Results 91 to 100 of about 11,414 (233)

Symptom correlation and spatial distribution of inflammatory mediators in pulpitis—A preliminary study

open access: yesInternational Endodontic Journal, Volume 58, Issue 10, Page 1565-1581, October 2025.
Abstract Aim To evaluate the association of inflammatory mediators with clinical signs and symptoms and their spatial distribution in teeth with pulpitis. Methodology Fifty permanent teeth from adults with clinical diagnoses of normal pulp (n = 17), reversible pulpitis (n = 13) and symptomatic/asymptomatic irreversible pulpitis (n = 20), were recruited.
Ai Leen Shu Jen Loo   +6 more
wiley   +1 more source

OnAIR: Applications of the NASA on‐board artificial intelligence research platform

open access: yesAI Magazine, Volume 46, Issue 3, Fall 2025.
Abstract Infusing artificial intelligence algorithms into production aerospace systems can be challenging due to costs, timelines, and a risk‐averse industry. We introduce the Onboard Artificial Intelligence Research (OnAIR) platform, an open‐source software pipeline and cognitive architecture tool that enables full life cycle AI research for on‐board ...
Evana Gizzi   +30 more
wiley   +1 more source

A 3D Printing Strategy for Hard Curved Surfaced Circuits: From Materials to Applications

open access: yesAdvanced Science, Volume 12, Issue 36, September 25, 2025.
Conventional PCB etching (multi‐step) and indirect transfer techniques fail to meet structural electronics’ demands for lightweight, miniaturized, and customized manufacturing. 3D‐printed conformal circuits enable direct integration of conductive traces into substrates or onto surfaces, achieving integrated structural‐functional fabrication.
Wang Qin   +12 more
wiley   +1 more source

Biosignatures and tracers of life

open access: yes, 2023
Biosignatures are widely sought after within the solar system and exoplanet communities. But what are we talking about, when we talk about biosignatures? The concept of a “biosignature” is widely used to suggest a link between an observation and a biological cause, depending on the context.
ten Kate, Inge Loes   +13 more
openaire   +1 more source

Increased Stability in Carbon Isotope Records Reflects Emerging Complexity of the Biosphere

open access: yesFrontiers in Earth Science, 2019
Preference for certain stable isotopes (isotope fractionation) during enzyme-mediated reactions is a universal aspect of life. For instance, carbon isotopes are fractionated during anabolic (e.g., photosynthate production) and catabolic (e.g ...
Martin Schobben, Bas van de Schootbrugge
doaj   +1 more source

Microbialite cathodoluminescence: A tool for investigating palaeoredox conditions, alteration histories and primary textures across time

open access: yesThe Depositional Record, Volume 11, Issue 4, Page 1010-1028, September 2025.
Microbialites are common throughout the rock record and key to our understanding of Earth history, yet a relatively common microscopy technique—cathodoluminescence (CL)—has not previously been leveraged to understand them. In this contribution, we examine microbialites of varying ages (modern to Proterozoic) with CL and report on the patterns and ...
Cedric J. Hagen   +11 more
wiley   +1 more source

Assessing the utility of trace and rare earth elements as biosignatures in microbial iron oxyhydroxides

open access: yesFrontiers in Earth Science, 2015
Microbial iron oxyhydroxides are common deposits in natural waters, recent sediments and mine drainage systems and often contain significant accumulations of trace and rare earth elements (TREE). TREE patterns are widely used to characterize minerals and
Christine eHeim   +7 more
doaj   +1 more source

The “Analogs for VENus' GEologically Recent Surfaces” (AVENGERS) Initiative: Using Terrestrial Analogs to Study Recent Volcano‐Tectonic Activity on Venus and Inform the Characterization of Terrestrial Exoplanets

open access: yesJournal of Geophysical Research: Planets, Volume 130, Issue 9, September 2025.
Abstract Several missions to Venus have recently been selected for launch, opening a new era for the exploration of the planet. A key question these missions seek to address is whether Venus is geologically active today. Detecting active volcanism on Venus would contribute to a better understanding of volcanic and atmospheric processes on Earth.
P. D’Incecco   +55 more
wiley   +1 more source

Taphonomy of biosignatures in carbonate nodules from the Mars-analog Qaidam Basin: constraints from microscopic, spectroscopic, and geochemical analyses

open access: yesFrontiers in Astronomy and Space Sciences
Early diagenetic nodules with low permeable and weather-resistant structures are considered to be favorable for biosignature preservation. Numerous nodular structures forming in neutral-to-alkaline and saline diagenetic fluids were previously identified ...
Yan Chen, Zongjun Yin, Wei Lin
doaj   +1 more source

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