Results 81 to 90 of about 3,374,658 (295)

Metal enrichment by radiation pressure in active galactic nucleus outflows -- theory and observations

, 2012
Outflows from active galactic nuclei may be produced by absorption of continuum radiation by UV resonance lines of abundant metal ions, as observed in broad absorption line quasars (BALQs).
Alexei Baskin, Allen, Arav, Arav, Arav, Arav, Arav, Arav, Arav, Ari Laor, Baskin, Becker, Brandt, Brandt, Chelouche, Chelouche, Chelouche, Cottis, Crenshaw, Cresci, de Kool, Di, Diamond-Stanic, Dietrich, Elvis, Everett, Fabian, Ferland, Ferland, Gallazzi, Gibson, Hamann, Hamann, Hamann, Hamann, Hamann, Hamann, Jannuzi, Jones, Junkkarinen, Knigge, Korista, Kulsrud, Kurosawa, Kwan, Königl, Lamers, Laor, Laor, Molina, Moll, Morton, Murray, Owocki, Proga, Proga, Proga, Proga, Proga, Reeves, Reichard, Rodríguez, Rodríguez Hidalgo, Rybicki, Scaringi, Schneider, Shakura, Shen, Spitzer, Springmann, Stocke, Telfer, Vitello, Wang, Weymann, Wu, York, Yuan, Zaritsky   +78 more
core   +1 more source

Sources of error in UV radiation measurements

Journal of Research of the National Institute of Standards and Technology, 2001
Increasing commercial, scientific, and technical applications involving ultraviolet (UV) radiation have led to the demand for improved understanding of the performance of instrumentation used to measure this radiation. There has been an effort by manufacturers of UV measuring devices (meters) to produce simple, optically filtered sensor systems to ...
Larason, Thomas C., Cromer, Christopher L.   +1 more
openaire   +2 more sources

Water and Wastewater Disinfection with Peracetic Acid and UV Radiation and Using Advanced Oxidative Process PAA/UV

, 2015
The individual methods of disinfection peracetic acid (PAA) and UV radiation and combined process PAA/UV in water (synthetic) and sanitary wastewater were employed to verify the individual and combined action of these advanced oxidative processes on the ...
Jeanette Beber de Souza, Fernanda Queiroz Valdez, Rhuan Felipe Jeranoski, C. M. S. Vidal, G. Cavallini   +4 more
semanticscholar   +1 more source

Formation of Stable Amorphous Calcium Phosphate and Collagen Assemblies by a Versatile Spray‐Drying Approach

Advanced Functional Materials, EarlyView.
Amorphous calcium phosphate (ACP) microparticles with long‐term and thermal stability are prepared with or without collagen using a scalable one‐pot spray‐drying process. Under simulated physiological conditions, they crystallize into biomimetic bone mineral and, when combined with collagen, form extrudable, fibrillar bone‐like 3D constructs.
Camila Bussola Tovani, Nessma Bennaceur, Celina Benkhellat, Tristan Georges, Clara Doisneau, Vaskar Sardhalia, Thierry Azaïs, Flora Lemaire, Halima Kerdjoudj, Mohamed Selmane, Capucine Sassoye, Marie Albéric, Cédric Boissière, Nadine Nassif   +13 more
wiley   +1 more source

Ultraviolet radiation changes [PDF]

A major consequence of ozone depletion is an increase in solar ultraviolet (UV) radiation received at the Earth's surface. This chapter discusses advances that were made since the previous assessment (World Meteorological Organization (WMO)) to our ...
Blumthaler, M., Filyushkin, V., Frederick, John E., Ilyas, Mohammad, Madronich, Sasha, Mckenzie, Richard L., Muthusubramanian, P., Roy, Colin E., Stamnes, K., Wahner, Andreas   +9 more
core   +1 more source

From Single Atoms to Nanoparticles: Pathways Toward Efficient and Durable Pt/TiO2 Photocatalysts

Advanced Functional Materials, EarlyView.
Platinum single atoms on TiO2 nanosheets evolve into clusters and nanoparticles under ethanol photoreforming and thermal treatments. By controlling deposition and post‐treatments, particle size and location on specific facets are modulated. The study reveals how stability pathways determine efficiency, guiding the design of more durable photocatalysts.
Juan José Delgado, Enqi Bu, Yaning Han, Carlos López‐Cartes, Mónica Calatayud, Huiyan Pan, Xiaowei Chen   +6 more
wiley   +1 more source

UV-Radiation, Apoptosis and Skin

Collegium antropologicum, 2012
Apoptosis or programmed cell death is a key function in regulating skin development, homeostasis and tumorigenesis. The epidermis is exposed to various external stimuli and one of the most important is UV radiation. The UVA and UVB spectra differ in their biological effects and in their depth of penetration through the skin layers.
Šitum, Mirna, Pustišek, Nives
openaire   +2 more sources

Shaping Ti3C2 MXene Nanospheres for Precision Near‐Infrared Photothermal Therapy

Advanced Functional Materials, EarlyView.
In this study, we report producing spherical MXenes via fs laser fragmentation of Ti3C2 flakes in liquid medium. The nanoparticles demonstrated pronounced light absorption and high photothermal conversion efficiencies of 68% and 63% under heating with NIR‐I and NIR‐II lasers, respectively.
Julia S. Babkova, Ivan V. Zelepukin, Konstantin G. Shevchenko, Gleb V. Tikhonowski, Lyubov V. Gorelik, Anton A. Popov, Anna S. Sogomonyan, Alina Yu. Kapitannikova, Ivan S. Kazantsev, Dmitry V. Dyubo, Daria A. Panova, Daniil I. Tselikov, Anton A. Minnekhanov, Aziz B. Mirkasymov, Georgy A. Ermolaev, Alexander V. Syuy, Gleb I. Tselikov, Aleksey V. Arsenin, Andrei V. Kabashin, Kostya S. Novoselov, Sergey M. Deyev, Valentyn S. Volkov   +21 more
wiley   +1 more source

Ionization states of metallic absorption-line systems in continua of quasars [PDF]

Ionization states of metallic absorption-line systems in continua of quasars (QSO's) are studied, assuming that the metallic lines arise in gaseous halos of high-redshift galaxies in photoionization equilibrium under the background UV radiation, and ...
Denda, Kiyomi, Ikeuchi, Satoru
core   +1 more source

UV-Resistant Microbes and UV-Blocking Microbial Extract [PDF]

, 2017
The present disclosure relates to a composition including an extract from an Acidithiobacillus bacteria or a yeast extracted after exposure of the bacteria to UV radiation. The disclosure further relates to a method of preparing a UV-blocking composition
Cuero, Raul G., McKay, David S.
core   +1 more source