scholarly journals Hybrid Plasmonic and Pyroelectric Harvesting of Light Fluctuations

2018 ◽  
Vol 6 (11) ◽  
pp. 1701051 ◽  
Author(s):  
Mina Shiran Chaharsoughi ◽  
Daniel Tordera ◽  
Andrea Grimoldi ◽  
Isak Engquist ◽  
Magnus Berggren ◽  
...  
Keyword(s):  
Light Fluctuations

Acoustic Emission, Electroluminescence Intensity Surface Distribution and Light Fluctuations Correlation in GaAsP∕GaP and InGaN∕GaN structures

2009 ◽  
Author(s):  
Vitaliy P. Veleschuk ◽  
Olexander I. Vlasenko ◽  
Oleg V. Lyashenko ◽  
Maxim P. Kysselyuk ◽  
Massimo Macucci ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Surface Distribution ◽  
Light Fluctuations ◽  
Electroluminescence Intensity

scholarly journals Light fluctuations are key in modulating plankton trophic dynamics and their impact on primary production

2020 ◽  
Vol 5 (5) ◽  
pp. 346-353
Author(s):  
Françoise Morison ◽  
Gayantonia Franzè ◽  
Elizabeth Harvey ◽  
Susanne Menden‐Deuer
Keyword(s):  
Primary Production ◽  
Trophic Dynamics ◽  
Light Fluctuations

scholarly journals Photosynthesis Regulation in Response to Fluctuating Light in the Secondary Endosymbiont Alga Nannochloropsis gaditana

2019 ◽  
Vol 61 (1) ◽  
pp. 41-52 ◽  
Author(s):  
Alessandra Bellan ◽  
Francesca Bucci ◽  
Giorgio Perin ◽  
Alessandro Alboresi ◽  
Tomas Morosinotto
Keyword(s):  
Electron Transport ◽  
Electron Flow ◽  
Incident Light ◽  
Photosynthetic Apparatus ◽  
Photosynthetic Electron Transport ◽  
Thermal Dissipation ◽  
Photochemical Quenching ◽  
Nannochloropsis Gaditana ◽  
Fluctuating Light ◽  
Light Fluctuations

Abstract In nature, photosynthetic organisms are exposed to highly dynamic environmental conditions where the excitation energy and electron flow in the photosynthetic apparatus need to be continuously modulated. Fluctuations in incident light are particularly challenging because they drive oversaturation of photosynthesis with consequent oxidative stress and photoinhibition. Plants and algae have evolved several mechanisms to modulate their photosynthetic machinery to cope with light dynamics, such as thermal dissipation of excited chlorophyll states (non-photochemical quenching, NPQ) and regulation of electron transport. The regulatory mechanisms involved in the response to light dynamics have adapted during evolution, and exploring biodiversity is a valuable strategy for expanding our understanding of their biological roles. In this work, we investigated the response to fluctuating light in Nannochloropsis gaditana, a eukaryotic microalga of the phylum Heterokonta originating from a secondary endosymbiotic event. Nannochloropsis gaditana is negatively affected by light fluctuations, leading to large reductions in growth and photosynthetic electron transport. Exposure to light fluctuations specifically damages photosystem I, likely because of the ineffective regulation of electron transport in this species. The role of NPQ, also assessed using a mutant strain specifically depleted of this response, was instead found to be minor, especially in responding to the fastest light fluctuations.

scholarly journals Optical Variability of Twenty-Two Quasi-Stellar Objects

1972 ◽  
Vol 44 ◽  
pp. 171-178 ◽  
Author(s):  
R. J. Angione ◽  
H. J. Smith
Keyword(s):  
Large Amplitude ◽  
Small Amplitude ◽  
Secular Trends ◽  
Apparent Magnitude ◽  
Optical Variability ◽  
Stellar Objects ◽  
Light Fluctuations ◽  
Quasi Stellar Objects ◽  
One Year

Light fluctuations have been found in all 22 QSOs studied by measurement of plates from the Harvard collection, which cover the last eighty years. The conclusions of this study are: (i) There appear to be at least three general classes of variation: (a) erratic, small-amplitude variations, (b) erratic, large-amplitude variations, and (c) slow quasi-periodic variations, e.g. as in 3C 273; (ii) No significant differences were detected between the rates of rise and decline of luminosity; (iii) Definite secular trends over at least 50 years were found in 5 QSOs; (iv) No simple clearcut periods greater than one year have been found; (v) There may be a trend of decreasing amplitude of fluctuations in apparent magnitude with increasing luminosity.

scholarly journals Minimum-Light Phenomena in Nova-like Variables

1971 ◽  
Vol 15 ◽  
pp. 275-278
Author(s):  
George S. Mumford
Keyword(s):  
Small Amplitude ◽  
Weak Correlation ◽  
Minimum Light ◽  
Light Fluctuations ◽  
The Mean

AbstractSome characteristics of the small-amplitude, quasi-periodic light fluctuations common to novalike variables are described. There appears to be a weak correlation for the majority of the objects between the dispersion about the mean magnitude and the interval between outbursts such that systems with infrequent outbursts exhibit the largest dispersions.

Theory of photoelectric detection of light fluctuations

1964 ◽  
Vol 84 (3) ◽  
pp. 435-444 ◽  
Author(s):  
L Mandel ◽  
E C G Sudarshan ◽  
E Wolf
Keyword(s):  
Photoelectric Detection ◽  
Light Fluctuations

scholarly journals A dynamic model for wave-induced light fluctuations in a kelp forest

1993 ◽  
Vol 38 (2) ◽  
pp. 396-407 ◽  
Author(s):  
Stephen R. Wing ◽  
James J. Leichter ◽  
Mark W. Denny
Keyword(s):  
Dynamic Model ◽  
Kelp Forest ◽  
Light Fluctuations ◽  
Wave Induced
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