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Evaluation of Sample Preparation Methods for the Classification of Children’s Ca–Fe–Zn Oral Liquid by Libs J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-08 Weiping Xie, Gangrong Fu, Jiang Xu, Min Zeng, Qi Wan, Xiaoying Yao, Ping Yang, Mingyin Yao
Different manufacturers do not produce the same quality of children’s Ca–Fe–Zn oral liquid due to different production materials and processes. To improve the phenomenon of counterfeit and imitation oral liquid on the market and effectively monitor its quality, laser-induced breakdown spectroscopy (LIBS) fingerprinting with sample preparation methods can provide a tool for real-time and rapid detection
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Influence of Frequency Chirp and Axial Magnetic Field on Electron Acceleration by Employing cos2 Laser Pulse Envelope in Vacuum J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-08 A. K. Pramanik, J. Rajput
Employment of an external magnetic field on a frequency-chirped cos2 laser pulse envelope for effective electron acceleration is studied. After the electron interacts with the laser pulse, the frequency chirp influences the electron dynamics, betatron resonance, and energy gain of the electron, ensuring effective acceleration of the electron with significant energy gain in the order of GeV. If a suitable
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Spectrophotometric Method for Determination of Cu(II) Using a New Schiff Base Ligand J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-08
The Cu(II) was found using a quick and uncomplicated procedure that involved reacting it with a freshly synthesized ligand to create an orange complex that had an absorbance peak of 481.5 nm in an acidic solution. The best conditions for the formation of the complex were studied from the concentration of the ligand, medium, the effect of the addition sequence, the effect of temperature, and the time
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Hydrocortisone UV-Vis Spectrophotometric Study: Stability, Determination of Its Acidity Constants and Quantification J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-08 G. M. Ramos-Reyes, S. Corona-Avendaño, M. T. Ramírez-Silva, M. Romero-Romo, M. Palomar-Pardavé
Hydrocortisone is a glucocorticoid-type hormone produced naturally by the organism, such that it maintains the body functional during physical or mental stress episodes. The present work focuses on the UV-Vis spectrophotometric assessment of the chemical stability of hydrocortisone in an aqueous medium during the time of analysis, determination of its acidity constants through a robust methodology
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Rapid Discrimination of Cervical Cancer from Hysteromyoma Using Label-Free Serum RNA Based on Surface-Enhanced Raman Spectroscopy and AdaBoost Algorithm J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-08
We investigated the feasibility of using surface-enhanced Raman scattering (SERS) technology combined with the AdaBoost algorithm to rapidly discriminate cervical cancer patients from hysteromyoma patients. Using Au colloids as the SERS active substrate, we recorded Raman signal measurements on serum RNA samples obtained from 35 patients diagnosed with cervical cancer and 30 patients diagnosed with
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Chemical Synthesis of Cobalt Nanowires in an External Magnetic Field and Their Characterization by NMR J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 G. I. Mamniashvili, T. O. Gegechkori, T. I. Zedginidze, T. G. Petriashvili, M. V. Janjalia, T. A. Gavasheli, R. Ya. Kezerashvili
The possibility of measuring the degree of fixing (pinning force) of domain walls in cobalt nanowires by the NMR spin-echo method under the action of an additional magnetic video-pulse on a two-pulse echo is demonstrated. This method can be used for NMR estimation of the pinning force of domain walls and the coercive force of cobalt nanowires to optimize their chemical synthesis in an external magnetic
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Possibility of Forming Perfect Vortices from Bessel–Gaussian Beams J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 V. N. Belyi, S. N. Kurilkina, N. A. Khilo
Expressions are obtained for the position of the maximum Imax of the Fourier transform of a Bessel–Gaussian beam (BGB) and its dependence on the topological charge is substantiated. It is found that Imax depends on the angle of the cone and the parameters of the Gaussian beam. Here, as the cone angle is reduced (and, therefore, the diffraction-free region increases), the distances between the maxima
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Single-Bubble Sonoluminescence as a New Technique for Determination of Metals in Mineral Water J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 B. M. Gareev, G. L. Sharipov
The use of sonoluminescent spectroscopy to determine the content of Na, K, Mg, and Ca in mineral waters is examined. The procedure for preparation of samples of mineral waters for spectral analysis and recording the analytical luminescence spectra is described. For the first time single-bubble sonoluminescence spectra with a resolution of Δλ = 1 nm in bubble motion mode (SBSL-MM) were obtained for
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Nonlinear Absorption of Terahertz Radiation by Free Charge Carriers in Polar Semiconductors J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 V. L. Malevich
An analytical formula is obtained for the absorption coefficient of intense terahertz radiation by free electrons in a semiconductor when the main mechanism of electron scattering is spontaneous emission of polar optical phonons. The absorption coefficient is shown to increase sharply when the average energy of electron oscillations in the terahertz field exceeds the optical phonon energy.
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Remote Recognition of Materials Using Laser Photothermal Radiometry J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 P. I. Abramov, E. V. Kuznetsov, L. A. Skvortsov, M. I. Skvortsova
The feasibility of recognizing opaque materials in remote objects using pulsed laser photothermal radiometry with prolonged pulsed exposure is examined. Theoretical calculations are given of the range of recognition of materials with laser activation of their surfaces. The computational results indicate a significant influence of thermal parameters on recognition range. It is shown experimentally that
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Diode Laser Frequency Stabilities Obtained by Frequency and Zeeman Modulation Methods J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 Ersoy Şahin
The extended cavity diode lasers were stabilized using the first and third derivatives obtained by the frequency modulation method from the hyperfine resonances of the 87Rb D2 transition line. The frequency stability values were measured as 3.1 × 10-12, 5.6 × 10-13, and 1.9 × 10-12 for integration times of 1, 102, and 104 s, respectively, using the first derivatives of F=1 → F′=1 and F=1 → F′=2 resonances
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Development and Validation of the UV-Spectrophotometric Method for the Determination of Cordycepin, a Nucleoside J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 Kondapalli Vamsi Krishna, Jyothis Devasia, Alok Malaviya
The primary, bioactive component of Cordyceps militaris, known as cordycepin (3'-deoxyadenosine), has been utilized extensively as a traditional medicinal ingredient and a nutritious diet in Asian nations. To determine the amount of cordycepin in the C. militaris, high-performance liquid chromatography (HPLC) is shown to be an effective, sensitive, and straightforward analytical technique. Other methods
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Luminescence of Dye Molecules in Polymer Films with Plasmonic Nanoparticles J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07
The effect of plasmonic nanoparticles (NPs) on the fluorescence and phosphorescence intensity of organic dye molecules was studied theoretically and experimentally. A theoretical model that takes into account nonradiative transfer of excitation energy from a molecule to an NP and the changes in the rates of spontaneous emission and light absorption by a molecule near an NP was proposed to calculate
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Effect of Spheroidal Magnetized Nanoparticles on the Luminescence of Quantum Dots J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 M. G. Kucherenko, V. M. Nalbandyan
A spectral model is constructed for the luminescence of a two-component exciton-activated quantum dot (QD)–spheroidal plasmon nanoparticle (NP) system in a homogeneous external magnetic field in the approximation of a dipole electric polarizability tensor of the nanoparticle with dissipation of the exciton energy in the NP taken into account. A tensor representation of the dielectric permeability of
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Assessment of the Stiffness of Small Arterial Vessels of Superficial Biotissues and Their Spectral-Temporal Diffuse Light Reflection Profiles J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 V. A. Firago
The development of an operational noninvasive technique for assessing the state of the microcirculatory blood vessels in the cardiovascular system is a promising direction for the creation of equipment for the differential diagnosis of the causes of vascular dystonia and arterial hypertension. The feasibility of using diffuse reflection spectroscopy to determine the major parameters of the microvasculature
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Synthesis, Structural, and Photoluminescence Studies of Tb3+ Activated Y2SiO5 Phosphor for Display Devices J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 Vikas Mishra, Sudhakar Singh, Vikas Dubey, Dhirendra Singh Kshatri, Pragati Patharia, Neha Dubey, M. C. Rao
The synthesis and luminescence analysis of Tb3+-activated phosphors were reported. Y2SiO5 phosphors were synthesized by a modified solid-state reaction method with a variable doping concentration of Tb3+ ion (0.5–2.5 mol.%). As synthesized, the phosphors were characterized by X-ray diffraction (XRD) analysis. The XRD pattern confirmed the monoclinic structure of the prepared phosphor. Scanning electron
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Effect of Technogenic Hydrocarbons on Chlorophyll a Variable Fluorescence Parameters in Leaves of Deciduous Plant Seedlings J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 E. G. Tulkova, G. E. Savchenko, L. F. Kabashnikova
The effects of technogenic hydrocarbons (benzo[α]pyrene, butyl acetate, and o-xylene) on the state of stress-sensitive photosystem II in leaves of seedlings of silver birch (Betula pendula Roth.), small-leaved linden (Tilia cordata Mill.), Norway maple (Acer platanoides L.), and little-leaf poplar (Populus pyramidalis Roz.) were assessed by pulse–amplitude-modulated (PAM) fluorimetry. The degree of
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Comparative Study on Calibration Models Using NIR Spectroscopy Data J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 Ning Pan, Zhixin Yu, Wei Ling, Jie Xu, Yumei Liao
The quality of pork is largely influenced by moisture, fat, and protein. In the meat industry, the establishment of a fast and accurate prediction system is always welcomed. Near infrared spectroscopy (NIRS) can satisfy the requirements of the evaluation. An automatic routine based on support vector regression (SVR), a backpropagation neural network (BPNN), and principal component analysis–backpropagation
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LightTools-Based Ray Tracing and Spot Distribution Rules for Herriott Cells J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 Weifeng Wang, Hanfei Liu, Hang Li, Bo Yang, Xiaowei Zhai, Jun Li, Duo Zhang, Li Feng Ren
Focusing on the problem of unclear ray-traced spots and their distribution rules in the design process of the Herriott cell, first, the characteristics of long-optical-path gas absorption cells were analyzed, and the calculation method of basic cavity length and the effective optical path of Herriott gas absorber cells were studied. Second, according to the transmission characteristics of geometric
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Luminescence of Sm3+ Ions Sensitized by a TiO2 Matrix J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-07 I. V. Baklanova, V. N. Krasil’nikov, A. P. Tyutyunnik, Ya. V. Baklanova
Ti1-xSmxO2-x/2 (x = 0.025, 0.05, and 0.1) solid solutions with the anatase structure were synthesized by the precursor method and characterized by x-ray diffraction and scanning electron microscopy. Titanium glycolate Ti(OCH2CH2O)2 in which Ti was partially replaced by Sm was used as the precursor. The Ti1-xSmxO2-x/2 solid solutions exhibited intense reddish-orange luminescence at room temperature
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Interpretation of Mossbauer Spectra of Multicomponent Single-Phase Disordered Solid Solutions Within an Extended Mathematical Model J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-03-01
A method for processing Mossbauer spectra of multicomponent single-phase disordered solid solutions using an extended mathematical model is proposed. The method can detect local distortions of a body-centered cubic lattice and the local symmetry of a resonant atom that arise from differences in the properties of the atoms of the mixed components. The significance of the extended mathematical model
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Development of a Validated RP-HPLC Method for the Estimation of Curcumin in Nanoemulsion and in Its Phase Solubility Studies J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-09 Zrien Naz, Mohammad Shah Faisal, Aquib Belal Khan, Afrien Naz, Farhan Jalees Ahmad
The study developed a simple, sensitive, and robust method for the estimation of curcumin in bulk drug form and in nanoemulsion formulation. Mobile phase consisting of acetonitrile and 20 mM potassium dihydrogen orthophosphate (pH 3.0) in ratio 55:45 was selected. A flow rate of 1 mL/min and an injection volume of 20 μL was injected to develop a chromatogram using a 516 C18 DB reversed-phase column
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Wood Recognition Based on Terahertz Spectrum and Hyperspectral Technology J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-09 Xing Da Yun, Yuan Wang, Wen Jin Ma, Lei Zhao
Terahertz time-domain spectroscopy (THz–TDS) and hyperspectral technology were used for wood recognition. As wood is a valuable national resource, it is essential to utilize it efficiently and reasonably by classifying the species of wood. To accomplish this, ten distinct species of wood, including five types of softwood (Pinus sylvestris, Pinus tabulaeformis, Pinus massoniana, Larix gmelinii, and
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Resistance of Acetyl-, Formyl-, and Methoxy-Phenylboronic Acids to Boroxine Formation and Their Employment in Fluoride Determination of Dental Formulations and Beverages by Fluorescence Quenching J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-09 Emrah Kilinc
Phenylboronic acids (PBAs) form stable complexes with fluoride. The effect of type (methoxy-, formyl-, and acetyl-) and position (ortho-, meta-, and para-) of electron-donating substitutions on the hydrolytic stability and acidity of PBAs, as well as their spectroscopic and physicochemical properties and their usage in spectrofluorimetric fluoride determination, were investigated. Thermal stabilities
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Self-Focusing of Rippled Elliptical q-Gaussian Laser Beam in Plasma with Axial Density Ramp J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-09 Naveen Gupta
Theoretical investigation on self-focusing of an elliptical q-Gaussian laser beam, carrying an intensity ripple over its cross section, in plasma with an axial density ramp has been presented. The optical nonlinearity of plasma has been modeled by the relativistic mass nonlinearity of plasma electrons in the field of a laser beam. Using the variational theory approach, semi-analytical solutions of
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Luminescence Properties of Al4B2O9:M (M = Dy3+, Sm3+, and Tb3+) J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08 İlhan Pekgözlü
The objective of this study was to investigate the photoluminescence properties of Al4B2O9:M (M = Dy3+, Sm3+, and Tb3+). The solution combustion method was employed to prepare Al4B2O9 doped with M ions. The synthesized aluminum borates were subjected to phase analysis using X-ray diffraction, while their photoluminescence properties were evaluated using a spectrofluorometer. Under excitation at 352
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Energy Transfer and Colorful Emission of Eu3+- and Tb3+-Co-Doped CaWO4 Phosphors J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08 L. H. Zhang, C. Y. Zhang, Y. B. Zhou, Y. L. Li, Q. L. Peng
Eu3+/Tb3+-co-doped CaWO4 phosphors were synthesized by a simple green co-precipitation process. The structure of the samples was investigated by X-ray diffraction. The photoluminescence spectra and fluorescence decay lifetimes of the samples were measured to investigate the luminescence properties. We analyzed the energy transfer process between Eu3+- and Tb3+-doped CaWO4. As the Tb3+ to Eu3+ energy
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Spectral-Charge Properties of a Titanium-Dioxide/Silicon Heterostructure Under Sunlight J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08 H. A. Kuraptsova, A. L. Danilyuk
The spectral-charge properties of a heterostructure of a 100-nm-thick n-type titanium dioxide (TiO2) film on a p-type silicon substrate in the solar radiation wavelength range of 300–1200 nm were studied by computer simulation. The presence of trap states in the TiO2 film that contribute to the localization of charge carriers was taken into account. The simulation was carried out using the Anderson
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Blue-Orange Emission from Sm3+-Activated LaCePO4 Phosphor for Display Applications J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08
We discuss new features of Sm3+-doped LaCePO4 phosphor as a potential candidate for display applications. Mainly, the traditional modified solid-state synthesis technique was used to prepare the samples. The X-ray diffraction technique was used for the structural studies. LaCePO4:Sm3+ phosphor production was verified by Fourier transform infrared studies. It was customary to use scanning electron microscopy
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Simple and Economical Uv-Spectrophotometric Method for Simultaneous Estimation of Chlorthalidone and Nebivolol in Combined Tablet Dosage Form: An Alternative Approach to the HPLC Method J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08 C. Bhagyalakshmi, T. N. Rekha, A. S. Sagheer, A. Tripathy, B. Ramesh, M. Manish
Three simple and affordable UV spectrophotometric methods have been proposed for the simultaneous determination of chlorthalidone and nebivolol in a synthetic mixture, as well as a combined dosage form. Method I use the simultaneous equation methodology and has a linearity range of 5–25 μg/mL for chlorthalidone at 233 nm and 5–90 μg/mL for nebivolol at 280 nm respectively. The linearity ranges for
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Stability Indicating Derivative Spectrophotometric Method for Determination of Trandolapril in Bulk and in Formulation J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08
Trandolapril is an oral angiotensin-converting enzyme (ACE) inhibitor approved by the USFDA for the therapy of hypertension and congestive heart failure. This paper describes the validation of zero- and first-order derivative UV spectrophotometric methods for the estimation of trandolapril in bulk and in its marketed tablet formulation. Preliminary spectrophotometric determination of the drug was carried
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Kinetic Spectrophotometric Method for Determination of Ceftriaxone in Bulk and Vials J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-08 Eman Yosrey, Heba Elmansi, Zeinab A. Sheribah, Mohammed El-Sayed Metwally
An ultra-sensitive kinetic spectrophotometric method has been carried out to determine ceftriaxone in a simple and cost-effective manner. The method utilized the catalytic behavior of the drug in accelerating the reaction between iodine and sodium azide. The fixed time method was exploited to select the optimum reaction time and it was found to be 7.0 min after the addition of iodine at pH 2.0 using
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Microstructure and Properties of Thin Films of Zirconium Produced by High-Frequency Laser Deposition J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06
Nanostructured thin films on a silicon substrate were obtained by high-frequency periodic pulse f ~ 6–10 kHz action of laser radiation with wavelength λ = 1.064 μm and power density q = 120 MW/cm2 on zirconium in a vacuum chamber at pressure p = 2.2 Pa. The morphology of the thin films of zirconium was studied by atomic-force microscopy. The transmission spectra of the zirconium films in the visible
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Filtering and Conversion of Information in Echo-Holography J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 G. I. Garnaeva, A. O. Andreev
The filtering of optical signals and the transformation of information using a stimulated echo hologram in the presence of external spatially inhomogeneous electric fields for the case when it is excited using an object laser pulse carrying information and a pulse acting as a frequency filter are considered. The reproducibility of information embedded in the temporal form of an object laser pulse is
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Electrocatalytic and Photoelectrochemical Properties of Nanotubular TiO2 Electrodes Thermally Treated in Air and Hydrogen J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 H. M. Maltanava, A. O. Konakov, T. V. Gaevskaya, N. V. Belko, M. P. Samtsov, S. K. Poznyak
Photoelectrochemical, structural, and electrocatalytic properties of titanium dioxide (TiO2) nanotubes obtained by the anodization of titanium with subsequent thermal treatment in air or hydrogen were studied. The heat treatment of TiO2 nanotubes in hydrogen was found to have no effect on the morphology and phase composition of the resultant TiO2 electrodes. However, such treatment led to a high concentration
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Character of the Change in the Voigt Contour of a Weak Absorption Line in a Laser Spectrometer with an Analytical Cavity J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 O. M. Vokhnik, P. V. Korolenko
The variation in the shape of the Voigt convolution profile in a spectrometer for measuring weak absorption consisting of a frequency tunable laser and an external analytic resonator is studied. It is found how the characteristics of the convolution and the parameters of the resonator affect the reproduction of the shape and width of the absorption line. The effect of absorption saturation on the accuracy
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Effect of the Spectral Composition of LED Artificial Lighting Sources on the Functional Activity of the Photosynthetic Apparatus of Basil Leaves J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 E. M. Kabacheuskaya, S. V. Sukhoveeva, Yu.V. Trofimov, M. I. Barkun
The influence of six experimental light sources (lamps) based on LEDs with different emission spectra simulating optical radiation close to solar radiation on the photochemical activity of photosystems (PS) of purple basil leaves and on the redox state of the P700 reaction center was studied. The spectra differed in the photon flux distribution over the main emission spectrum ranges, correlated color
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Exploring Machine-Learning-Enabled Libs Towards Forensic Trace Attributive Analysis of Fission Products in Surrogate High-Level Nuclear Waste J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 Joshua Nyairo Onkangi, Hudson Kalambuka Angeyo
We investigated the utility of machine-learning-enabled LIBS for direct rapid analysis of selected fission products (FPs), namely, Y, Sr, Rb, and Zr in surrogate high-level nuclear waste mimicking three hypothetical but realistic scenarios: post-detonation glass debris, post-detonation powders, and microliter liquid drops from a radiological crime scene (RCS). Artificial neural network calibration
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Semianalytic Representations of a Fourth-Order Mutual Coherence Function for a Laser Beam in a Turbulent Medium J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 N. N. Rogovtsov
New (linear and nonlinear) integral-functional equations, the solutions of which are a truncated spectral characteristic of a fourth order coherence function of a laser beam propagating in a turbulent medium are derived. The linear integral-functional includes an auxiliary function W on which the solution of the given equation does not depend (it is invariant with respect to the choice of W). For the
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Method for Assessing the Gas Resistance of Woody Plants J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 A. N. Yushkov, N. V. Borzykh, N. N. Saveleva, A. S. Zemisov, V. V. Chivilev, R. E. Bogdanov
A method to assess the gas resistance of woody plants was developed based on the level of inhibition of the photosynthetic activity of leaves exposed to toxic gases in the laboratory and could be used to identify plants resistant to environmental pollution for further practical and breeding use. The effective quantum yield of photosystem II was used as an indicator of genotype tolerance. The sensitivity
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Libs Hydrogen Isotopes Detection: Significance in Nuclear/Fusion Technology J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 M. Trtica, J. Savovic, M. Kuzmanovic, D. Rankovic, J. Stasic
The aspect of the detection of hydrogen isotopes in nuclear materials was analyzed in this review. Particular attention was paid to the spectroscopic methods for the detection of hydrogen isotopes in fusion reactor materials since their presence can induce severe problems in terms of material degradation and shortening of its lifetime. The main focus is on laser-induced breakdown spectroscopy, an optical
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Combined Use of Laser-Induced Breakdown and X-Ray Fluorescence Spectroscopies for Elemental Analysis of Aquatic Organisms J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 N. I. Sushkov, N. N. Kurian, S. N. Anuchin, S. M. Zaytsev
Elemental chemical analysis of aquatic organisms is necessary for biochemical and ecological studies and pollution monitoring. Most analytical methods suitable for this require dissolution of solid samples. However, nondestructive analysis is possible by x-ray fluorescence spectroscopy (XRF) and laser-induced breakdown spectroscopy (LIBS), the analytical capabilities of which are complementary. Results
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Spectroscopic Characterization, DFT Calculation, and Docking Analysis for Understanding Molecular Interaction Mechanism of Propiconazole and DNA J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 Neslihan Kaya Kinaytürk
This research presents a theoretical analysis based on structural and spectral data to elucidate the molecular interaction mechanism of propiconazole, a fungicide. The optimization, vibration bands, and electronic structure analysis were conducted using the B3LYP level density functional theory with the aug-cc-pVDZ basis set. Additionally, molecular docking simulations were performed to uncover the
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Influence of the Nonideality of the Axicon and Input Gaussian Beam on the Quality Parameters and Fourier Spectrum of the Generated Bessel Light Beam J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06 I. V. Balykin, A. A. Ryzhevich, N. S. Kazak
The influence of three factors on the formation of a Bessel light beam (BLB) in the scheme of transforming a Gaussian beam by an axicon were investigated using Fourier optics via numerical simulation. The factors were the ellipticity of the incident light beam, the ellipticity of the axicon, and the presence of a round tip on the axicon. The results of the influence of each factor on the structure
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Temperature−Frequency Dependences of the Electrophysical Characteristics of Polyfunctional Compounds Using Guaiacol as an Example J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-06
Dependences of the components of the complex dielectric permittivity and specific electrical conductivity in the frequency range 10−2–107 Hz at temperatures of 213–433 K of guaiacol, a model compound of lignin, one of the most common biopolymers, are analyzed. Three groups of relaxation oscillators are identified. Their characteristics (relaxation time and activation energy) are determined. The activation
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Two-Zone Model of Laser-Induced Plasma J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 S. M. Zaitsev, I. N. Krylov, A. M. Popov, T. A. Labutin
An algorithm modeling a plasma in two-zone source approximation and its interface with the NLopt library for multiparameter optimization were established. In order to allow the spectrum modeling algorithm and the NLopt library to work together an abstraction layer that initializes both libraries in one action, calculates a given type of loss function, and transfers its value to the optimization algorithm
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Transmission Spectra of Diluted and Concentrated Magnetite Colloids in Liquid Dielectrics J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 K. V. Yerin, V. I. Vivchar
Transmission spectra of colloidal solutions of magnetite nanoparticles in kerosene with various volume concentrations of the solid phase and the influence on them of an external magnetic field have been studied. A pronounced maximum in the near-IR region at 740–760 nm appeared in the spectra as the magnetite concentration increased. The magnetite concentration limits at which the transmission spectra
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Fourier-IR Spectroscopy of Photoresist/Silicon Structures for Explosive Lithography J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 D. I. Brinkevich, E. V. Grinyuk, S. D. Brinkevich, V. S. Prosolovich, V. V. Kolos, O. A. Zubova, S. B. Lastovskii
Photoresist (PR) NFR 016D4 films deposited on the surface of silicon (Si) wafers by centrifugation were studied by attenuated total internal reflection Fourier-IR spectroscopy. Background absorption of the PR/Si structures was observed to increase at wave numbers <1600 cm−1 because of the effect of electromagnetic radiation on the Si substrate and scattering/reflection at the PR/Si interface. Asymmetry
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Stimulation by Electromagnetic Radiation of Copper(Ii) Sulfate and Oxide Interactions with Chelating Ligands J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05
The influence of UV-Vis and monochromatic radiation (λ = 408 nm) on the reactions of copper sulfate (CuSO4) and copper(II) oxide (CuO) with β-diketones, chelators, and dicarboxylic acids was studied. The reactions of CuSO4 and CuO with Trilon B and succinic acid in aqueous media in the presence of urea occurred faster by using UV-Vis radiation. UV radiation accelerated the reaction of CuSO4 with H4edta
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Use of Hyperfine Structure of Optically Detected Magnetic Resonance Spectrum of a Single NV-Defect in Diamond in Quantum Sensorics of Weak Magnetic Fields J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 N. S. Kukin, A. R. Muradova, A. K. Nikitin, A. A. Buhtijarov, A. P. Nizovtsev, P. A. Semenov, A. N. Vasiliev, N. I. Kargin, M. O. Smirnova
The possibility of using NV-defects in diamond at room temperature on nanometer spatial scales to measure magnetic fields was studied. For these purposes, samples with high concentrations of NV-centers are usually used, which increases the signal level but prevents the measurement of inhomogeneous fields on the scale of molecules or nanostructures. The parameters of a weak magnetic field were measured
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Morphology and Structure of Coatings Obtained by Laser Ablation of Rare-Earth Metals J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 S. S. Anufrick, N. N. Kurian, I. G. Sergienko, S. N. Anuchin
The optical properties, morphology, and structure of coatings from nanoparticles of rare-earth metals La, Nd, Pr, and Y, obtained by laser ablation with an Nd 3+:YAG laser in various media (air, distilled water), were investigated. It was established that the electronic absorption spectra of colloidal solutions of the studied nanoparticles have maxima in the UV and visible regions. The optical density
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Laser with Transverse Excitation Generating in Several Spectral Ranges J. Appl. Spectrosc. (IF 0.7) Pub Date : 2024-01-05 S. S. Shavel, V. A. Gorobets, S. B. Bushuk, I. N. Puchkovsky
Results are presented for a TEM laser system with a peak output power of ≥10 kW in several spectral ranges and with an improved design through the use of a combined gas mixture containing inert gases lasing on electronic transitions in addition to CO2 molecules.
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Stochastic Resonance in Optoelectronic Artificial Spiking Neuron J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 N. V. Lakhmitskii, V. N. Chizhevskii, S. Ya. Kilin
The results from experimental investigation of the stochastic resonance effect in an optoelectronic artificial spiking neuron (ASN) based on a single photon detector and a laser with a vertical resonator are presented. The ASN is excited by a periodic signal and noise. It was shown that significant amplification of the periodic signal and increase in the signal-to-noise ratio are observed at a certain
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Use of Differential Optical Spectroscopy for Satellite Diagnostics of Methane Content in a Scattering Atmosphere J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 A. I. Bril, N. S. Miatselskaya, V. A. Peshcharankou, A. P. Chaikovsky
The application of differential optical absorption spectroscopy (DOAS) for the diagnostics of localized methane emission based on data from satellite spectral measurements is discussed. It is shown that the application of DOAS in a scattering atmosphere can lead to significant errors in estimates of the concentration of methane. It is proposed that it be supplemented by a filtering procedure for signals
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Singlet Oxygen Generation by an Indotricarbocyanine Dye with Bulky Substituents J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 M. P. Samtsov, D. S. Tarasov, E. S. Voropay
A study was carried out on the spectral-luminescence and phosphorescence properties of an indotricarbocyanine dye with an ortho-phenylene bridge in the conjugation chain as well as two 300-Da polyethylene glycol (PEG) substituents (PD1) and its analog without PEG (PD2). The presence of the bulky PEG300 substituents in the dye structures was shown to alter the efficiency of singlet oxygen generation
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Quantum Memory on 13C–13C Dimers in Diamond with NV Centers: Simulation by Quantum Chemistry Methods J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 A. P. Nizovtsev, A. L. Pushkarchuk, S. A. Kuten, D. Lyakhov, D. L. Michels, A. S. Gusev, N. I. Kargin, S. Ya. Kilin
Individual electron–nuclear spin systems in solids are promising platforms for implementation of second-generation quantum technologies. The recognized leader among such systems is the negatively charged nitrogen–vacancy color center (NV center) in diamond with hyperfine coupling to nuclear spins of carbon-13 (13C), which are widely used as a quantum memory in emerging quantum technologies because
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Identification of Mineral Pigments in Belarusian Icons of the XVIII–XIX Centuries Using Atomic and Molecular Spectroscopy J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 E. V. Shabunya-Klyachkovskaya, A. G. Mitskevich, M. V. Belkov, K. Yu. Katsalap, A. S. Matsukovich, S. P. Vitsiaz, N. P. Melnikau, A. V. Medved
Results of a comprehensive analytical study of Belarusian icons of the XVIII–XIX centuries are summarized. The mineral pigments used for their creation have been identified. Some patterns of their use were revealed.
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Covalent Tryptophan–Nanodiamond Complex as an Effective Fluorescent Marker for the Detection of Halocarbons in Solutions J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 V. A. Lapina, T. A. Pavich, Ju. A. Kalvinkovskaya
Phototransformation of free tryptophan (Trp) and Trp complexed with nanodiamond particles (ND–Trp) in the presence of a halocarbon (HC) i.e., chloroform CHCl3), was studied by steady-state spectroscopy. UV irradiation of solutions in the presence of CHCl3 was found to increase the fluorescence intensity of the phototransformation products of Trp (PTT), i.e., kynurenine and its derivatives. The integral
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Comparison of the Spatial-Energy Profiles of the Visibility Zones of Active-Pulse Vision Systems for Two Methods of Observation J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 B. F. Kuntsevich, I. N. Puchkouski, S. S. Shavel
The features of the formation of the spatial-energy profiles (SEP) of the visibility zones for two methods of observation (MO) are compared by numerical simulation taking the energy of the noise threshold Ent into account. It is confirmed for both MOs that the relationship previously used in the literature in which the length of the visibility zone (VZ) is uniquely determined by the sum of the lengths
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IR Spectroscopic Study of the Mechanism of Mechanochemical Synthesis of Tubular Titanium Dioxide at High Contact Pressure J. Appl. Spectrosc. (IF 0.7) Pub Date : 2023-12-04 V. B. Shcherbakova, T. V. Sviridova, D. V. Sviridov
It was shown by IR spectroscopy that the mechanism of formation of titanium dioxide (TiO2) tubulenes during the mechanochemical activation of nanodispersed hydrated TiO2 under the conditions of high contact pressure includes a stage of aggregation of the TiO2 particles through the formation of Ti–O–Ti bridges. During further mechanical action the oxide blocks are transformed into two-dimensional crystalline