Results 41 to 50 of about 4,760 (150)

Life in The Context of Order and Complexity

Life, 2020
It is generally accepted that life requires structural complexity. However, a chaotic mixture of organic compounds like the one formed by extensive reaction sequences over time may be extremely complex, but could just represent a static asphalt-like dead
Christian Mayer
doaj   +1 more source

Biological and geological characterization of modern biofilms and microbial mats and comparison with similar lithified structures in Colombian Cretaceous formations

Earth Sciences Research Journal, 2018
Microorganisms may play an important role in the aggregation of sediments and the formation of sedimentary structures. Biofilms are microbial aggregates that, in a mature stage, can develop into microbial mats, fibrillar networks that irreversibly bind ...
Daniela Osorio-Rodriguez, Carlos Alberto Sanchez-Quiñónez   +1 more
doaj   +1 more source

Time‐Efficient Interleaved Spin Density‐Weighted and Inversion Recovery 23Na MRI of the Human Calf Muscle at 7 T

Magnetic Resonance in Medicine, Volume 96, Issue 6, Page 2675-2684, December 2026.
ABSTRACT Purpose Spin density‐weighted (SDW) and inversion recovery (IR) 23Na MRI provide different sodium contrasts with complementary information. Therefore, the aim was to develop a time‐efficient sequence scheme capable of providing both contrasts by acquiring SDW and IR 23Na MRI data within a single sequence without additional measurement time ...
Tobias Wilferth, Fiona Meyer, Jordan M. Höhn, Michael Uder, Armin M. Nagel   +4 more
wiley   +1 more source

Screening and identification of a six-cytokine biosignature for detecting TB infection and discriminating active from latent TB

Journal of Translational Medicine, 2018
Background The early and accurate diagnosis of tuberculosis (TB) is critical for controlling the global TB epidemic. Although early studies have supported the potential role of cytokine biomarkers in blood for the diagnosis of TB, this method requires ...
Sen Wang, Yang Li, Yaojie Shen, Jing Wu, Yan Gao, Shu Zhang, Lingyun Shao, Jialin Jin, Ying Zhang, Wenhong Zhang   +9 more
doaj   +1 more source

A Deep Nonlinear Subspace Modeling and Reconstruction for Diffusion‐Weighted Imaging Using Denoising Auto‐Encoder

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2359-2369, November 2026.
ABSTRACT Purpose To present a novel, nonlinear subspace modeling and joint k–q‐space reconstruction technique for high‐resolution, multi‐band, multi‐shell diffusion‐weighted imaging (DWI). Methods High b‐value (> 1000 s/mm2), high resolution DWI has the drawback of generally low signal‐to‐noise ratios (SNRs).
Julius Glaser, Zhengguo Tan, Annika Hofmann, Frederik Bernd Laun, Florian Knoll   +4 more
wiley   +1 more source

Impact Crater Hydrothermal Systems Support Rapid Microbial Enrichment and Diverse Metabolic Potential

Geobiology, Volume 24, Issue 6, November/December 2026.
ABSTRACT Impact crater hydrothermal systems, formed after asteroid and comet impacts, have been proposed as promising habitats for life on early Earth and as key targets in the search for life on planetary bodies such as Mars, since they provide liquid water and active geochemical turnover.
Sabrina M. C. Hardy, Emily J. Aguilar‐Pine, Sean Gulick, Alaa Ahmad, Brett J. Baker, Nathalie Scott, Georgina Aitolo, Naomi Felton, Charles S. Cockell   +8 more
wiley   +1 more source

Reprogramming of Small Noncoding RNA Populations in Peripheral Blood Reveals Host Biomarkers for Latent and Active Mycobacterium tuberculosis Infection

mBio, 2019
In tuberculosis (TB), as in other infectious diseases, studies of small noncoding RNAs (sncRNA) in peripheral blood have focused on microRNAs (miRNAs) but have neglected the other major sncRNA classes in spite of their potential functions in host gene ...
Leonardo Silva de Araujo, Marcelo Ribeiro-Alves, Thyago Leal-Calvo, Janaína Leung, Verónica Durán, Mohamed Samir, Steven Talbot, Aravind Tallam, Fernanda Carvalho de Queiroz Mello, Robert Geffers, Maria Helena Féres Saad, Frank Pessler   +11 more
doaj   +1 more source

Predictive biosignature of major depressive disorder derived from physiological measurements of outpatients using machine learning

Scientific Reports, 2023
Major Depressive Disorder (MDD) has heterogeneous manifestations, leading to difficulties in predicting the evolution of the disease and in patient's follow-up.
Nicolas Ricka, Gauthier Pellegrin, Denis A. Fompeyrine, Bertrand Lahutte, Pierre A. Geoffroy   +4 more
doaj   +1 more source

A Radio Science Experiment for Dragonfly to Investigate Titan's Rotation and Interior Structure

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract NASA's mission Dragonfly to Titan is scheduled for launch in 2028 with arrival in 2034 to study Titan's prebiotic chemistry and habitability. We propose a radio science experiment for Dragonfly, in which radiometric tracking of the rotorcraft from the Deep Space Network, already baselined for communications and navigation, is used as a ...
Flavio Petricca, Dustin Buccino
wiley   +1 more source

T1‐weighting in Steady‐State FLASH MRI–Diffusion Is Not Only Supportive but Mandatory for the Contrast

Magnetic Resonance in Medicine, Volume 96, Issue 4, Page 1789-1797, October 2026.
ABSTRACT Purpose FLASH imaging is widely assumed to produce a T1‐weighted steady‐state contrast using RF‐ and gradient‐spoiling. We observed substantial overestimation of CSF signals in simulations, when diffusion was neglected and realistic proton density was applied.
Simon Weinmüller, Deepak Charles Chellapandian, Jonathan Endres, Jochen Leupold, Florian Gritsch, Fabian Wagner, Rainer Schneider, Moritz Zaiss   +7 more
wiley   +1 more source