Helium-neon laser intracavity photothermal beam deflection spectrometry

1986 ◽  
Vol 58 (8) ◽  
pp. 1714-1716 ◽  
Author(s):  
Chieu D. Tran
Keyword(s):  
Beam Deflection ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Photothermal Beam Deflection Spectrometry ◽  
Helium Neon

Helium Neon Laser Intracavity Photothermal Beam Deflection Densitometer

1987 ◽  
Vol 41 (3) ◽  
pp. 512-516 ◽  
Author(s):  
Chieu D. Tran
Keyword(s):  
Detection Limit ◽  
Beam Deflection ◽  
Ion Pump ◽  
Intensity Modulated ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Photophysical Processes ◽  
Helium Neon ◽  
Argon Ion ◽  
Insight Into

A novel, compact He-Ne laser intracavity photothermal beam deflection densitometer has been developed. In this instrument, a TLC plate is placed inside the cavity of the He-Ne laser, which serves as a probe. An argon-ion pump-laser overlaps with the probe beam at the chro-matogram spot. The apparatus is 34 times more sensitive than the corresponding extracavity instrument. The technique not only was able to detect bilirubin, bilirubin ditauride, and half-bilirubin on a developed HPTLC but also provided insight into the photophysical processes of those pigments. The detection limit for bilirubin, excited by the 476-nm laser line, at 20 mW intensity, modulated at 7 Hz, is 2.5 ng.

STABILITY OF SYMMETRIC BILATERAL DC DISCHARGE IN A RING HELIUM-NEON LASER

2019 ◽  
Vol 69 ◽  
pp. 193-201
Author(s):  
M.V. Chirkin ◽  
◽  
S.V. Ustinov ◽  
V.Yu. Mishin ◽  
◽  
...  
Keyword(s):  
Neon Laser ◽  
Dc Discharge ◽  
Helium Neon Laser ◽  
Helium Neon

Low-Energy Helium-Neon Laser Irradiation Increases the Motility of Cultured Human Keratinocytes

1990 ◽  
Vol 94 (6) ◽  
pp. 822-826 ◽  
Author(s):  
Ann F. Haas ◽  
R. Rivkah Isseroff ◽  
Ronald G. Wheeland ◽  
Pamela A. Rood ◽  
Phillip J. Graves
Keyword(s):  
Laser Irradiation ◽  
Human Keratinocytes ◽  
Low Energy ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon

Raman spectra and lattice dynamics of the α phases of nitrogen and carbon monoxide crystals

1970 ◽  
Vol 48 (19) ◽  
pp. 2265-2271 ◽  
Author(s):  
A. Anderson ◽  
T. S. Sun ◽  
M. C. A. Donkersloot
Keyword(s):  
Carbon Monoxide ◽  
Raman Spectra ◽  
Lattice Dynamics ◽  
Jones Potential ◽  
Lennard Jones ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
First Time ◽  
Helium Neon ◽  
Argon Ion

The Raman spectra of polycrystalline α-nitrogen and α-carbon monoxide have been recorded at 18 °K, using argon–ion and helium–neon laser excitation. Previously undetected peaks at 60 cm−1 for N2 and 90.5 cm−1 for CO are assigned as librational modes, and splitting of the stretching mode in nitrogen is observed for the first time. Spectral features in both the intramolecular and lattice regions are assigned in accordance with accepted crystal structures, and their frequencies compared with those obtained from calculations based on a spherical Lennard–Jones potential and quadrupole–quadrupole interactions between the molecules.

Helium-neon laser irradiation induces effects on cytokine production at the protein and the mRNA level

1993 ◽  
Vol 2 (2) ◽  
pp. 75-83 ◽  
Author(s):  
Jens Oliver Funk ◽  
Andrea Kruse ◽  
Petra Neustock ◽  
Holger Kirchner
Keyword(s):  
Laser Irradiation ◽  
Cytokine Production ◽  
Mrna Level ◽  
Neon Laser ◽  
Helium Neon Laser ◽  
Helium Neon
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