Color Index

2009 ◽  
pp. 245-264
Keyword(s):  
Color Index

Early Cretaceous Climate Changes Recorded in Magnetic Susceptibility and Color Index Variations of the Lower Liupanshan Group, Central China

2016 ◽  
Vol 90 (3) ◽  
pp. 1011-1023 ◽  
Author(s):  
DAI Shuang ◽  
ZHU Qiang ◽  
HUANG Yongbo ◽  
DA SILVA A. Christine ◽  
ZHAO Jie ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Early Cretaceous ◽  
Color Index ◽  
Climate Changes ◽  
Central China

scholarly journals Decolorization of Color Index Acid Orange 20 buffer solution using horseradish peroxidase immobilized on modified PAN-beads

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 18976-18986 ◽  
Author(s):  
Zhu Yincan ◽  
Liu Yan ◽  
Guo Xueyong ◽  
Wu Qiao ◽  
Xu Xiaoping
Keyword(s):  
Aqueous Solution ◽  
Horseradish Peroxidase ◽  
Color Index ◽  
Buffer Solution ◽  
Acid Orange

In the present work, horseradish peroxidase (HRP) is utilized to be immobilized onto polyacrylonitrile based beads (PAN-beads) for decolorization of Color Index (C. I.) Acid Orange 20 (AO20) in aqueous solution.

Polar  Stratospheric Clouds detection at Belgrano II Antarctic station from DOAS measurements

2021 ◽  
Author(s):  
Laura Gómez Martín ◽  
Daniel Toledo ◽  
Margarita Yela ◽  
Cristina Prados-Román ◽  
José Antonio Adame ◽  
...  
Keyword(s):  
Radiative Transfer ◽  
Color Index ◽  
Radiative Transfer Model ◽  
Optical Absorption Spectroscopy ◽  
Transfer Model ◽  
Meteorological Model ◽  
Weather Forecasts ◽  
Stratospheric Temperature ◽  
Stratospheric Clouds

<p><span>Ground-based zenith DOAS (Differential Optical Absorption Spectroscopy) measurements have been used to detect and estimate the altitude of PSCs over Belgrano II Antarctic station during the polar sunrise seasons of 2018 and 2019. The method used in this work studies the evolution of the color index (CI) during twilights. The CI has been defined here as the ratio of the recorded signal at 520 and 420 nm. In the presence of PSCs, the CI shows a maximum at a given solar zenith angle (SZA). The value of such SZA depends on the altitude of the PSC. By using a spherical Monte Carlo radiative transfer model (RTM), the method has been validated and a function relating the SZA of the CI maximum and the PSC altitude has been calculated. Model simulations also show that PSCs can be detected and their altitude can be estimated even in presence of optically thin tropospheric clouds or aerosols. Our results are in good agreement with the stratospheric temperature evolution obtained through the ERA5 data reanalysis from the global meteorological model ECMWF (European Centre for Medium Range Weather Forecasts) and the PSCs observations from CALIPSO (Cloud-Aerosol-Lidar and Infrared Pathfinder Satellite Observations).</span></p><p><span>The methodology used in this work could also be applied to foreseen and/or historical measurements obtained with ground-based spectrometers such e. g. the DOAS instruments dedicated to trace gas observation in Arctic and Antarctic sites. This would also allow to investigate the presence and long-term evolution of PSCs.</span></p><p><span><strong>Keywords: </strong>Polar stratospheric clouds; color index; radiative transfer model; visible spectroscopy.</span></p>

Color Index

2014 ◽  
pp. 1-1
Author(s):  
Daniel Rouan
Keyword(s):  
Color Index

Color Index

2015 ◽  
pp. 498-498
Author(s):  
Daniel Rouan
Keyword(s):  
Color Index
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