Relevant bibliographies by topics / Solar UV radiation

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Solar UV radiation'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Solar UV radiation"

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de Gruijl, F. R. "Skin cancer and solar UV radiation." European Journal of Cancer 35, no. 14 (December 1999): 2003–9. http://dx.doi.org/10.1016/s0959-8049(99)00283-x.

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de Gruijl, F. R. "Health Effects from Solar UV Radiation." Radiation Protection Dosimetry 72, no. 3 (August 1, 1997): 177–96. http://dx.doi.org/10.1093/oxfordjournals.rpd.a032090.

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Sionkowska, Alina, Marcin Wisniewski, Joanna Skopinska, and Diego Mantovani. "Effects of solar radiation on collagen-based biomaterials." International Journal of Photoenergy 2006 (2006): 1–6. http://dx.doi.org/10.1155/ijp/2006/29196.

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The effect of solar radiation on collagen and collagen/synthetic polymer blends in the form of thin films and solutions has been studied by UV-VIS and FTIR spectroscopies. Films and solutions of collagen blended with poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) were irradiated by solar light. It was found that UV-VIS spectra, which characterize collagen, collagen/PVA, and collagen/PVP blended films, were significantly altered by solar radiation. FTIR spectra of collagen, collagen/PVA, and collagen/PVP films showed that after solar irradiation, the positions of Amide A bands were shifted to lower wavenumbers. There was not any significant alteration in the position of Amide I and Amide II bands of collagen and its blends after solar radiation. The effect of solar UV radiation in comparison with artificial UV radiation has been discussed.
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Rai, Neha, Luis Orlando Morales, and Pedro José Aphalo. "Perception of solar UV radiation by plants: photoreceptors and mechanisms." Plant Physiology 186, no. 3 (April 7, 2021): 1382–96. http://dx.doi.org/10.1093/plphys/kiab162.

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Abstract About 95% of the ultraviolet (UV) photons reaching the Earth’s surface are UV-A (315–400 nm) photons. Plant responses to UV-A radiation have been less frequently studied than those to UV-B (280–315 nm) radiation. Most previous studies on UV-A radiation have used an unrealistic balance between UV-A, UV-B, and photosynthetically active radiation (PAR). Consequently, results from these studies are difficult to interpret from an ecological perspective, leaving an important gap in our understanding of the perception of solar UV radiation by plants. Previously, it was assumed UV-A/blue photoreceptors, cryptochromes and phototropins mediated photomorphogenic responses to UV-A radiation and “UV-B photoreceptor” UV RESISTANCE LOCUS 8 (UVR8) to UV-B radiation. However, our understanding of how UV-A radiation is perceived by plants has recently improved. Experiments using a realistic balance between UV-B, UV-A, and PAR have demonstrated that UVR8 can play a major role in the perception of both UV-B and short-wavelength UV-A (UV-Asw, 315 to ∼350 nm) radiation. These experiments also showed that UVR8 and cryptochromes jointly regulate gene expression through interactions that alter the relative sensitivity to UV-B, UV-A, and blue wavelengths. Negative feedback loops on the action of these photoreceptors can arise from gene expression, signaling crosstalk, and absorption of UV photons by phenolic metabolites. These interactions explain why exposure to blue light modulates photomorphogenic responses to UV-B and UV-Asw radiation. Future studies will need to distinguish between short and long wavelengths of UV-A radiation and to consider UVR8’s role as a UV-B/UV-Asw photoreceptor in sunlight.
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Letic, Milorad. "Determination of the need for solar UV radiation protection." Srpski arhiv za celokupno lekarstvo 138, no. 11-12 (2010): 752–54. http://dx.doi.org/10.2298/sarh1012752l.

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Introduction. Effects of ultraviolet radiation on the skin, the eyes and the immune system are well known. The need for UV radiation protection is popularized by the introduction of UV index. Uneven intensity of UV radiation in different regions in different periods of the year and in different times of the day requires that recommendations for UV radiation protection are given for possible UV index values in those regions. Objective. The aim of the study is to establish a simple and consistent method for the determination of the need for UV radiation protection in Serbia where UV radiation intensity can be approximated as uniform. Methods. Possible values of UV index during the year and the sun elevation during the day in periods throughout the year were used for the determination of maximal possible UV index values. These values were compared to UV index forecasts regarding UV radiation protection. Results. Maximal possible values for UV index were used for producing the colour graph. Colours on the graph indicate the need for UV radiation protection. Green - protection is not needed, yellow - protection is needed, red - protection is obligatory. Comparisons with the need for protection based on forecasts showed congruence in 97% of cases. Conclusion. The use of the graph for the determination of the need for UV radiation protection gives nearly the same results as recommendations based on UV index forecasts. The advantages of the graph are that it gives recommendations for the whole year, for the time intervals during the day in every period of the year and for the whole territory of Serbia.
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du Preez, David J., Jelena V. Ajtić, Hassan Bencherif, Nelson Bègue, Jean-Maurice Cadet, and Caradee Y. Wright. "Spring and summer time ozone and solar ultraviolet radiation variations over Cape Point, South Africa." Annales Geophysicae 37, no. 2 (March 6, 2019): 129–41. http://dx.doi.org/10.5194/angeo-37-129-2019.

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Abstract. The correlation between solar ultraviolet radiation (UV) and atmospheric ozone is well understood. Decreased stratospheric ozone levels which led to increased solar UV radiation levels at the surface have been recorded. These increased levels of solar UV radiation have potential negative impacts on public health. This study was done to determine whether the break-up of the Antarctic ozone hole has an impact on stratospheric columnar ozone (SCO) and resulting ambient solar UV-B radiation levels at Cape Point, South Africa, over 2007–2016. We investigated the correlations between UV index, calculated from ground-based solar UV-B radiation measurements and satellite-retrieved column ozone data. The strongest anti-correlation on clear-sky days was found at solar zenith angle 25∘ with exponential fit R2 values of 0.45 and 0.53 for total ozone column and SCO, respectively. An average radiation amplification factor of 0.59 across all SZAs was calculated for clear-sky days. The MIMOSA-CHIM model showed that the polar vortex had a limited effect on ozone levels. Tropical air masses more frequently affect the study site, and this requires further investigation.
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Blumthaler, M., W. Ambach, and R. Ellinger. "Increase in solar UV radiation with altitude." Journal of Photochemistry and Photobiology B: Biology 39, no. 2 (June 1997): 130–34. http://dx.doi.org/10.1016/s1011-1344(96)00018-8.

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Stahl, Wilhelm, and Helmut Sies. "Carotenoids and Protection against Solar UV Radiation." Skin Pharmacology and Physiology 15, no. 5 (2002): 291–96. http://dx.doi.org/10.1159/000064532.

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Muñoz, E., E. Monroy, F. Calle, F. Omnès, and P. Gibart. "AlGaN Photodiodes For Monitoring Solar UV Radiation." Journal of Geophysical Research: Atmospheres 105, no. D4 (February 1, 2000): 4865–71. http://dx.doi.org/10.1029/1999jd900939.

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Tyrrell, R. M. "Interaction of solar UV radiation with cells." Journal of Photochemistry and Photobiology B: Biology 9, no. 3-4 (June 1991): 381–82. http://dx.doi.org/10.1016/1011-1344(91)80180-p.

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Dissertations / Theses on the topic "Solar UV radiation"

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Bennet, Francesca Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Studying polymer degradation at a molecular level via soft ionisation mass spectrometry." Publisher:University of New South Wales, 2009. http://handle.unsw.edu.au/1959.4/43692.

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The present study employs a range of soft-ionisation mass spectrometry techniques to study the degradation of model compounds of poly(methyl methacrylate), poly(n-butyl acrylate) and poly(2-hydroxyethyl methacrylate) under conditions designed to simulate the worst-case scenario that would be experienced by a polymer used in a surface coating on a steel roof. Vinyl-terminated and saturated polymers were degraded for periods of up to 2 years under simulated solar radiation at a temperature of 95??C, temperature of 95 ??C in the dark, and simulated solar radiation at 35??C. Similar degradation mechanisms were observed under heat and UV radiation. The presence of UV radiation accelerated the degradation occurring at high temperature, and vice versa. The combination of heat and UV radiation is far more detrimental to the polymers than either of these conditions alone. Both vinyl-terminated and saturated pMMA degraded under UV radiation at 95??C, whereas under conditions of UV radiation alone or high temperature alone, the saturated polymer was found to be stable. The vinyl-terminated pMMA degrades in all cases via the formation of ethylene oXide-type end groups, which subsequently rearrange under the expulsion of formaldehyde and 2-oxo-propionic acid methyl ester. This is in contrast to all previous literature, in which pMMA degrades via depolymerisation and is stable at 95??C. Degradation of pBA included a degradation mechanism similar to that of pMMA in addition to other polymer fragments, some of which cannot be assigned. pBA (both saturated and vinyl-terminated) showed a tendency to crosslink under all degradation conditions in this study. Only saturated pHEMA was stable under thermal degradation. In all other cases, pHEMA showed some degradation, but displayed a much greater tendency to crosslink rapidly. Terminal vinyl bonds were shown in all cases to be a weak point in the polymer with respect to degradation. pMMA was found to be the least reactive of these polymers. pHEMA showed some small degradation but had a greater tendency to crosslink via the hydroxyethyl side groups. pBA does not have any such reactive groups, and its crosslinking reaction may be explained via the acrylate backbone, or the longer alkyl ester group.
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Lake, Nicholas Charles Hermon. "Effects of solar ultraviolet radiation on fish with particular respect to the culture of turbot and gilthead bream." Thesis, Heriot-Watt University, 1990. http://hdl.handle.net/10399/854.

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Acosta, Luis Roberto. "The attenuation of biologically active solar radiation (UV-B) in Mexico City environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21677.pdf.

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Corrêa, Fábio Henrique Pires [UNESP]. "Estimativa das radiações ultravioleta (UV), fotossintéticamente ativa (PAR) e infravermelha (IV) em função da razão de insolação." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/86481.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O trabalho descreve a análise da transmissividade atmosférica da média mensal das radiações Global K T), Ultravioleta K TUV F t i tetic me te Ati K TPAR e I f e me h K TIV) em função da razão de insolação N ). As equações de estimativas das frações KT, KTUV, KTPAR e KTIV em função de (n/N) foram apresentadas e discutidas para os agrupamentos dos dados anual, sazonal e mensal. A base de dados das radiações Global (G), Ultravioleta (UV), Fotossinteticamente Ativa (PAR), Infravermelha (IV) e o número de horas de brilho solar (n) foram medidas no período de 2001 a 2005 em Botucatu/SP/Brasil. Os resultados da análise mostram que existe uma correlação entre a transmissividade atmosférica KT, KTUV, KTPAR e KTIV, com a razão de insolação (n/N), em Botucatu. Os valores de KT, KTUV, KTPAR e KTIV e insolação (n/N) foram menores na estação chuvosa (alta concentração de nuvens e vapor d'ág e m i e t ec b ix c ce t de e e p d’ ág e t concentração de aerossóis). Os valores de KT variaram de 47,1% em janeiro a 60,4% em abril, com média de 55,0%; para KTUV 3,66% em janeiro a 4,13% em setembro, com média de 40,0%; KTPAR de 60,7% em janeiro a 76,3% em abril, com média de 69,0%; KTIV de 38,8% para 75,1% com média de 46,2%. O valor da razão de insolação variou de 38,8% em janeiro para 75,0% em agosto, com uma média de 58,0%. Os resultados obtidos com os modelos de estimativas de Angström mostram que as correlações de KT, KTUV, KTPAR e KTIV em função da razão de insolação (n/N) para agrupamentos total dos dados diários (anual) se ajustaram a dois tipos de equações de regressão: linear e parabólico com coeficientes de correlações R2 variando entre 0,750 a 0,880. Na validação do modelo linear...
The paper deals with the atmospheric transmission (solar fractions Ki) in monthly scale by hi e ti g b K T t i et K TUV), photosynthetically active K TPAR d i f ed K TIR) solar fractions. Estimated equations KT, KTUV, KTPAR and KTIR as a function of n/N were presented and discussed for the annual, seasonal and monthly solar radiation database. The sunshine values and the global (G), ultraviolet (UV), photosynthetically active (PAR) and infrared (IR) radiations database was measured in the period of 2001 to 2005 in Botucatu – SP – Brazil. The results of climate analysis show a correlation between the solar fractions KT, KTUV, KTPAR and KTIR with the relative sunshine duration (n/N) in Botucatu. The values of KT, KTUV, KTPAR and KTIR and relative sunshine duration (n/N) were lower in the rainy season (high concentration of clouds and water vapor) and higher in the dry season (low concentration of clouds and water vapor and high concentration of aerosols). The KT values ranged from 47,1% in January to 60,4% in April, with a mean of 55,0%; KUV from 3,66% in January to 4,13% in September, with a mean of 40,0%; KPAR from 60,7% in January to 76,3% in April, with a mean of 69,0%; KIR from 38,8% to 75,1%, with a mean of 46,2%. The relative sunshine duration values ranged from 38,8% in January to 75,0% in August, with a mean of 58,0%. The results of the annual estimated models show that the KT, KTUV, KTPAR and KTIR correlations due to relative sunshine duration fitted to the linear and parabolic correlation equations... (Complete abstract click electronic access below)
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Corrêa, Fábio Henrique Pires 1985. "Estimativa das radiações ultravioleta (UV), fotossintéticamente ativa (PAR) e infravermelha (IV) em função da razão de insolação /." Botucatu : [s.n.], 2011. http://hdl.handle.net/11449/86481.

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Orientador: João Francisco Escobedo
Banca: Dinival Martins
Banca: Alexandre Dal Pai
Resumo: O trabalho descreve a análise da transmissividade atmosférica da média mensal das radiações Global K T), Ultravioleta K TUV F t i tetic me te Ati K TPAR e I f e me h K TIV) em função da razão de insolação N ). As equações de estimativas das frações KT, KTUV, KTPAR e KTIV em função de (n/N) foram apresentadas e discutidas para os agrupamentos dos dados anual, sazonal e mensal. A base de dados das radiações Global (G), Ultravioleta (UV), Fotossinteticamente Ativa (PAR), Infravermelha (IV) e o número de horas de brilho solar (n) foram medidas no período de 2001 a 2005 em Botucatu/SP/Brasil. Os resultados da análise mostram que existe uma correlação entre a transmissividade atmosférica KT, KTUV, KTPAR e KTIV, com a razão de insolação (n/N), em Botucatu. Os valores de KT, KTUV, KTPAR e KTIV e insolação (n/N) foram menores na estação chuvosa (alta concentração de nuvens e vapor d'ág e m i e t ec b ix c ce t de e e p d' ág e t concentração de aerossóis). Os valores de KT variaram de 47,1% em janeiro a 60,4% em abril, com média de 55,0%; para KTUV 3,66% em janeiro a 4,13% em setembro, com média de 40,0%; KTPAR de 60,7% em janeiro a 76,3% em abril, com média de 69,0%; KTIV de 38,8% para 75,1% com média de 46,2%. O valor da razão de insolação variou de 38,8% em janeiro para 75,0% em agosto, com uma média de 58,0%. Os resultados obtidos com os modelos de estimativas de Angström mostram que as correlações de KT, KTUV, KTPAR e KTIV em função da razão de insolação (n/N) para agrupamentos total dos dados diários (anual) se ajustaram a dois tipos de equações de regressão: linear e parabólico com coeficientes de correlações R2 variando entre 0,750 a 0,880. Na validação do modelo linear... (Resumo completo, clicar aesso eletrônico abaixo)
Abstract: The paper deals with the atmospheric transmission (solar fractions Ki) in monthly scale by hi e ti g b K T t i et K TUV), photosynthetically active K TPAR d i f ed K TIR) solar fractions. Estimated equations KT, KTUV, KTPAR and KTIR as a function of n/N were presented and discussed for the annual, seasonal and monthly solar radiation database. The sunshine values and the global (G), ultraviolet (UV), photosynthetically active (PAR) and infrared (IR) radiations database was measured in the period of 2001 to 2005 in Botucatu - SP - Brazil. The results of climate analysis show a correlation between the solar fractions KT, KTUV, KTPAR and KTIR with the relative sunshine duration (n/N) in Botucatu. The values of KT, KTUV, KTPAR and KTIR and relative sunshine duration (n/N) were lower in the rainy season (high concentration of clouds and water vapor) and higher in the dry season (low concentration of clouds and water vapor and high concentration of aerosols). The KT values ranged from 47,1% in January to 60,4% in April, with a mean of 55,0%; KUV from 3,66% in January to 4,13% in September, with a mean of 40,0%; KPAR from 60,7% in January to 76,3% in April, with a mean of 69,0%; KIR from 38,8% to 75,1%, with a mean of 46,2%. The relative sunshine duration values ranged from 38,8% in January to 75,0% in August, with a mean of 58,0%. The results of the annual estimated models show that the KT, KTUV, KTPAR and KTIR correlations due to relative sunshine duration fitted to the linear and parabolic correlation equations... (Complete abstract click electronic access below)
Mestre
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Berry, Nicole Lynn. "DOES DISSOLVED ORGANIC MATTER PROTECT MOSQUITO LARVAE FROM DAMAGE BY SOLAR ULTRAVIOLET RADIATION?" Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1547210872871561.

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Gulston, Melanie Katharine. "The effects of the sunscreen chemicals Padimate-O and 2-ethylhexyl-P-methoxycinnamate on DNA." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301520.

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Turnbull, David J. "Development of an improved shade environment for the reduction of personal UV exposure." University of Southern Queensland, Faculty of Sciences, 2005. http://eprints.usq.edu.au/archive/00001519/.

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The research from this project has quantified the solar UV environment beneath and surrounding typical local council public shade structures. The effects of changing seasons, atmospheric conditions, structural modifications and surrounding plant life on diffuse UV have been quantified. Strategies to improve current shade structures, so as to significantly reduce the levels of diffuse UV reaching the human body in the shade, have also been developed. For the shade structures used in this research it was found that ultraviolet protection factors ranged from 1.5 to 18.3 for a decreasing solar zenith angle. Correlations have been found relating diffuse erythemal UV to UV in the shade for clear skies and a changing solar zenith angle. The effect of changing atmospheric ozone levels on diffuse erythemal UV levels has been quantified. UV exposures were assessed for a decrease in scattered UV beneath specific shade structures by the use of two types of protection, namely, side-on polycarbonate sheeting and evergreen vegetation. Broadband radiometric and dosimetric measurements conducted in the shade of a scale model shade structure, during summer and winter, showed significant decreases in exposure of up to 65% for summer and 57% for winter when comparing the use and non-use of polycarbonate sheeting. Measurements conducted in the shade of four shade structures, with various amounts of vegetation blocking different sides, showed that adequate amounts and positioning of vegetation decreased the scattered UV in the shade by up to 89% when compared to the shade structure that had no surrounding vegetation. This research shows that major UV reduction could be achieved by the ‘shade creation and design industry’, and that shade guidelines should be updated as soon as possible.
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Dal, Pai Enzo [UNESP]. "Radiciações e frações solares UV, PAR, IV em estufa de polietileno: evolução anual média mensal diária e equações de estimativa." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/90452.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O trabalho descreve o estudo das radiações global(G), ultravioleta (UV), fotossinteticamente ativa (PAR), infravermelha (IV) e da insolação, em uma estufa de polietileno, medidas no período de março de 2008 a fevereiro de 2009 em Botucatu, São Paulo, Brasil. Foram analisados no presente estudo: 1- a evolução anual das radiações e frações solares UV/G, PAR/G e IV/G média mensal; 2- as equações de estimativa para as radiações UV, PAR e IV dentro da estufa em função das radiações global interna e global externa ; 3- evolução anual da insolação média mensal e a equação de estimativa Ångström para as radiações G, UV, PAR e IV dentro da estufa, em função da razão de insolação interna e externa. A evolução anual das radiações G, UV, PAR e IV médias mensais diárias dentro e fora da estufa, mostrou que alem do dia e local, dependem do clima, cobertura do céu, presença de vapor entre outros. As radiações foram maiores no verão-primavera e menores no outono-inverno. Os valores médios total dentro e fora da estufa foram: GIN = 13,1MJ/m2, UVIN= 0,34MJ/m2, PARIN = 6,70 MJ/m2 e IVIN = 6,15MJ/m2, GEX= 17,14MJ/m2, UVEX= 0,72MJ/m2, PAREX = 8.38 MJ/m2 e IVEX= 8.04MJ/m2. Os valores médios total, das frações em percentagem, dentro e fora da estufa foram: UVIN / GIN =2,6% ; PARIN/GIN = 50.6%, IVIN/GIN= 47,1%, UVEX / GEX = 4,18%, PAREX/GEX= 48,9% e IVEX/GEX= 46,9% respectivamente. As equações de estimativa, anual e sazonal, obtidas para as irradiações Huv, Hpar e Hiv em função da radiação HIN e HEX são lineares, tipo Y = aX, onde coeficiente angular quantifica percentualmente a fração espectral: anual HUVIN /HGIN = 2,6%; HPARIN/HGIN = 50,8% e HIVIN/HGIN = 46,7%, enquanto que a sazonal: Primavera HUVIN /HGIN = 2,5%; HPARIN/HGIN = 51,7% e HIVIN/HGIN = 45,7%; Verão: HUVIN /HGIN = 2,7%; HPARIN/HGIN = 51,8% e HIVIN/HGIN = 45,4%,...
This study describes the study of the global radiation(G), ultraviolet (UV), photosynthetically active radiation (PAR), infrared radiation (IV) and insolation, inside a greenhouse of polyethylene, measures in the period of March 2008 to February of 2009 in Botucatu, São Paulo, Brazil. They had been analyzed in the present study: 1 – annual, monthly and average evolution of the radiations UV/G, PAR/G and IV/G; 2 - equations of estimate for radiations UV, PAR and IV inside of the greenhouse in function of the radiations global internal and global external; 3 - annual evolution of the monthly average insolation and Ångström equation of estimate for radiations G, UV, PAR and IV inside of the greenhouse, in function of the reason of internal and external insolation. The annual evolution of radiations G, UV, PAR and IV daily monthly averages inside and outside of the greenhouse, showed that beyond the day and place, they depend on the climate, the radiations had been bigger in the summer-spring and minors in the autumn-winter. The average values total inside and outside of the greenhouse had been: GIN = 13,1MJ/m2, UVIN= 0,34MJ/m2, PARIN =6,70 MJ/m2 and IVIN = 6,15MJ/m2, GEX= 17,14MJ/m2, UVEX= 0,72MJ/m2, PAREX = 8,38 MJ/m2 and IVEX= 8.04MJ/m2. The average values total, of the fractions in percentage, inside and outside of the greenhouse had been: UVIN/GIN =2,6%; PARIN/GIN = 50,6%, IVIN/GIN= 47,1%, UVEX/GEX = 4,18%, PAREX/GEX= 48,9% and IVEX/GEX= 46,9% respectively. The equations of estimate, annual and sazonal, gotten for the irradiations Huv, Hpar and Hiv in function of radiation HIN and HEX are linear, type Y = aX, where angular coefficient it quantifies the spectral fraction percentile: annual HUVIN /HGIN = 2,6%; HPARIN/HGIN = 50,8% and HIVIN/HGIN = 46,7%, whereas the sazonal: Spring HUVIN /HGIN = 2,5%; HPARIN/HGIN = 51,7% and HIVIN/HGIN = 45,7%; Summer: HUVIN /HGIN = 2,7%; ...(Complete abstract click electronic access below)
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D\'Avila, Alexandre Coelho da Silva. "Degradação do pesticida amicarbazona em meio aquoso pelo processo TiO2/UV irradiado por luz solar." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-03072013-105850/.

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Os processos oxidativos avançados (POAs) têm sido apontados como alternativa eficiente para a degradação de poluentes recalcitrantes. Entre os POAs, a fotocatálise utilizando luz solar vem sendo muito estudada tendo em vista sua aplicação no tratamento de efluentes aquosos contendo pesticidas. No presente trabalho, estudou-se a degradação do herbicida amicarbazona (AMZ) por meio do processo TiO2/UV em um reator com coletores parabólicos compostos irradiados por luz solar. Os experimentos foram realizados segundo uma matriz Doehlert para o estudo da influência da concentração inicial de AMZ (20-100 mg L-1), da concentração de catalisador (0,1-1 g L-1) e do número de tubos expostos à luz solar (1-9). Amostras retiradas ao longo do tempo foram analisadas quanto às concentrações de AMZ e de carbono orgânico total (TOC). As medidas radiométricas realizadas indicaram que a radiação UVB-UVA correspondeu em média a ca. 4% da radiação solar total incidente entre 310-2800 nm; a actinometria de ferrioxalato indicou fluxo fotônico médio de 3,58×10-5 mol fótons m-2 s-1 para dias ensolarados típicos. O processo TiO2/UV mostrou-se eficiente para degradação do pesticida, que foi totalmente removido antes de 45 minutos de tratamento, para as seguintes condições: [AMZ]0=21,3 mg L-1; [TiO2]=0,5 g L-1; e 7 tubos. Contudo, nesse caso houve apenas ca. 24% de mineralização e na grande maioria dos casos os valores de TOC permaneceram praticamente constantes, o que indica a formação de sub-produtos recalcitrantes, cuja toxicidade e biodegradabilidade devem ser caracterizadas. A análise estatística dos resultados confirma os efeitos importantes da concentração inicial do pesticida e do número de tubos expostos (volume irradiado), cujo aumento permite compensar a menor incidência de radiação solar. Em alguns experimentos os resultados sugeriram que a degradação da AMZ foi favorecida pela maior concentração de TiO2. Na grande maioria dos casos os valores de ACM foram inferiores a 50 m2 kg-1, o que torna este parâmetro interessante para aumento de escala de processos fotocatalíticos irradiados por luz solar empregados no tratamento de efluentes aquosos contendo amicarbazona.
Advanced oxidative processes (AOP) have been considered as an efficient alternative for the degradation of recalcitrant pollutants. Photocatalysis using solar radiation has been studied for the treatment of wastewaters containing pesticides. In this work, the degradation of the herbicide amicarbazone (AMZ) by the TiO2/UV process was studied in a reactor equipped with compound parabolic collectors irradiated by solar light. The experiments were carried out according to a Doehlert matrix to study the effects AMZ initial concentration (20-100 mg L-1), catalyst concentration (0.1-1 g L-1), and number of tubes exposed to solar light (1-9). Samples were analyzed for AMZ and total organic carbon (TOC) concentrations. Radiometric measurements indicated that UVB-UVA radiation corresponded in average to about 4% of the solar radiation between 310-2800 nm; ferrioxalate actinometry resulted in an average photonic flux of 3.58×10-5 mol fótons m-2 s-1 for typical sunny days. The TiO2/UV process showed to be efficient for the degradation of the pesticide, which was completely removed before 45 minutes of treatment, for the following conditions: [AMZ]0=21.3 mg L-1; [TiO2]=0.5 g L-1; and 7 tubes. However, in this case only ca. 24% of mineralization was achieved, and in most cases TOC values remained practically constant, indicating the formation of recalcitrant by-products whose toxicity and biodegradility should be characterized. Statistical analysis of the results confirmed important effects of pesticide initial concentration and number of tubes exposed (irradiated volume), whose increase enables to compensate the lower incidence of solar radiation. Some experimental results suggested that AMZ degradation was favored by higher TiO2 concentrations. In most cases the values of ACM were lower than 50 m2 kg-1, in such a way that this parameter is interesting for scale-up of solar irradiated photocalytic processes used in the treatment of amicarbazone-containing wastewaters.
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Books on the topic "Solar UV radiation"

1

Solar-UV actions on living cells. New York: Praeger, 1985.

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Jagger, John. Solar-UV actions on living cells. New York: Praeger, 1985.

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Jeff, Sabburg, and Kimlin Michael G, eds. Scattered and filtered solar UV measurements. Dordrecht: Kluwer Academic Publishers, 2004.

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UV-B Monitoring Workshop (1992 Washington, D.C.). UV-B Monitoring Workshop: A review of the science and status of measuring and monitoring programs. Washington, D.C.?: The Service?, 1992.

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Chatterjee, K. Ozone and solar UV-B over India: A research effort towards IPCC and Montreal protocol processes. New Delhi: Environmental Systems Branch, Development Alternatives, 1992.

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Oakes, Arnold G. Nimbus-7 data product summary. Greenbelt, Md: Goddard Space Flight Center, 1989.

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Health, solar UV radiation and environmental change. Lyon: International Agency for Research on Cancer, 1993.

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Parisi, Alfio V., Jeff Sabburg, and Michael G. Kimlin. Scattered and Filtered Solar Uv Measurements. Parisi Alfio V Sabburg Jeff Kimlin Michael G, 2011.

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Scattered and Filtered Solar UV Measurements. Springer, 2012.

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Kricker, A., M. E. Jones, and B. K. Armstrong. Health, Solar UV Radiation & Environmental Change (IARC Technical Report). World Health Organization, 1993.

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Book chapters on the topic "Solar UV radiation"

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Webb, Ann R., and Elizabeth C. Weatherhead. "Current Status of UV Measurements." In Solar Ultraviolet Radiation, 267–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_20.

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Blumthaler, M. "Broad-Band Detectors for UV-Measurements." In Solar Ultraviolet Radiation, 175–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_13.

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Kerr, J. B., C. T. McElroy, and D. I. Wardle. "Ozone and UV Public Awareness Programs." In Solar Ultraviolet Radiation, 251–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_18.

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Isaksen, Ivar S. A. "Stratospheric Ozone Depletion and UV-B Changes." In Solar Ultraviolet Radiation, 13–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_2.

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Seckmeyer, G., A. Albold, and B. Mayer. "Methods to Derive Geographical Differences of UV Irradiances." In Solar Ultraviolet Radiation, 155–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_11.

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Manetas, Yiannis. "Effects of UV-B Radiation on Terrestrial Plants." In Solar Ultraviolet Radiation, 201–8. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_15.

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Kerr, James B. "Observed Dependencies of Atmospheric UV Radiation and Trends." In Solar Ultraviolet Radiation, 259–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03375-3_19.

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Horneck, Gerda. "Solar UV Radiation (Biological Effects)." In Encyclopedia of Astrobiology, 1535–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_1465.

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Horneck, Gerda. "Solar UV Radiation, Biological Effects." In Encyclopedia of Astrobiology, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1465-3.

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Horneck, Gerda. "Solar UV Radiation, Biological Effects." In Encyclopedia of Astrobiology, 2290–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1465.

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Conference papers on the topic "Solar UV radiation"

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Pulli, Tomi, Petri Kärhä, Joop Mes, Josef Schreder, Priit Jaanson, and Farshid Manoocheri. "Improved diffusers for solar UV spectroradiometers." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2012): Proceedings of the International Radiation Symposium (IRC/IAMAS). AIP, 2013. http://dx.doi.org/10.1063/1.4804894.

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Chen, Yi-Chun, Gelsor Norsang, Nima Pingcuo, Arne Dahlback, Oyvind Frette, Berit Kjeldstad, Bo̸rge Hamre, Knut Stamnes, and Jakob J. Stamnes. "Solar UV radiation measurements across the Tibetan Plateau." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2012): Proceedings of the International Radiation Symposium (IRC/IAMAS). AIP, 2013. http://dx.doi.org/10.1063/1.4804903.

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Zerlaut, Gene A., and Yukiharu Miyake. "Relationships between daily UV-A, UV-B, and hemispherical solar radiation." In International Symposium on Optical Science and Technology, edited by James R. Slusser, Jay R. Herman, and Wei Gao. SPIE, 2002. http://dx.doi.org/10.1117/12.452911.

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Porrovecchio, G., M. Smid, J. Gröbner, M. Rajteri, C. Portesi, K. M. Nield, and L. Egli. "New detection systems for UV solar reference scanning spectroradiometers." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2012): Proceedings of the International Radiation Symposium (IRC/IAMAS). AIP, 2013. http://dx.doi.org/10.1063/1.4804900.

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Liley, Ben, Richard McKenzie, Paul Johnston, and Michael Kotkamp. "25 years of solar spectral UV measurements at 45° S." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2016): Proceedings of the International Radiation Symposium (IRC/IAMAS). Author(s), 2017. http://dx.doi.org/10.1063/1.4975569.

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Wen, Guoyong, Robert F. Cahalan, David Rind, Jeffery Jonas, Peter Pilewskie, and Jerald Harder. "Spectral solar UV radiation and its variability and climate responses." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2012): Proceedings of the International Radiation Symposium (IRC/IAMAS). AIP, 2013. http://dx.doi.org/10.1063/1.4804888.

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Blumthaler, Mario, Julian Gröbner, Luca Egli, and Saulius Nevas. "A guide to measuring solar UV spectra using array spectroradiometers." In RADIATION PROCESSES IN THE ATMOSPHERE AND OCEAN (IRS2012): Proceedings of the International Radiation Symposium (IRC/IAMAS). AIP, 2013. http://dx.doi.org/10.1063/1.4804892.

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Rohner, Nicola, and Andreas Neumann. "Measurement of High Thermodynamic Temperatures in the DLR Solar Furnace by UV-B Detection." In ASME Solar 2002: International Solar Energy Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/sed2002-1067.

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The correct selection of the operating wavelength is essential for a precise pyrometric temperature measurement on solar irradiated samples, as the measurement may be disturbed by reflected solar radiation. Atmospheric conditions and particularly the emissivity as basic material property determine the amount of this reflected and the emitted radiation from a sample under investigation. An approach to solve this problem by using a monochromator system for temperature measurement in the UV-B range was developed and experimentally tested. With this system, temperature measurements were possible beginning at 1320°C and ranging up to about 2400°C. Two calculation methods are described and compared. The influence of the calibration temperature on the quality of the temperature measurement is shown. Measurements on a blackbody up to 1500°C were performed for calibration purpose. Temperature measurements on a real solar heated magnesia sample up to 2400°C are presented and discussed. These spectral measurements on hot bodies irradiated in the DLR Solar Furnace led to the final specification of the measurement wavelengths to be in the range from 280 nm to 293 nm.
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Xia, Jiangtao, Xiaoli Mao, and Jing Zhao. "Design of autotrack detecting instrument for solar UV radiation." In International Conference on Optical Instrumentation and Technology, edited by Yongtian Wang, Yunlong Sheng, and Kimio Tatsuno. SPIE, 2009. http://dx.doi.org/10.1117/12.837783.

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Reinen, Henk A., E. Schlamann, J. F. van Sonderen, and Harry Slaper. "New solar UV radiation monitoring station in the Netherlands." In High Latitude Optics, edited by Knut H. Stamnes. SPIE, 1993. http://dx.doi.org/10.1117/12.163531.

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Reports on the topic "Solar UV radiation"

1

Dickens, Brian, and Eric Byrd. Programs to Estimate UV Dosage and Damage. National Institute of Standards and Technology, September 1999. http://dx.doi.org/10.6028/nist.ir.7500.

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The system of programs described in this paper is concerned with estimating the damage ensuing from exposure of specimens in dry and humid atmospheres to UV and visible radiation covering the solar range. Damage is monitored quantitatively by changes in IR spectra. The dose is estimated from UV spectra of the lamps and the interference filters (used to isolate a particular wavelength range). The dosage is estimated from the dose and the UV absorption of the specimens themselves. These programs allow rapid estimation of dosage and damage from regions of data, and manipulation and processing of the massive amounts of data required to carry out such comprehensive tests in a complete yet user-friendly manner.
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