... The spectroscopic absorption of an aromatic compound on a ... behavior of aromatic compounds on soils at the ... to be characteristic of para-substituted ...
DTIC Science & Technology
... 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, ...
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. ...
NASA Website
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...
National Technical Information Service (NTIS)
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,...
Operational factors in the use of atomic absorption spectroscopy have been studied on a collaborative basis for use with steelworks materials. Sensitivity, limit of detection and noise level, instrument drift, and calibration procedures have each been exa...
by size and shape. Our studies of diamondoids, using synchrotron-based x-ray absorption, photoemission, and other spectroscopic techniques have been focused in two areas....
Science.gov Websites
... n-photon absorption -lonization level ^rstimulated emission \\ -Resonance level quenching one-photon fluorescence :���� Ground level ...
This report summarizes a range of work, both theoretical and experimental, involving the spectroscopy of the diatomic halogens in the gas phase. Included are 1) Analysis of absorption, fluorescence, and emission spectra -- both discrete and diffuse -- of ...
bullet, Sun-Earth Interactions. bullet, Terrestrial Hydrosphere ... The aim of this study was to better understand the annual cycle of chlorine and ... ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > HYDROGEN CHLORIDE ...
... reduced form of the amphiphile and have been examined with in situ Fourier Transform Infrared Reflection Absorption Spectroscopy (FTIRRAS). ...
... Title : A SPECTROSCOPIC MEASUREMENT OF THE RESONANT ABSORPTION OF MICROWAVE ENERGY BY OXYGEN IN THE 2.5 ...
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...
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 ...
NASA Astrophysics Data System (ADS)
A spectroscopic study of the 2p-3d absorption transitions in germanium is reported. Radiative transition and autoionization probabilities were calculated by a simulation code, as well as the wavelengths of the transitions. The absorption coefficients as a...
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 glasses prepared ...
DOE Information Bridge
The report describes spectroscopic studies of DNA which were undertaken to better understand a physical basis for microwave absorption by this molecule. Three types of studies are described. (1) The low frequency scattered light spectrum of DNA was studie...
This report describes spectroscopic studies of DNA which were undertaken to better understand a physical basis for microwave absorption by this molecule. hree types of studies are described. ) The low frequency scattered light spectrum of DNA was studied by two methods. irst, Ram...
EPA Science Inventory
) intramolecular proton transfer (ESIPT). A detailed analysis of the transient absorption measurements resolved fluorescence up-conversion and transient absorption spectroscopy. The observation of dual-resolved transient absorption spectroscopy and fluorescence up-conversion spectroscopy study of carminic acid
E-print Network
High Sensitivity Absorption Spectroscopy (HSAS) was used to study the C2 radical density in a hydrogen deficient Chemical Vapor Deposition (CVD) system for growing nanocrystalline diamond films. This work was performed in a collaboration between the Unive...
We have studied the spectroscopy of OH and have made accurate determination of many physical parameters which are needed in deducing OH concentrations from absorption and fluorescence measurements. The question of ozone interference in fluorescence measur...
Some data on characterization and spectroscopic studies of radiation emission and absorption of Nd(sup 3+) and Eu(sup 3+) complexes are evaluated. New niobium (V) luminescent compounds are synthesized and the effect on groups of niobium on emission system...
Recent progress in spectroscopic, photophysical, photochemical and analytical studies, as well as in the biological and biomedical properties of bioactive phenothiazines and benzophenothiazines, is reviewed. Their electronic absorption and luminescence properties, and their complexation and interactions in organized media are ...
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 ...
X-ray absorption spectroscopy (XAS) is a useful tool for obtaining structural and chemical information about the active sites of metalloproteins and metalloenzymes. Information may be obtained from both the edge region and the extended X-ray absorption fi...
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...
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. ...
Electrochemical and spectroscopic studies of neptunium, plutonium, americium, californium, and terbium in concentrated aqueous carbonate and carbonate-hydroxide solutions have been carried out. Changes in the absorption spectra of Np(VII), Np(V), Pu(VI), ...
The adsorption of ethylene and acetylene on a rare-earth-metal surface, Gd(0001), has been studied primarily by ultraviolet photoemission and Auger electron spectroscopes. Both species adsorb dissociatively on the clean Gd(0001) surface at 165 K to form a...
Mononuclear and tetranuclear zinc benzenethiolate complexes are studied by both spectroscopic and electrochemical methods. Zn(SPh)4 2- and Zn4(SPh)102- represent tetrahedral fragments of the cubic zinc sulfide lattice. The structured absorption spectra of...
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
We report the spectroscopic detection of H2O ice on Triton, evidenced by the broad absorptions in the near infrared at 1.55 and 2.04 micron. The detection on Triton confirms earlier preliminary studies (D. P. Cruikshank, R. H. Brown, and R. N. Clark, Icar...
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 transient absorption decay times of tetraphenylbutadiene (TPB) and tetraphenylmethylbutadiene (TPMB) are measured as a function of solvent viscosity and of probe wavelength. The TPB spectra suggest that after excitation, TPB relaxes to the bottom of t...
catechol and isonicotinic acid. Whereas the isonicotinate is always adsorbed in a bridging monodentate mode, four different adsorption modes of catechol have been identified. The particles show a significantly a moderate dependence of the catecholate net charge on the geometry of adsorption. All of the catechol
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...
Electrochemical and spectroscopic studies of some lanthanide salts in molten dimethyl sulfone (DMSO sub 2 ) at 400 K have been carried out. Differences in the DMSO sub 2 versus aqueous solution absorption spectra of trivalent Eu, Yb, and Sm and divalent E...
Energy shifts and bandwidths for the optical absorption of benzene in supercritical nitrogen are presented as a function of pressure, temperature, and density. The pressure and density dependence of energy shifts of room temperature emission of benzene in...
Some previous studies of polyaniline, or (phiN)x, using infrared spectroscopy, X ray photoelectron spectroscopy and NMR, are reviewed. New results involving the optical absorption spectra of free standing, electrochemically prepared (phiN)x, in both in th...
Spectroscopic studies with ground-based telescopes at low resolution can give compositional information of the surfaces and atmospheres of planets, satellites, asteroids, and comets. Solid state absorptions in ices and minerals are measurable by the low-r...
We will correlate the presence/absence of emission and absorption features in the energy spectrum of Chandra (and XMM-Newton) with timing properties ...
Much effort has been devoted to the development of sensitive spectroscopic techniques for the study of actinide speciation based on the sensitivity of f-f electronic absorption bands to oxidation state and ligation of the actinide ions. These efforts assu...
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...
Detailed spectroscopic studies of Chromium in mullite ceramics are presented. An enormous broadening of absorption and emission spectra, highly nonexponential luminescence decays and luminescence line narrowing suggest a large inherent inhomogeneity of th...
Optical absorption spectra and magnetic moments were obtained from paramagnetic susceptibility measurements for hemoglobin, myoglobin, and peroxidase. Mossbauer scattering experiments were performed to study the bonding in ferrihemoprotein hydroxides. (R.E.U.)
Energy Citations Database
We have studied the formation of self-assembled monolayers (SAMs) of n-alkanethiols on platinum thin films using X-ray photoelectron spectroscopy (XPS), reflection-absorption infrared spectroscopy (RAIRS), spectroscopic ellipsometry (SE), and contact angl...
An optical spectroscopic characterization is carried out on a reactive dye (reactive orange 1). This dye is widely applied in textile coloration. It is a potential candidate for photonics applications. Its absorption cross-section spectra are measured. A fluorescence spectroscopic characterization is undertaken by measuring the ...
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 properties and dynamics of the lowest excited singlet states of peridinin, fucoxanthin, neoxanthin, uriolide acetate, spheroidene, and spheroidenone in several different solvents have been studied by steady-state absorption and fast-transient optical spectroscopic techniques. Peridinin, ...
The dinuclear iron center of the hydroxylase component of soluble methane monooxygenase (MMO) from Methylococcus capsulatus and Methylosinus trichosporiwn has been studied by X-ray absorption spectroscopy. Analysis of the Fe K-edge EXAFS revealed that the...
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. ...
... 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. ...
... SPECTROSCOPIC STUDY OF THE PHYSICAL ADSORPTION OF XENON AND THE CHEMISORPTION OF OXYGEN ON TUNGSTEN (111). ...
... the title 'Spectroscopic Studies of Chemical Adsorption and ... species and of reactions on these ... spectroscopy, photoelectron yield spectroscopy and ...
... Title : SPECTROSCOPIC AND THEORETICAL STUDIES OF MOLE CULES WITH BONDING WHICH DEVIATES FROM NORMAL VALENCE ...
... Title : SPECTROSCOPIC AND STRUCTURAL STUDIES OF OXYANIONS OF TRANSITION METALS IN FUSED SALT MEDIA. ...
... Title : An Infrared Spectroscopic Study of the Vapor Adsorption of Nitroglycerin and Pentaerythritol Tetranitrate on Chrysotile Asbestos. ...
... Title : A Raman Spectroscopic and Electrochemical Study on Photoinduced Crystal Growth of DABCO (Triethylenediamine) Polyiodide Upon a ...
Ultraviolet-visible absorption spectroscopic studies of C[sub 60] vapor were carried out in the temperature range 400 [degree]C--720 [degree]C. The enthalpy of sublimation (180[plus minus]10 kJ/mol) was obtained through the use of the Clausius--Clapeyron equation.
The transient absorption decay times of tetraphenylbutadiene (TPB) and tetraphenylmethylbutadiene (TPMB) are measured as a function of solvent viscosity and of probe wavelength. The TPB spectra suggest that after excitation, TPB relaxes to the bottom of the excited state well where it relaxes radiatively to the ground state surface. TPMB transient ...
Steady air columns near 10,000 K and at pressures from 1 to 30 atm were studied spectroscopically from the side in emission and absorption experiments. Argon columns were used in auxiliary experiments. At 30 atm the effects of self-absorption within the a...
This report describes results obtained in a High-Resolution Spectroscopic Study conducted on the absorption of both CO2 and H2O at temperatures up to 800 K. An absorption cell which gave a satisfactory performance up to 1000 K is described. Approximately ...
Observing the HI Ly? line in absorption and emission with deep spectroscopic surveys we can study dwarf galaxies at high redshift. We describe how these observations tell us about typical (i.e., low mass, faint) star-forming galaxies, and how the various observational manifestations, damped Ly? systems, faint Ly? emitters, and ...
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 exposure time suggesting ...
