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Caustic stable chromatography ligands

ActiveUS20100221844A1Cost-effectiveComponent separationBiological material analysisImmunoglobulin bindingImmunoglobulin class
The present invention relates to chromatography ligands having improved caustic stability, e.g., ligands based on immunoglobulin-binding proteins such as, Staphylococcal protein A, as well as methods of making and using such ligands.
Owner:EMD MILLIPORE CORP

Device for preparing large-area periodic micro-nano structures through dual femtosecond laser beam cylindrical lens convergence interference

InactiveCN109865939ACost-effectiveEasy to operateLaser beam welding apparatusAnti jammingBeam splitter
The invention discloses a device for preparing large-area periodic micro-nano structures through dual femtosecond laser beam cylindrical lens convergence interference. The device is characterized in that a sample is fixed to a precisely moving five-axis horizontal moving table, the polarization direction is changed by a half wave plate, a Gauss beam output by a femtosecond laser light source is divided into two lasers with the strength ratio of 1:1 by a beam splitter, and the lasers are converged by two beam cylindrical lenses to form interference. The laser power, the polarization direction,the same time of the two lasers, shutter release, the sample moving direction, the sample moving speed and the like are completed by a computer control system. Dual-beam interference is achieved through a cylindrical lens convergence scheme, and the regular and large-area periodic stripe nanostructures can be prepared. The device has the advantages of convenient and fast operation, economical efficiency, high efficiency, high anti-jamming capability and the like and can be used for preparing the metal and semiconductor micro-nano grating structures in a large-area mode, the optical propertiessuch as absorption, luminescence, coloring and the like of the material surfaces are regulated and controlled, and the wettability of the material surfaces is regulated and controlled, for example, hydrophobicity, water shrinkage, lipophobicity and oil shrinkage of the material surfaces are regulated and controlled.
Owner:EAST CHINA NORMAL UNIVERSITY

Building shock absorbing device

The invention discloses a building shock absorbing device including a building wall body. The lower portion of the building wall body is fixedly connected with a shock absorbing groove body, shock absorbing annular columns are arranged in the inner portion of the shock absorbing groove body, and fixing grooves are arranged on the bottom portion of the shock absorbing groove body. The side of the building wall body is fixedly connected with shock absorbing columns, clamped grooves are formed in the shock absorbing columns, and the clamped grooves and the side of the building wall body constitute a parallel connection structure. The upper portion of the building wall body is fixedly connected with the fixing groove body, and elastic cotton plates are arranged in the inner portion of the fixing groove body and clamped groove. The bottom wall body of the building is fixed, and the side of the building wall body becomes a supporting shock absorbing structure through the combination of the shock absorbing annular columns, shock absorbing springs and concrete thereby absorbing the shock. The aseismic ability of building board room is poor, it is easy to cause large-scale economic losses and personnel injury in the face of force majeure, and the building board room is urgently needed to improve the overall aseismic performance. Those problems, caused by the simple structure of the building board room, are solved.
Owner:开封宜家建筑材料有限公司
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