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41.
L. O. BJÖRN 《Photochemistry and photobiology》1971,13(1):5-20
Abstract— –Small amounts of N -methyl phenazonium methosulphate (PMS) added to a suspension of Chlorella pyrenoidosa accelerate the emission of the long-lived far-red induced afterglow without greatly changing the amount of light emitted. The effect is noticeable in dilute suspensions at a PMS concentration of 10-9 M. The concept of afterglow unit is introduced and defined as that part of the sample in which the rate of energy reemission can be controlled by a single molecule of PMS. The number of chlorophyll molecules per afterglow unit is about 105 . It is possible that the afterglow unit is identical to the thylakoid.
The rate constant for the final first order decay phase of afterglow at room temperature is about 0.7 min-1 without PMS and about 3 times larger for a unit with one PMS molecule.
Diuron (DCMU) lowers the rate of afterglow decay. Desaspidin on the other hand decreases the amount of light emitted without affecting the decay rate. Carbonylcyanide- m -chlorophenyl hydrazone (CCCP) decreases the afterglow over the whole time-range and increases the decay rate. A kinetic model is developed to account for the results. 相似文献
The rate constant for the final first order decay phase of afterglow at room temperature is about 0.7 min
Diuron (DCMU) lowers the rate of afterglow decay. Desaspidin on the other hand decreases the amount of light emitted without affecting the decay rate. Carbonylcyanide- m -chlorophenyl hydrazone (CCCP) decreases the afterglow over the whole time-range and increases the decay rate. A kinetic model is developed to account for the results. 相似文献
42.
RN Mohapatra 《Pramana》2000,55(1-2):289-296
It is shown that if the supersymmetric Standard Model (MSSM) emerges as the low energy limit of a high scale left-right symmetric
gauge structure, the number of uncontrollable CP violating phases of MSSM are drastically reduced. In particular it guarantees
the vanishing of the dangerous phases that were at the root of the so called SUSY CP problem. Such a symmetric gauge structure
is independently motivated by the smallness of neutrino masses that arise via seesaw mechanism automatic in the theory. The
minimal version of this theory also provides an explanation of the smallness of ε′/ε as a consequence of the high scale parity
invariance.
This talk is based on work done in collaboration with K S Babu and B Dutta. 相似文献