Results 31 to 40 of about 30,551 (141)

Aligned hydrothermal fluid‐flow pathways in Middle Permian near‐shore marine sediments beneath a basaltic lava flow

open access: yesSedimentology, Volume 73, Issue 1, Page 83-102, January 2026.
ABSTRACT Tubular and curviplanar structures, outlined by the occurrence of haematite/goethite, chlorite, quartz and albite, are developed in the Middle Permian Broughton Formation in the southern Sydney Basin, New South Wales, Australia. These structures are interpreted as fluid‐flow pathways resulting from the ejection of heated pore fluids as a thick
Paul F. Carr   +5 more
wiley   +1 more source

Stable Carbon Isotope Analysis of Perfluorooctanoic Acid (PFOA) by Microflow‐High Pressure Liquid Chromatography‐Orbitrap Mass Spectrometry

open access: yesRapid Communications in Mass Spectrometry, Volume 39, Issue 24, 30 December 2025.
ABSTRACT Rationale As contamination of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in the environment becomes better understood, it is increasingly important to develop forensic tools capable of tracing contamination to emission sources. Isotopic methods have been previously inaccessible for PFAS due to limitations of the instrumentation, but ...
Paul K. Wojtal   +3 more
wiley   +1 more source

The Effect of Barotropic Instability on Mixed Rossby‐Gravity Wave Variability During the QBO Phases

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 24, 28 December 2025.
Abstract The traditional view posits that vertically propagating mixed Rossby‐gravity (MRG) waves generated in the troposphere partly contribute to driving the Quasi‐Biennial Oscillation (QBO) in the tropical lower stratosphere. However, recent studies suggest that MRG waves may be generated locally within the QBO region, potentially via barotropic ...
S. I. Mahó   +3 more
wiley   +1 more source

Landscape features and seasonal habitat predict lek site selection and lek size of a Tympanuchus grouse

open access: yesEcosphere, Volume 16, Issue 12, December 2025.
Abstract The lek hotspot hypothesis predicts that leks will form in areas where males are more likely to encounter females, providing wildlife managers with a framework supporting the use of leks as the focus for prairie and shrubland grouse conservation and monitoring.
Jonathan D. Lautenbach   +2 more
wiley   +1 more source

A chemical ionization mass spectrometer for continuous underway shipboard analysis of dimethylsulfide in near-surface seawater [PDF]

open access: yes, 2009
A compact, low-cost atmospheric pressure, chemical ionization mass spectrometer ("mini-CIMS") has been developed for continuous underway shipboard measurements of dimethylsulfide (DMS) in seawater.
de Bruyn, W. J.   +4 more
core   +2 more sources

A Validated GC‐MS Method for Major Terpenes Quantification in Hydrodistilled Cannabis sativa Essential oil

open access: yesPhytochemical Analysis, Volume 36, Issue 8, Page 2362-2373, December 2025.
ABSTRACT Introduction Terpenes, which are found in high concentrations in the essential oil fraction of the Cannabis sativa flower, have demonstrated potential in many therapeutic and industrial applications. Objectives This work reports on a method developed for quantifying 18 terpenes in C. sativa essential oil obtained through hydrodistillation. The
Noelle Joy   +2 more
wiley   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès   +10 more
wiley   +1 more source

Automatic Analysis of Hydroacoustic Signals Related to the Activity of the Fani Maoré Submarine Volcano

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Due to the properties of sound propagation underwater, including the existence of the SOFAR channel, sounds in the ocean can propagate over large distances with little attenuation. This makes passive acoustics a relevant method for monitoring natural events such as ice calving, earthquakes, and underwater volcanic eruptions.
Pierre‐Yves Raumer   +4 more
wiley   +1 more source

Case of plumbing in India [PDF]

open access: yes, 2013
Thesis (S.M. in Management Research)--Massachusetts Institute of Technology, Sloan School of Management, 2013.Cataloged from PDF version of thesis.Includes bibliographical references (p.
Ranganathan, Aruna
core  

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