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Ultraviolet radiation

Voltammetric determination of metals in waters and biological fluids using sample mineralization with ultraviolet radiation.

Voltammetric determination of metals in waters and biological fluids using sample mineralization with ultraviolet radiation.

... VOLTAMMETRIC DETERMINATION OF METALS IN WATERS AND BIOLOGICAL FLUIDS USING SAMPLE MINERALIZATION WITH ULTRAVIOLET RADIATION. This work describes the optimization of pretreatment steps for the destruction of ...

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Application of ultraviolet radiation as a contribution to green chemistry and construction of an alternative and low-cost photochemical reactor for pre-treatment of samples.

Application of ultraviolet radiation as a contribution to green chemistry and construction of an alternative and low-cost photochemical reactor for pre-treatment of samples.

... OF ULTRAVIOLET RADIATION AS A CONTRIBUTION TO GREEN CHEMISTRY AND CONSTRUCTION OF AN ALTERNATIVE AND LOW-COST PHOTOCHEMICAL REACTOR FOR PRE-TREATMENT OF ...SAMPLES. Ultraviolet radiation ...

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High levels of ultraviolet radiation observed by ground-based instruments below the 2011 Arctic ozone hole

High levels of ultraviolet radiation observed by ground-based instruments below the 2011 Arctic ozone hole

... S.: Radiation amplification factors – improved formulation accounts for large increases in ultraviolet radiation associated with Antarctic ozone depletion, in: Ul- traviolet Radiation in ...

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Liquid production of entomopathogenic fungi and ultraviolet radiation and temperature effects on produced propagules

Liquid production of entomopathogenic fungi and ultraviolet radiation and temperature effects on produced propagules

... the ultraviolet action and to the tem- ...of ultraviolet radiation, plates with blastos- pores were exposed to it for 25 and 50 ...to ultraviolet radiation, the smaller the number of ...

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Distinct pigmentary and melanocortin 1 receptor-dependent components of cutaneous defense against ultraviolet radiation.

Distinct pigmentary and melanocortin 1 receptor-dependent components of cutaneous defense against ultraviolet radiation.

... gene expression in the basal epidermis were compared to each other and to nonmutant animals. Our analysis revealed discrete Kit- and Mc1r-dependent UVB transcriptional responses in the basal epidermis. The Kit-dependent ...

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Direct and indirect effects of vertical mixing, nutrients and ultraviolet radiation on the bacterioplankton metabolism in high-mountain lakes from southern Europe

Direct and indirect effects of vertical mixing, nutrients and ultraviolet radiation on the bacterioplankton metabolism in high-mountain lakes from southern Europe

... Thirdly, our findings reveal a non-generalized direct positive effect of P-pulse on the bacterial metabolism. Particularly for the opaque lake P-addition decreased HBP re- gardless the radiation quality or mixing ...

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DEFINITION DESIRED MODE ULTRAVIOLET RADIATION, WHICH PREVENT MYCOBACTERIUM TUBERCULOSIS SURVIVAL AND CONVERSION TO L-FORMS

DEFINITION DESIRED MODE ULTRAVIOLET RADIATION, WHICH PREVENT MYCOBACTERIUM TUBERCULOSIS SURVIVAL AND CONVERSION TO L-FORMS

... SURVIVAL AND CONVERSION TO L-FORMS Moiseenko T. N. Wolyanski A. Y., Kovaleva A. A Bactericidal effect of ultraviolet (UV) rays was first described over 100 years ago. UV was used in hospitals from 1930 and in 1936 ...

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Produção de discos de silicato de cálcio para dosimetria da radiação ultravioleta / Manufacturing pellets of calcium silicate for ultraviolet radiation dosimetry

Produção de discos de silicato de cálcio para dosimetria da radiação ultravioleta / Manufacturing pellets of calcium silicate for ultraviolet radiation dosimetry

... Para utilizar um material TL como dosímetro ele deve apresentar características básicas tais como, curva de emissão TL simples, de preferência com um pico entre 180 ºC e 400 ºC; ser p[r] ...

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Ultraviolet radiation protection: current available resources in photoprotection

Ultraviolet radiation protection: current available resources in photoprotection

... Antioxidants are defined as substances which, when present in low concentrations as compared with those of an oxidizable substrate, significantly reduce or prevent the oxidation of this substrate. They may act by ...

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Daily and annual variations of erythemal ultraviolet radiation in Southwestern Spain

Daily and annual variations of erythemal ultraviolet radiation in Southwestern Spain

... solar ultraviolet (UV) radiation has received considerable attention during recent years, mainly because of its substantial increase at the Earth’s surface due to ozone ...UV radiation represents a ...

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Stratospheric ozone fluctuation and ultraviolet radiation over Serbia

Stratospheric ozone fluctuation and ultraviolet radiation over Serbia

... The to tal in for ma tion on sites of the Earth’s at mo sphere scanned from OMI and the to tal num ber of data in each daily re port from this sat el lite is ob tained as a mul ti pli[r] ...

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Polímeros  vol.19 número4

Polímeros vol.19 número4

... to ultraviolet radiation, results in the formation of new groups in the polymer chain, carbonyl and vinyl groups for example, mainly in the amorphous region of material, and this may be ones of the causes ...

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Low-level red laser therapy alters effects of ultraviolet C radiation on Escherichia coli cells

Low-level red laser therapy alters effects of ultraviolet C radiation on Escherichia coli cells

... To evaluate induction of filamentation, exponential and stationary E. coli AB1157 and AB1886 cultures were obtained and exposed to a low-level red laser and UVC as described above. Bacterial suspensions that were not ...

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J. Braz. Chem. Soc.  vol.23 número9

J. Braz. Chem. Soc. vol.23 número9

... with ultraviolet light (UV/H 2 O 2 ), Fenton’s reagent (H 2 O 2 /Fe(II)) and photo-Fenton (H 2 O 2 /Fe(II)/UV) processes in the treatment of stripped sour water from the Petrobras Replan Oil Refinery in Paulínia ...

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Evaluating the clinical and physiological effects of long term ultraviolet B radiation on guinea pigs (Cavia porcellus).

Evaluating the clinical and physiological effects of long term ultraviolet B radiation on guinea pigs (Cavia porcellus).

... 227.85¡14.09 mm [32]. Since no ocular pathology was identified in any of the eyes, it is possible that the increase in corneal thickness may be a protective mechanism to limit the potential for damage to internal ...

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Noise and Fano-Factor Control in AC-Driven Aharonov-Casher Ring

Noise and Fano-Factor Control in AC-Driven Aharonov-Casher Ring

... infrared, ultraviolet radiation and magnetic ...infrared radiation, a random oscillatory behavior of the Fano factor is ...of ultraviolet radiation, the Fano factor becomes ...

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Vitamina C.

Vitamina C.

... sis in vitro and in vivo. Darr D, Combs S, Dunston S, Manning T, and Pinnell S. Topical vitamin C protects porcine skin from ultraviolet radiation- induced damage. Nakamura T, Pinnell S[r] ...

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Effectiveness of Nivea Sunscreen under Ultraviolet Light

Effectiveness of Nivea Sunscreen under Ultraviolet Light

... Sunscreen has commonly been used to prevent ultraviolet radiation from damaging our skin. A variety of ingredients which absorb ultraviolet light, such as titanium dioxide or zinc oxide, are used. On ...

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J. Braz. Chem. Soc.  vol.28 número4

J. Braz. Chem. Soc. vol.28 número4

... of ultraviolet radiation on biodiesels obtained from soy, canola, linseed and microalgae oils initiate oxidative processes which lead to the decrease in the induction period (IP) of the ...

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Radiation balance of coffee hedgerows

Radiation balance of coffee hedgerows

... The radiation balance of hedgerows is an important variable in studies of mass and energy exchanges between parcial ground cover crops and the ...net radiation in this length (Rnc) was found by integration ...

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