Accession Number : AD0769386

Title :   Stress Biophysics: Time Resolution of Two Phosphorescences in Rat Tail Tendon.

Descriptive Note : Rept. no. 1 (Annual) 1 Nov 72-31Oct 73,

Corporate Author : AMERICAN DENTAL ASSOCIATION CHICAGO ILL DIV OF BIOPHYSICS

Personal Author(s) : Hoerman,Kirk C.

Report Date : 31 OCT 1973

Pagination or Media Count : 27

Abstract : Phosphorescence of powdered monomeric polypeptide chains of collagen was induced by ultraviolet light at 277 nm. The emission was single-banded (half band width of approx- 30 nm) with a peak at 385 nm. Powered human glycoprotein, when excited at 277 nm, displayed a phosphorescent spectrum principally due to tryptophan residues (peaks at 413, 434 and 470 nm). The relative phosphorescent efficiency of glycoprotein was 4 times that of collagen. Washed tendon from rat tails, excited at 280 nm, and viewed at 425 nm, showed spectra suggesting the presence of two discrete excited triplet states functioning without interaction. (Modified author abstract).

Descriptors :   (*Phosphorescence, *Tendons), Connective tissue, Musculoskeletal system, Luminescence, Biophysics, Cryogenics, Computers

Subject Categories : Biochemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE