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Investigating a Laser-Induced Titanium Plasma Under an Applied Static Electric FieldWe investigate the effect of an applied electric field on the laser-induced titanium plasma for laser induced breakdown spectroscopy (LIBS) for the purpose of assessing electron density with respect to laser energy.
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Evaluation and Development Trends of Optical Detection Technology for Seed VigorIn this article, the basic principles, advantages, and limitations of different optical techniques for obtaining seed vigor estimates are introduced and reviewed, and the key technology of non-destructive optical detection of single seeds will be discussed.
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Real-Time Chemometric Analysis of Multicomponent Bioprocesses Using Raman SpectroscopyIn this study, a glycerol-fed, lab-scale E. coli bioprocess producing representative pharmaceutical compounds was monitored offline with a portable, high-sensitivity Raman spectrometer.
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Optical Constants of Mixed Crude Oil in Visible Waveband Based on the Double-Thickness Transmittance MethodTo study the optical properties of mixed crude oil, the optical constants of samples consisting of two crude oils mixed in different proportions were obtained by the double-thickness transmittance method based on transmittance spectra.
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Fiberoptic Formaldehyde Field Sensors for Industrial Environments: Capitalizing on Evanescent-Wave SpectroscopyAn inexpensive fiberoptic-based formaldehyde field sensor is described for monitoring low-levels of formaldehyde, a widespread indoor air pollutant, based on the principle of evanescent wave absorption of light. Sensor prototypes following that principle are being tested in two plywood board production plants.
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Evaluation and Development Trends of Optical Detection Technology for Seed VigorIn this article, the basic principles, advantages, and limitations of different optical techniques for obtaining seed vigor estimates are introduced and reviewed, and the key technology of non-destructive optical detection of single seeds will be discussed.
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Non-Specific Calibration Combined with Helium Collision Mode for Elemental ScreeningThe ICP–MS mass spectrum contains useful additional information, but how to obtain that information is the question. Here, we provide the answer.
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Botanical Verification with Handheld RamanThis app note demonstrates the effectiveness of utilizing the NanoRam-1064 for analyzing and identifying botanical ingredients while minimizing fluorescence.
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Portable Raman Spectrometers: How Small Can They Get?There is a growing desire among spectroscopists for having instruments small enough to be taken to the sample, as opposed to bringing the sample to the instrument. The result is that Raman spectrometers are becoming more miniaturized. Because these instruments come at a lower cost and offer distinct advantages over traditional spectrometers, the expectation is that a rapid expansion of when these instruments are applied will come forthwith. We offer a preview of how future miniaturized Raman spectrometers might look.
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Specific Recognition Technology of Infrared Absorption Spectra Based on Continuous Wavelet DecompositionIR absorption spectroscopy technology can solve the problem of line aliasing in gas detection. Here, continuous wavelet transform was used in time-frequency analysis to improve spectral component identification and quantitative detection of gases.
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High-Throughput Profiling of Long Chain Fatty Acids and Oxylipins by LC–MSLong chain fatty acids (LCFAs) function as a source of metabolic energy, substrates for membrane biogenesis, and storage of metabolic energy. Oxylipins, oxygenated derivatives of LCFAs, regulate the activity of many cellular processes. Existing methods for the analysis of LCFAs and oxylipins have limited compound coverage and sensitivity that, therefore, prevent their application in biological studies. In this work, we developed a high-throughput LC–MS method for analysis of 51 LCFAs and oxylipins. LCFAs and oxylipins were first extracted from biological samples via solid-phase extraction. The extracted molecules were analyzed by targeted comparative metabolomics. Saturated and monounsaturated LCFAs were analyzed in single ion reaction mode, while polyunsaturated LCFAs and oxylipins were analyzed in multiple reaction monitoring mode. Using this method, we successfully quantified 31 LCFAs and oxylipins from mouse livers.
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Coherent Raman Imaging for Assessing Cutaneous Pharmacokinetics: Advancements and OutlookThis article discusses coherent Raman imaging and how it can visualize and quantify cutaneous pharmacokinetics (PK).
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Prediction of the Size-Dependent Raman Shift of Semiconductor Nanomaterials via Deep LearningA deep learning model for predicting the size-dependent Raman shift of semiconductor nanomaterials was demonstrated and achieved via multi-layer perceptron.
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Tracking Photocuring via ATR-FT-IR with Illumination through the ATR ElementThe utility of the GladiATR diamond ATR, modified with an internal liquid light guide to illuminate the sample from underneath the ATR element, was explored to analyze the photo-polymerization of carbitol acrylate at 405 nm using 1 wt% TPO.
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Technological Analysis of Glazed Tiles Unearthed from Bao’ensi in NanjingUV-Vis-NIR can be used to understand how ancient buildings were constructed. Here, a UV-Vis-NIR and EDXRF spectrophotometer were used to analyze glazed tiles that comprised a historical site built in Ancient China.
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Prediction of the Size-Dependent Raman Shift of Semiconductor Nanomaterials via Deep LearningA deep learning model for predicting the size-dependent Raman shift of semiconductor nanomaterials was demonstrated and achieved via multi-layer perceptron.
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Accurate and Precise Quantification of Arsenic and Selenium in Water and Biological Samples Through the Removal of Doubly Charged Rare Earth Element Interferences by ICP-MSThis month’s column evaluates the capability of inductively coupled plasma–mass spectrometry (ICP-MS) to reduce the impact of doubly charged rare-earth element (REE) interferences on the quantitation of the metalloids, arsenic (As), and selenium (Se) in water and biological matrices.
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How to Select a Laser for Raman Spectroscopy*** Live: Thursday, November 12, 2020 at 9am EST | 2pm GMT | 3pm CET ***Ever wondered what the critical performance parameters are when you are choosing a laser for your Raman spectroscopy experiment? We will discuss these parameters, from the selection of the laser wavelength to the impact of laser linewidth.***On demand available after final airing until Nov. 12, 2021***
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Inductively Coupled Plasma–Mass Spectrometry (ICP-MS) Analysis of Nanomaterials for Use in Nuclear and Material ApplicationsTunable diode laser absorption spectroscopy (TDLAS) is combined with an extreme learning machine (ELM) model, tailored by genetic algorithm (GA) parameter searching, to produce a more robust analytical method for trace gas analysis of ethylene.
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Measurement of Ammonia Leakage by TDLAS in Mid-Infrared Combined with an EMD-SG Filter MethodIn this article, tunable diode laser absorption spectroscopy (TDLAS) is used to measure ammonia leakage, where a new denoising method combining empirical mode decomposition with the Savitzky-Golay smoothing algorithm (EMD-SG) is proposed to improve the signal-to-noise ratio (SNR) of absorbance signals.
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Optimization of a Soil Particle Content Prediction Model Based on a Combined Spectral Index and Successive Projections Algorithm Using Vis-NIR SpectroscopyA rapid vis-NIR spectroscopy method for determining soil particle size and quality.
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Diffraction Grating Masters for Spectroscopy InstrumentationInprentus offers custom-designed blazed diffraction grating masters with rights for replication. A variety of substrate materials and thin film overcoatings are available.
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GC×GC–TOF-MS and Comprehensive Fingerprinting of Volatiles in Food: Capturing the Signature of QualityFood quality differences are dependent on botanical and geographical origins of primary food ingredients as well as storage and handling. Quality assessment for food materials, including cocoa and olive oil, is demonstrated by applying two-dimensional gas chromatography (GC×GC) combined with time-of-flight mass spectrometry (TOF-MS) and pattern recognition.
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Analysis of Deposition Patterns and Influencing Factors of Lithium and Transition Metals Deposited on Lithium Ion Battery Graphitic Anodes by LA-ICP-MSA comprehensive understanding of aging phenomena and the resulting performance loss occurring in lithium-ion batteries (LIBs) is essential for ongoing improvement of the technology. The formation of a uniform solid electrolyte interphase (SEI) is of crucial importance for the performance, lifetime, and safety of LIBs. Transition metal dissolution (TMD), caused by degradation of the cathode, and subsequent TM deposition on the anode surface can deteriorate the protective properties of the SEI, possibly leading to reconstruction of the SEI and loss of active lithium. We explore this topic here.
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In situ Raman Spectroscopy Monitors the Corrosion of Mild Steel in a Salt Fog ChamberIn this study, in situ Raman spectroscopy was used to detect the formation, growth, and evolution of corrosion inside a salt fog chamber. These results pave the way for monitoring the real-time observation of corrosion on metal surfaces.
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Determining Chromium, Iron, and Nickel in a Nickel-Based Alloy by X-ray Fluorescence SpectroscopyAccurate determination of the elemental composition of nickel-based alloys is essential, given their use in high-performance equipment. This XRF technique enables rapid and nondestructive detection, as an alternative to existing approaches.
