Results 91 to 100 of about 274,158 (325)

The pronounced seasonality of global groundwater recharge

Water Resources Research, 2014
Groundwater recharged by meteoric water supports human life by providing two billion people with drinking water and by supplying 40% of cropland irrigation.
Scott Jasechko, S. Jean Birks, Tom Gleeson, Yoshihide Wada, Peter J. Fawcett, Zachary D. Sharp, Jeffrey J. McDonnell, Jeffrey M. Welker   +7 more
doaj   +1 more source

Détection de la chaptalisation des vins : constitution d'une base de données

OENO One, 1994
Afin de détecter la chaptalisation des vins, il est nécessaire de constituer une base de données pour pouvoir comparer les valeurs obtenues par résonance magnétique nucléaire quantitative du deutérium et par spectrométrie de masse des rapports ...
Sylvie Giraudon
doaj   +1 more source

Time-dependent effect of deuterium depletion on tumor growth and metastasis

Russian Open Medical Journal, 2020
Objective ― impact of different time regimens of deuterium depletion on progression of syngeneic grafted tumor in mice was investigated. Material and Methods ― Experiment was performed on 64 C57Bl/6 mice divided into two groups with substitution of ...
Natalia V. Yaglova, Sergey S. Obernikhin, Valentin V. Yaglov, Svetlana V. Nazimova   +3 more
doaj   +1 more source

Hydrogelation via Supramolecular Copolymerization of Structural Water within Adaptive Metal–Organic Fibers

Advanced Materials, EarlyView.
Structural water is harnessed as an active co‐monomer to drive supramolecular polymerization in bulk water. Zinc(II) Salphen complexes confine water molecules to form hollow, metal–organic nanofibers that assemble into adaptive hydrogels with thermoresponsive mechanics and selective chiral recognition.
Merlin R. Stühler, Hesam Makki, Tarek Hilal, Debsena Chakraboty, Mathias Dimde, Kai Ludwig, Rainer Haag, Sabine Rosenfeldt, Dorothee Silbernagl, Andreas Schäfer, Alex J. Plajer   +10 more
wiley   +1 more source

Seasonal Enhancement in Upper Atmospheric D/H at Mars Driven by Both Thermospheric Temperature and Mesospheric Water

Geophysical Research Letters
The D/H ratio in water on Mars, Rwater, is 4–6× the Earth ratio, signifying past water loss to space. Recently, measurements have revealed high values of the D/H ratio in hydrogen, Ratomic, in the thermosphere during southern summer.
E. M. Cangi, M. S. Chaffin, R. V. Yelle, B. S. Gregory, J. Deighan   +4 more
doaj   +1 more source

Identification of Summer Origins of Songbirds Migrating through Southern Canada in Autumn

Avian Conservation and Ecology, 2006
Stable hydrogen isotopes (δD) in flight feathers were measured to investigate the summer origins of five species of boreal-breeding warblers captured during fall migration at Canadian Migration Monitoring Network (CMMN) stations spread across southern ...
Erica H. Dunn, Keith A. Hobson, Len I. Wassenaar, David J. T. Hussell, Martha L. Allen   +4 more
doaj   +1 more source

The N2D+/N2H+ ratio as an evolutionary tracer of Class 0 protostars

, 2008
Deuterated ions are abundant in cold (T=10 K), dense (n=10^5 cm^-3) regions, in which CO is frozen out onto dust grains. In such environments, the deuterium fractionation of such ions can exceed the elemental abundance ratio of D/H by a factor of 10^4 ...
Adams, Aikawa, Aikawa, Alves, André, André, Bacmann, Bergin, Bergin, Bernes, Bisschop, Boogert, Caselli, Caselli, Caselli, Caselli, Ceccarelli, Ceccarelli, Cernis, Crapsi, Crapsi, Dalgarno, Daniel, Enoch, Evans, Flower, Flower, Fontani, Fontani, Fred, Frerking, Froebrich, Froebrich, Fuller, Gerlich, Gueth, Hatchell, Hatchell, Herbig, J. Stutzki, Jørgensen, Kirk, Kramer, Kramer, Kwon, Lacy, Lada, Looney, Looney, M. C. Wiedner, M. Emprechtinger, Mardones, Mardones, Maret, Matthews, Millar, Myers, Myers, N. H. Volgenau, O'Linger, Oliveira, P. Caselli, Pagani, Parise, Pineda, Rawlings, Redman, Roberts, Roberts, Roberts, Saraceno, Schnee, Shu, Smith, Tafalla, Tafalla, Tafalla, Terebey, van der Tak, Velusamy, Visser, Volgenau, Ward-Thompson, Willacy, Wilson, Womack, Öberg   +86 more
core   +2 more sources

Predicting Big Bang Deuterium [PDF]

, 1994
We present new upper and lower bounds to the primordial abundances of deuterium and helium-3 based on observational data from the solar system and the interstellar medium. Independent of any model for the primordial production of the elements we find (at
Hata, N., Scherrer, R. J., Steigman, G., Thomas, D., Walker, T. P.   +4 more
core   +2 more sources

Oxygen‐Inhibition Driven Compartmentalization of Dextran Microgels: Toward Fusible Colloidal Biomaterial Inks for 3D Printing

Advanced Materials, EarlyView.
Harnessing oxygen inhibition as a materials design principle enables the universal fabrication of core–shell microgels with tunable radial crosslinking gradients. This conceptually simple yet highly versatile strategy generates fusible colloidal bioinks that combine structural hierarchy with adaptive porosity.
Selin Bulut, Thomas Bissing, Tudor Lile, Hannah Küttner, Daniel Günther, Cédric Bergerbit, Dan Eugen Demco, Laura De Laporte, Andrij Pich   +8 more
wiley   +1 more source

Corrections to deuterium hyperfine structure due to deuteron excitations

, 2003
We consider the corrections to deuterium hyperfine structure originating from the two-photon exchange between electron and deuteron, with the deuteron excitations in the intermediate states. In particular, the motion of the two intermediate nucleons as a
A. Bohr, A. C. Zemach, A. I. Milstein, A. I. Milstein, D. A. Greenberg, D. J. Wineland, F. E. Low, F. E. Low, F. E. Low, G. T. Bodwin, I. B. Khriplovich, M. Gell-Mann, N. F. Ramsey, R. P. Feynman   +13 more
core   +2 more sources