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International Journal of Spectroscopy最新文献

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Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite 辐照石墨中点缺陷和缺陷团簇的拉曼光谱定量分析
International Journal of Spectroscopy Pub Date : 2012-02-08 DOI: 10.1155/2012/197609
K. Niwase
{"title":"Raman Spectroscopy for Quantitative Analysis of Point Defects and Defect Clusters in Irradiated Graphite","authors":"K. Niwase","doi":"10.1155/2012/197609","DOIUrl":"https://doi.org/10.1155/2012/197609","url":null,"abstract":"We report the development of Raman spectroscopy as a powerful tool for quantitative analysis of point defect and defect clusters in irradiated graphite. Highly oriented pyrolytic graphite (HOPG) was irradiated by 25 keV He","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"22 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2012-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73488156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
QCLAS and CRDS-Based CO Quantification as Aimed at in Breath Measurements 呼吸测量中基于QCLAS和crds的CO量化
International Journal of Spectroscopy Pub Date : 2012-01-18 DOI: 10.1155/2012/894841
J. Nwaboh, S. Persijn, K. Heinrich, Marcus Sowa, P. Hering, O. Werhahn
{"title":"QCLAS and CRDS-Based CO Quantification as Aimed at in Breath Measurements","authors":"J. Nwaboh, S. Persijn, K. Heinrich, Marcus Sowa, P. Hering, O. Werhahn","doi":"10.1155/2012/894841","DOIUrl":"https://doi.org/10.1155/2012/894841","url":null,"abstract":"Laser-spectrometric methods to derive absolute and traceable carbon monoxide (CO) amount fractions in exhaled human breath could be of advantage for early disease detection as well as for treatment monitoring. As proof-of-principle laboratory experiment, we employed intra-pulse and continuous wave (cw) quantum cascade laser spectroscopy (QCLAS), both at 4.6 μm. Additional experiments were carried out applying cw cavity ring-down spectroscopy (CRDS) with a CO sideband laser and a QCL. We emphasize metrological data quality objectives, thatis, traceability and uncertainty, which could serve as essential benefits to exhaled breath measurements. The results were evaluated and compared on a 100 μmol/mol CO level using the two QCLAS spectrometers, and the cw CO sideband laser CRDS setup. The relative standard uncertainties of the pulsed and the cw QCLAS CO amount fraction results were ±4.8 and ±2.8%, respectively, that from the CO sideband laser CRDS was ±2.7%. Sensitivities down to a 3 nmol/mol CO level were finally demonstrated and quantified by means of cw CRDS equipped with a QCL yielding standard uncertainties of about ±2.5 that are exclusively limited by the available line strength figure quality. With this study we demonstrate the achieved comparability of CO quantifications, adhering metrological principles.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"87 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2012-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81212381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Gas Chromatography Electron Ionization Mass Spectral Analysis of Thio Analogues of Pyrimidine Bases: 5-Bromo-2,4-di-o-(m- and p-) chloro- (bromo-)benzylthiouracils and 6-methyluracils 嘧啶基硫代类似物:5-溴-2,4-二- 0 -(m-和对-)氯-(溴-)苄基硫脲嘧啶和6-甲基尿嘧啶的气相色谱-电子电离质谱分析
International Journal of Spectroscopy Pub Date : 2012-01-17 DOI: 10.1155/2012/847676
G. Bartkowiak, E. Wyrzykiewicz, G. Schroeder
{"title":"Gas Chromatography Electron Ionization Mass Spectral Analysis of Thio Analogues of Pyrimidine Bases: 5-Bromo-2,4-di-o-(m- and p-) chloro- (bromo-)benzylthiouracils and 6-methyluracils","authors":"G. Bartkowiak, E. Wyrzykiewicz, G. Schroeder","doi":"10.1155/2012/847676","DOIUrl":"https://doi.org/10.1155/2012/847676","url":null,"abstract":"Electron ionization (EI) mass spectral fragmentation routes of twelve 5-bromo-2,4-di-o-(m- and p-) chloro- (bromo-)benzyl-thiouracils and 6-methyluracils are investigated. The compounds studied are analyzed using gas chromatography/mass spectrometry (GC/MS). Fragmentation pathways, whose elucidation is assisted by accurate mass measurements and metastable transitions, are discussed. Correlation between the abundances of the selected fragment ions of the compounds investigated is discussed. The data obtained make grounds for distinction of structural isomers.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"45 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2012-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89269242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Novel Method for Bacterial UTI Diagnosis Using Raman Spectroscopy 利用拉曼光谱诊断细菌UTI的新方法
International Journal of Spectroscopy Pub Date : 2012-01-12 DOI: 10.1155/2012/195317
E. Kastanos, A. Kyriakides, Katerina Hadjigeorgiou, C. Pitris
{"title":"A Novel Method for Bacterial UTI Diagnosis Using Raman Spectroscopy","authors":"E. Kastanos, A. Kyriakides, Katerina Hadjigeorgiou, C. Pitris","doi":"10.1155/2012/195317","DOIUrl":"https://doi.org/10.1155/2012/195317","url":null,"abstract":"The current state of the art on bacterial classification using Raman and Surface Enhanced Raman Spectroscopy (SERS) for the purpose of developing a rapid and more accurate method for urinary tract infection (UTI) diagnosis is presented. SERS, an enhanced version of Raman offering much increased sensitivity, provides complex biochemical information which, in conjunction with advanced analysis and classification techniques, can become a valuable diagnostic tool. The variety of metal substrates used for SERS, including silver and gold colloids, as well as nanostructured metal surfaces, is reviewed. The challenges in preprocessing noisy and complicated spectra and the various methods used for feature creation as well as a novel method using spectral band ratios are described. The various unsupervised and supervised classification methods commonly used for SERS spectra of bacteria are evaluated. Current research on transforming SERS into a valuable clinical tool for the diagnosis of UTIs is presented. Specifically, the classification of bacterial spectra (a) as positive or negative for an infection, (b) as belonging to a particular species of bacteria, and (c) as sensitive or resistant to an antibiotic are described. This work can lead to the development of novel technology with extremely important benefits for public health.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"32 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2012-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87913279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Raman Spectroscopy at High Pressures 高压下的拉曼光谱
International Journal of Spectroscopy Pub Date : 2012-01-12 DOI: 10.1155/2012/617528
A. Goncharov
{"title":"Raman Spectroscopy at High Pressures","authors":"A. Goncharov","doi":"10.1155/2012/617528","DOIUrl":"https://doi.org/10.1155/2012/617528","url":null,"abstract":"Raman spectroscopy is one of the most informative probes for studies of material properties under extreme conditions of high pressure. The Raman techniques have become more versatile over the last decades as a new generation of optical filters and multichannel detectors become available. Here, recent progress in the Raman techniques for high-pressure research and its applications in numerous scientific disciplines including physics and chemistry of materials under extremes, earth and planetary science, new materials synthesis, and high-pressure metrology will be discussed.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"117 1","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2012-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90713788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 43
Probing Local Environments by Time-Resolved Stimulated Emission Spectroscopy 用时间分辨受激发射光谱探测局部环境
International Journal of Spectroscopy Pub Date : 2012-01-05 DOI: 10.1155/2012/271435
Ana Rei, G. Hungerford, M. Belsley, M. Ferreira, P. Schellenberg
{"title":"Probing Local Environments by Time-Resolved Stimulated Emission Spectroscopy","authors":"Ana Rei, G. Hungerford, M. Belsley, M. Ferreira, P. Schellenberg","doi":"10.1155/2012/271435","DOIUrl":"https://doi.org/10.1155/2012/271435","url":null,"abstract":"Time-resolved stimulated emission spectroscopy was employed to probe the local environment of DASPMI (4-(4-(dimethylamino)styryl)-N-methyl-pyridinium iodide) in binary solvents of different viscosity and in a sol-gel matrix. DASPMI is one of the molecules of choice to probe local environments, and the dependence of its fluorescence emission decay on viscosity has been previously used for this purpose in biological samples, solid matrices as well as in solution. The results presented in this paper show that time-resolved stimulated emission of DASPMI is a suitable means to probe the viscosity of local environments. Having the advantage of a higher time resolution, stimulated emission can provide information that is complementary to that obtained from fluorescence decay measurements, making it feasible to probe systems with lower viscosity.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74585272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Room Temperature Synthesis and Catalytic Properties of Surfactant-Modified Ag Nanoparticles 表面活性剂修饰银纳米颗粒的室温合成及其催化性能
International Journal of Spectroscopy Pub Date : 2012-01-01 DOI: 10.1155/2012/638692
Wei-hua Li, Sun Congtao, B. Hou, Xiaodong Zhou
{"title":"Room Temperature Synthesis and Catalytic Properties of Surfactant-Modified Ag Nanoparticles","authors":"Wei-hua Li, Sun Congtao, B. Hou, Xiaodong Zhou","doi":"10.1155/2012/638692","DOIUrl":"https://doi.org/10.1155/2012/638692","url":null,"abstract":"Well-dispersed Ag nanoparticles with size of 20–30 nm were synthesized in water at room temperature with a self-made novel imidazoline Gemini surfactant quaternary ammonium salt of di (2-heptadecyl-1-formyl aminoethyl imidazoline) hexanediamine. Transmission electron microscopy, X-ray powder diffraction, ultraviolet-visible absorption spectra, and Fourier transform infrared ray were used to characterize the Ag nanoparticles. Results showed that the micellized aggregation of imidazoline Gemini surfactant in water, the growth of Ag initial particles, and the interaction (adsorption and coordination) between surfactant and Ag","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"21 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81425905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Spectroscopic and Structural Insight into the Size-Dependent Behavior of the Nanophase 纳米相尺寸依赖性行为的光谱和结构分析
International Journal of Spectroscopy Pub Date : 2012-01-01 DOI: 10.1155/2012/197064
S. Bera, S. Dhara, A. Milekhin, M. Chu, S. M. Shivaprasad
{"title":"Spectroscopic and Structural Insight into the Size-Dependent Behavior of the Nanophase","authors":"S. Bera, S. Dhara, A. Milekhin, M. Chu, S. M. Shivaprasad","doi":"10.1155/2012/197064","DOIUrl":"https://doi.org/10.1155/2012/197064","url":null,"abstract":"1Water and Steam Chemistry Division, Bhabha Atomic Research Centre Facilities, Kalpakkam 603102, India 2 Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India 3 Institute of Semiconductor Physics, Russian Academy of Sciences, 630090 Novosibirsk, Russia 4Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan 5 Jawaharlal Nehru Centre for Advanced Scientific Research, International Centre for Materials Science and Chemistry, Bangalore 560064, India","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"52 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76393947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vibrational Spectroscopy: Structural Analysis from Molecules to Nanomaterials 振动光谱:从分子到纳米材料的结构分析
International Journal of Spectroscopy Pub Date : 2011-12-19 DOI: 10.1155/2011/795694
A. Aamouche, S. Armenta, Jean‐Valère Naubron, Jean‐Valère Naubron, H. Arslan, R. W. Berg, Chak Keung Chan, M. Iwahashi, L. M. Bodecchi, C. Durante, M. Malagoli, M. Manfredini, A. Marchetti, Xiaojie Wang, B. Mihailova, A. Klocke, S. Heidrich
{"title":"Vibrational Spectroscopy: Structural Analysis from Molecules to Nanomaterials","authors":"A. Aamouche, S. Armenta, Jean‐Valère Naubron, Jean‐Valère Naubron, H. Arslan, R. W. Berg, Chak Keung Chan, M. Iwahashi, L. M. Bodecchi, C. Durante, M. Malagoli, M. Manfredini, A. Marchetti, Xiaojie Wang, B. Mihailova, A. Klocke, S. Heidrich","doi":"10.1155/2011/795694","DOIUrl":"https://doi.org/10.1155/2011/795694","url":null,"abstract":"","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"3 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87790890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Polymer Characterization by Combined Chromatography-Infrared Spectroscopy 色谱-红外光谱联合表征聚合物
International Journal of Spectroscopy Pub Date : 2011-12-18 DOI: 10.1155/2011/694645
J. Dwyer, Minge Zhou
{"title":"Polymer Characterization by Combined Chromatography-Infrared Spectroscopy","authors":"J. Dwyer, Minge Zhou","doi":"10.1155/2011/694645","DOIUrl":"https://doi.org/10.1155/2011/694645","url":null,"abstract":"Infrared spectroscopy is widely used in the analysis and characterization of polymers. Polymer products are not a singular species, but rather, they are a population of polymer molecules varying in composition and configuration plus other added components. This paper describes instrumentation that provides the benefit or resolving polymer populations into discrete identifiable entities, by combining chromatographic separation with continuous spectra acquisition. The technology also provides a way to determine the mass distribution of discrete components across the chromatographic distribution of a sample. Various examples of application of this technology to polymer products are described. Examples include additives analysis, resolution of polymer blends, composition characterization of copolymers, analysis of degradation byproducts, and techniques of analysis of reactive polymer systems.","PeriodicalId":14329,"journal":{"name":"International Journal of Spectroscopy","volume":"64 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2011-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91089773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
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