Results 41 to 50 of about 38,871 (311)
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
A new LED-LED portable CO2 gas sensor based on an interchangeable membrane system for industrial applications [PDF]
, 2011 CO2 monitoring is important for many areas of high economic relevance, like environmental monitoring, control of biotechnological processes in bio-pharmaceutical industries, and the food industry, particularly controlled atmosphere storage rooms and ...
Vargas-Sansalvador, Isabel María Pérez de +15 more
core +1 more source
INFLUENCE OF LIGHT EMITTING DIODE (LED) ON MICROALGAE
Journal of Chemical Engineering and Industrial Biotechnology, 2020 There are 150,000 microalgae species. Scientists identified and classified 30,000 species. Only 10–15 species are utilised and studied for wastewater treatment, biogas upgrading, biomass production, and lipid content. LED can raise microalgae performance to the highest.
Sajjad Al-amshawee +1 more
openaire +2 more sources
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
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
Thin-film photonic crystal LEDs with enhanced directionality
, 2010 The use of photonic crystals for light extraction from light-emitting diodes (LEDs) gives the possibility to shape the farfield emission pattern. This is of particular interest for étendue-limited LED applications that require a more directional ...
Bergenek, Krister
core +1 more source
Enhanced light extraction by photonic quasi-crystals in GaN blue LEDs [PDF]
, 2009 The far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements reach a maximum of 62%, and
Shields, Philip A. +8 more
core +1 more source
FEBS Letters, EarlyView.Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara +3 more
wiley +1 more source
Molecular Oncology, EarlyView.We identify USP29 as the only DUB mirroring CA9 expression, a marker of hypoxia and HIF pathway activation associated with PCA aggressiveness. USP29 stabilizes HIF‐1α and HIF‐2α via a noncanonical mechanism that is independent of PHD/pVHL activity yet relies on proteasomal regulation, establishing USP29 as a previously unrecognized regulator of hypoxic
Amelie S Schober +16 more
wiley +1 more source