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Author Shimomura, M.; Yoshida, H.; Fujiuchi, N.; Ariizumi, T.; Ezura, H.; Fukuda, N.
Title Continuous blue lighting and elevated carbon dioxide concentration rapidly increase chlorogenic acid content in young lettuce plants Type Journal Article
Year (down) 2020 Publication Scientia Horticulturae Abbreviated Journal Scientia Horticulturae
Volume 272 Issue Pages 109550
Keywords Plants
Abstract Chlorogenic acid (CGA) is a strong antioxidant that potentially reduces oxidative damage in human cells. In this study, the effects of environmental factors such as photoperiod, light quality and intensity, and CO2 concentration on the growth and CGA content of lettuce (Lactuca sativa L.) were evaluated. CGA content in fresh lettuce increased under high light intensity treatments, doubling in concentration under 200 μmol m−2 s-1 compared to 100 μmol m−2 s-1. Elevated CO2 concentration also increased CGA content in fresh lettuce, quadrupling in concentration when grown at 1000 ppm compared to 400 ppm. Furthermore, there was a compound effect of light intensity and CO2 concentration whereby a light intensity level of 200 μmol m−2 s-1 and CO2 of 1000 ppm produced an even higher concentration of CGA, 199 mg per 100 g of fresh lettuce. Increased CGA concentration because of continuous lighting and elevated CO2 was observed under both fluorescent light and blue LED, but not under red LED treatment. Increased day length also induced higher CGA content in lettuce plants. These results show that continuous lighting, including blue spectrum and elevated CO2 concentration can cause higher CGA accumulation in lettuce plants. The observed increase in CGA content was induced only for 2 days after treatment was initiated. One possible interpretation of the data is that physiological stress caused by excess photosynthesis under continuous lighting results in higher CGA content to protect the plant body from high levels of reactive oxidative species. In addition, blue light and CO2 could be stimulus signals for inducing high CGA accumulation via metabolite changes.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0304-4238 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3090
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Author Touitou, Y.; Point, S.
Title Effects and mechanisms of action of light-emitting diodes on the human retina and internal clock Type Journal Article
Year (down) 2020 Publication Environmental Research Abbreviated Journal Environ Res
Volume 190 Issue Pages in press
Keywords Review; Human Health; Biological clock; Blue light; Electronic media; Endocrine disruptor; Environmental synchronizers; Light at night; Melatonin; Night work; Retinal phototoxicity; Shift work; Sleep disorder
Abstract White light-emitting diodes (LEDs) will likely become the most used lighting devices worldwide in the future because of their very low prices over the course of their long lifespans which can be up to several tens of thousands of hours. The expansion of LED use in both urban and domestic lighting has prompted questions regarding their possible health effects, because the light that they provide is potentially high in the harmful blue band (400-500nm) of the visible light spectrum. Research on the potential effects of LEDs and their blue band on human health has followed three main directions: 1) examining their retinal phototoxicity; 2) examining disruption of the internal clock, i.e., an out-of-sync clock, in shift workers and night workers, including the accompanying health issues, most concerningly an increased relative risk of cancer; and 3) examining risky, inappropriate late-night use of smartphones and consoles among children and adolescents. Here, we document the recognized or potential health issues associated with LED lighting together with their underlying mechanisms of action. There is so far no evidence that LED lighting is deleterious to human retina under normal use. However, exposure to artificial light at night is a new source of pollution because it affects the circadian clock. Blue-rich light, including cold white LEDs, should be considered a new endocrine disruptor, because it affects estrogen secretion and has unhealthful consequences in women, as demonstrated to occur via a complex mechanism.
Address Cooper Securite SAS, 63200, Riom, France
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 0013-9351 ISBN Medium
Area Expedition Conference
Notes PMID:32758719 Approved no
Call Number GFZ @ kyba @ Serial 3091
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Author Maksimainen, M.; Vaaja, M.T.; Kurkela, M.; Virtanen, J.-P.; Julin, A.; Jaalama, K.; Hyyppä, H.
Title Nighttime Mobile Laser Scanning and 3D Luminance Measurement: Verifying the Outcome of Roadside Tree Pruning with Mobile Measurement of the Road Environment Type Journal Article
Year (down) 2020 Publication ISPRS International Journal of Geo-Information Abbreviated Journal Ijgi
Volume 9 Issue 7 Pages 455
Keywords Lighting; Plants; Instrumentation
Abstract Roadside vegetation can affect the performance of installed road lighting. We demonstrate a workflow in which a car-mounted measurement system is used to assess the light-obstructing effect of roadside vegetation. The mobile mapping system (MMS) includes a panoramic camera system, laser scanner, inertial measurement unit, and satellite positioning system. The workflow and the measurement system were applied to a road section of Munkkiniemenranta, Helsinki, Finland, in 2015 and 2019. The relative luminance distribution on a road surface and the obstructing vegetation were measured before and after roadside vegetation pruning applying a luminance-calibrated mobile mapping system. The difference between the two measurements is presented, and the opportunities provided by the mobile 3D luminance measurement system are discussed.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2220-9964 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3092
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Author Torabi, M.J.
Title The Possible Potentials of Astrotourism in Caucasus Type Journal Article
Year (down) 2020 Publication Communications of the Byurakan Astrophysical Observatory Abbreviated Journal
Volume 67 Issue 1 Pages 127-132
Keywords Astrotourism
Abstract Astrotourism is not a new topic, but it is certainly a title that has been in the forefront of tourismand astronomy for less than two decades. For nearly half a century, observatories and sciencecenters have been opening their doors to the public on special occasions, such as Astronomy Day.However, for less than a decade, astrotourism has been the constant presence of tourists alongsideprofessional astronomers, especially on weekends. They have made it possible by following allthe principles. Until the early 1990s, one of the most important countries in the world to hostthe world's largest astronomical observatories was the Soviet Union. The Caucasus region in theformer Soviet Union hosted very important observatories due to its high altitudes, pure nature, andvery low amount of light pollution and, of course, the proper weather in warm seasons. Byurakanin Armenia, Abastumani in Georgia, Shamakhi in Azerbaijan, and BTA-6 in Russia are the fourmain collections left from that period. Fortunately, nearly two decades after the independenceof the countries in the region, the restoration and updating of these observatories have been onthe agenda. One of the helping arms to accelerate the revival of these observatories is to takeadvantage of the potential of astrotourism; especially with the location of these three countriesnear Iran, which has one of the largest astronomy enthusiast communities in the region.
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Notes Approved no
Call Number GFZ @ kyba @ Serial 3094
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Author Cereghetti, N.; Strepparava, D.; Bettini, A.; Ferrari, S.
Title Analysis of Light Pollution in Ticino region during the period 2011-2016 Type Journal Article
Year (down) 2020 Publication Sustainable Cities and Society Abbreviated Journal Sustainable Cities and Society
Volume 63 Issue Pages 102456
Keywords Skyglow
Abstract Since 2002, the Environmental Observatory of Southern Switzerland (OASI) has monitored a remarkable set of environmental parameters with the purpose of performing an enhanced observation of the regional environmental conditions. Since 2011, a campaign for the supervision of the artificial nighttime skyglow has been included in the OASI monitoring system exploiting the collaboration with DarkSky association. This network monitors the light pollution in several areas of Ticino, the southernmost Swiss Canton bordering Italy. It consists of multiple stations, which continuously measure the sky brightness. The University of Applied Sciences and Arts of Southern Switzerland, in collaboration with Politecnico di Milano, introduces the results of a study regarding the skyglow evolution during the period 2011-2016. The time-series of the OASI network were pre-processed to detect and discard data affected by natural perturbing events, such as moon and clouds presence and sun effect during twilights. In a second time, a distribution analysis of the data and an evaluation of the brightness trend during the considered period were performed. The results show that light pollution in Ticino is strictly influenced by the northern area of the nearby Italian Lombardy region and that during the surveyed years a decreasing of the pollution occurred.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2210-6707 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3095
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