Results 41 to 50 of about 1,004,803 (344)

Finding Gravitational Lenses With X-rays [PDF]

, 1999
There are $\sim 1$, 0.1 and 0.01 gravitationally lensed X-ray sources per square degree with soft X-ray fluxes exceeding $10^{-15}, 10^{-14}$ and $10^{-13} ergs/s cm^{-2}$ respectively.
Boyle B. J., C. S. Kochanek, Cooray A. R., E. E. Falco, J. A. Muñoz, Jerius D., King L. J., Kochanek C. S.   +7 more
core   +3 more sources

Effects of Low-Dose X-Ray on Cell Growth, Membrane Permeability, DNA Damage and Gene Transfer Efficiency

Dose-Response, 2020
Background: We aimed to reveal if low dose X-rays would induce harmful or beneficial effect or dual response on biological cells and whether there are conditions the radiation can enhance gene transfer efficiency and promote cell growth but without ...
Zhuo Wang, Ming-Yue Lv, Yao-Xiong Huang
doaj   +1 more source

Comparative study between clinical diagnosis, plain radiography and sonography for the diagnosis of nontraumatic acute abdomen

Journal of Family Medicine and Primary Care, 2022
Background: Acute abdomen is the most commonly attended surgical emergency. It can be caused by intra-abdominal, extra-abdominal and metabolic causes.
Pradeep Sharma, Rajan Sood, Mukul Sharma, Arun K Gupta, Arun Chauhan   +4 more
doaj   +1 more source

Reflection of X-Rays and X-Ray Fringes [PDF]

Nature, 1913
ACCOUNTS of the reflection of X-rays and of X-ray fringes contributed to NATURE by Messrs. Bragg, Moseley, Barkla, Hupke, Keene, and others induce me to send you some results that I have obtained recently in the same direction.
openaire   +2 more sources

The X-ray properties of Be/X-ray pulsars in quiescence [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
18 pages, 4 figures, 3 tables, accepted by ...
Sergey S. Tsygankov, Alexander A. Lutovinov, Alexander A. Lutovinov, Rudy Wijnands, Juri Poutanen, Juri Poutanen, Juri Poutanen, Nathalie Degenaar   +7 more
openaire   +6 more sources

The intracellular domain of TLR2 is capable of high‐affinity Zn binding: possible outcomes for the receptor activation

FEBS Letters, EarlyView.
Toll‐like receptors (TLRs) are important in the innate immune system. This study explores the zinc‐binding ability of the TLR2 TIR domain (TLR2TIR). We found that TLR2TIR binds zinc with nanomolar affinity through its cysteine residues. Two of them, C673 and C713, are vital for receptor activation, indicating that zinc may play a role in initiating ...
Vladislav A. Lushpa, Cong Lin, Irina A. Talyzina, Marina V. Goncharuk, Eduard V. Bocharov, Alexander S. Arseniev, Xiaohui Wang, Sergey A. Goncharuk, Konstantin S. Mineev   +8 more
wiley   +1 more source

Extended range X-ray telescope [PDF]

, 1981
An X-ray telescope system is described which is comprised of a tubular mount having a collecting region remote from the one axial end. A soft X-ray/XUV subsystem associated with the collecting region directs only relatively soft, near on-axis X-rays/XUV ...
Hoover, R. B.
core   +1 more source

On the Role of Reduced Air Density Along the Lightning Leader Path to Ground in Increasing X‐Ray Production Relative to Normal Atmospheric Conditions

Geophysical Research Letters, 2019
Mallick et al. (2012, https://doi.org/10.1029/2012JD017555) discovered that subsequent‐stroke leaders in natural negative lightning could be more prolific producers of hard X‐rays and gamma rays than the first‐stroke leader in the same flash.
M. D. Tran, I. Kereszy, V. A. Rakov, J. R. Dwyer   +3 more
doaj   +1 more source

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source

Looking Back: Unneeded X-rays [PDF]

, 2000
From the discovery of x-rays in 1896 to the present, Dr.
Mazur, Allan
core   +1 more source