Infrared excited resonance Raman spectra of lobster shell pigments in situ

1981 ◽  
Vol 11 (5) ◽  
pp. 326-328 ◽  
Author(s):  
W. H. Nelson ◽  
P. R. Carey
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Resonance Raman Spectra ◽  
Excited Resonance

The Resonance Raman Microprobe Detection of Single Bacterial Cells from a Chromobacterial Mixture

1987 ◽  
Vol 41 (2) ◽  
pp. 241-244 ◽  
Author(s):  
R. A. Dalterio ◽  
M. Baek ◽  
W. H. Nelson ◽  
D. Britt ◽  
J. F. Sperry ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Visible Region ◽  
Argon Laser ◽  
Bacterial Cells ◽  
Raman Microprobe ◽  
Resonance Raman Spectra ◽  
Bacterial Mixtures ◽  
Television Image ◽  
Excited Resonance

High-quality resonance Raman spectra in the visible region can be obtained from very small aggregates of chromobacteria, and very useful spectra can be obtained from individual cells. Individual cells in bacterial mixtures have been clearly identified by argon-laser-excited resonance Raman spectra taken with a commercially available Spex Micramate. Organisms present in the vicinity of the laser beam and in the beam itself can be observed and counted with ease by means of a television image obtained via a vidicon tube attached to a microscope. The method appears capable of identification at the species level.

scholarly journals Resonance Raman Spectra for the In Situ Identification of Bacteria Strains and Their Inactivation Mechanism

2021 ◽  
pp. 000370282199283
Author(s):  
Dinesh Dhankhar ◽  
Anushka Nagpal ◽  
Runze Li ◽  
Jie Chen ◽  
Thomas C. Cesario ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Raman Spectra ◽  
Resonance Raman ◽  
Bacterial Strains ◽  
Short Period ◽  
Intensity Changes ◽  
Inactivation Mechanism ◽  
Identification Of Bacteria ◽  
Resonance Raman Spectra

The resonance Raman spectra of bacterial carotenoids have been employed to identify bacterial strains and their intensity changes as a function of ultraviolet (UV) radiation dose have been used to differentiate between live and dead bacteria. In addition, the resonance-enhanced Raman spectra enabled us to detect bacteria in water at much lower concentrations (∼108 cells/mL) than normally detected spectroscopically. A handheld spectrometer capable of recording resonance Raman spectra in situ was designed, constructed, and was used to record the spectra. In addition to bacteria, the method presented in this paper may also be used to identify fungi, viruses, and plants, in situ, and detect infections within a very short period of time.

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