178results about How to "Wide operating range" patented technology

The invention relates to chemical technical field, in particular to a method for using magnesia catalyst to catalyze and oxidize cyclone to synthesize lactone. The invention uses some nanometer sheet magnesia compound as catalyst, uses mixture of cyanobenzene and 1, 4-dioxane at a certain proportion as solvent, at a special reaction temperature, to catalyze and oxidize cyclone to synthesize lactone compound. The invention uses commercial cyclopentanone, cyclohexanone and adamantaneketone as raw materials, at mild condition, to reach the total yield of lactone compound more than 90%. The invention uses hydrogen dioxide water solution as oxidant, to eliminate the environment pollution of traditional oxidation process as peroxyacid, to realize environment-friend catalysis conversion. The invention has low cost, which can be used for industrialized lactone compound production.

The invention discloses an adsorption mechanism. The adsorption mechanism is used for adsorbing to position workpieces and comprises a substrate, wherein the substrate is used for placing workpieces; the substrate comprises an adsorption surface in which a plurality of air suction holes are formed; an air duct runs through the interior of the substrate; the air duct penetrates through at least one side surface of the substrate to form a main air hole; the main air hole is used for being connected with an external vacuum device so that the air duct can present negative pressure; a plurality of holding holes alternately run through the side surface of the substrate; each holding hole is communicated with a corresponding air suction hole in the adsorption surface; and the plurality of holding holes are communicated with the air duct; the adsorption mechanism furthermore comprises operating rods which are correspondingly held in the holding holes; the operating rods are capable of moving along the holding holes; and at the positions of the holding holes, the operating rods are capable of blocking the communication between the corresponding air suction holes and the air duct.

A system and a method implementing such a system. The system includes eyeglasses having hinged stems, a plurality of sensors and an alert alarm. The system further includes a triaxial accelerometer, an IR transmitter, an IR receiver, and a barometric sensor. The sensors are set up in the hinged stems and the rims of the eyeglasses and connected to a processing and calculation unit. The processing and calculation unit includes a microprocessor and a memory. The processing and calculation unit executes a computer program to analyze data issued by the sensors and triggers the alarm based on a result of the analyzed data.

The invention discloses a cement-based shrinkage-free grouting mortar which is characterized by comprising the following components in percentage by weight: 35%-42% of silicate cement, 5%-12% of aluminate cement, 6%-10% of gypsum, 40%-50% of aggregate, 0.8%-1.4% of high-efficiency water reducing agent, 0.05%-0.2% of coagulation-regulating agent, 0.4%-1.0% of defoamer and 1%-3% of bleeding resisting agent. The cement-based shrinkage-free grouting mortar is a gelled material which is prepared from the silicate cement, the aluminate cement and the gypsum and has stable performance, and the flow degree, coagulation time and expansion rate of the grouting mortar can be regulated according to the requirement of a user. After mixed with water, the grouting mortar has a good self-flowing property, no sedimentation and no bleeding; the grouting mortar has the characteristics of plastic micro-expansion property, no gap, high early strength, no contracted later strength, good durability, impermeability, freezing resistance and vibration resistance, low material price and wide raw material sources; and the grouting mortar is flexible to operate and is simple to use.

A system and a method implementing such a system. The system includes eyeglasses having hinged stems, a plurality of sensors and an alert alarm. The system further includes a triaxial accelerometer, an IR transmitter, an IR receiver, and a barometric sensor. The sensors are set up in the hinged stems and the rims of the eyeglasses and connected to a processing and calculation unit. The processing and calculation unit includes a microprocessor and a memory. The processing and calculation unit executes a computer program to analyze data issued by the sensors and triggers the alarm based on a result of the analyzed data.

The invention discloses a laminated laundry detergent tablet and a preparation method thereof. The laminated laundry detergent tablet is prepared from, by weight, 5%-10% of a non-ionic surfactant, 15%-35% of an anionic surfactant, 3%-10% of an auxiliary washing agent, 0.1%-5% of an adhesive, 40%-60% of a disintegrating agent, 0.1%-5% of a laminating agent and 1%-5% of a solvent. The laminated laundry detergent tablet which is made from biodegradable materials is highly concentrated, low in consumption and high in detergence; by combination of an effervescence system and a polymer swelling system, high disintegration speed is realized; due to water-soluble laminates on surfaces of material particles, interaction or dampness of a disintegration agent can be avoided, requirements on a storage environment are lowered, and the shelf life is prolonged. The preparation method is completed under a normal-temperature normal-pressure condition, convenient, quick and simple in operation, free of special equipment, wide in application range and low in cost.

The invention introduces an effective inductive cultivation method for an autotetraploid of paulownia catalpifolia by using leaves of a diplontic paulownia catalpifolia tissue culture seedling. The method comprises: pre-cultivating the leaves of paulownia catalpifolia for 6 days, wherein the concentration of added colchicine is 30 mg / L, the concentration of dimethyl sulfoxide is 2%, and the soaking time is 48 hours; performing shake cultivation, wherein the induction rate of the tetraploid paulownia catalpifolia reaches 14.5%; detecting that the chromosome number of root tip cells of variant plants of paulownia catalpifolia is 80 by virtue of a chromosome counting method, wherein the chromosome number is two times of that of the corresponding diplontic paulownia catalpifolia; and detecting that the unicellular DNA content of the tetraploid leaves of the paulownia catalpifolia are two times of those of the corresponding diplontic paulownia catalpifolia by using a flow cytometer, showing that a tetraploid paulownia catalpifolia plant is obtained. The cultivation method for inducing autotetraploid of paulownia catalpifolia by colchicine disclosed by the invention has the advantages of being wide in material drawing, simple and convenient to operate, low in cost, high in induction rate and the like, and is of certain guiding significance for woody plants, the tetraploid of which is not easily obtained.

The invention provides a portable pharmaceutical dispensing device. The device comprises a box body, the top of the box body is open, one side of the top surface of the box body is hinged to one sideof the bottom surface of a box cover, a clamp buckle seat is fixedly installed on the right side of the upper part of the box body, a clamp buckle member is fixedly installed on the right side of thebox cover, the right side of the box cover is matched with the right side of the box body through a clamp buckle, a handle is fixedly installed at the top surface of the box cover, a medicine preparing cylinder is arranged in the box body, a first bevel gear is fixedly installed on the outer circumference of the medicine preparing cylinder, a motor is movably installed on the left side of the inner wall of the box body, a second bevel gear is fixedly installed on the right end of the output shaft of the motor, and the first bevel gear engages with the second bevel gear. When a research and development experiment of a novel medicine is performed, the device provided by the invention can quickly complete medicine preparation, tedious steps when medical workers prepare the medicine are reduced, and the medical workers directly compare, analyze and record prepared different medicines; and the device can simplify a medicine preparing process in a pharmaceutical experiment, time of an entireexperimental process is relatively reduced, and efficiency of the pharmaceutical experiment is improved.

The invention belongs to the technical field of metal materials and metallurgy, and particularly relates to 700 Mpa-level austenite ferrite dual-phase low-density cast steel and a preparation method thereof. The technical problem to be solved by the invention is to provide 700 Mpa-level austenite ferrite dual-phase low-density cast steel. The cast steel comprises the following chemical componentsin percentage by mass: 0.01-1.0% of C, 0.1-0.2% of Si, 10.0-25.0% of Mn, 10.0-15.0% of Al, 0.01-1.0% of V, 0.01-1.0% of Nb, 0.01-1.0% of Ti, less than or equal to 0.01% of S, less than or equal to 0.02% of P, and the balance Fe and inevitable impurities; meanwhile, the weight percentage of Mn and Al satisfies the condition that the weight percentage of Mn plus Al is greater than or equal to 25% and less than or equal to 35%; and the weight percentage of Nb, V and Ti satisfies the condition that the weight percentage of Nb plus V plus Ti is greater than or equal to 0.05% and less than or equalto 0.5%. The cast steel has good mechanical properties.

The present invention provides for a one or more layer graphene optical modulator. In a first exemplary embodiment the optical modulator includes an optical waveguide, a nanoscale oxide spacer adjacent to a working region of the waveguide, and a monolayer graphene sheet adjacent to the spacer. In a second exemplary embodiment, the optical modulator includes at least one pair of active media, where the pair includes an oxide spacer, a first monolayer graphene sheet adjacent to a first side of the spacer, and a second monolayer graphene sheet adjacent to a second side of the spacer, and at least one optical waveguide adjacent to the pair.

The invention is a novel supported silver catalyst for preparing anhydrous formaldehyde by direct methanol dyhydrogenation. It is prepared by a sol-gel method (SOL-GEL method), i.e. mixing a certain amount of TEOS (tetraethoxysilane) with the water or alcohol solution containging soluble Zn and Al salts, then dripping to an inorganic silver salt water solution and preparing it through gelling, ageing, drying, baking, etc. During the gelling course, the Zn and Al salt solution added make acid-alkali neutralization to some extent, which largely enhances its activity and selectivity. It not only has high catalytic activity and longer service life but also simple and convenient to prepare, having lower price and suitable for industrial application.