Results 31 to 40 of about 109,058 (278)
Retinal damage induced by commercial light emitting diodes (LEDs) [PDF]
Free Radical Biology and Medicine, 2015 Spectra of "white LEDs" are characterized by an intense emission in the blue region of the visible spectrum, absent in daylight spectra. This blue component and the high intensity of emission are the main sources of concern about the health risks of LEDs with respect to their toxicity to the eye and the retina. The aim of our study was to elucidate the
Jaadane, Imene +8 more
openaire +4 more sources
Applied Sciences, 2020 We investigated a light emitting diode (LED) lighting system applied to a water bamboo field during winter season at night, and the results indicated that this lighting system can prevent the stunting of water bamboo leaves and further assist its growth.
Vincent K. S. Hsiao +11 more
doaj +1 more source
Restorative Dentistry: Dental composite depth of cure with halogen and blue light emitting diode technology [PDF]
, 2009 Objectives To test the hypothesis that a blue light emitting diode (LED) light curing unit (LCU) can produce an equal dental composite depth of cure to a halogen LCU adjusted to give an irradiance of 300 mWcm–2 and to characterise the LCU's light outputs.
Ashworth, Stephen +2 more
core +1 more source
Scientific Reports, 2017 Coherence properties of different light sources and how they affect the image quality of holographic display are investigated. Temporal coherence is related to the intrinsic spectrum bandwidth of the light source, while spatial coherence can be affected ...
Yuanbo Deng, Daping Chu
doaj +1 more source
Micromachines, 2023 This study investigated a reflective transparent structure to improve the optical efficiency of 850 nm infrared light-emitting diodes (IR-LEDs), by effectively enhancing the number of extracted photons emitted from the active region.
Hyung-Joo Lee +3 more
doaj +1 more source
Vertically mounted InGaN-on-Sapphire light-emitting diodes [PDF]
, 2011 An InGaN/GaN light-emitting diode (LED) chip mounted in a vertical configuration (vmLED) is demonstrated, exhibiting significant enhancement to light extraction, compared with a LED mounted in a conventional planar geometry.
Choi, HW, Lai, PT, Ma, ZT, Zhu, L
core +1 more source
Light-emitting diode effects on combined decellularization of tracheae. A novel approach to obtain biological scaffolds [PDF]
Acta Cirúrgica Brasileira, 2014 PURPOSE: To obtain a decellularized tracheal scaffold associating traditional approaches with the novel light-emitting diode (LED) proposal.METHODS:This study was performed with New Zealand adult rabbits weighing 3.0 - 4.0 kg.
Thaiane Cristine Evaristo +8 more
doaj +1 more source
Acta Cirúrgica Brasileira, 2011 Purpose: To quantify keloid fibroblasts after irradiation with 470nm blue LED, in vitro. Methods: Fibroblasts from keloid and adjacent skin have been obtained from 6 patients. Cells have been cultivated and maintained in DMEM culture medium.
Silvilena Bonatti +6 more
doaj +1 more source
International Journal of Electronics and Communications System, 2021 With the assist of customized step wise combustion synthesis method Sr2Mg(BO3)2: Tb3+ phosphors were synthesize along with the luminescent proprieties, XRD, chromaticity coordinates with effect of emission intensity with related with the corresponding ...
Vishal R Panse +4 more
doaj +1 more source
Integrated dual-color InGaN light-emitting diode array through transfer printing [PDF]
, 2015 We demonstrate an integrated dual-color InGaN light-emitting diode (LED) array by transfer printing blue LED structures from their silicon growth substrate in between the pixels of a pre-processed green LED array on a sapphire ...
Dawson, M. D. +12 more
core +1 more source