The optical properties of dehydronorcamphor were reinvestigated. The previously reported absolute rotation and ORD amplitude of the n to pi* transition have been confirmed by an independent determination of the optical purity by nmr spectroscopy. The circ...

... slowly varying amplitude approximations and took into account linear and ... 3, the solid line shows the fit with ... The values of absolute value of X< 3 ...

The nonlinear stage of the absolute parametric instability in an inhomogeneous bounded plasma is examined theoretically.(AIP)

Lidar measurements can provide a great deal of information about the structure, location, and scattering properties of cirrus clouds. However, caution must be used when interpreting raw lidar backscatter profiles in terms of relative or absolute extinctio...

... Absolute Measurement of Sound Pressure in Liquids. ... of Plane, Finite Amplitude Waves in a ... Optical Method for Ultrasonic Velocity Measurements at ...

The absolute brightness indicatrices for the clear atmosphere in the visible region of the spectrum are computed using the spherical harmonics technique. The effects of aerosol fractions of the Aitken cores and submicron and hard-dispersed particles on the sky brightness are studied. Some limitations of the technique used for checking the stablity of the earth atmosphere's ...

We used a novel on-chip Rayleigh imaging technique to measure the absolute intensity of Rayleigh scattering of single-walled carbon nanotubes. The spatial distribution of the radiation scattered by the nanotubes is determined by their shape, but the intensity and spectrum of the scattered radiation are determined by exciton dynamics, quantum-dot-like ...

... Title : OPTICAL PROPERTIES AND OPTICALLY INDUCED ELECTRON EMISSION PROPERTIES OF A SIMPLE METAL. ...

The work on optical and photoionization measurements on ethylene glycol, diethylene glycol, triethylene glycol and tetraethylene glycol was recently completed. Studies were completed on absolute photoyield of this series of four n-ethylene glycols. System...

Emission from the exhaust plume of a 30 cm mercury ion thruster was measured from 160 to 600 nm as a function of axial and radial distance from the thruster discharge chamber. The spectrally dispersed absolute intensities were used to construct an empiric...

Although metallic nanostructures are useful for nanoscale optics, all of their key optical properties are determined by their geometry. This makes it difficult to adjust these properties independently, and can restrict applications. Here we use the absolute intensity of Rayleigh scattering to ...

The theory and some applications of Raman Optical Activity (ROA) towards terpene analysis are presented. With this technique, vibrational optical activity from chiral molecules can be measured providing their absolute configuration. This short review provides data obtained for pinene, verbenone, menthol, camphor, carenes and related ...

Hyosgerin, a new optically active coumarinolignan, has been isolated and characterized along with three other coumarinolignans, venkatasin, cleomiscosin A and cleomiscosin B, from the seeds of Hyoscyamus niger L. The structure was determined on the basis of spectroscopic analysis and chemical conversion. The optical properties and ...

In the 1960s and 1970s optical region spectrophotometry achieved the status of a major tool in stellar research. New instrumentation, rotating grating scanners using photomultiplier tubes as detectors, and improved absolute calibrations of Vega made this possible. After this period the use of this technique declined to its near demise at present. The use ...

In the 1960's and 1970's optical region spectrophotometry achieved the status of a major tool in stellar research. New instrumentation, rotating grating scanners using photomultiplier tubes as detectors, and improved absolute calibrations of Vega made this possible. After this period the use of this technique declined to its near demise at present. The ...

... ADA300437. Title : Particulate Optical Closure: Reconciling Optical Properties of Individual Particles with Bulk Optical Properties. ...

We present precise and absolute measurements of full complex third-order optical susceptibility on different fused-silica and original glasses composed of tellurium, titanium, and niobium erbium. These materials are designed to be the key point for applications ranging from high-power laser systems to optoelectronics; their nonlinear index of refraction is ...

We propose a variable-path interferometric technique for the measurement of the absolute refractive index of optical glasses. We use two interferometers to decide the ratio between changes in the optical path in a prism-shaped sample glass and in air resulting from displacement of the sample. The method allows precise measurements to ...

Published data on the synthesis, absolute configurations and biological properties of chiral hydroxy phosphonates are generalised and described systematically. Examples of asymmetric synthesis of hydroxy phosphonates by the phospho-aldol reaction, reduction of keto phosphonates, chemo-enzymatic approach, and so on are discussed. Methods for determination ...

... Accession Number : ADA396860. Title : Optical Properties of Satellite Materials - The Theory of Optical and Infrared Properties of Metals. ...

Sotolon (1) and maple furanone (2) are naturally occurring chiral furanones. These 5-substituted-2(5H)-furanones are industrially significant aroma compounds due to their characteristic organoleptic properties and extraordinarily low odor thresholds. Each enantiomer of 1 and 2 was successfully obtained by preparative enantioselective supercritical fluid chromatography. The ...

The absolute Seebeck coefficient is to transport property of individual materials. Absolute properties for pairs of dissimilar materials combine in simple thermocouples to produce an effective relative Seebeck coefficient. The less familiar absolute prope...

The motional Stark effect (MSE) diagnostic will be essential for the study of advanced scenarios on ITER and its design is currently underway with initial emphasis on the optical design. Optical performance, as measured by photon throughput and minimization of polarization aberrations, will be critical to the success of the diagnostic. Consequently, the ...

Formalin fixation is a preparation method widely used in handling tissue specimens, such as biopsies, specifically in optical studies such as microscopy. In this note, we examine how formalin fixation affects the polarization properties of porcine myocardium and liver as assessed by optical polarimetry. Spatial maps of linear ...

Formalin fixation is a preparation method widely used in handling tissue specimens, such as biopsies, specifically in optical studies such as microscopy. In this note, we examine how formalin fixation affects the polarization properties of porcine myocardium and liver as assessed by optical polarimetry. Spatial maps of linear ...

We use optimized concepts to measure directly low absorption in optical materials and thin films at various laser wavelengths by the laser induced deflection (LID) technique. An independent absolute calibration, using electrical heaters, is applied to obtain absolute absorption data without the actual knowledge of the photo-thermal ...

We present high-accuracy measurements for wavelengths near 157 nm of the absolute index of refraction, the index dispersion, and the temperature dependence of the index for the ultraviolet optical materials with cubic symmetry: CaF2, SrF2, BaF2, and LiF. Accurate values of these quantities for these materials are needed for designs of the lens systems for ...

By inserting a polarization controller, a polarization-insensitive optical fiber probe is first proposed. In order to design a fiber probe acting as a free-space media, the five effective parameters of an optical fiber are extracted by an analytical technique based on the Mueller matrix and the Stokes parameters. The feasibility of the common-path ...

... RESEARCH ON THE OPTICAL PROPERTIES OF MATTER. ... Descriptors : *EXCITATION, *ATOMIC ENERGY LEVELS, OPTICAL PHENOMENA ...

Field measurements of aerosol content and optical properties of polar atmospheres are difficult and therefore very scarce, especially over ice-covered marine areas of the Arctic and Antarctic regions. The purpose of this paper is to investigate the opportunity to retrieve these properties from the blurring effect of the atmosphere on ...

Until recently, it has not been possible to determine with any real certainty a complete picture of chirality (absolute configuration, optical rotation direction, and helical twisting power) for new chiral compounds without first synthesizing, purifying, characterizing, and testing each and every new material. Recent advances in computational chemistry now ...

Methodology to calculate electronic chiroptical properties from time-dependent density functional theory (TDDFT) is outlined. Applications of TDDFT to computations of electronic circular dichroism, optical rotation, and optical rotatory dispersion are reviewed. Emphasis is put on publications from 2005 to 2010, but much of the older ...

Methodology to calculate electronic chiroptical properties from time-dependent density functional theory (TDDFT) is outlined. Applications of TDDFT to computations of electronic circular dichroism, optical rotation, and optical rotatory dispersion are reviewed. Emphasis is put on publications from 2005 to 2010, but much of the older ...

... Descriptors : (*SCREENS(DISPLAYS), OPTICAL PROPERTIES), PHYSICAL PROPERTIES, RESOLUTION, LIGHT TRANSMISSION, REFLECTION ...

... Descriptors : (*DIAMONDS, ELECTRICAL PROPERTIES), (*OPTICAL PROPERTIES, DIAMONDS), (*SEMICONDUCTORS, DIAMONDS ...

Metal nanocluster composite glass prepared by 180 keV Cu ions into silica with dose of 1 � 1017 ions/cm2 has been studied. The microstructural properties of the nanoclusters were analysed by optical absorption spectra and transmission electron microscopy (TEM). Third-order nonlinear optical properties of the ...

Time resolved detection of laser-induced pressure profiles permits sensitive and high-resolution measurements of distribution of absorbed optical energy in optically scattering and opaque media, such as blood. We report experimental measurements of optical properties in the whole blood of animals at various levels ...

Theoretical calculation of chiroptical properties has been a powerful tool for the absolute configuration assignment of chiral compounds including synthetic drugs and natural products. In the present work, time-dependent density functional theory (TDDFT) calculations of electronic circular dichroism (ECD) and optical rotatory ...

The effect of severe plastic deformation by torsion (SPDT) in Bridgman anvils at a high pressure (6 GPa) on the physical properties and crystal structure of the shape memory alloy Ti49.5Ni50.5 has been studied. The behavior of the thermal expansion, electrical resistivity, absolute differential thermopower, Hall coefficient, magnetic ...

... Title : Optical and Electro-Optical Properties of a Photocross-Linkable Polymer. ... Electro-optic properties of this polymeric system are reported. ...

... 35 ( Theory and Numerical Simulation of Optical Properties of Fractal Clusters ... Theory of linear optical properties of fractal clusters is developed. ...

... Title : The Optical Properties of Sea Ice. ... Abstract : Sea ice is a translucent material with an intricate structure and complex optical properties. ...

accurately simulate the evolution of the optical properties of smoke aerosols ... This study investigates the transport and optical properties of southern ...

... Infrared Optical Property Measurement ... Descriptors : *OPTICAL PROPERTIES, *REFRACTIVE ... ALUMINUM OXIDES, ZINC OXIDES, COMPLEX ...

The physical and optical properties of biomass burning aerosols in a savanna region .... characterization of biomass buming aerosol optical properties ...

in the annual dry seasons, characterization of the optical properties of the resultant .... characterization of biomass burning aerosol optical properties ...

Spectral dependence of optical properties linked to sources .... must be recognized in optical properties reflected in models and satellite retrievals. ...

Much of our knowledge of the properties of matter at high pressures, from the static ruby pressure scale to shock compression at Gbar pressures, rests ultimately on the use of shock waves. Simple conservation relations define the initial and final states, leading to absolute measurements. I will describe some methods for measuring the equation of state of ...

A piezooptical effect in monoclinic triglycime sulfate crystals is described, and expressions are obtained which relate piezooptical coefficients piezo-induced to changes in the refraction index of the crystals with allowance for their elasticity. The absolute values of the piezooptical coefficients of triglycine sulfate crystals are determined; electron spectra reflection are ...

We theoretically and experimentally evidence that fiber systems are convective systems since their nonlocal inherent properties, such as the dispersion and Raman effects, break the reflection symmetry. Theoretical analysis and numerical simulations carried out for a fiber ring cavity demonstrate that the third-order dispersion term leads to the appearance of convective and ...

Absolute-reflectance measurements of single-crystal ReO3 in the spectral range 0.2-22 eV are analyzed by Kramers-Kronig relations to give the real and imaginary parts of the dielectric constants. The dielectric constant is characteristic of free-electron ...