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Simultaneous Measurement of Wind and Aerosol Backscattering in the Troposphere by High Spectral Resolution Lidar with Iodine Filter (2000)

Chen, Weibiao ; Kuze, Hiroaki ; Takeuchi, Nobuo

Springer

Optical review 7 (2000), S. 230-234

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ISSN: 1349-9432

Keywords: high spectral resolution lidar ; Doppler shift ; iodine vapor filter ; aerosol scattering ; Rayleigh scattering ; wind velocity

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We propose a high spectral resolution lidar system which is capable of measuring aerosol backscattering and line-of-sight wind velocity in the troposphere. An iodine vapor filter is used to separate the aerosol and Rayleigh scattering components as well as to discriminate the Doppler shift frequency. The performance of the lidar system is estimated with reasonable parameters. The error of horizontal wind velocity below an altitude of 6 km is less than 0.5 m/s, and accuracy of the aerosol backscattering coefficient is better than 40% below 10 km. This system is particularly suitable for the study of aerosol transportation in the troposphere.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s10043-000-0230-7

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Factors controlling electroosmotic flow in open-tubular capillaries in electrokinetic chromatography (1986)

Terabe, S. ; Utsumi, H. ; Otsuka, K. ; [et al.]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 9 (1986), S. 666-670

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ISSN: 0935-6304

Keywords: Electrokinetic chromatography ; Electroosmosis ; Electrophoresis ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Effects of pH, concentration of sodium dodecyl sulfate (SDS), additives, and coatings of polymers on the inner wall of fused silica tubing on electrokinetic migration were investigated with SDS solutions. The increase in SDS concentrations caused a substantial increase of the electrophoretic velocity of the SDS micelle but little affected the electroosmotic velocity veo under a constant applied voltage. No significant change in veo was observed either when the pH of the solution was varied from 5.5 to 9 or when additives such as hydroxypropyl cellulose were employed. Compared with an uncoated tube, electroosmosis became stronger in a fused silica tube coated with methyl silicone but weaker in one coated with polyethylene glycol 20M.

Additional Material: 3 Ill.