Results 41 to 50 of about 86,059 (172)
Surprisingly Enriched CO and CH4 in Halley-type Comet 13P/Olbers: Clues to Its Interstellar Heritage
The Planetary Science JournalThe native ice composition of Halley-type Comet 13P/Olbers (hereafter 13P) was measured post-perihelion, on UT 2024 August 16 using iSHELL, the 1–5 μ m cross-dispersed, high-resolution facility spectrograph at the NASA InfraRed Telescope Facility.
Michael A. DiSanti +11 more
doaj +1 more source
The Effects of Early Collisional Evolution on Amorphous Water Ice Bodies
The Planetary Science Journal, 2023 Conditions in the outer protoplanetary disk during solar system formation were thought to be favorable for the formation of amorphous water ice (AWI), a glassy phase of water ice.
Jordan K. Steckloff +2 more
doaj +1 more source
Journal of Applied Toxicology, EarlyView.ABSTRACT Children, as a particularly vulnerable group, are more susceptible to these mutagens due to their developing immune systems, higher physiological vulnerability, and increased exposure through behaviors like outdoor play and hand‐to‐mouth activities. This review aims to investigate the relationship between these environmental exposures, genetic
Thiago Guedes Pinto +7 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner +7 more
wiley +1 more source
Singularities in mass-loaded MHD flow: The cometary bow shock [PDF]
, 1991 We present a one-dimensional model of the mass-loading of the solar wind by cometary ions which predicts a singularity in the mass-loaded flow at M = 2. Further, a subshock occurs when the flow speed reaches M almost-equal-to 1.15.
A. J. Coates +5 more
core +1 more source
The Planetary Science JournalComets, as remnants of the solar system’s formation, vary in volatile-refractory content. In situ comet studies, such as the Rosetta mission to 67P/Churyumov–Gerasimenko, provide detailed volatile composition insights, while ground-based studies offer ...
Mohammad Saki +7 more
doaj +1 more source
Journal of Applied Polymer Science, Volume 143, Issue 40, October 20, 2026.Driven by the need for more sustainable materials in the laminate industry, poly(glycerol citrate) was introduced as a bio‐based modifier that significantly altered the cure kinetics and structural evolution of melamine–formaldehyde resins. Correlated FTIR, DSC, TGA, and rheological analyses revealed accelerated network formation, enabling lower ...
Martina Duller +3 more
wiley +1 more source
, 2015 International audienceThe European Space Agency’s Rosetta spacecraft is in close proximity of comet 67P/Churyumov-Gerasimenko for well over a year now. During this time Rosetta followed the comet from almost 3.5 AU through perihelion at 1.25 AU and away ...
Mall, Urs +17 more
core +6 more sources
The Planetary Science JournalObserving [O i ] emission to calculate an oxygen line ratio has been proposed as a potential proxy for direct CO _2 measurement in comets. However, the photochemistry governing [O i ] release into the coma is not well understood, and using theoretical ...
Ella J. Mayfield +3 more
doaj +1 more source
Journal of Applied Polymer Science, Volume 143, Issue 39, October 15, 2026.This study systematically maps polyolefin dilution dynamics using a homologous series of n‐alkanes. Integrating gravimetric sorption, subsequent controlled desorption, and oscillatory rheometry establishes a precise framework to analyze reduction in viscosity at least for polymer diluent mixtures with polymer concentration > 35% and diluent ...
Ernst Georg Viehböck +6 more
wiley +1 more source