ELECTRON SPIN RESONANCE SPECTRA OF RIBOFLAVIN AND ITS COMPLEXES

Journal Article · Tue Oct 31 04:00:00 EST 1961 · Compt. rend. colloq. ampere, 9e colloq., Pise, 1960

OSTI ID:4011146

Sidran, M

The electron resonance spectrum of riboflavin-5phosphate and that of its complexes with tryptophan and serotonin was observed. In general, the spectra were of the gaussian form, with a beam length of about 25 gauss, and a g factor of 2.0040 plus or minus 0.0001. It was apparent that the signals were induced by light with intensities which are dependent on the presence of air and water. During a period in darkness following light irradiation, the signals decrease slowly to approximately 10% of the initial value at the end of four weeks. It was shown that the behavior of these systems in the presence of air is similar to that of the free radicals FMN in solution in the presence of oxygen. The signals observed can not be attributed to the triplet state of the riboflavin complexes, since this would cause broad signals of approximately 400 gauss. Two other possibilities are suggested, namely that the spectrum is due to free radicals or to photoconductivity effects. (tr-auth)

• Research Organization: Oak Ridge National Lab., Tenn.; and Staten Island Community Coll., N.Y.
• NSA Number: NSA-15-025836
• OSTI ID: 4011146
• Journal Information: Compt. rend. colloq. ampere, 9e colloq., Pise, 1960, Journal Name: Compt. rend. colloq. ampere, 9e colloq., Pise, 1960
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
AMINO ACIDS
BEAMS
BIOLOGY AND MEDICINE
ELECTRONS
FREE RADICALS
LIGHT
OXYGEN
PHOSPHATES
RESONANCE
RIBOFLAVIN
SEROTONIN
SOLUTIONS
SPECTRA
SPIN
TRYPTOPHAN
VITAMIN B-2
VITAMINS
WATER