Results 81 to 90 of about 2,405 (218)

Characterization of the Nature of Organic Matter in Carbonate Rocks: Implications for Geological and Environmental Studies

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 3, March 2026.
Abstract Organic matter in carbonate rocks plays a crucial role in processes such as fluid flow regulation, carbon sequestration, contaminant transport, and hydrocarbon recovery. This study employed multimodal spectroscopic techniques, including fluorescence imaging and Fourier transform infrared (FTIR) spectroscopy, to characterize the spatial ...
Alicia Moya, Rajkumar Chowdhury, Yves Perrette, Fabienne Giraud, Laurent Charlet, Christophe Sandt, Hugo Chauvet, Frederic Jamme, Alexander Van Driessche, Alejandro Fernandez‐Martinez   +9 more
wiley   +1 more source

The SDSS-V Black Hole Mapper Reverberation Mapping Project: C iv Broad Absorption Line Acceleration in the Quasar SBS 1408+544

The Astrophysical Journal
We present the results of an investigation of a highly variable C iv broad absorption line (BAL) feature in spectra of the quasar SBS 1408+544 ( z = 2.337) that shows a significant shift in velocity over time.
Robert Wheatley, Catherine J. Grier, Patrick B. Hall, W. N. Brandt, Jonah Lotz, D. P. Schneider, Jonathan R. Trump, Yue Shen, Lucas M. Seaton, Scott F. Anderson, Matthew J. Temple, Roberto Assef, Logan B. Fries, Y. Homayouni, Darshan Kakkad, Anton M. Koekemoer, Mary Loli Martínez-Aldama, C. Alenka Negrete, Claudio Ricci, Dmitry Bizyaev, Joel R. Brownstein, Sean Morrison, Kaike Pan   +22 more
doaj   +1 more source

Formation of Condition‐Dependent Alpha‐Synuclein Fibril Strain in Artificial Cerebrospinal Fluid

Advanced Science, Volume 13, Issue 7, 3 February 2026.
α‐synuclein aggregation in artificial cerebrospinal fluid (aCSF) leads to a distinct conformation with an electron density pocket motif found in aggregates from PD and MSA patients. Such fibrils has low stability outside the reaction conditions, hinting about the influence of cerebrospinal fluid components not only on the formation, but also on the ...
Rūta Sniečkutė, Darius Šulskis, Arūnė Jocytė, Urtė Venclovaitė, Rimgailė Tamulytė, Mantas Žiaunys, Vytautas Smirnovas, Andrius Sakalauskas   +7 more
wiley   +1 more source

The Marriage of Metal Nanoclusters With Reticular Frameworks: Synthetic Strategies and Biomedical Applications

Aggregate, Volume 7, Issue 2, February 2026.
The integration of metal nanoclusters (MNCs) with reticular frameworks (RFs) has recently emerged as a powerful strategy to create composite materials with enhanced and synergistic functionalities. This review provides an overview of the synthetic strategies developed for constructing MNCs/RFs composites and their recent advances in biomedical ...
Wenfeng Liu, Qinyin Yin, Li‐Li Tan, Li Shang   +3 more
wiley   +1 more source

Massive Extremely High-velocity Outflow in the Quasar J164653.72+243942.2

The Astrophysical Journal
We present analysis of one of the most extreme quasar outflows found to date in our survey of extremely high-velocity outflows (EHVOs). J164653.72+243942.2 ( z _em  ∼ 3.04) shows variable C iv λλ 1548,1551 absorption at speeds larger than 0.1 c ...
Paola Rodríguez Hidalgo, Hyunseop Choi, Patrick B. Hall, Karen M. Leighly, Liliana Flores, Mikel M. Charles, Cora DeFrancesco, Julie Hlavacek-Larrondo, Laurence Perreault-Levasseur   +8 more
doaj   +1 more source

Variability in Quasar Broad Absorption Line Outflows

, 2012
5 pages, proceedings for the conference "AGN Winds in Charleston", Charleston, S.C ...
Capellupo, Daniel M., Hamann, Fred, Shields, Joseph C., Halpern, Jules, Hidalgo, Paola Rodríguez, Barlow, Tom A.   +5 more
openaire   +2 more sources

Properties of X-ray-selected broad absorption-line quasars^★ [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
13 pages, 8 figures, accepted for publication in ...
Blustin, A. J., Dwelly, T., Page, M. J., McHardy, I. M., Seymour, N., Kennea, J. A., Loaring, N. S., Mason, K. O., Sekiguchi, K.   +8 more
openaire   +5 more sources

Machine Learning–Driven Near‐ and Mid‐Infrared Chemometrics for Rapid, Cost‐Effective COVID‐19 Screening in Dried Plasma

Journal of Chemometrics, Volume 39, Issue 12, December 2025.
ABSTRACT The COVID‐19 pandemic has highlighted the urgent need for rapid, accurate, and cost‐effective diagnostic alternatives to conventional methods such as RT‐qPCR and immunoassays. In this study, we explored the potential of vibrational spectroscopy, specifically near‐infrared (NIR) and mid‐infrared (MID) spectroscopy, for detecting SARS‐CoV‐2 ...
Fernanda F. S. Oliveira, Wilson J. Cardoso, Luiz F. P. Ramos, Túlio R. Freitas, Priscilla S. Filgueiras, Rafaella F. Q. Grenfell, Reinaldo F. Teófilo, Adriano de Paula Sabino   +7 more
wiley   +1 more source

EXOSAT observations of a broad absorption-line quasar: PHL 5200

, 1987
In our observations of the 45' (FWHM) region centered on a broad absorption-line quasar PHL 5200 perfor- med with the medium energy (ME) and low energy (LE) experiments on board EXOSAT Observatory we have detected X-ray emission in the 2-6 keV energy ...
Singh, K. P., Westergaard, N. J., Schnopper, H. W.   +2 more
core   +1 more source

On the polarization of resonantly scattered emission lines -- III. Polarization of quasar broad emission lines and broad absorption line troughs [PDF]

, 1997
The contribution to the expected linear polarization of quasar broad emission and absorption lines from resonance scattering is computed using a Monte Carlo approach for specific, generic models.
Blandford, R. D., Lee, H.-W.
core