Results 71 to 80 of about 198,420 (284)

Two-micron spectrophotometry of the galaxy NGC 253 [PDF]

, 1979
A very strong Brackett-gamma hydrogen emission line, and the 2.3 micron CO stellar absorption feature were measured in NGC 253. The presence and strength of the CO feature indicates that late type giant stars produce most of the 2.2 micron continuum ...
Becklin, E. E., Matthews, K., Neugebauer, G., Wynn-Williams, C. G.   +3 more
core   +1 more source

Strong Variable Ultraviolet Emission from Y Gem: Accretion Activity in an AGB Star with a Binary Companion? [PDF]

, 2011
Binarity is believed to dramatically affect the history and geometry of mass loss in AGB and post-AGB stars, but observational evidence of binarity is sorely lacking.
Alcolea, Bodenheimer, Bond, Calvet, Gullbring, Hrivnak, Jeffries, Jura, Kahane, Karovska, Kastner, Loup, Mastrodemos, Morrissey, Querci, Robinson, Sahai, Sahai, Sahai, Sahai, Schwarz, Soker, Soker, Soker, Van Winckel, Welsh, Wood   +26 more
core   +3 more sources

Identification of serum protein biomarkers for pre‐cancerous lesions associated with pancreatic ductal adenocarcinoma

Molecular Oncology, EarlyView.
This work identified serum proteins associated with pancreatic epithelial neoplasms (PanINs) and early‐stage PDAC. Proteomics screens assessed genetically engineered mice with abundant PanINs, KPC mice (Lox‐STOP‐Lox‐KrasG12D/+ Lox‐STOP‐Lox‐Trp53R172H/+ Pdx1‐Cre) before PDAC development and also early‐stage PDAC patients (n = 31), compared to benign ...
Hannah Mearns, Jaclyn S. Long, Sergio Lilla, Kelly Hodge, Marcus J. G. W. Ladds, Colin Nixon, Paula Fernández‐Palanca, Sara Zanivan, Pilar Acedo, Stephen P. Pereira, Kevin M. Ryan   +10 more
wiley   +1 more source

Dynamical Masses and Radiative Transfer Modeling of HD 698: A Be Binary in Evolutionary Transition

The Astrophysical Journal
We present a detailed analysis of the early post-mass-transfer binary system HD 698 (V742 Cas), combining high-resolution optical spectroscopy, long-baseline interferometry, and radiative transfer modeling.
Ilfa A. Gabitova, Alex C. Carciofi, Tajan H. de Amorim, Mark Suffak, Anatoly S. Miroshnichenko, Sergey V. Zharikov, Amanda C. Rubio, Steve Danford, Alicia N. Aarnio, Peter Prendergast, Richard J. Rudy, Richard C. Puetter, R. Brad Perry, Aldiyar T. Agishev, Nadezhda L. Vaidman, Serik A. Khokhlov   +15 more
doaj   +1 more source

Emission-Line Variability in Quiescent Flare Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1974
Spectroscopic monitoring of five flare stars (UV Ceti, YZ CMi, BY Dra, YY Gem, and BD + 48 deg 1958A) reveals that the stars exhibit marked decreases in the Balmer and Ca II emission line strengths over intervals of one day or less. The variations can be explained by a nonuniform, patchy distribution of emitting regions on a rotating star.
openaire   +1 more source

IMPDH inhibition enhances cytarabine efficacy in SAMHD1‐expressing leukaemia cells via guanine nucleotide depletion

Molecular Oncology, EarlyView.
Cytarabine is a key therapy for acute myeloid leukaemia (AML), but its efficacy is limited by the dNTPase SAMHD1, which hydrolyses its active metabolite. Screening nucleotide biosynthesis inhibitors revealed that IMPDH inhibitors selectively sensitise SAMHD1‐proficient AML cells to cytarabine.
Miriam Yagüe‐Capilla, Christopher Dirks, Caroline Eiden, Sonja K. Fesenmayer, Femke M. Hormann, Yolande Klootsema, Ingrid Lilienthal, Si Min Zhang, Nikolas Herold, Sean G. Rudd   +9 more
wiley   +1 more source

Raman‐based label‐free microscopic analysis of the pancreas in living zebrafish larvae

FEBS Open Bio, EarlyView.
Forward stimulated Raman scattering (F‐SRS) and epi coherent anti‐Stokes Raman scattering (E‐CARS) allow label‐free discrimination of distinct subcellular structures in the pancreas of living zebrafish larvae. Given the straightforward applicability, we anticipate broad implementation of Raman microscopy in other organs and across various biomedical ...
Noura Faraj, Eline M. F. de Lange, Klaas A. Sjollema, Ben N. G. Giepmans   +3 more
wiley   +1 more source

First Detection of Shock Waves in RRc Stars

The Astrophysical Journal
Although shock waves have been well documented in fundamental-mode RRab stars, their existence in first-overtone pulsator stars, RRc stars, has remained uncertain. Building upon the spectroscopic frameworks established by M. Chadid et al., we present the
Junzhang Li, Merieme Chadid
doaj   +1 more source

Mira Variable Stars From LAMOST DR4 Data: Emission Features, Temperature Types, and Candidate Selection

, 2017
Based on an extensive spectral study of a photometrically confirmed sample of Mira variables, we find a relationship between relative Balmer emission-line strength and spectral temperature of O-rich Mira stars.
de Grijs, Richard, Deng, Licai, Liu, Chao, Matsunaga, Noriyuki, Yao, Yuhan   +4 more
core   +1 more source

Properties of galactic B[e] supergiants. IV. Hen3-298 and Hen3-303 [PDF]

, 2005
We present the results of optical and near-IR spectroscopic and near-IR photometric observations of the emission-line stars Hen3-298 and Hen3-303. Strong emission in the H-alpha line is found in both objects.
A. S. Miroshnichenko, Allen, Carter, Dong, Dubath, F. Marang, Gehrz, H. Levato, Henize, Herbig, Hinkle, K. Hinkle, K. S. Bjorkman, Kraus, Lamers, M. Grosso, Machado, Miroshnichenko, Miroshnichenko, Miroshnichenko, Miroshnichenko, Miroshnichenko, Monet, Morrison, Neckel, Palla, Savage, Smith, Thé, Wackerling, Wolf, Zickgraf   +31 more
core   +2 more sources