Results 21 to 30 of about 3,641,335 (326)
Sub-GeV flashes in $γ-$ray burst afterglows as probes of underlying bright UV flares [PDF]
Mon.Not.Roy.Astron.Soc.Lett. 370 (2006) L24-L28, 2006 Bright optical and X-ray flares have been observed in many Gamma-ray Burst (GRB) afterglows. These flares have been attributed to late activity of the central engine. In most cases the peak energy is not known and it is possible and even likely that there is a significant far-ultraviolet component.
arxiv +1 more source
BioMed Research International, 2015 Hosts' innate defense systems are upregulated by antimicrobial peptide elicitors (APEs). Our aim was to investigate the effects of hyperthermia, ultraviolet A rays (UVA), and ultraviolet C rays (UVC) as well as glucose and ascorbic acid (AA) on the ...
Luis Antonio Cruz Díaz +5 more
semanticscholar +1 more source
Sunscreens: Time to think beyond UV rays
Pigment International, 2018 It has been known to us that solar radiation contributes to photoaging. Until recently, it was thought to be due to ultraviolet rays alone. However, a growing number of evidence confirms that visible and infrared (IR) rays also contribute to extrinsic ...
Chitralekha Keisham +2 more
doaj +1 more source
The effects of tanning on health
Journal of Education, Health and Sport, 2017 Ultraviolet (UV) ray exposure can lead to serious consequences to a person(s) health. Consequences include skin pigmentation and can also lead to cancer. Not everyone however is aware of the risks involved with exposure to these rays.
Irena Puszkarz +2 more
doaj +3 more sources
Some of the uses of ultra-violet rays in dermatology
South African Journal of Physiotherapy, 1953 No abstract available.
R. M.B MacKenna, T. Wareham
doaj +1 more source
Alexandria Engineering Journal, 2021 Up to day, the role of ultraviolet rays in producing cancers like melanoma has been considered extensively. However, quantum effects on the evolutions of melanoma has been discussed minorly.
S.K. Elagan +4 more
doaj
HARPO: a TPC as a gamma-ray telescope and polarimeter [PDF]
Proc. SPIE 9144, Space Telescopes and Instrumentation 2014:
Ultraviolet to Gamma Ray, 91441M (July 24, 2014), 2014 A gas Time Projection Chamber can be used for gamma-ray astronomy with excellent angular-precision and sensitivity to faint sources, and for polarimetry, through the measurement of photon conversion to $e^+e^-$ pairs. We present the expected performance in simulations and the recent development of a demonstrator for tests in a polarized photon beam.
arxiv +1 more source
X-ray and gamma-ray orbital variability from the gamma-ray binary HESS J1832-093 [PDF]
A&A 637, A23 (2020), 2020 Context. Gamma-ray binaries are systems composed of a massive star and a compact object whose interaction leads to particle acceleration up to relativistic energies. In the last fifteen years, a few binaries have been discovered to emit at high energies, but their number is still scarce.
arxiv +1 more source
Potensi Ekstrak Bawang Hitam sebagai Tabir Surya terhadap Paparan Sinar Ultraviolet
Keluwih, 2020 —Skin cancer is in the third rank in Indonesia. One of the causes of skin cancer is excessive exposure to ultraviolet rays from the sun. Ultraviolet radiation forms Reactive Oxygen Species that disrupts the regulation of the cell-matrix and causes ...
Putu Srinata Dampati, Elvina Veronica
doaj +1 more source
Sun exposure, skin lesions and vitamin D production: evaluation in a population of fishermen [PDF]
Anais Brasileiros de Dermatologia, 2019 : Background: Exposure to UVR provides benefits related to vitamin D synthesis, but also causes harms, since UVB is considered a complete carcinogen.
Roberta Cavalcanti Soriano Coutinho +3 more
doaj +1 more source