| Records |
| Author |
Shen, J.; Zhu, X.; Gu, Y.; Zhang, C.; Huang, J.; Qing, X. |
| Title |
Toxic effect of visible light on Drosophila lifespan depending upon diet protein content |
Type |
Journal Article |
| Year |
2018 |
Publication |
The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences |
Abbreviated Journal |
J Gerontol A Biol Sci Med Sci |
| Volume |
74 |
Issue |
2 |
Pages |
163-167 |
| Keywords |
Animals |
| Abstract |
We investigated the toxic effect of visible light on Drosophila lifespan in both sexes. The toxic effect of ultraviolet (UV) light on organisms is well known. However, the effects of illumination with visible light remain unclear. Here, we found that visible light could be toxic to Drosophila survival, depending on the protein content in diet. In addition, further analysis revealed significant interaction between light and sex, and showed that strong light shortened life span by causing opposite direction changes in mortality rate parameters in females versus males. Our findings suggest that photoageing may be a general phenomenon, and support the theory of sexual antagonistic pleiotropy in aging intervention. The results caution that exposure to visible light could be hazardous to life span and suggest that identification of the underlying mechanism would allow better understanding of aging intervention. |
| Address |
College of Life Information Science & Instrument Engineering, Hangzhou Dianzi University, Hangzhou, China |
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| Language |
English |
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Series Issue |
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Edition |
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| ISSN |
1079-5006 |
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| Notes |
PMID:29506144 |
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no |
Call Number  |
GFZ @ kyba @ |
Serial |
1903 |
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| Author |
Bian, Z.; Yang, Q.; Li, T.; Cheng, R.; Barnett, Y.; Lu, C. |
| Title |
Study of the beneficial effects of green light on lettuce grown under short-term continuous red and blue light-emitting diodes |
Type |
Journal Article |
| Year |
2018 |
Publication |
Physiologia Plantarum |
Abbreviated Journal |
Physiol Plant |
| Volume |
164 |
Issue |
2 |
Pages |
226-240 |
| Keywords |
Plants |
| Abstract |
Red and blue light are the most important light spectra for driving photosynthesis to produce adequate crop yield. It is also believed that green light may contribute to adaptations to growth. However, the effects of green light, which can trigger specific and necessary responses of plant growth, have been underestimated in the past. In this study, lettuce (Lactuca sativa L.) was exposed to different continuous light (CL) conditions for 48 h by a combination of red and blue light-emitting diodes (LEDs) supplemented with or without green LEDs, in an environmental-controlled growth chamber. Green light supplementation enhanced photosynthetic capacity by increasing net photosynthetic rates (Pn ), maximal photochemical efficiency (Fv /Fm ), electron transport for carbon fixation (JPSII ) and chlorophyll content in plants under the CL treatment. Green light decreased malondialdehyde and H2 O2 accumulation by increasing the activities of superoxide dismutase (SOD; EC 1.15.1.1) and ascorbate peroxidase (APX; EC 1.11.1.11) after 24 h of CL. Supplemental green light significantly increased the expression of photosynthetic genes LHCb and PsbA from 6 to 12 h, and these gene expression were maintained at higher levels than those under other light conditions between 12 and 24 h. However, a notable down-regulation of both LHCb and PsbA was observed during 24 to 48 h. These results indicate that the effects of green light on lettuce plant growth, via enhancing activity of particular components of antioxidantive enzyme system and promoting of LHCb and PsbA expression to maintain higher photosynthetic capacity, alleviated a number of the negative effects caused by CL. |
| Address |
School of Animal, Rural and Environmental Science, Brackenhurst Campus, Nottingham Trent University, NG25 0QF, UK |
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English |
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0031-9317 |
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| Notes |
PMID:29493775 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
1905 |
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| Author |
Rybnikova, N.; Portnov, B.A. |
| Title |
Population-level study links short-wavelength nighttime illumination with breast cancer incidence in a major metropolitan area |
Type |
Journal Article |
| Year |
2018 |
Publication |
Chronobiology International |
Abbreviated Journal |
Chronobiol Int |
| Volume |
35 |
Issue |
9 |
Pages |
1198-1208 |
| Keywords |
Human Health |
| Abstract |
Several population-level studies revealed a positive association between breast cancer (BC) incidence and artificial light at night (ALAN) exposure. However, the effect of short-wavelength illumination, implicated by laboratory research and small-scale cohort studies as the main driving force behind BC-ALAN association, has not been supported by any population-level study carried out to date. We investigated a possible link between BC and ALAN of different subspectra using a multi-spectral year-2011 satellite image, taken from the International Space Station, and superimposing it with year-2013 BC incidence data available for the Great Haifa Metropolitan Area in Israel. The analysis was performed using both ordinary least square (OLS) and spatial dependency models, controlling for socioeconomic and locational attributes of the study area. The study revealed strong associations between BC and blue and green light subspectra (B = 0.336 +/- 0.001 and B = 0.335 +/- 0.002, respectively; p < 0.01), compared to a somewhat weaker effect for the red subspectrum (B = 0.056 +/- 0.001; p < 0.01). However, spatial dependency models, controlling for spatial autocorrelation of regression residuals, confirmed only a positive association between BC incidence and short-wavelength (blue) ALAN subspectrum (z = 2.462, p < 0.05) while reporting insignificant associations between BC and either green (z = 1.425, p > 0.1) or red (z = -0.604, p > 0.1) subspectra. The obtained result is in line with the results of laboratory- and small-scale cohort studies linking short-wavelength nighttime illumination with circadian disruption and melatonin suppression. The detected effect of blue lights on BC incidence may help to develop informed illumination policies aimed at minimizing the adverse health effects of ALAN exposure on human health. |
| Address |
a Department of Natural Resources and Environmental Management , University of Haifa , Haifa , Israel |
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English |
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Edition |
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| ISSN |
0742-0528 |
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| Notes |
PMID:29768068 |
Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
1906 |
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| Author |
Aubé, M.; Simoneau, A.; Wainscoat, R.; Nelson, L. |
| Title |
Modeling the effects of phosphor converted LED lighting to the night sky of the Haleakala Observatory, Hawaii |
Type |
Journal Article |
| Year |
2018 |
Publication |
Monthly Notices of the Royal Astronomical Society |
Abbreviated Journal |
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| Volume |
478 |
Issue |
2 |
Pages |
1776-1783 |
| Keywords |
Skyglow |
| Abstract |
The goal of this study is to evaluate the current level of light pollution in the night sky at the Haleakala Observatory on the island of Maui in Hawaii. This is accomplished with a numerical model that was tested in the first International Dark Sky Reserve located in Mont-Mégantic National Park in Canada. The model uses ground data on the artificial light sources present in the region of study, geographical data, and remotely sensed data for: 1) the nightly upward radiance; 2) the terrain elevation; and, 3) the ground spectral reflectance of the region. The results of the model give a measure of the current state of the sky spectral radiance at the Haleakala Observatory. Then, using the current state as a reference point, multiple light conversion plans are elaborated and evaluated using the model. We can thus estimate the expected impact of each conversion plan on the night sky radiance spectrum. A complete conversion to white (LEDs) with (CCT) of 4000K and 3000K are contrasted with a conversion using (PC) amber (LEDs). We include recommendations concerning the street lamps to be used in sensitive areas like the cities of Kahului and Kihei and suggest best lighting practices related to the color of lamps used at night. |
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0035-8711 |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
1907 |
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| Author |
Bouroussis, C.A.; Topalis, F.V. |
| Title |
The effect of the spectral response of measurement instruments in the assessment of night sky brightness |
Type |
Journal Article |
| Year |
2018 |
Publication |
Journal of Quantitative Spectroscopy and Radiative Transfer |
Abbreviated Journal |
Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume |
216 |
Issue |
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Pages |
56-69 |
| Keywords |
Skyglow; Instrumentation |
| Abstract |
This paper deals with the errors and uncertainties in skyglow measurements caused by the variation of sky's spectrum. It considers the theoretical spectral response of common instruments that are used for light pollution assessment. Various types of light sources were used in this investigation. This study calculates the spectral mismatch errors and the corresponding correction factors for each combination of instrument and light source. The calculation method is described and the results are presented in multiple figures. Calculated data show a big variation in potential errors that can be introduced when comparing readings of diverse instruments without considering the sky spectrum variation. This makes the spectral data of the sky a mandatory input to the dark sky assessment. Useful conclusions, related to instruments with better or worse behaviour, are derived from the calculations. The paper also includes suggestions on how to conduct multi-instrument measurements with or without spectral data. |
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0022-4073 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
1908 |
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