37results about How to "Low experimental requirements" patented technology

The present invention relates to a controllable preparation method of a nitrogen-doped porous carbon-supported metal monoatomic material, and belongs to the technical field of material science and engineering. According to the present invention, porphyrin and a metalloporphyrin are polymerized through a polymerization reaction. The proportions of the porphyrin and the metalloporphyrin are regulated to regulate a metal content (0.06-4.00wt%), and monoatomic metal types (A type, AB type, ABC type) are regulated by regulating different types of metalloporphyrins. According to the present invention, controllable preparation of a metal monoatomic material is realized with good expansibility and reproducibility; meanwhile, the problems of low metal content, few types and the like in the prior art are solved, and researches in the related fields such as the synthetic methodology of metal monoatomic materials and the like.

The invention relates to the field of microbiological detection, in particular to a method and a device for microbiological analysis of a host sample. The method comprises the following steps: (1) performing first filtering processing on a sequencing data set from a host sample by adopting a host genome database so as to remove sequencing data which can be compared with the host genome database from the sequencing data set; (2) performing second filtering processing on the sequencing data set by adopting a homologous database so as to remove the sequencing data which can be compared with the homologous database from the sequencing data set; and (3) comparing the sequencing data set subjected to the first filtering treatment and the second filtering treatment with a microbial genome database so as to determine microbial sequencing data from the microorganisms in the sequencing data set. By applying the method and the device provided by the invention, rapid and accurate analysis and detection of microorganisms in a host can be realized.

A method for using vallisneriaceae to treat the nutrients-enriched water in lake includes cultivating vallisneriaceae, adding it to lake bottom, making it adapt the lake water for 3-5 days, and adding vallisneriaceae protecting agent and seaweeds growth inhibitor.

The invention discloses a grinding device for a biological tissue. The grinding device comprises a grinding table with a mechanical transmission case, wherein the grinding table is provided with a grinder, the grinder comprises a pair of base and upper cover, which are identical in shape and size, a plurality of concaved grinding cavities which are regularly arranged are formed in the upper surface of the base, each grinding cavity is in a semicircular ball-socket shape or a semi-elliptic ball-socket shape, and a circular grinding ball is arranged in each grinding cavity; a plurality of concave cavities with quantity identical to that of the grinding cavities of the base are formed in the upper surface of the upper cover, the concave cavities correspond to the grinding cavities of the base in position distribution, when the upper cover is turned to be connected with the base, the concave cavities of the upper over and the corresponding grinding cavities of the base are closed to form a plurality of circular spherical or elliptical spherical closed spaces, the biological tissue and the grinding balls are wrapped by the closed spaces, after the base and the upper cover are fixed by utilizing a clamp, the base is connected to the upper surface of the grinding table through a sliding part, and the upper cover is connected with a drive device in the mechanical transmission case through a crank linkage mechanism; a drawer for storing an ice box is arranged in the grinding table below the grinder.

The invention discloses a method for preparing a monatomic catalyst by atomizing a precursor. The preparation method comprises the following steps: step 1, atomizing and spraying a metal salt solutionto surfaces of different carrier by adopting a spray head to obtain a monatomic catalyst precursor; 2, drying the obtained monatomic catalyst precursor under an infrared lamp; repeating the first step and the second step for a plurality of times, and then putting the monatomic catalyst precursor into a drying box over one night; and finally, carrying out high-temperature roasting on the fully dried monatomic catalyst precursor, and cooling to room temperature to obtain the corresponding monatomic catalyst. The metal salt is dispersed on the surfaces of different carriers by using a simple spraying method, and the metal content is regulated and controlled by regulating and controlling the weight ratio of the metal salt to the carriers; the metal monatomic species are regulated and controlled by regulating and controlling the species of different metal salts; different carriers are selected to regulate and control the types of the carriers; and by regulating and controlling roasting conditions, metal single atoms are tightly combined with defect sites of elements such as oxygen and nitrogen in the carriers, the preparation of the single-atom catalyst is realized.

The invention discloses a method for preparing a nano ZnO-GO/waterborne polyurethane super-amphiphobic coating through a spraying method. An ultrasonic hydrothermal composite method is adopted, nano zinc oxide is modified through perfluorooctyl trichlorosilane, then the modified nano ZnO carries GO, and nano ZnO-GO composite substance is obtained; a waterborne polyurethane layer is prepare on thesurface of a substrate; then a low-surfacce-energy nano ZnO-GO composite substance layer is established on the surface of the waterborne polyurethane layer; and after coating curing is finished, the surface topography and the static contact angle of a cured coating are tested. By means of the method, the surface energy of the nano zinc oxide is lowered, the surface hydrophobicity and lipophobicityof the nano ZnO-GO composite substance layer after fluoridation treatment are improved, the super-amphiphobic effect is achieved, and the stability of the coating is improved. The method is low in production cost, the preparation method is simple, the requirement for a reaction facility is low, the reaction conditions are mild, no environmental pollution occurs, and large-scale production can beachieved.

The invention discloses an asynchronously matched measurement equipment-independent quantum key distribution method and system. The key limitation is broken through by using a post-matching method to realize time-phase coded two-photon Bell state measurement, and compared with the existing measurement equipment-independent quantum key distribution, the method provided by the invention can provide a higher security code rate, achieves farther transmission distance; meanwhile, under the condition that the transmission distance is not greater than 490 km, the method can select a short time interval for random matching, so that phase drift caused by channel transmission does not need to be calibrated; under the condition that the transmission distance is not greater than 370 km, rapid active phase locking and frequency locking of the laser are not needed, the experiment requirements are reduced, the safety and the practicability are greatly improved, and the experiment cost is saved.

The invention provides a high-voltage capacitor low-voltage electrode micro-displacement measurement device based on electrode displacement in the field of capacitor voltage coefficient measurement. The device comprises a capacitance bridge, a high-voltage power source, a tilting rotating platform and a CCD high-voltage standard capacitor; the tilting rotating platform comprises an underframe, a tilting bracket, a bracket support, a rotating component, a plurality of bolts, a first motor, a second motor and a control cabinet; and the CCD high-voltage standard capacitor is installed on the tilting rotating platform and tilts and rotates through the tilting rotating platform. The invention further provides four capacitor voltage coefficient measurement methods based on high-voltage capacitorelectrode micro-displacement measurement. The measurement device and method have the advantages that the standard device and the measurement method for high-voltage standard capacitor voltage coefficient absolute measurement are provided, measurement experiment steps are simple and visual, the experimental requirement on high-voltage standard capacitor voltage coefficient absolute measurement isgreatly lowered, and the operability of an experiment is improved.

The invention discloses an agar solution, which comprises agar and alkali, wherein the concentration of agar is 2-3%(w/v), the concentration of alkali is no less than 0.8mol/L. The invention also provides a detection kit including the above mentioned agar solution and a detection method of the kit. The kit is employed for detecting the antibacterial peptide activity, the detection result is accurate and reliable, and the kit has low requirement for the experiment condition, the operation is simple, ordinary people can use the kit, and the practicality is strong.

The invention provides a portable fluorescence microscope based on a smart phone and a working method thereof. The portable fluorescence microscope based on a smart phone comprises a smart phone and aportable fluorescence microscope arranged on the smart phone. The portable fluorescence microscope comprises a fluorescence excitation light source, a collimating lens, a light filter group and an objective lens. The collimating lens is perpendicular to the light emitted by the fluorescence excitation light source. The light filter group is parallel to the collimating lens. The objective lens isperpendicular to the collimating lens. The objective lens is arranged before a sample to be detected. The built-in lens of the smart phone is parallel to the objective lens. The fluorescence excitation light source irradiates the sample to be detected after passing through the collimating lens and the light filter group. The reflected light of the sample to be detected is received by the built-inlens of the smart phone via the light filter group. By using the portable fluorescence microscope of the invention, the microscopic sample fluorescence analysis experiment is greatly simplified, and the high requirement of the conventional microscope for the experimental environments and conditions is lowered. The portable fluorescence microscope is a practical application of the Internet technology and intelligent communication in basic scientific research.

The invention discloses a method for preparing a dense electrophoretic coating on a magnesium alloy surface, and belongs to the field of metal material surface treatment. The method specifically includes the following steps that pretreatment is performed on a magnesium alloy; the magnesium alloy surface is subjected to ionic liquid electroplating with aluminum; electrophoretic paint is prepared; and the magnesium alloy surface is coated with the electrophoretic paint. Before coating with the electrophoretic coating, aluminum plating is deposited on the magnesium alloy surface through ionic liquid electroplating, electrophoretic coating is performed on the prepared aluminum plating, the aluminum plating can effectively solve the problems that the magnesium alloy surface is non-uniform in potential and the magnesium alloy is prone to corrosion in an electrophoretic liquid, and thus the prepared electrophoretic coating is denser. According to the method, the production process is simple and efficient, the requirements for the whole experimental process are not high, the prepared magnesium alloy surface is uniform, dense and flat in electrophoretic coating, and the magnesium alloy canbe effectively protected against the harm caused by corrosion. The result of a neutral salt spray test indicates that the magnesium alloy surface is not corroded after being located in the neutral salt spray environment for 500 h, and the electrophoretic coating is complete and free of damage.