scholarly journals Effect of Blue-Light PPFD Percentage in Red and Blue LED Low-Light Irradiation during Storage on the Contents of Chlorophyll and Rubisco in Grafted Tomato Plug Seedlings

2006 ◽  
Vol 44 (4) ◽  
pp. 309-314 ◽  
Author(s):  
Keiko OHASHI-KANEKO ◽  
Kazuhiro FUJIWARA ◽  
Yoshikatsu KIMURA ◽  
Kenji KURATA
Keyword(s):  
Blue Light ◽  
Light Irradiation ◽  
Low Light ◽  
Blue Led

scholarly journals Effect on the Quality of Grafted Tomato Plug Seedlings of Blue-light PPFD Percentage during Red and Blue LEDs Low Light Irradiation Storage

2003 ◽  
Vol 41 (4) ◽  
pp. 361-368 ◽  
Author(s):  
Kazuhiro FUJIWARA ◽  
Yoshikatsu KIMURA ◽  
Kenji KURATA
Keyword(s):  
Blue Light ◽  
Light Irradiation ◽  
Low Light

scholarly journals Application of an Automatic Control System of Photosynthetic Photon Flux Density for LED-Low Light Irradiation Storage of Green Plants

2005 ◽  
Vol 15 (4) ◽  
pp. 781-786 ◽  
Author(s):  
Kazuhiro Fujiwara ◽  
Toshinari Sawada ◽  
Yoshikatsu Kimura ◽  
Kenji Kurata
Keyword(s):  
Flux Density ◽  
Blue Light ◽  
Red Light ◽  
Dry Weight ◽  
Photosynthetic Photon Flux Density ◽  
Light Irradiation ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Photosynthetic Photon Flux ◽  
Low Light

A light-emitting diode (LED)-low light irradiation (LLI) storage system was developed for suppressing the change in dry weight and maintaining the quality of green plants during long-term storage. In this system, the carbon dioxide (CO2) exchange rate was maintained at zero by automatically adjusting the photosynthetic photon flux density (PPFD) with a proportional-integralderivative (PID) controller. The voltage supplied to the LEDs was controlled by the difference between the inflow (400 μmol·mol-1) and outflow CO2 concentrations in the storage case. Grafted tomato (Lycopersicon esculentum; scion = `House Momotaro'; rootstock = `Anchor T') plug seedlings were stored at 10 °C for 35 days under four different LLI conditions as a system operating test: fixed red light irradiation at 2 μmol·m-2·s-1, PID-controlled red light irradiation with no blue light, and PID-controlled red light irradiation with blue light at 0.2 or 1.0 μmol·m-2·s-1. The results showed that the automatic PPFD control during LED-LLI helped suppress changes in dry weight during storage as expected. Furthermore, it was found that addition of a low percentage of blue light improved the morphological appearance of the seedlings and reduced the PPFD required to suppress the change in dry weight.

scholarly journals Air stable and highly efficient Bi3+-doped Cs2SnCl6 for blue light-emitting diodes

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26415-26420
Author(s):  
Yue Yao ◽  
Si-Wei Zhang ◽  
Zijian Liu ◽  
Chun-Yun Wang ◽  
Ping Liu ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Coordinates ◽  
Blue Led ◽  
Highly Efficient ◽  
Photoluminescence Quantum Yield ◽  
Long Life

A Bi3+-doped Cs2SnCl6 exhibits photoluminescence at around 456 nm and a photoluminescence quantum yield of 31%. The blue LED based on the Bi3+-doped Cs2SnCl6 phosphor exhibits a long life of 120 hours and a CIE color coordinates of (0.14, 0.11).

scholarly journals Correction to “Photocatalyst-Free Singlet Oxygen-Induced Oxygenation: A Strategy for the Preparation of 5-Cyano-2-pyridones Driven by Blue-Light Irradiation”

2020 ◽  
Vol 85 (14) ◽  
pp. 9446-9446
Author(s):  
Mengmeng Zhang ◽  
Hanyang Lan ◽  
Nan Li ◽  
Qidi Zhong ◽  
Hao Zhu ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Blue Light ◽  
Light Irradiation

Photoinduced Iron-Catalyzed Atom Transfer Radical Polymerization with ppm Levels of Iron Catalyst under Blue Light Irradiation

2017 ◽  
Vol 50 (20) ◽  
pp. 7967-7977 ◽  
Author(s):  
Sajjad Dadashi-Silab ◽  
Xiangcheng Pan ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Blue Light ◽  
Iron Catalyst ◽  
Light Irradiation ◽  
Atom Transfer

Evaluation of Photobiogoverning Role of Blue Light Irradiation on Viral Replication

2021 ◽  
Author(s):  
Phil‐Sun Oh ◽  
Kyung Won Kang ◽  
Seung Rok Ryu ◽  
SeokTae Lim ◽  
Myung‐Hee Sohn ◽  
...  
Keyword(s):  
Viral Replication ◽  
Blue Light ◽  
Light Irradiation

Effect of blue LED light irradiation on anthocyanin synthesis in the skin of detached apples

2021 ◽  
pp. 235-242
Author(s):  
C. Honda ◽  
H. Iwanami ◽  
K. Yoshimura
Keyword(s):  
Light Irradiation ◽  
Anthocyanin Synthesis ◽  
Blue Led ◽  
Led Light

scholarly journals Effects of blue-light irradiation during dental treatment

2018 ◽  
Vol 54 (4) ◽  
pp. 160-168 ◽  
Author(s):  
Fumihiko Yoshino ◽  
Ayaka Yoshida
Keyword(s):  
Blue Light ◽  
Dental Treatment ◽  
Light Irradiation

scholarly journals Photobiomodulation of Human Fibroblasts and Keratinocytes with Blue Light: Implications in Wound Healing

2020 ◽  
Author(s):  
Francesca Rossi ◽  
Giada Magni ◽  
Francesca Tatini ◽  
Martina Banchelli ◽  
Federica Cherchi ◽  
...  
Keyword(s):  
Wound Healing ◽  
Blue Light ◽  
Chronic Wounds ◽  
Human Fibroblasts ◽  
Healing Process ◽  
Research Area ◽  
Wound Management ◽  
Blue Led ◽  
Led Light ◽  
New Research

In recent years, photobiomodulation (PBM) has been recognized as a physical therapy in wound management. Despite several published research papers, the mechanism underlying photobiomodulation is still not completely understood. The investigation about application of blue light to improve wound healing is a relatively new research area. Tests in selected patients evidenced a stimulation of the healing process in superficial and chronic wounds treated with a blue LED light emitting at 420 nm; a study in animal model pointed out a faster healing process in superficial wound, with an important role of fibroblasts and myofibroblasts. Here we present a study aiming at evidencing the effects of blue light on the proliferation and metabolism in fibroblasts and keratinocytes. Different light doses were used to treat the cells, evidencing inhibitory and stimulatory effects. Electrophysiology was used to investigate the effects on membrane currents, while Raman spectroscopy revealed the mitochondrial Cytochrome C (Cyt C) oxidase dependence on blue light irradiation. In conclusion, we observed that the blue LED light can be used to modulate the activity of human fibroblasts, and the effects in wound healing are particularly evident when studying the fibroblasts and keratinocytes co-cultures.

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