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Author Papantoniou, K.; Pozo, O.J.; Espinosa, A.; Marcos, J.; Castano-Vinyals, G.; Basagana, X.; Ribas, F.C.; Mirabent, J.; Martin, J.; Carenys, G.; Martin, C.R.; Middleton, B.; Skene, D.J.; Kogevinas, M. url  doi
openurl 
  Title Circadian variation of melatonin, light exposure, and diurnal preference in day and night shift workers of both sexes Type Journal Article
  Year 2014 Publication Cancer Epidemiology, Biomarkers & Prevention : a Publication of the American Association for Cancer Research, Cosponsored by the American Society of Preventive Oncology Abbreviated Journal Cancer Epidemiol Biomarkers Prev  
  Volume 23 Issue 7 Pages (down) 1176-1186  
  Keywords Human Health, physiology  
  Abstract BACKGROUND: Light-at-night has been shown in experimental studies to disrupt melatonin production but this has only partly been confirmed in studies of night shift workers. In this cross-sectional study, we examined the circadian variation of melatonin in relation to shift status, individual levels of light-at-night exposure, and diurnal preference, an attribute reflecting personal preference for activity in the morning or evening. METHODS: One hundred and seventeen workers (75 night and 42 day) of both sexes, ages 22 to 64 years, were recruited from four companies. Participants collected urine samples from all voids over 24 hours and wore a data logger continuously recording their light exposure. Sociodemographic, occupational, lifestyle, and diurnal preference information were collected by interview. Concentrations of urinary 6-sulfatoxymelatonin (aMT6s), the main melatonin metabolite, were measured. RESULTS: Mean aMT6s levels were lower in night [10.9 ng/mg creatinine/hour; 95% confidence interval (CI), 9.5-12.6] compared with day workers (15.4; 95% CI, 12.3-19.3). The lowest aMT6s levels were observed in night workers with morning preference (6.4; 95% CI, 3.0-13.6). Peak time of aMT6s production occurred 3 hours later in night (08:42 hour, 95% CI, 07:48-09:42) compared with day workers (05:36 hour, 95% CI, 05:06-06:12). Phase delay was stronger among subjects with higher light-at-night exposure and number of nights worked. CONCLUSIONS: Night shift workers had lower levels and a delay in peak time of aMT6s production over a 24-hour period. Differences were modified by diurnal preference and intensity of light-at-night exposure. IMPACT: Night shift work affects levels and timing of melatonin production and both parameters may relate to future cancer risk.  
  Address Authors' Affiliations: Centre for Research in Environmental Epidemiology (CREAL); IMIM (Hospital del Mar Medical Research Institute); Universitat Pompeu Fabra, Barcelona (UPF); CIBER Epidemiologia y Salud Publica (CIBERESP), Madrid, Spain; National School of Public Health, Athens, Greece  
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  ISSN 1055-9965 ISBN Medium  
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  Notes PMID:24812038 Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial 1111  
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Author Miler, M.; Sosic-Jurjevic, B.; Nestorovic, N.; Ristic, N.; Medigovic, I.; Savin, S.; Milosevic, V. url  doi
openurl 
  Title Morphological and functional changes in pituitary-thyroid axis following prolonged exposure of female rats to constant light Type Journal Article
  Year 2014 Publication Journal of Morphology Abbreviated Journal J Morphol  
  Volume 275 Issue 10 Pages (down) 1161-1172  
  Keywords TSH cells; constant light; immunohistochemistry; pituitary; rat; thyroid; light exposure  
  Abstract Light regulates numerous physiological functions and synchronizes them with the environment, in part by adjusting secretion of different hormones. We hypothesized that constant light (CL) would disturb pituitary-thyroid axis. Our aim was to determine morphological and functional changes in this endocrine system in such extreme conditions and, based on the obtained results, to propose the underlying mechanism(s). Starting from the thirtieth postnatal day, female Wistar rats were exposed to CL (600 lx) for the following 95 days. The controls were maintained under the regular laboratory lighting conditions. After decapitation, pituitaries and thyroids were prepared for further histomorphometric, immunohistochemical, and immunofluorescence examinations. Concentration of thyroid stimulating hormone (TSH), total T4 and T3 (TH) were determined. Thyroid tissue of light-treated rats was characterized by microfollicular structure. We detected no change in total thyroid volume, localization and accumulation of thyroglobulin, thyroid peroxidase, and sodium-iodide symporter in the follicular epithelium of CL rats. The volume of follicular epithelium and activation index were increased, while volume of the colloid and serum levels of TH decreased. In the pituitary, the relative intensity of TSH beta-immunofluorescence signal within the cytoplasm of thyrotrophs increased, but their average cell volume and the relative volume density decreased. Serum TSH was unaltered. We conclude that exposure of female rats to CL induced alterations in pituitary-thyroid axis. Thyroid tissue was characterized by microfollicular structure. Serum TH levels were reduced without accompanying increase in serum TSH. We hypothesize that increased secretion and clearance of TH together with unchanged or even decreased hormonal synthesis, resulted in decreased serum TH levels in CL group. We assume this decrease consequently led to increased synthesis and/or accumulation of pituitary TSH. However, decreased average TSH cell volume and relative volume density, together with unchanged serum TSH, point to additional, negative regulation of thyrotrophs. J. Morphol., 2014. (c) 2014 Wiley Periodicals, Inc.  
  Address Department of Cytology, Institute for Biological Research “Sinisa Stankovic,” University of Belgrade, Belgrade, Serbia  
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  ISSN 0022-2887 ISBN Medium  
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  Notes PMID:24797691 Approved no  
  Call Number IDA @ john @ Serial 304  
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Author Arnaud Da Silva, Jelmer M. Samplonius, Emmi Schlicht, Mihai Valcu, Bart Kempenaers url  doi
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  Title Artificial night lighting rather than traffic noise affects the daily timing of dawn and dusk singing in common European songbirds Type Journal Article
  Year 2014 Publication Behavioral Ecology Abbreviated Journal  
  Volume 25 Issue 5 Pages (down) 1037-1047  
  Keywords animal, birds, dawn chorus, dusk chorus, light intensity, light pollution, noise pollution, seasonality, songbird, weather  
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  Call Number LoNNe @ schroer @ Serial 1105  
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Author Abd Mutalib, A.H.; Fadzly, N.; Ahmad, A.; Nasir, N. url  doi
openurl 
  Title Understanding nesting ecology and behaviour of green marine turtles at Setiu, Terengganu, Malaysia Type Journal Article
  Year 2014 Publication Marine Ecology Abbreviated Journal Mar Ecol  
  Volume 36 Issue 4 Pages (down) 1003-1012  
  Keywords Chelonia mydas; conservation; green turtles; nesting behaviour; nesting ecology; sea turtles; reptiles; marine reptiles; verterbrates; ecology; Sea turtle conservation; Setiu; Malaysia  
  Abstract In this paper, we emphasize the importance of understanding the nesting ecology and nesting behaviour of green marine turtles (Chelonia mydas). Data were collected from 2007 until 2012 from nesting beaches at Setiu Terengganu, Malaysia. We focused on one of the beaches, Telaga Papan, based on data collected in 2012. We recorded the distribution of nesting areas, the emergence hour and the correlation between successful nesting attempts and false crawls. Telaga Papan had a significantly higher distribution of green marine turtle nesting compared with the other five beaches (ANOVA, F5,42 = 8.874, P < 0.01, mean = 36.750 ± 3.727). The highest number of successful nesting attempts was recorded in 2012 (mean = 28.714). A majority of the species landed between 22:00 and 23:59 h (25%). There was a strong correlation between successful nesting attempts and false crawls (rs = 0.883, P = 0.02). Based on these findings on the nesting ecology and nesting behaviour of green marine turtles, we suggest that scientific research, strict monitoring, awareness programs and policy implementation should be carried out proactively. Such activities are necessary to reduce the anthropogenic pressures at the nesting beaches as well as to ensure more successful nesting attempts of green marine turtles in Setiu.  
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  ISSN 0173-9565 ISBN Medium  
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  Call Number IDA @ john @ Serial 369  
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Author He, C.; Ma, Q.; Liu, Z.; Zhang, Q. url  doi
openurl 
  Title Modeling the spatiotemporal dynamics of electric power consumption in Mainland China using saturation-corrected DMSP/OLS nighttime stable light data Type Journal Article
  Year 2014 Publication International Journal of Digital Earth Abbreviated Journal International Journal of Digital Earth  
  Volume 7 Issue 12 Pages (down) 993-1014  
  Keywords Remote Sensing  
  Abstract Obtaining timely and accurate data on the spatiotemporal dynamics of electric power consumption (EPC) is crucial for the effective utilization of electric power in China. The Defense Meteorological Satellite Program's Operational Linescan System (DMSP/OLS) nighttime stable light (NSL) data have good potential for estimating EPC effectively at large scales. However, saturated lighted pixels contained within the NSL data limit the accuracy of EPC estimation. We developed a new method to correct the saturated lighted pixels, using the SPOT VEGETATION (SPOT/VGT) 10-day synthesis product (S10) normalized difference vegetation index (NDVI) data and then modeled the spatiotemporal dynamics of EPC in Mainland China from 2000 to 2008. The results demonstrated the reliability of our approach with an average R value of 0.93 (P<0.001) and an average relative error of −28.92%. EPC in Mainland China showed an average annual growth rate of 13.46% during the study period from 1198.23 billion kWh in 2000 to 3290.51 billion kWh in 2008. EPC in Mainland China also showed clear regional variation. Northern coastal China and eastern coastal China consumed 37.61% of the total EPC in Mainland China, with only 25.96% of the population and 6.11% of the area.  
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  ISSN 1753-8947 ISBN Medium  
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  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2488  
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