Results 71 to 80 of about 4,760 (150)

Evaluation of the Expression and Prognosis of Neural‐Related Products Expressed by Cancer‐Derived Mesenchymal Stem Cells With the Characteristics of Neural Stem Cells

Cancer Medicine, Volume 15, Issue 9, September 2026.
ABSTRACT Studies have demonstrated that the nervous system plays an important role in cancer progression. Nevertheless, the effect of mesenchymal stem cells (MSCs) on cancer has yielded conflicting results. In this study, we discovered that cancer‐derived MSCs (CA‐MSCs) not only exhibit the properties of neural stem cells (NSCs) but also express a ...
Liu Yongjun, Pan Zhiwen, Fu Shangui, Zhai Jinjie, Ying Rongbiao, Chen Zhongjian, Chen Wanyuan, Ju Haixing, Ma Dening, Long Dan, Luo Cong, Fu Zhixuan   +11 more
wiley   +1 more source

The HOMO-LUMO Gap as Discriminator of Biotic from Abiotic Chemistries

Life
Low-molecular-mass organic chemicals are widely discussed as potential indicators of life in extraterrestrial habitats. However, demarcation lines between biotic chemicals and abiotic chemicals have been difficult to define.
Roman Abrosimov, Bernd Moosmann
doaj   +1 more source

Evaluating the biosignature potential of ammonium in Proterozoic red beds and implications for the search for life on Mars

Earth and Planetary Physics
Over the past two decades, it has become increasingly apparent that early Mars may once have been warmer, wetter and more habitable for microbial life than it is today, which has spurred discussions about potential biosignatures that may be preserved in ...
Eva E. Stüeken, Philip Fralick, Stephen Hillier, Anthony R. Prave   +3 more
doaj   +1 more source

Methanol—A Poor Biosignature Gas in Exoplanet Atmospheres

, 2022
Biosignature gas research has been growing in recent years thanks to next-generation space- and ground-based telescopes. Methanol (CH3OH) has many advantages as a biosignature gas candidate.
Huang, Jingcheng, Ranjan, Sukrit, Seager, Sara, Petkowski, Janusz J, Zhan, Zhuchang, Jingcheng Huang, Sara Seager, Janusz J. Petkowski, Zhuchang Zhan, Sukrit Ranjan   +9 more
core   +1 more source

Membrane-Spanning Molecular Lengths as an Agnostic Biosignature

We explore a hypothesis in which the detection of classes of lipid-like molecules with similar abundance-averaged lengths would constitute a biosignature for other worlds. This is based on the functional requirements of membrane molecules: they must have
Malaska, Michael J.;Sandström, Hilda;Hofmann, Amy E.;Hodyss, Robert;Rensmo, Linnea;van der Meulen, Mark;Rahm, Martin;Cable, Morgan L.;Lunine, Jonathan I.
core   +1 more source

Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group [PDF]

, 2010
The Mars Science Laboratory (MSL) has an instrument package capable of making measurements of past and present environmental conditions. The data generated may tell us if Mars is, or ever was, able to support life.
Dromart, Gilles, Bish, David, Roger Buick, Eigenbrode, Jennifer L., Sumner, Dwan Y., Dawn Y. Sumner, Buick, Roger, Knoll, Andrew, Jennifer L. Eigenbrode, Des Marais, David J., Summons, Roger E., Knoll, Andrew H., Roger E. Summons, Amend, Jan P., Andrew H. Knoll, Jan P. Amend, Gilles Dromart, Des Marais, David, David J. Des Marais, Bish, David L., Cody, George D., Summons, Roger E, David Bish, George D. Cody, Sumner, Dawn Y., Des Marias, David J.   +25 more
core   +1 more source

Detectability of biosignature gases in the atmospheres of terrestrial exoplanets [PDF]

, 2013
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2013.This electronic version was submitted by the student author.
Messenger, Stephen Joseph
core  

Microbial Autotrophy Recorded by Carbonate Dual Clumped Isotope Disequilibrium

Geochemistry, Geophysics, Geosystems
The proliferation of microbial carbon fixation is a key control on the evolution of the biosphere and global carbon cycle. Most records of these metabolisms in ancient rocks come from organic matter or fossils, which are not always preserved.
Miquela Ingalls, Hanna C. Leapaldt, Max K. Lloyd   +2 more
doaj   +1 more source

East Meridiani Planum’s karst geomorphology and biosignature preservation potential: a multi-criteria landing site analysis

Frontiers in Astronomy and Space Sciences
IntroductionFuture Mars astrobiology missions require landing sites that balance scientific potential for biosignature detection with engineering safety.
Shaoqiu Wang
doaj   +1 more source

The First Remotely Detected Biosignature May Not Be the Most Common: Implications for JWST and HWO

The Astrophysical Journal Letters
The first detected member of a new astronomical class is often not representative of the underlying population, but instead reflects the selection effects of the observing technique that found it.
Ravi Kopparapu
doaj   +1 more source