In the present dissertation the construction and application of a mobile laser system for the remote detection of sulfur dioxide and ozone in the lower troposphere are described. The lidar uses the differential absorption and scattering technique. It cont...
National Technical Information Service (NTIS)
Investigations on the thermodynamics and kinetics of the absorption of volatile compounds in high boiling scrubbing agents have been carried out in a previous PEF-project. Within this project it was shown that besides glycol ethers other compounds may be ...
In the context of the research project the scrubbing of air contaminated by peculiar volatile organic compounds was investigated using the absorption technique by means of high boiling organics as washing liquids. Eight chlorinated hydrocarbons well known...
Direct absorption spectroscopy is used for the measurement of atmospheric OH; autocalibration is achieved by laser induced fluorescence. Measurements by optical absorption present problems concerning the selfproduction of OH, test sensitivity and interact...
Absorption-and scattering-losses of dielectric evaporated layer systems are determined by thermal resistance measurements. The specific effects of several parameters on absorption coefficients of various materials are determined for single layers, and the...
An apparatus for calorimetric absorption spectroscopy (CAS) and calorimetric transmission spectroscopy (CTS) at temperatures up to 1.3K, including computer control, data acquisition, and data evaluation, was built. At 1.3K, products of absorption coeffici...
The production of titanium nitrides and carbides by laser fusion with methane or nitrogen as a reaction gas is considered. The process parameters, such as optical elements, energy, radiation absorption, and their influence in ceramics layer quality, were ...
The sounding of IR absorption lines with high optical thickness of IR-active trace gases in the stratosphere was investigated. The significance of the sensitivity of the radiance, integrated over a line, on changes in the absorber mass, is discussed. The ...
By means of the oscillation analysis, hydrogen absorption of a steel material is studied to avoid material damages. For the experiments the steels 50 CrV4 and 34 CrMo4 are used. The hydrogen loading produces selenium acid by cathodic polarization in an el...
The detectability of defective adhesions in carbon fiber composites (CFC) by X-ray procedure is shown to be improved by increasing the absorption capacity of the adhesive, adding the contrast substances barium sulfate or aluminum. The adhesives BSL 313 A ...
Ultrasonic and viscosity measurements were carried out in a high density polyethylene melt. The ultrasonic measurements are related to the average temperature in the melt volume penetrated by sound pulses. Sound velocity and absorption measurements were p...
The absorption spectrum of the photodissociation process of water, and the vibration distributions, summed over all final rotations of the fragment, were calculated. It is shown that, using mass-scaled polar coordinates, continum functions, which describe...
The transmission properties of CdS in the band discontinuity is evaluated with the sharp absorption structures of excitonic excitation states and by a broadband defect-correlated absorption. A broadband induced transmission could be observed with increasi...
The Gurevich-Pomeranchuk theory of resonance absorption is considered. This half-empirical theory gives a view of the process of resonance absorption in heterogeneous reactors and shows good agreement with experimental values. The general formulas are given. The cases of thin and thick rods were considered. (M.C.G.)
Energy Citations Database
Acquired von Willebrand disease (AVWD) is a rare, underdiagnosed hemorrhagic disorder, which is similar to congenital VWD with regard to the clinical and laboratory parameters; however, it is found in individuals with no positive family history and has no genetic basis. The etiology is varied, the commonest being hematoproliferative disorders and cardiovascular disorders. ...
PubMed
Indium foils are often used for measurements of neutron fields by detection of the decay electron from In/sup 116/. The absorption of this electron by the indium metal therefore affects the activity measured. In/sup 116/ also emits gamma radiation with energies between 0.1 and 2.32 Mev. The absorption constants for these radiations were ...
Durch Absorption von zwei Laserstrahlen mit unterschiedlichen Wellenl�ngen k�nnen in Halbleitern makroskopische Str�me erzeugt werden. Die Ausbreitungsrichtung der Elektronen und insbesondere die Ausrichtung ihrer Spins lassen sich �ber die relative Phase der beiden Laserfelder koh�rent kontrollieren, wie k�rzlich zwei Gruppen an den ...
NASA Astrophysics Data System (ADS)
Graphite tube atomic absorption spectrometry (GFAAS) with electrothermal atomization enables trace element analyses down to the (mu)g/kg range; however, the specific analytic signal is found to be disturbed by the matrix composition. The report determines...
The dissociation of single rotational states of the asymmetric yield oscillation of water after optical excitation in the first absorption bands was investigated. The H2O state was prepared with a tuneable UV-laser. The specific states of the OH fragments...
Trotz der zunehmenden Verbreitung j�ngerer bildgebender Verfahren bleibt medizinischer Ultraschall (US) weiterhin ein wichtiges Hilfsmittel bei chirurgischen Eingriffen und der klinischen Diagnose. Viele US-gest�tzte medizinische Prozeduren erfordern allerdings ausgiebiges Training, so dass es w�nschenswert ist, eine realistische Simulation von US-Bildern zur Verf�gung ...
An examination of the feasibility and reproducibility of metallurgical transformations obtained by heat treatment of different metals by means of a continuous CO2 laser requires the perfection of a theoretical model of heat diffusion, which can describe t...
A series of experiments was conducted to examine the possibility of uptake of hexachlorobenzene (HCB) by plants of oil-pumpkin (Cucurbita pepo). The results show the different ways of HCB-uptake by the oil-pumpkin plant. It was demonstrated that the pollu...
and through "x-ray energy loss spectroscopy" provides spectra like x-ray absorption for low-Z atoms in bulk is the critical tool in the study of material properties. On the level of atoms, electrons, and spins, x-rays have diffraction revealing the atomic structure of matter, pioneered by von Laue and the Braggs; 3) x-ray
E-print Network
A new process for the recovery of organic solvents from waste air has been developed. The process consists of three steps: Absorption of the solvents in a packed column, membrane pervaporation of the washing solution (the regenerated washing agent is recy...
In laboratory tests a method was found to control continuous and non contacting the degree of admission of filler rods. Behind the filling station the absorption of the ionizing radiation of a 90Sr-beta source is measured. After successful tests with the ...
The possibility of replacing conventional visual equipment (TV systems) with infrared visual detectors was explored. The influence of absorption and scattering on IR radiation is discussed. The applicability of IR detectors in IR visual systems was studie...
Using high resolution infrared diode laser absorption spectroscopy, the oscillation relaxation and the thermal decomposition of nitrogen monoxide were time-resolved examined in homogeneous nitrogen monoxide argon mixtures, behind vertical shock waves. The...
Structural composition and geometry of avalanche detectors are evaluated for signal to noise ratios caused by the different ionization coefficients of distributed electrons and holes. Considered are the following structures for possible gamma detection (1...
The velocity constants of the reaction between deuterium atoms and vibration-excited hydrogen molecules were investigated. The measurements were performed in a thermostatically controllable flow reactor, coupled with an atomic line resonance absorption de...
Optical properties of suspended matter and dissolved substances in sea water are studied by remote sensing for the determination of organic and inorganic substances concentration. Model computation is achieved by recording optical absorption of chlorophyl...
The optical properties of irregularly shaped particles of size ranges from 10 to 300 micrometers are determined in order to calculate the absorptance of a solar heated fludized bed. An experimental numerical procedure is developed in order to predict the ...
Semi-empirical valence electron model calculations are used to interpret photoelectron spectra for the two to three smallest ionization energies in atomic complexes of the first two rows of the periodic system with an error of less than 1 eV. It is possib...
In the first part of this paper the optical absorption of amorphous films of PbCl2, formed by quenching condensation, is shown and compared to the spectrum of PbCl2 in its normal state. The sharp exciton band of crystalline PbCl2 in the long wavelength region is considerably broadened in the spectrum of amorphous films. The transition from the amorphous state to the normal ...
Map of regimes of pressure oscillations induced by absorption during rapid injection of a soluble gas jet through a submerged nozzle into liquid, namely, oscillations during absorption, bubbling, internal chugging and small chugging, is suggested. Boundaries between various pressure oscillations regimes occurring when rapidly soluble gas is absorbed in ...
In Fortf�hrung von Untersuchungen des Jubilars und seiner Mitarbeiter in den 60er Jahren zu den Eigenschaften der koh�renten Zust�nde wird die Ver�nderung eines koh�renten Feldes unter der Wirkung von Zwei-Photonen-Absorption betrachtet.Dazu wird die vereinfachte Beschreibung dieses Absorptionsvorganges benutzt. Diese ...
