Spectroscopic instrumentation and the absorption characteristics of atmospheric gases are discussed in relation to the requirements of spectroscopic stratospheric experiments. Improvement in the spectral resolution, accuracy of the line parameters, and th...

Absorption and Radiation Activities and Demonstration Video ... This activity investigates the effect surface color has on heat absorption and radiation. ... unit calls for students to build simple spectroscopes to study visible light. ...

Spectroscopic investigations were carried out to provide the physical data base for the evaluation of operational differential-absorption measurements performed with the airborne DIALEX instrument and to identify optimum performance requirements. The meas...

The following are reported: spectroscopic studies of selected actinides in molten dimethyl sulfone; absorption spectrophotometric study of actinide halides under pressure; spectroscopic investigations of americium (V) and (VI) in concentrated aqueous carb...

Spectroscopic methods are proposed for detection of thermal barrier coating (TBC) spallation from engine hot zone components. These methods include absorption and emission of airborne marker species originally embedded in the TBC bond coat. In this study,...

The results of investigations of absorption and emission processes in gases important in upper atmosphere chemistry and physics by a wide variety of spectroscopic techniques are presented. The principle area studied is the vacuum ultraviolet at wavelength...

... Title : A SPECTROSCOPIC MEASUREMENT OF THE RESONANT ABSORPTION OF MICROWAVE ENERGY BY OXYGEN IN THE 2.5 ...

The following spectroscopic methods used to study of liquid crystals have been discussed: infrared, visible and ultraviolet absorption spectroscopy, fluorescence depolarization. Raman scattering, nuclear magnetic resonance and electron paramagnetic resonance. It has been shown, that using these methods the long-range orientational order in uniaxial liquid ...

Four papers are presented which discuss the following: information measures in nonlinear experimental design; information in spectra of collision broadened absorption lines; band analysis by spectral curve fitting; and least squares analysis of Voight sha...

The position and condition of the motion of gas clouds in the Milky Way were investigated using ultraviolet absorption spectroscopic data provided by the International Ultraviolet Explorer (IUE) satellite. The first aim is the investigation of the effect ...

The paper presents absorption spectroscopy investigations of polymorphism of four alcohols: cyclopentanol, cyclohexanol, cycloheptanol and t-butanol in the mid infrared range. The study of cyclohexanol is more extended and included some neutron scattering...

The valence state of neptunium ions in sodium silicate glasses prepared under reducing and oxidizing conditions has been investigated by the x-ray photoelectron, Moessbauer and optical absorption spectroscopic techniques. Results indicate that the Np ions are tetravalent in glasses prepared under reducing conditions and pentavalent in ...

... SPECTROSCOPIC AND THERMODYNAMIC INVESTIGATIONS OF GROUP V HALIDES ... Final INVESTIGATIONS OF GROUP V HALIDES ...

The use of crystals with color centers in quantum electronics increases the timeliness of detailed investigation of their spectroscopic properties. In this article, the absorption and luminescence spectra of neutron-irradiated leucosapphire in the region of 200-800 nm was investigated. The ...

Sep 4, 2011 ... SPICAM will measure the ozone and water content of the atmosphere, the ... The UV sensor is an intensified photon-counting CCD with three pointing ... It will measure water vapor absorption at 1.38 microns with two InGaAs ...

To explore the photophysics of platinum acetylide chromopores having strong two-photon absorption cross-sections, we have investigated the synthesis and spectroscopic characterization of a series of platinum acetylide complexes that feature highly &(numbe...

Investigation of the spectroscopic properties of melanin dissolved in dimethyl sulfoxide (DMSO) is one part of a more expansive study of melanin. The absorption spectrum of melanin dissolved in DMSO differed from the spectrum in acidic or neutral solution...

The report gives results of comparisons of saturated laser-excited molecular fluorescence measurements of CH and CN in atmospheric pressure acetylene flames with absorption measurements of these flame radicals. It was found possible to saturate the fluorescence intensity of both ...

The following is a summary of research accomplishments and progress made during the period September 15, 1985 through September 14, 1988: Development of Spectroelectrochemical and other methodology for alkali chloroaluminates- UV- visible absorption spect...

The dependence of the dichroic ratio of a number of absorption bands of the IR-spectrum of polyacrylonitrile (PAN) within the range of 1000-2300/cm, on the degree of directionalized drawing, was obtained. An experimental correlation between the tensile st...

... Title : Electrochemical and Spectroscopic Investigation of Molten Chloroaluminates and Related Solvents. Descriptive Note : Final technical ...

Using optothermal spectroscopy an investigation is performed of the absorption of the FIR laser molecule acetonitrile (CH3CN) at 63 lines of a tunable waveguide CO2 laser. The results are presented in the form of an atlas which can be used as a reference for further spectroscopic investigations.

Arsenate adsorption on amorphous (RuO2�1.1H2O) and crystalline (RuO2) ruthenium oxides was evaluated using spectroscopic and kinetic methods to elucidate the adsorption mechanism. Extended X-ray absorption fine structure spectroscopy (EXAFS) was ...

Spectroscopic Ellipsometry and Fluorescence Study of Thermochromism in an Ultrathin Poly-0601 Received December 2, 1999. In Final Form: February 18, 2000 We have investigated the thermochromic dramati- cally with various stimuli, namely, UV absorption (photochromism),4-7 heat (thermochromism),8

The sorption and desorption of Pb on RuO2 xH2O were examined kinetically and thermodynamically via spectroscopic and macroscopic investigations. X-ray absorption spectroscopy (XAS) was employed to determine the sorption mechanism with regard to identity of nearest atomic neighbo...

... The spectroscopic absorption of an aromatic compound on a ... behavior of aromatic compounds on soils at the ... to be characteristic of para-substituted ...

A linear and nonlinear optical spectroscopic characterization is carried out on three azo dyes (Reactive orange 1, Reactive violet 8, and Acidproof purplish red), and on N-(p-hydroxybenzylidene)-diamino-maleonitrile. Fluorescence quantum distributions, fluorescence quantum yields, and fluorescence lifetimes are measured. The saturable absorption is studied ...

The absorption spectra of three kinds of magnetic materials in the frequency range of 0~2.0THz has been measured with terahertz time-domain spectroscopyat room temperature in nitrogen atmosphere. Simultaneously, the terahertz refraction, transmission and absorption spectrum of the three kinds of magnetic material are obtained through the experiment. ...

Spectroscope absorption measurements of the stratospheric trace gases hydrogen chloride (HCl) and nitric (HNO3) using a Fourier transform infrared ...

Spectroscope absorption measurements of the stratospheric trace gases hydrogen chloride (HCl) and nitric (HNO3) using a Fourier transform infrared ...

... Title : In Situ Infrared Reflection Absorption Spectroscopic Characterization of Plasma Enhanced Chemical Vapor Deposited SiO2 Films. ...

The low-lying Rydberg and intravalence excited states of formaldehyde, acetaldehyde, and acetone, accessed by multiphoton absorption, have been investigated at ab initio level according to quantum electrodynamical formalisms, by utilizing random-phase-approximation vertical transition energies and amplitudes. For all three carbonyls, two-photon ...

X-ray absorption spectroscopy was used to probe the chemical and structural environment of vanadium in coal. It was found that vanadium exists in at least two environments, in both of which it was coordinated to oxygens. There was no evidence of vanadium in nitrogen (porphyrin) or sulfide environments. It was also found that the vanadium environments in the raw coal did not ...

The absorption spectra of panax notoginseng and glycyrrhiza in the frequency range of 0.2~1.6THz has been measured with terahertz time-domin spectroscopy at room temperature. Simultaneously, the corresponding theoretical spectra were given by using density functional theory methods. It was found that the absorption peaks of the two molecules obtained by ...

The process of two photon absorption between two bound states through a repulsive intermediate state has been investigated by 2+1 multiphoton ionization of molecular chlorine. In these experiments, the first photon goes into a fairly strong repulsive cont...

The effect of UV irradiation of methotrexate was investigated by steady state absorption and fluorescence spectroscopy. Major modifications on absorption bands were detected upon irradiation fluence greater than 59J/cm2. In addition the irradiated solutions become strongly fluorescent. The detected changes are not linear with the ...

This paper reports the X-ray absorption near edge structure (XANES) spectroscopic characterization of the oxidation state of selenium following microbial metabolism of selenite from aqueous solution. Extended X-ray absorption fine structure (EXAFS) measurements of the amorphous red and gray allotropes of elemental selenium are also ...

The purpose of this work is to investigate the contamination of Algiers coast with heavy metals, particularly mercury. The techniques used are PIXE (Particle Induced X-Ray Emission), NAA (Neutron Activation Analysis) and AAS (Atomic absorption Spectroscop...

Operate a simple spectroscope to analyze spectra. ... Students build a simple spectroscope and use it to investigate diffraction. ...

Topics relating to spectroscopic applications of a new generation of metal vapour lasers are discussed. These lasers are distinguished by a high efficiency, compact size, air cooling, and user friendliness. Practical results are given of an investigation of the Raman scattering of light in gallium phosphide, silicon, graphite, and diamond films directly ...

The absorption coefficient spectra of poly(vinyl alcohol), PVA, mixed with methyl red (MR) thin films on glass substrates, prepared by the spin coating method has been investigated using scanning electron microscopy (SEM) and spectroscopic ellipsometry. SEM imaging indicates that the surface of the MR/PVA film is smooth, uniform, and ...

A full IR, UV-Vis, FIR, spectroscopic analysis on substituted porphyrin iron, manganese, cobalt, copper and Zinc complexes was performed, and the spectroscopic patterns were found for the metalloporphyrin compounds with various structures. Base on molecular structures theory, the reasons for the spectroscopic patterns were discussed ...

The ultraviolet absorption and emissions as well as Stokes and anti-Stokes Raman scatterings of spectroscopically pure 5H-dibenzo(a,d)cycloheptene-5-ol were investigated by flash and laser-flash photolysis technique in solution at room temperature and at 77K. The whole spectrum, absorption, excitation, prompt and ...

... ULTRAVIOLET BAND RE-ASSIGNMENT FOR ANILINE AND ITS DERIVATIVES. ... of the ultraviolet absorption spectrum for anilines and derivatives ...

... COMPLEX COMPOUNDS, SPECTROSCOPY, STRUCTURAL PROPERTIES, ABSORPTION, PYRIDINES, PYRAZOLES, INDOLES, BRIDGES ...

... of gases in the atmosphere or elsewhere. ... in which a central control unit is ... ABSORPTION, AUSTRALIA, MULTIPLEXING, SIGNAL GENERATION. ...

Absorption spectra of YAlO{sub 3}:Nd for the three crystallographic axes are investigated at room temperature. The spectral strengths indicate that the absorption coefficient of YAlO{sub 3}:Nd is anisotropic. The anisotropy of the local electric field acting on the rare-earth ion in a laser crystal is considered. An extended ...

This paper presents the results of a spectroscopic study of cumene conversion on H-ZSM-5 zeolite in hydrogen and in vacuum in order to identify the absorption at 400 nm with the spectrum of these ions. Investigations in vacuum made it possible to study the conversion of cumene on the surface of H-ZSM-5 in the absence of hydrogen but in ...

... Accession Number : ADA165431. Title : Spectroscopic Investigations of Organic Molecules on Graphite Surfaces. Descriptive Note : Final rept. ...

... Title : Spectroscopic Investigation of the Argon Metastable State Through Optical Emission From Pulsed Argon Discharge. ...

... Accession Number : ADA214707. Title : Spectroscopic Investigation of Lead Monofluoride. Descriptive Note : Final rept. ...

... TITLE: Infrared spectroscopic investigation of the cis-trans isomerization of the polyester from maleic anhydride-ethylene glycol ...

... Accession Number : AD0851863. Title : A Spectroscopic Investigation of Moving Striations in a Neon Glow Discharge. Descriptive ...

We present an investigation into incorporating core-shell Au-SiO(2) nanoparticles into dye-sensitized solar cells. We demonstrate plasmon-enhanced light absorption, photocurrent, and efficiency for both iodide/triiodide electrolyte based and solid-state dye-sensitized solar cells. Our spectroscopic investigation ...

Maya pigments are hybrid organic/inorganic materials with multiple technology applications that possess unprecedented stability with respect to harsh environment conditions. In this investigation, we address the question of how the organic indigo dye modifies as it binds to the inorganic palygorskite clay to form a pigment similar to Maya Blue after a heating treatment is ...

Spectroscopic temperature measurements during the interior ballistic cycle of a 20 mm test fixture gun and inside the muzzle flash of a 7.62 mm rifle are described. The investigation yields information on temperature distribution in the burning propellant charge of the 20 mm test fixture and on radial temperature profiles in the 7.62 mm muzzle flash ...

Space-based active sensing of CO(2) concentration is a very promising technique for the derivation of CO(2) surface fluxes. There is a need for accurate spectroscopic parameters to enable accurate space-based measurements to address global climatic issues. New spectroscopic measurements using laser diode absorption spectroscopy are ...

The luminescence of AgBr and AgBrCl crystals doped with Pr(3+) rare-earth ions was investigated in the visible and infrared spectral ranges. We measured the excitation, emission, and absorption spectra as well as the kinetic parameters over a broad temperature range. The strong influence of the silver halide composition on Pr(3+) ions ...

The mechanism of formaldehyde-protein interactions was investigated by determining the effects of formaldehyde on the common protein bovine serum albumin (BSA). The effects at the molecular level were determined by fluorescence, ultraviolet absorption, and circular dichroism (CD) spectrometry. Formaldehyde could decrease the amount of alpha-helix, leading ...

PRECISION RADIAL VELOCITIES OF DOUBLE-LINED SPECTROSCOPIC BINARIES WITH AN IODINE ABSORPTION CELL October 15; accepted 2005 February 25 ABSTRACT A spectroscopic technique employing an iodine absorption precision velocities of the spectroscopic double-lined binary HD 4676 to dem- onstrate

Experimental measurement and theoretical analysis of THz spectrum for methylenedioxy amphetamine are introduced. The refractive index and absorption coefficient of the sample were observed by terahertz time-domain spectroscopy (THz-TDS) technique in the range of 0.2~2.6 THz. It exhibits obvious absorption feature at 1.40 THz and weak THz ...

Spectroscopic Databases to Support Extrasolar Planet Modeling ... Line List Database: Brown and Butler have worked to collect line lists and absorption ...

The adsorption of Yeast Cytochrome c (YCC) on well defined, flat gold substrates has been studied by Spectroscopic Ellipsometry (SE) in the 245-1000nm wavelength range. The investigation has been performed in aqueous ambient at room temperature, focusing on monolayer-thick films. In situ ?? and ?? difference spectra have shown reproducibly well-defined ...

The potential application of near-infrared spectroscopic imaging technologies in the field of medical diagnosis for observing the sweat distribution on the skin was considered, which is based on the absorption characteristics of water to light energy at the wavelength of 1.94 micrometers . This is an approach on applications of optical sensing technologies ...

Self-assembled monolayers (SAMs) on gold substrates were prepared from benzylmercaptan (BM) and para-cyanobenzylmercaptan (pCBM), and the resulting surfaces were investigated using conventional infrared reflection-absorption spectroscopy (IRRAS) as well as polarization modulation infrared reflection-absorption spectroscopy (PM-IRRAS). ...

Photothermal beam deflection (PTBD) spectroscopy using a free-electron laser (FEL) as a coherent pulsed pump source was applied for recording infrared spectra of actinide molecule complexes. We demonstrate that reliable spectra of samples containing uranyl and neptunyl compounds can be obtained in the mid-infrared region which was verified by conventional FT-IR spectroscopy. Since photothermal ...

This study examines the design, construction, and performance of a spectrometer that was designed and built for UV-visible absorption spectroscopic studies in molten salt media. Contrary to previous designs in the literature, the authors found that furnace and chemical components can be located away from the instrument and electronics. In studying the ...

The terahertz spectra of four kinds of vitamins are presented. The refractive index and absorption spectra of these vitamins are obtained by the terahertz time-domain spectroscopy. The full-geometry optimizations and frequency calculations using the density functional theory are applied to obtain the structure and vibration frequencies of these vitamin molecules. The ...

We have obtained high-resolution Ca II and Na I absorption-line spectra toward 68 OB stars in the direction of the Vela supernova remnant. The stars lie at distances of 190-2800 pc as determined by Hipparcos and spectroscopic parallax estimations. The presence of high-velocity absorption attributable to the remnant along some of the ...

An electrical signal, resulting from discrete optical absorptions, has been observed for a variety of elements, including several for which such an effect had not been previously reported. In the present case, the effect is observed as a change in the voltage across a gas discharge tube produced by irradiation with a laser tuned to the wavelength of a transition of a species ...

Electronic Absorption Spectra of C3Cl, C4Cl, and Their Ions in Neon Matrices Jennifer van been recorded in 6 K neon matrices following mass selection. Ab initio calculations were performed of the longer chainssC5Cl, C5Cl+, C6Cl, and C6Cl+swere reported in neon matrices.15 Spectroscopic investigations

Two classes of substances which may be used in the treatment of malignant tumors in ophthalmology are studied from the point of view of their spectroscopic properties: synthetic porphyrines such as TNP, TPP, TSPP and Zn-TSPP and cytostatics such as 5-fluorouracil. The absorption, excitation and fluorescence spectra of the porphyrins are measured in water ...

Metal speciation of phosphate and metal-phosphate interactions can be investigated by molecular-scale X-ray absorption near edge structure (XANES) spectroscopic analysis. Much of the effort, however, has been focused on inorganic P speciation (i. e. metal-orthophosphate interactions). Phytate (inosi...

Several oxidation states of neptunium and plutonium, Pu(III), Pu (IV), Pu(VI), Np(IV), Np(V) and Np (VI), were studied in glasses prepared by a sol-gel technology. The oxidation state of these actinides was determined primarily by absorption spectrometry ...

Singlet-triplet intersystem crossing of methylene in perfluorohexane solution has been investigated by CIDNP. Evidence of this process is shown by the polarized absorption H-NMR signal of C1 3C-CH 2D, a triplet product, which is obtained upon direct irrad...

We report on a new sustainable approach to modulate the morphological and optical properties of aqueous colloids of gold nanorods by engineering of their overgrowth kinetics in the original pot. The overgrowth is realized by a fine control over the reduction of the gold ions which are left unreduced in the primal synthesis. We show the possibility to modify the intensity and position of the ...

The vertical excitation energy for the lowest valence ?-->?* transition of cyclopentadiene is investigated. Using a combination of high-level theoretical methods and spectroscopic simulations, the vertical separation at the ground state geometry is estimated to be 5.43+/-0.05 eV. This value is intermediate between those calculated with coupled-cluster ...

Ligand K-edge X-ray absorption spectroscopy (XAS) has been developed as a technique for the investigation of ligand-metal bonding and has been applied to the study of electronic structure in organic model complexes and metalloprotein active sites. Ligand ...

The infrared spectroscopy and rovibrational dynamics of HCl and DCl dopants in solid parahydrogen (PH2) were investigated using high-resolution spectroscopic methods. The absorption spectra of HCl and DCl monomers in solid pH2 closely resemble the corresp...

Absorption and luminescence spectra of Me7Eu2UO2(PO4)5 crystals (Me represents Na, Rb, or Cs) are investigated. It is established that the luminescence of Eu3+ ions in these crystals is sensitized by uranyl. The effect of the outer-sphere cation Me+ on the spectroscopic properties and structural features of the compounds under study is ...

Fe-K-edge X-ray absorption spectroscopy (XAS) has been used to investigate the electronic and geometric structure of the iron active site in non-heme iron enzymes. A new theoretical extended X-ray absorption fine structure (EXAFS) analysis approach, called GNXAS, has been tested on data for iron model complexes to evaluate the utility ...

Active catalytic phases (metal, mixed metals, oxide or mixed oxides) interacting with oxide support on which the active phase is dispersed can affect the percentage exposed, the morphology of supported particles, the degree of reducibility of cations, etc., in a variety of ways. Our objective is to characterize the physical chemistry of the active phase-oxide support interaction by ...

... ADP013054 TITLE: Theoretical Investigation of Intraband Absorption of Electromagnetic Radiation by Holes in Quantum Wells ...

... Accession Number : AD0717189. Title : Investigation of Ultrasonic Nebulization for Atomic Absorption Spectrophotometry. ...

... Accession Number : AD0233726. Title : IONOSPHERIC ABSORPTION INVESTIGATIONS AT HAWAII AND JOHNSTON ISLAND. ...

... Title : INVESTIGATIONS OF ABSORPTION AS A FUNCTION OF AIR PRESSURE AT THE WAVELENGTHS OF 029, 036 AND 045 MILLIMETERS ...

... Accession Number : AD0619963. Title : INVESTIGATION OF NARROW LINE ABSORPTIONS IN SINGLE CRYSTAL CALCITE. ...

... Title : AN INVESTIGATION OF STRAIN-ENERGY ABSORPTION POTENTIAL AS THE CRITERION FOR DETERMINING OPTIMUM REACTOR ...

Au L(3)-edge X-ray absorption spectroscopic measurements were carried out over a series of mesoporous and microporous materials containing gold nanoparticles to investigate the effects of the host matrix and preparation methods on the properties of gold nanoparticles. The materials of structure type MCM-41, ZSM-5, SAPO-18 and LSX with ...

Apr 7, 2011 ... Student Lab Investigation investigates the properties of spectroscopes and uses spectroscopes to investigate a variety of light sources. ...

The temperature in the strong absorbing cloud surrounding the luminous propellant gas near the mouth of a rifle was measured as a function of time using emission and absorption spectroscopic techniques. The strong absorption in the cold part of the gas cl...

... resonance (EPR), and (7)Li solid state nuclear magnetic resonance (NMR ... extended x-ray absorption fine structure shows that the local symmetry of ...

In this presentation I will report a strongly interacting new dendrimer system with an extended spectroscopic unit (coherent domain) beyond the trimer configuration. Strong cooperative enhancement of two-photon absorption cross-section was observed when going from the trimer arrangement to the next generation. Combination of a variety of femtosecond ...

Spectroscopic investigations on optical absorption spectra of Dy3+ ions in zinc borosulphate (ZnBS:ZnSO4.7H2O+B2O3) and alkali zinc borosulphate (RZnBS:R2SO4+ZnSO4.7H2O+B2O3, R2SO4=Li2SO4.H2O, Na2SO4 or K2SO4) glasses have been carried out. The observed spectra have been analysed in terms of a parametrized model Hamiltonian consisting ...

... INVESTIGATION OF THE CIS-TRANS ISOMERIZATION OF THE POLYESTER FROM MALEIC ANHYDRIDE-ETHYLENE GLYCOL. ...

... Title : An Investigation of the Structure of Polyacrylonitrile by a Method of Experimental Correlations between the IR-Spectroscopic and Strength ...

Spectral line parameters that have absorption features within the HCl and HF channels of the Halogen

... The Ultraviolet Reflection-Absorption Spectroscopy (UVRAS) method has important advantages for in-situ studies of processing environments. ...

... GLASS, IONS, SYMPOSIA, AMORPHOUS MATERIALS, LIGHT TRANSMISSION, ABSORPTION SPECTRA, LUMINESCENCE, SAMARIUM, ...

... Report Date : 30 JUN 1970. Pagination or Media Count : 52. Abstract : The absorption spectra of mercury in argon, krypton, xenon, and nitrogen ...

The effective level of line formation for spectroscopic absorption lines has long been regarded as a

... A theoretical model to include self absorption by heme-molecules has been developed to understand the spectroscopic differences between ...