3,204 results match your criteria Applied spectroscopy[Journal]


An Algorithm for the Removal of Cosmic Ray Artifacts in Spectral Data Sets.

Appl Spectrosc 2019 Apr 22:3702819839098. Epub 2019 Apr 22.

1 Department of Electronic Engineering, Maynooth University, Kildare, Ireland.

Cosmic ray artifacts may be present in all photo-electric readout systems. In spectroscopy, they present as random unidirectional sharp spikes that distort spectra and may have an affect on post-processing, possibly affecting the results of multivariate statistical classification. A number of methods have previously been proposed to remove cosmic ray artifacts from spectra but the goal of removing the artifacts while making no other change to the underlying spectrum is challenging. Read More

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http://dx.doi.org/10.1177/0003702819839098DOI Listing

Conformal Prediction Based on Raman Spectra for the Classification of Chinese Liquors.

Appl Spectrosc 2019 Apr 22:3702819831017. Epub 2019 Apr 22.

1 School of Science, Jiangnan University, Wuxi, China.

This work extends the conventional back-propagation neural network (BPNN) to the classification of Chinese liquors of different flavors according to their Raman spectra. Conformal prediction is applied to assign reliable confidence measures for each classification and support an effective framework to make the machine learning on classification trustable. The BPNN can be used to predict the flavors of Chinese liquors according to their Raman spectra, and a classification rate of 88. Read More

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http://dx.doi.org/10.1177/0003702819831017DOI Listing

EXPRESS: Two-Dimensional Correlation Spectroscopy Studies of Solution Mixtures in the Low Frequency Raman Region.

Appl Spectrosc 2019 Apr 22:3702819848501. Epub 2019 Apr 22.

University of Delaware.

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http://dx.doi.org/10.1177/0003702819848501DOI Listing

EXPRESS: Deploying Portable Gas Chromatography-Mass Spectrometry (GC-MS) to Military Users for the Identification of Toxic Chemical Agents in Theater.

Appl Spectrosc 2019 Apr 22:3702819849499. Epub 2019 Apr 22.

United States Marine Corps Regional Contact Logistics Support.

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http://dx.doi.org/10.1177/0003702819849499DOI Listing

EXPRESS: Homogenization of Plasma Emission Collection for Multichannel Spectrometers.

Appl Spectrosc 2019 Apr 16:3702819843992. Epub 2019 Apr 16.

University of Central Florida.

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http://dx.doi.org/10.1177/0003702819843992DOI Listing

[EXPRESS] Lighting the Ivory Track: Are Near Infrared and Chemometrics Up to the Job? A Proof of Concept.

Appl Spectrosc 2019 Apr 16:3702819837297. Epub 2019 Apr 16.

RMIT University.

A rapid tool to discriminate rhino horn and ivory samples from different mammalian species based on the combination of near-infrared reflection (NIR) spectroscopy and chemometrics was evaluated In this study, samples from the Australian Museum mammalogy collection were scanned between 950 to 1650 nm using a handheld spectrophotometer and analyzed using principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA). An overall correct classification rate of 73.5% was obtained for the classification of all samples. Read More

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http://dx.doi.org/10.1177/0003702819837297DOI Listing

EXPRESS: A Portable Spark-Induced Breakdown Spectroscopic Instrument and its Analytical Performance.

Appl Spectrosc 2019 Apr 16:3702819844792. Epub 2019 Apr 16.

Purdue University Weldon School of Biomedical Engineering.

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http://dx.doi.org/10.1177/0003702819844792DOI Listing

Applications of Spatial Light Modulators in Raman Spectroscopy.

Appl Spectrosc 2019 Apr 16:3702819834575. Epub 2019 Apr 16.

1 School of Physics and Astronomy, University of Nottingham, Nottingham, UK.

Advances in consumer display screen technologies have historically been adapted by researchers across the fields of optics as they can be used as electronically controlled spatial light modulators (SLMs) for a variety of uses. The performance characteristics of such SLM devices based on liquid crystal (LC) and digital micromirror device (DMD) technologies, in particular, has developed to the point where they are compatible with increasingly sensitive instrumental applications, for example, Raman spectroscopy. Spatial light modulators provide additional flexibility, from modulation of the laser excitation (including multiple laser foci patterns), manipulation of microscopic samples (optical trapping), or selection of sampling volume (adaptive optics or spatially offset Raman spectroscopy), to modulation in the spectral domain for high-resolution spectral filtering or multiplexed/compressive fast detection. Read More

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http://dx.doi.org/10.1177/0003702819834575DOI Listing
April 2019
2 Reads

Electrospray Film Deposition for Solvent-Elimination Infrared Spectroscopy.

Appl Spectrosc 2019 Apr 16:3702818821330. Epub 2019 Apr 16.

1 ENAC/IIE Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland.

The application of electrospray (ES) for quantitative transfer of analytes from solution to an internal reflection element for analysis by attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy has been developed in this work. The ES ATR FT-IR method is evaluated with non-volatile and semi-volatile organic and inorganic compounds dissolved in pure organic solvents or organics in a mixture with water. The technique demonstrates the capability for rapid solvent evaporation from dilute solutions, facilitating the creation of thin films that allow ATR FT-IR to generate transmission-mode-like spectra. Read More

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http://dx.doi.org/10.1177/0003702818821330DOI Listing
April 2019
1 Read

Advertising and Front Matter.

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Appl Spectrosc 2019 Apr;73(4):337-358

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http://dx.doi.org/10.1177/0003702819842070DOI Listing
April 2019
2 Reads

EXPRESS: Solid Sampling in Analysis of Various Plants Using Two-Jet Plasma Atomic Emission Spectrometry.

Authors:
Natalia P Zaksas

Appl Spectrosc 2019 Apr 5:3702819845935. Epub 2019 Apr 5.

Nikolaev Institute of Inorganic Chemistry.

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http://dx.doi.org/10.1177/0003702819845935DOI Listing

Sub-Micron Spatial Resolution in Far-Field Raman Imaging Using Positivity-Constrained Super-Resolution.

Appl Spectrosc 2019 Mar 27:3702819832355. Epub 2019 Mar 27.

2 Institut des Matériaux Jean Rouxel (IMN), UMR 6502 CNRS - Université de Nantes, Nantes, France.

Raman microscopy is a valuable tool for detecting physical and chemical properties of a sample material. When probing nanomaterials or nanocomposites the spatial resolution of Raman microscopy is not always adequate as it is limited by the optical diffraction limit. Numerical post-processing with super-resolution algorithms provides a means to enhance resolution and can be straightforwardly applied. Read More

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http://dx.doi.org/10.1177/0003702819832355DOI Listing

Erratum.

Authors:

Appl Spectrosc 2019 Apr 26;73(4):464. Epub 2019 Mar 26.

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http://dx.doi.org/10.1177/0003702819840160DOI Listing

Label-Free Fluorescence-Based Aptasensor for the Detection of Sulfadimethoxine in Water and Fish.

Appl Spectrosc 2019 Mar;73(3):294-303

1 College of Food and Biological Engineering, Jimei University, Xiamen, China.

Fluorescence-based aptasensors possess high sensitivity but are complicated and usually require multistep labeling and modification in method design, which severely limit the practical applications. Here, a label-free fluorescence-based aptasensor, consisting of aptamer, gold nanoparticles (AuNPs), and cadmium telluride (CdTe) quantum dots (QDs), was developed for the detection of sulfadimethoxine (SDM) in water and fish based on the specific recognition of SDM-aptamer and the inner filter effect of QDs and AuNPs. In the absence of a target, AuNPs dispersed in salt solution because of the aptamer protection, which could effectively quench the fluorescence emission of QDs, while in the presence of SDM, AuNPs aggregated due to the specific recognition of SDM-aptamer to SDM, which resulted in fluorescence recovery. Read More

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http://dx.doi.org/10.1177/0003702818799100DOI Listing

Advertising and Front Matter.

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Appl Spectrosc 2019 Mar;73(3):237-252

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http://dx.doi.org/10.1177/0003702819837165DOI Listing

Evaluation and Specifications for In-Line Uranium Separations Using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) Detection for Trace Elemental Analysis.

Appl Spectrosc 2019 Mar 27:3702819837650. Epub 2019 Mar 27.

1 Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.

Automated introduction platforms integrated with inductively coupled plasma optical emission spectroscopy (ICP-OES) systems are continuously being improved. Expanding on the introduction systems, a newly developed automated ion chromatography system was explored for performing rapid in-line separations coupled to ICP-OES for the detection of trace elements in uranium. Trace elements are separated from a uranium material and the analytes are directed into the ICP-OES for subsequent detection. Read More

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http://dx.doi.org/10.1177/0003702819837650DOI Listing
March 2019
1 Read

Treatment of Surface Plasmon Resonance (SPR) Background in Total Internal Reflection Ellipsometry: Characterization of RNA Polymerase II Film Formation.

Appl Spectrosc 2019 Mar 20;73(3):261-270. Epub 2019 Feb 20.

1 Department of Condensed Matter Physics, Masaryk University, Brno, Czech Republic.

To deal with the general problem of biomolecule specific binding analysis, we have applied the technique of difference spectra to the surface plasmon resonance (SPR)-enhanced total internal reflection ellipsometry measurement. We suggest a three-step treatment of the SPR background that can easily be integrated with the usual measurement routine. First, making use of the difference spectrum in ellipsometric angle Δ, single peak footprints of the topmost layer are obtained that facilitate its sensitive detection during film growth. Read More

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http://journals.sagepub.com/doi/10.1177/0003702819826280
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http://dx.doi.org/10.1177/0003702819826280DOI Listing
March 2019
10 Reads

Laser-Induced Breakdown Spectroscopic (LIBS) Analysis of Trace Heavy Metals Enriched by AlO Nanoparticles.

Appl Spectrosc 2019 Apr;73(4):380-386

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China.

We demonstrated a unique method for the detection of heavy metals, such as Ni, Cr, and Cd, at trace level in aqueous solutions by laser induced breakdown spectroscopy (LIBS) enriched by aluminum oxide (AlO) nanoparticles (NP) adsorption. AlO NPs were used for the sample phase transformation and heavy metals pre-concentration because of its excellent adsorption capacity and sparse spectral lines. The influence of laser wavelength and laser irradiance on the signal intensity was investigated. Read More

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http://dx.doi.org/10.1177/0003702819829509DOI Listing
April 2019
2 Reads

Acetone Tracer Laser-Induced Fluorescence (LIF) at 282 nm Excitation as a Diagnostic Tool in Elevated Pressure and Temperature Systems.

Appl Spectrosc 2019 Apr 22;73(4):395-402. Epub 2019 Feb 22.

3 Department of Mechanical Engineering, University of Connecticut, Storrs, CT, USA.

This paper provides new data at constant pressure, variable temperature and constant temperature, variable pressure over the range of temperature (295-750 K) and pressure (0.5-40 atm), in air and nitrogen bath gases at both constant number density and constant mole fraction needed to enable acetone laser-induced fluorescence (LIF) as a diagnostic tool in an elevated temperature and pressure environment. Results clearly indicate that the effect of elevated pressure on the temperature sensitivity of acetone LIF is negligible when the excitation wavelength is chosen near the absorption maximum, making acetone LIF ideal for measuring temperature fields in high-pressure systems. Read More

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http://dx.doi.org/10.1177/0003702819830447DOI Listing
April 2019
1 Read

Ultraviolet Spectral Analysis and Quantitative Detection of Heptafluoroisobutyronitrile (CFN) in a CFN-Carbon Dioxide (CO) Gas Mixture.

Appl Spectrosc 2019 Mar 8:3702819833702. Epub 2019 Mar 8.

2 Electric Power Research Institute, China Southern Power Grid, Guangzhou, China.

As an alternative to sulfur hexafluoride (SF) with great potential for application, heptafluoroisobutyronitrile-carbon dioxide (CFN-CO) gas mixture has been applied in various gas-insulated equipment. The insulation performance of the gas mixture is closely related to the mixing ratio. Therefore, accurate quantification of CFN in the CFN-CO gas mixture has very important engineering significance. Read More

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http://dx.doi.org/10.1177/0003702819833702DOI Listing
March 2019
3 Reads

Shipboard Characterization of Tuvalu, Samoa, and Lau Dredge Samples Using Laser-Induced Breakdown Spectroscopy (LIBS).

Appl Spectrosc 2019 Apr 22:3702819830793. Epub 2019 Apr 22.

1 Department of Earth Sciences, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, USA.

Chemical analysis using laser-induced breakdown spectroscopy (LIBS) is well suited for field applications and was applied here for shipboard characterization of a large sample set during the RR1310 rock dredging expedition to the Tuvalu Seamounts. Although recently the most common data treatment for LIBS has consisted of a partial least squares approach to define sample groupings, we show that quantitative data of useful quality can be obtained with a univariate approach. Here, our analysis goal was a quantitative comparison of the total alkali (NaO + KO) versus silica (SiO) contents of 586 representative dredge samples with known ranges in common rock types. Read More

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http://dx.doi.org/10.1177/0003702819830793DOI Listing
April 2019
1 Read
1.875 Impact Factor

Elemental Mapping of Lithium Diffusion in Doped Plant Leaves Using Laser-Induced Breakdown Spectroscopy (LIBS).

Appl Spectrosc 2019 Apr 21;73(4):387-394. Epub 2019 Mar 21.

1 Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

Mapping of element distributions and diffusion processes in plant tissue has great significance for understanding the systematic uptake, transport, and accumulation of nutrients and harmful elements in plants, and for studying the interaction between plants and the environment. In this work, we used laser-induced breakdown spectroscopy (LIBS) to study the elemental accumulation of Li and its diffusion in plant leaves. The spatially resolved information that LIBS offers, combined with its high sensitivity to light elements make this technology highly advantageous for the analysis of Li. Read More

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http://dx.doi.org/10.1177/0003702819830394DOI Listing
April 2019
4 Reads
1.875 Impact Factor

Adaptive Bad Pixel Correction Method for Interference-Modulated Images Based on Weighted Least Squares Support Vector Machines (WLS-SVM).

Appl Spectrosc 2019 Apr;73(4):454-463

Key Laboratory of Precision Opto-Mechatronics Technology Sponsored by Ministry of Education, School of Instrumentation and Opto-Electronics Engineering, Beihang University, Beijing, China.

Temporally and spatially modulated Fourier transform imaging spectrometers (TSMFTISs) can obtain images and interference information of targets during the data acquisition process for remote sensing. Temporally and spatially modulated Fourier transform imaging spectrometers play an important role in target classification and identification, as the spectrum information of targets can be reconstructed with the theory of Fourier transform spectroscopy. However, the defect pixels absent in the planar array charge-coupled device used in imaging spectrometers have a significant impact on the accuracy of target spectral recovery information, so the preprocessing of bad pixels in remote sensing interference images is indispensable to data processing in TSMFTIS. Read More

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http://dx.doi.org/10.1177/0003702819830776DOI Listing
April 2019
1.875 Impact Factor

Use of Visible-Near-Infrared (Vis-NIR) Spectroscopy to Detect Aflatoxin B on Peanut Kernels.

Appl Spectrosc 2019 Apr 20;73(4):415-423. Epub 2019 Feb 20.

2 USDA-ARS, Southern Regional Research Center, New Orleans, LA, USA.

Current methods for detecting aflatoxin contamination of agricultural and food commodities are generally based on wet chemical analyses, which are time-consuming, destructive to test samples, and require skilled personnel to perform, making them impossible for large-scale nondestructive screening and on-site detection. In this study, we utilized visible-near-infrared (Vis-NIR) spectroscopy over the spectral range of 400-2500 nm to detect contamination of commercial, shelled peanut kernels (runner type) with the predominant aflatoxin B (AFB). The artificially contaminated samples were prepared by dropping known amounts of aflatoxin standard dissolved in 50:50 (v/v) methanol/water onto peanut kernel surface to achieve different contamination levels. Read More

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http://journals.sagepub.com/doi/10.1177/0003702819829725
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http://dx.doi.org/10.1177/0003702819829725DOI Listing
April 2019
8 Reads

Structural and Optical Characteristics of Aqueous Solutions of Acetic Acid.

Appl Spectrosc 2019 Feb 20:3702819831325. Epub 2019 Feb 20.

2 Uzbekistan-Japan Innovation Center of Youth, Tashkent State Technical University, Tashkent, Uzbekistan.

A refractometric method, coupled with molecular dynamics study, attenuated total reflection Fourier transform infrared (ATR FT-IR), and Raman spectroscopy, was used to determine optical characteristics of concentration features of aqueous solutions of acetic acid. Measurements of the refractive index of aqueous solutions of acetic acid in the wide range of acetic acid concentrations (∼ 0 ÷ 1 mole fraction) in a solution at a room temperature were conducted. Maximum value of refractive index was detected at a concentration of ∼0. Read More

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http://dx.doi.org/10.1177/0003702819831325DOI Listing
February 2019
2 Reads

Digital Staining of High-Definition Fourier Transform Infrared (FT-IR) Images Using Deep Learning.

Appl Spectrosc 2019 Jan 18:3702818819857. Epub 2019 Jan 18.

Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA.

Histological stains, such as hematoxylin and eosin (H&E), are routinely used in clinical diagnosis and research. While these labels offer a high degree of specificity, throughput is limited by the need for multiple samples. Traditional histology stains, such as immunohistochemical labels, also rely only on protein expression and cannot quantify small molecules and metabolites that may aid in diagnosis. Read More

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http://dx.doi.org/10.1177/0003702818819857DOI Listing
January 2019
2 Reads

Cyclic Changes in the Amide Bands Within Escherichia coli Biofilms Monitored Using Real-Time Infrared Attenuated Total Reflection Spectroscopy (IR-ATR).

Appl Spectrosc 2019 Apr 20;73(4):424-432. Epub 2019 Feb 20.

3 Institute of Analytical and Bioanalytical Chemistry, Ulm University, Ulm, Germany.

Contrary to the planktonic state of bacteria, their biofilm form represents severe complications in areas such as human medicine or food industry due to the increasing resistance against harsh conditions and treatment. In the present study, infrared attenuated total reflection (IR-ATR) spectroscopy has been applied as an analytic tool studying Escherichia coli ( E. coli) biofilm formation close to real time. Read More

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http://dx.doi.org/10.1177/0003702819829081DOI Listing
April 2019
3 Reads

Online Characterization of Single Airborne Carbon Nanotube Particles Using Optical Trapping Raman Spectroscopy.

Appl Spectrosc 2019 Apr 16:3702819828809. Epub 2019 Apr 16.

1 Department of Physics and Astronomy, Mississippi State University, Starkville, MS, USA.

Carbon nanotubes (CNTs) have become recognized as a potential environmental and health hazard as their applications are broadening and manufacturing costs are reducing. Fundamental information of CNTs in air is of significant importance to our understanding of their environmental fate as well as to further applications. Extensive efforts have been made over decades on characterizing CNTs; however, a majority of the studies are of bulk or CNTs dispersed on substrates. Read More

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http://dx.doi.org/10.1177/0003702819828809DOI Listing
April 2019
2 Reads

Discrimination Between Explosive Materials and Isomers Using a Human Color Vision-Inspired Sensing Method.

Appl Spectrosc 2019 Feb 19:3702819828411. Epub 2019 Feb 19.

1 Optical Sciences Division, US Naval Research Laboratory, Washington, DC, USA.

This paper describes the application of a human color vision approach to infrared (IR) chemical sensing for the discrimination between multiple explosive materials deposited on aluminum substrates. This methodology classifies chemicals using the unique response of the chemical vibrational absorption bands to three broadband overlapping IR optical filters. For this effort, Fourier transform infrared (FT-IR) spectroscopy is first used to computationally examine the ability of the human color vision sensing approach to discriminate between three similar explosive materials, 1,3,5,-Trinitro-1,3,5-triazinane (RDX), 2,2-Bis[(nitrooxy)methyl]propane-1,3,-diyldinitrate (PETN), and 1,3,5,7-Tetranitro-1,3,5,7-tetrazocane (HMX). Read More

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http://dx.doi.org/10.1177/0003702819828411DOI Listing
February 2019
3 Reads

A Review of Chinese Raman Spectroscopy Research Over the Past Twenty Years.

Appl Spectrosc 2019 Mar 21:3702819828360. Epub 2019 Mar 21.

Department of Optical and Electronic Technology, China Jiliang University, China.

This paper introduces the major Chinese research groups in the fields of biomedicine, food safety, environmental testing, material research, archaeological and cultural relics, gem identification, forensic science, and other research areas of Raman spectroscopy and combined methods spanning the two decades from 1997 to 2017. Briefly summarized are the research directions and contents of the major Chinese Raman spectroscopy research groups, giving researchers engaged in Raman spectroscopy research a more comprehensive understanding of the state of Chinese Raman spectroscopy research and future development trends to further develop Raman spectroscopy and its applications. Read More

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http://dx.doi.org/10.1177/0003702819828360DOI Listing
March 2019
13 Reads

EXPRESS: Deep Learning with Laser-Induced Breakdown Spectroscopy (LIBS) for Predicting Lead in Soil.

Appl Spectrosc 2019 Jan 9:3702819826283. Epub 2019 Jan 9.

Zhejiang University School of Biosystems Engineering and Food Science.

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http://dx.doi.org/10.1177/0003702819826283DOI Listing
January 2019
20 Reads

Combined Microspectroscopic Characterization of a Red-Colored Granite Rock Sample.

Appl Spectrosc 2019 Feb 7:3702818823555. Epub 2019 Feb 7.

Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan.

Combined microspectroscopic mapping have been conducted on a red-colored Tenzan granite sample by using an original visible-fluorescence-Raman microspectrometer together with a low vacuum scanning electron microscopy-energy dispersive spectrometry (SEM-EDS) without coating. Visible darkfield reflectance spectra were converted to L*a*b* color values and Kubelka-Munk (KM) spectra. Large a* value (red) positions correspond to large band areas at 500-560 nm, possibly due to hematite-like iron oxide, while large b* value (yellow) positions to large band areas at 450-500 nm, due to epidote-like mineral. Read More

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http://dx.doi.org/10.1177/0003702818823555DOI Listing
February 2019
2 Reads

Nondestructive Chemical Analysis of the Iron-Containing Protein Ferritin Using Raman Microspectroscopy.

Appl Spectrosc 2019 Feb 7:3702818823203. Epub 2019 Feb 7.

Institute of Hydrochemistry, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Munich, Germany.

Ferritin is a ubiquitous intracellular iron storage protein of animals, plants, and bacteria. The cavity of this protein acts like a reaction chamber for natural formation and storage of nano-sized particles via biomineralization. Knowledge of the chemical composition and structure of the iron core is highly warranted in the fields of nano technologies as well as biomolecules and medicine. Read More

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http://dx.doi.org/10.1177/0003702818823203DOI Listing
February 2019
1 Read

Mid-Infrared Polarization Spectroscopy Measurements of Species Concentrations and Temperature in a Low-Pressure Flame.

Appl Spectrosc 2019 Mar 27:3702818823239. Epub 2019 Mar 27.

Division of Combustion Physics, Lund University, Lund, Sweden.

We demonstrate quantitative measurements of methane (CH) mole fractions in a low-pressure fuel-rich premixed dimethyl ether/oxygen/argon flat flame (Φ = 1.87, 37 mbar) using mid-infrared (IR) polarization spectroscopy (IRPS). Non-intrusive in situ detection of CH, acetylene (CH), and ethane (CH) in the flame was realized by probing the fundamental asymmetric C-H stretching vibration bands in the respective molecules in the spectral range 2970-3340 cm. Read More

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http://dx.doi.org/10.1177/0003702818823239DOI Listing
March 2019
2 Reads

EXPRESS: An On-Off-On Fluorescence Probe Based on Coumarin for Cu, Cysteine and Histidine Detections.

Appl Spectrosc 2018 Dec 7:3702818821329. Epub 2018 Dec 7.

Guilin University of Technology.

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http://dx.doi.org/10.1177/0003702818821329DOI Listing
December 2018
2 Reads

Two-Dimensional Correlation Spectroscopy (2D-COS) for Analysis of Spatially Resolved Vibrational Spectra.

Appl Spectrosc 2019 Apr 21;73(4):359-379. Epub 2019 Mar 21.

2 Department of Materials Science and Engineering, University of Delaware, Newark, DE, USA.

The last two decades have seen tremendous progress in the application of two-dimensional correlation spectroscopy (2D-COS) as a versatile analysis method for data series obtained using a large variety of different spectroscopic modalities, including infrared (IR) and Raman spectroscopy. The analysis technique is applicable to a series of spectra recorded under the influence of an external sample perturbation. Two-dimensional COS analysis is not only helpful to decipher correlations, which may exist between distinct spectral features, but can also be utilized to obtain the sequence of individual spectral changes. Read More

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http://dx.doi.org/10.1177/0003702818819880DOI Listing
April 2019
7 Reads

Comparative Investigation of Secondary Cell Wall Development in Cotton Fiber Near Isogenic Lines Using Attenuated Total Reflection Fourier Transform Infrared Spectroscopy (ATR FT-IR).

Appl Spectrosc 2019 Mar 15;73(3):329-336. Epub 2019 Jan 15.

2 USDA, ARS, Southern Regional Research Center (SRRC), Cotton Fiber Bioscience Research Unit, New Orleans, LA, USA.

In this investigation, we applied previously proposed simple algorithms to analyze the attenuated total reflection Fourier transform infrared (ATR FT-IR) spectra of cotton fibers during secondary cell wall (SCW) biosynthesis. The infrared crystallinity ( CI) and maturity ( M) indices were compared from developmental fibers representing two pairs of upland cotton near isogenic lines (NILs). One pair of NILs consisted of Texas Marker-1 (TM-1) and an immature fiber ( im) mutant that differ in fiber maturity. Read More

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http://dx.doi.org/10.1177/0003702818818171DOI Listing
March 2019
4 Reads