142results about How to "Small hindrance" patented technology

In a method of assembling a surface illumination system having an electromagnetic radiation emitting front side, at least one primary radiation source suitable for emitting electromagnetic radiation when operating is disposed on at least one mounting area of a flexible carrier. The flexible carrier has a front side and a back side opposite said front side, the front side of the flexible carrier defines a reference plane. The mounting area of the flexible carrier on which the primary radiation source is disposed is then bent out of the reference plane such that an optical axis of the primary radiation source extends parallel or obliquely to the reference plane. In a further step, at least one light-conducting guide having a radiation emitting front side and at least one incoupling region is disposed on the flexible printed circuit board so that in operation, the primary radiation source emits radiation into the incoupling region of the light guide and the radiation emitting front side of the light guide points in the direction of the radiation emitting front side of the surface illumination system. A corresponding surface illumination system is also described.

The invention provides a probe based on a G-quadruplex-chlorine heme DNA enzyme and a method for detecting protein. The method for detecting the protein facilitates detecting operation and is low in cost and free of marking. The probe has the advantages of being high in sensitivity and low in background noise. When the protein is detected, the detecting operation is easy, consumed time is short, cost is low, and the problems that a method for detecting the protein in the prior art is long in consumed time, high in cost and complex in detecting probe manufacturing are solved.

The invention discloses a block conjugated polymer, a preparation method thereof and use thereof. The structural general formula of the block conjugated polymer is represented by a formula I. In the invention, diazosulfide serving as a receptor is subjected to side-group modification, the obtained block conjugated polymer is improved in dissolubility and crystallinity and reduced in steric hindrance of the alkyl chains, and thus high organic solar cell efficiency is achieved. Therefore, the block conjugated polymer provided by the invention has a promising application prospect in solar cells.

The invention discloses a method for separating and enriching micro circulating tumor cells (circulating tumor cells, CTCs) in whole blood for further providing a basis for subsequent study of tumor cells, and relates to the biomedical field. The method comprises the following steps of: covalent coupling of dendrimers and matters (special matters) specifically combined with target cells; further coating long-chain biotin molecules by dendrimers modified by the specific matters; capturing CTCs in a whole blood sample by dendrimers co-modified by the special matters and the long-chain biotin; identifying and coupling long-chain biotin dendrimers in the whole blood by streptavidin modified nanomagnetic beads; and separating and resuspending the captured CTCs. The resuspension can be directly used for subsequent analysis. Compared with conventional cell separation methods, the method is more suitable for magnetic separation of CTCs in complex whole blood samples, so that the magnetic separation time is shortened, and the CTCs separation efficiency in the whole blood sample is improved.

The invention discloses an ultrafast-response overcharge-prevention electrochromic device and a preparation method thereof. The ultrafast-response overcharge-prevention electrochromic device comprisesa first transparent electrode, an ionic conduction layer, an organic electrochromic layer, an inorganic electrochromic layer and a second transparent electrode which are arranged in a sequentially laminated way. The ultrafast-response overcharge-prevention electrochromic device has the following beneficial effects that (1) the ionic conduction layer has the great pore diameter and is provided with many pore passages and facilitates positive ion transmission, so that the response speed of the device is accelerated; (2) the cooperative action of a plurality of positive ions is realized in the electrochromic process of the electrochromic device, so that the device has very high regulation capability; (3) in the ultrafast-response overcharge-prevention electrochromic device, a resin layer perse has good insulation capability, so that the electricity leakage can be prevented without adding an electron blocking layer; and (4) the wetting performance of a solid-liquid interface is better than that of solid-solid interface contact, so that the steric hindrance between interfaces is reduced, and the very high coloring efficiency is realized.

To provide such a base multiplying agent capable of being used for crosslinking reaction, for example of a epoxy compound and the like, that generates another base by action of a base, and can efficiently perform base multiplying reaction, and a base-reactive curable composition using the base multiplying agent.

The base generating agent of the invention is represented by the following formula (1):

(In the formula (1), X represents a hydrogen atom, a substituted alkyl group or an unsubstituted alkyl group; Y represents a substituted or unsubstituted alkylene chain; and n represents an integer of from 1 to 4.)

An operating device with an operating piece, which may be positioned near the floor, includes at least one operating element for controlling a medical instrument. Operation of the medical instrument is possible by actuation of the at least one operating element by foot, such that the operator has hands free to use for further manipulation. A flexible positioning of the operating piece in a defined movement range is possible by arrangement of the operating device such as to be pivotable and/or extendable/retractable relative to the medical instrument which is good for operational manipulation. The operational device may be used during operation of a mammography device.

The invention discloses a highly connected coordination polymer and a preparation method thereof. The highly connected coordination polymer adopts the following chemical formula: [Zn5(3,3'-tmbpt)(btec)2(OH)2], wherein betc is deprotonated 1,2,4,5-pyromellitic acid; 3,3'-tmbpt is 1-((1H-1,2,4-triazole)methyl)-3,5-bis(3-pyridyl)-1,2,4-triazole. Carboxyl groups of polycarboxylic acid anions can coordinate with metal ions to form metal clusters with larger size; the metal clusters serve as nodes, so that connections of the nodes can be greatly increased. In addition, distances among several coordinating groups of a polydentate nitrogen-containing ligand 3,3'-tmbpt is relatively large, so that steric hindrance is relatively small during coordination, and the metal clusters can further expand easily to form the coordination polymer adopting highly connected structure. The coordination polymer can serve as a broadband semiconductor material and a molecular-based light emitting material to be further developed and applied.

The electrocatalytic compositions of this invention comprise a platinum-based electrocatalyst and polyvinylpyrrolidone (PVP), whereby the PVP improves certain properties of the platinum-based electrocatalyst. The electrolytic compositions described herein have applications in fuel cell technologies. The polymer-modified platinum-based electrocatalyst compositions exhibit an enhanced long-term CO tolerance with a small hindrance to the intrinsic activity of the platinum based electrocatalyst. Furthermore, the electrocatalytic compositions demonstrate improved catalyst stability.

The invention discloses acrylate resin containing a hyperbranched structure and a preparation method thereof. Two kinds of hyperbranched macromonomers, namely a polyester type hyperbranched macromonomer and a poly(ester-amide) type hyperbranched macromonomer, with internal double bonds and external reactive functional groups such as hydroxyl groups and carboxyl groups are synthesized by a stepwiseexpansion method. The hyperbranched macromers and a synthesis process thereof are characterized by an infrared measurement method, a GPC measurement method, an acid value measurement method and a hydroxyl number measurement method and other methods. The synthesized two hyperbranched macromonomers are applied to synthesis of acrylic resin, and the acrylate resin with an ultra-high branching structure and lower viscosity is prepared. The resin can be used for preparing high-solid-content self-drying coatings, high-solid-content baking coatings and high-solid-content two-component room temperature curing coatings and used as adhesives. The organic solvent content of the acrylate resin during production and use can be effectively reduced, the pollution to the environment can be reduced, and the performance is excellent.

The invention provides schizophyllan modified sodium hyaluronate microsphere gel, a preparation method of the sodium hyaluronate microsphere gel, and application of the sodium hyaluronate microspheregel in cosmetics. The method comprises the following steps: adding dried sodium hyaluronate powder into a hyaluronidase solution, and performing enzymolysis to obtain a sodium hyaluronate small-molecule solution; slowly adding the sodium hyaluronate small-molecule solution into a mixed oil phase, slowly stirring, adding a mixed cross-linking agent of calcium chloride and divinyl sulfone, cross-linking and curing to obtain sodium hyaluronate microspheres; adding the sodium hyaluronate microspheres and pre-treated schizophyllan into an alkaline solution containing polyethylene glycol, uniformlystirring, regulating the pH value of the system to be neutral, adding a phosphate buffer solution, standing and aging, thereby obtaining the schizophyllan modified sodium hyaluronate microsphere gel.The schizophyllan modified sodium hyaluronate microsphere gel prepared by the method disclosed by the invention is small in particle size, easily penetrates into the deep part of skin, can form tiny gel with protein-water, achieves the effect of deeply moisturizing for a long time, and has excellent moisture retention property.

The invention discloses a silicon-nitrogen compound as well as a preparation method and application thereof. The structural formula of the silicon-nitrogen compound is as shown in a formula I, wherein X radical is one radical or a combination of radicals selected from pyrazolyl, substituted pyrazolyl, imidazolyl, substituted imidazolyl or amino. The silicon-nitrogen compound disclosed by the invention has a higher vulcanization rate for RTV (Room Temperature Vulcanization) silicon rubber under the room temperature and can be used for providing better heat resistance to the silicon rubber, better bonding strength to the steel and bigger application value.