Results 91 to 100 of about 4,473,250 (366)

Hematopoietic (stem) cells—The elixir of life?

FEBS Letters, EarlyView.
The aging of HSCs (hematopoietic stem cells) and the blood system leads to the decline of other organs. Rejuvenating aged HSCs improves the function of the blood system, slowing the aging of the heart, kidney, brain, and liver, and the occurrence of age‐related diseases.
Emilie L. Cerezo, Jonah Anderson, Emilie Dinh Vedrenne, Noël Yeh Martín, Jette Lengefeld   +4 more
wiley   +1 more source

The Missing Link of Sulfur Chemistry in TMC-1: The Detection of c-C3H2S from the GOTHAM Survey

The Astrophysical Journal
We present the spectroscopic characterization of cyclopropenethione in the laboratory and detect it in space using the Green Bank Telescope Observations of TMC-1: Hunting Aromatic Molecules survey.
Anthony J. Remijan, P. Bryan Changala, Ci Xue, Elsa Q. H. Yuan, Miya Duffy, Haley N. Scolati, Christopher N. Shingledecker, Thomas H. Speak, Ilsa R. Cooke, Ryan Loomis, Andrew M. Burkhardt, Zachary T. P. Fried, Gabi Wenzel, Andrew Lipnicky, Michael C. McCarthy, Brett A. McGuire   +15 more
doaj   +1 more source

The RAVE-on Catalog of Stellar Atmospheric Parameters and Chemical Abundances for Chemo-dynamic Studies in the Gaia Era [PDF]

, 2016
The orbits, atmospheric parameters, chemical abundances, and ages of individual stars in the Milky Way provide the most comprehensive illustration of galaxy formation available.
A. Casey, K. Hawkins, D. Hogg, M. Ness, Hans Walter-Rix, G. Kordopatis, A. Kunder, M. Steinmetz, Sergey E. Koposov, H. Enke, J. Sanders, G. Gilmore, T. Zwitter, K. Freeman, L. Casagrande, G. Matijevivc, G. Seabroke, O. Bienaym'e, J. Bland-Hawthorn, B. Gibson, E. Grebel, A. Helmi, U. Munari, J. Navarro, W. Reid, A. Siebert, R. Wyse   +26 more
semanticscholar   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Chemical abundances in Galactic planetary nebulae with Spitzer spectra [PDF]

, 2014
We present new low-resolution (R~800) optical spectra of 22 Galactic PNe with Spitzer spectra. These data are combined with recent optical spectroscopic data available in the literature to construct representative samples of compact (and presumably young)
Garcia-Hernandez, D. A., Gorny, S. K.
core   +2 more sources

APOGEE chemical abundances of globular cluster giants in the inner Galaxy [PDF]

, 2016
We report chemical abundances obtained by Sloan Digital Sky Survey (SDSS)-III/Apache Point Observatory Galactic Evolution Experiment for giant stars in five globular clusters located within 2.2 kpc of the Galactic Centre.
R. Schiavon, Jennifer A. Johnson, P. Frinchaboy, G. Zasowski, S. Mészáros, D. A. García-Hernández, R. Cohen, B. Tang, S. Villanova, D. Geisler, T. Beers, J. Fernández-Trincado, A. G. Pérez, S. Lucatello, S. Majewski, S. Martell, R. O’Connell, C. Prieto, D. Bizyaev, R. Carrera, R. Lane, E. Malanushenko, V. Malanushenko, R. Muñoz, C. Nitschelm, D. Oravetz, K. Pan, A. Roman-Lopes, M. Schultheis, A. Simmons   +29 more
semanticscholar   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source

Chemical Cartography with APOGEE: Two-process Parameters and Residual Abundances for 288,789 Stars from Data Release 17

The Astrophysical Journal
Stellar abundance measurements are subject to systematic errors that induce extra scatter and artificial correlations in elemental abundance patterns. We derive empirical calibration offsets to remove systematic trends with surface gravity $\mathrm{log ...
Tawny Sit, David H. Weinberg, Adam Wheeler, Christian R. Hayes, Sten Hasselquist, Thomas Masseron, Jennifer Sobeck   +6 more
doaj   +1 more source

Chemical Abundances of M-Dwarfs from the Apogee Survey. I. The Exoplanet Hosting Stars Kepler-138 and Kepler-186 [PDF]

, 2016
We report the first detailed chemical abundance analysis of the exoplanet-hosting M-dwarf stars Kepler-138 and Kepler-186 from the analysis of high-resolution (R ∼ 22,500) H-band spectra from the SDSS-IV–APOGEE survey.
D. Souto, Katia Cunha, D. A. García-Hernández, O. Zamora, C. Prieto, V. Smith, S. Mahadevan, Cullen H. Blake, J. Johnson, H. Jőnsson, M. Pinsonneault, Jon A. Holtzman, S. Majewski, M. Shetrone, J. Teske, D. Nidever, R. Schiavon, J. Sobeck, A. Pérez, Y. G. M. Chew, K. Stassun   +20 more
semanticscholar   +1 more source

The role and implications of mammalian cellular circadian entrainment

FEBS Letters, EarlyView.
At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley   +1 more source