Results 81 to 90 of about 863,347 (299)

Gaseous Material Orbiting the Polluted, Dusty White Dwarf HE1349-2305 [PDF]

, 2012
We present new spectroscopic observations of the polluted, dusty, helium-dominated atmosphere white dwarf star HE1349-2305. Optical spectroscopy reveals weak CaII infrared triplet emission indicating that metallic gas debris orbits and is accreted by the
Bessel, Brinkworth, Brinkworth, Debes, Dufour, Dufour, Dufour, Dufour, Epchtein, Farihi, Farihi, Farihi, Girven, Gänsicke, Gänsicke, Jura, Jura, Jura, Klein, Klein, Martin, Melis, Melis, Morrissey, Skrutskie, Zuckerman, Zuckerman   +26 more
core   +2 more sources

Optical wavelength-modulation spectroscopy [PDF]

Surface Science, 1973
Abstract Wavelength-modulation spectroscopy of solids is reviewed. The construction of a wavelength-modulation spectrometer is described and several examples on its applications to solids are given. It is shown that the results of Pseudopotential calculations agree well with the experimental observations.
openaire   +2 more sources

Sudden anaerobization in Amphibacillus xylanus increases intracellular labile ferrous iron and inhibits cell growth

FEBS Open Bio, EarlyView.
Abruptly changing from aerobic to anaerobic conditions (sudden anaerobization) induced growth inhibition and a significant increase in intracellular labile ferrous iron in the aerotolerant anaerobe Amphibacillus xylanus. We found that free flavins mediate efficient electron transfer from NADH to ferric iron under anaerobic conditions, suggesting that ...
Shinya Kimata, Yoichi Sakai, Keisuke Tanaka, Etsuro Yoshimura, Ken Kitano, Morio Ishikawa, Tadahiro Nakamoto, Tsutomu Takayama, Hirofumi Inoue, Kaho Nomura, Tomonori Suzuki, Masataka Uchino, Akira Abe, Youichi Niimura   +13 more
wiley   +1 more source

Terahertz and Photoelectron Emission from Nanoporous Gold Films on Semiconductors

Nanomaterials, 2019
Efficient terahertz and photoelectron emission were observed from nano-porous gold (NPG) films deposited on an intrinsic gallium arsenide (GaAs) semiconductor substrate stimulated by femtosecond laser with pulse width of 60 fs.
Junyi Nan, Min Li, Ling Zhang, Shuai Yuan, Boqu He, Heping Zeng   +5 more
doaj   +1 more source

Thermal accommodation in nanoporous silica for vacuum insulation panels

International Journal of Thermofluids, 2020
The thermal accommodation coefficient is a measure for the quality of thermal energy exchange between gas molecules and a solid surface. It is an important parameter to describe heat flow in rarefied gases, for example, in aerospace or vacuum technology.
S. Sonnick, M. Meier, G. Ünsal-Peter, L. Erlbeck, H. Nirschl, M. Rädle   +5 more
doaj   +1 more source

The Effect of Condensates on the Characterization of Transiting Planet Atmospheres with Transmission Spectroscopy

, 2005
Through a simple physical argument we show that the slant optical depth through the atmosphere of a "hot Jupiter" planet is 35-90 times greater than the normal optical depth.
Ackerman, Allard, Atreya, Barman, Barman, Brooke, Brown, Carlson, Chamberlain, Charbonneau, Charbonneau, Cho, Cooper, Cooper, Deming, Fegley, Flasar, Fortney, Fortney, Harrington, Haywood, Henry, Hubbard, Iro, Jonathan J. Fortney, Liang, Lodders, Lodders, Marley, Marley, Marley, Moses, Narita, Rages, Seager, Showman, Sudarsky, Tomasko, Vidal-Madjar, Vidal-Madjar, West   +40 more
core   +3 more sources

Development of a Prediction Model for Progression Risk in High‐Grade Gliomas Based on Habitat Radiomics and Pathomics

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To investigate the value of constructing models based on habitat radiomics and pathomics for predicting the risk of progression in high‐grade gliomas. Methods This study conducted a retrospective analysis of preoperative magnetic resonance (MR) images and pathological sections from 72 patients diagnosed with high‐grade gliomas (52 ...
Yuchen Zhu, Yuxi Gong, Weilin Xu, Xingjian Sun, Gefei Jiang, Lei Qiu, Kexin Shi, Mengxing Wu, Yinjiao Fei, Jinling Yuan, Jinyan Luo, Yurong Li, Yuandong Cao, Minhong Pan, Shu Zhou   +14 more
wiley   +1 more source

Exploring the Aβ Plaque Microenvironment in Alzheimer’s Disease Model Mice by Multimodal Lipid-Protein-Histology Imaging on a Benchtop Mass Spectrometer

Pharmaceuticals
Amyloid-β (Aβ) plaque deposits in the brain are a hallmark of Alzheimer’s disease (AD) neuropathology. Plaques consist of complex mixtures of peptides like Aβ1–42 and characteristic lipids such as gangliosides, and they are targeted by reactive microglia
Elisabeth Müller, Thomas Enzlein, Dagmar Niemeyer, Livia von Ammon, Katherine Stumpo, Knut Biber, Corinna Klein, Carsten Hopf   +7 more
doaj   +1 more source

Sorting and transmission electron microscopy analysis of single or double wall carbon nanotubes [PDF]

, 2009
On the basis of the recent progress on the sorting of carbon nanotubes’ structure with respect to their diameter or number of walls, we investigate by transmission electron microscopy the sorting efficiency, with a comparison with optical absorption ...
Arnold, Avouris, Bachilo, Flahaut, Fleurier, Green, Hertel, Jiang, Kim, Lambin, Lauret, Lauret, O'Connell, Rao, Sato   +14 more
core   +2 more sources

Optical Spectroscopy

Reviews in Mineralogy and Geochemistry, 2014
Optical spectroscopy is concerned with the measurement of the absorption, reflection and emission of light in the near-ultraviolet (~250 nm) through the mid-infrared (~3000 nm) portions of the spectrum. The human interface to the geological and mineralogical world is primarily visual. Optical spectroscopy is, in particular, well suited to investigating
openaire   +4 more sources