A shock tube and burner study on soot growth rate from
... and shock tube in which soot was produced by C2H4 pyrolysis at high pressure (5 bar) and in a large range of temperature (1850-2100 K). Both systems have been equipped with a novel technique of scattering at three angles coupled with laser extinction device in order to follow particles growth, to id ...
... and shock tube in which soot was produced by C2H4 pyrolysis at high pressure (5 bar) and in a large range of temperature (1850-2100 K). Both systems have been equipped with a novel technique of scattering at three angles coupled with laser extinction device in order to follow particles growth, to id ...
Organic Broadband Terahertz Sources and Sensors
... efficiently generate and detect the THz radiation. More encouragingly, amorphous EO polymers exhibit not only high EO coefficients but also the absence of phonon absorption (in the THz regime). A THz system based on a polymer emitter-sensor pair has produced spectral gap-free bandwidth up to ∼12 THz.1 ...
... efficiently generate and detect the THz radiation. More encouragingly, amorphous EO polymers exhibit not only high EO coefficients but also the absence of phonon absorption (in the THz regime). A THz system based on a polymer emitter-sensor pair has produced spectral gap-free bandwidth up to ∼12 THz.1 ...
Quantitative Chemical Analysis
... One of our most pressing problems is the need for sources of energy to replace oil. The chart at the right shows that world production of oil per capita has probably already peaked. Oil will play a decreasing role as an energy source and should be more valuable as a raw material than as a fuel. Ther ...
... One of our most pressing problems is the need for sources of energy to replace oil. The chart at the right shows that world production of oil per capita has probably already peaked. Oil will play a decreasing role as an energy source and should be more valuable as a raw material than as a fuel. Ther ...
Synthesis, Characterization and Properties of Copper Clusters
... full width at half maximum water homo highest occupied molecular orbital high-performance liquid chromatography high-resolution transmission electron microscopy kinetic energy laser desporption ionization-time of flight lowest unoccupied molecular orbital matrix assisted laser desorption/ionization ...
... full width at half maximum water homo highest occupied molecular orbital high-performance liquid chromatography high-resolution transmission electron microscopy kinetic energy laser desporption ionization-time of flight lowest unoccupied molecular orbital matrix assisted laser desorption/ionization ...
Raman spectroscopy of graphite - Institut für Festkörperphysik
... phonon wave vectors giving rise to the disorder-induced Raman bands are large compared with the extension of the Brillouin zone (Thomsen & Reich 2000). Thus, Raman scattering can be used to measure the phonon dispersion for wave vectors normally reserved to neutron or inelastic X-ray scattering, whi ...
... phonon wave vectors giving rise to the disorder-induced Raman bands are large compared with the extension of the Brillouin zone (Thomsen & Reich 2000). Thus, Raman scattering can be used to measure the phonon dispersion for wave vectors normally reserved to neutron or inelastic X-ray scattering, whi ...
Modern Analytical Chemistry
... Electrochemical Methods of Analysis 461 11A Classification of Electrochemical Methods 462 11A.1 Interfacial Electrochemical Methods 462 11A.2 Controlling and Measuring Current and ...
... Electrochemical Methods of Analysis 461 11A Classification of Electrochemical Methods 462 11A.1 Interfacial Electrochemical Methods 462 11A.2 Controlling and Measuring Current and ...
Porphyrins. XXXI. Chemical Properties and Electronic Spectra of dO Transition-Metal Complexes
... troscope) had changed from the four-lined metal-free to the twolined metallocomplex. After cooling to room temperature, the contents of the tube was poured into water (50 ml). The aqueous mixture wa!> extracted with methylene dichloride (10-ml aliquots) until all the porphyrin was in the organic lay ...
... troscope) had changed from the four-lined metal-free to the twolined metallocomplex. After cooling to room temperature, the contents of the tube was poured into water (50 ml). The aqueous mixture wa!> extracted with methylene dichloride (10-ml aliquots) until all the porphyrin was in the organic lay ...
Gas and Dust Chemistry in Planet-Forming Disks
... The circumstellar environment, modeled after a figure from van Zadelhoff (2002). The solid lines indicate dynamical processes. Infalling material from the molecular cloud likely affects the chemical properties of gas and dust in the outer disk. The transport of material and angular momentum refers t ...
... The circumstellar environment, modeled after a figure from van Zadelhoff (2002). The solid lines indicate dynamical processes. Infalling material from the molecular cloud likely affects the chemical properties of gas and dust in the outer disk. The transport of material and angular momentum refers t ...
Preparation of highly visible-light active N
... actual measurement. The electron paramagnetic resonance (EPR) spectra were recorded on an X-band Bruker EMX spectrometer operating at 100 KHz field modulation and 1 mW microwave power and equipped with a high-sensitivity cavity (ER 4119HS). The g values were determined using a DPPH standard. 2.4 Pho ...
... actual measurement. The electron paramagnetic resonance (EPR) spectra were recorded on an X-band Bruker EMX spectrometer operating at 100 KHz field modulation and 1 mW microwave power and equipped with a high-sensitivity cavity (ER 4119HS). The g values were determined using a DPPH standard. 2.4 Pho ...
Fibre-Loop Ring-Down Spectroscopy Using Liquid Core Waveguides
... highly sensitive absorption spectroscopic technique to measure light attenuation in gases, liquids, and solid samples. An optical cavity is used as a multi-pass cell, and the decay time of the light intensity in the cavity is measured, thereby rendering the techniques insensitive to light intensity ...
... highly sensitive absorption spectroscopic technique to measure light attenuation in gases, liquids, and solid samples. An optical cavity is used as a multi-pass cell, and the decay time of the light intensity in the cavity is measured, thereby rendering the techniques insensitive to light intensity ...
Determination of Equilibrium Constants for Reactions between Nitric
... that ammoniacal cobalt(II) complexes had advantages over the two compared absorbents when simulated flue gas was treated with about 5% oxygen. Moreover, the main byproducts were nitrite and nitrate, which are sources of fertilizers. Thus, the hexamminecobalt(II) solution can be considered as an ideal ...
... that ammoniacal cobalt(II) complexes had advantages over the two compared absorbents when simulated flue gas was treated with about 5% oxygen. Moreover, the main byproducts were nitrite and nitrate, which are sources of fertilizers. Thus, the hexamminecobalt(II) solution can be considered as an ideal ...
The effect of skin phototype on laser propagation through skin
... Figure 2.1: Relation between total exposure and exposure time for different modes of laser-tissue interaction (with permission from (Peng Q, 2008)). ..................................................................................... 6 Figure 2.2: Relation between fluence rate and exposure time for ...
... Figure 2.1: Relation between total exposure and exposure time for different modes of laser-tissue interaction (with permission from (Peng Q, 2008)). ..................................................................................... 6 Figure 2.2: Relation between fluence rate and exposure time for ...
Full text - Simon Fraser University
... boron nitride, have attracted much interest in the last few decades. When electrons are confined to move in two dimensions, several extraordinary applications arise due to this physical effect. For example, the quantum Hall effect happens in a two-dimensional systems usually at low temperatures. Recent ...
... boron nitride, have attracted much interest in the last few decades. When electrons are confined to move in two dimensions, several extraordinary applications arise due to this physical effect. For example, the quantum Hall effect happens in a two-dimensional systems usually at low temperatures. Recent ...
feature article
... macroscopic systems we usually consider the density of modes per unit volume as a fundamental dynamical quantity whereas in molecules we usually look at the total density of states. It is clear that, for many spectroscopicand dynamical observables, the former quantity is more relevant. When the mole ...
... macroscopic systems we usually consider the density of modes per unit volume as a fundamental dynamical quantity whereas in molecules we usually look at the total density of states. It is clear that, for many spectroscopicand dynamical observables, the former quantity is more relevant. When the mole ...
Optical Properties of Semiconductor Nanocrystals
... promotes a variety of photoinduced phenomena like persistent and permanent photophysical and photochemical phenomena that are known in atomic and molecular physics but do not occur in solids. Finally, nanocrystals are fabricated by means of techniques borrowed from glass technology, colloidal chemis ...
... promotes a variety of photoinduced phenomena like persistent and permanent photophysical and photochemical phenomena that are known in atomic and molecular physics but do not occur in solids. Finally, nanocrystals are fabricated by means of techniques borrowed from glass technology, colloidal chemis ...
Optical Spectroscopy of Spin Ladders
... elementary excitations. The triplet dispersion shows a gap [3], which is contrary to both 1D Heisenberg chains and odd-leg ladders that have gapless excitation spectra. The socalled telephone-number compounds (Sr,La,Ca)14 Cu24 O41 provide excellent realizations of two-leg spin ladders, which are com ...
... elementary excitations. The triplet dispersion shows a gap [3], which is contrary to both 1D Heisenberg chains and odd-leg ladders that have gapless excitation spectra. The socalled telephone-number compounds (Sr,La,Ca)14 Cu24 O41 provide excellent realizations of two-leg spin ladders, which are com ...
reflectance measurement and modelling of high reflectivity
... This thesis is about the reflectance measurement of high reflectivity DBR stacks by using Fourier Transform Infrared (FT-IR) spectroscopy. First, the basic theory of optical multilayer is reviewed and then the principle operation of FT-IR spectroscopy is studied. Followed by method used to simulate ...
... This thesis is about the reflectance measurement of high reflectivity DBR stacks by using Fourier Transform Infrared (FT-IR) spectroscopy. First, the basic theory of optical multilayer is reviewed and then the principle operation of FT-IR spectroscopy is studied. Followed by method used to simulate ...
Inelastic Collisions of Atomic Antimony, Aluminum, Erbium and
... Optical pumping beam profiles and diffraction simulations . . . . . . . . . . Al absorption at B = 0.5 T with laser power modulation . . . . . . . . . . . Birefringence and the Faraday effect in dewar windows . . . . . . . . . . . . Al–3 He and Mn–3 He momentum transfer cross section calibration . . . ...
... Optical pumping beam profiles and diffraction simulations . . . . . . . . . . Al absorption at B = 0.5 T with laser power modulation . . . . . . . . . . . Birefringence and the Faraday effect in dewar windows . . . . . . . . . . . . Al–3 He and Mn–3 He momentum transfer cross section calibration . . . ...
The effect of gamma radiation on fibre Bragg
... French physicist Paul Villard is credited with discovering gamma rays in 1900. Gamma rays are a form of electromagnetic radiation. He recognized they were different than x-rays in that they had a much larger penetrating depth also they were not affected by electrical or magnetic fields. The major di ...
... French physicist Paul Villard is credited with discovering gamma rays in 1900. Gamma rays are a form of electromagnetic radiation. He recognized they were different than x-rays in that they had a much larger penetrating depth also they were not affected by electrical or magnetic fields. The major di ...
24_(582-588)(완료)E14120 ed-Jin-Kyu Yang.hwp
... Hence, the efficient QW-SP coupling increases the spontaneous emission (SE) rate, while the nonradiative process is reduced simultaneously. In addition, the metallic nanoparticle (NP) has very large scattering cross section to extract the light outside materials to overcome TIR. For satisfying the i ...
... Hence, the efficient QW-SP coupling increases the spontaneous emission (SE) rate, while the nonradiative process is reduced simultaneously. In addition, the metallic nanoparticle (NP) has very large scattering cross section to extract the light outside materials to overcome TIR. For satisfying the i ...
SPECTROSCOPIC STUDIES OF SYNTHETIC AND
... Ultrafluars 10serve as objective and condenser. Two changeable highly stabilized quartzhalogen and Xenon lamps, both of 70 W, are used as light source. Two changeable photoelectric multiplying tubes and cooled PbS-cell are used as photodetectors. A mechanical high-stabilized 300 Hz-chopper and lo ...
... Ultrafluars 10serve as objective and condenser. Two changeable highly stabilized quartzhalogen and Xenon lamps, both of 70 W, are used as light source. Two changeable photoelectric multiplying tubes and cooled PbS-cell are used as photodetectors. A mechanical high-stabilized 300 Hz-chopper and lo ...
Pulsed photoacoustic techniques and glucose determination in
... The fundamental theory of photoacoustics in liquid and soft tissue was studied systematically. The distributions of photoacoustic sources in a near-infrared optical skin model were simulated by the Monte Carlo method. Expansion coefficient and specific heat of glucose solution were measured by therm ...
... The fundamental theory of photoacoustics in liquid and soft tissue was studied systematically. The distributions of photoacoustic sources in a near-infrared optical skin model were simulated by the Monte Carlo method. Expansion coefficient and specific heat of glucose solution were measured by therm ...
A study on optical absorption and constants of doped poly(ethylene
... their properties is extremely important not only for scientific knowledge but also for modern and advanced technological applications. Most polymeric materials are poor conductors of electricity because of the unavailability of large number of free electrons or ions to participate in the conduction p ...
... their properties is extremely important not only for scientific knowledge but also for modern and advanced technological applications. Most polymeric materials are poor conductors of electricity because of the unavailability of large number of free electrons or ions to participate in the conduction p ...
Multidimensional Vibrational Spectroscopy of Hydrogen Bonds in
... donor forms a covalent bond with the hydrogen atom whereas the interaction between the hydrogen atom and the acceptor is often considerably weaker∗ [1]. Despite its simplicity, the relevance of hydrogen bonds in nature can hardly be overestimated. It is a unique interaction that is strong enough to ...
... donor forms a covalent bond with the hydrogen atom whereas the interaction between the hydrogen atom and the acceptor is often considerably weaker∗ [1]. Despite its simplicity, the relevance of hydrogen bonds in nature can hardly be overestimated. It is a unique interaction that is strong enough to ...
Atomic absorption spectroscopy
Atomic absorption spectroscopy (AAS) is a spectroanalytical procedure for the quantitative determination of chemical elements using the absorption of optical radiation (light) by free atoms in the gaseous state.In analytical chemistry the technique is used for determining the concentration of a particular element (the analyte) in a sample to be analyzed. AAS can be used to determine over 70 different elements in solution or directly in solid samples used in pharmacology, biophysics and toxicology research.Atomic absorption spectroscopy was first used as an analytical technique, and the underlying principles were established in the second half of the 19th century by Robert Wilhelm Bunsen and Gustav Robert Kirchhoff, both professors at the University of Heidelberg, Germany.The modern form of AAS was largely developed during the 1950s by a team of Australian chemists. They were led by Sir Alan Walsh at the Commonwealth Scientific and Industrial Research Organisation (CSIRO), Division of Chemical Physics, in Melbourne, Australia.Atomic absorption spectrometry has many uses in different areas of chemistry such as: Clinical analysis: Analyzing metals in biological fluids and tissues such as whole blood, plasma, urine, saliva, brain tissue, liver, muscle tissue, semen Pharmaceuticals: In some pharmaceutical manufacturing processes, minute quantities of a catalyst that remain in the final drug product Water analysis: Analyzing water for its metal content.↑ ↑ ↑