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Journal articles on the topic 'THz simultaneous spectroscopy'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Yamaguchi, Masashi, Minfeng Wang, and Pablo Suarez. "TERAHERTZ PHONON-POLARITON IMAGING FOR THE APPLICATION OF CHEMICAL DETECTION." International Journal of High Speed Electronics and Systems 17, no. 02 (2007): 355–65. http://dx.doi.org/10.1142/s0129156407004552.

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A combination of Terahertz (THz) polariton spectroscopy and polariton imaging technique for the application to chemical sensing is presented. We use phonon-polaritons, a coupled oscillation of the lattice vibration and radiation field, as an intense radiation source for THz spectroscopy. The propagation process of the polaritons generated in one of the two LiNbO 3 transducer crystals through the sample sandwiched between the crystals is visualized using a polariton imaging technique. Partially reflected polaritons at the transducer-sample interface and polaritons partially transmitted through

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2

Oishi, Shingo, Yasuto Hijikata, Hiroyuki Yaguchi, and Sadafumi Yoshida. "Simultaneous Determination of the Carrier Concentration, Mobility and Thickness of SiC Homo-Epilayers Using Terahertz Reflectance Spectroscopy." Materials Science Forum 556-557 (September 2007): 423–26. http://dx.doi.org/10.4028/www.scientific.net/msf.556-557.423.

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We have simultaneously determined the carrier concentration, mobility, and thickness of 4H-SiC homo-epilayers with carrier concentration of 1016–1018 cm-3 from reflectance spectroscopy in the wavenumber range of 20–2000 cm-1. The spectra at 20–100 cm-1 and at 80–2000 cm-1 were measured by using the terahertz time domain spectrometer (THz-TDS) and the Fourier-transform infrared (FTIR) spectrometer, respectively. A modified classical dielectric function (MDF) model was employed for the curve fitting. We have compared the values of free carrier concentrations estimated from the reflectance spectr

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Denisov, Grigory, Irina Zotova, Ilya Zheleznov, et al. "Towards Watt-Level THz Sources for High-Resolution Spectroscopy Based on 5th-Harmonic Multiplication in Gyrotrons." Applied Sciences 12, no. 22 (2022): 11370. http://dx.doi.org/10.3390/app122211370.

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We propose the concept of high-power THz radiation sources based on five-fold frequency multiplication in gyrotrons intended for plasma applications. The efficient excitation at the 5th cyclotron harmonic is due to the specific property of the eigenmodes of cylindrical waveguides, as a result of which, the conditions of simultaneous electrodynamic resonance at two selected TE modes are satisfied asymptotically with very high accuracy. Previously, we have verified this principle in experiments with a low-frequency kilowatt-level gyrotron in which, due to the low-density spectrum, the operating

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Ferrante, Carino, Leonardo Lucchesi, Alessia Cemmi, et al. "Gamma Irradiation Effect on Polymeric Chains of Epoxy Adhesive." Polymers 16, no. 9 (2024): 1202. http://dx.doi.org/10.3390/polym16091202.

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The study of materials for space exploration is one of the most interesting targets of international space agencies. An essential tool for realizing light junctions is epoxy adhesive (EA), which provides an elastic and robust material with a complex mesh of polymeric chains and crosslinks. In this work, a study of the structural and chemical modification of a commercial two-part flexible EA (3M™ Scotch-Weld™ EC-2216 B/A Gray), induced by 60Co gamma radiation, is presented. Combining different spectroscopic techniques, such as the spectroscopic Fourier transform infrared spectroscopy (FTIR), th

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Huang, Hsin-hui, Takeshi Nagashima, Tetsu Yonezawa, et al. "Giant Enhancement of THz Wave Emission under Double-Pulse Excitation of Thin Water Flow." Applied Sciences 10, no. 6 (2020): 2031. http://dx.doi.org/10.3390/app10062031.

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Simultaneous measurements of THz wave and hard X-ray emission from thin and flat water flow when irradiated by double femtosecond laser pulses (800 nm, 35 fs/transform-limited, 0.5 kHz, delay times up to 15 ns) were carried out. THz wave measurements by time-domain spectroscopy and X-ray detection by Geiger counters were performed at the transmission and the reflection sides of the flow. THz wave emission spectra show their dynamic peak shifts toward the low frequency with the highest intensity enhancements more than 1.5 × 10 3 times in |E| 2 accumulated over the whole spectrum range of 0–3 TH

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Huang, Hsin-hui, Takeshi Nagashima, Wei-hung Hsu, Saulius Juodkazis, and Koji Hatanaka. "Dual THz Wave and X-ray Generation from a Water Film under Femtosecond Laser Excitation." Nanomaterials 8, no. 7 (2018): 523. http://dx.doi.org/10.3390/nano8070523.

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Simultaneous emission of the THz wave and hard X-ray from thin water free-flow was induced by the irradiation of tightly-focused femtosecond laser pulses (35 fs, 800 nm, 500 Hz) in air. Intensity measurements of the THz wave and X-ray were carried out at the same time with time-domain spectroscopy (TDS) based on electro-optic sampling with a ZnTe(110) crystal and a Geiger counter, respectively. Intensity profiles of the THz wave and X-ray emission as a function of the solution flow position along the incident laser axis at the laser focus show that the profile width of the THz wave is broader

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7

Li, Jiawei, Cong Zhang, Xiaohui Wang, Jinjing Zhang, Hanwen Liu, and Xu Wu. "Terahertz Spectroscopy and Density Functional Theory for Non-Destructive Analysis of Anticoagulant Warfarin." Molecules 30, no. 8 (2025): 1791. https://doi.org/10.3390/molecules30081791.

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Pharmaceutical quality control plays a critical role in safeguarding patient safety and ensuring therapeutic efficacy. However, conventional analytical methods are often hindered by laborious procedures and complex chemical preparation requirements. This study presents a rapid, non-destructive pharmaceutical analysis approach by introducing terahertz spectroscopy for the dual-parametric detection of the anticoagulant warfarin. Characteristic absorption peaks of warfarin within the 4–10 THz range were experimentally identified and theoretically resolved through density functional theory calcula

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8

Gokus, Tobias. "Nano-FTIR Correlation Nanoscopy for Organic and Inorganic Material Analysis." ECS Meeting Abstracts MA2022-01, no. 7 (2022): 622. http://dx.doi.org/10.1149/ma2022-017622mtgabs.

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Significance: Correlation scanning probe techniques to complement nanoscale IR measurements for next generation sample characterization Scattering-type Scanning Near-field Optical Microscopy (s-SNOM) is a scanning probe approach to optical microscopy and spectroscopy, bypassing the ubiquitous diffraction limit of light to achieve a spatial resolution below 20 nanometers. s-SNOM employs the strong confinement of light at the apex of a sharp metallic atomic force microscopy (AFM) tip to create a nanoscale optical hot-spot. Analyzing the scattered light from the tip enables the extraction of the

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9

Lan, Yang, Benjamin J. Dringoli, David A. Valverde-Chávez, et al. "Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite." Science Advances 5, no. 5 (2019): eaaw5558. http://dx.doi.org/10.1126/sciadv.aaw5558.

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Hybrid organic-inorganic halide perovskites have shown remarkable optoelectronic properties, exhibiting an impressive tolerance to defects believed to originate from correlated motion of charge carriers and the polar lattice forming large polarons. Few experimental techniques are capable of directly probing these correlations, requiring simultaneous sub–millielectron volt energy and femtosecond temporal resolution after absorption of a photon. Here, we use time-resolved multi-THz spectroscopy, sensitive to the internal excitations of the polaron, to temporally and energetically resolve the coh

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Viščor, Petr, and Martin Viščor. "Electrical Impedance Spectroscopy: “First Principles” analysis and simulations of electrical response in the classical range of frequencies below 1 THz and the resulting new role of Electrical Impedance Spectroscopy in electrical characterisation within Condensed Matter Physics." Pure and Applied Chemistry 91, no. 11 (2019): 1837–56. http://dx.doi.org/10.1515/pac-2018-1107.

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Abstract In order to investigate the full potential of the Electrical Impedance Spectroscopy (EIS) when used to address various aspects of conductive and dielectric response within the field of Condensed Matter Physics and Electrochemistry, a new analysis of the electrical impedance experiments has been undertaken. Within the framework of quantum mechanical band structure and using the concept of electrochemical potential for each of the relevant energies, the problem of electrical response in condensed phase has been formulated, using augmented Maxwell equations of Classical Electrodynamics,

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11

Grychtol, P., N. Kohlstrunk, J. Buck, et al. "The SXP instrument at the European XFEL." Journal of Physics: Conference Series 2380, no. 1 (2022): 012043. http://dx.doi.org/10.1088/1742-6596/2380/1/012043.

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Abstract The successful implementation of the baseline instruments at the European XFEL has triggered a second phase of instrument developments aiming to extend the portfolio of available techniques. At the soft X-ray undulator (SASE 3), the Soft X-ray Port (SXP) instrument is currently under construction. Conceived as an open port, it focuses primarily on femtosecond time-resolved X-ray photoelectron spectroscopy (TR-XPES), which has proven to be a powerful tool to understand the properties of materials and the interaction between their internal degrees of freedom. The extension of this techn

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12

Tan, Chao, Dongsheng Yang, Saibo Yu, et al. "Effect and Mechanism of High-Pressure Processing: A Case Study of Flue-Cured Tobacco." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 27, no. 7 (2017): 168–81. http://dx.doi.org/10.1515/cttr-2017-0017.

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Summary After a high-pressure processing (HPP) treatment sensory evaluation of flue-cured tobacco showed modifications. There was no significant difference (P > 0.05) between the routine chemical components (total sugar, reducing sugar, nicotine, and total nitrogen) of flue-cured tobacco after high-pressure processing treatment (HPP sample) and that of an untreated control group (CG). An overall judgement, which can be made from the observations of scanning electron microscopy (SEM), X-ray computed microtomography (micro-CT) and transmission electron microscopy (TEM), is that HPP could comp

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13

Pascale, Lise, Marco Truccato, Lorenza Operti, and Angelo Agostino. "Effect of Al and Ca co-doping, in the presence of Te, in superconducting YBCO whiskers growth." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 72, no. 5 (2016): 702–8. http://dx.doi.org/10.1107/s2052520616009823.

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High-Tcsuperconducting cuprates (HTSC) such as YBa2Cu3O7 − x(YBCO) are promising candidates for solid-state THz applications based on stacks of intrinsic Josephson junctions (IJJs) with atomic thickness. In view of future exploitation of IJJs, high-quality superconducting YBCO tape-like single crystals (whiskers) have been synthesized from Ca–Al-doped precursors in the presence of Te. The main aim of this paper is to determine the importance of the simultaneous use of Al, Te and Ca in promoting YBCO whiskers growth with good superconducting properties (Tc= 79–84 K). Further, single-crystal X-r

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14

Chen, Pin, J. C. Pearson, Herbert M. Pickett, Shuji Matsuura та Geoffrey A. Blake. "Measurements of 14NH3 in the ν2=1 state by a solid-state, photomixing, THz spectrometer, and a simultaneous analysis of the microwave, terahertz, and infrared transitions between the ground and ν2 inversion–rotation levels". Journal of Molecular Spectroscopy 236, № 1 (2006): 116–26. http://dx.doi.org/10.1016/j.jms.2006.01.002.

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15

Comodi, Paola, Fabio Cera, Sabrina Nazzareni, and Leonid Dubrovinsky. "Raman spectroscopy of the 10-A phase at simultaneously HP-HT." European Journal of Mineralogy 19, no. 5 (2007): 623–29. http://dx.doi.org/10.1127/0935-1221/2007/0019-1753.

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16

Guo, Quan, Yuan Zhang, Zhihui Lyu, et al. "THz Time-Domain Spectroscopic Ellipsometry With Simultaneous Measurements of Orthogonal Polarizations." IEEE Transactions on Terahertz Science and Technology 9, no. 4 (2019): 422–29. http://dx.doi.org/10.1109/tthz.2019.2921200.

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17

Shimoyama, Yuhei, and Hiroshi Watari. "Multiple Harmonic Electron Paramagnetic Resonance Spectroscopy by Simultaneous Detection." Applied Spectroscopy 43, no. 6 (1989): 1021–26. http://dx.doi.org/10.1366/0003702894203840.

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A simultaneous measurement method was developed to permit the multiple detection of the first- and second-order harmonic displays of electron paramagnetic resonance (EPR) spectra. Application of integration and differentiation of amplitude and phase simultaneously, i.e., vector operations on the various displays, enables identification of signals expressed by the various harmonics. By using simultaneous detection, we found for the first time that signals indicated by the different displays are not always identical. The transformation from the first to the second harmonic displays (or vice vers

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18

Caliebe, Wolfgang A., Aleksandr Kalinko, Marc Viehweger, et al. "The New OperandoCat Beamline P63 at PETRA III." Journal of Physics: Conference Series 3010, no. 1 (2025): 012168. https://doi.org/10.1088/1742-6596/3010/1/012168.

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Abstract A new beamline will be installed at the last empty straight section at PETRA III. It is dedicated to investigate materials quasi-simultaneously under operando conditions with different complementary methods, which are based on synchrotron radiation like X-ray absorption spectroscopy, X-ray diffraction, small angle X-ray scattering and X-ray emission spectroscopy, but also rather lab-based methods like Raman-, Infra-Red, and UV/vis-spectroscopy in addition to macroscopic methods like mass-spectroscopy. In light of the future upgrade of the PETRA III storage ring to a new machine, an up

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19

Finger, Raphael, Thomas C. Hansen, and Holger Kohlmann. "Simultaneous neutron powder diffraction and Raman spectroscopy – an approach of combining two complementary techniques." Zeitschrift für Kristallographie - Crystalline Materials 236, no. 11-12 (2021): 325–28. http://dx.doi.org/10.1515/zkri-2021-2051.

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Abstract Diffraction techniques are well-established methods for crystal structure determination as well as phase identification and quantification. Raman spectroscopy can be a valuable complementary characterization technique, because in contrast to the former it yields also information on amorphous materials and it is a probe for short-range structural effects. The herein presented setup allows for simultaneous neutron diffraction and Raman spectroscopy, shown with a sample of lead sulfate under ambient conditions as a proof of principle. In order to fulfil requirements of both methods, a sa

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20

Ciavarella, Susan, Graeme D. Batten, and Anthony B. Blakeney. "Measuring Potassium in Plant Tissues Using near Infrared Spectroscopy." Journal of Near Infrared Spectroscopy 6, A (1998): A63—A66. http://dx.doi.org/10.1255/jnirs.167.

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Near infrared (NIR) spectroscopy is routinely used to determine constituents with organic bonds which absorb electromagnetic radiation in the region 1100 to 2500 nm. The nitrogen fertilizer requirements of cereal crops are determined from the analysis of vegetative samples by NIR spectroscopy. Simultaneous determination of other plant-essential elements would enhance the value of the analysis. Compared to nitrogen, other essential elements are either present at a lower concentration in the tissue or present largely in an inorganic form which is not detectable by NIR spectroscopy. In this paper

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21

Rameshan, Raffael, Andreas Nenning, Johannes Raschhofer, et al. "Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy." Crystals 10, no. 10 (2020): 947. http://dx.doi.org/10.3390/cryst10100947.

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For an in-depth characterization of catalytic materials and their properties, spectroscopic in-situ (operando) investigations are indispensable. With the rapid development of advanced commercial spectroscopic equipment, it is possible to combine complementary methods in a single system. This allows for simultaneously gaining insights into surface and bulk properties of functional oxides, such as defect chemistry, catalytic characteristics, electronic structure, etc., enabling a direct correlation of structure and reactivity of catalyst materials, thus facilitating effective catalyst developmen

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22

Tarach, Karolina A., Anna K. Walczyk, Agata Kordek, Oliwia Rogala, and Kinga Góra-Marek. "Silver-Loaded Chabazite in Ethanol-to-Hydrocarbon Process—Operando FT-IR and UV-Vis Spectroscopic Studies." Molecules 29, no. 6 (2024): 1207. http://dx.doi.org/10.3390/molecules29061207.

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The ethanol dehydration process is studied regarding protonic and Ag-loaded chabazite zeolite in advanced FT-IR and UV-vis operando spectroscopic studies with simultaneous mass spectroscopy and gas chromatography analyses of products. The spectroscopic investigation provides information on the species formed on the surface of catalysts, while mass spectrometry and gas chromatography methods identify the desorbed products. These studies are also supported by spectroscopic, chromatographic, and thermogravimetric analyses of coke species formed over the catalyst’s surface during ethanol conversio

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23

Lun, Zhichen, Xiaohong Wu, Jiajun Dong, and Bin Wu. "Deep Learning-Enhanced Spectroscopic Technologies for Food Quality Assessment: Convergence and Emerging Frontiers." Foods 14, no. 13 (2025): 2350. https://doi.org/10.3390/foods14132350.

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Nowadays, the development of the food industry and economic recovery have driven escalating consumer demands for high-quality, nutritious, and safe food products, and spectroscopic technologies are increasingly prominent as essential tools for food quality inspection. Concurrently, the rapid rise of artificial intelligence (AI) has created new opportunities for food quality detection. As a critical branch of AI, deep learning synergizes with spectroscopic technologies to enhance spectral data processing accuracy, enable real-time decision making, and address challenges from complex matrices an

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24

Janot-Pacheco, Eduardo, and Nelson Vani Leister. "Seismology of southern Be stars." Symposium - International Astronomical Union 162 (1994): 104–5. http://dx.doi.org/10.1017/s0074180900214630.

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We have started in 1990 a search for moving bumps in the HeI λ 667.8 nm of mainly southern, bright Be stars. The objects of our sample have been selected on the basis of photometric variability (Cuypers et al., 1989). High resolution (R≥ 30,000), high signal-to-noise ratio (S/R≥ 300) spectroscopic observations have been performed at the brazilian Laboratório Nacional de Astrofísica with a CCD camera attached to the coudé spectrograph of the 1.60 m telescope (e.g. Table I). Several hundred spectra have been taken during the last three years. Photometric observations simultaneous with spectrosco

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Prajapati, Krishna V., Hasumati A. Raj, Vineet C. Jain, and Neelam S. Prajapati. "SIMULTANEOUS DETERMINATION OF MESALAZINE AND RIFAXIMIN IN SYNTHETIC MIXTURE USING SPECTROPHOTOMETRIC TECHNIQUE (SIMULTANEOUS EQUATION METHOD)." Pharmaceutical and Biological Evaluations 3, no. 2 (2016): 199–207. https://doi.org/10.5281/zenodo.51062.

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Objective: A simple, accurate and precise spectroscopic method was developed for simultaneous estimation of Mesalazine and Rifaximin in synthetic mixture using Simultaneous Equation Method. Objective of the study was to deliver information related to Mesalazine and Rifaximin combination’s analytical method. Methods: The absorbance was measured at 328 nm for Mesalazine and 292 nm for Rifaximin and calibration curves were plotted as absorbance versus concentration, respectively. The method was found to be linear (r<sup>2</sup>> 0.999) in the range of 10-50 μg/ml for Mesalazine at 328

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Thyrhaug, Erling, Stefan Krause, Antonio Perri, et al. "Single-molecule excitation–emission spectroscopy." Proceedings of the National Academy of Sciences 116, no. 10 (2019): 4064–69. http://dx.doi.org/10.1073/pnas.1808290116.

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Single-molecule spectroscopy (SMS) provides a detailed view of individual emitter properties and local environments without having to resort to ensemble averaging. While the last several decades have seen substantial refinement of SMS techniques, recording excitation spectra of single emitters still poses a significant challenge. Here we address this problem by demonstrating simultaneous collection of fluorescence emission and excitation spectra using a compact common-path interferometer and broadband excitation, which is implemented as an extension of a standard SMS microscope. We demonstrate

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27

Li, Kexin, Mouhui Yan, Yukun Jin, et al. "Dual character of the insulating state in the van der Waals Fe{1-x}Ni{x}PS{3} alloyed compounds." J. Phys. Chem. Lett. 14 (December 26, 2022): 57–65. https://doi.org/10.1021/acs.jpclett.2c03492.

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The electronic structure of the alloyed transition-metal phosphorus trichalcogenide van der Waals Fe<sub>1-<em>x</em></sub>Ni<sub>x</sub>PS<sub>3</sub> compounds is studied using X-ray absorption spectroscopy and resonant photoelectron spectroscopy combined with intensive density functional theory calculations. Our systematic spectroscopic and theoretical data demonstrate the strong localization of the Fe- and Ni-ions-derived electronic states that leads to the description of the spectroscopic data as belonging simultaneously to Mott-Hubbard and charge-transfer insulators. These findings

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Hoffmann, U., F. Pfeifer, S. Okretic, N. Völkl, M. Zahedi, and H. W. Siesler. "Rheo-Optical Fourier Transform Infrared and Raman Spectroscopy of Polymers." Applied Spectroscopy 47, no. 9 (1993): 1531–39. http://dx.doi.org/10.1366/0003702934067333.

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This article is intended to review recent results of simultaneous mechanical and Fourier transform infrared spectroscopic—so-called rheo-optical—measurements for polymer deformation studies. The technique will also be discussed in terms of the application of Fourier transform near-infrared light-fiber and Raman spectroscopy. Specifically, data on the bidirectional drawing of poly(ethylene terephthalate) and the strain-induced conformational changes of poly(vinylidene fluoride) will be presented.

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Velinov, Nena, Milica Petrović, Miljana Radović Vučić, et al. "Characterization and application of wood-ZrO2 sorbent for simultaneous removal of chromium (III) and chromium (VI) from binary mixture." Nordic Pulp & Paper Research Journal 36, no. 2 (2021): 373–85. http://dx.doi.org/10.1515/npprj-2020-0082.

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Abstract A new woodchips-ZrO2 biosorbent (W-ZrO2) was synthesized using wood residue material generated from the oak tree (Quercus robur) during furniture manufacturing. Biosorbent was tested for the simultaneous removal of both chromium (Cr) ions: Cr(III) and Cr(VI), in the binary component solution. Biosorbent characterization was performed by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD). To define optimal process parameters for simultaneous removal of both Cr species, eff

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Arévalo, Laura A., Stephen A. O’Brien, Eneko Lopez, Gajendra Pratap Singh, and Andreas Seifert. "Design and Development of a Bimodal Optical Instrument for Simultaneous Vibrational Spectroscopy Measurements." International Journal of Molecular Sciences 23, no. 12 (2022): 6834. http://dx.doi.org/10.3390/ijms23126834.

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Vibrational spectroscopy techniques are widely used in analytical chemistry, physics and biology. The most prominent techniques are Raman and Fourier-transform infrared spectroscopy (FTIR). Combining both techniques delivers complementary information of the test sample. We present the design, construction, and calibration of a novel bimodal spectroscopy system featuring both Raman and infrared measurements simultaneously on the same sample without mutual interference. The optomechanical design provides a modular flexible system for solid and liquid samples and different configurations for Rama

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Chen, Tingfei, Chao Liu, Xiaojun Liu, Chunnan Zhu, and Dongyun Zheng. "Simultaneous Electrochemical Detection of Catechol and Hydroquinone Based on a Carbon Nanotube Paste Electrode Modified with Electro-Reduced Graphene Oxide." International Journal of Molecular Sciences 25, no. 18 (2024): 9829. http://dx.doi.org/10.3390/ijms25189829.

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Effectively detecting catechol (CC) and hydroquinone (HQ) simultaneously is crucial for environmental protection and human health monitoring. In the study presented herein, a novel electrochemical sensor for the sensitive simultaneous detection of CC and HQ was constructed based on an electrochemically reduced graphene oxide (ERGO)-modified multi-walled carbon nanotube paste electrode (MWCNTPE). Scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy and electrochemical techniques were utilized to characterize the sensing interface and investigate the sensing mechani

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Culaba, I. B., J. T. Maquiling, and R. M. delos Santos. "Fabrication and applications of a novel and multi-feature spectroscope." Journal of Physics: Conference Series 2611, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1742-6596/2611/1/012012.

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Abstract A spectroscope is an optical device that can stimulate student’s interest in the visible light’s constituent colors. This educational tool is conventionally used to qualitatively observe the emission spectra of various light sources, which can serve as a springboard to understanding the fundamentals of spectroscopy, the wave nature of light, and the orbital theory of atoms and molecules. This research builds on the functionality and accessibility of a simple spectroscope through the utilization of low-cost readily available materials, and more importantly, improvisation via the inclus

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Domes, Christian, Timea Frosch, Juergen Popp, and Torsten Frosch. "Rapid Raman Spectroscopic Analysis of Stress Induced Degradation of the Pharmaceutical Drug Tetracycline." Molecules 25, no. 8 (2020): 1866. http://dx.doi.org/10.3390/molecules25081866.

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Stress factors caused by inadequate storage can induce the unwanted degradation of active compounds in pharmaceutical formulations. Resonance Raman spectroscopy is presented as an analytical tool for rapid monitoring of small concentration changes of tetracycline and the metabolite 4˗epianhydrotetracycline. These degradation processes were experimentally induced by changes in temperature, humidity, and irradiation with visible light over a time period of up to 23 days. The excitation wavelength λexc = 413 nm was proven to provide short acquisition times for the simultaneous Raman spectroscopic

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Lewis, E. N., L. H. Kidder, and I. W. Levin. "High Spatial and High Spectral Resolution FTIR Spectroscopic Imaging of Biological Materials." Microscopy and Microanalysis 3, S2 (1997): 831–32. http://dx.doi.org/10.1017/s1431927600011041.

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Infrared spectroscopy has been used to probe a variety of biological systems including for example, the determination of diseased states and the investigation of foreign inclusions in biologicals. The technique generates qualitative and quantitative information on the structure and dynamics of samples, including lipids, proteins, and non-biological constituents. The coupling of imaging modalities with spectroscopic techniques adds a new dimension to sample analysis in both the spectroscopic and spatial domains. Using a spectroscopic imaging system that incorporates a step-scan interferometer,

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Neil Lewis, E., Abigail S. Haka, Pina Colarusso, Ira W. Levin, John Gillespie, and Linda H. Kidder. "Evaluation Of Diseased State In Human Tissue Sections Using Infrared And Raman Imaging Microspectroscopy." Microscopy and Microanalysis 5, S2 (1999): 60–61. http://dx.doi.org/10.1017/s1431927600013623.

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Optical microscopy has been the workhorse pathological technique, qualitatively differentiating tissue sections by characterizing morphological variations. Vibrational spectroscopic techniques provide quantitative as well as qualitative analytical information that reflects a sample’s biochemical composition and molecular structure. The utility of infrared and Raman techniques for biological characterization has been demonstrated for a variety of applications.[1-4]FTIR imaging microscopy is a newly developed technique that incorporates the imaging capabilities required for histological procedur

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Tripti, Shukla, Prakash Pandey Sharad, and Upmanyu Neeraj. "Simultaneous estimation of thiocolchicoside and ketorolac tromethamine using UV spectroscopy." Journal of Indian Chemical Society Vol. 96, Feb 2019 (2019): 305–10. https://doi.org/10.5281/zenodo.5651969.

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School of Pharmacy and Research, Peoples University, Bhopal-462 037, Madhya Pradesh, India <em>E-mail</em>: triptishuklapip@gmail.com Department of Pharmacy, Shri Govindram Seksaria Institute of Technology and Science, Indore-452 003, Madhya Pradesh, India <em>Manuscript received online 20 August 2018, revised 28 December 2018, accepted 14 January 2019</em> Thiocolchicoside and ketorolac are potent anti-inflammatory and pain relieving agents. They impart synergistic action when delivered in combination. In the present study a simple accurate, precised and sensitive method was developed for the

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Mehta, Pratik S., Pratik R. Patel, Rajesh R. Parmar, M. M. K. Modasiya, and Dushyant A. Shah. "Development and Validation of Derivative Spectroscopic Method for Simultaneous Estimation of Cefadroxil and Probenecid." International Journal of Pharmaceutical Sciences and Nanotechnology 7, no. 1 (2014): 2350–55. http://dx.doi.org/10.37285/ijpsn.2014.7.1.6.

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A novel, simple, accurate, sensitive, precise and economical derivative spectroscopic method was developed and validated for the determination of cefadroxil and probenecid in synthetic mixture. First order derivative spectroscopy method was adopted to eliminate spectral interference. The method obeys Beer’s Law in concentration ranges of 4-36 μg/ml for cefadroxil and of 5-25 μg/ml of probenecid. The zero crossing point for cefadroxil and probenecid was 260 nm and 237.8 nm respectively in 0.1N HCl. The method was validated in terms of accuracy, precision, linearity, limits of detection, limits

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Delli Santi, Maria Giulia, Salvatore Castrignano, Marialuisa Capezzuto, et al. "Optrode-Assisted Multiparametric Near-Infrared Spectroscopy for the Analysis of Liquids." Sensors 24, no. 3 (2024): 729. http://dx.doi.org/10.3390/s24030729.

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We demonstrate a sensing scheme for liquid analytes that integrates multiple optical fiber sensors in a near-infrared spectrometer. With a simple optofluidic method, a broadband radiation is encoded in a time-domain interferogram and distributed to different sensing units that interrogate the sample simultaneously; the spectral readout of each unit is extracted from its output signal by a Fourier transform routine. The proposed method allows performing a multiparametric analysis of liquid samples in a compact setup where the radiation source, measurement units, and spectral readout are all int

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Winterauer, Dominik J., Daniel Funes-Hernando, Jean-Luc Duvail, Saïd Moussaoui, Tim Batten, and Bernard Humbert. "Nanoscale Spatial Resolution in Far-Field Raman Imaging Using Hyperspectral Unmixing in Combination with Positivity Constrained Super-Resolution." Applied Spectroscopy 74, no. 7 (2020): 780–90. http://dx.doi.org/10.1177/0003702820920688.

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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. Here, we demonstrate an achieved resolution of better than 14 nm, a more than eightfold improvement on single-channel image-based SRIR and [Formula:

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Pelletier, Isabelle, Christian Pellerin, D. Bruce Chase, and John F. Rabolt. "New Developments in Planar Array Infrared Spectroscopy." Applied Spectroscopy 59, no. 2 (2005): 156–63. http://dx.doi.org/10.1366/0003702053085043.

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A planar array infrared (PA-IR) spectrograph offers several advantages over other infrared approaches, including high acquisition rate and sensitivity. However, it suffers from some important drawbacks, such as a limited spectral range and a significant curvature of the recorded spectral images, which still need to be addressed. In this article, we present new developments in PA-IR spectroscopy that overcome these drawbacks. First, a data processing method for the correction of the curvature observed in the spectral images has been developed and refined. In addition, a dual-beam instrument tha

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Harju, Mauno E. E. "Solid-State Transition Mechanisms of Ammonium Nitrate Phases IV, III, and II Investigated by Simultaneous Raman Spectrometry and Differential Scanning Calorimetry." Applied Spectroscopy 47, no. 11 (1993): 1926–30. http://dx.doi.org/10.1366/0003702934066127.

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The solid-state transition mechanisms of ammonium nitrate IV, III, and II were studied by measuring samples simultaneously by Raman spectrometry and differential scanning calorimetry (DSC). The Raman instruments were a Fourier transform Raman spectrophotometer and triple monochromator Raman spectrophotometer with charge-coupled-device (CCD) detector. The spectral data of the transitions were collected simultaneously with the calorimetric data in the temperature-scanning mode of the calorimeter and then isothermally between transitions. The phase transition from phase IV to phase III occurred t

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Gies, D. R., and David McDavid. "Simultaneous Spectroscopy and Polarimetry of Be Stars." International Astronomical Union Colloquium 92 (August 1987): 84–86. http://dx.doi.org/10.1017/s0252921100116069.

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Evidence is now accumulating that many Be stars display photospheric line profile variations on timescales of days or less that are probably caused by nonradial pulsations (Baade 1984; Penrod 1986). In some circumstances these pulsations can promote mass loss into the circumstellar envelope, and consequently the conditions in the inner part of the envelope may vary on similar timescales. Changes in the envelope could produce variations in the polarization and emission line profiles, and observers have reported rapid variability in both. We describe here an initial attempt to search for simulta

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Sai, datri A., rao A. Lakshmana, B. Ramnadh, devi B. Valli, lakshmi CH Dhana, and CH Vikas. "Simultaneous estimation of naltrexone and bupropion in pharmaceutical dosage form by using UV spectroscopy." World Journal of Biology Pharmacy and Health Sciences 1, no. 1 (2020): 033–41. https://doi.org/10.5281/zenodo.4430205.

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A sensitive and validated method has been developed for simultaneous estimation of Naltrexone and Bupropion in pharmaceutical dosage form by using UV Spectroscopy, without prior separation, by four different techniques (Simultaneous Equation, Absorbance Ratio method, Dual Wavelength Method and Derivative Spectroscopic Method).  The work was carried out on Shimadzu electron UV1800 double beam UV-Visible spectrophotometer. The absorption spectra of reference and test solutions were carried out in 1 cm matched quartz cell over the range of 200 - 400 nm. The linearity ranges for Naltrexone an

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Brangule, Agnese, Kārlis Gross, Ingus Skadiņš, Aigars Reinis, and Juta Kroiča. "Simultaneous Identification of Amorphous Calcium Phosphate and S.epidermidis Bacteria by Photoacoustic Spectroscopy." Key Engineering Materials 720 (November 2016): 125–29. http://dx.doi.org/10.4028/www.scientific.net/kem.720.125.

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The incorporation of biomaterials in human tissue requires methods to study the interface of the implant with the biological setting. We set out to study whether Photoacoustic spectroscopy with a higher level of sensitivity from the cantilever detector could simultaneously detect amorphous calcium phosphate and the bacteria. The calcium phosphate was synthesized, pressed into tablets, and then immersed in a solution containing S.epidermidis bacteria. Spectra were recorded after 1, 2, 3, 4 and 5 days. Deconvolution of the spectra at different time periods was able to separate bands belonging to

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Franko, Mladen, and Chieu D. Tran. "Simultaneous Determination of Two-Component Mixtures and pHs by Dual-Wavelength Thermal Lens Spectrometry." Applied Spectroscopy 43, no. 4 (1989): 661–68. http://dx.doi.org/10.1366/0003702894202463.

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The recently developed dual-wavelength thermal lens spectrometer, which is capable of simultaneously measuring thermal lens signals at two different wavelengths, has been used to simultaneously determine two-component samples and solution pHs. Compared to conventional absorption spectrophotometry, this dual-wavelength technique offers advantages that include fast data acquisition and higher sensitivity. With the use of 20-mW excitation beams, the limits of detection for the simultaneous determination of ferroin and iron(II) bipyridyl complexes mixtures are estimated to be 3.6 × 10−9 M and 8.4

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M. Patel, Shivani, and Lalit L. Jha. "SIMULTANEOUS UV METHOD DEVELOPMENT FOR DETERMINATION OF ROTIGOTINE HYDROCHLORIDE AND RASAGILINE MESYLATE." Indian Drugs 60, no. 05 (2023): 73–79. http://dx.doi.org/10.53879/id.60.05.13373.

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A precise, accurate analytical UV spectroscopic method has been developed for simultaneous estimation of rotigotine hydrochloride and rasagiline mesylate by using first order derivative spectroscopy. 50 µg mL-1 solutions of both drugs were scanned in the range of 200-800 nm and the first order overlain spectra of both drugs to check zero crossing points. Rotigotine hydrochloride showed zero crossing point at 239 nm where and rasagiline mesylate showed at 273 nm. Six-point calibration curves shown linearity in 2-12 µg mL-1 concentration range for rotigotine hydrochloride and 10-60 µg mL-1 conce

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Lafouresse, M. C., U. Bertocci, C. R. Beauchamp, and G. R. Stafford. "Simultaneous Electrochemical and Mechanical Impedance Spectroscopy Using Cantilever Curvature." Journal of The Electrochemical Society 159, no. 10 (2012): H816—H822. http://dx.doi.org/10.1149/2.055210jes.

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Drabik, Jolanta, Rafał Kozdrach, and Edyta Osuch-Słomka. "EFFECT OF THE BIO-LUBRICANT ON THE LUBRICATINGPROPERTIES AND SURFACE OF THE FRICTION ZONE." Tribologia 306, no. 4 (2024): 7–13. http://dx.doi.org/10.5604/01.3001.0054.3931.

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Tests carried out on a rotational rheometer with a tribological cell enabled the simultaneous designation oflubricating and viscosity characteristics depending on temperature and load as a function of variable slidingspeed. The analysis of the dependence of the coefficient of friction on the sliding speed provided the basis forevaluating the effectiveness of lubrication of steel tribosystems with bio-lubricants. Spectroscopic methodswere used to monitor changes in the microstructure of the bio-lubricants after tests. The scanning electronmicroscopy (SEM) and energy dispersive spectroscopy (EDS

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Wei, Qianhe, Bincheng Li, Jing Wang, Binxing Zhao, and Ping Yang. "Impact of Residual Water Vapor on the Simultaneous Measurements of Trace CH4 and N2O in Air with Cavity Ring-Down Spectroscopy." Atmosphere 12, no. 2 (2021): 221. http://dx.doi.org/10.3390/atmos12020221.

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Methane (CH4) and nitrous oxide (N2O) are among the most important atmospheric greenhouse gases. A gas sensor based on a tunable 7.6 μm continuous-wave external-cavity mode-hop-free (EC-MHF) quantum cascade laser (from 1290 to 1350 cm−1) cavity ring-down spectroscopy (CRDS) technique was developed for the simultaneous detection of CH4 and N2O in ambient air with water vapor (H2O) mostly removed via molecular sieve drying to minimize the impact of H2O on the simultaneous measurements. Still, due to the broad and strong absorption spectrum of H2O in the entire mid-infrared (mid-IR) spectral rang

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Krstić, Marko, and Slavica Ražić. "Analytical Approaches to the Characterization of Solid Drug Delivery Systems with Porous Adsorbent Carriers." Current Medicinal Chemistry 25, no. 33 (2018): 3956–72. http://dx.doi.org/10.2174/0929867325666180212120908.

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A large variety of analytical techniques are available to meet the needs of characterization of solid samples. But, when solid drug delivery systems are concerned we are faced with demanding methodologies which have to compile capabilities of analytical techniques in regard to large diversity of structures and surface functionality of analyzed adsorbent carriers. In this review, the most commonly used analytical techniques are presented with their basic principles, advantages and disadvantages in applications of interest. Adsorbent carriers are widely used today as ingredients in the formulati

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