3,378 results match your criteria Applied spectroscopy[Journal]


EXPRESS: Raman Spectroscopic Study of Phase Coexistence in Binary Phospholipid Bilayers.

Appl Spectrosc 2020 Jul 14:3702820945764. Epub 2020 Jul 14.

Institute of Automation and Electrometry Siberian Branch of the Russian Academy of Sciences.

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http://dx.doi.org/10.1177/0003702820945764DOI Listing

Noninvasive Cellular Oxygenation Measurement During Graded Hypoxia Using Visible-Near-Infrared Spectroscopy.

Appl Spectrosc 2020 Jul 14:3702820938867. Epub 2020 Jul 14.

Department of Pediatrics, University of Washington, Seattle, WA, USA.

In critically ill patients, direct knowledge of intracellular pO would allow for identification of cellular hypoxia, which when prolonged leads to organ failure. We have developed a visible-near-infrared optical system that noninvasively measures myoglobin saturation, which is directly related to intracellular pO, from the surface of the skin. We used an animal model of graded hypoxia from low levels of inspired oxygen ( = 5) and verified that low intracellular pO is correlated with high steady-state serum lactate values. Read More

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http://dx.doi.org/10.1177/0003702820938867DOI Listing

Determination of Stark Shifts and Widths Using Time Resolved Laser-Induced Breakdown Spectroscopy (LIBS) Measurements.

Appl Spectrosc 2020 Jun 30:3702819891172. Epub 2020 Jun 30.

Physical Research Laboratory, Ahmedabad, India.

Stark broadening parameters have been estimated for resonant lines of Al(I) using time resolved measurements. The relation between the various emission line characteristics at different phases of opacity have been utilized to obtain the value of plasma temperature and Stark width parameters from the experimental data. The observed value of the center line intensity and Lorentzian component of the line width are compared against a simulated value of these parameters for optically thin case. Read More

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http://dx.doi.org/10.1177/0003702819891172DOI Listing

EXPRESS: An Approach to Measuring the Point Spread Function of the Confocal Raman Microscope.

Appl Spectrosc 2020 Jun 29:3702820942599. Epub 2020 Jun 29.

Beijing Institute of Technology.

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http://dx.doi.org/10.1177/0003702820942599DOI Listing

EXPRESS: Characterization of Synthetic Hydroxyapatite Fibers Using High Resolution, Polarized Raman Spectroscopy.

Authors:
Furqan Ali Shah

Appl Spectrosc 2020 Jun 26:3702820942540. Epub 2020 Jun 26.

University of Gothenburg Sahlgrenska Academy.

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http://dx.doi.org/10.1177/0003702820942540DOI Listing

EXPRESS: Beyond Beer's Law: Spectral Mixing Rules.

Appl Spectrosc 2020 Jun 26:3702820942273. Epub 2020 Jun 26.

Leibniz-Institut fur Photonische Technologien.

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http://dx.doi.org/10.1177/0003702820942273DOI Listing

EXPRESS: Monitoring Polyurethane Foaming Reactions Using Near-Infrared Hyperspectral Imaging.

Appl Spectrosc 2020 Jun 25:3702820941877. Epub 2020 Jun 25.

The Dow Chemical Company.

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http://dx.doi.org/10.1177/0003702820941877DOI Listing

Erratum.

Authors:

Appl Spectrosc 2020 06;74(6):728

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http://dx.doi.org/10.1177/0003702820929631DOI Listing

Feature Selection and Rapid Characterization of Bloodstains on Different Substrates.

Appl Spectrosc 2020 Jul 3:3702820937776. Epub 2020 Jul 3.

Department of Biomedical Engineering, Vanderbilt University, Nashville, USA.

Establishing the precise timeline of a crime can be challenging as current analytical techniques used suffer from many limitations and are destructive to the body fluids encountered at crime scenes. Raman spectroscopy has demonstrated excellent potential in forensic science as it provides direct information about the structural and molecular changes without the need for processing or extracting samples. However, its current applicability is limited to pure body fluids, as signals from the substrate underlying these fluids greatly influence the current models used for age estimation. Read More

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http://dx.doi.org/10.1177/0003702820937776DOI Listing
July 2020
1.875 Impact Factor

EXPRESS: A Monolithic Spatial Heterodyne Raman Spectrometer: Initial Tests.

Appl Spectrosc 2020 Jun 4:3702820936643. Epub 2020 Jun 4.

University of South Carolina.

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http://dx.doi.org/10.1177/0003702820936643DOI Listing

A Simple Calibration Method of Anti-Stokes-Stokes Raman Intensity Ratios Using the Water Spectrum for Intracellular Temperature Measurements.

Appl Spectrosc 2020 Jul 10:3702820933908. Epub 2020 Jul 10.

Department of Chemistry, Kwansei Gakuin University, Sanda, Japan.

Presented here is a facile and practical method for calibrating anti-Stokes-Stokes intensity ratios in low-frequency Raman spectra that is devised specifically for temperature measurements inside cells. The proposed method uses as an intensity standard the low-frequency Raman spectrum of liquid water, a major molecular component of cells, whose temperature is independently measured with a thermocouple. Rather than calibrating pixel intensities themselves, we obtain a correction factor at each Raman shift in the 20-200 cm region by dividing the anti-Stokes-Stokes intensity ratio calculated theoretically from the Boltzmann factor at the known temperature by that obtained experimentally. Read More

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http://dx.doi.org/10.1177/0003702820933908DOI Listing

Nanoscale Spatial Resolution in Far-Field Raman Imaging Using Hyperspectral Unmixing in Combination with Positivity Constrained Super-Resolution.

Appl Spectrosc 2020 Jul 26;74(7):780-790. Epub 2020 May 26.

Institut des Matériaux Jean Rouxel Nantes (IMN), Nantes, France.

This work introduces hyper-resolution (HyRes), a numerical approach for spatial resolution enhancement that combines hyperspectral unmixing and super-resolution image restoration (SRIR). HyRes yields a substantial increase in spatial resolution of Raman spectroscopy while simultaneously preserving the undistorted spectral information. The resolving power of this technique is demonstrated on Raman spectroscopic data from a polymer nanowire sample. Read More

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http://dx.doi.org/10.1177/0003702820920688DOI Listing

Monitoring the Caustic Dissolution of Aluminum Alloy in a Radiochemical Hot Cell Using Raman Spectroscopy.

Appl Spectrosc 2020 Jul 9:3702820933616. Epub 2020 Jul 9.

Oak Ridge National Laboratory, Oak Ridge, USA.

Chemical processing of highly radioactive materials commonly takes place in heavily shielded hot cells. The remote, real-time monitoring of chemical processing streams via optical spectroscopic techniques in hot cells may be particularly useful. Here, we describe the implementation of Raman spectroscopy and chemometric analysis to monitor the dissolution of aluminum-clad targets containing irradiated aluminum-neptunium oxide cermet pellets in caustic solutions in a hot cell environment. Read More

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http://dx.doi.org/10.1177/0003702820933616DOI Listing

High-Throughput Analyses of Microplastic Samples Using Fourier Transform Infrared and Raman Spectrometry.

Appl Spectrosc 2020 Jun 19:3702820932926. Epub 2020 Jun 19.

Leibniz-Institut für Polymerforschung Dresden e.V., Dresden, Germany.

Determining microplastics in environmental samples quickly and reliably is a challenging task. With a largely automated combination of optical particle analysis, Fourier transform infrared (FT-IR), and Raman microscopy along with spectral database search, particle sizes, particle size distributions, and the type of polymer including particle color can be determined. We present a self-developed, open-source software package for realizing a particle analysis approach with both Raman and FT-IR microspectroscopy. Read More

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http://dx.doi.org/10.1177/0003702820932926DOI Listing

EXPRESS: The Expanding Frontiers of Tip-Enhanced Raman Spectroscopy.

Appl Spectrosc 2020 May 18:3702820932229. Epub 2020 May 18.

University of Illinois at Chicago College of Liberal Arts and Sciences.

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http://dx.doi.org/10.1177/0003702820932229DOI Listing

Monitoring the Progress and Healing Status of Burn Wounds Using Infrared Spectroscopy.

Appl Spectrosc 2020 Jul 18;74(7):758-766. Epub 2020 May 18.

Instituto de Pesquisas Energeticas e Nucleares (IPEN-CNEN/SP), University of Sao Paulo (USP), Sao Paulo, Brazil.

Burns are one of the leading causes of morbidity worldwide and the most costly traumatic injuries. A better understanding of the molecular mechanisms in wound healing is required to accelerate tissue recovery and reduce the health economic impact. However, the standard techniques used to evaluate the biological events associated to wound repair are laborious, time-consuming, and/or require multiple assays/staining. Read More

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http://dx.doi.org/10.1177/0003702820919446DOI Listing

Two-Dimensional Correlation Spectroscopy: The Power of Power Spectra.

Appl Spectrosc 2020 Jun 8:3702820931156. Epub 2020 Jun 8.

Faculty of Chemistry, University of Wrocław, Wrocław, Poland.

Power spectra are a powerful tool provided by two-dimensional correlation analysis. However, this tool is seldom used in practice. This work shows selected examples of using of the power spectra for the study of various kinds of samples with the aim to promote more common use of this tool. Read More

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http://dx.doi.org/10.1177/0003702820931156DOI Listing

EXPRESS: Surface-Enhanced Raman Spectroscopy for Rapid Screening of Cinnamon Essential Oils.

Authors:
Nilam C Shah

Appl Spectrosc 2020 May 14:3702820931154. Epub 2020 May 14.

Lake Forest College.

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http://dx.doi.org/10.1177/0003702820931154DOI Listing

Reporting Guidelines to Increase the Reproducibility and Comparability of Research on Microplastics.

Appl Spectrosc 2020 Jun 12:3702820930292. Epub 2020 Jun 12.

University of Birmingham, School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, Edgbaston, UK.

The ubiquitous pollution of the environment with microplastics, a diverse suite of contaminants, is of growing concern for science and currently receives considerable public, political, and academic attention. The potential impact of microplastics in the environment has prompted a great deal of research in recent years. Many diverse methods have been developed to answer different questions about microplastic pollution, from sources, transport, and fate in the environment, and about effects on humans and wildlife. Read More

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http://dx.doi.org/10.1177/0003702820930292DOI Listing

Raman Spectroscopy Allows for the Determination of Elephant Ivory Age.

Appl Spectrosc 2020 Jun 11:3702820930037. Epub 2020 Jun 11.

Department of Physics, SUNY University at Albany, Albany, USA.

Determination of the age of ivory is important for controlling illegal trafficking and the proper identification of ivory artifacts. Radiocarbon dating is the standard method of determining the age of ivories; however, it requires the destruction of a fragment of the sample. Raman spectroscopy is a nondestructive technique, and therefore can be used on artwork. Read More

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http://dx.doi.org/10.1177/0003702820930037DOI Listing

Infrared Optical Constants from Pressed Pellets of Powders: I. Improved and Values of (NH)SO from Single-Angle Reflectance.

Appl Spectrosc 2020 Jun 25:3702820930009. Epub 2020 Jun 25.

Pacific Northwest National Laboratory, Richland, WA, USA.

In combination with other parameters, the real, (), and imaginary, (), components of the complex refractive index,  =  + i, can be used to simulate the optical properties of a material in different forms, e.g., its infrared spectra. Read More

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http://dx.doi.org/10.1177/0003702820930009DOI Listing

Improved Infrared Optical Constants from Pressed Pellets: II. Ellipsometric and Values for Ammonium Sulfate with Variability Analysis.

Appl Spectrosc 2020 Jun 12:3702820928358. Epub 2020 Jun 12.

Pacific Northwest National Laboratory, Richland, USA.

Infrared reflectance analysis is facilitated via the comparison of spectra recorded in situ to a databank of actual or synthetic infrared reflectance spectra. It has recently been shown that reference spectra corresponding to the many different morphological forms of the same chemical can be generated synthetically using the imaginary, , and real, , components of the complex refractive index,  =  + i. One method to obtain the and vectors is infrared ellipsometry, which measures the changes in amplitude, tan Ψ, and phase, Δ, of polarized light reflected from the sample both as a function of wavenumber and angle of incidence. Read More

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http://dx.doi.org/10.1177/0003702820928358DOI Listing

New Insight into Titanium-Magnesium Ziegler-Natta Catalysts Using Photoluminescence Spectroscopy.

Appl Spectrosc 2020 Jun 18:3702820927434. Epub 2020 Jun 18.

Boreskov Institute of Catalysis, Novosibirsk, Russia.

This paper presents the results of study of titanium-magnesium catalysts often used in polymerization processes, by photoluminescence spectroscopy (PL) in combination with diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The interaction of dibutyl phthalate (DBP) with MgCl was studied at DBP/Mg = 0-1 (mol/mol). The luminescence spectra with excitation at 278 nm and the excitation spectra for main emission bands were recorded. Read More

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http://dx.doi.org/10.1177/0003702820927434DOI Listing

Differentiating Between Malignant Mesothelioma and Other Pleural Lesions Using Fourier Transform Infrared Spectroscopy.

Appl Spectrosc 2020 Jul 29;74(7):808-818. Epub 2020 May 29.

Department of Pathology, School of Medicine, University of Zagreb, Zagreb, Croatia.

Histopathology, despite being the gold standard as a diagnostic tool, does not always provide a correct diagnosis for different pleural lesions. Although great progress was made in this field, the problem to differentiate between reactive and malignant pleural lesions still stimulates the search for additional diagnostic tools. Our research using vibrational spectroscopy and principal component analysis (PCA) statistical modeling represents a potentially useful tool to approach the problem. Read More

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http://dx.doi.org/10.1177/0003702820924726DOI Listing

Comparison of Individual and Integrated Inline Raman, Near-Infrared, and Mid-Infrared Spectroscopic Models to Predict the Viscosity of Micellar Liquids.

Appl Spectrosc 2020 Jul 29;74(7):819-831. Epub 2020 May 29.

Unilever R&D, Port Sunlight, UK.

In many industries, viscosity is an important quality parameter which significantly affects consumer satisfaction and process efficiency. In the personal care industry, this applies to products such as shampoo and shower gels whose complex structures are built up of micellar liquids. Measuring viscosity offline is well established using benchtop rheometers and viscometers. Read More

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http://dx.doi.org/10.1177/0003702820924043DOI Listing

Application of a Hybrid Fusion Classification Process for Identification of Microplastics Based on Fourier Transform Infrared Spectroscopy.

Appl Spectrosc 2020 Jun 1:3702820923993. Epub 2020 Jun 1.

Department of Chemistry, Idaho State University, Pocatello, USA.

Microplastic research is an emerging field. Consistent accurate identification of microplastic polymer composition is vital for understanding the effect of microplastic pollution in the environment. Fourier transform infrared (FT-IR) spectroscopy is becoming commonplace for identifying microplastics. Read More

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http://dx.doi.org/10.1177/0003702820923993DOI Listing

Towards Raman Automation for Microplastics: Developing Strategies for Particle Adhesion and Filter Subsampling.

Appl Spectrosc 2020 Jun 30:3702820922900. Epub 2020 Jun 30.

Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Canada.

Automation and subsampling have been proposed as solutions to reduce the time required to quantify and characterize microplastics in samples using spectroscopy. However, there are methodological dilemmas associated with automation that are preventing its widespread implementation including ensuring particles stay adhered to the filter during filter mapping and developing an appropriate subsampling strategy to reduce the time needed for analysis. We provide a solution to the particle adherence issue by applying Skin Tac, a non-polymeric permeable adhesive that allows microplastic particles to adhere to the filter without having their Raman signal masked by the adhesive. Read More

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http://dx.doi.org/10.1177/0003702820922900DOI Listing

Simplified Ab Initio Molecular Dynamics-Based Raman Spectral Simulations.

Appl Spectrosc 2020 May 18:3702820923392. Epub 2020 May 18.

Physical Sciences Division, Pacific Northwest National Laboratory, Richland, USA.

We describe a simplified approach to simulating Raman spectra from ab initio molecular dynamics (AIMD) calculations. The protocol relies on on-the-fly calculations of approximate molecular polarizabilities using the well-known sum over orbitals (as opposed to states) method. This approach bypasses the more accurate but computationally expensive approach to calculating molecular polarizabilities along AIMD trajectories, i. Read More

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http://dx.doi.org/10.1177/0003702820923392DOI Listing

EXPRESS: Removal of Etalon Features in the Far-Infrared-Terahertz Transmittance Spectra of Thin Polymer Films.

Appl Spectrosc 2020 Apr 8:3702820922295. Epub 2020 Apr 8.

Bundesanstalt für Materialforschung und -prüfung.

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http://dx.doi.org/10.1177/0003702820922295DOI Listing

Microplastics Differ Between Indoor and Outdoor Air Masses: Insights from Multiple Microscopy Methodologies.

Appl Spectrosc 2020 Apr 27:3702820920652. Epub 2020 Apr 27.

Environmental Science and Resource Management Program, California State University Channel Islands, California, USA.

The abundance and distribution of microplastic (<5 mm) has become a growing concern, particularly over the past decade. Research to date has focused on water, soil, and organism matrices but generally disregarded air. We explored airborne microplastic inside and outside of buildings in coastal California by filtering known volumes of air through glass fiber filters, which were then subsequently characterized with a variety of microscopy techniques: gross traditional microscopy, fluorescent microscopy following staining with Nile red, micro-Raman spectroscopy, and micro-Fourier transform infrared (µFT-IR) spectroscopy. Read More

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http://dx.doi.org/10.1177/0003702820920652DOI Listing