6results about How to "Convenient and efficient" patented technology

The application relates to a powder discharging and static electricity removing structure and a bean grinder. The bean grinder is provided with the powder discharging and static electricity removing structure. The powder discharging and static electricity removing structure comprises a powder discharging channel. A first plasma generator assembly capable of removing static electricity of powder in a cavity of the powder discharging channel is arranged at the top end of the powder discharging channel. A powder receiving hopper capable of receiving the powder falling from the powder discharging channel is arranged at the bottom end of the powder discharging channel. The powder discharging channel of the bean grinder is separated from the coffee brewing device, so that the powder discharging channel of the bean grinder is not prone to damp, and the amount of residual powder is reduced. The powder receiving hopper is arranged between the powder discharging channel of the bean grinder and the coffee brewing device. The powder receiving hopper can control the floating powder and also can be used as a special powder receiving container for testing the powder discharging precision of the bean grinder, so that one thing has two uses, and the method is convenient and efficient. The static electricity removing device is arranged at the powder discharging joint, so that the floating powder can be prevented, the surrounding environment can be disinfected and killed, and the food safety is effectively ensured.

The present specification relates to a compound of Chemical Formula 1 and an organic light-emitting device comprising the same. The compound may improve efficiency, low operating voltage, and / or lifespan characteristics of an organic light emitting device. In particular, the compounds described in the present disclosure may be used as materials for light emitting layers. Further, it provides effects of reducing an operating voltage, improving high efficiency, and / or improving a long lifetime compared to an existing organic light-emitting device.

The utility model belongs to the technical field of bridge erecting, and particularly relates to a tadpole-shaped bridge erecting machine which comprises a front fixed bearing supporting leg, the upper portion of the front fixed supporting leg is fixedly connected to the front end of a main box girder, and sliding plates on the upper portions of a front middle supporting leg and a rear middle supporting leg are tightly attached to the lower portion of a track of the main box girder and support the main box girder. The lower portions of the front middle supporting leg and the rear middle supporting leg are supported on an erected beam face through jacking oil cylinders, the upper portion of the rear auxiliary supporting leg is connected with a rear guide beam lower chord, the main box girder is distributed at the front end of the bridge girder erection machine and is of a rectangular box girder structure, a track for a lifting crown block to walk is arranged on the upper portion of the main box girder, and a sliding track for the main box girder to move is arranged on the lower portion of the main box girder. According to the bridge girder erection machine, the relative positions of the guide beam and the main box girder are adjusted, the large main box girder for bearing the bridge girder is arranged in front, then the safe and reliable front fixed bearing supporting leg is arranged to stand on a half pier body, and then the two large hoisting crown blocks are used as counterweights, so that the requirements of safe girder erection and rapid hole passing are met.

The application provides a solder pre-planting device, a pre-planting process and a packaging method. The device realizes accurate positioning and hovering control of the solder pad through the collaborative design of the T-shaped cavity structure, the height adjusting mechanism and the needle stopper. The micron-level annular gap realizes heat insulation and overflow prevention. The size is optimized to balance the installation tolerance and the alignment accuracy, and manual and automatic adjustment modes are provided to balance the operation flexibility and the automation prospect. The design significantly improves the solder forming stability and the product yield. The pre-planting process based on the device can form a standardized solder body in an independent station, and the packaging method realizes reliable connection through two reflow soldering. The overall scheme simplifies the production process, reduces the dependence on precision printing process, improves the automation level, and realizes efficiency improvement and cost optimization.

The invention relates to the technical field of improved breeding of animal husbandry, and particularly discloses an improved NK cell culture medium and a preparation method thereof. The improved NK cell culture medium comprises a basic culture medium, a supplement and a composite sustained-release body. All the components are mixed according to a specific proportion, and the requirements of NK cell proliferation and function maintenance are met. Wherein the inner layer of the composite sustained-release body takes trehalose and human recombinant serum albumin as protective agents to wrap the interleukin, and the outer layer of the composite sustained-release body is an acrylate prepolymer photocuring polymer containing a photoinitiator, so that the continuous and stable release of the interleukin is realized. Through component optimization and slow release system design, the NK cell culture efficiency and activity are effectively improved, and the method is suitable for NK cell multiplication culture.

The invention belongs to the technical field of biology, and discloses a primer group and application thereof, and a kit for detecting RPA-CRISPR / Cas12a of ALV-F. According to the technical scheme, the primer group for specifically amplifying an ALV-F sequence is characterized by comprising an upstream primer and a downstream primer, the nucleotide sequence of the upstream primer is as shown in SEQ ID NO.1, and the nucleotide sequence of the downstream primer is as shown in SEQ ID NO.2; the nucleotide sequence of the downstream primer is as shown in SEQ ID NO. 2; based on a conserved region of an avian leukosis virus (ALV) F subgroup genome, a set of RPA primer group and crRNA with high specificity and high amplification efficiency are autonomously designed and verified. According to the design, the genetic diversity of target viruses is effectively covered, high specificity of detection on ALV-F subgroups is ensured, and the risk of cross reaction with other poultry pathogens is reduced to the maximum extent.