15results about How to "Short conversion time" patented technology

The invention belongs to the technical field of biomedicine, and particularly relates to application of GABA (gamma-aminobutyric acid) driven by lactobacillus rhamnosus to treatment of cerebral malaria of mice. According to the invention, the obviously enriched lactobacillus muricatum is found, and the lactobacillus muricatum is proved to be capable of generating GABA (gamma-aminobutyric acid). Afterwards, on the mouse cerebral malaria model, under the condition that the lactobacillus rhamnosus and the GABA are independently used or auxiliary dihydroartemisinin is used, the effect of the lactobacillus rhamnosus and the GABA on improving and treating the mouse cerebral malaria is evaluated. Results show that the strain and the metabolite GABA thereof can effectively improve behavioristics of mice and immune pathological injuries of all organs, reduce protozoemia and prolong the lifetime of the mice whether the strain is independently used or combined with dihydroartemisinin, and can effectively treat cerebral malaria of the mice compared with the strain which is independently used with drugs. The invention provides a brand-new solution for treating severe malaria, especially human brain malaria, caused by malignant malaria from the perspective that the probiotics drive metabolites of the probiotics to assist the anti-malarial drug in treating rat brain malaria.

The invention provides a calcium fluoride sludge purification method, calcium fluoride fine powder and application thereof, and belongs to the field of calcium fluoride sludge treatment.The calcium fluoride sludge purification method comprises the following steps that calcium fluoride sludge and water are mixed to form a first mixed solution, a phosphate conversion agent is added, heating and stirring are conducted, and then filtering is conducted to obtain a first solid mixture; adding an acid solution into the first solid mixture, heating, stirring and filtering to obtain a second solid mixture; and water, an inhibitor, a collecting agent and a foaming agent are sequentially added into the second solid mixture to form a third mixed solution, flotation is conducted, and calcium fluoride fine powder is obtained. Impurity elements can be removed through combination of phosphate conversion and a flotation method, and compared with a method for removing calcium phosphate and calcium sulfate through a chemical treatment method, the reagent dosage is greatly reduced, the temperature needed by conversion is low, the conversion time is short, and the cost is low.

The invention relates to the field of organic pigments, and discloses a preparation method and application of nano organic pigments with different crystal forms. The preparation method comprises the following steps: 1) dissolving an organic pigment crude product in a good solvent, and adding inorganic salt for activation; 2) dropwise adding a poor solvent at a gradient rate, adding a crystal form guiding agent, and inducing formation of a crystal nucleus; wherein the alpha crystal form directing agent is magnesium stearate; the beta crystal form directing agent is dibutyl phthalate; the gamma crystal form directing agent is polyethylene glycol; the initial gradient rate is 0.5-1 mL / min, and the gradient rate is increased by 0.2-0.3 mL / min every 8-12 min; 3) ultrasonic treatment; 4) cooling, and adding a surface modifier for surface modification; according to the preparation method, the nanometer organic pigment with the target crystal form can be accurately obtained through process regulation and control, the nanometer organic pigment is uniform in particle size distribution, good in dispersity, good in heat-resistant stability and high in color and luster strength, and the nanometer organic pigment has the advantages of being good in flocculation-resistant stability and weather resistance after a coating is formed.

A double-leaf flood-proof protective closed door without a threshold for a clean ventilation duct in an urban underground space, comprising: a door frame and a door leaf, the door leaf is arranged on the door frame through a liftable door shaft system; a locking system, the locking system is used to realize the locking of the door leaf on the door frame; an explosion-proof valve system, the explosion-proof valve system includes an explosion-proof valve assembly for installation on the vent and a small electric protective closed door arranged on the door leaf for closing the vent; a small flood-proof door system. The present invention is aimed at underground traffic tunnels and takes into account the defense requirements of civil air defense projects. According to the size characteristics of the openings of existing buildings, slope requirements and functional requirements, new protective equipment research and design are carried out, which at least includes the following beneficial effects: the door leaf of the present invention can be lifted and lowered, which can meet the requirements for opening and closing the door leaf at the ramp, especially for opening in the uphill direction. The door leaf can be lifted up by the door shaft system before or during opening, and its operation is simple and the conversion time is short.

The invention discloses a photosensitive chiral agent compound S, a cholesteric liquid crystal composition containing the photosensitive chiral agent compound S, and application of the cholesteric liquid crystal composition in liquid crystal display elements and liquid crystal displays. The photosensitive chiral agent compound S has the performance of high HTP value, good solubility and short conversion time, and the cholesteric liquid crystal composition containing the photosensitive chiral agent compound S has high reflectivity retention rate, ensures uniform RGB color and does not need tedious pixel design; the viscosity is low, so that the adhesive can adapt to the existing large-scale panel preparation process; and the UV color changing speed is high, the UV manufacturing time is shortened, the production cost is reduced, and the liquid crystal display film can be widely applied to optical devices such as liquid crystal electronic books, outdoor and vehicle-mounted displays and the like. # imgabs0 #

The invention discloses an operating mechanism and a dual-power change-over switch, the operating mechanism comprises a motor and a change-over assembly, the change-over assembly is connected with the motor through a driving rod, and the motor drives the change-over assembly to complete common and standby opening and closing; the switching assembly comprises a support, a common driving lever and a standby driving lever, the upper end of the common driving lever and the upper end of the standby driving lever are installed on the support in a sliding mode, the lower end of the common driving lever is connected with the support through a first elastic assembly, and the lower end of the standby driving lever is connected with the support through a second elastic assembly. Compared with the prior art, the operating mechanism is simple in structure, time-saving, labor-saving, convenient to assemble and reliable in interlocking.

The invention belongs to the technical field of food biology, and discloses a strain for producing inulin glycosyl transferase and application of the strain. The bacterial strain is classified and named as Paenarthrobacter aurescens QL1.001, and is preserved in the China Center for Type Culture Collection (CCTCC), the preservation number is CCTCC NO: M 2024550, and the preservation date is March 25, 2024. By optimizing an enzyme production fermentation process, the strain can generate high-activity inulin fructotransferase, the enzyme activity can reach 150-160 U / mL, the prepared inulin fructotransferase has excellent thermal stability, difructose anhydride III can be obtained by reacting the inulin fructotransferase with high-concentration inulin, the conversion time is shorter, conversion can be completed in 30 min, and the conversion rate can reach 95%.

The invention belongs to the technical field of unmanned aerial vehicles, and discloses a deformable four-rotor structure robot based on a rotary duct driver, which is composed of a rack, an FOC controller, the rotary duct driver and a deformation mechanism. The rack is in an I-shaped layout and is mainly composed of a front cross beam, a rear cross beam and a main longitudinal beam. Wherein the front and rear cross beams are fixed on the main longitudinal beams through flange bearings and can rotate around the transverse shaft; synchronous pulleys are mounted at the roots of the front and rear cross beams; the steering engine or the stepping motor is installed on the rack, and a synchronous belt wheel is installed on a rotating shaft of the steering engine or the stepping motor. The synchronous pulley on the rotating shaft of the steering engine or the stepping motor and the synchronous pulleys on the front cross beam and the rear cross beam are connected together through a synchronous belt and rotate synchronously. By means of the structure deformation mode, the robot has the underwater, ground and air triphibian maneuvering capacity, the multi-medium rapid conversion and maneuvering capacity of the robot in the complex landform environment is achieved, and the defect that a traditional split type amphibious robot is slow in state conversion is overcome.

This invention relates to the field of hydrogen energy production, specifically to a composite material for improving the performance of magnesium-based hydrolysis hydrogen production, comprising a Mg-Ca alloy and Mg2M, wherein the mass percentage of Mg2M is 8%-15%; and the mass percentage of Ca in the Mg-Ca alloy is 8%-12%. The preparation method includes: Mg-Ca alloy preparation: magnesium and calcium materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg-Ca alloy; Mg2M preparation: magnesium and Mg2M materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg2M material; Ball milling: the Mg-Ca alloy and Mg2M are mechanically crushed and then pre-ball milled, followed by fine ball milling. By implementing this method, the conversion time for hydrogen production from magnesium-based materials can be improved.

This invention relates to the field of pyrethroid synthesis methods, particularly a method for preparing highly efficient cis-cyhalothrin, especially focusing on the epimer separation and activity enhancement process. The method uses 3-phenoxy-4-fluorobenzaldehyde as a raw material, adds dichloroquine chloride (cis-acyl chloride) dropwise to prepare cis-cyhalothrin, and then uses cyclohexane, n-heptane, and isopropanol as solvents, and diisopropylamine-triethylamine and a novel ZnCl2-TPP metal complex as catalysts to carry out an epimerization reaction to obtain highly efficient cis-cyhalothrin. After adjusting the pH to neutral, the product is filtered to obtain a crude highly efficient cis isomer. The crude product is recrystallized from methanol and vacuum dried to obtain the technical grade of highly efficient cis-cyhalothrin. This invention provides an epimerization process in the preparation method of highly efficient cis-cyhalothrin, which has the advantages of high conversion efficiency, short conversion time, and high purity of the technical grade.

The invention relates to the technical field of microorganisms, and discloses a fungus, application thereof and a method for preparing resveratrol. The preservation number of the fungus (Penicillium georgiense) HZ01 is CDMCC (China General Microbiological Culture Collection Center) No: 67695. The fungus (Penicillium georgiense) HZ01 can generate high-activity beta-glucosidase, so that polygonum cuspidatum can be efficiently converted into resveratrol, the preparation time is short, the conversion rate of polydatin is high, and the yield and yield of resveratrol are higher; meanwhile, the preparation conditions are mild, safe, reliable and environment-friendly, and large-scale preparation is easy.

The invention discloses application of a GhSTM gene in improvement of genetic transformation efficiency of cotton. According to the invention, a novel GhSTM gene is cloned from cotton, an overexpression vector is constructed by using a DNA sequence of a CDS full-length fragment of the gene, then agrobacterium tumefaciens is introduced, the cotton is transformed by using an agrobacterium tumefaciens-mediated method, and in the process, it is found that compared with a transformed WMV067 empty vector, the overexpression GhSTM can screen out more green buds, improve the regeneration efficiency and shorten the transformation time. Meanwhile, the agrobacterium of the over-expressed GhSTM gene can greatly improve the transformation efficiency of the cotton, and especially solves the problem of genotype limitation of some main cultivated cotton varieties with low transformation efficiency. Therefore, overexpression of the gene and application of the gene to commercial cotton varieties difficult in genetic transformation contribute to improvement of the genetic transformation efficiency of the commercial cotton varieties, so that the yield, the quality and the stress resistance of high-quality cotton germplasm are improved, and the gene has important economic value and social benefit.

The invention belongs to the technical field of microbial fermentation, and particularly relates to a preparation method of an astragalus mongholicus fermentation product and application of the obtained astragalus mongholicus fermentation product in preparation of products for reducing blood sugar and blood fat and promoting absorption. The preparation method specifically comprises the following steps: (1) uniformly mixing radix astragali powder with water, and sterilizing to obtain a radix astragali aqueous solution; and (2) inoculating strains into the radix astragali aqueous solution, and carrying out ultrasonic-assisted fermentation, so as to obtain the radix astragali fermented product. The obtained astragalus mongholicus fermentation product has strong active hydroxyl free radical scavenging rate, iron ion reducing capacity and ABTS < + > free radical scavenging rate; the activity of inhibiting alpha-glucosidase, DPP-IV (dipeptidyl peptidase-IV) and pancreatic lipase is better; the content release of calycosin, total polyphenols and total flavonoids in the intestinal digestion process can be obviously improved.

This invention discloses a ferroelectric liquid crystal composition comprising a first component and a second component. The first component contains one or more compounds of general formula I, and the second component contains one or more compounds of general formula II. The ferroelectric liquid crystal composition has the advantages of high transmittance, high contrast, large phase transition range, small pitch, and high spontaneous polarization intensity. This invention also provides a display device comprising the ferroelectric liquid crystal composition.

The invention discloses an ultra-fast non-high-temperature DNA methylation conversion kit and a use method thereof. The kit is composed of a conversion solution, a protection solution, a binding solution, a rinsing solution, a desulfonation solution, an eluent and a DNA adsorption column. The conversion liquid is prepared from ammonium hydrogen sulfite, sodium hydrogen sulfite and water; the protection liquid is prepared from hydroquinone and water; the binding liquid is prepared from guanidine hydrochloride, sodium chloride and water; the rinsing liquid is prepared from Tris, ethanol and water; the desulfonation liquid is prepared from sodium hydroxide, ethanol and water; the eluent is prepared from a Tris-HCl buffer solution, EDTA (Ethylene Diamine Tetraacetic Acid) and water; and the DNA adsorption column is made of a silicon matrix material. According to the method, the direct transformation time of DNA methylation can be remarkably shortened, meanwhile, the destructive effect of high temperature on a DNA sample is avoided in a non-high-temperature transformation mode, and high recovery rate and high transformation efficiency are guaranteed.