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| Author | Chaves, I.; Pokorny, R.; Byrdin, M.; Hoang, N.; Ritz, T.; Brettel, K.; Essen, L.-O.; van der Horst, G.T.J.; Batschauer, A.; Ahmad, M. | ||||
| Title | The cryptochromes: blue light photoreceptors in plants and animals | Type | Journal Article | ||
| Year | 2011 | Publication | Annual Review of Plant Biology | Abbreviated Journal | Annu Rev Plant Biol |
| Volume | 62 | Issue  |
Pages | 335-364 | |
| Keywords | Adenosine Triphosphate/metabolism; Animals; Cryptochromes/chemistry/classification/*physiology; DNA Repair; Deoxyribodipyrimidine Photo-Lyase/chemistry/classification/physiology; Homing Behavior; Insects/physiology; *Light Signal Transduction; Magnetics; Mice; Oxidation-Reduction; Phosphorylation/physiology; Plants/*metabolism; blue light | ||||
| Abstract | Cryptochromes are flavoprotein photoreceptors first identified in Arabidopsis thaliana, where they play key roles in growth and development. Subsequently identified in prokaryotes, archaea, and many eukaryotes, cryptochromes function in the animal circadian clock and are proposed as magnetoreceptors in migratory birds. Cryptochromes are closely structurally related to photolyases, evolutionarily ancient flavoproteins that catalyze light-dependent DNA repair. Here, we review the structural, photochemical, and molecular properties of cry-DASH, plant, and animal cryptochromes in relation to biological signaling mechanisms and uncover common features that may contribute to better understanding the function of cryptochromes in diverse systems including in man. | ||||
| Address | Department of Genetics, Erasmus University Medical Center, 3000 CA Rotterdam, The Netherlands. i.chaves@erasmusmc.nl | ||||
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| Language | English | Summary Language | Original Title | ||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1543-5008 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | PMID:21526969 | Approved | no | ||
| Call Number | IDA @ john @ | Serial | 341 | ||
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| Author | Kayaba, M.; Iwayama, K.; Ogata, H.; Seya, Y.; Tokuyama, K.; Satoh, M. | ||||
| Title | Drowsiness and low energy metabolism in the following morning induced by nocturnal blue light exposure | Type | Journal Article | ||
| Year | 2013 | Publication | Sleep Medicine | Abbreviated Journal | Sleep Medicine |
| Volume | 14 | Issue |
Pages | e166-e167 | |
| Keywords | blue light; light exposure; light at night; circadian disruption; drowsiness; melatonin; metabolism; sleep | ||||
| Abstract | Introduction Evening light exposure debilitates the circadian rhythm and elicits sleep disturbance. Blue light peak wavelengths, around 460 nm, suppress melatonin secretion via the non-image-forming system. The effects of nocturnal blue light exposure on sleep have been reported to be specific but rather small (Münch, 2008). This study was designed to assess the effect of nocturnal blue light exposure on sleep and energy metabolism until noon the next day. Materials and methods Nine healthy male volunteers aged between 21 and 25 participated in this study which had a balanced cross-over design with intrasubject comparisons. After 2 h dark adaptation, the subjects were exposed to blue light or no light for 2 h. The peak wavelength of the blue LED was 465 nm, and the horizontal irradiance of the blue light at the height of eye was at 7.02fÊW/cm2. Sleep was recorded polysomnographically, and energy metabolism was measured with a whole body indirect calorimeter. Results There were no significant differences in sleep architecture and energy metabolism during the night. However, dozing (stages 1 and 2) was significantly higher (26.0 < 29.4 vs 6.3 < 8.1 min, P < 0.05), and energy expenditure, O2 consumption, CO2 production and the thermic effect of food (increase in energy expenditure after breakfast) were significantly lower the following morning in the blue light exposure subjects. Conclusion Contrary to our expectation, sleep architecture and energy metabolism during sleep were not affected by evening exposure to blue light. It might be due to our milder intervention by which subjects in a sitting position did not gaze at the light source set on the ceiling, while the subjects in previous studies directly received brighter light via custom built goggles (Cajochen, 2005; Münch, 2008) or gazed at a light source under the influence of mydriatic agents to dilate pupils (Brainard, 2001). New findings of the present study were that dozing (stages 1 and 2) was significantly increased, and energy metabolism was significantly lower the following morning in blue light exposed subjects. This suggests that modulation of the circadian rhythm is affected by nocturnal blue light exposure and the effect continues in the following daytime even if the intervention was mild. |
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| Address | University of Tsukuba, Graduate School of Comprehensive Human Sciences, Japan | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1389-9457 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 349 | ||
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| Author | Kaniewska, P.; Alon, S.; Karako-Lampert, S.; Hoegh-Guldberg, O.; Levy, O. | ||||
| Title | Signaling cascades and the importance of moonlight in coral broadcast mass spawning | Type | Journal Article | ||
| Year | 2015 | Publication | eLife | Abbreviated Journal | |
| Volume | 4 | Issue |
Pages | e09991 | |
| Keywords | Animals; coral; chronobiology; reproductive strategies; reproductive synchronization; Great Barrier Reef; neurohormones; marine; oceans; invertebrates | ||||
| Abstract | Many reef-building corals participate in a mass-spawning event that occurs yearly on the Great Barrier Reef. This coral reproductive event is one of earth's most prominent examples of synchronised behavior, and coral reproductive success is vital to the persistence of coral reef ecosystems. Although several environmental cues have been implicated in the timing of mass spawning, the specific sensory cues that function together with endogenous clock mechanisms to ensure accurate timing of gamete release are largely unknown. Here, we show that moonlight is an important external stimulus for mass spawning synchrony and describe the potential mechanisms underlying the ability of corals to detect environmental triggers for the signaling cascades that ultimately result in gamete release. Our study increases the understanding of reproductive chronobiology in corals and strongly supports the hypothesis that coral gamete release is achieved by a complex array of potential neurohormones and light-sensing molecules. | ||||
| Address | Global Change Institute and ARC Centre of Excellence for Coral Reef Studies, The University of Queensland, St Lucia, Australia; oveh(at)uq.edu.au | ||||
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| Publisher | eLife | Place of Publication | Editor | ||
| Language | English | Summary Language | English | Original Title | |
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2050-084X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 1321 | ||
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| Author | Posudin, Y. | ||||
| Title | Measurement of Light Pollution | Type | Book Chapter | ||
| Year | 2014 | Publication | Methods of Measuring Environmental Parameters | Abbreviated Journal | |
| Volume | Chapter 33 | Issue |
Pages | ||
| Keywords | Bortle scale; digital photography; light pollution; portable spectrophotometer; sky quality meter; SQM | ||||
| Abstract | Digital photography is based on the conversion of light by sensitive matrix (array of electronic photodetectors) to capture the image which is then digitized and stored as a computer file for further processing and printing. The spectral sensitivity of the cameras is in good agreement with the spectrum of action of the photosensitive hormone melatonin. Digital photography can be used to quantify light pollution acting on the physiology of living organisms. The chapter discusses the principles of spectrophotometry. A portable spectrophotometer for the measurement of light pollution is proposed by Cinzano. It consists of a cooled CCD camera and a small spectrographic head which is equipped with a De Amici prism composed of two external crown prisms and an inner Flint prism. Sky quality meter (SQM) is a portable photometer for measuring sky brightness and for light pollution monitoring. This device collects the light from a wide solid angle. | ||||
| Address | Department of Physics, National University of Life and Environmental Sciences, Ukraine | ||||
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| Publisher | John Wiley & Sons, Inc. | Place of Publication | Editor | ||
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| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 359 | ||
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| Author | Verutes, G.M.; Huang, C.; Estrella, R.R.; Loyd, K. | ||||
| Title | Exploring scenarios of light pollution from coastal development reaching sea turtle nesting beaches near Cabo Pulmo, Mexico | Type | Journal Article | ||
| Year | 2014 | Publication | Global Ecology and Conservation | Abbreviated Journal | Global Ecology and Conservation |
| Volume | 2 | Issue |
Pages | 170-180 | |
| Keywords | Artificial light; Viewshed analysis; Sea turtle conservation; Coastal resort management; InVEST; sea turtle; reptiles; marine reptiles; vertebrates; Mexico; Baja California | ||||
| Abstract | New coastal development may offer economic benefits to resort builders and even local communities, but these projects can also impact local ecosystems, key wildlife, and the draw for tourists. We explore how light from Cabo Cortés, a proposed coastal development in Baja California Sur, Mexico, may alter natural light cues used by sea turtle hatchlings. We adapt a viewshed approach to model exterior light originating from the resort under plausible zoning scenarios. This spatially explicit information allows stakeholders to evaluate the likely impact of alternative development options. Our model suggests that direct light’s ability to reach sea turtle nesting beaches varies greatly by source location and height—with some plausible development scenarios leading to significantly less light pollution than others. Our light pollution maps can enhance decision-making, offering clear guidance on where to avoid elevated lamps or when to recommend lighting restrictions. Communities can use this information to participate in development planning to mitigate ecological, aesthetic and economic impacts from artificial lighting. Though tested in Mexico, our approach and free, open-source software can be applied in other places around the world to better understand and manage the threats of light pollution to sea turtles. | ||||
| Address | Natural Capital Project, Stanford University, 371 Serra Mall, Stanford, CA, 94305, USA | ||||
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| ISSN | 2351-9894 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | IDA @ john @ | Serial | 368 | ||
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