Results 21 to 30 of about 452,874 (311)

Ultraviolet renormalon reexamined [PDF]

Physical Review D, 1996
We consider large-order perturbative expansions in QED and QCD. The coefficients of the expansions are known to be dominated by the so called ultraviolet (UV) renormalons which arise from inserting a chain of vacuum-polarization graphs into photonic (gluonic) lines.
Vainshtein, A. I., Zakharov, V. I.
openaire   +3 more sources

Upper-Room Ultraviolet Light and Negative Air Ionization to Prevent Tuberculosis Transmission [PDF]

, 2009
Background Institutional tuberculosis (TB) transmission is an important public health problem highlighted by the HIV/AIDS pandemic and the emergence of multidrug- and extensively drug-resistant TB.
Ticona, E., Gilman, RH, Navincopa, Marcos, Gilman, R.H., Noakes, Catherine, Carlton A Evans, Patricia Sheen, Gilman Robert H, Gonzalez Armando, Ticona, Eduardo, Gonzalez, A, Mitchell, B., Ramirez, R., Moore, David AJ, Sheen, Patricia, Willi Quino, Mitchell Bailey, Noakes Catherine, Quino Willi, Robert H Gilman, Quino, W, Sheen Patricia, Rocio Ramirez, Armando Gonzalez, Navincopa, M., Sheen, P, Jon S Friedland, A Roderick Escombe, Gilman, Robert H, Martínez Carlos, Martinez, C, Ramirez, Rocio, Escombe, AR, Mitchell, Bailey, Evans, Carlton A, Gonzalez, A., Friedland, Jon S, Navincopa, M, Escombe A. Roderick, Noakes, CJ, Martínez, Carlos, Ramirez, R, Evans, CA, Evans, C.A., Quino, Willi, Bailey Mitchell, Carlos Martínez, Moore, D.A.J., Moore, DAJ, Catherine Noakes, Escombe, A.R., Friedland, J.S., Ticona, E, Moore David A. J, Mitchell, B, Navincopa Marcos, Noakes, C, David A J Moore, Ramirez Rocio, Quinow, W., Friedland Jon S, Noakes, C.J., Sheen, P., Friedland, JS, Martinez, C., Ticona Eduardo, Marcos Navincopa, Evans Carlton A, Gonzalez, Armando, Eduardo Ticona, Escombe, A Roderick   +70 more
core   +1 more source

Ultraviolet radiation

Chronic Diseases and Injuries in Canada, 2010
The major source of ultraviolet radiation is solar radiation or sunlight. However, exposure to artificial sources particularly through tanning salons is becoming more important in terms of human health effects, as use of these facilities by young people, has increased.
Richard P, Gallagher, Tim K, Lee, Chris D, Bajdik, Marilyn, Borugian   +3 more
openaire   +2 more sources

Coupling adsorption by NiO nanopowder with UV/H2O2 process for Cr(VI) removal [PDF]

Journal of Advances in Environmental Health Research, 2017
Chromium enters surface and ground waters through the wastewater of electroplating, textile, metallurgical, dye production, and other industries, leading to numerous adverse health effects.
Majid Hashemi, Mohammad Mehdi Amin, Sepideh Sadeghi, Nezamadin Menglizadeh, Farzaneh Mohammadi, Saeed Patastar, Afsaneh Chavoshani, Shima Rezaei   +7 more
doaj   +1 more source

Spectral Observation of Solar Photosynthetically Active Radiation on Clear Days in Qinghai-Xizang Plateau

Gaoyuan qixiang
Photosynthetically Active Radiation （PAR） spectrum， in visible light， is the wavelength range sensitive to plants and can be absorbed by them for photosynthesis.The characteristics of ground PAR spectrum directly affect the growth， development ...
Min SHENG, Tsoja WANGMO, Mengmeng WANG, Yi ZHOU, Dopwang PU, Tunzhup LAGBA, Gelsor NORSANG   +6 more
doaj   +1 more source

THE PERMEABILITY OF THE SCLERAL TISSUE FOR ULTRAVIOLET A IN THE EXPERIMENT

Oftalʹmologiâ, 2017
Purpose: to evaluate the permeability of the scleral tissue for ultraviolet A (UVA).Materials and Methods. The study was conducted on 15 cadaver porcine eyes. Rectangular scleral flap 12*15 mm was cut out from each eyeball.
M. M. Bikbov, V. K. Surkova, E. L. Usubov, S. V. Kharitonov, A. B. Simonov, M. N. Astrelin   +5 more
doaj   +1 more source

Bat eyes have ultraviolet-sensitive cone photoreceptors

, 2009
Mammalian retinae have rod photoreceptors for night vision and cone photoreceptors for daylight and colour vision. For colour discrimination, most mammals possess two cone populations with two visual pigments (opsins) that have absorption maxima at short
Josef Ammermüller, Leo Peichl, Ammermüller Josef, Knop Gabriel C., Peichl, Leo, Glösmann, Martin, Brigitte Müller, Müller Brigitte, Hagemann Cornelia, Knop, Gabriel C., Glösmann, M., Hagemann, Cornelia, Knop, G., Ammermüller, J., Glösmann Martin, Müller, B., Hagemann, C., Martin Glösmann, Ammermüller, Josef, Müller, Brigitte, Peichl Leo, Gabriel C Knop, Cornelia Hagemann, Peichl, L.   +23 more
core   +1 more source

Enhancing Light Extraction Efficiency of Vertical Emission of AlGaN Nanowire Light Emitting Diodes With Photonic Crystal

IEEE Photonics Journal, 2019
AlGaN alloys have been widely used to make ultraviolet light-emitting diodes (UV-LEDs) because its energy bandgap covers 200–360 nm wavelength range.
Pengwei Du, Zhiyuan Cheng
doaj   +1 more source

Studying the Nonlinear Optical Properties of Fluoride Laser Host Materials in the Ultraviolet Wavelength Region

Applied Sciences, 2021
Fluoride host materials doped with trivalent cerium ions have previously been demonstrated as successful laser materials in the ultraviolet wavelength region.
Duong Van Pham, Diep Van Nguyen, Tu Xuan Nguyen, Kieu Anh Thi Doan, Quan Minh Le, Minh Hong Pham, Marilou Cadatal-Raduban   +6 more
doaj   +1 more source

Verdet constant dispersion of magnesium fluoride for deep-ultraviolet and vacuum-ultraviolet Faraday rotators

, 2023
0000-0002-7220-0613The Verdet constant dispersion in magnesium fluoride (MgF2) crystals was evaluated over a wavelength range of 190–300 nm. The Verdet constant was found to be 38.7 rad/(T·m) at a wavelength of 193 nm. These results were fitted using the
UEHARA, Hiyori, MIURA, Taisuke, YASUHARA, Ryo, TAMARU, Yuki, FUCHIMUKAI, Atsushi   +4 more
core   +1 more source