87results about How to "Structure determination" patented technology

A tamper-evident tab construction for a thermoformed package. In one embodiment, the package includes top and bottom parts with overlapping tabs. The top and bottom parts may include locking tabs that interlock with one another and provide a structure for holding the package while it is being opened. The top part may also include a pull tab located proximate the locking tabs. The pull tab is configured to provide a structure for pulling the top part away from the bottom part to open the package. The pull tab may be joined to the top part by a small land of material that is configured to deform when the package is opened. As a result, the pull tab may remain at an angle after opening to provide a visual indication that the package may have been opened or tampered with.

The invention provides a high-activity hydrocracking catalyst and a preparation method thereof, relates to a porous solid catalyst and a preparation method thereof, and provides the high-activity hydrocracking catalyst using tetraethoxysilane as a silicon oxide source and citric acid as a complexing agent and the preparation method thereof. The catalyst comprises the following components in percentage by mass: 10 to 50 percent of an acid component, 5 to 10 percent of a hydrogenation component, and the balance of a vector, wherein the acid component is cesium phosphotungstate, the hydrogenation component is nickel, and the vector is silicon oxide. Water soluble nickel salt and water soluble cesium salt which are prepared by the catalyst in the set component content are added to the complexing agent aqueous solution respectively to prepare solution A; and the silicon source which is figured out according to the set content of the silicon oxide in the catalyst is added to the solution A to prepare solution B; and heteropoly acid aqueous solution prepared according to the set component content of the catalyst is added into the solution B, the solution is evaporated and dried, and the obtained solid is roasted to obtain the catalyst.

The invention relates to a preparation method for a low-formaldehyde melamine resin retanning agent. The method comprises the following steps: preparation of a terminated modified monomer from a phenolic monomer with functionality of 1 to 6; synthesis of (hydroxymethyl)melamine; termination condensation of the terminated modified monomer and (hydroxymethyl)melamine; and preparation of the retanning agent. The retanning agent prepared in the invention has reasonable melamine resin molecular weight and extremely low free formaldehyde content and is applicable to leather production; and the content of free formaldehyde in produced leather reaches the standard, and the free formaldehyde content is lower than 75 ppm, reaching European standards Class B.

The invention discloses a hydrocracking catalyst and a preparation method thereof, which relate to a hydrocracking catalyst, in particular a hydrocracking catalyst for long-chain alkane. The invention provides a hydrocracking catalyst with high selectivity and a preparation method thereof. The hydrocracking catalyst comprises an acidic component and a hydrogenation component, wherein the acidic component is cesium phosphotungstate, the hydrogenation component is nickel, and the mole ratio of the hydrogenation component to the acidic component is between 8 and 24. The preparation method comprises the following steps: mixing a water-soluble cesium salt, a water-soluble nickel salt and a complexing agent to prepare mixed solution according to the mole ratio of 1:(8-48):(16-96); adding phosphotungstic acid to the mixed solution according to the mole ratio of the cesium salt to the phosphotungstate acid being 1:(0.5-1); and stirring the mixture until glue is formed; drying and baking the glue to prepare the hydrocracking catalyst. The conversion ratio obtained when the catalyst is applied to a hydrocracking reaction and the C5 selectivity of a cracked product reach more than 80 percent. Compared with other catalysts, the hydrocracking catalyst improves the C5 selectivity obviously under the same reaction condition.

The invention relates to the technical field of solar batteries and in particular relates to a cathode interface modification material as well as a preparation method and application thereof. The cathode interface modification material has a structural formula I as shown in the specification, in the formula, R1 is selected from any one of H and formulae as shown in the specification, and R2 is selected from any one of formulae as shown in the specification. The cathode interface modification material provided by the invention has high photoelectric conversion efficiency, can be applied to organic polymer solar batteries and particularly applied to non-fullerene solar batteries. According to the cathode interface modification material provided by the invention, lateral groups of which the steric hindrance is gradually increased are introduced into both sides of perylene bisimide, so that perylene bisimide molecules are further twisted, regulation and control on molecule accumulation states can be achieved, the morphology and the device efficiency of a membrane can be optimized, and the photoelectric conversion efficiency can be improved.

The invention discloses an organic small-molecule donor photovoltaic material containing fluorinated benzotriazole as well as a preparation method and application of the organic small-molecule donor photovoltaic material. The organic small-molecule donor photovoltaic material has a structural formula as shown in formula I, wherein X is H or F; Z is O, S or Se; R1, R2 and R3 are independently selected from H, C1-C30 alkyl groups, C3-C30 naphthenic bases, C1-C30 alkoxy groups, C1-C30 alkyl sulphanyls, halogeneated C1-C30 alkyl groups, halogeneated C3-C30 naphthenic bases and halogeneated C1-C30 alkoxy groups; each of A1 and A2 is an organic conjugated unit; and n is a natural number from 1 to 10. The application of an organic photoelectric compound to the following functional energy devices including a solar battery, a field effect transistor, an organic light emitting diode and a photovoltaic device also belongs to the protection scope of the invention. The organic photoelectric compound provided by the invention is simple in synthesis step, easy to purify and determined in structure; and the organic photovoltaic device prepared from the organic photoelectric material provided by the invention has excellent photovoltaic property, and the photoelectric conversion efficiency can reach 9.5%.

In a home bus system in which a multiplicity of networks each having a multiplicity of appliances connected thereto are connected one another, information is easily exchanged between appliances over different networks. An address configuration that is processed in application software and communication middleware has a network ID and a network appliance ID. On each network, there is provided a particular router having information about all the connections of other networks than the each network. Under this configuration, an appliance transmits a message directed to another network, only to a particular router and the particular router establishes an appropriate route for transmission, as considering the actual states of the networks.

The invention provides a preparation method of a supported vanadium-substituted Keggin type polyacid desulfurization catalyst porous nanocrystal. The catalyst is formed by using a three-dimensional porous main body framework constituted by copper and trimesic acid through a coordination bond to support vanadium-substituted Keggin type molybdatophosphoric acid. Polyacid is orderly arranged in the main body framework in an object form, and the supporting amount is above 54%. The nanocrystal catalyst can be synthesized by a room-temperature solid phase or room-temperature liquid phase method and be stably dispersed in an oil phase. Under mild conditions, molecular oxygen is taken as an oxidant, and the nanocrystal can efficiently realize catalytic oxidation of aromatic sulfides in fuel oil and further realize deep desulfurization. The catalyst can be recovered by centrifugal operation and be reused mainly times after drying treatment. The preparation method of the polyacid nanocrystal desulfurization catalyst, provided by the invention, is simple, can effectively solve the technical difficult problems of immobilization, separation, recovery, reuse and stable dispersion in the oil phase of the polyacid catalyst, and is suitable for industrial production.

The invention discloses an alcohol-soluble conjugate organic micromolecular material for a cathode interface of a solar cell, and a preparation method and purpose thereof. Specifically, the invention provides a compound shown as a formula I; and the groups are defined as in the specification. The material has the characteristics of clear structure, simple synthesis, easiness for purification and good dissolvability, can be used as the cathode interface modification material for solar cell devices, and has superior performances.

The invention belongs to the field of supramolecular gel, and more particularly relates to a visible light response supramolecular gel and a preparation method thereof. The supramolecular gel comprises a gel factor and an organic solvent, and the supramolecular gel can undergo reversible gel-sol phase transformation under visible light irradiation, wherein the gel factor comprises a halogen bond receptor and a halogen bond donor. The halogen bond receptor contains an electron donating group. The halogen bond donor is a visible light responsive azobenzene derivative in which an electron withdrawing or electron donating group is introduced at the ortho or meta position. According to the invention, through improving the structure of the key gel factor, a halogen bond driven visible light response supramolecular gel is prepared, and compared with the prior art, the problems that the ultraviolet light response supramolecular gel system is not healthy and environment-friendly enough and thevisible light response supramolecular gel system has too few selectable driving force types, thus limiting further development and practical application can be effectively solved.

The invention relates to a method for preparing, separating and purifying anticoagulant peptide by hydrolyzing yak milk casein with trypsin. The method comprises the following steps: (1), adjusting the reaction temperature at 30-50 DEG C and pH at 5.5-7.5, and stirring to dissolve yak milk casein; (2) hydrolyzing by adding trypsin, maintaining the reaction temperature at 30 DEG C and pH at 5.5-7.5, and hydrolyzing for 1-4 hours; (3) heating to 80-100 DEG C, maintaining for 5-15 minutes, and inactivating trypsin; (4) adjusting pH to 4.6 with 5mol/L edible grade hydrochloric acid to separate out casein at an isoelectric point thereof; (5) centrifugalizing for 5-10 minutes by a centrifugal force at 4000-10000g to remove precipitates and reserving supernate; (6) spraying and drying the supernate; (7) separating and purifying hydrolysates by a glucan column; (8) detecting the activities of the components by an agarose-fibrous protein flat band method; and (9) detecting an amino acid sequence: detecting the amino acid sequence of the yak milk casein anticoagulant peptide by an N-terminal sequencing method.

The invention discloses a donor material based on a fluorooxindole-containing compound. The donor material has a chemical structure general formula shown in the description. The organic photoelectricmaterial provided by the invention has simple synthetic steps and a determined structure, and is easy to purify; and an organic photovoltaic device prepared by the organic donor material provided by the invention does not need tedious post-treatment, a thick-film device with higher photoelectric conversion efficiency can be obtained only through simple solution spin coating, a thickness of an active layer can be changed in the range of 120-230nm, the photoelectric conversion efficiency can be maintained at 5.3%-7.8%, a highest photoelectric conversion rate can reach 7.80%, and the donor material has potentiality of ''roll-to-roll'' preparation or printing preparation of a large-area photovoltaic device and good application value.

The invention discloses a method for rapidly separating and purifying polyphenol compounds in sorbus pohuashanensis berries. The method comprises the steps as follows: mashing sorbus pohuashanensis berries, adding an ethanol solution for ultrasonic extraction, and performing concentration under reduced pressure to obtain crude extract of sorbus pohuashanensis berries; performing gradient elution by a polyamide chromatographic column with ethanol as an eluant, and performing concentration under reduced pressure to obtain eluates with different gradient fractions; separating and purifying the eluates with different gradient fractions with HSCCC (high-speed counter-current chromatography) to obtain neochlorogenic acid, chlorogenic acid, quercetin-3-O-(6''-alpha-L)-rhamnosyl-4'''-alpha-L-rhamnosyl)-beta-D-glucoside, 3,5-O-dicaffeoylquinic acid and rutin with purity higher than 95% respectively. The method adopts a simple process, is high in separation speed and low in comprehensive cost and has very good promotional and use values, and the product purity is high.

The invention discloses a capsizing moment testing machine for measuring a rotating drive pair and a special-type turntable bearing. The capsizing moment testing machine is mainly composed of a vertical beam (4), a transverse beam (6), a base (16), force sensors (21), a weight frame (25) and a computer (28). One end of the transverse beam (6) is connected with the upper end of the vertical beam (4), the vertical beam (4) is located on the base (16), and the rotating drive pair to be measured or the special-type turntable bearing to be measured is installed between the vertical beam and the base. A weight with the corresponding weight is added into the weight frame (25) hung at a force arm of the transverse beam (6), mechanics data signals collected by the corresponding force sensor (21) are transmitted to the computer (28) for numerical analysis calculation. By means of the capsizing moment testing machine, due to capsizing moment testing and measurement on the rotating drive pair and the special-type turntable bearing and capsizing resistant capacity destructive testing on the rotating drive pair, the reasonable safety coefficient is designed. The capsizing moment testing machine has the advantages of being easy and convenient to operate, reliable in performance, accurate in testing, visual, convenient to use and the like.

The present invention discloses fatty chain end group diamine substituted hypocrellin derivatives, including 2-site amino substituted hypocrellin A, 2-site amino substituted hypocrellin B, and Schiff base formed with hypocrellin A or hypocrellin B with diamine in the site-17. Compared with hypocrellin A and hypocrellin B, the products of the present invention has stronger absorption in phototherapeutic window of 600-900 nm, can produce active oxygen in photosensitive condition, and has powerful photodynamic effect and low dark toxicity. The present invention also discloses the preparation process and the use in preparing medicine for treating cancer and AIDS.

The invention discloses a near-bit electromagnetic wave electrical resistivity and gamma logging instrument. The near-bit electromagnetic wave electrical resistivity and gamma logging instrument comprises a transmitting section and a receiving section. The transmitting section comprises a gamma detector, a gravity sensor, a transmitting circuit unit, an electromagnetic wave transmitting device, and a transmitting antenna; and the receiving section comprises receiving antennas, a receiving circuit unit, logging-while-frilling electrical resistivity (EPR), and logging-while-frilling electromagnetic wave electrical resistivity (AER). An electromagnetic wave signal is subjected to power amplification and is transmitted and output by the transmitting antenna, the electromagnetic wave signal, output by the transmitting antenna and passing through underground well floors, is received by the two receiving antennas, andthe signal is subjected to differential amplification and pass filter, and is sent to a digital signal processing unit for processing after being converted into a digital signal; a gamma signal adopts wireless electromagnetic transmission and a drill collar is used as a medium to transmit an electric signal to complete short distance wireless transmission of information; near-bit gamma measurement can be provided, the distance to a drill bit is short, accurate measurementis achieved, and a reservoir boundary can be measured earlier.