| Records |
| Author |
Kozaki, Tomoaki; Taketomi, Ryunosuke; Hidaka ,Yuki; Ida, Nagisa; Yasuda, Takeo |
| Title |
Preventive Effect of Morning Bluish LED Light on Light-induced Melatonin Suppression at Night |
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Journal Article |
| Year |
2018 |
Publication |
Journal of Science and Technology in Lighting |
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| Volume |
41 |
Issue |
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Pages |
206-210 |
| Keywords |
Human Health |
Abstract  |
Bright nocturnal light has been known to suppress melatonin secretion. However, bright light exposure during daytime might reduce light-induced melatonin suppression (LIMS) at night. This study aims to evaluate the effect of high correlated color temperature LED light during daytime on LIMS. Male participants were exposed to different light conditions for 3 h in the morning (09:00â??12:00). The light conditions were dim light (<10 lx), 125 lx high correlated color temperature (CCT) LED light, and 250 lx high CCT LED light. The subjects were then exposed to bright light (white light, 300 lx) for 1.5 h at night (01:00â??02:30). Saliva samples were taken before (01:00) and after (02:30) exposure for evaluation of melatonin secretion. There were no significant differences in melatonin secretion before and after night-time light exposure on the 125 lx and 250 lx morning light conditions. Since these light intensities were almost equal to those in our previous study, the high CCT LED light might be appropriate for certain work places (e.g., hospitals and underground spaces), contributing to the reduction of our health risk and also saving energy. |
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LoNNe @ kyba @ |
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1785 |
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Lopes, A.C.C.; Villacorta-Correa, M.A.; Carvalho, T.B. |
| Title |
Lower light intensity reduces larval aggression in matrinxã, Brycon amazonicus |
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Journal Article |
| Year |
2018 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behavioural Processes |
| Volume |
151 |
Issue |
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Pages |
62-66 |
| Keywords |
Animals |
| Abstract |
Brycon amazonicus shows a high frequency of aggressive behavior, which can be a limiting factor in intensive farming systems. Environmental changes can modulate the social interactions of fish and reduce aggression during the different stages of production. Groups of three larvae at 12 h after hatching (HAH) were subjected to different levels of light intensity: low (17 ± 3 lx), intermediate (204 ± 12.17 lx) and high (1,613.33 ± 499.03 lx), with eight replicates for each level. The lower light intensity reduced the frequency of aggressive interactions and locomotor activity exhibited by the animals. Based on these results, light intensity modulates aggression in B. amazonicus larvae. Manipulation of this factor could improve the social conditions of this species during farming and contribute to the development of new production technologies. |
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0376-6357 |
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LoNNe @ kyba @ |
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1810 |
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Tripathy, B.R.; Sajjad, H.; Elvidge, C.D.; Ting, Y.; Pandey, P.C.; Rani, M.; Kumar, P. |
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Modeling of Electric Demand for Sustainable Energy and Management in India Using Spatio-Temporal DMSP-OLS Night-Time Data |
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Journal Article |
| Year |
2018 |
Publication |
Environmental Management |
Abbreviated Journal |
Environ Manage |
| Volume |
61 |
Issue |
4 |
Pages |
615-623 |
| Keywords |
Remote Sensing |
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Changes in the pattern of electric power consumption in India have influenced energy utilization processes and socio-economic development to greater extent during the last few decades. Assessment of spatial distribution of electricity consumption is, thus, essential for projecting availability of energy resource and planning its infrastructure. This paper makes an attempt to model the future electricity demand for sustainable energy and its management in India. The nighttime light database provides a good approximation of availability of energy. We utilized defense meteorological satellite program-operational line-scan system (DMSP-OLS) nighttime satellite data, electricity consumption (1993-2013), gross domestic product (GDP) and population growth to construct the model. We also attempted to examine the sensitiveness of electricity consumption to GDP and population growth. The results revealed that the calibrated DMSP and model has provided realistic information on the electric demand with respect to GDP and population, with a better accuracy of r (2) = 0.91. The electric demand was found to be more sensitive to GDP (r = 0.96) than population growth (r = 0.76) as envisaged through correlation analysis. Hence, the model proved to be useful tool in predicting electric demand for its sustainable use and management. |
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Department of Geography, Jamia Millia Islamia, New Delhi, 110025, India. pavan.jamia@gmail.com |
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English |
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0364-152X |
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PMID:29282533 |
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GFZ @ kyba @ |
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2484 |
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McGlashan, E.M.; Poudel, G.R.; Vidafar, P.; Drummond, S.P.A.; Cain, S.W. |
| Title |
Imaging Individual Differences in the Response of the Human Suprachiasmatic Area to Light |
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Journal Article |
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2018 |
Publication |
Frontiers in Neurology |
Abbreviated Journal |
Front. Neurol. |
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9 |
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Pages |
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Human Health |
| Abstract |
Circadian disruption is associated with poor health outcomes, including sleep and mood disorders. The suprachiasmatic nucleus (SCN) of the anterior hypothalamus acts as the master biological clock in mammals, regulating circadian rhythms throughout the body. The clock is synchronized to the day/night cycle via retinal light exposure. The BOLD-fMRI response of the human suprachiasmatic area to light has been shown to be greater in the night than in the day, consistent with the known sensitivity of the clock to light at night. Whether the BOLD-fMRI response of the human suprachiasmatic area to light is related to a functional outcome has not been demonstrated. In a pilot study (n = 10), we investigated suprachiasmatic area activation in response to light in a 30 s block-paradigm of lights on (100 lux) and lights off (< 1 lux) using the BOLD-fMRI response, compared to each participant's melatonin suppression response to moderate indoor light (100 lux). We found a significant correlation between activation in the suprachiasmatic area in response to light in the scanner and melatonin suppression, with increased melatonin suppression being associated with increased suprachiasmatic area activation in response to the same light level. These preliminary findings are a first step toward using imaging techniques to measure individual differences in circadian light sensitivity, a measure that may have clinical relevance in understanding vulnerability in disorders that are influenced by circadian disruption. |
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1664-2295 |
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NC @ ehyde3 @ |
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2114 |
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| Author |
Abbott, S.M.; Malkani, R.G.; Zee, P.C. |
| Title |
Circadian disruption and human health: A bidirectional relationship |
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Journal Article |
| Year |
2018 |
Publication |
The European Journal of Neuroscience |
Abbreviated Journal |
Eur J Neurosci |
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in press |
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Human Health; Review |
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Circadian rhythm disorders have been classically associated with disorders of abnormal timing of the sleep-wake cycle, however circadian dysfunction can play a role in a wide range of pathology, ranging from the increased risk for cardiometabolic disease and malignancy in shift workers, prompting the need for a new field focused on the larger concept of circadian medicine. The relationship between circadian disruption and human health is bidirectional, with changes in circadian amplitude often preceding the classical symptoms of neurodegenerative disorders. As our understanding of the importance of circadian dysfunction in disease grows, we need to develop better clinical techniques for identifying circadian rhythms and also develop circadian based strategies for disease management. Overall this review highlights the need to bring the concept of time to all aspects of medicine, emphasizing circadian medicine as a prime example of both personalized and precision medicine. |
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Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois |
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English |
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0953-816X |
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PMID:30549337 |
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GFZ @ kyba @ |
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2154 |
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