Optimization of the Rolling-Circle Filter for Raman Background Subtraction

Брандт, Н.Н.; Brovko, Oleg O.; Chikishev, A. Yu.; Paraschuk, O. D.

doi:10.1366/000370206776342553

Cited by 121 publications

(103 citation statements)

References 13 publications

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“…The Raman spectra are recorded at 784.5 nm for . The rolling circle method (Brandt, 2006) was applied to remove fluorescence background arising from the optics. rresponding SERDS spectra at the positions  and  (1 s recording time per laser).…”

Section: Aspirin Effectmentioning

confidence: 99%

“…Figure 8 tensity distribution of the silicon Raman peak at 522 cm -1 . The Raman spectra are recorded at 784.5 nm for circle method (Brandt, 2006) was applied to remove fluorescence background arising from the optics. plate with 0.66 mm thickness is used for testing AO2 and a comparison with AO1.…”

Section: Siliconmentioning

confidence: 99%

“…At the lower left, the silicon plate touches th 10 right shows the intensity distribution of the silicon Raman peak at 522 cm -1 . The 20 s. The rolling circle method (Brandt, 2006) , which corresponds to the distribution of the agent acetylsalicylic acid. B…”

Section: Siliconmentioning

confidence: 99%

“…Figure 14 shows the situation at 0, 390 and 780 s. At the top Raman and camera images, at the bottom the corresponding Raman spectra at the spatial position (X/Y ) = (7/8) are displayed. The rolling circle method (Brandt et al, 2006) was applied to remove background. The spectra reveal that the sugar piece consists of sucrose (Brizuela et al, 2012).…”

Section: Piece Of Brown Sugarmentioning

confidence: 99%

“…Porcine ear with the cut face down at the calcium fluoride plate of the Raman sample chamber. (Brandt et al, 2006). The Raman spectra of the letter "E" received with AO1 at 784.5 cm −1 previously were likewise background-corrected with the rolling circle method.…”

mentioning

confidence: 99%

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Ultrafast imaging Raman spectroscopy of large-area samples without stepwise scanning

Schmälzlin

Moralejo

Darvin

et al. 2016

J. Sens. Sens. Syst.

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Abstract.Step-by-step, time-consuming scanning of the sample is still the state-of-the-art in imaging Raman spectroscopy. Even for a few 100 image points the measurement time may add up to minutes or hours. A radical decrease in measurement time can be achieved by applying multiplex spectrographs coupled to imaging fiber bundles that are successfully used in astronomy. For optimal use of the scarce and expensive observation time at astronomical observatories, special high-performance spectrograph systems were developed. They are designed for recording thousands of spatially resolved spectra of a two-dimensional image field within one single exposure. Transferring this technology to imaging Raman spectroscopy allows a considerably faster acquisition of chemical maps. Currently, an imaging field of up to 1 cm 2 can be investigated. For porcine skin the required measurement time is less than 1 min. For this reason, this technique is of particular interest for medical diagnostics, e.g., the identification of potentially cancerous abnormalities of skin tissue.

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Section: Aspirin Effectmentioning

confidence: 99%

Section: Siliconmentioning

confidence: 99%

Section: Siliconmentioning

confidence: 99%

Section: Piece Of Brown Sugarmentioning

confidence: 99%

mentioning

confidence: 99%

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Ultrafast imaging Raman spectroscopy of large-area samples without stepwise scanning

Schmälzlin

Moralejo

Darvin

et al. 2016

J. Sens. Sens. Syst.

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Micro‐Raman spectroscopy of algae: Composition analysis and fluorescence background behavior

Huang

Beal

Cai

et al. 2010

Biotech & Bioengineering

128

106

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Preliminary feasibility studies were performed using Stokes Raman scattering for compositional analysis of algae. Two algal species, Chlorella sorokiniana (UTEX #1230) and Neochloris oleoabundans (UTEX #1185), were chosen for this study. Both species were considered to be candidates for biofuel production. Raman signals due to storage lipids (specifically triglycerides) were clearly identified in the nitrogen-starved C. sorokiniana and N. oleoabundans, but not in their healthy counterparts. On the other hand, signals resulting from the carotenoids were found to be present in all of the samples. Composition mapping was conducted in which Raman spectra were acquired from a dense sequence of locations over a small region of interest. The spectra obtained for the mapping images were filtered for the wavelengths of characteristic peaks that correspond to components of interest (i.e., triglyceride or carotenoid). The locations of the components of interest could be identified by the high intensity areas in the composition maps. Finally, the time evolution of fluorescence background was observed while acquiring Raman signals from the algae. The time dependence of fluorescence background is characterized by a general power law decay interrupted by sudden high intensity fluorescence events. The decreasing trend is likely a result of photo-bleaching of cell pigments due to prolonged intense laser exposure, while the sudden high intensity fluorescence events are not understood.

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Method development for in situ study of marine vanadium peroxidase based on SERS and chemometrics

Walsh

Josefson

Abrahamsson

2020

Journal of Chemometrics

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Vanadium peroxidases from marine algae are responsible for the production of ozone‐depleting compounds, volatile halogenated organic compounds (VHOC). Due to the impact the release of these compounds has on the global atmospheric and biogeochemical processes, there is an interest within marine sciences in developing analytical methods for studying the various aspects of the VHOC production, particularly in situ. This study aimed to provide new methods towards the development of in situ methods within marine sciences. We demonstrate the use of design of experiments together with orthogonal partial least squares (OPLS) and transposed orthogonal partial least squares (T‐OPLS) to address the qualitative spectral analysis of an enzyme‐buffer system. The measurements were performed with surface‐enhanced Raman spectroscopy (SERS) on vanadium bromoperoxisase from the red algae Corallina officinalis. The chemometric tools used aimed to provide greater insights into how factors such as time, amount of gold nanoparticles and enzyme concentration influence the spectral responses and whether there was any synergy between those factors. The results acquired in this report aim to support future method development of chemometrics within in situ applications in marine sciences.

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Optimization of the Rolling-Circle Filter for Raman Background Subtraction

Cited by 121 publications

References 13 publications

Ultrafast imaging Raman spectroscopy of large-area samples without stepwise scanning

Ultrafast imaging Raman spectroscopy of large-area samples without stepwise scanning

Micro‐Raman spectroscopy of algae: Composition analysis and fluorescence background behavior

Method development for in situ study of marine vanadium peroxidase based on SERS and chemometrics

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