2 results about "Entrapment" patented technology

The invention provides application of terpene as an acantholyda posticalis attractant and the acantholyda posticalis attractant. One or more of R-(+)-alpha-pinene, S-(-)-alpha-pinene, S-(-)-beta-pinene, S-(+)-3-carene, S-(+)-limonene, S-(-)-limonene and myrcene is used as the acantholyda posticalis attractant. The mixed terpene attractant consists of the R-(+)-alpha-pinene, the S-(-)-alpha-pinene, the S-(-)-beta-pinene, the S-(+)-3-carene, the S-(+)-limonene, the S-(-)-limonene and the myrcene in a volume ratio of 10-60:5-45:3-30:10-60:2-15:0.3-3:2-15, and more preferably 30:15:10:30:5:1:5. The plant source attractant of a host volatile matter is used for attracting a large amount of acantholyda posticalis, so that the acantholyda posticalis are gathered and fixed by an adhesive paper board and then cleared and pests are controlled and killed; and the acantholyda posticalis attractant has the advantages of low cost, high efficiency, safety to people and livestock, capable of preventing medicament resistance of the pests and the like, and is an effective novel means of preventing and controlling the acantholyda posticalis and very suitable for the population monitoring and entrapment prevention and control of the acantholyda posticalis.

The invention discloses a no-air-entrapped copper-boron nitride melt efficient stirring method and device, and belongs to the field of such material machining researches as metallurgy and casting. Copper-boron nitride metals are stirred by adopting a mode of combining a variable-volume graphite crucible with straight blades on the inner wall and high-speed electromagnetic stirring; the variable-volume graphite crucible is used for emptying all gas at the upper parts of melts; under the condition of totally isolating from external gas, a peripheral high-speed stirring motion is generated by using high-speed electromagnetic stirring; the straight blades on the inner wall of the graphite crucible are used for stopping upward floating and center gathering movement of boron nitride particles, so that no-air-entrapped copper-boron nitride melts with uniform boron nitride particles are obtained with high efficiency; the stirring time can be shortened to 2 minutes; and the technical problems of air entrapment and low stirring efficiency in copper-boron nitride melt stirring are solved.