Results 241 to 250 of about 2,483,144 (287)

Laser-Induced Fluorescence

Annual Review of Physical Chemistry, 1977
area of science. The laser's unique capacity to deliver large amounts of energy within extraordinarily small ranges of spectral width and directionality has made possible many kinds of mea­ surement that would othe rwise have been quite impossible, Wavelength tunability has proved to be an especially important advance that has not only revolutioniz ed ...
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Laser induced fluorescence emission (LIFE)

Analytical Biochemistry, 1971
Abstract The authors used an ultraviolet laser as an excitation source to obtain fluorescence spectra from 4 μl of solution, or 0.1 μl equivalent of powder. A sensitivity of 0.1 part per trillion quinine sulfate was obtained. The system was sufficiently sensitive to detect Raman shifts.
R, Jankow, O, Kilham, W, Renken, R, Bender   +3 more
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Laser NO_2 fluorescence measurements in flames

Applied Optics, 1978
NO(2) fluorescence measurements have been made in a CH(4)/O(2)/N(2) flame at atmospheric pressure using a pulsed tunable dye laser. The results indicate that it should be possible to achieve sub-ppm sensitivities for NO(2) in flames using currently available lasers.
R H, Barnes, J F, Kircher
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Laser induced fluorescence spectroscopy of NC3O

The Journal of Chemical Physics, 2008
Laser induced fluorescence spectra of the NC3O radical in a supersonic jet have been observed. The radical was produced in a pulsed electric discharge of HC3N and O2 diluted to 0.3% with Ar. A total of 17 vibronic bands with a radiative lifetime of ∼30ns have been observed in a region from 27000to27500cm−1. The observed vibronic bands are classified as
Takashi, Yoshikawa, Yoshihiro, Sumiyoshi, Hideyuki, Takada, Kennosuke, Hoshina, Yasuki, Endo   +4 more
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Laser-Induced Fluorescence of Biological Molecules

1976
A study is made of the laser-induced fluorescence properties of the complex formed by Quinacrine Mustard bound to Deoxyribonucleic Acid (DNA). Specific information is obtained on the binding mechanisms and on the base-pair sequences of the DNA. The relevance of these measurements in several fields from chemical physics to biology and medecine is ...
A. ANDREONI, LONGONI, ANTONIO FRANCESCO, C. A. SACCHI, O. SVELTO, G. BOTTIROLI   +4 more
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Laser-induced multiphoton fluorescence of hemoglobin

Journal of Photochemistry and Photobiology B: Biology, 1988
Hemoglobin (Hb) and other samples were irradiated by the 1064 nm nanosecond pulses of an Nd:YAG laser. At room temperature, we observed two red fluorescence bands, which resulted from the absorption of two 1064 nm photons in Hb, and measured the fluorescence emission spectra in the red spectral region for Hb and hematoporphyrin derivative.
J R, Zhang, Y W, Xu, Y M, Deng, C K, Wu, S P, Jiang, S H, Lian   +5 more
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Laser-induced fluorescence spectroscopy of NC3S

The Journal of Chemical Physics, 2004
In a discharged supersonic jet of acetonitrile and carbon disulfide, we have for the first time observed an electronic transition of the NC3S radical using laser-induced fluorescence (LIF) spectroscopy. A progression originating from the C–S stretching mode of the upper electronic state appears in the excitation spectrum.
Masakazu, Nakajima, Yu, Yoneda, Yoshihiro, Sumiyoshi, Yasuki, Endo   +3 more
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Effect of velocity on microdroplet fluorescence quantified by laser-induced fluorescence

Lab Chip, 2014
Using a split laser, we analysed how the velocity of in-flow microdroplets modifies the droplet fluorescence signal when interrogated by LIF.
Benjamín, Vazquez, Naser, Qureshi, Laura, Oropeza-Ramos, Luis F, Olguin   +3 more
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Laser-Induced Fluorescence Spectroscopy in Flames

Progress in Energy and Combustion Science, 1980
The use of laser induced fluorescence spectroscopy (LIF) is described for making measurements in the combustion environment. Some background in molecular structure, spectroscopic concepts, thermodynamics and combustion chemistry is first presented. This is followed by application of the rate equations to model and demonstrate the response of atomic and
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Using a Diode Laser for Laser-Induced Fluorescence

Journal of Chemical Education, 2001
The construction and use of a laser fluorimeter from a 635-nm red diode laser and an amplified photodiode detector are described. The low cost and monochromatic nature of diode lasers make them attractive as excitation sources for educational fluorescence experiments. Use of this type of fluorimeter is demonstrated by measuring fluorescence signals for
Yang Tran, J. E. Whitten
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