toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author Hou, Z.-S.; Wen, H.-S.; Li, J.-F.; He, F.; Li, Y.; Qi, X.; Zhao, J.; Zhang, K.-Q.; Tao, Y.-X. url  doi
openurl 
  Title Effects of photoperiod and light Spectrum on growth performance, digestive enzymes, hepatic biochemistry and peripheral hormones in spotted sea bass (Lateolabrax maculatus) Type Journal Article
  Year (down) 2019 Publication Aquaculture Abbreviated Journal Aquaculture  
  Volume 507 Issue Pages 419-427  
  Keywords Animals; fishes; spotted sea bass; Lateolabrax maculatus; Photoperiod  
  Abstract Growth performance, digestive and metabolic activities, and contents of peripheral hormones of spotted sea bass (Lateolabrax maculatus) juveniles were evaluated under natural light and three different light spectrums (white, blue and red) in combination with three photoperiods (light: dark cycle, 12: 12-h, 18: 6-h and 24: 0-h). Bass in 18-h blue light environment displayed the best growth performance and digestive enzyme activities, while red light environment significantly impeded growth and digestive enzyme activities. Altered contents of melatonin, cortisol, thyroid hormones (T3 and T4), and testosterone (T) were observed in bass reared in red light, suggesting that red light could disturb endocrine homeostasis associated with biological rhythm (melatonin), stress coping (melatonin and cortisol), growth and development (T3 and T4), and aggressive behavior or hyperactivity (T3, T4 and T). Impaired growth performance might be due to energy used to cope with stress. We concluded that the red spectrum environment was stressful to spotted bass and the selection of appropriate light conditions (such as 18-h blue light) might lead to a beneficial outcome for spotted sea bass culture.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0044-8486 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2329  
Permanent link to this record
 

 
Author Kocifaj, M.; Solano-Lamphar, H.A.; Videen, G. url  doi
openurl 
  Title Night-sky radiometry can revolutionize the characterization of light-pollution sources globally Type Journal Article
  Year (down) 2019 Publication Proceedings of the National Academy of Sciences of the United States of America Abbreviated Journal Proc Natl Acad Sci U S A  
  Volume 116 Issue 16 Pages 7712-7717  
  Keywords Skyglow  
  Abstract The city emission function (CEF), describing the angular emission from an entire city as a light source, is one of the key elements in night-sky radiance models. The CEF describes the rate at which skyglow depends on distance and is indispensable in any prediction of light-pollution propagation into nocturnal environments. Nevertheless, the CEF remains virtually unexplored because appropriate retrieval tools have been unavailable until very recently. A CEF has now been obtained from ground-based night-sky observations and establishes an experiment successfully conducted in the field to retrieve the angular emission function for an urban area. The field campaign was conducted near the city of Los Mochis, Mexico, which is well isolated from other cities and thus dominates all light emissions in its vicinity. The experiment has proven that radiometry of a night sky can provide information on the light output pattern of a distant city and allows for systematic, full-area, and cost-efficient CEF monitoring worldwide. A database of CEFs could initiate a completely new phase in light-pollution research, with significant economy and advanced accuracy of night-sky brightness predictions. The experiment and its interpretation represent unique progress in the field and contribute to our fundamental understanding of the mechanism by which direct and reflected uplight interact while forming the CEF.  
  Address Battlefield Environment Division, Army Research Laboratory, Adelphi, MD 20783  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0027-8424 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30936314; PMCID:PMC6475415 Approved no  
  Call Number GFZ @ kyba @ Serial 2330  
Permanent link to this record
 

 
Author Lee, H.-S.; Lee, E.; Moon, J.-H.; Kim, Y.J.; Lee, H.-J. url  doi
openurl 
  Title Circadian disruption and increase of oxidative stress in male and female volunteers after bright light exposure before bed time Type Journal Article
  Year (down) 2019 Publication Molecular & Cellular Toxicology Abbreviated Journal Mol. Cell. Toxicol.  
  Volume 15 Issue 2 Pages 221-229  
  Keywords Human Health  
  Abstract Backgrounds

Circadian rhythms are patterns of behaviour, physiology, and metabolism that occur within a period of approximately 24 h. The higher risk of breast and prostate cancers among shift workers, as well as the general population, are reported to be associated with circadian rhythm disruption caused by exposure to light at night. We focused on the effects of bright light before bed comparing effects between men and women.

Methods

Male and female healthy volunteers aged 20–30 were exposed to 4 hours of bright light before bed for 3 and 4 days.

Results

We analyzed the shift of circadian rhythms of subjects based on cortisol secretion patterns in response to short periods of bright-light exposure at bedtime. We also found an increase of oxidative stress including MDA, 8-OHdG, and total antioxidants in both male and female volunteers.

Conclusion

These results suggest that bright light exposure before sleep, often encounter in modern daily life, has a considerable influence on the human body. The chronic effects of light exposure before bed time such as the carcinogenic effects caused by circadian disruption and oxidative stress need further investigation.
 
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1738-642X ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2331  
Permanent link to this record
 

 
Author Pu, G.; Zen, D.; Mo, L.; He, W.; Zhou, L.; Huang, K.; Liao, J.; Qiu, S.; Chai, S. url  doi
openurl 
  Title Does artificial light at night change the impact of silver nanoparticles on microbial decomposers and leaf litter decomposition in streams? Type Journal Article
  Year (down) 2019 Publication Environmental Science: Nano Abbreviated Journal Environ. Sci.: Nano  
  Volume 6 Issue Pages 1728-1739  
  Keywords Ecology; silver nanoparticles; aquatic ecosystems  
  Abstract The toxic effects of silver nanoparticles (AgNP) to aquatic species and ecosystem processes have been the focus of increasing research in ecology, but their effects under different environmental stressors, such as the ongoing anthropogenic artificial light at night (ALAN) which can cause a series of ecological effects and will potentially interact with other stressors, remain poorly understood. Here, we aimed to assess the combined effects of AgNP and ALAN on the activities and community structure of fungi and bacteria associated to plant litter in a stream. The results showed that ALAN not only led to changes in the average hydrodynamic diameter, ζ-potential and dissolved concentration of AgNP but also inhibited the enzyme activities of leucine-aminopeptidase (LAP), polyphenol oxidase (PPO) and peroxidase (PER) associated to microbes involved in litter decomposition. The negative effect of AgNP on the decomposition of Pterocarya stenoptera leaf litter was alleviated by ALAN owing to the reduction of Ag+ concentration in the microcosm and lignin content in the leaf litter in the A-AgNP treatments, the enhancement of β-glucosidase (β-G) activities and the increase of microbial biomass. The effect of ALAN alone or combined with AgNP or AgNO3 on the taxonomic composition of fungi was much greater than that on bacteria. Linear discriminant analysis effect size (LEfSe) demonstrated that each treatment had its own fungal and bacterial indicator taxa, from the phylum to genus levels, indicating that the microbial communities associated with litter decomposition can change their constituent taxa to cope with different stressors. These results reveal that ALAN can decrease the toxicity of AgNP and highlight the importance of considering ALAN during the assessment of the risk posed by nanoparticles to freshwater biota and ecosystem processes.  
  Address Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin, China; pukouchy(at)hotmail.com  
  Corporate Author Thesis  
  Publisher Royal Astronomical Society of Chemistry Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2051-8153 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2332  
Permanent link to this record
 

 
Author Benedetto, M.M.; Contin, M.A. url  doi
openurl 
  Title Oxidative Stress in Retinal Degeneration Promoted by Constant LED Light Type Journal Article
  Year (down) 2019 Publication Frontiers in Cellular Neuroscience Abbreviated Journal Front. Cell. Neurosci.  
  Volume 13 Issue Pages  
  Keywords Vision; Human Health  
  Abstract Light pollution by artificial light, might accelerate retinal diseases and circadian asynchrony. The excess of light exposure is a growing problem in societies, so studies on the consequences of long-term exposure to low levels of light are needed to determine the effects on vision. The possibility to understand the molecular mechanisms of light damage will contribute to the knowledge about visual disorders related to defects in the phototransduction. Several animal models have been used to study retinal degeneration (RD) by light; however, some important aspects remain to be established. Previously, we demonstrated that cool white treatment of 200 lux light-emitting diode (LED) induces retinal transformation with rods and cones cell death and significant changes in opsin expression in the inner nuclear layer (INL) and ganglion cell layer (GCL). Therefore, to further develop describing the molecular pathways of RD, we have examined here the oxidative stress and the fatty acid composition in rat retinas maintained at constant light. We demonstrated the existence of oxidative reactions after 5 days in outer nuclear layer (ONL), corresponding to classical photoreceptors; catalase (CAT) enzyme activity did not show significant differences in all times studied and the fatty acid study showed that docosahexaenoic acid decreased after 4 days. Remarkably, the docosahexaenoic acid diminution showed a correlation with the rise in stearic acid indicating a possible association between them. We assumed that the reduction in docosahexaenoic acid may be affected by the oxidative stress in photoreceptors outer segment which in turn affects the stearic acid composition with consequences in the membrane properties. All these miss-regulation affects the photoreceptor survival through unknown mechanisms involved. We consider that oxidative stress might be one of the pathways implicated in RD promoted by light.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1662-5102 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 2333  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: