Results 71 to 80 of about 291,001 (382)

The ancient heritage of water ice in the solar system [PDF]

, 2014
Identifying the source of Earth's water is central to understanding the origins of life-fostering environments and to assessing the prevalence of such environments in space.
Alexander, Conel M. O'D., Bergin, Edwin A., Cleeves, L. Ilsedore, Du, Fujun, Graninger, Dawn, Harries, Tim J., Öberg, Karin I.   +6 more
core   +2 more sources

Injectable Dual‐Network Hydrogel System for Osteochondral Repair Combining Immunomodulation, Mechanical Adaptability, and Enhanced Tissue Integration

Advanced Functional Materials, EarlyView.
A UV‐triggered injectable dual‐network hydrogel is reported as the first application of bletilla striata polysaccharide (BSP) in osteochondral repair. By integrating methacrylamide‐modified BSP and nitrobenzaldehyde‐functionalized hyaluronic acid, the system achieves immunomodulation, mechanical reinforcement, and dynamic tissue adhesion, thereby ...
Jiaming Cui, Feifei Zhou, Yuan Luo, Tao Ouyang, Huiwu Zhang, Songmiao Cheng, Qiang Li, Xu Jiang, Yingying Yu, Yicheng Wang, Hong Ming   +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

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

Explosives Detection Using Deuterium-Deuterium Neutron Generator [PDF]

Journal of Nuclear Science and Technology, 2008
Gamma spectra of general and explosive materials were obtained by using the developed neutron induced prompt gamma-ray spectrometry system containing a neutron generator, where the neutron source was created from a deuterium-deuterium reaction, and they were examined to establish whether the samples were explosives or not by using the pattern ...
Hee-Jung Im, Byoung Chul Song, Yong Joon Park, Young Gu Cheun, Kyuseok Song, Won-Ho Kim   +5 more
openaire   +1 more source

Organometallic Precursor‐Induced Gradient Architecture on Multilayer Nanoporous Graphene Membranes for Precise Organic Solvent Nanofiltration

Advanced Functional Materials, EarlyView.
Alumina growth narrows surface pores and seals non‐selective defects, enhancing selectivity while preserving the nanoporous graphene architecture. Additionally, the deposition enables gradient‐controlled structural modification, with intergrown alumina acting as a physical cross‐linker that stabilizes the laminar structure.
Junhyeok Kang, Hwayong Lee, Suseong Hyun, Jiwon Kim, Ju Yeon Kim, Jeongyeob Oh, Yunseong Ji, Byungchan Han, Dae Woo Kim   +8 more
wiley   +1 more source

Comment on "A centroid molecular dynamics study of liquid para hydrogen and ortho deuterium" [J. Chem. Phys. 121, 6412 (2004)] [PDF]

, 2005
We show that the two phase points considered in the recent simulations of liquid para hydrogen by Hone and Voth lie in the liquid-vapor coexistence region of a purely classical molecular dynamics simulation.
Konieczny, Martin, Madden, Paul A., Manolopolous, David E., Miller, Thomas F., III, Oberhofer, Harald   +4 more
core  

The Deuterium-Burning Mass Limit for Brown Dwarfs and Giant Planets

, 2010
There is no universally acknowledged criterion to distinguish brown dwarfs from planets. Numerous studies have used or suggested a definition based on an object's mass, taking the ~13-Jupiter mass (M_J) limit for the ignition of deuterium.
Adam Burrows, Adelberger, Bakos, Barman, Boss, Burrows, Burrows, Burrows, Burrows, Burrows, Chabrier, Chabrier, Chabrier, Cyburt, David S. Spiegel, Guillot, Guillot, Hubeny, John A. Milsom, Lewis, Madhusudhan, Marcy, Marley, Mihalas, Prodanović, Sahrling, Saumon, Sharp, Spergel, Spiegel   +29 more
core   +1 more source

Atomic Deuterium Adsorbed on the Surface of Liquid Helium [PDF]

, 2000
We investigate deuterium atoms adsorbed on the surface of liquid helium in equilibrium with a vapor of atoms of the same species. These atoms are studied by a sensitive optical method based on spectroscopy at a wavelength of 122 nm, exciting the 1S-2P ...
A. I. Safonov, A. P. Mosk, A. P. Mosk, B. DeMarco, C. C. Bradley, C. C. Bradley, D. G. Fried, I. F. Silvera, I. F. Silvera, I. Shinkoda, K. B. Davis, M. E. Hayden, M. H. Anderson, M. W. Reynolds, M. W. Reynolds, O. J. Luiten, R. Mayer, T. Arai, T. W. Hijmans   +18 more
core   +2 more sources

Characterization of a deuterium–deuterium plasma fusion neutron generator [PDF]

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2018
We characterize the neutron output of a deuterium-deuterium plasma fusion neutron generator, model 35-DD-W-S, manufactured by NSD/Gradel-Fusion. The measured energy spectrum is found to be dominated by neutron peaks at 2.2 MeV and 2.7 MeV. A detailed GEANT4 simulation accurately reproduces the measured energy spectrum and confirms our understanding of ...
Lang, R. F., Pienaar, J., Hogenbirk, E., Masson, D., Nolte, R., Zimbal, A, Röttger, S., Benabderrahmane, M. L., Bruno, G   +8 more
openaire   +2 more sources