-
Rapid Quality Assessment of Polygoni Multiflori Radix Based on Near-Infrared Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2024-3-20 Bin Jia, Ziying Mai, Chaoqun Xiang, Qiwen Chen, Min Cheng, Longkai Zhang, Xue Xiao
The precise and prompt determination of quality control indicators such as moisture, stilbene glycosides, and anthraquinone glycosides is crucial in assessing the quality of Polygoni Multiflori Radix. Near-infrared spectroscopy is a nondestructive analytical technique that offers a more desirable approach than traditional methods for assessing content levels. In this study, various spectral preprocessing
-
Raman Spectra of PbTe- and GeTe-Based Monocrystalline Epitaxial Layers J. Spectrosc. (IF 2.0) Pub Date : 2024-3-11 N. Romcevic, B. Hadzic, P. Dziawa, T. Story, W. D. Dobrowolski, M. Romcevic
Lead telluride and germanium telluride are well-known IV-VI semiconductors, which is now the focus of research due to the perspective of application as thermoelectrics for midrange temperatures. Solid solutions and heterostructures on this basis, obtained by molecular beam epitaxy, are a promising direction for the development of these materials. In this paper, we have focused on the Raman spectra
-
Gemological and Spectral Characteristics of Gem-Quality Blue Gahnite from Nigeria J. Spectrosc. (IF 2.0) Pub Date : 2024-2-10 Yifang Chen, Junhao Zheng, Mingmei Lu, Ziqi Liu, Zhengyu Zhou
Gem-quality blue octahedral crystalline gahnite was produced in Nigeria. This paper investigated gemological and spectroscopic characteristics by basic gemological experiments, electron probes, infrared reflectance spectroscopy, laser Raman spectroscopy, photoluminescence spectroscopy, and ultraviolet-visible spectroscopy. The results show that the refractive index (RI) of Nigerian gahnite is 1.792∼1
-
Application of Common Components Analysis to Mid-Infrared Spectra for the Authentication of Lebanese Honey J. Spectrosc. (IF 2.0) Pub Date : 2024-2-6 Rita El Hajj, Wadih Skaff, Nathalie Estephan
Honey is considered as a premium food produced by honeybees. It is highly appreciated by consumers around the world and raises a major concern nowadays which is ensuring its authenticity in respect to its production and its botanical origin. In Lebanon, honey is mainly multifloral which makes its authentication rather difficult. While mid-infrared (MIR) spectroscopy combined with multivariate analysis
-
Collaborative Inversion of Soil Water Content in Alpine Meadow Area Based on Multitemporal Polarimetric SAR and Optical Remote Sensing Data J. Spectrosc. (IF 2.0) Pub Date : 2024-1-24 Meng Kong, Xiaoqing Zuo, Yongfa Li
Soil water content is a critical environmental parameter in research and practice, though various technological and contextual constraints limit its estimation in arid areas with vegetation cover. This study combined the multitemporal remote sensing data of Sentinel-1 and Landsat 8 to conduct an inversion study on surface soil water content under low vegetation cover in Nagqu, central Tibetan Plateau
-
Geochemical Characterization of Sedimentary Materials (Limestone, Gypsum, Coal, and Iron Ore) along the Nile River Basin, South Wollo, Ethiopia J. Spectrosc. (IF 2.0) Pub Date : 2024-1-19 Sisay Awoke Endalew, Assamen Ayalew Ejigu, Desalegn Gezahegn Ketemu, Wudu Yimer Assen
Sedimentary rocks are produced by the weathering of preexisting rocks and the subsequent transportation and deposition of the weathering products. Among the sedimentary rocks, especially limestone is a crucial raw material for cement production. The purpose of this study was to characterize the valuable industrial raw materials, limestone, gypsum, clay, coal, and iron ore, along with the Nile River
-
Use of Machine Learning Models for Prediction of Organic Carbon and Nitrogen in Soil from Hyperspectral Imagery in Laboratory J. Spectrosc. (IF 2.0) Pub Date : 2023-12-20 Manuela Ortega Monsalve, Mario Cerón-Muñoz, Luis Galeano-Vasco, Marisol Medina-Sierra
Organic carbon and total nitrogen are essential nutrients for plant growth. The presence of these nutrients at acceptable levels can create an optimal environment for the development of crops of interest. The application of spectroscopic techniques and the use of machine learning algorithms have made it possible to calibrate models capable of predicting the number of elements present in the soil. One
-
Vibrational Biospectroscopy in the Clinical Setting: Exploring the Impact of New Advances in the Field of Immunology J. Spectrosc. (IF 2.0) Pub Date : 2023-12-12 Siddarth Kannan, Emma L. Callery, Anthony W. Rowbottom
The investigation of pathological diseases largely relies on laboratory examinations. The ability to identify and characterise cells is an essential process for clinicians to reach an accurate diagnosis and inform appropriate treatments. There is currently a gap between the advancement of scientific knowledge on cellular and molecular pathways and the development of novel techniques capable of detecting
-
Multiple PAHs’ Detection under CDOM Interference Based on Excitation-Emission Matrix and Interval Selection J. Spectrosc. (IF 2.0) Pub Date : 2023-12-8 Ruizhuo Li, Limin Gao, Guojun Wu, Jing Dong
Fluorescence technology is an effective tool for detecting polycyclic aromatic hydrocarbons (PAHs) in water. However, the accuracy of fluorescence detection is reduced by the spectral overlap of different PAHs and coexisting colored dissolved organic matter (CDOM). In this study, a single-excitation interval selection method based on an excitation-emission matrix is proposed to quantify four PAHs:
-
Rapid Determination of Escherichia coli Concentration in Water Using Multiwavelength Transmission Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2023-11-18 Yuxia Hu, Ruixiang Zhang, Liye Guo, Dun Hu
Bacterial concentration is an important indicator to measure the degree of water pollution. Realizing rapid and accurate quantification of bacterial concentration in water is of great significance for ensuring water safety and maintaining human health. This paper proposes a method for rapid determination of bacterial concentration by multiwavelength transmission spectroscopy combined with partial least
-
Synthesis and Characterization of PANI/ZnFe2O4 nRs with Different Doping Concentrations for Potential Applications in Various Fields J. Spectrosc. (IF 2.0) Pub Date : 2023-10-25 Taymour A. Hamdalla, Meshari M. Aljohani, Abdulrhman M. Alsharari
The wide-ranging potential of polyaniline (PANI) composites in energy storage, electrochemical, sensing, and electromagnetic shielding applications emphasizes researchers to improve its properties. Here, the doping of ZnFe2O4 nRs by 1, 3, and 5 wt. % within polyaniline has been done. Then, we characterize the doped material using techniques such as scanning electron microscopy (SEM), X-ray diffraction
-
Oxidative Coupling Assay for Mesalazine Determination in Pharmaceuticals and Spiked Human Plasma Utilizing Syringic Acid J. Spectrosc. (IF 2.0) Pub Date : 2023-8-5 Suzan S. Taha, Diyar S. Ali
This study reports on developing a simple, cost-effective, highly sensitive spectrophotometric method for measuring mesalazine (MSZ). The method utilizes the oxidative coupling of MSZ with syringic acid (4-hydroxy 3,5-dimethoxybenzoic acid) in the presence of dissolved oxygen under alkaline conditions to form a stable indophenol dye with a characteristic blue color, which can be measured at 615 nm
-
A Dataset on Corn Silage in China Used to Establish a Prediction Model Showing Variation in Nutrient Composition J. Spectrosc. (IF 2.0) Pub Date : 2023-7-1 Shu Zhang, Jian Hao, Donghai Wang, Chenglong Luo, Na Lu, Xiaocen Guo, Yanfang Liu, Zixiao Zhang, Shengli Li
It is important to assess the nutritional concentrations of forage before it can be used for tremendous improvements in the dairy industry. This improvement requires a rapid, accurate, and portable method for detecting nutrient values, instead of traditional laboratory analysis. Fourier-transform infrared (ATR-FTIR) spectroscopy technology was applied, and partial least squares regression (PLSR) and
-
Calculations of Constant-Height STM Images of Fullerene C60 Adsorbed onto a Surface J. Spectrosc. (IF 2.0) Pub Date : 2023-6-21 Effat A. Rashed
Constant-height scanning tunneling microscopy (STM) images of a C60 molecule adsorbed onto a surface were calculated using symmetry-adapted Hückel molecular orbitals (HMOs). Three adsorption orientations of C60 are considered. The interaction between the C60 molecule and the surface was treated using symmetry arguments only. Projection operators were used to generate symmetry-adapted HMOs of the molecule
-
In Situ Compositional Analysis of Tomato Plants and Cell Wall Using Fiber Optic Fourier-Transform Near-Infrared Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2023-6-3 Raghav Tewari, Ritu Joshi
This research was intended to define and interpret cell wall attributes and other chemical composition of eight different varieties of tomato plants by utilizing fiber optic Fourier-transform near-infrared spectroscopy (FT-NIR) to acquire in situ chemical signatures of leaf, flower, fruit, and stem of tomato plant and cell wall at different developmental stages. Chemical spectral signatures of the
-
A Study of the Electronic Absorption and Emission Spectra of DBDMA Dye: Solvent Effect, Energy Transfer, and Fluorescence Quenching J. Spectrosc. (IF 2.0) Pub Date : 2023-6-2 Sadeq M. Al-Hazmy, Jameelah Al-Harby, Mohammed Hassan, Sabri Messaoudi, Ibrahim A. Alhagri, Ahmed N. Alhakimi
This study is aimed to shed light on the electronic absorption and emission spectra of DBDMA (2-(1-(difluoroboraneyl)-1,2-dihydroquinolin-2-yl)-2-(1-methylquinoxalin-2-ylidene) acetonitrile) in different solvents. Both types of spectra were obtained theoretically and produced experimentally in different solvents. The photostability of dye was tested, and its energy transfer behavior in the presence
-
Microstructural Changes of Bone after Soft Tissue Removal: ATR-FTIR and XRD Spectroscopies J. Spectrosc. (IF 2.0) Pub Date : 2023-5-12 Mohammad A. Alebrahim, M-Ali H. Al-Akhras, Ahmad S. Al-Hiyasat, Ali S. Ba Rajjash, M. S. Mousa, Abdulla Al Darayseh
The structural alterations that may arise in boiled and nonboiled bones are often overlooked despite their critical importance in the development of defleshing techniques across various scientific disciplines. To elucidate the microstructural characteristics of bones following the removal of soft tissue through conventional methods, attenuated total reflectance Fourier-transform infrared (ATR-FTIR)
-
Quick Determination of Soil Quality Using Portable Spectroscopy and Efficient Multivariate Techniques J. Spectrosc. (IF 2.0) Pub Date : 2023-5-11 Ernest Teye, Charles L. Y. Amuah, Kofi Atiah, Ransford Opoku Darko, Thomas Abindaw, Kwadwo Kusi Amoah, Michael Miyittah, Emmanuel Afutu, Rebecca Owusu
Rapid and onsite determination of the soil status and quality parameters holds a brighter potential for improving food security, and minimizing waste of the excessive application of soil amendments hence reducing environmental pollution. In this study, a pocket-sized shortwave NIR spectroscopy (740–1070 nm) and multivariate statistics were used to classify soil from different land-use types and simultaneously
-
Effect of Laser Heating on Partial Decomposition of Bi12SiO20 (BSO) Single Crystal: Raman Study J. Spectrosc. (IF 2.0) Pub Date : 2023-5-4 Nebojsa Romcevic, Branka Hadzic, Marija Prekajski Đorđević, Peda Mihailovic, Milica Curcic, Jelena Trajic, Jelena Mitric, Maja Romcevic
The effect of laser (532 nm line of Verdi G) heating during the Raman measurements, on partial decomposition of Bi12SiO20 single crystal, was addressed in this study. The degree of decomposition directly depends on the power density and duration of the laser treatment, which are registered by the phonon Raman spectra. After laser treatment, AFM measurements register additional small spherical islands
-
Multivariate Image Analysis Applied to Cross-Laminated Timber: Combined Hyperspectral Near-Infrared and X-ray Computed Tomography J. Spectrosc. (IF 2.0) Pub Date : 2023-4-22 Dietrich Buck, Olle Hagman
Engineered wood products, such as cross-laminated timber (CLT), are becoming more popular in the designs of modern sustainable buildings. This increased production of CLT requires more robust, yet less labour-intensive means to assess the material characteristics of whole CLT panels. In exploring ways of improving efficiency, this study explores multivariate image analysis (MIA) via partial least squares
-
Optical Design and Simulation of Snapshot Hyperspectral Dental Imaging Spectrometer with One-Dimensional Random Coding J. Spectrosc. (IF 2.0) Pub Date : 2023-4-20 Jiajing Cao, Jun Chang, Yi Huang, Wenxi Wang, Xinran Guo, Shangnan Zhao
To achieve perfect teeth color reproduction, we propose the design of a snapshot hyperspectral imaging spectrometer that can accurately measure the teeth spectrum. In this paper, the optical system of a snapshot hyperspectral dental imaging spectrometer is designed. In particular, to encode images in both the spatial and spectral dimensions, a one-dimensional random coding mask rotated 45 degrees around
-
The Ultraviolet-Visible Luminescence of Ce3+ in Ca2Mg(BO3)2 Phosphors with Potential Applications J. Spectrosc. (IF 2.0) Pub Date : 2023-4-19 Jing-Xiang Zhang, Yanru Lin, Huihong Lin
New phosphors Ca2Mg(BO3)2: Ce3+ were synthesized by the solid-state reaction method at a high temperature. The phase purity was characterized by powder X-ray diffraction (XRD). The ultraviolet-visible (UV-Vis) optical properties of Ce3+ have been investigated, and the lowest 5d levels, the emission, and the Stokes shifts of Ce3+ in the host lattice were identified. In addition, its concentration quenching
-
Study of the Hydration Mechanism of Portland Cement with Raman Spectroscopy Applying CO2 Laser Radiation J. Spectrosc. (IF 2.0) Pub Date : 2023-4-15 D. Quiroz-Portillo, I. Rosales-Candelas, J. J. Soto-Bernal, R. González-Mota, G. V. Vázquez
This work presents the results by irradiating fresh Portland cement pastes with CO2 laser, at powers of 1.6, 2.0, and 2.4 W, at different water-to-cement (w/c) ratios 0.4, 0.45, and 0.5. Raman spectra show the evolution and accelerated growth of the main hydration products through the intensity changes of the Raman signal. The Raman shifts reveal that the C-S-H, CH, AFt, and CaCO3 bands are detected
-
Study of the Binding of Cuminaldehyde with Bovine Serum Albumin by Spectroscopic and Molecular Modeling Methods J. Spectrosc. (IF 2.0) Pub Date : 2023-4-14 Mohd Sajid Ali, Md Tabish Rehman, Hamad A. Al-Lohedan, Mohamed F. Alajmi
Here, we investigated the interaction of cuminaldehyde with a model carrier protein, bovine serum albumin (BSA). The formation of the BSA–cuminaldehyde complex was confirmed through ultraviolet–visible (UV–Vis) spectroscopy and further proven by detailed intrinsic fluorescence spectroscopic measurements. As observed, cuminaldehyde quenched the intrinsic tryptophanyl fluorescence of BSA. The fluorescence
-
Quantitative Detection of Quartz Sandstone SiO2 Grade Using Polarized Infrared Absorption Spectroscopy with Convolutional Neural Network Model J. Spectrosc. (IF 2.0) Pub Date : 2023-4-4 Banglong Pan, Hongwei Cheng, Shuhua Du, Hanming Yu, Shaoru Feng, Yi Tang, Juan Du, Huaming Xie
As an independent characteristic of electromagnetic radiation, the polarization of light is sensitive to the scattering and absorption characteristics of the mineral particles. The combination of polarization and infrared absorption spectroscopy is conducive to rapidly and accurately detecting the SiO2 content of metallurgical sandstone deposits. In this study, the 8–14 μm polarized infrared absorption
-
GC-MS Phytochemical Profiling, Antidiabetic, and Antioxidant Activities of Khaya senegalensis Stem Bark and Azadirachta indica Leaves Extracts in Rats J. Spectrosc. (IF 2.0) Pub Date : 2023-3-27 Rania Mustafa Ahmed, Asaad Khalid, Syam Mohan, Sakina Yagi, Hasseba Ahmed Saad, Nada Kamal Bayoumi, Amna Ali, Karam Ahmed El-Sharkawy, Hassan A. Alhazmi, Mohammed Albratty, Sadique A. Javed, Shahnaz Sultana, Abdulkarim M. Meraya
This study was performed to evaluate phytochemical composition of Khaya senegalensis stem bark and Azadirachta indica leaf hydroethanolic (80%) extracts using GC-MS technique as a tentative identification method and screen for antioxidant and antidiabetic properties in Wistar rats. Diabetes was induced by intraperitoneal injection of alloxan (150 mg/kg·bw). Animals were divided into groups of six and
-
Clinical, Biochemical, and ATR-FTIR Spectroscopic Parameters Associated with Death or Survival in Patients with Severe COVID-19 J. Spectrosc. (IF 2.0) Pub Date : 2023-3-11 Adriana Martinez-Cuazitl, Monica M. Mata-Miranda, Miguel Sanchez-Brito, Daniel Valencia-Trujillo, Amanda M. Avila-Trejo, Raul J. Delgado-Macuil, Consuelo Atriano-Colorado, Francisco Garibay-Gonzalez, Virginia Sanchez-Monroy, Gustavo J. Vazquez-Zapien
The wide range of symptoms of the coronavirus disease 2019 (COVID-19) makes it challenging to predict the disease evolution using a single parameter. Therefore, to describe the pathophysiological response to SARS-CoV-2 infection in hospitalized patients with severe COVID-19, we compared according to survival or death, the sociodemographic and clinical characteristics, the biochemical and immunological
-
Considerations in Raman Spectroscopy for Real-Time API Concentration Measurement at Tablet Press Feed Frame J. Spectrosc. (IF 2.0) Pub Date : 2023-2-16 Sumit Kumar, Zoltan Nagy, Gintaras V. Reklaitis, Marcial Gonzalez
Raman spectroscopy is one of the important process analytical technology tools available for implementation in the continuous manufacturing of oral solid dosages. The aim of this study was to investigate several practical considerations in generating real-time measurements using Raman spectrometer at a tablet press feed frame, including the effects of fluorescence interference, photobleaching, feed-frame
-
Nonlinear Correction Methods of Temperature-Caused Peak Shift for a NaI(Tl) Gamma-Ray Spectrometer J. Spectrosc. (IF 2.0) Pub Date : 2023-2-13 Jinfei Wu, Juan Zhai, Wanchang Lai, Hongjian Lin, Chenhao Zeng, Runqiu Gu, Shaoqin Li, Yunrui Jiang, Jie Shi, Bo Zhang
NaI(Tl) detectors are frequently operated under unstable temperature conditions when used in an open environment. Temperature changes would result in a peak shift and spectral distortion during measurement. Two easy-to-implement methodologies are proposed to stabilize the measured spectrum without the necessity of adjusting the gain, which are a correction algorithm for temperature-caused peak-shift
-
Surface Soil Moisture Estimation Using a Neural Network Model in Bare Land and Vegetated Areas J. Spectrosc. (IF 2.0) Pub Date : 2023-1-4 Dayou Luo, Xingping Wen, Ping He
Most of the approaches to retrieve surface soil moisture (SSM) by optical and thermal infrared (TIR) spectroscopies are purposed to calculate various characteristic bands/indices and then to establish the regression relationship between them in combination with the measurement data. However, due to the combined impact of many factors, the regression relationship often shows nonlinearity. Moreover,
-
High Zoom Ratio Foveated Snapshot Hyperspectral Imaging for Fruit Pest Monitoring J. Spectrosc. (IF 2.0) Pub Date : 2023-1-3 Yaoyao Hu, Jun Chang, Yiting Li, Wenchao Zhang, Xiaoxiao Lai, Quanquan Mu
Snapshot hyperspectral imaging technology is increasingly used in agricultural product monitoring. In this study, we present a 9× local zoom snapshot hyperspectral imaging system. Using commercial spectral sensors with spectrally resolved detector arrays, we achieved snapshot hyperspectral imaging with 14 wavelength bands and a spectral bandwidth of 10–15 nm. An experimental demonstration was performed
-
Component Prediction of Antai Pills Based on One-Dimensional Convolutional Neural Network and Near-Infrared Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-12-5 Tuo Guo, Fengjie Xu, Jinfang Ma, Fahuan Ge
Convolutional neural networks (CNNs) are widely used for image recognition and text analysis and have been suggested for application on one-dimensional data as a way to reduce the need for preprocessing steps. In this study, the performance of one-dimensional convolutional neural network (1DCNN) machine learning algorithm was investigated for regression analysis of Antai pills spectral data. This algorithm
-
Identification of Damage in Pear Using Hyperspectral Imaging Technology J. Spectrosc. (IF 2.0) Pub Date : 2022-12-3 Cheng-Tao Su, Bin Li, Hai Yin, Ji-Ping Zou, Feng Zhang, Yan-De Liu
Crown pears are an important economic crop, but their quality and economy are seriously affected by the different levels of damage. To improve the overall quality of crown pears, sorting of crown pears with different levels of damage is required. However, there are some shortcomings in the traditional detection methods, such as low efficiency and large error. Therefore, the hyperspectral technology
-
Feasibility Study on the Use of a Portable NIR Spectrometer and Multivariate Data Analysis to Discriminate and Quantify Adulteration in Fertilizer J. Spectrosc. (IF 2.0) Pub Date : 2022-11-29 Ernest Teye, Charles L. Y. Amuah, Kofi Atiah, Ransford Opoku Darko, Kwadwo Kusi Amoah, Emmanuel Afutu, Rebecca Owusu
The rise in population growth worldwide requires efficient management of agricultural lands through the correct determination of authentic fertilizers. In this current study, a rapid on-site detection technique was developed by using portable NIR spectroscopy in the wavelength range of 740–1070 nm together with optimum multivariate algorithms to identify fertilizer integrity (unexpired, expired, and
-
Reduction of Background Fluorescence from Impurities in Protein Samples for Raman Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-11-24 Marco Pinto Corujo, Pavel Michal, Rod Wesson, Don Praveen Amarasinghe, Alison Rodger, Nikola P. Chmel
Background fluorescence remains the biggest challenge in Raman spectroscopy because of the consequent curvature of the baseline and the degradation of the signal-to-noise ratio of the Raman signal. While the concentrations of the fluorophore impurities are usually too low to be detected by other analytical methods, they are often sufficient to prevent Raman data collection. Among the different existing
-
A New Method for Spectral Wavelength Selection Based on Multiple Linear Regression Combined with Ant Colony Optimization and Genetic Algorithm J. Spectrosc. (IF 2.0) Pub Date : 2022-11-22 Qing Huang, Heru Xue, Jiangping Liu, Xinhua Jiang
Wavelength selection is one of the key steps in quantitative spectral analysis, which reduces the computation time while also improving the prediction accuracy of the model. In this paper, we propose a wavelength selection algorithm based on the ant colony optimization (ACO), in which the absolute value of the regression coefficient of the multiple linear regression (MLR) model is used as the basis
-
Simple Determination of Gemifloxacin Levels in Human Plasma using High-Performance Liquid Chromatography-Tandem Mass Spectrometry J. Spectrosc. (IF 2.0) Pub Date : 2022-11-10 Gaeun Kang, Sang Heon Suh, Seong Kwon Ma, Jong-Keun Kim
Gemifloxacin, a broad-spectrum antibacterial agent of the fluoroquinolone class, is used to treat bacterial infections, including acute bacterial exacerbation of chronic bronchitis and community-acquired pneumonia. This study aimed to develop a simple and robust analysis of gemifloxacin in human plasma by high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS). The sample was prepared
-
Evaluation of a Peak-Free Chemometric Laser-Induced Breakdown Spectroscopy Method for Direct Rapid Cancer Detection via Trace Metal Biomarkers in Tissue J. Spectrosc. (IF 2.0) Pub Date : 2022-10-26 Otieno Emily Akinyi, Angeyo Hudson Kalambuka, Alix Dehayem-Kamadjeu
The ability to perform direct rapid analysis in air and at atmospheric pressure is a remarkable attraction of laser-induced breakdown spectroscopy (LIBS) for the diagnostic quantification of disease biomarker metals in body tissue. However, accurate trace analysis is limited by matrix effects and a pronounced background that masks the subtle (peak-free) analyte signals because tissue plasma is dense
-
Measurement of Phenolic Compounds by Spectrometry and Chromatography in Lime Juices J. Spectrosc. (IF 2.0) Pub Date : 2022-10-22 Fatemeh Shakeri, Mohammad Shakeri, Fatemeh Pour Ramezani, Mohadeseh Pirhadi, Masoud Aman Mohammadi, Samira Shokri, Tayebeh Zeinali
Juice demand has been increasing at a rapid rate in recent years, and one of the major efforts underway to meet this demand is to minimize changes during the juice process. Due to the high consumption of juice and the carcinogenicity of synthetic and chemical substances, this research uses high performance liquid chromatography (HPLC) and spectrophotometry to detect fake juices. For the detection of
-
Study on the Quantitative Assessment of Impact Damage of Yellow Peaches Using the Combined Hyperspectral Technology and Mechanical Parameters J. Spectrosc. (IF 2.0) Pub Date : 2022-10-14 Feng Zhang, Bin Li, Hai Yin, Jiping Zou, Aiguo Ouyang
The quantitative description of the impact damage of yellow peaches is an essential basis for evaluating their quality and guiding their postharvest handling. In this study, the combined hyperspectral technology and mechanical parameters method were used to quantitatively investigate the impact damage of yellow peaches. Firstly, the mechanical parameters, which are damaged area, absorbed energy, maximum
-
Quantitative Raman Spectroscopic Determination of the Composition, Pressure, and Density of CO2-CH4 Gas Mixtures J. Spectrosc. (IF 2.0) Pub Date : 2022-9-30 Ying Chen, I-Ming Chou
The Raman spectra for pure CO2 and CH4 gases and their ten gas mixtures were collected at pressures and temperatures ranging from 2 MPa to 40 MPa and room temperature (∼24°C) to 300°C, respectively. A systematic analysis was carried out to establish a methodology for the quantitative determination of the composition, pressure, and density of CO2-CH4 mixtures. The shift in the peak position of the υ1
-
Spectroscopic Study on the Species and Color Differences of Gem-Quality Red Garnets from Malawi J. Spectrosc. (IF 2.0) Pub Date : 2022-9-27 Ming Li
To reveal the species of gem-grade red garnets with similar colors, especially the mechanisms underlying their subtle color differences, a series of tests, including conventional gemological tests, X-ray diffraction, Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and X-ray photoelectron spectroscopy, were performed on gem-grade red garnets mined from Malawi. The results
-
Simple Analytical Method on the Determination of Dexamethasone in Herbal Medicine J. Spectrosc. (IF 2.0) Pub Date : 2022-9-27 Rimadani Pratiwi, Adira Rahmawaty, Aliya Nur Hasanah
Chemical drugs have been added to some of the traditional herbal medicine to enhance the therapeutic effect. One of them is dexamethasone which is added in herbal pain relief. To determine the content of dexamethasone in herbal medicine, a quantitative analytical method was developed with the reaction of the formation of a dexamethasone-hydroxylamine complex with fluoranil which was measured by UV-Vis
-
Application of Linear Additive Conditions for Near-Infrared Diffuse Reflectance Absorption Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-08-24 Zhiyue Feng, Guimin Cai, Tiancheng Huang, Hubin Liu, Jianhua Zheng, Zengrong Yang, Longlian Zhao, Junhui Li
Determining the homogeneity of material mixing in real time during product processing is critical for quality control. According to the Kubelka–Munk (K-M) function of diffuse reflectance absorption spectrum, absorbance (A) is approximately linear with the content of the components when the sample scattering coefficient (S) is in a certain range. The S is determined by the particle size of powder samples
-
Characterization of Natural Precious Opal Using Modern Spectroscopic Techniques in Ethiopia: The Case from Delanta, South Wollo J. Spectrosc. (IF 2.0) Pub Date : 2022-08-24 Assamen Ayalew Ejigu, Desalegn Gezahegn Ketemu, Sisay Awoke Endalew, Wudu Yimer Assen
The purpose of this study was to conduct characterization of the Delanta natural opals obtained from different mining sites. Characteristics of opals mined from different geological locality were examined. Six opal samples were collected from the main mining sites found in different localities from Delanta district and characterized using Fourier infrared spectroscopy, scanning electron microscopy
-
Correlation between the NMR Chemical Shifts and Thiolate Protonation Constants of Cysteamine, Homocysteine, and Penicillamine J. Spectrosc. (IF 2.0) Pub Date : 2022-08-04 Juliana Ferreira de Santana, Arash Mirzahosseini, Béla Noszál
1H and 13C NMR measurements were carried out to explore anticipated correlations between chemical shifts versus thiolate basicities and redox potentials of cysteamine, homocysteine, penicillamine, and their homodisulfides. All correlations were analyzed and statistically evaluated. The closest correlation was observed for the αCH nuclei concerning 1H and 13C NMR data. Since neither site-specific basicities
-
Detection Storage Time of Mild Bruise’s Loquats Using Hyperspectral Imaging J. Spectrosc. (IF 2.0) Pub Date : 2022-07-12 Zhaoyang Han, Bin Li, Qiu Wang, Akun Yang, Yande Liu
Bruise may cause spoilage, reduce commodity economic value, and give rise to food quality and safety concerns. Therefore, it is crucial to detect whether a loquat is bruised and when it is bruised to save storage and transportation costs. At present, the bruise of loquats is mainly discriminated by the operator’s naked eye, which is affected by personal habits, light intensity, and subjective psychological
-
Characterization and Optical Studies of Hydroxyethyl Cellulose-Copper Oxide Nanocomposites J. Spectrosc. (IF 2.0) Pub Date : 2022-07-08 A. S. A. Alsubaie
In this study, monometallic copper oxide nanoparticles (CuONPs) were synthesized by chemical reduction of copper sulfate (CuSO4) salt through sugar glucose. X-ray diffraction profiles approved the formation of metallic oxide nanoparticles. TEM images showed spherical nanoparticles with an average particle size of 60 nm. The interaction of HEC and copper oxide nanoparticles was investigated by FTIR
-
Rapid Determination of Aflatoxin B1 Contamination in Peanut Oil by Fourier Transform Near-Infrared Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-07-01 Wanqing Yao, Ruanshan Liu, Zhaocheng Xu, Yuling Zhang, Yingming Deng, Hongwei Guo
Aflatoxin B1 (AFB1) contamination in peanut oil brings about a significant threat to human health. A method based on Fourier transform near-infrared (FT-NIR) spectroscopy was developed for qualitative and quantitative analysis of AFB1 contamination in peanut oil. A total of 94 samples were collected in the transmission mode and processed by a derivative and smoothing filter. Principal component analysis
-
A Variable Selection Method Based on Fast Nondominated Sorting Genetic Algorithm for Qualitative Discrimination of Near Infrared Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-06-23 Hubin Liu, Na Liu, Yuhui Yuan, Cihai Zhang, Longlian Zhao, Junhui Li
A reliable and effective qualitative near-infrared (NIR) spectroscopy discrimination method is critical for excellent model building, yet the performance of models built by these methods is highly dependent on valid feature extraction. The goal of feature selection is to associate the selected variables with the property of interest, which many have done successfully. However, many of selection methods
-
Effect of Solvents on the Fluorescent Spectroscopy of BODIPY-520 Derivative J. Spectrosc. (IF 2.0) Pub Date : 2022-06-22 Buthaina Kamel, Moustafa Sayem El-Daher, Wesam Bachir, Amina Ibrahim, Sinan Aljalali
Photodynamic therapy (PDT) is a selective and minimally invasive technique for the treatment of tumors. It includes three components such as photosensitizer, light, and molecular oxygen. The purpose of this work is to investigate the effect of the solvents such as methanol, ethanol, acetone, and water on fluorescent spectroscopy produced by one of the BODIPY derivatives in turbid media. A 520 nm laser
-
Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique J. Spectrosc. (IF 2.0) Pub Date : 2022-06-16 Muhammad Aamir Israr, Qamar Abbas, Sami Ul Haq, Ali Nadeem
We report a compositional analysis of four coal samples collected from different mines in Pakistan and one Chinese brand. The coal samples were pelletized in the form of a disc and irradiated with a focused laser beam of fundamental (1064 nm) and second (532 nm) harmonics of Nd:YAG laser, which produced plasma on the sample surface. The plasma emissions were recorded using a broadband (200–800 nm)
-
Multiscale-Band K-Distribution Model for Molecules in High-Temperature Gases J. Spectrosc. (IF 2.0) Pub Date : 2022-06-15 Lei Shi, Yuyue Zhang, Fangyan Li, Yuefan Du, Bo Yao
Radiation heat transfer plays a dominant role in high-temperature flow field. Rapid and reliable calculation of spectral radiation properties is beneficial for thermal analysis and detection of radiation target. In this paper, a multiscale-band k-distribution model is proposed for the study of radiation properties in high-temperature gases. The accurate absorption coefficients are firstly calculated
-
Spectroscopic Characteristics and Color Origin of Red Tourmaline from Brazil J. Spectrosc. (IF 2.0) Pub Date : 2022-06-06 Ming Li
In the present paper, I report on the spectroscopic study for tourmaline color origin, performed red samples from Minas Geras State, Brazil, by gemological routine testing, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and X-ray photoelectron spectroscopy. The main goal was the analysis of the optical absorption spectra and the chemical states of transition
-
Distributed Compressed Hyperspectral Sensing Imaging Incorporated Spectral Unmixing and Learning J. Spectrosc. (IF 2.0) Pub Date : 2022-05-31 Hua Xiao, Zhongliang Wang, Xueying Cui, Liping Wang, Hongsheng Yang, Yingbiao Jia
Compressed hyperspectral imaging is a powerful technique for satellite-borne and airborne sensors that can effectively shift the complex computational burden from the resource-constrained encoding side to a presumably more capable base-station decoder. Reconstruction algorithms play a pivotal role in compressive imaging systems. Traditional model-based reconstruction approaches are computationally
-
Detection of Adulteration of Panax Notoginseng Powder by Terahertz Technology J. Spectrosc. (IF 2.0) Pub Date : 2022-05-31 Bin Li, Hai Yin, A-kun Yang, Ai-guo Ouyang
The combined terahertz time-domain spectroscopy (THz-TDS) and chemometric technology is used to detect the adulteration of similar substances in Panax notoginseng powder. Four kinds of samples are prepared in the experiment, three kinds of adulterated samples are Panax notoginseng powder adulterating with zedoary turmeric powder, Panax notoginseng powder adulterating with wheat flour, and Panax notoginseng
-
Laser-Induced Fluorescence Studies on Some Edible Oils and Aromatic Frankincense Oil Excited by Blue and Violet Diode Lasers at 447 nm and 405 nm J. Spectrosc. (IF 2.0) Pub Date : 2022-05-30 Kazi Monowar Abedin
Laser-induced fluorescence (LIF) of certain edible oils (olive, mustard, sunflower, corn, sesame, peanut, rice bran, and flaxseed) and one unique aromatic oil (frankincense oil) have been studied using compact blue and violet lasers operating at 447 nm and 405 nm, respectively. LIF studies excited at these wavelengths have not been performed before, to our knowledge. The various features of the obtained
-
Study on the Effect of Apple Size Difference on Soluble Solids Content Model Based on Near-Infrared (NIR) Spectroscopy J. Spectrosc. (IF 2.0) Pub Date : 2022-05-27 Xiaogang Jiang, Mingwang Zhu, Jinliang Yao, Yuxiang Zhang, Yande Liu
Soluble solids content (SSC) is a vital evaluation index for the internal quality of apples, and NIR spectroscopy is the preferred technique for predicting the SSC of apples. Due to the differences in fruits’ sizes, their SSC prediction models have poor robustness and low prediction accuracy, so it is important to eliminate the effects brought by the differences in fruit sizes to improve the accuracy
-
GC-MS and Cellular Toxicity Studies on Smokeless-Tobacco Show Alerting Cytotoxic effect on Human Gingiva and Lung Fibroblasts J. Spectrosc. (IF 2.0) Pub Date : 2022-05-26 M. Ahmed Mesaik, Asaad Khalid, Ashraf N. Abdalla, Shahnaz Sultana, Abdel-Rahman Youssef, Izzaddinn E. Ahmed, Yassin I. Mohammed, Hyder O. Mirghani, Zia ur Rehman, Hassan A. Alhazmi, Mohammed Al Bratty
Smokeless tobacco (SLT) has been reported to have deleterious effects on the health of its users. This study aims to analyze the constituents of locally collected SLT sample extracts (S1–S11) from Tabuk region of Saudi Arabia using GC-MS and investigate their cytotoxic effect on human gingival fibroblasts (hGFs), normal human fibroblasts (MRC5), and two cancer cell lines (HT29 and HepG2) using MTT
-
Nano-Polyoxotungstate [Cu20P8W48] Immobilized on Magnetic Nanoparticles as an Excellent Heterogeneous Catalyst Nanoreactors for Green Reduction of Nitrophenol Compounds J. Spectrosc. (IF 2.0) Pub Date : 2022-05-26 Reza Haddad, Ali Roostaie
In this study, Cu20-polyoxotungstate [Cu20Cl(OH)24(H2O)12(P8W48O184)]25− supported on a magnetic substrate was used as a high-performance green method for the reduction of nitrophenol compounds such as 4-nitrophenol (4-NP) and 2,4,6-trinitrophenol (2,4,6-TNP). [Fe3O4@SiO2-NH2-Cu20P8W48] as heterogeneous magnetic nanocatalyst was synthesized and characterized by FT-IR, SEM, TEM, VSM, and TGA. This nanocatalyst