scholarly journals Phototropins Function in High-Intensity Blue Light-Induced Hypocotyl Phototropism in Arabidopsis by Altering Cytosolic Calcium

2013 ◽  
Vol 162 (3) ◽  
pp. 1539-1551 ◽  
Author(s):  
X. Zhao ◽  
Y.-L. Wang ◽  
X.-R. Qiao ◽  
J. Wang ◽  
L.-D. Wang ◽  
...  
Keyword(s):  
Blue Light ◽  
High Intensity ◽  
Cytosolic Calcium

Exposure of 3T3 mouse Fibroblasts and Collagen to High Intensity Blue Light

2009 ◽  
pp. 1352-1355 ◽  
Author(s):  
S. Smith ◽  
M. Maclean ◽  
S. J. MacGregor ◽  
J. G. Anderson ◽  
M. H. Grant
Keyword(s):  
Blue Light ◽  
High Intensity ◽  
Mouse Fibroblasts

scholarly journals Anthocyanin Production Using Rough Bluegrass Treated with High-Intensity Light

HortScience ◽  
2016 ◽  
Vol 51 (9) ◽  
pp. 1111-1120 ◽  
Author(s):  
Dominic P. Petrella ◽  
James D. Metzger ◽  
Joshua J. Blakeslee ◽  
Edward J. Nangle ◽  
David S. Gardner
Keyword(s):  
Blue Light ◽  
High Intensity ◽  
Red Light ◽  
Leaf Tissue ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Content ◽  
Poa Trivialis ◽  
Total Light ◽  
Anthocyanin Production ◽  
High Intensity Light

Anthocyanins are plant pigments that are in demand for medicinal and industrial uses. However, anthocyanin production is limited due to the harvest potential of the species currently used as anthocyanin sources. Rough bluegrass (Poa trivialis L.) is a perennial turfgrass known for accumulating anthocyanins, and may have the potential to serve as a source of anthocyanins through artificial light treatments. The objectives of this research were to determine optimal light conditions that favor anthocyanin synthesis in rough bluegrass, and to determine the suitability of rough bluegrass as a source of anthocyanins. When exposed to high-intensity white light, rough bluegrass increased anthocyanin content by 100-fold on average, and anthocyanin contents greater than 0.2% of dry tissue weight were observed in some samples. Blue light, at intensities between 150 and 250 μmol·m−2·s−1, was the only wavelength that increased anthocyanin content. However, when red light was applied with blue light at 30% or 50% of the total light intensity, anthocyanin content was increased compared with blue light alone. Further experiments demonstrated that these results may be potentially due to a combination of photosynthetic and photoreceptor-mediated regulation. Rough bluegrass is an attractive anthocyanin production system, since leaf tissue can be harvested while preserving meristematic tissues that allow new leaves to rapidly grow; thereby allowing multiple harvests in a single growing season and greater anthocyanin yields.

Acne phototherapy with a high-intensity, enhanced, narrow-band, blue light source: an open study and in vitro investigation

2002 ◽  
Vol 30 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Akira Kawada ◽  
Yoshinori Aragane ◽  
Hiroko Kameyama ◽  
Yoshiko Sangen ◽  
Tadashi Tezuka
Keyword(s):  
Light Source ◽  
Blue Light ◽  
High Intensity ◽  
Open Study ◽  
Narrow Band ◽  
In Vitro Investigation

Acne phototherapy using UV-free high-intensity narrow-band blue light: a three-center clinical study

2001 ◽  
Author(s):  
Alan R. Shalita ◽  
Yoram Harth ◽  
Monica Elman ◽  
Michael Slatkine ◽  
Gerry Talpalariu ◽  
...  
Keyword(s):  
Clinical Study ◽  
Blue Light ◽  
High Intensity ◽  
Narrow Band

scholarly journals New Incoherent Autofluorescence/Fluorescence System for Early Detection of Lung Cancer

1999 ◽  
Vol 5 (2) ◽  
pp. 71-75 ◽  
Author(s):  
Martin Leonhard
Keyword(s):  
Lung Cancer ◽  
Early Detection ◽  
Blue Light ◽  
White Light ◽  
High Intensity ◽  
Aminolevulinic Acid ◽  
Broad Band ◽  
Light Illumination ◽  
Auto Fluorescence ◽  
White Light Illumination

A new autofluorescence (AF) system for bronchoscopy that operates as compact as a conventional white light bronchoscopy system is described. The system is also capable of white light illumination and excitation of aminolevulinic acid (ALA) induced fluorescence. Changing between white light and (auto-) fluorescence mode is easy and always possible. Broad band excitation with blue light (AF: 380–460 nm; ALA 380–440 nm) delivers high intensity illumination at the distal end of the bronchoscope (AF typically 50 mW). A special optical observation technique makes the AF directly visible to the eye instead of indirect techniques used in other AF systems. A compact (160 g)and sensitive (typically 0.2 lux) camera can be used for documentation.

scholarly journals A dynein-associated photoreceptor protein prevents ciliary acclimation to blue light

2021 ◽  
Vol 7 (9) ◽  
pp. eabf3621
Author(s):  
Osamu Kutomi ◽  
Ryosuke Yamamoto ◽  
Keiko Hirose ◽  
Katsutoshi Mizuno ◽  
Yuuhei Nakagiri ◽  
...  
Keyword(s):  
Blue Light ◽  
Green Alga ◽  
High Intensity ◽  
Motor Domain ◽  
Negative Phototaxis ◽  
Strong Light ◽  
Ciliary Motility ◽  
Unicellular Green Alga ◽  
Responsive Regulation

Light-responsive regulation of ciliary motility is known to be conducted through modulation of dyneins, but the mechanism is not fully understood. Here, we report a novel subunit of the two-headed f/I1 inner arm dynein, named DYBLUP, in animal spermatozoa and a unicellular green alga. This subunit contains a BLUF (sensors of blue light using FAD) domain that appears to directly modulate dynein activity in response to light. DYBLUP (dynein-associated BLUF protein) mediates the connection between the f/I1 motor domain and the tether complex that links the motor to the doublet microtubule.Chlamydomonaslacking the DYBLUP ortholog shows both positive and negative phototaxis but becomes acclimated and attracted to high-intensity blue light. These results suggest a mechanism to avoid toxic strong light via direct photoregulation of dyneins.

Sign in / Sign up

Export Citation Format

Share Document