scholarly journals Spectral photosynthesis, quantum yield and blue-green light enhancement of productivity rates in the diatom Chaetoceros gracile and the prymnesiophyte Emiliania huxleyi

1990 ◽  
Vol 64 ◽  
pp. 175-186 ◽  
Author(s):  
O Schofield ◽  
RR Bidigare ◽  
BB Prézelin
Keyword(s):  
Quantum Yield ◽  
Green Light ◽  
Emiliania Huxleyi ◽  
Light Enhancement

scholarly journals High Emission Quantum Yield Tb3+ -Activated Organic-Inorganic Hybrids for UV-Down-Shifting Green Light-Emitting Diodes

2020 ◽  
Vol 2020 (18) ◽  
pp. 1736-1742
Author(s):  
Sandra F. H. Correia ◽  
Ricardo L. Fernandes ◽  
Lianshe Fu ◽  
Mariela M. Nolasco ◽  
Luís D. Carlos ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Light Emitting Diodes ◽  
Green Light ◽  
Light Emitting ◽  
High Emission ◽  
Emission Quantum Yield

scholarly journals Green Light Improves Photosystem Stoichiometry in Cucumber Seedlings (Cucumis sativus) Compared to Monochromatic Red Light

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 824
Author(s):  
Nicholas B. Claypool ◽  
J. Heinrich Lieth
Keyword(s):  
Leaf Area ◽  
Cucumis Sativus ◽  
Blue Light ◽  
Quantum Efficiency ◽  
Photosynthetic Capacity ◽  
Red Light ◽  
Green Light ◽  
Photosynthetic Performance ◽  
Cucumber Seedlings ◽  
Light Enhancement

It has been shown that monochromatic red and blue light influence photosynthesis and morphology in cucumber. It is less clear how green light impacts photosynthetic performance or morphology, either alone or in concert with other wavelengths. In this study, cucumber (Cucumis sativus) was grown under monochromatic blue, green, and red light, dichromatic blue–green, red–blue, and red–green light, as well as light containing red, green, and blue wavelengths, with or without supplemental far-red light. Photosynthetic data collected under treatment spectra at light-limiting conditions showed that both red and green light enhance photosynthesis. However, photosynthetic data collected with a 90% red, 10% blue, 1000 µmol photons m−2 s−1, saturating light show significantly lower photosynthesis in the green, red, and red–green treatments, indicating a blue light enhancement due to photosystem stoichiometric differences. The red–green and green light treatments show improved photosynthetic capacity relative to red light, indicating partial remediation by green light. Despite a lower quantum efficiency and the lowest ambient photosynthesis levels, the monochromatic blue treatment produced among the tallest, most massive plants with the greatest leaf area and thickest stems.

Nitrogen-improved photosynthesis quantum yield is driven by increased thylakoid density, enhancing green light absorption

Plant Science ◽  
2019 ◽  
Vol 278 ◽  
pp. 1-11 ◽  
Author(s):  
Thaise Moriwaki ◽  
Renan Falcioni ◽  
Francisco André Ossamu Tanaka ◽  
Kátia Aparecida Kern Cardoso ◽  
L.A. Souza ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Light Absorption ◽  
Green Light

scholarly journals Synthesis of 2-(1-Benzofuran-2-yl)-4-(1,3-benzoxazol-2-yl/ 1,3-benzothiazol-2-yl) Quinolines as Blue Green Fluorescent Probes

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yadav D. Bodke ◽  
Sheelavanth Shankerrao ◽  
Hosanagara N. Harishkumar
Keyword(s):  
Quantum Yield ◽  
Fluorescent Probes ◽  
Polyphosphoric Acid ◽  
Bathochromic Shift ◽  
Stokes Shift ◽  
Green Light ◽  
High Quantum Yield ◽  
Fluorescent Properties ◽  
One Step ◽  
Green Fluorescent

A series of novel 2-(1-benzofuran-2-yl)-4-(1,3 benzoxazol-2-yl/1,3-benzothiazol-2-yl) quinoline derivatives4(a–d)were synthesized in one step by the reaction of 2-(1-benzofuran-2-yl) quinoline-4-carboxylic acids3(a-b)with o-aminophenol and o-amino thiophenol, respectively, using polyphosphoric acid (PPA) as a cyclizing agent. The fluorescent properties of newly synthesized compounds were investigated in three different organic solvents like chloroform (CHCl3), tetrahydrofuran (THF), and dimethyl sulfoxide (DMSO). The photophysical constants such as quantum yield and stokes shift were determined. From the results of fluorescence study, it is evident that all synthesized compounds are fluorescent in solution. Compound4aemitted green light (490.4 nm, 518.2 nm, and 522.4 nm) with high quantum yield in all the three solvents, while compounds4b, 4c, and4demitted green light (512 nm, 499 nm, 510 nm) only in polar solvent DMSO. All fluorescent probes exhibited a bathochromic shift on increase in polarity of the solvent.

DICHLORINE HEXOXIDE

1938 ◽  
Vol 16b (11) ◽  
pp. 382-389 ◽  
Author(s):  
M. H. Kalina ◽  
J. W. T. Spinks
Keyword(s):  
Molecular Weight ◽  
Carbon Tetrachloride ◽  
Quantum Yield ◽  
Physical Properties ◽  
Extinction Coefficient ◽  
Quantitative Estimation ◽  
Wave Length ◽  
Colorimetric Method ◽  
Green Light ◽  
Carbon Tetrachloride Solution

Some chemical and physical properties of dichlorine hexoxide are described and attention is drawn to its dangerous property of exploding violently on contact with organic substances.The extinction coefficient of solutions of dichlorine hexoxide in carbon tetrachloride solution for a wave-length of 5460 Å has been measured and found to be 2.4, which is very much less than that of liquid dichlorine hexoxide for the same wave-length. A colorimetric method is described for the quantitative estimation of dichlorine hexoxide in solutions. The molecular weight of dichlorine hexoxide in carbon tetrachloride solution has been redetermined, and it confirms the formula Cl2O6.Solutions of dichlorine hexoxide in carbon tetrachloride are decomposed photochemically by green light. Gaseous chlorine trioxide (ClO3) is decomposed photochemically by λ3650. Its decomposition is photosensitized by chlorine and bromine, the quantum yield in the chlorine sensitized reaction being about 1.

THE BROMINE-SENSITIZED DECOMPOSITION OF CHLORINE MONOXIDE IN GREEN LIGHT

1937 ◽  
Vol 15b (3) ◽  
pp. 113-123 ◽  
Author(s):  
A. G. Brown ◽  
J. W. T. Spinks
Keyword(s):  
Quantum Yield ◽  
Chlorine Dioxide ◽  
Wave Length ◽  
Green Light ◽  
Dark Reaction ◽  
Chlorine Monoxide

Chlorine monoxide undergoes a bromine-sensitized decomposition in light of wave-length 5460 A. The reaction involves short chains and is accompanied by an appreciable dark reaction. The quantum yield is 4.3 at 19 °C. A decrease in pressure occurring near the end of the reaction has been shown to be a photochemical effect, and it is due probably to the bromine-sensitized decomposition of chlorine dioxide formed during the combined light and dark reactions.A mechanism similar to that described by Finkelnburg, Schumacher and Stieger for the unsensitized reaction appears to account for most of the observations.

Effect of short-term light- and UV-stress on DMSP, DMS, and DMSP lyase activity in Emiliania huxleyi

2015 ◽  
Vol 74 (2) ◽  
pp. 173-185 ◽  
Author(s):  
LJ Darroch ◽  
M Lavoie ◽  
M Levasseur ◽  
I Laurion ◽  
WG Sunda ◽  
...  
Keyword(s):  
Emiliania Huxleyi ◽  
Short Term ◽  
Lyase Activity ◽  
Uv Stress

Size-dependent emission of a dipole coupled to a metal nanoparticle

MRS Advances ◽  
2020 ◽  
Vol 5 (62) ◽  
pp. 3315-3325
Author(s):  
Viktoriia Savchuk ◽  
Arthur R. Knize ◽  
Pavlo Pinchuk ◽  
Anatoliy O. Pinchuk
Keyword(s):  
Numerical Analysis ◽  
Quantum Yield ◽  
Electric Dipole ◽  
Incident Radiation ◽  
Metal Nanoparticle ◽  
Plasmonic Nanoparticle ◽  
Size Dependent ◽  
Emission Enhancement ◽  
Electric Dipoles

AbstractWe present a systematic numerical analysis of the quantum yield of an electric dipole coupled to a plasmonic nanoparticle. We observe that the yield is highly dependent on the distance between the electric dipole and the nanoparticle, the size and permittivity of the nanoparticle, and the wavelength of the incident radiation. Our results indicate that enhancement of the quantum yield is only possible for electric dipoles coupled to a nanoparticle with a radius of 20 nm or larger. As the size of the nanoparticle is increased, emission enhancement occurs at wavelengths dependent on the coupling distance.

Use of reflected green light for specific identification of islets in vitro after collagenase isolation

Diabetes ◽  
1979 ◽  
Vol 28 (6) ◽  
pp. 612-613 ◽  
Author(s):  
E. H. Finke ◽  
P. E. Lacy ◽  
J. Ono
Keyword(s):  
Green Light ◽  
Specific Identification
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