&lt;title&gt;Advances in fiber optic Raman instrumentation&lt;/title&gt;

Davis, Kevin L.; Tedesco, James M.; Shaver, Jeremy M.

doi:10.1117/12.345396

Cited by 5 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mestari et al [23] have found for their direct mode DILOR-HORIBA instrument that the calibration shifted minus 0.2-0.3 cm -1 per degree of heating. Similar values have been given in other references [19] . From Fig.…”

Section: Temperature Effectssupporting

confidence: 89%

See 1 more Smart Citation

Wavenumber Calibration of CCD Detector Raman Spectrometers Controlled by a Sinus Arm Drive

Berg¹,

Nørbygaard²

2006

Applied Spectroscopy Reviews

View full text Add to dashboard Cite

…………………………………………………………………… 1. Introduction………………………………………………………………. 2. Examination of Raman Spectrometer Systems……………………… 2.1 The DILOR-HORIBA "LabRam" Type…………………………… 2.2 The RENISHAW "Raman System 1000" Type………………… 3. Diffraction Physics of the Sinus Arm Drive………………………… 4. Principles of Operation………………………………………………… 5. Examination of Reproducibility and Calibration……………………. 6. Discussion of Reasons for CP Setting Errors……………………… 7. Temperature Effects…………………………………………………… 8. "Golden Values of CP"………………………………………………… 9. Solution to the Problems……………………………………………… 10. Conclusion ……………………………………………………………… Acknowledgements ……………………………………………………. References ………………………………………………………………

show abstract

Section: Temperature Effectssupporting

confidence: 89%

“…It is able to and likely to shift its frequency substantially with time and temperature, e.g. the laser wavelength drifts with temperature on the order of 0.0025 to 0.1 nm/ o C [18], [19] , and start-up mode jumps of ±0.2 nm have been found for a 532 nm Nd-YAG laser [18], [19], [20] , also in our laboratory [16] .…”

Section: Introductionmentioning

confidence: 93%

Wavenumber Calibration of CCD Detector Raman Spectrometers Controlled by a Sinus Arm Drive

Berg¹,

Nørbygaard²

2006

Applied Spectroscopy Reviews

View full text Add to dashboard Cite

show abstract

“…Reducing the TAT and the time needed for the microbial identification from 24 h or more to approximately 6 h would be a valuable step in the right direction. Raman spectroscopy is a technology with strong assets for the use in in vitro diagnostic (IVD) applications as it is a sensitive technique amenable to automation, 1 nonintrusive and possibly nondestructive assuming a proper selection of acquisition parameters. In microbiology, the ultimate sensitivity has been demonstrated as good quality Raman spectra can be acquired from a single bacterium, 2 therefore even suggesting the possible elimination of culture as a whole.…”

Section: Introductionmentioning

confidence: 99%

Direct identification of clinically relevant bacterial and yeast microcolonies and macrocolonies on solid culture media by Raman spectroscopy

et al. 2014

View full text Add to dashboard Cite

Abstract. Decreasing turnaround time is a paramount objective in clinical diagnosis. We evaluated the discrimination power of Raman spectroscopy when analyzing colonies from 80 strains belonging to nine bacterial and one yeast species directly on solid culture medium after 24-h (macrocolonies) and 6-h (microcolonies) incubation. This approach, that minimizes sample preparation and culture time, would allow resuming culture after identification to perform downstream antibiotic susceptibility testing. Correct identification rates measured for macrocolonies and microcolonies reached 94.1% and 91.5%, respectively, in a leave-one-strain-out cross-validation mode without any correction for possible medium interference. Large spectral differences were observed between macrocolonies and microcolonies, that were attributed to true biological differences. Our results, conducted on a very diversified panel of species and strains, were obtained by using simple and robust sample preparation and preprocessing procedures, while still confirming published results obtained by using more complex elaborated protocols. Instrumentation is simplified by the use of 532-nm laser excitation yielding a Raman signal in the visible range. It is, to our knowledge, the first side-by-side full classification study of microorganisms in the exponential and stationary phases confirming the excellent performance of Raman spectroscopy for early species-level identification of microorganisms directly from an agar culture. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

“…Melt spectra were collected using a HoloProbe RXN-2 analyzer (Kaiser Optical Systems Inc.) integrated Raman spectroscopy unit (785 nm laser and charge-coupled device (CCD) detector) interfaced with the melt by a fiber-optic in-line process probe. 32 The probe was mounted flush with the extruder barrel wall in a standard Dynisco transducer port in a 15 mm die head on the end of the extruder. The flush-mounted probe was used to acquire noninvasive point measurements from the melt flow.…”

Section: Figmentioning

confidence: 99%

Vibrational Spectroscopic and Ultrasound Analysis for In-Process Characterization of High-Density Polyethylene/Polypropylene Blends during Melt Extrusion

et al. 2005

View full text Add to dashboard Cite

show abstract

<title>Advances in fiber optic Raman instrumentation</title>

Cited by 5 publications

References 0 publications

Wavenumber Calibration of CCD Detector Raman Spectrometers Controlled by a Sinus Arm Drive

Wavenumber Calibration of CCD Detector Raman Spectrometers Controlled by a Sinus Arm Drive

Direct identification of clinically relevant bacterial and yeast microcolonies and macrocolonies on solid culture media by Raman spectroscopy

Vibrational Spectroscopic and Ultrasound Analysis for In-Process Characterization of High-Density Polyethylene/Polypropylene Blends during Melt Extrusion

Contact Info

Product

Resources

About