Results 11 to 20 of about 2,058,598 (234)

Molecular hydrogen in damped Ly-alpha systems: clues to interstellar physics at high-redshift

, 2004
In order to interpret H2 (molecular hydrogen) quasar absorption line observations of damped Ly-alpha systems (DLAs) and sub-DLAs, we model their H2 abundance as a function of dust-to-gas ratio, including H2 self-shielding and dust extinction against ...
Ferrara, A., Hirashita, H.
core   +1 more source

Heavy hydrogen in the stratosphere [PDF]

, 2003
We report measurements of the deuterium content of molecular hydrogen (H2) obtained from a suite of air samples that were collected during a stratospheric balloon flight between 12 and 33 km at 40º N in October 2002. Strong deuterium enrichments of up to
Engel, Andreas, Rhee, Tae Siek, Röckmann, Thomas   +2 more
core   +4 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Effect of the benzyl groups on the binding of H2 by three-coordinated Ti complexes

, 2010
Using first-principles calculations, we investigate the adsorption of H2 molecules on a three-coordinated benzyl-decorated titanium complex suggested in a recent experiment [Hamaed et al., J. Am. Chem. Soc. 130, 6992 (2008)]. Unlike the interpretation of
Lee, Hoonkyung
core   +1 more source

Molecular hydrogen in high-redshift Damped Lyman-alpha systems: The VLT/UVES database [PDF]

, 2008
We present the current status of ongoing searches for molecular hydrogen in high-redshift (1.8 < zabs = 20 and z_abs > 1.8, which have data that include redshifted H2 Lyman and/or Werner-band absorption lines.
Akerman, Ballester, Beaver, Boissé, C. Ledoux, Carswell, Cui, Curran, Foltz, Fox, Fox, Fynbo, Ge, Ge, Gillmon, Grevesse, Haehnelt, Heinmüller, Hirashita, Hirashita, Hou, Jakobsson, Lanzetta, Ledoux, Ledoux, Ledoux, Ledoux, Levshakov, Levshakov, Levshakov, Lowrance, Lu, Morton, Murphy, Noterdaeme, Noterdaeme, P. Noterdaeme, P. Petitjean, Petitjean, Petitjean, Petitjean, Prochaska, Prochaska, Prochaska, Prochaska, Prochaska, R. Srianand, Reimers, Savage, Schaye, Smith, Snow, Srianand, Srianand, Srianand, Tumlinson, Varshalovich, Viegas, Vladilo, Vladilo, Vladilo, Wakker, Wolfe, Wolfe, Wolfe, Wolfe, Wright, Zwaan   +67 more
core   +4 more sources

Mechanisms of IgE‐mediated food allergy and the role of allergen‐specific B cells

FEBS Letters, EarlyView.
Food allergy arises when allergen‐specific B cells preferentially produce immunoglobulin E (IgE) antibodies against harmless foods. This article explains the mechanisms driving IgE‐mediated reactions, highlights the central role of these B cells, and discusses how natural tolerance (NT) and oral immunotherapy (OIT) can reshape allergic immune responses.
Juan‐Felipe López, Özge Yilmaz Ardicli, Mübeccel Akdis   +2 more
wiley   +1 more source

Down‐regulation of Shh in the hair follicles of mice during chemotherapy‐induced hair loss is mediated by the JAK/STAT1 signaling pathway

FEBS Open Bio, EarlyView.
We found that during chemotherapy‐induced alopecia (CIA), Sonic hedgehog (Shh) expression significantly decreased in hair follicle Shh+ cells, whereas the Janus‐activated kinase/signal transducer and activator of transcription 1 (JAK/STAT1) signaling pathway was markedly activated.
Ruifang Fan, Jingling Huang, Xiang Lin, Tingjiao Lan, Yuli Tang, Ling Sun, Guixuan Zhou   +6 more
wiley   +1 more source

A proposal for climate stability on H2-greenhouse planets

, 2015
A terrestrial planet in an orbit far outside of the standard habitable zone could maintain surface liquid water as a result of H2-H2 collision-induced absorption by a thick H2 atmosphere.
Abbot, Dorian S.
core   +1 more source

Variably Protease‐Sensitive Prionopathy: Two New Cases With Motor Neuron‐Dementia Syndrome

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT We describe two patients with variably protease‐sensitive prionopathy (VPSPr) who developed progressive upper motor neuron symptoms, insomnia, behavioral and cognitive decline, compatible with primary lateral sclerosis associated with frontotemporal dementia (FTD).
María Elena Erro, María Victoria Zelaya, Hasier Eraña, Javier Sánchez Ruiz de Gordoa, Fermín García‐Amigot, Anika Simonovska‐Serra, María Cristina Caballero, Isidre Ferrer, Ellen Gelpi, Ivonne Jericó, Joaquín Castilla   +10 more
wiley   +1 more source

Formation Pumping of Molecular Hydrogen in Dark Clouds

, 2010
Many theoretical and laboratory studies predict H2 to be formed in highly excited ro-vibrational states. The consequent relaxation of excited levels via a cascade of infrared transitions might be observable in emission from suitable interstellar regions.
Abgrall, Abgrall, Abgrall, Casu, Cesare Cecchi-Pestellini, Congiu, Dalgarno, Duley, Duley, Farahjabeen Islam, Fitzpatrick, Flower, Flower, Flower, Gough, Parneix, Serena Viti, Silvia Casu, Takahashi, Takahashi, Takahashi, Tiné, Williams, Wolniewicz, Zecho   +24 more
core   +1 more source