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Probing the structure of 'hematoporphyrin derivative' via fluorescence and absorbance spectroscopy. 用荧光和吸光度法研究“血卟啉衍生物”的结构。
Journal of the Spectroscopical Society of Japan Pub Date : 1990-06-30 DOI: 10.5111/BUNKOU.39.164
D. Kessel
{"title":"Probing the structure of 'hematoporphyrin derivative' via fluorescence and absorbance spectroscopy.","authors":"D. Kessel","doi":"10.5111/BUNKOU.39.164","DOIUrl":"https://doi.org/10.5111/BUNKOU.39.164","url":null,"abstract":"Spectral properties of the tumor-localizing dimer/oligomer fraction of HPD and of several diporphyrin ethers were assessed by fluorescence and absorbance spectroscopy in different solvents and after accumulation by leukemia L1210 cells in vitro. Joining 2 porphyrins by an ether linkage caused a blue shift in the Soret bands of the dimers, but not monomers, when the dielectric constant of the solvent was lowered. The presence of ether linkages was assciated with enhanced fluorescence at 630-640 nm and decreased fluorescence lifetimes and fluorescence yields. The joining of two mesoporphyrin or protoporphyrin mole cules by an ether linkage reduced dye accumulation by L1210 cells, but makedly promoted uptake of the hematoporphyrin analog.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124070216","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
Characteristics of Escape Probabilities in Single-and Two-Color Multiphoton Ionization of Anthracene in n-Alkanes 正构烷烃中蒽的单色和双色多光子电离逃逸概率特征
Journal of the Spectroscopical Society of Japan Pub Date : 1990-06-30 DOI: 10.5111/BUNKOU.39.169
S. Yamada
{"title":"Characteristics of Escape Probabilities in Single-and Two-Color Multiphoton Ionization of Anthracene in n-Alkanes","authors":"S. Yamada","doi":"10.5111/BUNKOU.39.169","DOIUrl":"https://doi.org/10.5111/BUNKOU.39.169","url":null,"abstract":"Single-and two-color multiphoton ionization of anthracene have been compared in n- alkane solvents. The simultaneous action of 10-ns laser lights at 355 (UV) and 1064 nm (IR) gave a substantially larger time-integrated photocurrent signal (thus, the escape probability of a geminate cation-electron pair based on the Onsager model) as compared with that obtained when the UV light acted alone. It is suggested that the IR light acts through the geminate cation-electron pair to give its longer thermalization distance. For a solvent with higher electron mobility, escape probabilities for both photoionization methods tended to belarger but the relative increase in the escape probability by the additional action of the IR light tended to be smaller.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128464252","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
Application of a Rapid Scanning Spectrometer to Study on Behaviors of Mn Atoms and Ions in an Ar-He Capacitively Coupled Microwave Plasma 应用快速扫描光谱仪研究Ar-He电容耦合微波等离子体中Mn原子和离子的行为
Journal of the Spectroscopical Society of Japan Pub Date : 1989-12-31 DOI: 10.5111/BUNKOU.38.425
K. Kitagawa, K. Usami
{"title":"Application of a Rapid Scanning Spectrometer to Study on Behaviors of Mn Atoms and Ions in an Ar-He Capacitively Coupled Microwave Plasma","authors":"K. Kitagawa, K. Usami","doi":"10.5111/BUNKOU.38.425","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.425","url":null,"abstract":"A rapid scanning spectrometer with a rotating grating which was directly driven by a synchronous motor was applied to a study on behaviors of Mn atoms and ions in an Ar-He capacitively coupled microwave plasma used for atomic emission spectrometry. A wave length range from 200 to 800 nm (the first order) were scanned within 0.2 sec during a rotation of the grating (30 rpm). Two atomic emission lines and two ionic ones of Mn were observed to estimate excitation temperatures, degree of ionization and total number of atoms and ions. These parameters notably changed in magnitude with plasma gas composition and concentration of Li or Na as a matrix.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127092356","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
A Thermal Vaporizer-Capacitively Coupled Microwave Plasma System for Trace Hg Determination 热汽化器-电容耦合微波等离子体系统测定痕量汞
Journal of the Spectroscopical Society of Japan Pub Date : 1989-08-31 DOI: 10.5111/BUNKOU.38.282
K. Kitagawa, N. Nishimoto
{"title":"A Thermal Vaporizer-Capacitively Coupled Microwave Plasma System for Trace Hg Determination","authors":"K. Kitagawa, N. Nishimoto","doi":"10.5111/BUNKOU.38.282","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.282","url":null,"abstract":"A system has been constructed, which couples a new type of thermal vaporizer to a capacitively coupled microwave plasma (CMP). It is used to determine trace levels of Hg in water. A sample solution of 2-7ml is jetted onto a fused silica wool heated to 630-945°C and thermally vaporized. A large volume of the resulting steam is removed by a highly efficient double coaxial wall condenser. The desolvated mercury solute enters the CMP; 253.65 nm emission is monitored. Basic system characteristics studied include vaporizer temperature, gas flow rates, detection limits, dynamic range and matrix effects. Linear calibration curves are obtained for concentrations ranging from 1 to 1000 μg/l.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123209346","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: 2
Optical Emission Spectroscopy for the Determination of Electron Energy Distribution Function in a He-Ar Glow Discharge Plasma 发射光谱法测定氦氩辉光放电等离子体中电子能量分布函数
Journal of the Spectroscopical Society of Japan Pub Date : 1989-08-31 DOI: 10.5111/BUNKOU.38.300
Manabu Yamamoto, Takeshi Sato, Y. Takubo
{"title":"Optical Emission Spectroscopy for the Determination of Electron Energy Distribution Function in a He-Ar Glow Discharge Plasma","authors":"Manabu Yamamoto, Takeshi Sato, Y. Takubo","doi":"10.5111/BUNKOU.38.300","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.300","url":null,"abstract":"The electron energy distribution function in a helium-argon glow-discharge plasma was estimated from the absolute intensities of the Ar (I), Ar (II), He (I), and He (II) lines. By dividing the electrons into groups of different energy in accordance with the excitation thresholds of these lines, the fractional number density of electrons distributed to each region was determined so that the calculated rate of electron impact excitation was in agreement with the measured radiative transition rate.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114480192","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: 3
Excitation Temperature Measurements of a Pulse-Operated Argon Microwave-Induced Plasma 脉冲氩微波等离子体的激发温度测量
Journal of the Spectroscopical Society of Japan Pub Date : 1989-08-31 DOI: 10.5111/BUNKOU.38.288
M. Mohamed, T. Uchida, D. Coleman, S. Minami
{"title":"Excitation Temperature Measurements of a Pulse-Operated Argon Microwave-Induced Plasma","authors":"M. Mohamed, T. Uchida, D. Coleman, S. Minami","doi":"10.5111/BUNKOU.38.288","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.288","url":null,"abstract":"The present study reports time-and spatially-dependent emission intensities and corresponding excitation temperatures for a pulse-operated argon microwave-induced plasma. These measurements were made at a variety operating conditions. Excitation temperatures were determined using argon, copper, and iron as thermometric species. Observed temperatures show significant differences with respect to each other. Argon emission lines exhibit a pronounced afterglow enhancement which is not observed for analytical lines. The relation-ship between excitation temperature and afterglow enhancement was studied. Excitation temperature was found to decrease suddenly at the falling edge of the microwave pulse.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131582000","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: 3
4, 4'-ジヒドロキシビフェニルの光酸化により生じるフリーラジカル 4，4'-二羟基联苯光氧化产生的自由基。
Journal of the Spectroscopical Society of Japan Pub Date : 1989-08-31 DOI: 10.5111/BUNKOU.38.273
敏彦 星, 勲 小野, 潤 大窪, 誠一 田辺, 適夫 小林
{"title":"4, 4'-ジヒドロキシビフェニルの光酸化により生じるフリーラジカル","authors":"敏彦 星, 勲 小野, 潤 大窪, 誠一 田辺, 適夫 小林","doi":"10.5111/BUNKOU.38.273","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.273","url":null,"abstract":"Photolysis of 4, 4'-dihydroxybiphenyl (BPH2) gave a cation radical (BPH2+·), 4-hydroxy-4'-biphenoxyradical (BPH·) and the conjugate base (BP-·) of BPH· in EPA at 77K. The absorption spectra of the radicals were measured in a wide wavelength region, 350-1000 nm, and the first electronic absorption bands of BPH2+·, BPH· and BP-·. are at 620, 649 and 787 nm, respectively. Irradiation of BPH2 in poly (vinyl alcohol) film at 103 K afforded the mixture of BPH2+· and BP-· BPH2 changed to BP-· predominantly with increasing temperature. The first bands of BPH2+.(640nm) and BP-· (823nm) are polarized along the longer molecular axes. The first transition of BPH2+· corresponds to the transitson from the half-occupied orbital to the lowest vacant orbital, and is interpreted as an intramolecular charge transfer one from the two oxygen atoms to the biphenyl skeleton. The first transition of BP-· corresponds to the transition from the highest occupied orbital to the half-occupied one.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127136896","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
An Inductively Heated Furnace with Plasma for Trace Analysis of Elements by Atomic Emission Spectrometry 原子发射光谱法分析痕量元素的等离子体感应加热炉
Journal of the Spectroscopical Society of Japan Pub Date : 1989-06-30 DOI: 10.5111/BUNKOU.38.209
K. Kitagawa, S. Katoh, M. Yanagisawa
{"title":"An Inductively Heated Furnace with Plasma for Trace Analysis of Elements by Atomic Emission Spectrometry","authors":"K. Kitagawa, S. Katoh, M. Yanagisawa","doi":"10.5111/BUNKOU.38.209","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.209","url":null,"abstract":"For trace elemental analysis of a small volume sample by atomic emission spectrometry (AES), an inductively heated furnace with a plasma (IHF/P) is tentatively constructed and its basic characteristics are studied. A glassy carbon tube, in which a small volume of sample (a few μl) is loaded, is located in an rf coil and inductively heated. A discharge plasma is concurrently formed around the heated glassy carbon tube. The sample vaporization in the heated tube is followed by the excitation in the resulting rf-discharge plasma.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133996946","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
Simple Nitrogen-Purged Optical System for Atmospheric Pressure Helium Microwave Induced Plasma Atomic Emission Spectrometry in the Vacuum Ultraviolet Spectral Region 真空紫外光谱区用于常压氦微波诱导等离子体原子发射光谱的简单氮气净化光学系统
Journal of the Spectroscopical Society of Japan Pub Date : 1989-06-30 DOI: 10.5111/BUNKOU.38.205
T. Nakahara, S. Yamada, T. Wasa
{"title":"Simple Nitrogen-Purged Optical System for Atmospheric Pressure Helium Microwave Induced Plasma Atomic Emission Spectrometry in the Vacuum Ultraviolet Spectral Region","authors":"T. Nakahara, S. Yamada, T. Wasa","doi":"10.5111/BUNKOU.38.205","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.205","url":null,"abstract":"A simple nitrogen-purged optical system has been developed to measure spectral lines in the vacuum ultraviolet (VUV) region by microwave induced plasma atomic emission spectrometry (MIP-AES). For this purpose, both a monochromator and an optical path between an MIP source and an entrance slit of a spectometer are purged with nitrogen to reduce light absorption by oxygen. This system allows measurement of the emission lines in a VUV spectral region between 170 and 190nm. This system has been successfully coupled with a continuous-flow iodine generation technique as a means of sample introduction into an at-mospheric pressure He-MIP for the determination of iodine by AES in the VUV region of the spectrum.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122572151","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
Correction of Physical Interference in a Nebulizer for Atomic Absorption Spectrometry Using the Fraunhofer Diffraction 用弗劳恩霍夫衍射法校正原子吸收光谱雾化器中的物理干扰
Journal of the Spectroscopical Society of Japan Pub Date : 1989-06-30 DOI: 10.5111/BUNKOU.38.187
K. Kitagawa, M. Okuyama
{"title":"Correction of Physical Interference in a Nebulizer for Atomic Absorption Spectrometry Using the Fraunhofer Diffraction","authors":"K. Kitagawa, M. Okuyama","doi":"10.5111/BUNKOU.38.187","DOIUrl":"https://doi.org/10.5111/BUNKOU.38.187","url":null,"abstract":"The Fraunhofer diffraction of laser radiation by droplets has been applied to the correction of the physical interference which is often encountered in a nebulizer used for atomic ab sorption spectrometry (AAS). In this study the systematic errors found in previous study are minimized by narrowing the laser beam and estimating more correctly the net back ground intensity included in the diffraction image. By this modification, the correction of the physical interference of viscous H2SO4 in the AAS determination of Cu is successfully made at concentrations of up to 4 M H2SO4.","PeriodicalId":199016,"journal":{"name":"Journal of the Spectroscopical Society of Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126271863","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
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