Journal: Optics Express

Article Title: Scanning in situ Spectroscopy platform for imaging surgical breast tissue specimens

doi: 10.1364/OE.21.002185

Figure Lengend Snippet: (a) Average reflectance image of a spectralon standard (b) histogram of the average reflectance image showing no banding effects or patterns. Coefficient of variation is about 0.1 (c) Relative standard deviation spectra of two sequential, 15-minute, single spot measurement sequences. (d) Results from repeating the same set of measurements in (c) on a different day. (e) Reflectance spectra from a matrix of intralipid-blood phantoms, each group represents data from one particular intralipid concentration. Background hemoglobin concentrations for each group varied from 0 to 60 μM. Only the spectral waveband from 610 to 700nm was used to extract the scatter parameters. (f-h) Plots of average reflectance, logarithm of relative scatter amplitude and relative scatter power respectively, as a function of intralipid concentration. Error bars show variations in estimates due to change in background hemoglobin concentration.

Article Snippet: The measured spectra at each pixel position were background subtracted and normalized relative to measurements from a gray Spectralon standard (SRS-05, LabSphere Inc., NH, nominal albedo = 0.05).

Techniques: Standard Deviation, Concentration Assay

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: The measurement prototype includes four spectrometers in transmission mode and one spectrometer in reflectance mode as shown in conceptual drawing and picture of the measurement configuration.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Transmission Assay

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: Transmittance and reflectance spectra from Maaninka measurement campaign for ( a ) NIRONE 1.4 spectrometer in transmittance, ( b ) NIRONE 2.5 in transmittance, ( c ) NIRONE 2.0 in transmittance, ( d ) NIRONE 2.0 in reflectance and ( e ) TEC5 benchmark in transmittance with regions overlapping NIRONE ranges indicated.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques:

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: The optimal preprocessing and variable selection steps identified for each combination of spectrometer and milk component with the following abbreviations: Raw = no logarithmic transformation to absorbance, Log = logarithmic transformation to absorbance, No process = no pre-processing for that particular step, MSC = multiple scatter correction, Base = baseline correction, Detr = detrending; SGxDyy = Savitzky–Golay derivative of order x and with a window yy, OSC = orthogonal signal correction; MNCN = mean-centering, VIP = variable importance in projection, RiPLS = reversed interval partial least squares and FiPLS = forward interval partial least squares.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Selection, Transformation Assay

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: Scatter plots showing the validation and cross-validation predictions compared to measured fat concentration values for ( a ) NIRONE 1.4 spectrometer in transmittance, ( b ) NIRONE 2.0 spectrometer in transmittance, ( c ) NIRONE 2.5 spectrometer in transmittance, ( d ) NIRONE 2.0 spectrometer in reflectance and ( e ) TEC5 spectrometer in transmittance.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Biomarker Discovery, Concentration Assay

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: Scatter plots showing the validation and cross-validation predictions compared to measured protein concentration values for ( a ) NIRONE 1.4 spectrometer in transmittance, ( b ) NIRONE 2.0 spectrometer in transmittance, ( c ) NIRONE 2.5 spectrometer in transmittance, ( d ) NIRONE 2.0 spectrometer in reflectance and ( e ) TEC5 spectrometer in transmittance.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Biomarker Discovery, Protein Concentration

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: Scatter plots showing the validation and cross-validation predictions compared to measured lactose concentration values for ( a ) NIRONE 1.4 spectrometer in transmittance, ( b ) NIRONE 2.0 spectrometer in transmittance, ( c ) NIRONE 2.5 spectrometer in transmittance, ( d ) NIRONE 2.0 spectrometer in reflectance and ( e ) TEC5 spectrometer in transmittance.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Biomarker Discovery, Concentration Assay

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: The number of used latent variables for the partial least squares regression models obtained for each spectrometer and milk component with respective root mean square error of cross-validation (RMSECV) and prediction (RMSEP) values. Different superscript letters within a column indicate significant ( p ≤ 0.05) differences according to the Tukey Honestly Significant Difference (HSD) multiple comparison. T = transmittance; R = reflectance.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Comparison

Journal: Foods

Article Title: Evaluation of MEMS NIR Spectrometers for On-Farm Analysis of Raw Milk Composition

doi: 10.3390/foods10112686

Figure Lengend Snippet: Coefficients of determination for the partial least squares models of each spectrometer and milk component for cross-validation (R² CV ) and validation samples (R² P ). T = transmittance; R = reflectance.

Article Snippet: The cuvette, a white reflectance standard (40% Uncalibrated Spectralon Reflectance Standard, Labsphere, North Sutton, NH, USA) and a white transmittance standard (UV Fused Silica Ground Glass Diffuser, Thorlabs Sweden AB, Göteborg, Sweden) were installed on a translation stage (WGS06K-M57-0250-06 Linear stage, Wexon, Helsinki, Finland), oriented orthogonal to the light beam to bring either the filled cuvette or the spectral standards in the light path.

Techniques: Biomarker Discovery