51 results about "LESS THAN 2 MINUTES" patented technology

A temperature compensated crystal oscillation circuit adapted to be contained within a small device package and providing an output frequency accuracy of approximately +/-2 ppm over a temperature range or less than 2 minutes per year over the temperature range. The device includes crystal and a single integrated circuit wherein the integrated circuit has a temperature sensing circuit with a digital output, control circuitry, a memory circuit and a switched capacitor array for compensating the oscillation of the crystal oscillator over temperature.

A temperature compensated crystal oscillation circuit adapted to be contained within a small device package and providing an output frequency accuracy of approximately +/-2 ppm over a temperature range or less than 2 minutes per year over the temperature range. The device includes crystal and a single integrated circuit wherein the integrated circuit has a temperature sensing circuit with a digital output, control circuitry, a memory circuit and a switched capacitor array for compensating the oscillation of the crystal oscillator over temperature.

^99mTc-labeled triphenylphosphonium contrasting agents that target the mitochondria and are useful for early detection of breast tumors using scintimammographic imaging. ^99mTc-Mito₁₀-MAG3 possesses advantageous radiopharmaceutical properties. The uptake in the myocardium is reduced by one to two orders of magnitude compared to ^99mTc-MIBI. ^99mTc-Mito₁₀-MAG3 exhibits fast blood clearance, with a blood half-life of less than 2 minutes in rats. A diminished myocardial uptake combined with a prompt reduction of cardiovascular blood pool signal to facilitate improved signal-to-background ratios.

The invention discloses an electronic device housing comprising a housing body and a reinforcement piece. The reinforcement piece is fixedly arranged on the internal surface of the bottom wall of the housing body in an plying-up mode. The hardness of materials of the reinforcement piece is greater than the hardness of materials of the housing body. According to the invention, the intensity of the electronic device housing is substantially raised, so that components such as a liquid crystal screen inside the housing body can be effectively protected. Furthermore, the housing body has the relatively thinner bottom wall, and the cost is low. Furthermore, the invention also provides a manufacturing method for the electronic device housing, after the injection moulding of the housing body, one reinforcement piece, of which the hardness is greater than the hardness of materials of the housing body, is pasted to the inner surface of the bottom wall of the housing body, and pressure is applied to the reinforcement piece at the temperature of 120-160 degrees, and is subjected to vacuum heat preservation for no less than two minutes, so that the bonding intensity of the reinforcement sheet is raised and the reinforcement sheet will not easily fall off. On the above basis, the invention also provides an electronic device with the housing.

The invention relates to a thermal compression bonding method of polymer micro-liquid system. First, cleaning the surface of a polymer with micro structure and the surface of another polymer without micro structure and keeping them dry, which is characterized in that adding the monomer or homologue of said polymer into the surface of polymer without said micro structure, while the added amount is 10-40% of the weight of added polymer surface, and the adding depth is 0.1-10 micrometers; arranging said two surfaces face-to-face between two plates and adding the pressure of 0.5-5MPa to be heated in the temperature which is lower 5-20Deg. C than the vitrification temperature of said polymer for 2 minutes; removing pressure to be cooled slowly to room temperature to attain bonded polymer micro-liquid system. The adding method can select steam method, rotary plating method or dipping method. The invention can reduce the vitrification temperature of polymer surface, solve the bonding strength problem, and improve the bonding efficiency via adding polymer monomer or homologue, while it has simple process and the application to the bonding of polymer micro structures with different surface flatness.

The invention relates to an application of a compound type D-class dry powder extinguishing agent in a fire disaster of lithium metal and a derivative thereof. An extinguishing test is carried out according to a test model, test steps and test requirements which are required by a GA979-2012 D-class dry powder extinguishing agent, and the extinguishing success ratio is 100%; the following parameters are inspected after spraying of the compound type D-class dry powder extinguishing agent is finished: the extinguishing time is less than 2 minutes, the extinguishing efficiency is less than 24 Kg/m<2>, and the temperature of the surfaces of the extinguished lithium metal and derivative thereof is measured to be reduced below 50 DEG C; after the spray is finished for one hour, reacted residues left after burning of the lithium metal and derivative thereof can not burn again by being overturned and stirred, so that the extinguishment can be confirmed to be successfully applied.

The invention relates to a preparation method of a fast-respondability Hg2+developing fluorescence probe based on a rhodamine B-thiophene derivative. The preparation method comprises the steps of performing a condensation acylation reaction by using rhodamine B and DETA (diethylenetriamine), so as to obtain the rhodamine B-DETA derivative, then reacting the rhodamine B-DETA derivative with 2-thiophenecarboxaldehyde, so as to obtain the rhodamine B-thiophene derivative, and a water-ethyl alcohol mixing solution based on the rhodamine B-thiophene derivative can be used for the fast-respondability Hg2+developing fluorescence probe. The preparation method provided by the invention can be used for the fast-respondability developing fluorescence probe for rapidly analyzing the content of Hg2+ in a water sample, and the fast-respondability developing fluorescence probe has strong anti-interference to other metal ions (Na+, K+, Mg2+, Fe3+, Cu2+, Cr3+), the applicable pH value range is from acid to neutral, and the fast-respondability developing fluorescence probe is an ideal Hg2+developing fluorescence probe; the respond time of an Hg2+ color indicator to the Hg2+ is less than 2 minutes, the lowest detectable limit is 2.0 times 10<-7> mol/L; the preparation method provided by the invention has the advantages of being simple in synthetic process, low in cost, easy and simple to operate, high in sensitivity, quick in respond speed, low in detectable limit, wide in application prospect and the like.

The invention provides an extrusion preparation method of titanium alloy thin-wall sections. A anti-rust titanium alloy comprises TC4 titanium alloy phi 710 mm ingot casting is smelted, the ingot casting is forged to phi 220*L mm bar billet, an extrusion container, an extrusion film and an extrusion mat are conducted to preheat, preheat temperature is at 300-500 DEG C, and extrusion tools are conducted to smearing and lubrication process; the bar billet is shifted to the extrusion container quickly, shift time is less than 2 minutes, and extrusion speed is 120-300 mm/S; and titanium alloy sections are produced. According to the extrusion preparation method of the titanium alloy thin-wall sections, the extrusion of thin-wall small cross section on the large tonnage extrusion machine is achieved, meanwhile, costs of mode, labor and device operation are reduced greatly; compared with a traditional process, adding process or special treatment process is not needed, operability is strong and extrusion of present all cross sectional titanium alloy sections can be achieved.

The invention provides a digital TV channel searching method, comprising the steps of preparing environment and state variables, judging whether scanning in the whole frequency range is completed, setting the frequency points of a tuner, checking whether the AFC window entering and locking conditions meet the locking criteria, checking the locking condition of a video decoder, storing the channel position information, determining the jump and step length of the tuner and refreshing screen menu state display, etc. By using the method to search the channels, channel searching in the whole frequency band is completed within 2min, without omitting channels, and the number of the false channels is less than that of the like products.

Rapidly dispersing solid dry therapeutic dosage form comprised of a water insoluble compound existing as a nanometer or micrometer particulate solid which is surface stabilized by the presence of at least one phospholipid, the particulate solid being dispersed throughout a bulking matrix. When the dosage form is introduced into an aqueous environment the bulking matrix is substantially completely dissolves within less than 2 minutes thereby releasing the water insoluble particulate solid in an unaggregated and/or unagglomerated state. The matrix is composed of a water insoluble substance or therapeutically useful water insoluble or poorly water soluble compound, a phospholipid and optionally also at least one non-ionic, anionic, cationic, or amphipathic surfactant, together with a matrix or bulking agent and if needed a release agent. The volume weighted mean particle size of the water insoluble particle is 5 micrometers or less.

The invention relates to a cleaning method of cordyceps sinensis, belonging to the technical field of traditional Chinese medicine and aiming to solving the technical problem of reducing the loss of effective components of the cordyceps sinensis in the cleaning process and reducing the deformation and the contraction of the cordyceps sinensis. The cleaning method of the cordyceps sinensis is characterized in that time every part of the cordyceps sinensis contacts water is less than 2 minutes during cleaning; and the cleaned cordyceps sinensis has clear lines and bright color without residual silt when observed under a microscope (40 meshes). The cordyceps sinensis cleaned by the method has the loss rate of the effective components kept below 8 percent and the contraction rate below 12 percent.

The invention discloses a method for preparing a low-adhesion super-hydrophobic surface on a steel substrate. The method is characterized by comprising the following steps of: polishing and grinding a steel plate; cleaning and deoiling and then soaking in copper sulfate aqueous solution for not less than 20 seconds to uniformly deposit a copper layer on the surface; soaking the steel plate deposited with copper in fluorosilane-containing silver nitrate aqueous solution for not less than 2 minutes to uniformly deposit a fluorosilane-containing silver layer; taking out and washing with water; and drying to obtain the low-adhesion super-hydrophobic surface. The steel surface obtained by using the method has extremely high hydrophobicity and adhesion resistance, and the contact angle for water drops on the steel surface is 163.4 degrees and the rolling angle is only 1.5 degrees. According to the method, no dangerous chemical reagent or complex expensive equipment is required, the process is simple, and the repeatability is good.

A method for smelting titanium aluminum alloy belongs to the manufacturing method of titanium aluminum base alloy, solves the problems of element residual, hot crack and segregation of a melting method in the prior art, and improves the liquidity of a titanium aluminum base alloy melt. According to the invention, hydrogen is introduced in the smelting process of the titanium aluminum base alloy to obtain the casting titanium aluminum base alloy melt; and the partial pressure of introduced hydrogen is not less than 5kPa, and action time of hydrogen with the titanium aluminum base alloy melt is not less than 2 min. The invention has the advantages of simple process, low energy consumption, low cost, and easiness for implement in production, effectively improves the liquidity of the titanium aluminum base alloy melt during casting, and is not only applicable to common consumable arc melting and cold crucible induction melting, but also applicable to most casting methods, such as fusible pattern casting, metal mold casting and centrifugation casting.

The invention relates to the field of brewing, and in particular to a brewing pre-processing process of distilled liquor. The brewing raw material consists of the following components in parts by weight: 40 to 50 parts of sorghum, 15 to 25 parts of corn and 30 to 40 parts of paddy. The pre-processing process of the brewing raw material comprises the following steps of adding water which is equivalent to 1 to 3 times that of the volume of the raw material, soaking for at least two hours, and performing steam explosion pre-processing to obtain a steam explosion pre-processed material, wherein the pressure of steam explosion pre-processing is not less than 1.0MPa, and the time of steam explosion pre-processing is not less than 2 minutes. By adopting the raw material, the brewed distilled liquor tastes mellow and is pleasant in smell; after the pre-processing process is adopted, the transformation rate is improved by 20 percent, and the dreg can be used in cellulose extraction or fermentation.

The invention relates to a method for removing nitrosamine precursors in water by regulating pH and enhancing ion exchange, belonging to the technical field of water treatment. The invention is characterized in that the method uses a sodium-type strongly-acidic cation exchange resin to remove the nitrosamine precursors; and if the hydrogen-type strongly-acidic cation exchange resin should be converted into sodium type before use. Water to be treated is filled into an ion-exchange column, wherein the filtering velocity is 20-60 m/hour, the resin filling height is more than 1M, and the empty bed contact time is not less than 2 minutes. An acidic reagent is added into the influent water to lower the pH value to less than 7, thereby further enhancing the removal effect of the nitrosamine precursors. The hardness of the influent water and the hardness of the effluent water of the ion-exchange column are tested periodically; and the resin should be regenerated when the hardness of the effluent water greatly increases and is even identical to that of the influent water. A sodium chloride saturated solution is used in the regeneration process. The method for removing nitrosamine precursors in water by combination of pH regulation and ion exchange can effectively control the generation of nitrosamine in the water; the equipment is simple to operate and convenient for water plants to use; and the method is also applicable to domestic water purifiers.