249results about How to "Improve quenching efficiency" patented technology

The present invention is directed to novel fluorinated dye stabilizers having both high quenching efficiency and solubility in halogenated solvents. These dye stabilizers have shown a significantly effect on improving the dye fastness in hostile photooxidation conditions.

The invention provides nucleic acid monomers with a 2′-modification that are useful for the incorporation of dyes or blocking groups. The monomers can be incorporated on the 3′-end of a dual labeled probe to inhibit PCR polymerase extension during PCR. The polymerase is inhibited from extending the probe at the 3′-hydroxyl group when the monomer is present; there is no need to add a chemical moiety to the 3′-hydroxyl or remove the 3′-hydroxyl. The monomers can also be incorporated internally or at the 5′-end of the oligonucleotide. A detectable label, such as a fluorescent or quenching dye, can be incorporated on the 2′-position of such monomers.

The invention discloses a rotating disc type automatic quenching device, and belongs to the technical field of heat treatment equipment. The rotating disc type automatic quenching device comprises a rotating disc. The rotating disc is driven by a driving device and is horizontally arranged. At least three slipways are uniformly distributed on the rotating disc and around the central axis of the rotating disc. Pushing rods capable of sliding up and down along the slipways are arranged in the slipways. A quenching induction coil and a cooling pipe orifice are sequentially arranged on the rotating disc in the rotating direction of the rotating disc, are arranged on the movement loci of the pushing rods and are respectively opposite to the two adjacent pushing rods. A motor, driven by a pneumatic cylinder II to move up and down, is arranged below the rotating disc and at a corresponding position of the quenching induction coil. A quick connecting device for transmitting torque is arranged at the upper end of an output shaft of the motor and the lower ends of the pushing rods. Heating, cooling and taking and placing of parts are conducted synchronously and do not affect one another, the quenching efficiency is improved greatly, and besides, quenching parts uninterruptedly rotate at constant speed in the quenching induction coil along with the pushing rods, and are guaranteed to be heated more uniformly.

A composition comprising an oligonucleotide having the structure 5′-Y₁-L₁-X-L₂-Y₂-3′. Y₁ comprises a sequence of one or more DNA or RNA nucleotides, including a first nucleotide N₁ having a 3′ phosphate covalently linked to L₁. Y₂ comprises a sequence of one or more DNA or RNA nucleotides, including a second nucleotide N₂ having a 5′ phosphate covalently linked to L₂. L₁ and L₂ each independently are a direct bond or a C₁-C₇ alkyl, alkynyl, alkenyl, heteroalkyl, substituted alkyl, aryl, heteroaryl, substituted aryl, cycloalkyl, alkylaryl, or alkoxyl group. X is

R₁ is a hydrogen or a C₁-C₈ alkyl. M is a label or ligand comprising a fused polycyclic aromatic moiety.

Disclosed is a high-strength bolt having a tensile strength of 1,200 N/mm² or more and superior in delayed fracture resistance and relaxation resistance, prepared by wire-drawing a bolt steel containing the following elements: C: 0.5 to 1.0% (mass %, the same shall apply hereinafter), Si: 0.55 to 3%, Mn: 0.2 to 2%, P: 0.03% or less (but not 0%), S: 0.03% or less (but not 0%), and Al: 0.3% or less (but not 0%), and containing proeutectoid ferrite, proeutectoid cementite, bainite and martensite at a total areal rate of less than 20% and pearlite in balance; cold-heading the wire into a bolt shape; and then bluing the bolt in a temperature range of 100 to 500° C.

The invention discloses a fluorescent sensing polymer material for detecting nitryl explosives and a preparation method. The preparation method of the material comprises the following steps: taking 2,5- dibromo thiophene, poly(phenyleneethynylene) polymer and 2,7-dibromo-9,9-diphenylfluorene as raw materials; and polymerizing to obtain the fluorescent sensing polymer material. 9,9-Diphenylfluorene and thiophene monomer are introduced to synthesize the poly(fluorenyleneethynylene) polymer (PFEs). The 9,9-diphenylfluorene unit is introduced in the poly(phenyleneethynylene) polymer to weaken Pi-Pi stacking between skeletons, permeability of the polymer is improved, the polymer has rigid steric hindrance, meanwhile, the thiophene unit is introduced to enable the polymer to be rich in electrons, and an electron transfer function of the electrons between the nitro-aromatic compounds and the sensor is promoted.

The invention discloses a water soluble fluorescent conjugated polymer and a synthesis method thereof. The polymer has a conjugated main chain with hydrophobicity and ionic type functional group sidechains with hydrophilicity, wherein the ionic type functional group side chains with hydrophilicity are sulfonate and nitrobenzene; and the conjugated main chain introduces a single pyridine functional group. The invention introduces the single pyridine functional group at the conjugated main chain, thus being beneficial to aggregation of polymers, forming a three-dimensional structure and effectively improving the rigidity of the conjugated main chain; in addition, a pyridine ring can form complex with most of metallic ions so as to lead the polymeric molecule to have better quenching efficiency; further, the invention combines excellent optical performance of the conjugated polymer and water solubility of polyelectrolyte and provides a platform for designing a high-efficiency fluorescentprobe.

The invention belongs to the technical field of chemical sensing, and particularly relates to a new fluorescence detection method of tetracycline based on a zirconium-based MOF(Metal-Organic framework). By using the zirconium-based metal-organic framework (Zr-MOF) with good water and heat stability and excellent luminescent performance as a detection platform, selective adsorption enrichment and fluorescent response of the Zr-MOF on the tetracycline in a water body are utilized, so that high-sensitivity and high-selectivity detection on the tetracycline can be realized. Meanwhile, the detection method has a low detection limit. Compared with other detection methods of the tetracycline, the detection method disclosed by the invention has the advantages of simple and quick operation, no need of expensive and complicated instruments and equipment, and the like; therefore, the practicability is high, and the application range is wide. The fluorescent response of the zirconium-based MOF on the tetracycline is based on electron transfer between the zirconium-based MOF and the tetracycline, and fluorescence quenching on the zirconium-based MOF is caused by photoinduced electron transfer between the zirconium-based MOF and the tetracycline.

The surface hardening treatment process for piston rod of great power low speed diesel engine includes continuous surface heating to 900-940 deg.c in an intermediate frequency inducing heater of the quenching apparatus, quenching through spraying water, tempering through heating to 200-270 deg.c, and rotating the piston rod while heating in the inducing heater and spraying water. The present invention has high quenching efficiency, environment friendship, homogeneous heating and quenching, and capacity of reaching required surface hardness, quench hardened layer depth and micro structure.

This invention relates to an art for oil-quenching high-chromium alloy cast ball. The high-chromium alloy cast ball and cast-section are heated to quenching temp., then tapped out of the furnace, proceeding oil-quenching, oil temp. being controlled <120 deg.C, when temp. of the product being lowered below 300 deg.C, the cast ball and cast section are taking out of the oil-cell. The wear-resisting high-chromium cast ball and cast section treated by using this method are better than that of prior art treatment in various kinds of technical index, wherein: quenching hardness=60-65 deg.C, difference (between center and surface) of hardness <2.0 RHc, ball falling test >3000 times. This quenching art overcomes prior art defect. The product treated by this method has excellent wear-resisting property and longer service-life.

The invention relates to the field of gear machining, in particular to high-frequency gear quenching equipment. The high-frequency gear quenching equipment comprises a conveying mechanism, and gear parts for being arranged in order to be quenched. The gear parts are fed one by one, a first carrying mechanism is used for receiving and grabbing the gear parts from the conveying mechanism and is usedfor transferring the gear parts, and a high-frequency quenching mechanism is used for receiving the gear parts conveyed by the first carrying mechanism and carrying out high-frequency induction heating and quenching on the gear parts. A second carrying mechanism is used for receiving and grabbing the gear parts quenched by the high-frequency quenching mechanism and is used for transferring the gear parts, and an air cooling mechanism is used for receiving the gear parts conveyed by the second carrying mechanism and cooling the gear parts. An oil smearing mechanism is used for receiving the gear parts conveyed by the second carrying mechanism and smearing the surfaces of the gear parts with oil. According to the high-frequency gear quenching equipment, assemble line work is carried out, the gear parts can be automatically settled, conveyed and placed, manual taking and placing are replaced, high safety is achieved, and the production efficiency is improved.

The invention relates to an electrochemiluminescence sensor for detecting insulin by quenching a CdS hybridized TiO2 nanoribbon through gold-curcumin nanoparticles. According to the present invention,the potassium persulfate and the hydrogen peroxide are used as the co-reactants together, so that the electrochemiluminescence property of the CdS hybridized TiO2 nanoribbon is enhanced. In order tosensitively detect the insulin, the invention designs a sandwich type quenching type electrochemiluminescence immunosensor, and the gold-curcumin composite ZIF-8 is adopted as a quenching agent, so that the electrochemiluminescence intensity of the CdS hybrid TiO2 nanoribbon is reduced. The quenching mechanism is mainly that the curcumin consumes the hydroxyl radicals generated in an electrochemical reaction process, and the luminous intensity of the luminescent material is further reduced through energy transfer, so that the dual quenching of an electrochemiluminescence signal is realized; the insulin with different concentrations can be combined with different amounts of secondary antibody marker gold-curcumin composite ZIF-8, so that the electrochemiluminescence intensity change of thesensor is different. The linear range of insulin detection is 0.3 pg/mL-20 ng/mL, and the detection limit is 0.09 pg/mL.

The invention discloses a safe and efficient quenching device for workpieces. The safe and efficient quenching device comprises a guide wheel, a box body, a vibration exciter, a cooler, a box body, aliquid drainage tube, a thermometer, a timer, a bottom plate, a spring, a solvent adding tube, a liquid level meter, a fan, a mesh basket and a condensing chamber, wherein the guide wheel is arrangedon the bottom surface of the box body; the cooler is arranged on the inner wall of the box body; the side wall of the upper end of the box body is equipped with the solvent adding tube and the liquidlevel meter; the mesh basket is arranged in the box body; a telescopic pole is arranged on the mesh basket; the top end of the telescopic pole is connected with the side wall of the top end of the boxbody through a hanger; the lower surface of the mesh basket is fixedly equipped with the vibration exciter; the bottom plate is arranged in the mesh basket; the bottom plate is connected with the bottom end inside the mesh basket through the spring; the fan is arranged on the inner wall of the upper part of the box body; a camera is arranged on the inner wall of the box body; and the condensing chamber communicates with the top end of the box body through a gas conveying tube. The safe and efficient quenching device guarantees accuracy of a casting process, avoids resource waste, quickly clears water mists, guarantees safety, improves working efficiency, is simple in structure, is convenient to use, and is beneficial for popularization.

An inner-diameter quenching device is provided with a workpiece holding assembly for holding a workpiece to be quenched, a spray cylinder, and a heating coil. The workpiece has a central axis. The spray cylinder is disposed at a first side of the workpiece holding assembly and driven by a lifting assembly to move along the central axis into an inner diameter of the workpiece. The heating coil is disposed at a second side of the workpiece holding assembly and located on and movable along the central axis. The heating coil and the spray cylinder are separated and movable in opposite directions along the same center axis, which can further reduce the size of the quenching device, making it suitable for quenching a small inner-diameter workpiece. Besides, the spray apertures are inclined, so that the cooling liquid can be sprayed out more easily to enhance the quenching effect.

The invention provides an atomization gas quenching device, comprising a quenching box body which is provided with a cover at the top and is internally provided with an internal cylinder with holes, current collectors and carrier netting pieces are fixed in the internal cylinder at interval by supporting rods; the atomization gas quenching device is characterized in that: the atomization gas quenching device comprises an atomization box which is connected with the quenching box, the atomization box comprises an outer box body which is provided with a gas inlet and a liquid outlet, and an inner cylinder which is arranged in the outer box body and is provided with holes on the wall and is internally provided with a cavity, the liquid inlet on the box body is extended in the inner cylinder, and a nozzle is arranged on the inner end opening; the liquid medium for quenching is atomized in the atomization box through the nozzle and then is mixed with the gas, and then the atomized gas and the liquid mixed medium are provided to the quenching box, so as to improve the quenching efficiency, ensure the quenching quality and eliminate the defects on the surface of the parts; the structure is simple, the usage is convenient, the atomization effect is good, the ingredients are uniform, and the water and gas feeding can be controlled respectively, and the content ratio of the atomization composition ca be easily adjusted, so as to meet the atomization requirements of different workpieces.

The invention discloses a drum device for online continuous quenching of inclined rolled steel balls. The drum device comprises a water tank, a variable frequency control motor, a speed reducer, a chain wheel mechanism, a ball inlet chute, a conical ball inlet drum, a columnar quenching drum, a conical ball outlet drum, a ball outlet chute, a chute bracket, a bearing base, a rotating shaft and a four-jaw spoke; the conical ball inlet drum is used for smoothly leading large-diameter steel balls, introduced by the ball inlet chute, into the columnar quenching drum; the columnar quenching drum is used for realizing spiral feeding and quenching functions of the steel balls; and the conical ball outlet drum is driven by the rotating shaft to rotate to realize the purposes of fishing the quenched steel balls and pouring the steel balls in the ball outlet chute. The drum device has the following beneficial effects: for the steel balls, with diameters of 50-65 mm, molded through high-temperature inclined rolling, the online continuous quenching is performed, so that the energy is saved, the quenching time is precisely controlled, and the quality of the steel balls is improved; and the drum device is high in quenching efficiency, stable in process, low in noise and high in automation degree, and can satisfy the large-batch continuous quenching requirement of the steel balls.

The invention discloses a quenching system and method for box-type workpieces, and belongs to the technical field of heat-treatment quenching equipment. According to the quenching system and method for the box-type workpieces, the quenching system comprises a quenching pool body, a stirring system and a hoisting system capable of hoisting the workpieces back and forth. Stirring devices are symmetrically mounted on the two sides of the interior of the quenching pool body from above. A guide device is arranged between the stirring devices and comprises a plurality of layers of guide plates whichare distributed symmetrically, and a liquid flow in a quenching pool is controlled by means of the thrust of propeller blades in the stirring system and quenching liquid channels formed between the multiple layers of guide plates. A circulating and cooling system is connected to the outside of the quenching pool. When the temperature of a quenching medium is higher than an upper limit of the optimal service temperature, the circulating and cooling system is started to realize circulation and cooling of the quenching liquid.