QUANTUM RELATIONS IN PHOTOREACTIVATION OF COLPIDIUM

Quantum Relations in Photoreactivation of Colpidium

1. The amount of visible or long ultraviolet light (UV) required to photoreactivate Colpidium colpoda injured with known dosages of short UV (2654 A) was determined. 2. The effect of the short UV was tested by the delay in division of exposed animals compared to controls. Photoreactivation was tested by the effect of postillumination on the delay of division of treated colpidia compared to cont...

Clxii. Allelocatalytic Effect in Cultures of Colpidium

Photoreactivation in humans.

Photoreactivation is a DNA repair pathway that requires the presence of a photoreactivating enzyme, DNA photolyase. DNA photolyase recognizes and binds specifically to ultraviolet radiation (UVR)-induced cyclobutane pyrimidine dimers in DNA. Exposure of the photolyase-dimer complex to wavelengths in the range of 300-500 nm results, upon absorption of a photon, in the return of the dimerized pyr...

Photoreactivation in airborne Mycobacterium parafortuitum.

Photoreactivation was observed in airborne Mycobacterium parafortuitum exposed concurrently to UV radiation (254 nm) and visible light. Photoreactivation rates of airborne cells increased with increasing relative humidity (RH) and decreased with increasing UV dose. Under a constant UV dose with visible light absent, the UV inactivation rate of airborne M. parafortuitum cells decreased by a fact...

Associativity Relations in Quantum Cohomology

We describe interdependencies among the quantum cohomology associativity relations. We strengthen the first reconstruction theorem of Kontsevich and Manin by identifying a subcollection of the associativity relations which implies the full system of WDVV equations. This provides a tool for identifying non-geometric solutions to WDVV.