84results about How to "Avoid charring" patented technology

An ablation electrode assembly is provided with improved irrigation cooling of the assembly and ablation site. The assembly includes a proximal end configured to be coupled to a catheter shaft and a distal end configured to deliver ablation energy to tissue. The assembly further includes a fluid manifold extending from the proximal end to the distal end and configured to fluidly communicate with a fluid lumen in the catheter shaft. The fluid manifold defines an axial passageway centered about a longitudinal axis extending in the longitudinal direction of the assembly. The axial passageway has a distal end terminating prior to the distal end of the electrode assembly. The assembly further includes means for creating turbulence in fluid exiting the first axial passageway.

The invention discloses a method for cutting a golden finger of a flexible circuit board by ultraviolet laser. Ultraviolet pulse laser with 16-29j / cm2 of low-energy density and 60-90kHz of high repetition frequency is adopted to cut and process PI (polyimide) substrate at 100-400mm / s scanning speed, then ultraviolet pulse laser with 113-226j / cm2 of high-energy density and 20-30kHz of low repetition frequency is adopted to cut and process copper foil material at 50-200mm / s scanning speed, and the ultraviolet pulse laser is closed when no copper foil material exists, until the copper foil material is penetrated in a cutting manner, so as to carry out FPC (flexible circuit board) golden finger cutting and processing procedures. In the method, the method that the ultraviolet pulse laser with high-energy density and low repetition frequency only cuts the copper foil material and the method that the ultraviolet pulse laser with low-energy density and high repetition frequency only cuts the PI substrate are combined to cut the substrate of the FPC, so that heat damage, carbonization and chippings at the cutting edge of PI can be effectively avoided, the cutting quality of the golden finger is improved and the problems in the prior art are solved.

The invention discloses a method for determining the dissolved quantity of lignin. The method comprises the following steps: 1) weighing lignin A with the mass of M, dissolving the lignin into 1.28g / ml-1.34g / ml sulfuric acid with the volume of V, stirring for 2h, and standing for 24h; 2) conducting suction-filtration on the solution in the step 1, collecting filtrate and filter residues, and determining the absorbance of the filtrate as A1 by utilizing a spectrophotometer; 3) washing the filter residues in the step 2 for at least three times with pure water, placing the cleaned filter residues together with a hopper with mass of m1 into a 100DEG C drying oven and drying for more than 8h, and weighing the total mass of the filter residues and the hopper as m2; 4) calculating the mass M1(equal to m2 minus m1) of lignin A insoluble to acid, so that the mass M2 of the lignin A soluble to sulfuric acid is equal to M minus M1, and the concentration C1 of lignin A soluble to acid is equal to M2 / V; and 5) weighing the lignin B with the mass of M and dissolving into sulfuric acid with the volume of V, repeating operations of the steps 1 and 2, and recording the absorbance of the solution as A2, so that the concentration C2 of lignin B soluble to acid is equal to (A2 / A1)*C1, and the dissolved quantity M3 of the lignin B in the sulfuric acid with the volume of V is equal to C2*V.

The invention belongs to the technical field of refined cotton production, and particularly relates to a production method of refined cotton; the invention can not only improve the quality of refined cotton products, but also reduce water and steam consumption, and can reduce acid water discharge. The method particularly comprises the following steps of: 1) boiling of cotton linter; 2) washing, wherein nitrocellulose acidic waste water is used for washing, and washing is performed till the pH of the cotton material is 6.5-7.5; 3) bleaching, wherein a sodium hypochlorite solution is used for bleaching; 4) acidification, wherein nitrocellulose acidic waste water is added during acidification to control the pH to be 1-5; 5) cold washing, wherein cold washing is performed with water. The nitrocellulose acidic waste water has a total acidity of 5-15 g / l, and comprises the following main components by weight: 0.003%-0.023% of sulfuric acid, 0.006%-0.018% of nitric acid, and the balance of water and impurities. The beneficial effect of the invention is that nitrocellulose acid water needing to be discharged is used to substitute concentrated sulfuric acid during the refined cotton production process, which avoids the carbonization of refined cotton by concentrated sulfuric acid, improves the quality of refined cotton, reduces water and consumption, reduces the discharge of nitrocellulose acid water, and saves the cost for nitrocellulose acid water treatment.

The invention discloses a method for treating and processing plant straws, and comprises the steps of removing impurities in the plant straws by using dust removing equipment; pulverizing the plant straws free of impurities into powder feed of 1-5mm by using a pulverizer; adding sodium carboxymethyl cellulose (0.1%-2.0% of the plant straw by weight) to the powder feed; blending; feeding the blended mixture into a turgor machine for hydrolytic treatment with reaction time of 10s -60s at the temperature of 100 DEG C- 200 DEG C; and fabricating granular, strip-shaped and flake-like products after the treated mixture sprays momentarily. The products can be used as paper making raw ingredients or livestock feed. The method is environment-friendly, and can convert the plant straws into oligosaccharides with conversion rate of 98%, thereby being favorable to digestive absorption by poultry of livestock.

The single needle water cooling type RF ablation electrode has support frame inside handle matching and inserting into the water storing frame, middle cavity to form cooling water return pool, electrode needle with insulating material coated and scaled front section, bare tip and back section inserted inside the handle and connected to RF wire, built-in water guiding steel pipe, and temperature metering thermocouple inserted into the electrode needle in the coaxial position. The water inlet hose is connected to the built-in water guide steel pipe, water outlet hose connected to the cooling water return pool, and the RF wire and the thermocouple constitute the connecting cable connected to the system unit of the RF ablation system for signal transmission. The cooling water circulates in the system. The present invention has novel structure, great and controllable ablation range and high safety and reliability.