scholarly journals Light intensity modulation by coccoliths of Emiliania huxleyi as a micro-photo-regulator

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuri Mizukawa ◽  
Yuito Miyashita ◽  
Manami Satoh ◽  
Yoshihiro Shiraiwa ◽  
Masakazu Iwasaka
Keyword(s):  
Light Intensity ◽  
Emiliania Huxleyi ◽  
Intensity Modulation

scholarly journals Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by <i>Emiliania huxleyi</i>

2017 ◽  
Vol 14 (24) ◽  
pp. 5693-5704 ◽  
Author(s):  
Gabriella M. Weiss ◽  
Eva Y. Pfannerstill ◽  
Stefan Schouten ◽  
Jaap S. Sinninghe Damsté ◽  
Marcel T. J. van der Meer
Keyword(s):  
Light Intensity ◽  
Environmental Conditions ◽  
Hydrogen Isotope ◽  
Isotope Fractionation ◽  
Emiliania Huxleyi ◽  
High Light Intensity ◽  
High Light ◽  
Light Conditions ◽  
Low Light ◽  
Long Chain

Abstract. Over the last decade, hydrogen isotopes of long-chain alkenones have been shown to be a promising proxy for reconstructing paleo sea surface salinity due to a strong hydrogen isotope fractionation response to salinity across different environmental conditions. However, to date, the decoupling of the effects of alkalinity and salinity, parameters that co-vary in the surface ocean, on hydrogen isotope fractionation of alkenones has not been assessed. Furthermore, as the alkenone-producing haptophyte, Emiliania huxleyi, is known to grow in large blooms under high light intensities, the effect of salinity on hydrogen isotope fractionation under these high irradiances is important to constrain before using δDC37 to reconstruct paleosalinity. Batch cultures of the marine haptophyte E. huxleyi strain CCMP 1516 were grown to investigate the hydrogen isotope fractionation response to salinity at high light intensity and independently assess the effects of salinity and alkalinity under low-light conditions. Our results suggest that alkalinity does not significantly influence hydrogen isotope fractionation of alkenones, but salinity does have a strong effect. Additionally, no significant difference was observed between the fractionation responses to salinity recorded in alkenones grown under both high- and low-light conditions. Comparison with previous studies suggests that the fractionation response to salinity in culture is similar under different environmental conditions, strengthening the use of hydrogen isotope fractionation as a paleosalinity proxy.

Light intensity modulation based on guided-to-radiation mode coupling in heterostructure waveguides

1984 ◽  
Vol 23 (1) ◽  
pp. 118 ◽  
Author(s):  
Hidetoshi Onodera ◽  
Ikuo Awai ◽  
Masamitsu Nakajima ◽  
Junichi Ikenoue
Keyword(s):  
Light Intensity ◽  
Mode Coupling ◽  
Intensity Modulation ◽  
Radiation Mode

Light intensity modulation in phototherapy

Laser Physics ◽  
2015 ◽  
Vol 25 (4) ◽  
pp. 045602 ◽  
Author(s):  
P A Lukyanovich ◽  
B A Zon ◽  
A A Kunin ◽  
S N Pankova
Keyword(s):  
Light Intensity ◽  
Intensity Modulation

Analysis of light intensity modulation by red blood cells motion in capillaries

2017 ◽  
Author(s):  
Andrey V. Potemkin ◽  
Alexei A. Kamshilin ◽  
Mikhail V. Volkov ◽  
Nikita B. Margaryantz ◽  
Maxim A. Volynsky ◽  
...  
Keyword(s):  
Light Intensity ◽  
Red Blood Cells ◽  
Blood Cells ◽  
Intensity Modulation
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