the picture. Any heat CO2 captures at or above that height would warm the surrounding air and increase the black body radiation of all of the components at that altitude, so the only net effect is a huge decrease of net emission in the CO2 absorption bands, with a corresponding increase across the remainder of the black body spectrum. in fact, that’s why satellites show the atmosphere as opaque for CO2 absorption bands, because the photon emission is insignificant compared to the black body radiation.
Photosynthesis and electromagnetic spectrum
Results of these experiments suggest that violet, blue, and red light with peaks away from the absorption maxima of carotenoids present in zooxanthellae are most efficient in the promotion of photosynthesis. See Table 9.
Water Absorption Spectrum - London South Bank …
In Argument 1, you write: “Don’t forget that there are windows in the IR spectrum with no absorption other water vapour allows easy extra energy loss through evaporation and IR emission.”
Shown opposite are the main vibrations occurring in liquid water
Light sources of different 'colors' produce different photosynthetic responses but these are not due to the quality of the light per se, but instead the absorption of violet and blue light by carotenoids (including -carotene,and xanthophylls diatoxanthin, diatoxanthin, and diadinoxanthin.) -carotene is known to transfer collected energy to chlorophyll and hence photosystem reaction centers, in an inefficient manner.