34results about How to "Mild structure" patented technology

The invention discloses a preparation method and an application of a nitrogen-doped porous carbon material. A series of alginic acid proton ionic liquids are prepared based on the presence of a carboxyl group in the molecular structure of alginic acid by using a reaction of the carboxyl group and organic bases having different structures, the reaction is mild, the structures of the alginic acid proton ionic liquids can be easily and conveniently adjusted by regulating the structures of the organic bases in order to achieve the purpose of regulating the content and the kind of nitrogen in the nitrogen-doped porous carbon material and a precursor thereof, the alginic acid is doped with nitrogen in situ at the molecular level to solve the key problem of uncontrollability of a carbon source and a nitrogen source in order to realize the high-value utilization of a nitrogen-containing carbon material, and the alginic acid-based nitrogen-containing carbon material can be successful individually used as an electrode material, and can be successfully applied to the field of energy storage.

The invention relates to polycarbonate polyurethane and a green preparation method thereof. The polycarbonate polyurethane comprises polyurethane structural units and aliphatic polycarbonate structural units which are irregularly distributed. The polycarbonate polyurethane is successfully prepared by a nonisocyanate method, so that isocyanate and solvents are not used, and the development requirements of green chemical industry are met. In addition, the green preparation method of the polycarbonate polyurethane is relatively mild in reaction condition and low in requirement on devices; by selecting raw materials with different structures, the polycarbonate polyurethane having different linear structures and comprising two irregularly distributed structural units can be prepared, so that the structures are diverse and controllable; the prepared polycarbonate polyurethane is free of residue of isocyanate monomers, so that the application of polycarbonate polyurethane to the fields of foods and medicines is broadened.

The invention relates to O-unsaturated fatty acid acylated chitosan oligosaccharides, which are characterized in that the O-unsaturated fatty acid acylated chitosan oligosaccharides are a mixed component and have a molecular weight of 800-25000 Da; the deacelation degree of the mixed component is 50-100%; the substitution degree of O-unsaturated fatty acid is 30-200%; and the components of the O-unsaturated fatty acid acylated chitosan oligosaccharides have a structure shown in the specification, wherein R1 is H or CH3CO-, R2 is C12-22 unsaturated fatty acid acyl or H, and n is 0-30. The O-unsaturated fatty acid acylated chitosan oligosaccharides have activities of resisting oxidation, delaying aging, inhibiting tumor, resisting inflammation, lowering blood pressure, preventing thrombosis, improving diabetes mellitus, lowering blood sugar, resisting atherosclerosis and the like, and can be used as important raw materials for medicines, health-care food and cosmetics.

The invention relates to a method for preparing nanometer peanut protein powder. It takes condensed peanut protein powder (defatted protein powder) as raw material, employs dynamic ultra-pressure homogenizing to replace traditional dry processing treatment, and prepares final product through spray drying. The invention is characterized in that: (1) it modifies condensed peanut protein powder (separated powder) by using physical modification to loose structure of peanut protein, which is favorable for subsequent process; the treating condition is temperate and the water retention and other function of condensed peanut protein can be maintained; (2) it removes unpleasant odor and makes it more acceptable; (3) the treatment of dynamic ultra-pressure homogenizing makes the granule be smaller than 200 nm, and the taste is much better; (4) the process is simple and easier for industrialization.

The invention discloses a method for extracting coronatine from fermentation liquor by using a membrane separation technique, comprising micro-filtration and hyper-filtration steps: filtering a fermentation liquor containing coronatine by a micro filtering membrane with the aperture of 0.1-10 Mum so as to remove impurity particles and thalli; then filtering the liquor by a hyper-filtration membrane with the aperture of 0.001-0.1 Mum so as to remove macromolecule impurities of proteins, nucleic acids and colloid granules to obtain clear filtrate; and then carrying out common resin exchange or column chromatography, concentrating and crystallizing to obtain the coronatine. In order to improve the effect of separating purification, pre-treatment can be added before the micro-filtration, namely, the coronatine fermentation liquor is filtered though the filtration membrane with the aperture of 1-10 Mum; nano-filtration can be added after the hyper-filtration, namely, the effluence liquor isfiltered by a nano-membrane system with cut-off molecular weight of 400-800. The method in the invention has simple operation and high yield which can be over 90%; in addition, the method has no influence on the structure and activity of the coronatine; and has low energy consumption and low pollution, thus completely satisfying the requirements of industrialized production.

The invention discloses a remediation tank for heavy metal contaminated soil. The remediation tank comprises a tank body, the bottom of the tank body is obliquely arranged, the inclination angle is 5-10 DEG, a waterproof layer is laid on the bottom of the tank body, the inclined lower end of the tank body communicates with a water discharge pipe, the water discharge tube is provided with a water discharge valve, and a soil turning device is arranged in the tank body. The remediation tank can conveniently remediate soil, can turn the soil easily by arranging the soil turning device, and avoidsanother soil turning devices from being manually operated for soil turning remediation; and a method for remediating soil by adopting a chemical leaching agent makes the contaminated soil transferredinto the remediation tank and remediated, so the chemical leaching agent is prevented from being added to affect other soils.

The invention relates to the technical field of biochemistry, and discloses a harengula zunasi glycoprotein extracting method and application. The extracting method comprises steps of pretreatment, ultrasonic treatment plus hot water extraction, concentrated alcohol precipitation, washing and purification, dialysis and freeze drying and the like. Through a single factor experiment and an orthogonal experiment method, the harengula zunasi glycoprotein extracting process is comparatively optimized, and the best harengula zunasi glycoprotein extracting process parameters are obtained. The harengula zunasi glycoprotein extracting method disclosed in the invention has the advantages that the design is reasonable, the process is simple, the product extraction rate is high, the use of a large amount of a toxic solvent is not needed, the product safety is good, the preparation cost is low, promotion and application are easy and the like. A cell experiment verifies and shows that the harengulazunasi glycoprotein plays a significant role in regulation of cellular immunity, which provides a reference for application of the harengula zunasi glycoprotein to the development of pharmaceuticals and foods.

The invention relates to a macrocyclic lactam compound containing a rigid biaryl skeleton and a preparation method thereof, and mainly solves the technical problem that currently there are few macrocyclic lactam compounds containing a rigid biaryl skeleton linked by carbon-nitrogen bonds. The technical scheme of the present invention: the macrocyclic lactam compound containing rigid biaryl skeleton is characterized in that it has the following general structural formula: R1 and R2 are alkyl, cycloalkyl, aryl or alkyl are connected with heteroatom and aromatic One of the substituents of the group.

The invention relates to a method for extracting low-molecular-weight lignin from walnut shells by graded sedimentation through alkaline tetrahydrofurfuryl alcohol. The method comprises the following steps: 1) crushing, sieving, washing and drying the walnut shells to obtain walnut shell powder, adding alkaline tetrahydrofurfuryl alcohol according to a certain solid-to-liquid ratio, conducting pre-treating at a certain temperature for a period of time to obtain mixed slurry, and performing reduced-pressure suction filtration on the mixed slurry to obtain a filtrate; 2) adding water into the filtrate, adjusting a pH value to 6, then carrying out primary centrifugation, and drying a precipitate to obtain a lignin fraction I; 3) adjusting the pH value of supernatant obtained after centrifugation to 4, then carrying out secondary centrifugation, and conducting drying to obtain a lignin fraction II; and 4) adjusting the pH value of a supernatant obtained after centrifugation to 2, then carrying out tertiary centrifugation, and performing drying to obtain a lignin fraction III. According to the method, the lignin is efficiently extracted from the walnut shells by using the alkaline tetrahydrofurfuryl alcohol, and then fractionation is performed through an acid precipitation method, so the lignin which is low in molecular weight, uniform in distribution and high in reaction activity is finally obtained.