English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Proton and Deuteron spin - lattice relaxation have been measured in aqueous solutions of herring sperm DNA as a function of concentration, temperature, and NMR frequency. We find a minimum if the increment of the relaxation rates, 1/T 1 -1/T 1  (free solvent) is plotted as a function of the inverse temperature. The result can be understood by assuming a superposition of two exchange processes: a very rapid exchange of water molecules causes the rate increment at lower temperatures whereas the frequency dependent rate increment in the high temperature region is caused by slow exchange of bound water molecules or DNA protons. The correlation time or the exchange time of the fast exchanging water molecules is smaller than 10 -9  s at 4  0 C with an activation energy of 7.2 kcal/mole, whereas the slowly exchanging water molecules or DNA protons have at the same temperature a correlation time of more than 10 -7  s with an activation energy of 9,8 kcal/mole and an exchange time of 1 s with an activation energy of 11.5 kcal/mole.

zeitschrift für naturforschung c

Untersuchung der longitudinalen Kernspinrelaxation in konzentrierten Lösungen von Heringsspermien - DNA zur Frage des an DNA gebundenen Wassers / Spin-Lattice Relaxation in Concentrated Solutions of Hering-Sperm DNA and the Problem of Water Bound to DNA