Results 171 to 180 of about 6,130 (225)

Natural abundance O17 and S33 nuclear magnetic resonance spectroscopy in solids achieved through extended coherence lifetimes

Physical review B, 2019
We have found that the NMR coherence lifetime T 2 of the symmetric central ( ± 12 → ∓ 12 ) transition for 17 O nuclei through a π pulse train can be extended by over two orders of magnitude in a lattice dilute with NMR active nuclei through the use of ...
Daniel Jardón-Álvarez, Mark O. Bovee, J. Baltisberger, P. Grandinetti   +3 more
semanticscholar   +1 more source

Covalent distribution of spin in V2O3:O17 nuclear resonance

Solid State Communications, 1974
Abstract O 17 nuclear magnetic resonance has been observed in metallic V 2 O 3 with frequency shifts from (−0.10 ± 0.02)-(−0.05 ± 0.02) per cent between 170 and 460°K respectively, a linewidth of 37 ± 5 oe and spin-lattice relaxation rate 1/ T 1 ≈ 60 sec −1 at 296°K. From these quantities, covalency parameters f s /2 S = − 0.35 × 10 −3 and
A.C. Gossard, J.P. Remeika
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On the negative parity states of O17, O18 and F19

Physics Letters, 1963
Theoretical explanation of the negative parity states in the (2s,1d) shell and their apparent collective properties were discussed. The initial results of calculations on the negative parity states of O/sup 17/, O /sup 18/, and F/sup 19/ were presented. The work was based on a shell model that explained these properties. (C.E.S.)
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Thermonuclear reaction rate of O17(p,γ)F18

2005
The O17(p,γ)F18 and O17(p,α)N14 reactions have a profound influence on hydrogen-burning nucleosynthesis in a number of stellar sites, including red giants, asymptotic giant branch (AGB) stars, massive stars, and classical novae. Previously evaluated thermonuclear rates for both reactions carry large uncertainties.
Longland, R., Newton, J., Fitzgerald, R.P., Champagne, A.E., Runkle, R., Fox, C., Iliadis, C., Pollanen, J.   +7 more
openaire   +1 more source

The O17(t, p)O19 reaction in a nuclear reactor

Nuclear Physics, 1962
Abstract By using tritons from pile irradiated Li 6 , the reaction O 17 (t, p)O 19 was observed. The thick target yield at E t ≦2.73 MeV was measured. The effective cross section of the reaction was evaluated and found to be 34±7mb.
R. Moreh, G. Davis
openaire   +1 more source

O17: Validation of a Food Behavior Checklist for Spanish Speakers

Journal of Nutrition Education and Behavior, 2008
Outcome Measures and Analysis: Three components were evaluated: 1) FFQ computer program, 2) final set of food photos, and 3) future improvements of the FFQ. Frequency counts and percentages were used in data analysis. Results: Seventy-five percent of participants considered the FFQ computer program “very easy to use”.
Jinan Banna, Marilyn Townsend, Lucia Kaiser, Luz Elvia Vera Becerra, Kathryn Sylva, Sharon Sugerman, Diane Metz, Yvonne Nicholson   +7 more
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O17 Identification and characterisation of phytochemicals activating endogenous cytoprotective mechanisms

Biochemical Pharmacology, 2017
Improved health span and lifespan extension in a wide phylogenetic range of species is associated with upregulation of the environmental stress response (ESR). The ESR, driven by the transcription factor Nrf2, provides endogenous antioxidant defence to maintain intracellular redox balance.
Jennifer Harbottle, Andreas Kolb
openaire   +1 more source

Lifetimes of the first excited states of B10, O17 and F17 (I)

Nuclear Physics, 1962
Abstract The lifetimes of the first excited states of B10 ,O17 and F17 have been measured by the delayed coincidence method using a pulsed beam. The measured mean lives are: (1.00±0.03) × 10−9 sec (B16), (4.30±0.21) × 10−10 sec (O17) and (4.29±0.22) × 10−19 sec (F17). The chief theoretical treatments of quadrupole enhancement are reviewed, and their
N.H Gale, J.B Garg, J.M Calvert
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O17 Transforming sexual health systems through online services

Sexually Transmitted Infections, 2017
IntroductionOnline sexual health services can transform sexual health systems through increased access and self-management. They are one element of the whole sexual health economy. Best practice facilitates appropriate movement of users between online and clinic services according to their sexual health need.MethodsUsing routinely collected, anonymised
Paula Baraitser, Katherine Turner, Michael Brady, Joia de Sa, Jonathan Syred, Chris Howroyd, Gillian Holdsworth   +6 more
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MPEC 2025-O17 : 2025 OK

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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