Journal of Applied Spectroscopy最新文献_第2页

Development and Validation of a Spectrophotometric Method for Quantitative Determination of Total Triterpenoid and Steroid Compounds in Polypore Fungi 多孔真菌中总三萜和甾类化合物的分光光度测定方法的建立与验证

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02060-x

H. I. Harbatsevich, I. A. Komlach

引用次数: 0

Influence of Composition on the Electronic Structure of Manganites R1–xCAxMnO3 (R = Nd, Gd; X = 0.0, 0.2) According to X-Ray Photoelectron Spectroscopy Data 基于X射线光电子能谱数据的成分对锰酸盐R1-xCAxMnO3 （R = Nd, Gd; X = 0.0, 0.2）电子结构的影响

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02058-5

S. Kh. Estemirova

引用次数: 0

Statistics of Stokes Radiation Pulse Energy Under SRS Excitation in Compressed Hydrogen by Two-Pulse Two-Frequency Nd:YAG-Laser Radiation 双脉冲双频Nd: yag激光在压缩氢中SRS激发下Stokes辐射脉冲能量的统计

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02056-7

A. S. Grabtchikov, L. E. Batay, V. A. Orlovich, J. Davaasambuu, H. Tsookhuu, D. Unurbileg, D. Bayartsengel

引用次数: 0

Use of Spectral Methods for the Analysis of Melanin Pigments in Antarctic Yeast Dothiora cannabinae BIM Y-383 利用光谱方法分析南极酵母Dothiora cannabinae BIM Y-383中的黑色素

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02059-4

V. P. Kurchenko, E. A. Gribanova, I. I. Azarko, V. E. Miamin

{"title":"Use of Spectral Methods for the Analysis of Melanin Pigments in Antarctic Yeast Dothiora cannabinae BIM Y-383","authors":"V. P. Kurchenko, E. A. Gribanova, I. I. Azarko, V. E. Miamin","doi":"10.1007/s10812-026-02059-4","DOIUrl":"10.1007/s10812-026-02059-4","url":null,"abstract":"Melanogenesis during cultivation of the Antarctic yeast species Dothiora cannabinae BIM Y-383 was studied using electronic spectroscopy and EPR methods. It was shown that this species synthesizes melanin facultatively at the stages of stationary growth and culture death. Melanin was extracted from yeast mycelium cultivated for 3, 6, 9, 12, and 16 d. Its spectral properties were studied. The isolated and purifi ed pigment was characterized. The melanin content in the extracts on days 3, 6, 9, 12, and 16 of cultivation was calculated from the optical density at 460 nm and was 22.2, 38.3, 42.4, 46.8, 54.9 mg per 1 g of freeze-dried mycelial biomass, respectively. The increase in melanin content during the exponential growth, stationary, and dying stages of D. cannabinae BIM Y-383 culture manifested as an increase in the number of paramagnetic centers in the freeze-dried mycelium. The conducted studies revealed a high correlation between the melanin content in the obtained extracts calculated from its optical density at 460 nm and the content of paramagnetic centers in freeze-dried yeast mycelium samples.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 1","pages":"61 - 68"},"PeriodicalIF":1.0,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New Human CYP17A1 Fluorescent Ligands 新的人类CYP17A1荧光配体

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02062-9

G. N. Nekrasova, Ya. V. Faletrov, V. M. Shkumatov, Ya. V. Dichenko, S. A. Usanov

引用次数: 0

Stability Indicating UV-Visible Spectrophotometric Method for the Estimation of Flunarizine Dihydrochloride Through Second-Order Derivative Spectroscopy 二阶导数光谱法测定盐酸氟桂利嗪的稳定性指示紫外可见分光光度法

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-28 DOI: 10.1007/s10812-026-02075-4

Hemant Ratre, Swati Pandey, Ravindra Kumar Pandey, Shiv Shankar Shukla

{"title":"Stability Indicating UV-Visible Spectrophotometric Method for the Estimation of Flunarizine Dihydrochloride Through Second-Order Derivative Spectroscopy","authors":"Hemant Ratre, Swati Pandey, Ravindra Kumar Pandey, Shiv Shankar Shukla","doi":"10.1007/s10812-026-02075-4","DOIUrl":"10.1007/s10812-026-02075-4","url":null,"abstract":"The presented study is a simple, precise and accurate stability-indicating second-order UV derivative spectroscopic method that is being studied under the different stated International Council for Harmonization (ICH) Guidelines because of its forced-degradation properties, and to establish a validating method for flunarizine dihydrochloride in active pharmaceutical ingredients (API). Adhering to ICH guidelines, the analytical parameters, viz. linearity, range, precision, and accuracy, were validated. The method was based on thorough stress testing utilizing acid, base, thermal, photolytic and oxidative degradations, and it was found that a linear response is present in the concentration range of 10–60 μg/mL at 253 nm. The % relative standard deviation (RSD) for precision studies of interday and intraday were <1.29 and <1.17%, respectively. The developed analytical method for validating flunarizine dihydrochloride using second-order derivative spectroscopy is found to be simple and precise, and the percentage recovery was found to be within acceptable limits. It can be conveniently used for routine analysis. In the forced degradation studies of flunarizine dihydrochloride utilizing various parameters, such as acid, alkali, light and heat, the absorbance of the drug was noted to have decreased approximately 10% in both the formulation and the standard. Based on the results obtained, it was found that the proposed method is accurate, precise, and reproducible, and can be employed for quality control analysis.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 1","pages":"197 - 204"},"PeriodicalIF":1.0,"publicationDate":"2026-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online Detection of the Indoor Air Environment 室内空气环境在线检测

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-27 DOI: 10.1007/s10812-026-02077-2

Wentao Zhou, Lei Zhao, Guangxu Zeng, Dongpeng Tian, Junyi Zhu, Yuzhu Liu

{"title":"Online Detection of the Indoor Air Environment","authors":"Wentao Zhou, Lei Zhao, Guangxu Zeng, Dongpeng Tian, Junyi Zhu, Yuzhu Liu","doi":"10.1007/s10812-026-02077-2","DOIUrl":"10.1007/s10812-026-02077-2","url":null,"abstract":"Nowadays, people spend a significant amount of time living and working indoors. For that, online detection and classification of different indoor air environments is of great importance, which is very challenging because of the lack of unified standards. In this study, a novel classification model based on laser-induced breakdown spectroscopy (LIBS) and machine learning was established to detect indoor air environments. To study different indoor air environments, four different coatings or paints (rubber coating, wood coating, furniture paint, and interior paint) were taken as samples to ascertain the gas composition. The analysis of their spectra shows there are various metal elements in these gas compositions, including Ti, Ca, and Na. For volatile organic compounds (VOCs) present in coatings or paints, the intensities of C, H, and O, which are VOCs’ main ingredients, are compared to determine if there is a certain difference. The results verify that LIBS could be used to detect different indoor air environments. Principal component analysis was used to distinguish the four indoor air environments, and the training data set was stored for further identification. Furthermore, a classification model was established based on the improved error back propagation artificial neural network (BP-ANN), achieving a recognition accuracy of 93.4%. After model training, the model's performance was tested using the spectra of different coatings or paints, and the recognition accuracy reached 98.2%. These results indicate that this method, combining LIBS and machine learning, has great potential for detecting the quality of the indoor air environments.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 1","pages":"216 - 225"},"PeriodicalIF":1.0,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transformation of Phenol in Solid Mixtures with Humic Acids During Electron Beam Irradiation 电子束辐照下腐植酸固体混合物中苯酚的转化

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-27 DOI: 10.1007/s10812-026-02064-7

A. V. Spirina, O. N. Tchaikovskaya, E. N. Bocharnikova, V. I. Solomonov, N. V. Yudina

{"title":"Transformation of Phenol in Solid Mixtures with Humic Acids During Electron Beam Irradiation","authors":"A. V. Spirina, O. N. Tchaikovskaya, E. N. Bocharnikova, V. I. Solomonov, N. V. Yudina","doi":"10.1007/s10812-026-02064-7","DOIUrl":"10.1007/s10812-026-02064-7","url":null,"abstract":"The pulsed cathodoluminescence spectra of solid phenol; humic acids isolated from oxidized brown coal (Mongolia, China), including those subjected to mechanical activation; and mixtures of humic acids with 10, 30, 50, 70, and 90 wt.% of phenol were recorded. The spectra were recorded in the range from 350 to 850 nm with irradiation by an electron beam of 2 ns duration with an average energy of 170 keV. The number of irradiation pulses at a repetition rate of 1 Hz varied from 20 to 4000, while the absorbed dose from one pulse was ~1.4 kGy. It was shown that humic acids did not luminesce, although phenol emission did appear in the mixtures. The degree of phenol transformation in the mixtures under the action of the electron beam was determined by analyzing pulsed cathodoluminescence spectra. An intense band at 375 nm was due to a transition from the phenol T1 triplet state to the S0 ground state. Two bands at 395 and 475 nm were formed by transitions from the T1 state to the first and fourth vibrational levels of the S0 ground state. A long-wavelength band at 740 nm corresponded to a Ti → T1 transition. The behavior of the intensities of all four phenol luminescence bands became extreme, indicative of its transformation, with an increase in the number of irradiation pulses. The interaction of humic acids with phenol occurred through physical adsorption. The presence of humic acids in most samples inhibited the transformation of phenol molecules. The relative positions of the carboxyl functional group and the phenol molecule in the mixtures had an effect.","PeriodicalId":609,"journal":{"name":"Journal of Applied Spectroscopy","volume":"93 1","pages":"103 - 110"},"PeriodicalIF":1.0,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147561747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Surfactants and Static Pressure on Sonoluminescence Brightness for Elemental Analysis 表面活性剂和静压对元素分析声致发光亮度的影响

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-27 DOI: 10.1007/s10812-026-02054-9

T. V. Gordeychuk, M. V. Kazachek

引用次数: 0

Spikeyolo-RS: Improved Spike-Convolution Neural Network for Remote Sensing Image Object Detection Spikeyolo-RS：用于遥感图像目标检测的改进尖峰卷积神经网络

IF 1 4区化学

Journal of Applied Spectroscopy Pub Date : 2026-02-27 DOI: 10.1007/s10812-026-02063-8

Xianyi Wu, Sergey Ablameyko

引用次数: 0