An electronic personal UV-B-dosimeter

Naggar, Saad El Dine El; Gustat, H.; Magister, H.; Rochlitzer, R.

doi:10.1016/1011-1344(95)07216-2

Cited by 22 publications

(16 citation statements)

References 1 publication

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“…Ambient UVA + UVB radiation was continuously recorded at the nearby (1.5 km) Dallmann Laboratory with a 32‐channel single‐photon counting spectroradiometer (Isitec, Bremerhaven, Germany). In addition, the weighted irradiance (minimal erythemal dose, UV ery ) was measured continuously next to the cages with two ELUV‐14 UV‐dosimeters (ESYS, Berlin, Germany; El Naggar et al , 1995) to follow the underwater UV‐regime and its relative changes during the experiment.…”

Section: Methodsmentioning

confidence: 99%

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Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Zacher

Wulff

Molis

et al. 2007

Global Change Biology

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Ultraviolet radiation (UVR) research on marine macroalgae has hithero focussed on physiological effects at the organism level, while little is known on the impact of UV radiation on macroalgal assemblages and even less on interactive effects with other community drivers, e.g. consumers. Field experiments on macrobenthos are scarce, particularly in the Antarctic region. Therefore, the effects of UVR and consumers (mainly limpets were excluded) on early successional stages of a hard bottom macroalgal community on King George Island, Antarctica, were studied. In a two-factorial design experimental units [(1) ambient radiation, 280-700 nm; (2) ambient minus UVB, 320-700 nm and (3) ambient minus UVR, 400-700 nm vs. consumer-no consumer] were installed between November 2004 and March 2005 (n 5 4 plus controls). Dry mass, species richness, diversity and composition of macroalgal assemblages developing on ceramic tiles were followed. Consumers significantly suppressed green algal recruits and total algal biomass but increased macroalgal richness and diversity. Both UVA and UVB radiation negatively affected macroalgal succession. UVR decreased the density of Monostroma hariotii germlings in the first 10 weeks of the experiment, whereas the density of red algal recruits was significantly depressed by UVR at the end of the study. After 106 days macroalgal diversity was significantly higher in UV depleted than in UVexposed assemblages. Furthermore, species richness was significantly lower in the UV treatments and species composition differed significantly between the UV-depleted and the UV-exposed treatment. Marine macroalgae are very important primary producers in coastal ecosystems, serving as food for herbivores and as habitat for many organisms. Both, UVR and consumers significantly shape macroalgal succession in the Antarctic intertidal. Consumers, particularly limpets can mediate negative effects of ambient UVR on richness and diversity till a certain level. UVB radiation in general and an increase of this short wavelength due to stratospheric ozone depletion in particular may have the potential to affect the zonation, composition and diversity of Antarctic intertidal seaweeds altering trophic interactions in this system.

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Section: Methodsmentioning

confidence: 99%

“…ELUV-14 UV-dosimeters (ESYS, Berlin, Germany;El Naggar et al, 1995) to follow the underwater UV-regime and its relative changes during the experiment.…”

Section: Radiation Measurementsmentioning

confidence: 99%

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Zacher

Wulff

Molis

et al. 2007

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…Ambient UV-A + UV-B, radiation was continuously recorded at the nearby (1.5 km), Dallmann Laboratory with a 32-channel single-quantum counting spectroradiometer (Isitec, Germany). In addition, the weighted irradiance (minimal erythemal dose, UV ery ), was measured continuously next to the cages with two ELUV-14 UV-dosimeters (El Naggar et al 1995), to follow the relative changes of the underwater UV-B regime during the experiment.…”

Section: Radiation Measurementsmentioning

confidence: 99%

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

Zacher

Hanelt²,

Wiencke

et al. 2007

Polar Biol

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A 15 week field experiment (austral summer Nov-Mar) was carried out in an intertidal hard bottom platform in Antarctica (King George Island). To test whether grazing and ultraviolet radiation (UVR) influenced the succession of a benthic microalgal assemblage, a twofactorial design was used (1) ambient radiation, >280 nm; (2) ambient minus UV-B, >320 nm; (3) ambient minus UVR, >400 nm versus grazer-no grazer). On four sampling occasions microalgae were identified, counted and carbon contents were calculated. The assemblage was dominated by the diatom genera Navicula and Cocconeis. Biomass was generally low in all treatments but was significantly reduced by grazing throughout the experiment. No significant UV effects were found. Grazer absence particularly favoured diatoms of the genus Cocconeis. We conclude that the Antarctic microalgal assemblage was unaffected by present day UVR whereas grazers acted as important drivers on the intertidal microalgal community structure.

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“…Solar UV light also closely interacts with people and almost all the lives on the Earth, leading to many health issues, such as skin cancers and eye diseases for people [1]- [3]. Therefore, continuous monitoring for high-intensity UV radiation, including dosage determination, is essential.…”

Section: Introductionmentioning

confidence: 99%

A Ferroelectric Ultraviolet Detector With Constructive Photovoltaic Outputs

Gan

Yao

Lai

et al. 2011

IEEE Electron Device Lett.

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Photovoltaic outputs in semiconductor photodetectors are typically generated at an interfacial space charge region. Here, the output of our ultraviolet detector was enhanced by incorporating a photovoltaic output over the bulk of a ferroelectric thin film for providing a constructive photovoltaic effect in addition to the response from the interfacial mechanism. The working principle was demonstrated with a ferroelectric (Pb 0.97 La 0.03 )(Zr 0.52 Ti 0.48 )O 3 (PLZT) thin film sandwiched between a (La 0.7 Sr 0.3 )MnO 3 top electrode and a Pt bottom electrode, in which the depolarization electric field in the PLZT film was in the same direction with that at the Schottky barrier at the PLZT/Pt interface to realize the constructive photovoltaic effect.

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An electronic personal UV-B-dosimeter

Cited by 22 publications

References 1 publication

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Grazing and UV radiation effects on an Antarctic intertidal microalgal assemblage: a long-term field study

A Ferroelectric Ultraviolet Detector With Constructive Photovoltaic Outputs

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