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Boswell, W.T.; Boswell, M.; Walter, D.J.; Navarro, K.L.; Chang, J.; Lu, Y.; Savage, M.G.; Shen, J.; Walter, R.B. |
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Title |
Exposure to 4100K fluorescent light elicits sex specific transcriptional responses in Xiphophorus maculatus skin |
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Journal Article |
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Year |
2018 |
Publication |
Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP |
Abbreviated Journal |
Comp Biochem Physiol C Toxicol Pharmacol |
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Volume |
208 |
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Pages |
96-104 |
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Keywords |
Animals |
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Abstract |
It has been reported that exposure to artificial light may affect oxygen intake, heart rate, absorption of vitamins and minerals, and behavioral responses in humans. We have reported specific gene expression responses in the skin of Xiphophorus fish after exposure to ultraviolet light (UV), as well as, both broad spectrum and narrow waveband visible light. In regard to fluorescent light (FL), we have shown that male X. maculatus exposed to 4100K FL (i.e. “cool white”) rapidly suppress transcription of many genes involved with DNA replication and repair, chromosomal segregation, and cell cycle progression in skin. We have also detailed sex specific transcriptional responses of Xiphophorus skin after exposure to UVB. However, investigation of gender differences in global gene expression response after exposure to 4100K FL has not been reported, despite common use of this FL source for residential, commercial, and animal facility illumination. Here, we compare RNASeq results analyzed to assess changes in the global transcription profiles of female and male X. maculatus skin in response to 4100K FL exposure. Our results suggest 4100K FL exposure incites a sex-biased genetic response including up-modulation of inflammation in females and down modulation of DNA repair/replication in males. In addition, we identify clusters of genes that become oppositely modulated in males and females after FL exposure that are principally involved in cell death and cell proliferation. |
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Department of Chemistry and Biochemistry, Xiphophorus Genetic Stock Center, Texas State University, 601 University Drive, San Marcos, TX 78666, USA. Electronic address: RW12@txstate.edu |
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1532-0456 |
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PMID:28965926 |
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Call Number |
LoNNe @ kyba @ |
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1739 |
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Author |
Bouroussis, C.A.; Topalis, F.V. |
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Title |
The effect of the spectral response of measurement instruments in the assessment of night sky brightness |
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Journal Article |
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Year |
2018 |
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Journal of Quantitative Spectroscopy and Radiative Transfer |
Abbreviated Journal |
Journal of Quantitative Spectroscopy and Radiative Transfer |
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Volume |
216 |
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56-69 |
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Keywords |
Skyglow; Instrumentation |
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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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Call Number |
GFZ @ kyba @ |
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1908 |
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Bouroussis, C.A.; Topalis, F.V. |
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Title |
Assessment of outdoor lighting installations and their impact on light pollution using unmanned aircraft systems – The concept of the drone-gonio-photometer |
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Journal Article |
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2020 |
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Journal of Quantitative Spectroscopy and Radiative Transfer |
Abbreviated Journal |
Journal of Quantitative Spectroscopy and Radiative Transfer |
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253 |
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107155 |
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Instrumentation; Lighting |
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This paper presents the ongoing work of the lighting laboratory to develop a standardized method for the measurement of several types of lighting installations using unmanned aircraft systems. The technology of unmanned aircraft systems can incorporate multiple types of sensors and can be programmed to fly in predefined areas and routes in order to perform complex measurements with limited human intervention. This technology provides the freedom of measurements from several angular positions and altitudes in a fast, easy, accurate and repeatable way. The overall aim of this work is to assess the lighting installations, not only against the applicable lighting standards but also to investigate and reveal issues related to light pollution and obtrusive lighting. The latter are issues that in most cases are neglected due to the lack of standardized methods of calculation and measurement. Current assessment methods require illuminance or luminance measurements of horizontal and vertical surfaces generally from the ground. The proposed approach provides a holistic three-dimensional evaluation of the lighting installations beyond the common methods and geometries and opens the discussion for future update of the relevant standards on outdoor lighting. In the scope of this paper, several proof-of-concept cases are presented. |
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Lighting Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Polytechniou Str, 15780, Zografou, Athens, Greece; bouroussis(at)gmail.com |
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Elsevier |
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English |
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English |
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0022-4073 |
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Call Number |
GFZ @ kyba @ |
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2996 |
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Author |
Bowden, J. |
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Title |
An Analysis of Factors Affecting Catches of Insects in Light-Traps |
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Journal Article |
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Year |
1982 |
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Bulletin of Entomological Research |
Abbreviated Journal |
Bull. Entomol. Res. |
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72 |
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4 |
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535-556 |
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Keywords |
Ecology; Animals |
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Analysis of published data on catches of insects in light-traps with a variety of light sources and of different designs showed that all conformed to the previously proposed model describing the functioning of a light-trap: catch = constant × where W = trap illumination and I = background illumination. Light-trap catches in differing cloud conditions and in open and woodland situations also varied as predicted by the model. A table of correction factors for different amounts of cloud cover is provided. The results are discussed in relation to use of light-traps and interpretation of light-trap data. |
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0007-4853 |
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Call Number |
GFZ @ kyba @ |
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2589 |
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Author |
Bowlby, G.M.S. |
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Title |
Some Preliminary Investigations into the Effects of Light on Broilers |
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Journal Article |
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Year |
1957 |
Publication |
World's Poultry Science Journal |
Abbreviated Journal |
Worlds Poult. Sci. J. |
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Volume |
13 |
Issue |
03 |
Pages |
214-216 |
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Animals |
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0043-9339 |
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GFZ @ kyba @ |
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2426 |
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