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Author  |
Cathey, H. M., & Campbell, L. E. |
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Security lighting and its impact on the landscape. |
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1975 |
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Journal Of Arboriculture |
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1 |
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181–187 |
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Plants |
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LoNNe @ kagoburian @ |
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653 |
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Author |
Chang, C., Chang, K., & Fu, W. |
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Title |
Testing of Various Monochromatic LED Lights Used in Supplemental Irradiation of Lettuce in Modern urban Rooftop Polytunnels |
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2019 |
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Applied Engineering in Agriculture |
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Plants |
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Urban farming could provide both vegetable growers and urban dwellers in general with more direct access to various fresh vegetables. Nevertheless, certain challenging problems associated with urban farming, including a lack of cultivation space and the effects of urban heat islands, must still be solved. Relatedly, a grower must, in some cases, also know how to utilize various forms of technology, such as lighting systems, as well as factors such as water availability. In this study, an original rooftop polytunnel design for lettuce (Lactuca sativa cv. Lollo Rosso) cultivation equipped with a hydroponic system and light emitting diodes (LEDs) is proposed. Various monochromatic lights were also tested for their effects on different quality parameters of lettuce. Specifically, supplemental red (655 nm), blue (445 nm), green (520 nm), and ultraviolet (380 nm) LED lights were used at night to apply photon fluxes of 150, 150, 150, and 20 μmol．m-2．s-1, respectively. The resulting effects of these different colored LEDs on the pigment concentration and growth response of the lettuce grown inside the roof polytunnel were then investigated. The experiment was then repeated several times with different environmental parameters in order to compare the effects of the different light wavelengths under higher temperatures and higher natural irradiation conditions.The results indicated that supplemental red or blue light at night could be strategically employed to maintain low nitrate levels and enhance the nutritional value and growth of lettuce grown in roof polytunnels. |
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IDA @ intern @ |
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2349 |
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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. |
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Title |
The cryptochromes: blue light photoreceptors in plants and animals |
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Journal Article |
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2011 |
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Annual Review of Plant Biology |
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Annu Rev Plant Biol |
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62 |
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335-364 |
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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 |
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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. |
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Department of Genetics, Erasmus University Medical Center, 3000 CA Rotterdam, The Netherlands. i.chaves@erasmusmc.nl |
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1543-5008 |
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PMID:21526969 |
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IDA @ john @ |
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341 |
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Author |
Chen, C. L.; Su, Y. H.; Liu, C.J.; Lee, Y.C. |
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Title |
Effect of Night Illumination on Growth and Yield of Soybean |
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2009 |
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Journal of Taiwan Agricultural Research |
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J. of Taiwan Agricultural Res. |
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Plants; soybeans; Taiwan |
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To evaluate the potential of soybean as a crop for bio-fuel in Taiwan, field experiments were conducted in 2006 across the island, using an Australian variety ‘Leichardt’. This study was one of the field experiments at Hemei Township, Changhua County. Soybean was seeded by hand-spreading in the fall of 2006 and harvested in 2007. Results showed that seeding of soybean by hand-spreading affected uniformity of seed germination and caused high variations in yield in this field. Seed yield of soybean reached 770 kg ha-1 under good pest management and disease control. The study also showed that night illumination is an important factor affecting growth and yield of soybean. Plants growing near the roadside (within 10–20 m) were exposed to the night light, resulting in prolonged vegetative growth and delayed blossom period for about 1 to 4 weeks. Therefore, such plants suffered from poor pod filling due to low temperature stress at reproduction stage and delayed the harvest period for about 6 weeks. Nevertheless, seed yield of soybean plants exposed to the night illumination reached 1000 kg ha-1, which was slightly higher than soybean plants without exposuring to the night illumination. |
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chiling(at)tari.gov.tw |
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Taiwan Agricultural Research Institute |
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Chinese |
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IDA @ john @ |
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1395 |
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Author |
Clark, N.A. |
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Title |
The Rate of Reproduction of Lemna Major as a Function of Intensity and Duration of Light |
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1924 |
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The Journal of Physical Chemistry |
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J. Phys. Chem. |
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29 |
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8 |
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935-941 |
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0092-7325 |
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GFZ @ kyba @ |
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2374 |
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