DOI: 10.1126/science.179142. Ion-Exchange in Melanin: An Electron Spin Resonance Study with Lanthanide Probes

Ion-Exchange in Melanin: An Electron Spin Resonance Study with Lanthanide Probes

10.1126/science.179142

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Changes are induced in the electron spin resonance signal amplitude and microwave power saturation of the naturally occurring free radical in melanin by bound paramagnetic ions. The changes serve as experimental observables in competition experiments between diamagnetic and paramagnetic metal ions for melanin binding sites and between melanin and ethylenediaminetetraacetic acid for paramagnetic metal ions. Evidence is presented for the existence of several specific types of metal binding sites. The interaction of copper with free radicals leading to loss of electron spin resonance signal amplitude is magnetic in nature and not, as has been supposed, chemical.

Bibliography

Sarna, T., Hyde, J. S., & Swartz, H. M. (1976). Ion-Exchange in Melanin: An Electron Spin Resonance Study with Lanthanide Probes. Science, 192(4244), 1132â1134.

Authors 3

T. Sarna (first)
James S. Hyde (additional)
Harold M. Swartz (additional)

References 15 Referenced 149

ABRAGAM, A, OVERHAUSER EFFECT IN NONMETALS, PHYSICAL REVIEW 98: 1729 (1955). (10.1103/PhysRev.98.1729) / PHYSICAL REVIEW (1955)
BLOEMBERGEN, N, ON THE INTERACTION OF NUCLEAR SPINS IN A CRYSTALLINE LATTICE, PHYSICA 15: 386 (1949). (10.1016/0031-8914(49)90114-7) / PHYSICA (1949)
BLOIS, M.S., ELECTRON SPIN RESONANCE STUDIES ON MELANIN, BIOPHYSICAL JOURNAL 4: 471 (1964). (10.1016/S0006-3495(64)86797-7) / BIOPHYSICAL JOURNAL (1964)
BRUENGER, F.W., INCORPORATION OF VARIOUS METAL IONS INTO IN VIVO- AND IN VITRO-PRODUCED MELANIN, RADIATION RESEARCH 32: 1 (1967). (10.2307/3572300) / RADIATION RESEARCH (1967)
COMMONER, B, FREE RADICALS IN BIOLOGICAL MATERIALS, NATURE 174: 689 (1954). (10.1038/174689a0) / NATURE (1954)
COTZIAS, G.C., MANGANESE IN MELANIN, NATURE 201: 1228 (1964). (10.1038/2011228a0) / NATURE (1964)
KAPITO, L.E., J INVEST DERMATOL 64: 342 (1975). (10.1111/1523-1747.ep12512284) / J INVEST DERMATOL (1975)
10.1126/science.121.3133.43
LAMAR G.N. NMR PARAMAGNETIC MOL (1973).
LEIGH, J.S., ESR-RIGID-LATTICE LINE SHAPE IN A SYSTEM OF 2 INTERACTING SPINS, JOURNAL OF CHEMICAL PHYSICS 52: 2608 (1970). (10.1063/1.1673348) / JOURNAL OF CHEMICAL PHYSICS (1970)
NICOLAUS R.A. MELANINS (1968).
PLUMER, J.I., PIGMENT CELL GROWTH: 305 (1953). / PIGMENT CELL GROWTH (1953)
SARNA, T, FOLIA HISTOCHEM CYTO 10: 265 (1972). / FOLIA HISTOCHEM CYTO (1972)
SIMONOVIC, K.K., NATURE 199: 1007 (1963). / NATURE (1963)
VALKOVIC, V, VARIATION IN TRACE METAL CONCENTRATIONS ALONG SINGLE HAIRS AS MEASURED BY PROTON-INDUCED X-RAY-EMISSION PHOTOMETRY, NATURE 243: 543 (1973). (10.1038/243543a0) / NATURE (1973)

Dates

Type	When
Created	18 years, 10 months ago (Oct. 5, 2006, 11:51 a.m.)
Deposited	1 year, 7 months ago (Jan. 11, 2024, 3:44 p.m.)
Indexed	1 month, 3 weeks ago (July 7, 2025, 7:45 a.m.)
Issued	49 years, 2 months ago (June 11, 1976)
Published	49 years, 2 months ago (June 11, 1976)
Published Print	49 years, 2 months ago (June 11, 1976)

Funders 0

None

BibTeX

@article{Sarna_1976, title={Ion-Exchange in Melanin: An Electron Spin Resonance Study with Lanthanide Probes}, volume={192}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.179142}, DOI={10.1126/science.179142}, number={4244}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Sarna, T. and Hyde, James S. and Swartz, Harold M.}, year={1976}, month=jun, pages={1132–1134} }

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