Uv-B radiation
The sensitivity of sunflower (Helianthus annuus L.) plants to UV-B radiation is altered by nitrogen status
... study, UV-B radiation showed a negative effect on photosynthesis while nitrogen had a positive effect (Table 1), with no visible bleaching or necrosis on the leaves under UV-B ...by ...
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Effects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen
... of UV-B radiation on biocontrol fungi were observed for Metarhizium anisopliae, Lecanicil- lium lecanii and Clonostachys rosea (Braga et ...This radiation is bio- logically active against ...
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UV-B radiation as an elicitor of secondary metabolite production in plants of the genus Alternanthera
... their UV-absorbing capacity, may have increased their concentrations, acting as potent antioxidants that quickly neutralize ...of UV-B and flavonoids in apple fruits (Hagen et ...by ...
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How does UV-B radiation affect the initial growth of common bean (Phaseolus vulgaris L.)? Physiological and structural aspects / Como a radiação UV-B afeta o crescimento inicial do feijoeiro-comum (Phaseolus vulgaris L.)? Aspectos fisiológicos e estruturais
... Increased UV-B radiation, a topic of concern due to climate change, can affect plant development through structural and physiological ...to UV-B radiation for a period of 14 ...
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Nonlinear (MARS) modeling of long-term variations of surface UV-B radiation as revealed from the analysis of Belsk, Poland data for the period 1976–2000
... of UV-B monthly means from the long-term (1976–2000) monthly means (normalized by the long-term means), ...surface UV-B irradiance are rather short, usually not longer than 1 ...surface ...
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Study of the effect of different type of aerosols on UV-B radiation from measurements during EARLINET
... the comparison of the model results with the measured spectra the effective single scattering albedo was determined using an iterative procedure, which has been veri- fied against results from the 1998 Lindenberg Aerosol ...
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Photodegradation Mechanisms on Poly(ε-caprolactone) (PCL)
... Figure 6 shows SEM images for PCL specimens upon UV-B radiation. Unexposed PCL presents ductile fracture with evidences of plastic deformation. After exposure the fracture surface changes and a ...
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Enhanced Biosynthesis of Quercetin Occurs as A Photoprotective Measure in Lycopersicon esculentum Mill. under Acute UV-B Exposure
... to UV-B (60 min), which could be due to several reasons such as excessive photodegradation and depletion of chlorophyll (Strid and Porra 1992), disintegration of chloroplasts (Tevini et ...and b are ...
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Sensitividade do maracujazeiro‑amarelo à radiação ultravioleta‑B
... of UV-B radiation: low-UV-B (control) and high (UV-B treatment) with 20 plants in each ...high UV-B treatment, the lamps over the bench were wrapped with a ...
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The response of human skin commensal bacteria as a reflection of UV radiation: UV-B decreases porphyrin production.
... global radiation fears reflect the urgent need for a new modality that can simply determine if people are in a radiation risk of developing cancer and other ...(UV) radiation has been thought ...
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Inês CechinI Terezinha de Fátima Fumis
... UV-B radiation did not affect shoot biomass of sunflower plants grown in the greenhouse, regardless sampling time (data not ...no UV-B effects on growth under field and growth chamber ...
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GROUND-BASED OBSERVATION OF SOLAR UV RADIATION IN JAPAN, BRAZIL AND CHILE
... (UV) radiation is generally categorized into three wavelength regions: 1) UV-A: 315-400 nm, 2) UV-B: 280-315 nm, and 3) UV-C: 190-280 ...solar UV radiation and ...
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Regulation of the expression of NADP-malic enzyme by UV-B, red and far-red light in maize seedlings
... both UV-B and white light radiation, in particular red light, induce the expression of the photosyn- thetically active isoform of NADP-ME in both etiolated and green tissue of ...of ...
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J. Braz. Chem. Soc. vol.21 número12
... oxygen 1s edges and aluminum 2s and 2p edges were employed at the Brazilian Synchrotron Light Source (LNLS). The unoccupied molecular orbitals (LUMOs) of Alq 3 were probed using near-edge X-ray absorption ine structure ...
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Modelling of Non-Linear Pilot Disinfection Water System: A Bond Graph Approach
... The UV water disinfection system fed by a photovoltaic generator, object of our study, it consists of two tanks. A DC motor- pump ensures the circulation of water between the two tanks through UV engine. ...
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Antarctic network of lamp-calibrated multichannel radiometers for continuous ozone and uv radiation data
... erythemally-weighted UV, UVB and UVA radiation, photosynthetically active radiation (PAR), total ozone (O 3 ) and a cloud parameter ...For UV data, dose rates as well as daily doses are ...
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Validity of satellite measurements used for the monitoring of UV radiation risk on health
... ozone recovery at rates that are larger in the first half of the 21st century and smaller towards its end. Between 2000 and 2100 the decrease over midlatitudes ranges be- tween 5 and 15 %, while at the southern high ...
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Radiation balance of coffee hedgerows
... net radiation measurements in 2002, daily sap flow of the four encompassed plants was determined by the stem heat balance method (Sakuratani, 1981; Baker & Van Bavel, 1987), as described by Marin ...net ...
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Biometrical and morphological analyses of Macrobrachium olfersii (Wiegmann, 1836) (Crustacea, Decapoda, Palaemonidae) embryos exposed to UVA and UVB radiation
... Apoptosis also serves to maintain the integrity of tissues of organisms when they are exposed to extrinsic stimuli that promote cell damage (Zhou and Steller, 2003). Caspase-3 is a protein involved in the cascade that ...
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Developmental Effects of Additional Ultraviolet a Radiation, Growth Regulators and Tyrosine in Alternanthera brasiliana (L.) Kuntze Cultured in vitro
... Groups of 25 nodal segments, with two axillary buds without leaves or petioles, from Murashige and Skoog basic medium (MS) cultured plantlets, were introduced in six different culture media: (1) MS; (2) MS + 2 µ M 2,4 ...
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