Results 91 to 100 of about 7,914 (245)

Out There No One Has a Right to Die

Bioethics, Volume 40, Issue 6, Page 565-572, July 2026.
ABSTRACT The eventual goal of space exploration is to colonize exoplanets and their moons outside our solar system. This is a dangerous and immoral endeavour. The extraterrestrial life forms encountered would be hostile, vulnerable or both, and the descendants of the original pioneers would be involuntarily exposed to hazardous conditions and ...
Matti Häyry
wiley   +1 more source

Chemical Abundances of New Member Stars in the Tucana II Dwarf Galaxy

, 2018
We present chemical abundance measurements for seven stars with metallicities ranging from Fe/H] =-3.3 to [Fe/H] =-2.4 in the Tucana II ultra-faint dwarf galaxy (UFD), based on high-resolution spectra obtained with the MIKE spectrograph on the 6.5 m ...
Alexander P. Ji, Dongwon Kim, Chiti, Anirudh, Frebel, Anna L., Anirudh Chiti, Ji, Alexander P., Kim, Dongwon, John E. Norris, Anna Frebel, Jerjen, Helmut, Helmut Jerjen, Norris, John E.   +11 more
core   +1 more source

A Constellation of Fluorescent Biosensors to Illuminate the Galaxy of Protein Kinases

ChemBioChem, Volume 27, Issue 11, 15 June 2026.
Protein kinases (PKs) are enzymes that catalyze phosphorylation of protein substrates involved in a wide variety of biological signalling pathways. This review describes the different families and mechanisms of action and regulation of protein kinases, together with the different classes of fluorescent biosensors that have been engineered and ...
Timothe Abbura, May C. Morris
wiley   +1 more source

The Impact of Initial Composition on Massive Star Evolution and Nucleosynthesis

The Astrophysical Journal
We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the initial composition. We use the solar abundances from Lodders, and compute two different sets of initial stellar compositions ...
Christopher West, Alexander Heger, Benoit Côté, Lev Serxner, Haoxuan Sun   +4 more
doaj   +1 more source

Subterranean environments contribute to three‐quarters of classified ecosystem services

Biological Reviews, Volume 101, Issue 3, Page 1582-1605, June 2026.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola, David Brankovits, Tiziana Di Lorenzo, Isabel R. Amorim, Raluca Ioana Bancila, Adrià Bellvert, Enrico Bernard, Anna Blomberg, Paulo A.V. Borges, Martina Cappelletti, Rodrigo Lopes Ferreira, Rosalina Gabriel, Diana M. P. Galassi, Laura Garzoli, Vasilis Gerovasileiou, Grant C. Hose, Kathryn L. Korbel, Simone Martino, Ana Z Miller, Nataša Mori, Veronica Nanni, Giuseppe Nicolosi, Mattia Saccò, Troy S. Sakihara, Marconi Souza Silva, Anne E. Tamalavage, Maja Zagmajster, Efraín Chávez, Christian Griebler, Pedro Cardoso, Alejandro Martínez   +30 more
wiley   +1 more source

Chemical abundances and radial velocities in the extremely metal-poor galaxy DDO 68 [PDF]

, 2019
We present chemical abundances and radial velocities of six H II regions in the extremely metal-poor star-forming dwarf galaxy DDO 68. They are derived from deep spectra in the wavelength range 3500-10 000 Å, acquired with the Multi-Object Double ...
Annibali, F, TOSI, Monica, CUSANO, FELICE, ROMANO, Donatella, Romano, D, MIGNOLI, Marco, Sacchi, E., Bellazzini, M, Ciotti, L, Sacchi, E, Mignoli, M, Nipoti, C, ANNIBALI, FRANCESCA, Marchetti, A, Tosi, M, Aloisi, A., La Torre, V, Aloisi, A, Cusano, F, La Torre, V., BELLAZZINI, Michele, Nipoti, C., Ciotti, L., MARCHETTI, Alida   +23 more
core   +1 more source

MiR‐21‐5p Protects Embryonic Growth and Heart Function During Developmental Hypoxia by Dampening HIF Responses and Altering Gene Expression

Comprehensive Physiology, Volume 16, Issue 3, June 2026.
miR‐21‐5p protects embryonic growth and heart function during developmental hypoxia by dampening HIF responses and shifting gene networks toward improved cardiomyocyte survival and calcium handling. This work identifies miR‐21‐5p as a promising therapeutic target for preventing fetal growth restriction and cardiovascular impairment in high‐risk ...
Bernardo J. Krause, Ximena Calle, Ranya V. Kumar, Youguo Niu, Oriana Ramirez‐Herrera, Damariz Gonzalez, Barbara Bernal, Sage G. Ford, Rachael C. Crew, Anna L. K. Cochrane, German A. Arenas, Alex Di Genova, Dino A. Giussani   +12 more
wiley   +1 more source

QCD equation of state and dark matter

, 2012
The QCD equation of state is not often discussed in cosmology. However, the relic density of weakly interacting massive particles (WIMPs) depends on the entropy and the expansion rate of the Universe when they freeze out, at a temperature in the range ...
Philipsen, Owe, Hindmarsh, Mark, MARK HINDMARSH, OWE PHILIPSEN   +3 more
core   +1 more source

The Heavy Metal Survey: The Evolution of Stellar Metallicities, Abundance Ratios, and Ages of Massive Quiescent Galaxies since z ∼ 2

The Astrophysical Journal
We present the elemental abundances and ages of 19 massive quiescent galaxies at z ∼ 1.4 and z ∼ 2.1 from the Keck Heavy Metal Survey. The ultradeep LRIS and MOSFIRE spectra were modeled using a full-spectrum stellar population fitting code with variable
Aliza G. Beverage, Mariska Kriek, Katherine A. Suess, Charlie Conroy, Sedona H. Price, Guillermo Barro, Rachel Bezanson, Marijn Franx, Brian Lorenz, Yilun Ma, Lamiya A. Mowla, Imad Pasha, Pieter van Dokkum, Daniel R. Weisz   +13 more
doaj   +1 more source

Mitochondrial Genome of the Indo‐Pacific Mesophotic Coral Leptoseris columna (Scleractinia: Agariciidae) Assembled Using PacBio Long‐Read Sequencing

Ecology and Evolution, Volume 16, Issue 6, June 2026.
The complete mitochondrial genome of Leptoseris columna was assembled using PacBio long read sequencing. ABSTRACT Leptoseris columna, a mesophotic coral species belonging to the family Agariciidae, is distributed throughout the Indo‐Pacific region.
Nomita Rani Adhikary, Daniel J. Barshis, J. Antonio Baeza   +2 more
wiley   +1 more source