| Records |
Author  |
Agarwal, N.; Srivastava, S.; Malik, S.; Rani, S.; Kumar, V. |
| Title |
Altered light conditions during spring: Effects on timing of migration and reproduction in migratory redheaded bunting (Emberiza bruniceps) |
Type |
Journal Article |
| Year |
2015 |
Publication |
Biological Rhythm Research |
Abbreviated Journal |
Biological Rhythm Research |
| Volume |
46 |
Issue |
5 |
Pages |
647-657 |
| Keywords |
Animals |
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| ISSN |
0929-1016 |
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no |
| Call Number |
LoNNe @ christopher.kyba @ |
Serial |
1166 |
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| Author |
Agbaria, S.; Haim, A.; Fares, F.; Zubidat, A.E. |
| Title |
Epigenetic modification in 4T1 mouse breast cancer model by artificial light at night and melatonin – the role of DNA-methyltransferase |
Type |
Journal Article |
| Year |
2019 |
Publication |
Chronobiology International |
Abbreviated Journal |
Chronobiol Int |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Animals |
| Abstract |
Currently, one of the most disputed hypotheses regarding breast cancer (BC) development is exposure to short wavelength artificial light at night (ALAN) as multiple studies suggest a possible link between them. This link is suggested to be mediated by nocturnal melatonin suppression that plays an integral role in circadian regulations including cell division. The objective of the research was to evaluate effects of 1 x 30 min/midnight ALAN (134 micro Wcm(-2), 460 nm) with or without nocturnal melatonin supplement on tumor development and epigenetic responses in 4T1 tumor-bearing BALB/c mice. Mice were monitored for body mass (Wb) and tumor volume for 3 weeks and thereafter urine samples were collected at regular intervals for determining daily rhythms of 6-sulfatoxymelatonin (6-SMT). Finally, mice were sacrificed and the tumor, lungs, liver, and spleen were excised for analyzing the total activity of DNA methyltransferases (DNMT) and global DNA methylation (GDM) levels. Mice exposed to ALAN significantly reduced 6-SMT levels and increased Wb, tumor volume, and lung metastasis compared with controls. These effects were diminished by melatonin. The DNMT activity and GDM levels showed tissue-specific response. The enzymatic activity and GDM levels were lower in tumor and liver and higher in spleen and lungs under ALAN compared with controls. Our results suggest that ALAN disrupts the melatonin rhythm and potentially leading to increased BC burden by affecting DNMT activity and GDM levels. These data may also be applicable to early detection and management of BC by monitoring melatonin and GDM levels as early biomarker of ALAN circadian disruption. |
| Address |
b The Israeli Center for Interdisciplinary Research in Chronobiology , University of Haifa , Haifa , Israel; Zubidat3(at)013.net.il |
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Taylor & Francis |
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English |
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English |
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0742-0528 |
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PMID:30746962 |
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no |
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IDA @ john @ |
Serial |
2211 |
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| Author |
Agnew, J.; Gillespie, T.W.; Gonzalez, J.; Min, B. |
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Baghdad Nights: Evaluating the US Military ‘Surge’ Using Nighttime Light Signatures |
Type |
Journal Article |
| Year |
2008 |
Publication |
Environment and Planning A |
Abbreviated Journal |
Environ Plan A |
| Volume |
40 |
Issue |
10 |
Pages |
2285-2295 |
| Keywords |
Remote Sensing; Commentary |
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0308-518X |
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no |
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GFZ @ kyba @ |
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2028 |
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| Author |
Ahmed, AK; Sadik, MA |
| Title |
Study of sky brightness profiles of Baghdad and Karbala cities in Iraq |
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Journal Article |
| Year |
2018 |
Publication |
International Journal of Science and Nature |
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| Volume |
9 |
Issue |
1 |
Pages |
18-24 |
| Keywords |
Skyglow |
| Abstract |
This study was used two detectors only i.e., the human eye and photometer of Sky Quality Meter (SQM-LU) during the time of sunrise and sunset. The human eye used to determine the moon's phase. The measurements of sky brightness, by using SQM-LU, performed via two locations that covered Baghdad and Karbala in Iraq from December 2016 through March 2017 intermittently. The research focused only on light perceived by detectors and not how it happens. The aim of research is to find a mathematical formula (i.e . brightness contrast) between the sky brightness against the solar altitude by taking moon illumination as the standard reference. Analytical software based on the Python's PyEphem astrometry library was developed to calculate the solar altitude at the two locations. Finally, the formula of sky brightness obtained from this work is an important key that contributed to finding the simulated sky brightness, when the sun's altitude is known. |
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no |
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GFZ @ kyba @ |
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1851 |
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| Author |
Ahn, H.; Lee, S.; Jo, E. |
| Title |
Assessment on Lighting Management Zones for Light pollution in Gwangju Metropolitan City |
Type |
Journal Article |
| Year |
2018 |
Publication |
한국태양에너지학회 학술대회논문집 |
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Lighting; Planning |
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no |
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GFZ @ kyba @ |
Serial |
1960 |
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