Biological applications of spin exchange

Journal Article · Thu Jan 01 04:00:00 EST 1976 · ACS Symp. Ser.; (United States)

DOI:https://doi.org/10.1021/bk-1976-0034.ch034· OSTI ID:6549798

Keith, A D; Snipes, W

The physical concept of and considerable experimental data dealing with the events that lead to close encounter dependent broadening of the N-hyperfine lines of nitroxides have been treated by several authors. This report presents the phenomena limiting line broadening due to spin--spin interactions and treats biological applications. The concentration dependencies of the interactions between spin labels and other spin labels, paramagnetic ions, and paramagnetic chelates are presented. The line broadening efficiencies are compared. The effects of solvent viscosity and charge-charge interactions with respect to both interactions between spin labels and spin labels with other charged paramagnetic agents are treated. Collisional frequency in porous beads is treated in terms of diffusion barriers. Biological applications are presented showing restriction of molecular motion of spin labels dissolved in the aqueous interior of cells. The phenomenon of increased restriction to spin label motion accompanying specific causes of cell death is treated.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 6549798
• Journal Information: ACS Symp. Ser.; (United States), Journal Name: ACS Symp. Ser.; (United States) Vol. 34; ISSN ACSMC
• Country of Publication: United States
• Language: English

Related Subjects

550300* -- Cytology
59 BASIC BIOLOGICAL SCIENCES
ANGULAR MOMENTUM
BIOCHEMISTRY
BIOLOGICAL EFFECTS
BIOLOGY
BIOPHYSICS
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
COUPLING
CYTOLOGY
INTERMEDIATE COUPLING
IONS
J-J COUPLING
MAGNETIC RESONANCE
MOLECULAR BIOLOGY
MOLECULAR IONS
MOLECULAR STRUCTURE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLE PROPERTIES
RESONANCE
SPIN
USES