Multiresolution analysis for quantification of optical properties in scattering media using pulsed photon time-of-flight measurements

Gributs, Claudia E.W.; Burns, David H.

doi:10.1016/s0003-2670(03)00534-8

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…Prediction rates for the independent test set should be similar to the prediction rates obtained during training if the model has been optimally trained. The number of observations to be reserved for the independent test set depends somewhat on the total number of observations; Gributs and Burns (2003) used half the available data as an independent test set while Davis et al (2006) used a third of the data.…”

Section: Qualitative Metabolomic Analyses: Multivariate Analysismentioning

confidence: 99%

Metabolomic applications of HILIC–LC–MS

Cubbon

António

Wilson

et al. 2009

Mass Spectrometry Reviews

168

109

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Hydrophilic interaction liquid chromatography (HILIC), although not a new technique, has enjoyed a recent renaissance with the introduction of robust and reproducible stationary phases. It is consequently finding application in metabolomics studies, which have traditionally relied on the stability of reversed phases (RPs), since the biofluids analyzed are predominantly aqueous and thus contain many polar analytes. HILIC's retention of those polar compounds and use of solvents readily compatible with mass spectrometry have seen its increasing adoption in studies of complex aqueous metabolomes. This review describes the stationary phases and their features, surveys HILIC-LC-MS's role in metabolomics experiments, discusses approaches to data extraction and analysis including multivariate analysis, and reviews the literature on HILIC-MS applications in metabolomics.

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Section: Qualitative Metabolomic Analyses: Multivariate Analysismentioning

confidence: 99%

Metabolomic applications of HILIC–LC–MS

Cubbon

António

Wilson

et al. 2009

Mass Spectrometry Reviews

168

109

View full text Add to dashboard Cite

show abstract

“…PC3 might explain the residual variation of the slope and peak maxima of the time-resolved profile. As the increasing/decreasing slope of the transmitted beam include the information of light scattering (Gributs and Burns 2003a), PC2 loading could explain its dependency of sample thickness. The entire shape of time-resolved profiles of transmitted beam is useful to evaluate the conditions of light absorption and scattering.…”

Section: Eoplsmentioning

confidence: 99%

Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy

2011

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A new optical measurement system, the main components of which are a diode-pumped solid state laser and avalanche photodiodes, was introduced to clarify the optical characteristics of wood from the viewpoint of time-of-flight near infrared spectroscopy. The sample thickness and the wavelength of input pulsed laser clearly influenced the transmitted time-resolved profile. The effective optical path length became 15 times longer than the sample thickness. The optical model based on the diffusion approximation to the radiative transfer equation proved to be useful for thick samples, which can be optically regarded as an ideal diffuser, although wood is a structural material with non-homogeneous cellular structure.

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“…[6][7][8] Burns et al furthermore reported that experimental analysis of the time-resolved profile was very efficient for estimating the absorption and scattering coefficient. [9][10][11] Many applications utilizing time-resolved reflectance and transmittance have been widely investigated for human head, 12,13 plastic materials, 14 and agricultural or forest products. 15,16 The behavior of transmitted light from the sample is directly affected by the physical and chemical properties of the tissues, making it very important to examine the optical characteristics of them and the output origin of the transmitted light in detail from a new spectroscopic viewpoint.…”

Section: Introductionmentioning

confidence: 99%

Application of Time-of-Flight Near-Infrared Spectroscopy to Fruits: Analysis of Absorption and Scattering Conditions of Near-Infrared Radiation Using Cross-Correlation of the Time-Resolved Profile

Kurata

Tsuchikawa

2009

Appl Spectrosc

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The absorption and scattering conditions of near-infrared radiation in a grapefruit, a popular thick-peeled fruit, were investigated by time-of-flight near-infrared spectroscopy (TOF-NIRS). The cross-correlation function was introduced to obtain fine spectroscopic information from the time-resolved profile. Variation of the optical parameters in both the time-resolved profile and the cross-correlation function showed that the NIR radiation was largely absorbed in the peel and considerably scattered in the flesh of the fruit. It also reflected the straightness of the input pulsed laser. The substantial optical path length of the grapefruit estimated from the cross-correlation function was approximately 4 to 5 times as long as the nominal optical path length (NOPL). The cross-correlation function was an effective tool to analyze the absorption/scattering conditions of NIR radiation in a sample where an unstable light source such as a Nd:YAG laser with high output energy was employed.

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Multiresolution analysis for quantification of optical properties in scattering media using pulsed photon time-of-flight measurements

Cited by 7 publications

References 29 publications

Metabolomic applications of HILIC–LC–MS

Metabolomic applications of HILIC–LC–MS

Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy

Application of Time-of-Flight Near-Infrared Spectroscopy to Fruits: Analysis of Absorption and Scattering Conditions of Near-Infrared Radiation Using Cross-Correlation of the Time-Resolved Profile

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