Results 81 to 90 of about 702,145 (300)

The ionisation parameter of star-forming galaxies evolves with the specific star formation rate

open access: yes, 2018
We investigate the evolution of the ionisation parameter of star-forming galaxies using a high-redshift ($z\sim 1.5$) sample from the FMOS-COSMOS survey and matched low-redshift samples from the Sloan Digital Sky Survey.
Bian, Fuyan   +6 more
core   +1 more source

Photoelectrochemical water splitting: silicon photocathodes for hydrogen evolution [PDF]

open access: yes, 2010
The development of low cost, scalable, renewable energy technologies is one of today's most pressing scientific challenges. We report on progress towards the development of a photoelectrochemical water-splitting system that will use sunlight and water as
Boettcher, Shannon W.   +3 more
core   +1 more source

Dual PI3K/AKT and CDK4/6 inhibition reveals selective sensitivity in an SHH medulloblastoma stem cell model

open access: yesMolecular Oncology, EarlyView.
Targeted therapy was evaluated in SHH medulloblastoma using neuroepithelial stem cell (NES) and tumor‐derived NES‐like (tNES) models in 2D monolayers and 3D spheroids. PI3K, AKT, and CDK4/6 inhibitors had minimal effects in NES but markedly reduced viability and growth and induced apoptosis in tNES cells, revealing distinct therapeutic vulnerabilities.
Monika Lukoseviciute   +4 more
wiley   +1 more source

Self-modulated hydrogen electrocatalysis on sub-2-nm platinum nanoparticles by in situ generated surface hydrides

open access: yesNature Communications
Revealing the surface structure evolution under working conditions is crucial for understanding the activity and stability of electrocatalysts. Platinum, the state-of-the-art electrocatalyst for hydrogen oxidation in fuel cells or hydrogen evolution in ...
Liang Chang   +8 more
doaj   +1 more source

Vertically Aligned Ultrathin 1T-WS2 Nanosheets Enhanced the Electrocatalytic Hydrogen Evolution

open access: yesNanoscale Research Letters, 2018
Efficient evolution of hydrogen through electrocatalysis holds tremendous promise for clean energy. The catalytic efficiency for hydrogen evolution reaction (HER) strongly depends on the number and activity of active sites. To this end, making vertically
Qunying He   +3 more
doaj   +1 more source

Rare White dwarf stars with carbon atmospheres

open access: yes, 2007
White dwarfs represent the endpoint of stellar evolution for stars with initial masses between approximately 0.07 msun and 8-10 msun, where msun is the mass of the Sun (more massive stars end their life as either black holes or neutron stars). The theory
Behara, N.   +3 more
core   +2 more sources

Helium Atmospheres on Warm Neptune- and Sub-Neptune-Sized Exoplanets and Applications to GJ 436 b [PDF]

open access: yes, 2015
Warm Neptune- and sub-Neptune-sized exoplanets in orbits smaller than Mercury's are thought to have experienced extensive atmospheric evolution. Here we propose that a potential outcome of this atmospheric evolution is the formation of helium-dominated ...
Hu, Renyu, Seager, Sara, Yung, Yuk L.
core   +3 more sources

CoP for hydrogen evolution: implications from hydrogen adsorption

open access: yesPhysical Chemistry Chemical Physics, 2016
Synergistic adsorption of hydrogen atoms on Co and P sites of CoP(111) leads to a nearly neutral free energy of adsorption that is highly conductive to hydrogen evolution.
Guoxiang, Hu, Qing, Tang, De-En, Jiang
openaire   +3 more sources

Hydrogen evolution by a metal-free electrocatalyst [PDF]

open access: yesNature Communications, 2014
Electrocatalytic reduction of water to molecular hydrogen via the hydrogen evolution reaction may provide a sustainable energy supply for the future, but its commercial application is hampered by the use of precious platinum catalysts. All alternatives to platinum thus far are based on nonprecious metals, and, to our knowledge, there is no report about
Zheng, Y.   +8 more
openaire   +5 more sources

CCDC80 suppresses high‐grade serous ovarian cancer migration via negative regulation of B7‐H3

open access: yesMolecular Oncology, EarlyView.
PAX8 is a lineage‐specific master regulator of transcription in high‐grade serous ovarian cancer (HGSC) progression. We show for the first time that PAX8 facilitates proliferation and metastasis by repressing the cell autonomous tumor suppressor CCDC80 and inducing B7‐H3 expression.
Aya Saleh   +12 more
wiley   +1 more source

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