Results 51 to 60 of about 260,252 (303)

Infrared spectroscopy of HCOOH in interstellar ice analogues

, 2007
Context: HCOOH is one of the more common species in interstellar ices with abundances of 1-5% with respect to solid H2O. Aims: This study aims at characterizing the HCOOH spectral features in astrophysically relevant ice mixtures in order to interpret ...
A. C. A. Boogert, Andersson, Bahr, Bisschop, Boogert, Borodin, Bottinelli, Cyriac, Dartois, E. F. van Dishoeck, Ehrenfreund, Ehrenfreund, G. W. Fuchs, Garrod, Gerakines, Gerakines, Gibb, Gibb, H. Linnartz, Hollis, Hudson, Ikeda, Knez, Liu, Marechal, Millikan, Park, Park, Pontoppidan, Remijan, Requena-Torres, S. E. Bisschop, Schutte, Schutte, Souda, Tielens, Tielens, van Dishoeck, Watanabe, Watanabe, Yokoyama, Öberg   +41 more
core   +1 more source

Theoretical Spectra of Terrestrial Exoplanet Surfaces [PDF]

, 2012
We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in ...
Batalha, Best, Bethany L. Ehlmann, Borucki, Borucki, Cheek, Clark, Clark, Cochran, Cowan, de Pater, Drilling, Farmer, Gautier, Koch, Miller-Ricci, Muirhead, Pieters, Pieters, RELAB Spectral Database, Renyu Hu, Rogers, Salisbury, Sara Seager, Seager, Seager, Sobolev, Sprague, Winn   +28 more
core   +2 more sources

Cell surface interactome analysis identifies TSPAN4 as a negative regulator of PD‐L1 in melanoma

Molecular Oncology, EarlyView.
Using cell surface proximity biotinylation, we identified tetraspanin TSPAN4 within the PD‐L1 interactome of melanoma cells. TSPAN4 negatively regulates PD‐L1 expression and lateral mobility by limiting its interaction with CMTM6 and promoting PD‐L1 degradation.
Guus A. Franken, Andrea Abel Gutierrez, Imke van Rossum, Cornelia G. Spruijt, Michiel Vermeulen, Guido van Mierlo, Blanca Scheijen, Annemiek B. van Spriel   +7 more
wiley   +1 more source

Infrared Band Strengths of Dangling OH Features in Amorphous Water at 20 K

The Astrophysical Journal
Infrared (IR) spectra of vapor-deposited amorphous water at low temperatures show two weak peaks at around 3720 and 3696 cm ^−1 assigned to free-OH stretching modes of two- and three-coordinated water molecules (so-called “dangling” OH bonds ...
Takeshi Hasegawa, Hiroto Yanagisawa, Takumi Nagasawa, Reo Sato, Naoki Numadate, Tetsuya Hama   +5 more
doaj   +1 more source

Plecstatin inhibits hepatocellular carcinoma tumorigenesis and invasion through cytolinker plectin

Molecular Oncology, EarlyView.
The ruthenium‐based metallodrug plecstatin exerts its anticancer effect in hepatocellular carcinoma (HCC) primarily through selective targeting of plectin. By disrupting plectin‐mediated cytoskeletal organization, plecstatin inhibits anchorage‐dependent growth, cell polarization, and tumor cell dissemination.
Zuzana Outla, Jan Kosla, Magdalena Prechova, Lukas Frick, Patricia Bortel, Yasmin Borutzki, Andrea Bileck, Christopher Gerner, Samuel M. Meier‐Menches, Selma Osmanagic‐Myers, Martin Gregor   +10 more
wiley   +1 more source

The Fate of Frozen Carbonated Water at Europa-like Conditions

The Planetary Science Journal
We present the results of experiments probing the retention of CO _2 in crystalline water ice, frozen sodium chloride (NaCl) brines, and flash-frozen carbonated water using diffuse reflectance infrared spectroscopy. Characteristic absorptions alluding to
Swaroop Chandra, William T. P. Denman, Michael E. Brown   +2 more
doaj   +1 more source

The State of CO and CO2 Ices in the Kuiper Belt as Seen by JWST

The Planetary Science Journal, 2023
JWST has shown that CO _2 and CO are common on the surfaces of objects in the Kuiper Belt and have apparent surface coverages even higher than that of water ice, though water ice is expected to be significantly more abundant in the bulk composition ...
Michael E. Brown, Wesley C. Fraser
doaj   +1 more source

Multiproxy investigation of the last 2,000 years BP marine paleoenvironmental record along the western Spitsbergen margin

Arctic, Antarctic, and Alpine Research, 2022
A reconstruction of the last 2,000 years BP of environmental and oceanographic changes on the western margin of Spitsbergen was performed using a multidisciplinary approach including the fossil assemblages of diatoms, planktic and benthic foraminifera ...
Fiorenza Torricella, Viviana Maria Gamboa Sojo, Karen Gariboldi, Nessim Douss, Maria Elena Musco, Chiara Caricchi, Renata Giulia Lucchi, Katia Carbonara, Caterina Morigi   +8 more
doaj   +1 more source

Quantification of segregation dynamics in ice mixtures

, 2009
(Abridged) The observed presence of pure CO2 ice in protostellar envelopes is attributed to thermally induced ice segregation, but a lack of quantitative experimental data has prevented its use as a temperature probe. Quantitative segregation studies are
Bergin, Bergin, Bernstein, Bouwman, Chiar, Collings, Collings, Cuppen, Dartois, E. C. Fayolle, E. F. van Dishoeck, Ehrenfreund, Ehrenfreund, Fuchs, Garrod, Gerakines, Gerakines, Gerakines, H. Linnartz, H. M. Cuppen, Hodyss, Ioppolo, Jenniskens, K. I. Öberg, Knez, Loeffler, Los, Los, Merrill, Nummelin, Palumbo, Pontoppidan, Pontoppidan, Sandford, Sonnentrucker, Teolis, Tielens, van Broekhuizen, Visser, Watanabe, Watanabe, Zasowski, Öberg, Öberg   +43 more
core   +1 more source

CO2 Ice toward Low-luminosity, Embedded Protostars: Evidence for Episodic Mass Accretion via Chemical History [PDF]

, 2012
We present Spitzer IRS spectroscopy of CO2 ice bending mode spectra at 15.2 micrometer toward 19 young stellar objects with luminosity lower than 1 Lsun (3 with luminosity lower than 0.1 Lsun). Ice on dust grain surfaces can encode the history of heating
André, Bergin, Chen, Chen, Chiar, Cook, D'Hendecourt, di Francesco, Doty, Dunham, Dunham, Dunham, Dunham, Dunham, Ehrenfreund, Enoch, Enoch, Evans, Furuya, Garrod, Gerakines, Hagen, Hansen, Houck, Hyo Jeong Kim, Ivezic, Jeong-Eun Lee, Kim, Klaus M. Pontoppidan, Knez, Larson, Lee, Lee, Masunaga, Michael M. Dunham, Neal J. Evans, Oba, Offner, Pontoppidan, Pontoppidan, Roser, Visser, Vorobyov, Vorobyov, Whittet, Young, Young, Young, Öberg   +48 more
core   +2 more sources