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Author Stevens, R.G.
Title Electric power use and breast cancer: a hypothesis. Type Journal Article
Year 1987 Publication Am J Epidemiol Abbreviated Journal
Volume 125 Issue (up) Pages 556-561
Keywords Human Health
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Notes Approved no
Call Number LoNNe @ christopher.kyba @ Serial 533
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Author Aschoff, J.
Title Comparative physiology: diurnal rhythms Type Journal Article
Year 1963 Publication Annual Review of Physiology Abbreviated Journal Annu Rev Physiol
Volume 25 Issue (up) Pages 581-600
Keywords Human Health; Adaptation, Physiological; *Periodicity; *Adaptation, Physiological; *Periodicity
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Language English Summary Language Original Title
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ISSN 0066-4278 ISBN Medium
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Notes PMID:13965146 Approved no
Call Number LoNNe @ kagoburian @ Serial 710
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Author Aschoff, J.
Title Temporal orientation: circadian clocks in animals and humans Type Journal Article
Year 1989 Publication Animal Behaviour Abbreviated Journal Animal Behaviour
Volume 37 Issue (up) Pages 881-896
Keywords Human Health; Animals
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ISSN 0003-3472 ISBN Medium
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 713
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Author Bauer, S.E.; Wagner, S.E.; Burch, J.; Bayakly, R.; Vena, J.E.
Title A case-referent study: light at night and breast cancer risk in Georgia Type Journal Article
Year 2013 Publication International Journal of Health Geographics Abbreviated Journal Int J Health Geogr
Volume 12 Issue (up) Pages 23
Keywords Human Health; Aged; Aged, 80 and over; Breast Neoplasms/*diagnosis/*epidemiology; Case-Control Studies; Circadian Rhythm/*physiology; Female; Georgia/epidemiology; Humans; Lighting/*adverse effects; Lung Neoplasms/diagnosis/epidemiology; Middle Aged; Registries; Risk Factors
Abstract BACKGROUND: Literature has identified detrimental health effects from the indiscriminate use of artificial nighttime light. We examined the co-distribution of light at night (LAN) and breast cancer (BC) incidence in Georgia, with the goal to contribute to the accumulating evidence that exposure to LAN increases risk of BC. METHODS: Using Georgia Comprehensive Cancer Registry data (2000-2007), we conducted a case-referent study among 34,053 BC cases and 14,458 lung cancer referents. Individuals with lung cancer were used as referents to control for other cancer risk factors that may be associated with elevated LAN, such as air pollution, and since this cancer type was not previously associated with LAN or circadian rhythm disruption. DMSP-OLS Nighttime Light Time Series satellite images (1992-2007) were used to estimate LAN levels; low (0-20 watts per sterradian cm(2)), medium (21-41 watts per sterradian cm(2)), high (>41 watts per sterradian cm(2)). LAN levels were extracted for each year of exposure prior to case/referent diagnosis in ArcGIS. RESULTS: Odds ratios (OR) and 95% confidence intervals (CI) were estimated using logistic regression models controlling for individual-level year of diagnosis, race, age at diagnosis, tumor grade, stage; and population-level determinants including metropolitan statistical area (MSA) status, births per 1,000 women aged 15-50, percentage of female smokers, MSA population mobility, and percentage of population over 16 in the labor force. We found that overall BC incidence was associated with high LAN exposure (OR = 1.12, 95% CI [1.04, 1.20]). When stratified by race, LAN exposure was associated with increased BC risk among whites (OR = 1.13, 95% CI [1.05, 1.22]), but not among blacks (OR = 1.02, 95% CI [0.82, 1.28]). CONCLUSIONS: Our results suggest positive associations between LAN and BC incidence, especially among whites. The consistency of our findings with previous studies suggests that there could be fundamental biological links between exposure to artificial LAN and increased BC incidence, although additional research using exposure metrics at the individual level is required to confirm or refute these findings.
Address Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, Athens, GA, USA. secbauer@ufl.edu
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Language English Summary Language Original Title
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ISSN 1476-072X ISBN Medium
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Notes PMID:23594790; PMCID:PMC3651306 Approved no
Call Number LoNNe @ kagoburian @ Serial 718
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Author Benot, S.; R. Goberna; R. J. Reiter; S. Garcia-Mauriño; C. Osuna; J. M. Guerrero
Title Physiological levels of melatonin contribute to the antioxidant capacity of human serum Type Journal Article
Year 1999 Publication Journal of Pineal Research Abbreviated Journal
Volume 27 Issue (up) Pages 59-64
Keywords Human Health
Abstract This work evaluates whether physiological concentrations of the pineal secretory product melatonin contribute to the total antioxidant status (TAS) of human serum. Day and nighttime serum samples were collected from healthy volunteers ranging from 2 to 89 years of age and used to measure melatonin and TAS. Results showed that both melatonin and TAS in human serum exhibited 24 hr variations with nocturnal peak values at 01:00 hr. Moreover, exposure of volunteers to light at night resulted in clear decreases of both TAS and melatonin. Furthermore, when melatonin was removed from sera collected at night, the TAS value of the sample was reduced to basal daytime values. In aging studies, it was found that nocturnal serum values of TAS and melatonin exhibited maximal values during the first four decades; thereafter, these values decreased as age advanced. In 60-year-old individuals, day/night differences in serum melatonin and TAS levels were clearly diminished, by more than 80%, with these differences being completely abolished in older individuals. Our results suggest that melatonin contributes to the total antioxidative capability of human serum. This antioxidant contribution of melatonin is reduced as age advances correlating with the age-related reduction of melatonin.
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 719
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