Results 121 to 130 of about 4,584,056 (379)

Primordial Star Formation under Far-ultraviolet radiation

, 2000
Thermal and chemical evolution of primordial gas clouds irradiated with far-ultraviolet (FUV; < 13.6 eV) radiation is investigated. In clouds irradiated by intense FUV radiation, sufficient hydrogen molecules to be important for cooling are never formed.
Black J. H., Borysow A., Carlberg R. G., de Jong T., Doroshkevich A. G., Galli D., John T. L., Kashlinsky A., Kazuyuki Omukai, Kompaneets A. S., Larson R. B., Penston M. V., Yoneyama T.   +12 more
core   +2 more sources

Modeling Pressure-Ionization of Hydrogen in the Context of Astrophysics [PDF]

, 1999
The recent development of techniques for laser-driven shock compression of hydrogen has opened the door to the experimental determination of its behavior under conditions characteristic of stellar and planetary interiors.
Celliers P. M., Collins G. W., D. J. Wagner, D. Saumon, G. Chabrier, Guillot T., X. Xie   +6 more
core   +3 more sources

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Hydrogen Production Using Electrodeposited Ni and Ni/Co on Carbon Paper as Cathode Catalyst in Microbial Electrolysis Cells

International Journal of Electrochemical Science, 2018
Microbial electrolysis cells (MECs) utilize microorganisms to decompose organic matter in wastewater and produce hydrogen at the cathode. Thus, a low-cost and highly active cathode material is of great important in such system.
Yuxue Wang, Yu Zhao, Ailian Wu, Zhishuai Dong, Jia Li, Junwen Wang   +5 more
doaj   +1 more source

All-sky signals from recombination to reionization with the SKA

, 2015
Cosmic evolution in the hydrogen content of the Universe through recombination and up to the end of reionization is expected to be revealed as subtle spectral features in the uniform extragalactic cosmic radio background.
Pritchard, Jonathan, Shankar, N. Udaya, Subrahmanyan, Ravi, Vedantham, Harish K.   +3 more
core   +1 more source

Production of atomic hydrogen by cosmic rays in dark clouds [PDF]

, 2018
The presence of small amounts of atomic hydrogen, detected as absorption dips in the 21 cm line spectrum, is a well-known characteristic of dark clouds.
Caselli, Paola, Ferrara, Andrea, Galli, Daniele, Ivlev, Alexei V., Padovani, Marco   +4 more
core   +2 more sources

Dammarenediol II enhances etoposide‐induced apoptosis by targeting O‐GlcNAc transferase and Akt/GSK3β/mTOR signaling in liver cancer

Molecular Oncology, EarlyView.
Etoposide induces DNA damage, activating p53‐dependent apoptosis via caspase‐3/7, which cleaves PARP1. Dammarenediol II enhances this apoptotic pathway by suppressing O‐GlcNAc transferase activity, further decreasing O‐GlcNAcylation. The reduction in O‐GlcNAc levels boosts p53‐driven apoptosis and influences the Akt/GSK3β/mTOR signaling pathway ...
Jaehoon Lee, Byung‐Cheol Han, Gi‐Bang Koo, Jihye Park, Mijin Kwon, Young Bin Park, Jae‐Mun Choi, Seung‐Ho Lee, Sangho Roh   +8 more
wiley   +1 more source

Facile Synthesis of Well-Dispersed Ni₂P on N-Doped Nanomesh Carbon Matrix as a High-Efficiency Electrocatalyst for Alkaline Hydrogen Evolution Reaction

Nanomaterials, 2019
The development of non-noble metal hydrogen evolution catalysts that can replace Pt is crucial for efficient hydrogen production. Herein, we develop a type of well-dispersed Ni2P on N-doped nanomesh carbon (NC) electrocatalyst by a facile pyrolysis ...
Fan Yang, Shuo Huang, Bing Zhang, Liqiang Hou, Yi Ding, Weijie Bao, Chunming Xu, Wang Yang, Yongfeng Li   +8 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Study of the influence of phosphoric acid in steel anaerobic corrosion via the hydrogen evolution reaction. [PDF]

, 2007
Although it is well known that the phosphate species are quiet electrochemically inert when considering their calculated redox potential, few studies since the end of 80’s reported electrochemical phenomenon observed in the reduction domain which were ...
Basséguy, Régine, Bergel, Alain, De Silva Munoz, Leonardo   +2 more
core