Results 31 to 40 of about 9,833 (194)

Hierarchical interactions model for predicting Mild Cognitive Impairment (MCI) to Alzheimer's Disease (AD) conversion.

PLoS ONE, 2014
Identifying patients with Mild Cognitive Impairment (MCI) who are likely to convert to dementia has recently attracted increasing attention in Alzheimer's disease (AD) research.
Han Li, Yashu Liu, Pinghua Gong, Changshui Zhang, Jieping Ye, Alzheimers Disease Neuroimaging Initiative   +5 more
doaj   +1 more source

A Plasma 5-Marker Host Biosignature Identifies Tuberculosis in High and Low Endemic Countries

Frontiers in Immunology, 2021
Background: Several host inflammatory markers have been proposed as biomarkers for diagnosis and treatment response in Tuberculosis (TB), but few studies compare their utility in different demographic, ethnic, and TB endemic settings.Methods: Fifty-four ...
Bih H. Chendi, Bih H. Chendi, Candice I. Snyders, Kristian Tonby, Kristian Tonby, Synne Jenum, Martin Kidd, Gerhard Walzl, Novel N. Chegou, Anne M. Dyrhol-Riise, Anne M. Dyrhol-Riise   +10 more
doaj   +1 more source

Fossil biomass preserved as graphitic carbon in a late paleoproterozoic banded iron formation metamorphosed at more than 550°C [PDF]

, 2019
Metamorphism is thought to destroy microfossils, partly through devolatilization and graphitization of biogenic organic matter. However, the extent to which there is a loss of molecular, elemental and isotope signatures from biomass during high ...
De Gregorio, BT, Drost, M, Kilcoyne, DA, Marbach, H, Nittler, L, Papineau, D, Sagar, J, Thornton, G, Thorogate, R, Wang, J   +9 more
core   +2 more sources

Fingerprinting Non-Terran Biosignatures [PDF]

Astrobiology, 2018
Most strategies for life detection rely upon finding features known to be associated with terran life, such as particular classes of molecules. But life may be vastly different on other planets and moons, particularly as we expand our efforts to explore ocean worlds like Europa and Enceladus.
Johnson, Sarah S., Anslyn, Eric V., Graham, Heather V., Mahaffy, Paul R., Ellington, Andrew D.   +4 more
openaire   +2 more sources

Correlation Network Analysis for Amino Acid Identification in Soil Samples With the ORIGIN Space-Prototype Instrument

Frontiers in Astronomy and Space Sciences, 2022
The detection of biomolecules on Solar System bodies can help us to understand how life emerged on Earth and how life may be distributed in our Solar System.
Loraine Schwander, Niels F.W. Ligterink, Kristina A. Kipfer, Rustam A. Lukmanov, Valentine Grimaudo, Marek Tulej, Coenraad P. de Koning, Peter Keresztes Schmidt, Salome Gruchola, Nikita J. Boeren, Nikita J. Boeren, Pascale Ehrenfreund, Pascale Ehrenfreund, Peter Wurz, Peter Wurz, Andreas Riedo, Andreas Riedo   +16 more
doaj   +1 more source

Early evolution of purple retinal pigments on Earth and implications for exoplanet biosignatures

, 2018
We propose that retinal-based phototrophy arose early in the evolution of life on Earth, profoundly impacting the development of photosynthesis and creating implications for the search for life beyond our planet.
DasSarma, Shiladitya, Schwieterman, Edward W.   +1 more
core   +1 more source

Discriminating between extinct and extant life detection: implications for future Mars missions

Frontiers in Astronomy and Space Sciences
The search for biosignatures on Mars has been a high priority for astrobiology. The approach to detecting putative biosignatures has largely been focused on chemical analyses targeting predominantly extinct life.
Katherine A. Dzurilla, Bronwyn L. Teece
doaj   +1 more source

Detecting industrial pollution in the atmospheres of earth-like exoplanets

, 2014
Detecting biosignatures, such as molecular oxygen in combination with a reducing gas, in the atmospheres of transiting exoplanets has been a major focus in the search for alien life.
Abad, Gonzalo Gonzalez, Lin, Henry W., Loeb, Abraham   +2 more
core   +1 more source

Deciphering Biosignatures in Planetary Contexts [PDF]

Astrobiology, 2019
Microbial life permeates Earth's critical zone and has likely inhabited nearly all our planet's surface and near subsurface since before the beginning of the sedimentary rock record. Given the vast time that Earth has been teeming with life, do astrobiologists truly understand what geological features untouched by biological processes would look like ...
Chan, Marjorie A., Hinman, Nancy W., Potter-McIntyre, Sally L., Schubert, Keith E., Gillams, Richard J., Awramik, Stanley M., Boston, Penelope J., Bower, Dina M., Des Marais, David J., Farmer, Jack D., Jia, Tony Z., King, Penelope L., Hazen, Robert M., Leveille, Richard J., Papineau, Dominic, Rempfert, Kaitlin R., Sanchez-Roman, Monica, Spear, John R., Southam, Gordon, Stern, Jennifer C., Cleaves, Henderson James   +20 more
openaire   +6 more sources

The Cell and the Sum of Its Parts: Patterns of Complexity in Biosignatures as Revealed by Deep UV Raman Spectroscopy

Frontiers in Microbiology, 2019
The next NASA-led Mars mission (Mars 2020) will carry a suite of instrumentation dedicated to investigating Martian history and the in situ detection of potential biosignatures. SHERLOC, a deep UV Raman/Fluorescence spectrometer has the ability to detect
Haley M. Sapers, Haley M. Sapers, Haley M. Sapers, Joseph Razzell Hollis, Rohit Bhartia, Luther W. Beegle, Victoria J. Orphan, Jan P. Amend, Jan P. Amend   +8 more
doaj   +1 more source