scholarly journals EFFECT OF LIGHT-EMITTING DIODE (LED) LIGHT COLOR ON TESTICULAR GROWTH, CIRCULATING TESTOSTERONE CONCENTRATION AND SPERM QUALITY IN DANDARAWI ROOSTERS

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0
Keyword(s):  
Sperm Quality ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Testosterone Concentration ◽  
Led Light ◽  
Testicular Growth ◽  
Light Color ◽  
Effect Of Light

Effects of light source spectrum and background colour on the perception of paintings

2019 ◽  
Vol 52 (1) ◽  
pp. 36-63
Author(s):  
L Bellia ◽  
F Fragliasso ◽  
E Stefanizzi
Keyword(s):  
Light Source ◽  
Light Emitting Diode ◽  
Source Spectrum ◽  
Light Emitting ◽  
Colour Temperature ◽  
Test Room ◽  
Led Light ◽  
Lighting Conditions ◽  
Set Up ◽  
Effect Of Light

This paper presents an experiment on the effect of light on the perception of paintings. The experiment was performed in a test-room where a typical museum exhibition set-up was simulated. Two different paintings were shown to 44 participants, under different light scenes obtained by using tuneable LED (Light Emitting Diode) wallwashers. To set the light scenes, the following parameters were modified: correlated colour temperature of the lighting, illuminance on the painting and the colour of the background wall. Participants answered a questionnaire to assess the perception of the paintings’ colours, the lighting conditions and the pleasantness of the exhibition set-up. The results demonstrated that illuminance is the parameter mainly affecting perception, for both paintings. However, correlated colour temperature and wall colour, as well as the combination of the three different considered parameters, can more or less influence perception depending on the chromatic composition of the painting.

scholarly journals Effects of LED Light Color and Intensity on Feather Pecking and Fear Responses of Layer Breeders in Natural Mating Colony Cages

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 814 ◽  
Author(s):  
Haipeng Shi ◽  
Baoming Li ◽  
Qin Tong ◽  
Weichao Zheng ◽  
Dan Zeng ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Low Light ◽  
Light Emitting ◽  
Led Light ◽  
Feather Pecking ◽  
Physiological Indicators ◽  
Light Intensities ◽  
Yellow Orange ◽  
Natural Mating ◽  
Light Color

Natural mating colony cages for layer breeders have become commonplace for layer breeders in China. However, feather pecking (FP) and cannibalism are prominent in this system. The objective of this study was to investigate the effects of four light-emitting diode (LED) light colors (white: WL, red: RL, yellow-orange: YO, blue-green: BG) with two light intensities for each color, on FP, plumage condition, cannibalism, fear, and stress. A total of 32 identical cages were used for the eight treatments (four replicates for each treatment). For both light intensities, hens in RL had a lowest frequency of severe FP, whereas hens in WL had the highest frequency of severe FP. Hens in RL and BG had better plumage conditions than in WL and YO. Compared with RL and BG treatments, hens treated with WL and YO had a significantly longer tonic immobility (TI) duration. Hens treated with RL had a higher concentration of 5-hydroxytryptamine (5-HT), a lower concentration of corticosterone (CORT), and a lower heterophil to lymphocyte ratio than WL and YO. Furthermore, RL could significantly reduce mortality from cannibalism. Overall, hens treated with RL and low light intensity showed a lower frequency of severe FP, less damaged plumage, were less fearful, had lower physiological indicators of stress, and had reduced mortality from cannibalism. Transforming the light color to red or dimming the light could be regarded as an effective method to reduce the risk of FP and alleviate the fear responses of layer breeders.

scholarly journals Design of a Secondary Freeform Lens of UV LED Mosquito-Trapping Lamp for Enhancing Trapping Efficiency

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 335 ◽  
Author(s):  
Wei-Hsiung Tseng ◽  
Diana Juan ◽  
Wei-Cheng Hsiao ◽  
Cheng-Han Chan ◽  
Hsin-Yi Ma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Intensity Distribution ◽  
Light Emitting Diode ◽  
Trapping Efficiency ◽  
Axially Symmetric ◽  
Light Intensity Distribution ◽  
Light Emitting ◽  
Led Light ◽  
Uv Led ◽  
Freeform Lens

In this study, our proposed ultraviolet light-emitting diode (UV LED) mosquito-trapping lamp is designed to control diseases brought by insects such as mosquitoes. In order to enable the device to efficiently catch mosquitoes in a wider area, a secondary freeform lens (SFL) is designed for UV LED. The lens is mounted on a 3 W UV LED light bar as a mosquito-trapping lamp of the new UV LED light bar module to achieve axially symmetric light intensity distribution. The special SFL is used to enhance the trapping capabilities of the mosquito-trapping lamp. The results show that when the secondary freeform surface lens is applied to the experimental outdoor UV LED mosquito-trapping lamp, the trapping range can be expanded to 100π·m2 and the captured mosquitoes increased by about 300%.

scholarly journals Effect of Light Emitting Diode and Ozone on the Growth of White Radish Sprouts

2008 ◽  
Vol 92 (5) ◽  
pp. 262-265 ◽  
Author(s):  
Shoukichi Kikugawa ◽  
Takahiro Morimitsu ◽  
Masaharu Yokoyama ◽  
Tomoki Kawamura ◽  
Shinichi Mitsumoto
Keyword(s):  
Light Emitting Diode ◽  
Light Emitting ◽  
Radish Sprouts ◽  
White Radish ◽  
Effect Of Light

scholarly journals Effect of Light-Emitting Diode (LED) Wavelengths on Growth of Saccharomyces cerevisiae

2021 ◽  
Vol 50 (3) ◽  
pp. 301-306
Author(s):  
Xiaotong Xu ◽  
Ji-Eun Lee ◽  
So-Mi Jeong ◽  
Woo-Sin Kang ◽  
Si-Hyeong Ryu ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Effect Of Light
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