Results 101 to 110 of about 110,927 (295)
A CSF Background Suppression Scheme in Arterial Spin Labeling MRI
NMR in Biomedicine, Volume 39, Issue 1, January 2026.Arterial spin labeling MRI suffers from signal instability due to CSF pulsation, which are not fully addressed by conventional tissue‐focused background suppression (BS). We developed a CSF BS scheme and demonstrated its advantages in both single‐ and multi‐delay ASL.
Zhiyi Hu +6 more
wiley +1 more source
Comprehensive Connection among the Quasars with Different Types of Outflow Absorption Lines
The Astrophysical JournalIt is commonly accepted that outflows from the central regions of quasars play a substantial role in regulating the global properties of the host galaxy. These outflows are typically detected through blueshifted absorption lines.
Xing-Long Peng +4 more
doaj +1 more source
Infrared properties of serendipitous X-ray quasars [PDF]
, 1982 Near infrared measurements were obtained of 30 quasars originally found serendipitously as X-ray sources in fields of other objects. The observations show that the infrared characteristics of these quasars do not differ significantly from those of ...
Chanan, G. A. +4 more
core +1 more source
Optical and radio properties of giant radio quasars: Central black hole characteristics
, 2012 We analysed the optical and radio properties of lobe-dominated giant-sized (> 0.72 Mpc) radio quasars and compared the results with those derived for a sample of smaller radio sources to determine whether the large size of some extragalactic radio ...
Jamrozy, M., Kuźmicz, A.
core +1 more source
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 +7 more
wiley +1 more source
Narrow [O iii] Emission Lines as a Potential Proxy for the Evolutionary Stage of Quasars
The Astrophysical JournalRadio spectral shape of quasars can provide insight into the ages of quasars. We have compiled data for 1804 quasars with z ≲ 1 from the Sloan Digital Sky Survey (SDSS).
Zhi-fu Chen +3 more
doaj +1 more source
Fundamental differences in the properties of red and blue quasars: measuring the reddening and accretion properties with X-shooter [PDF]
, 2022 V. A. Fawcett +6 more
openalex +1 more source
Chemistry–Methods, Volume 5, Issue 12, November 2025.LaB6 surface modification of PA12 enables efficient NIR diode laser PBF‐LB processing, with enhanced tensile strength and tailored microstructures achieved at minimal additionaly energy. By reducing the need for high filler content, this approach expands the options and performance levels of advanced industrial‐grade polymer additive manufacturing. The
Nadine Stratmann +8 more
wiley +1 more source
The Study of the Circumgalactic Medium with Quasar Pairs
The Astrophysical Journal Supplement Series, 2023 We have collected 10,025 foreground–background quasar pairs with projected distances d _p < 500 kpc from the large quasar catalog of the Sloan Digital Sky Survey DR16Q. We investigate the properties of the Mg ii absorption lines with W _r > 0.15 Å around
Zhi-Fu Chen +7 more
doaj +1 more source
Luminous Quasars Do Not Live in the Most Overdense Regions of Galaxies at z~4
, 2017 We present the cross-correlation between 151 luminous quasars ($M_{ \mathrm{UV}} < -26$) and 179 protocluster candidates at $z \sim 3.8$, extracted from the Wide imaging survey ($ \sim 121~ $deg$^2$) performed with a part of the Hyper Suprime-Cam Subaru ...
Akiyama, Masayuki +24 more
core +1 more source