Results 41 to 50 of about 158,208 (301)

Comparative analysis of LED priming effects on two medicinal lemon balm genotypes one and three weeks post-drought stress

BMC Plant Biology
Background Light is essential for producing high-quality plants. The advancement of light-emitting diode technology has unlocked new opportunities for growing plants in controlled settings.
Tayebeh Ahmadi, Leila Shabani, Mohammad Reza Sabzalian, Sahar Hassannejad   +3 more
doaj   +1 more source

Doping concentration effect on performance of single QW double-heterostructure InGaN/AlGaN light emitting diode

EPJ Web of Conferences, 2017
Light emitting diode (LED) employed a numerous applications such as displaying information, communication, sensing, illumination and lighting. In this paper, InGaN/AlGaN based on one quantum well (1QW) light emitting diode (LED) is modeled and studied ...
Abdul Halim N. Syafira, Wahid M.Halim A., Ahmad Hambali N. Azura M., Rashid Shanise, Shahimin Mukhzeer M.   +4 more
doaj   +1 more source

Co-planar spin-polarized light emitting diode

, 2005
Studies of spin manipulation in semiconductors has benefited from the possibility to grow these materials in high quality on top of optically active III-V systems.
Jungwirth, T., Kaestner, B., Sinova, Jairo, Wunderlich, J.   +3 more
core   +1 more source

β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations

Advanced Biology, Volume 9, Issue 3, March 2025.
Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio, B. Spedicato, G. Corallo, A. Inguscio, M. Greco, D. Musarò, D. Vergara, A. F. Muro, G. De Sabbata, L. R. Soria, N. Brunetti Pierri, M. Maffia   +11 more
wiley   +1 more source

Comparison of Color Light-Emitting Diode Corneal Topographer and Dual Rotating Scheimpflug–Placido Topographer

Journal of Ophthalmology, 2018
Purpose. To compare measurements of anterior and posterior keratometric values, using a color light-emitting diode corneal topographer and a dual rotating Scheimpflug–Placido topographer. Methods.
Jae Hyuck Lee, Yong Woo Lee, Jong Soo Lee, Michael C. Knorz, Gerd U. Auffarth, Chul Young Choi   +5 more
doaj   +1 more source

Temperature compensation of light-emitting diodes [PDF]

, 1972
Circuit which includes a thermistor-resistor combination to compensate for temperature fluctuations by supplying input voltage to light-emitting diode, maintains constant light output.
Burrous, C. N., Deboo, G. J.
core   +1 more source

Absolute Calibration of a Large-diameter Light Source [PDF]

, 2013
A method of absolute calibration for large aperture optical systems is presented, using the example of the Pierre Auger Observatory fluorescence detectors.
Brack, J. T., Cope, R., Dorofeev, A., Gookin, B., Harton, J. L., Petrov, Y., Rovero, A. C.   +6 more
core   +2 more sources

Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter, Felix Drechsler, Till M. J. Stadtmüller, Cameliu Himcinschi, Christos G. Aneziris, Jens Kortus   +5 more
wiley   +1 more source

Blue light-emitting diode based on ZnO

, 2005
A near-band-edge bluish electroluminescence (EL) band centered at around 440 nm was observed from ZnO p-i-n homojunction diodes through a semi-transparent electrode deposited on the p-type ZnO top layer.
Chichibu, Shigefusa F., Kawasaki, Masashi, Kubota, Masashi, Ohno, Hideo, Ohtani, Keita, Ohtomo, Akira, Onuma, Takeyoshi, Tsukazaki, Atsushi   +7 more
core   +1 more source

Concept of a GaN-LED-based positioning system using structured illumination [PDF]

, 2015
Accurate self-orientation within a space can be achieved using only a simple photodetector and a remote Gallium Nitride micro-light-emitting diode array, emitting a time series of varying spatial illumination patterns onto the ...
Dawson, Martin D., Gu, Erdan, Herrnsdorf, Johannes, Strain, Michael J.   +3 more
core   +1 more source