Abstract:
An electronic device is presented comprising at least one electrically conductive element coupled to an elongated carbon or inorganic semiconductor based nanostructure, by a biological binder.
Abstract:
A method and system are presented for producing an output coherent anti-stokes Raman scattering (CARS) signal of a medium. The method comprises generation of a unitary optical excitation pulse that carries a pump photon, a Stokes photon and a probe photon; and inducing a CARS process in the medium by exciting the medium by the at least one such unitary optical excitation pulse.
Abstract:
A device and method for manipulating a direction of motion of current carriers are presented. The device comprises a structure containing a two-dimensional gas of current carriers configured to define at least one region of inhomogeneity which is characterized by a substantially varying value of at least one parameter from the following: a spin-orbit coupling constant, density of the spin carriers, and a mobility of the gas. The device may be configured and operable to perform spin manipulation of a flux of the spin carrying current carriers to provide at least one of the following types of deviation of said spin-carrying current carriers: spin dependent refraction, spin dependent reflection and spin dependent diffraction on desired deviation angles of a direction of motion of the spin-carrying current carriers being incident on said at least one region of inhomogeneity. The device may also be configured and operable to allow emission of the current carriers from a diffusive region at one side of the region of inhomogeneity to a ballistic region at the opposite side of the region of inhomogeneity to provide the current carriers propagation in multiple directions in the ballistic region with a wide angular range of these directions.
Abstract:
A method and device are provided for automatically generating a key and a conjugate key to be used in an optical code division multiple access system. The method comprises applying a down conversion process to pump input light to thereby produce down converted broadband signal and idler fields that are complex conjugates of each other. The signal and idler fields thus serve as the key and its conjugate. Also provided according to the invention is a method for use in coding/decoding a signal in an optical code division multiple access system.
Abstract:
The present invention concerns genetically stable transformed Lemnaceae plants and methods for their transformation by Agrobacterium cells. The present invention further concerns a method for regeneration of plants from calli, utilizing low sucrose media and products of interest produce from said plants. The present invention further concerns booster media for use in the above methods.
Abstract:
A method and device are presented for measuring the electrical properties of a specimen. The specimen is excited with high energy radiation to cause emission of internal charged particles from the specimen. Electrical power is supplied to a circuit, that is formed by the specimen and any added component connected to a back contact of the specimen. The electric power supply includes at least one of the following: irradiating the circuit with low energy charged particles; subjecting the circuit to an external field of the kind affecting the flux of emitted internal charged particles, and supplying a bias voltage to the back contact of the specimen. During the power supply to the specimen, at least one of the following is carried out: an electric current through the specimen is measured, and the emitted charged particles are analyzed versus their energy (using a contactless voltmeter) which provides local potential values at chemical entities of the specimen. This technique enables determination of rich, chemically resolved, electrical properties of a specimen, such as I–V characteristic, and/or evaluation of a work function characteristic, and/or characterization of electric leakage or breakdown conditions of the sample, and/or characterization of accumulation of charge within at least one region of the sample, and/or chemically resolved photovoltaic characteristics (photovoltage and/or photocurrent) of the sample.
Abstract:
An auto-focusing method and device are presented for determining an in-focus position of a sample supported on a substrate plate made of a material transparent with respect to incident electromagnetic radiation. The method utilizes an optical system capable of directing incident electromagnetic radiation towards the sample and collecting reflections of the incident electromagnetic radiation that are to be detected. A focal plane of an objective lens arrangement is located at a predetermined distance from a surface of the substrate, which is opposite to the sample-supporting surface of the substrate. A continuous displacement of the focal plane relative to the substrate along the optical axis of the objective lens arrangement is provided, while concurrently directing the incident radiation towards the sample through the objective lens arrangement to thereby focus the incident radiation to a location at the focal plane of the objective lens arrangement. Reflected components of the electromagnetic radiation to a location objective lens arrangement are continuously detected. The detected reflected components are characterized by a first intensity peak corresponding to an in-focus position of said opposite surface of the substrate, and a second intensity peak spaced in time from the first intensity peak and corresponding to an in-focus position of said sample-supporting surface of the substrate. This technique enables imaging of the sample when in the in-focus position of the sample-supporting surface of the substrate.
Abstract:
The present invention provides a process for preparing a metal carbene complex of formula (I): wherein M is a transition metal atom selected from the group consisting of ruthenium, rhodium, iron, cobalt, osmium and iridium; L denotes neutral donor ligands ligated to said metal, such groups being the same or different; X is an anionic ligand; R1 and R2 are each independently selected from the group consisting of hydrogen, substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C2-C20 alkenyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted vinyl, a is 2 or 3 and b is 1 or 2, such process comprising reacting a sulfur ylide of the formula Ar2S═CR1R2 or its precursor with an appropriate metal complex comprising a transition metal atom selected from the group consisting of ruthenium, rhodium, iron, cobalt, osmium and iridium, said metal complex being also in dimeric form, at a temperature between +80° C. and −80° C., in an inert solvent and under inert atmosphere.
Abstract translation:本发明提供了制备式(I)的金属卡宾络合物的方法:其中M是选自钌,铑,铁,钴,锇和铱的过渡金属原子; L表示与所述金属连接的中性供体配体,这些基团相同或不同; X是阴离子配体; R 1和R 2各自独立地选自氢,取代或未取代的C 1 -C 20烷基,取代或未取代的C 2 -C 20烯基,取代或未取代的环烷基,取代或未取代的杂环烷基,取代或未取代的芳基,取代或未取代的杂芳基, 取代或未取代的乙烯基,a为2或3,b为1或2,该方法包括使式Ar 2 S = CR 1 R 2或其前体的硫叶立德与包含过渡金属原子的合适的金属络合物 选自钌,铑,铁,钴,锇和铱,所述金属络合物也是二聚体形式,在+ 80℃和-80℃之间的温度下,在惰性溶剂中,在惰性溶剂 大气层。
Abstract:
A transparent windows (4) for a solar radiation receiver assembly and a solar receiver assembly using the same, which assembly comprising a housing (2) having an aperture (3) and holding a volumetric solar absorber (5), the transparent window (4) mounted in the aperture (3) for the admission of incident concentrated solar radiation, shielding the volumetric solar absorber so as to form a sealed absorber chamber capable of holding a fluid medium, and means for the ingress and egress of the fluid medium. The transparent window (4) consists of a plurality of discrete transparent window segments (11,12) set in a common matrix (10) and is capable of withstanding high temperature.
Abstract:
The use of interleukin-6 and/or salts, functional derivatives, muteins or active fractions thereof, in the treatment of chronic lymphocytic leukemia and B-cell lymphomas, as well as such use together with the soluble interleukin-6 receptor, to pharmaceutical compositions and to a method of treating chronic lymphocytic leukemia or B-cell lymphomas.