Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
214 results about "Specific rotation" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
In chemistry, specific rotation ([α]) is a property of a chiral chemical compound. It is defined as the change in orientation of monochromatic plane-polarized light, per unit distance–concentration product, as the light passes through a sample of a compound in solution. Compounds which rotate the plane of polarization of a beam of plane polarized light clockwise are said to be dextrorotary, and correspond with positive specific rotation values, while compounds which rotate the plane of polarization of plane polarized light counterclockwise are said to be levorotary, and correspond with negative values. If a compound is able to rotate the plane of polarization of plane-polarized light, it is said to be “optically active”.
Variable valve timing control apparatus for internal combustion engine
ActiveUS20100269772A1Rapidly and smoothly accomplishedAvoid lostValve arrangementsMachines/enginesVariable valve timingEngineering
Owner:DENSO CORP
Off-line feed rate scheduling for reduction of machining time and enhancement of machining accuracy in CNC machining
InactiveUS20050113963A1Improve machining precisionIncrease productivityComputation using non-denominational number representationNumerical controlMachined surfaceSpecific rotation
An off-line feed rate scheduling method of a CNC machining process includes selecting a constraint variable and inputting a reference value related to the constraint variable; estimating a cutting configuration where a maximum constraint variable value (CVV) occurs through ME Z-map modeling; receiving the estimated cutting configuration and estimating a specific rotation angle (φs) where the maximum constraint variable value occurs through constraint variable modeling; calculating a feed rate that satisfies the reference value of the constraint variable at the estimated specific rotation angle; and applying the calculated feed rate to the NC code. Cutting force or machined surface error may be selected as a constraint variable depending on machining conditions.
Owner:POSTECH ACAD IND FOUND
Rotating Electric Machine and Electric Vehicle
ActiveUS20110254474A1Improve efficiencyImprove performanceAC motor controlDC motor speed/torque controlElectric machineStator coil
A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.
Owner:HITACHI ASTEMO LTD
Peach gum polysaccharide, its extractive, preparation method and application thereof
ActiveCN102372789AMeet the use requirementsAvoid decompositionCosmetic preparationsToilet preparationsNatural stateSpecific rotation
The invention discloses a peach gum polysaccharide, comprising 70-98 wt% of neutral total sugar and no nucileic acid, protein, tannin, dextrin, starch and other impurities, wherein, the content of glucuronic acid in the neutral total sugar accounts for 5-30 % of the content of the peach gum polysaccharide, the average molecular weight of the peach gum polysaccharide is more than 3000 dalton, and an aqueous solution of the peach gum polysaccharide has a dynmaic viscosity of 0.5-4.0 pa. s, a pH value of 4.0-6.5, and a specific rotation defined in the description. The invention also provides an extractive of the peach gum polysaccharide, and a preparation method of the peach gum polysaccharide and the extractive, and an application as a stabilizing agent. The preparation method of the peach gum polysaccharide and the extractive can ensure that various physicochemical properties of the peach gum polysaccharide satisfy the requirements of use in food, medicines, cosmetics, and light industry field, keeps natural state of the peach gum polysaccharide, has no effluence on the product properties of the peach gum polysaccharide, ensures the safety, stability, validity and controllability of the product, and has a wide commercial prospect and application future.
Owner:SHANGHAI HUIWEN BIO TECH
Off-line feed rate scheduling for reduction of machining time and enhancement of machining accuracy in CNC machining
InactiveUS7050883B2Improve precisionIncrease productivityComputation using non-denominational number representationNumerical controlMachined surfaceEngineering
An off-line feed rate scheduling method of a CNC machining process includes selecting a constraint variable and inputting a reference value related to the constraint variable; estimating a cutting configuration where a maximum constraint variable value (CVV) occurs through ME Z-map modeling; receiving the estimated cutting configuration and estimating a specific rotation angle (φs) where the maximum constraint variable value occurs through constraint variable modeling; calculating a feed rate that satisfies the reference value of the constraint variable at the estimated specific rotation angle; and applying the calculated feed rate to the NC code. Cutting force or machined surface error may be selected as a constraint variable depending on machining conditions.
Owner:POSTECH ACAD IND FOUND
Preparation of mitiglinide calcium and its quality control method
InactiveCN1844096AImprove accuracyHigh sensitivityOrganic active ingredientsOrganic chemistryPropanoic acidMalonate
The invention relates to a preparation and quality control method of Mitiglinide Calcium comprising steps: 1,synthesis of cis- cyclohexyl-1,2-dimethylacid imide; 2,synthesis of cis-hexa-hydrogen isoindole; 3,synthesis of alpha-benzyldiethyl malonate; 4,synthesis of benzylsuccinic acid; 5,S- benzylsuccinic acid methylbenzylamine salt; 6,synthesis of s- benzylsuccinic acid; 7,synthesis of (2S)-2- benzyl-3-(cis-hexa-hydrogen isoindole-2- carbonyl) propanoic acid; 8,synthesis of Mitiglinide Calcium; 9,purity of Mitiglinide Calcium. This invention also contains the method for quality control of Mitiglinide Calcium comprising steps: watching deseription, messureing specific rotation, authenticating, checking, content messureing for Mitiglinide Calcium.
Owner:天津汉康医药生物技术有限公司
Control apparatus for hybrid vehicle
InactiveUS20090018715A1Maintaining drive performanceImprove quietnessHybrid vehiclesDigital data processing detailsDrive wheelSpecific rotation
In one embodiment, a first motor is used upon stopping or starting of an engine during driving of a vehicle. When a stop control or a start control of the engine is executed, a target drive force required to be generated by a second motor is calculated based on a drive force required for driving. A positive drive force required for elimination in a specific rotation direction of backlash occurring in mutual meshing sections of gears of a power distribution mechanism is added to the target drive force. Meanwhile, a braking force required of a brake in order to cancel the added positive drive force so as not to be transmitted to drive wheels is calculated. Based on the results of calculation, coordinated control is executed in which the second motor and the brake are operated in a linked manner.
Owner:TOYOTA JIDOSHA KK
Technological method for synthesizing optical pure L-/D-lactide by using biomass organic guanidine catalyst method
ActiveCN103193759ANo metalNon-cytotoxicOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsCreatinine riseDistillation
Owner:JINDAN BIOLOGICAL NEW MATERIAL CO LTD
Miter saw having digital display capable of displaying specific angle
A miter saw capable of displaying a specific rotation angle of a turntable and a specific tilting angle of a circular saw blade when the turntable is moved to a position within a predetermined specific rotation angle range and when the circular saw blade is moved to a position within a predetermined specific tilting angle range, respectively. Normally, a digital display displays the rotation angle at a rate of a predetermined display unit rotation angle which is an integral multiple of a predetermined unit rotation angle corresponding to a single pulse. However, if the turntable is moved to the position within the predetermined specific rotation angle range, the specific rotation angle which is not the integral multiple of the predetermined display unit rotation angle is displayed at the digital display. The same is true with respect to the tilting angle.
Owner:HITACHI KOKI CO LTD
Method for synthesizing L-menthol
InactiveCN101602651AWide variety of sourcesLow pricePreparation by isomerisationPreparation by hydrogenationIsomerizationOrganic synthesis
The invention belongs to the technical field of organic synthesis, in particular to a method for synthesizing L-menthol. The method for synthesizing L-menthol takes myrcene as an initial raw material and comprises the following steps: amination reaction: diethylamine and myrcene carry out amination reaction to obtain geranylamine; isomerization reaction: the geranylamine carries out isomerization reaction under the catalytic action of chiral catalyst to obtain intermediate enamine; hydrolysis reaction: the enamine carries out hydrolysis reaction in an acidic medium to produce intermediate D-citronellal; cyclization reaction: the D-citronellal generates L-isopulegol by lewis acid catalyst and organic solvent; and hydrogenation reaction: the L-isopulegol is hydrogenated to obtain L-menthol. The method for synthesizing L-menthol has the yield of more than 90 percent, the GC purity of higher than 99.0 percent and the specific rotation of -49 degrees to -50 degrees, the raw material myrcene has wide sources and lower cost, and the whole method has simple technology, good repeatability and high yield and is quite suitable for large-scale industrialized production.
Owner:SHANGHAI WANXIANG FLAVORS & FRAGRANCES
Method for preparing D-pantolactone by microbe mixed fermentation method
InactiveCN101392278AHigh optical purityMeet quality requirementsFungiMicroorganism based processesChemical synthesisMicroorganism
The invention relates to a method of D-pantolactone, in particular to a method taking chemically synthesized DL-pantolactone as a substrate for preparing the D-pantolactone by the mixed fermentation of microorganisms. The method adopts Aspergillus terrus DH-069-CGMCCNo.2498 and Rhizopus oryzae QY-022-CGMCCNo.2497 which are microbial flora for producing the hydrolase of the D-pantolactone as enzyme-producing strains for mixed fermentation. The method has the advantages that: the hydrolase of the D-pantolactone produced under the coordination of two strains is utilized to separate the DL-pantolactone, time for producing enzyme and fermentation is short (two days), enzymatic conversion time is also short (3 hours to 30 hours) and the enzyme can be reused for more than 8 times; one-time conversion rate of the enzyme is 38 percent to 56 percent; the total conversion of the substrate is 85 percent to 95 percent; the extraction yield of products is more than 60 percent; the major quality indexes of the D-pantolactone are as follows: specific rotation (Alpha)D<20> is minus 48 degrees to minus 51 degrees and optical purity is 99 percent e.e.
Owner:JINAN DAHUA GUANGJI FARMING DEV
Vehicle and control method of vehicle
ActiveUS7575078B2Increase rotation speedEasy to operateHybrid vehiclesDigital data processing detailsSpecific rotationControl theory
The control procedure of the invention sets a target rotation speed Ne* and a target torque Te* of an engine corresponding to a torque demand Td* required for driving the vehicle (steps S100 to S120). In response to an upshift request for a gear of a transmission, the control procedure sets a positive pre-upshift target rotation speed Nmtag to a target rotation speed Nm1* of a first motor (step S230). The control procedure changes the target rotation speed Ne* of the engine to a specific rotation speed corresponding to the pre-upshift target rotation speed Nmtag of the first motor (step S240) and subsequently implements an actual change of the gear in the transmission (step S310). This arrangement effectively restrains a battery from being overcharged with excess electric power.
Owner:TOYOTA JIDOSHA KK
Motor controller and electric power steering apparatus
InactiveUS7813089B2Suppresses a torque rippleSingle motor speed/torque controlElement comparisonElectric power steeringMotor controller
Owner:JTEKT CORP
Misfire determination device and misfire determination method for internal combustion engine
InactiveUS20100031736A1Avoid erroneous misfire determinationAvoid misfire determinationInternal-combustion engine testingMomentumEngineering
When a rotation fluctuation amount of an engine exceeds a predetermined threshold, it is determined that there is a possibility that a misfire has occurred. Then, when a rotation fluctuation pattern of the engine coincides with a first rotation fluctuation pattern, it is determined that a misfire has occurred; whereas, when the rotation fluctuation pattern does not coincide with the first rotation fluctuation pattern, it is determined whether the rotation fluctuation pattern coincides with a specific rotation fluctuation pattern in consideration of a lock-up state of a lock-up clutch or whether an engine rotational speed is lower than a threshold. When the determination is affirmative, occurrence of a misfire is determined on the basis of whether the rotation fluctuation pattern of the engine coincides with a second misfire determination pattern that is defined to be smaller in variation of a rotation fluctuation amount than the first rotation fluctuation pattern.
Owner:TOYOTA JIDOSHA KK
Automated assembly apparatus and method of assembling components by using automated assembly apparatus
InactiveUS20120324693A1Accurate detectionProgramme controlProgramme-controlled manipulatorRotational axisSpecific rotation
While a second component is brought into contact with a first component, the first component and the second component are rotated with respect to each other around a specific rotation axis, and rotation of the first component and the second component is stopped when a moment created around the rotation axis exceeds a predetermined threshold.
Owner:CANON KK
Vehicle permanent magnet synchronous motor rotary transformer zero calibration method and system
ActiveCN107894247ARealize measurementHigh measurement accuracyInstrumentsPermanent magnet synchronous motorEngineering
The invention provides a vehicle permanent magnet synchronous motor rotary transformer zero calibration method and system. The zero calibration method comprises the following steps of controlling a permanent magnet synchronous motor to operate according to the received given current vector amplitude and the given rotating speed value; after the permanent magnet synchronous motor stably operates atthe given rotating speed value, setting the inverter in a three-phase short circuit state, and recording a first included angle and a second included angle formed by a current vector at a specific rotation speed value and a d-axis negative half axis of a preset rotor coordinate system of the permanent magnet synchronous motor in the subsequent rotation speed reduction process, then calculating the average value of the first included angle and the second included angle, and obtaining the zero offset angle of the rotary transformer. The method has the beneficial effects that the rotation speedclosed-loop measurement is realized, the influences of the friction force, the cogging torque or other non-ideal factors to the zero calibration of the rotary transformer can be eliminated or suppressed, the measurement precision is high, and the calibration can be carried out under the condition that the calibrated motor is in a vehicle-mounted state.
Owner:GAC AION NEW ENERGY AUTOMOBILE CO LTD
Control apparatus for hybrid vehicle
InactiveCN101342905AImprove quietnessSuppresses or prevents rattling noiseHybrid vehiclesEngine controllersDrive wheelSpecific rotation
In one embodiment, a first motor is used upon stopping or starting of an engine during driving of a vehicle. When a stop control or a start control of the engine is executed, a target drive force required to be generated by a second motor is calculated based on a drive force required for driving. A positive drive force required for elimination in a specific rotation direction of backlash occurring in mutual meshing sections of gears of a power distribution mechanism is added to the target drive force. Meanwhile, a braking force required of a brake in order to cancel the added positive drive force so as not to be transmitted to drive wheels is calculated. Based on the results of calculation, coordinated control is executed in which the second motor and the brake are operated in a linked manner.
Owner:TOYOTA JIDOSHA KK
Preparation method of L-carnitine
ActiveCN102633664AReduce pollutionRaw materials are easy to getOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsSpecific rotationEthyl Chloride
The invention relates to a method for preparing L-carnitine by asymmetric catalytic hydrogenation reduction. Alkyl 4-chloroacetoacetate is used as a raw material, [RuCl(cymene)(S-BINAP)]Cl[chloro[(S)-(-)-2,2'-di(diphenylphosphine)-1,1'-binaphthyl](p-cymene)ruthenium chloride(II))] is used as a catalyst, and amination and hydrolysis reaction are carried out to obtain the L-carnitine product. The amination reaction does not need any solvent or virulent cyanide. The chemical purity of the L-carnitine product is higher than 97%, and the specific rotation [alpha]20D is -29 -32. The invention has the advantages of high reaction speed, stable catalytic system, low pressure required by the reaction process, high conversion rate, no need of solvent in the amination reaction, and is convenient to operate, thereby lowering the cost, reducing the environmental pollution and being convenient for large-scale production.
Owner:GUANGXI XINJING TECH +2
Process for preparing I-clopidogrel hydrogen sulfate
InactiveCN1690060AConvenient and stable preparationStable in natureOrganic chemistryCrystal systemInfrared
The invention relates to a method for producing sulfuric acid chlorogray of styleó±, containing the following steps: under the protection of inert gas and cooled with iced water, adding aqueous solution with sodium carbonate / potassium into organic solvent comprising chlorogray salt until the pH is higher than 9; and demixing the liquid, extracting the water layer with the same organic solvent, after combining with organic phase, drying and concentrating it to get free chlorogray alkali; then dissolving it in solvent, dropping in stoichiometric sulfate liquor, and the chlorogray formed, with the temperature controlled between minus 20 Deg.C to 5 Deg.C; then filtering the mixed solution, vacuum drying it, and then the sulfuric acid chlorogray of styleó±can be collected. The sulfuric acid chlorogray produced in such way is proved to beó±morph crystal system confirmed by X-ray diffraction, infrared spectrum and DSC spectrogram, and the fusible point is 181~186 Deg.C, and the specific rotation is 52.0í½55.0 deg. (c=1, carbinol). The method can produce sulfuric acid chlorogray of styleó±steadly.
Owner:上海开特生物科技有限公司
Motor controller and electric power steering apparatus
InactiveUS20080290829A1Suppresses a torque rippleElement comparisonFrequency analysisElectric power steeringControl signal
In a motor controller, if a failed electric current flow in any one of phases of a motor is detected, a motor control signal is generated, based on a phase other than the phase with the failed electric current flow, in such a manner that a motor electric current matches a required torque except for at a specific rotation angle corresponding to the phase with the failed electric current flow.
Owner:JTEKT CORP
Magnetic sucking climbing robot
ActiveCN109606495AStrong driving forceSimple mechanical structureVehiclesSteering wheelSpecific rotation
The invention discloses a magnetic sucking climbing robot which comprises magnetic wheels, a driving vehicle body and a steering vehicle body, wherein the driving vehicle comprises a driving vehicle main body and a power driving device; two magnetic wheels are mounted on the driving vehicle main body, are driven by the power driving device and function as rear driving wheels; the steering vehiclebody comprises a steering vehicle main body and a steering device; the two magnetic wheels are mounted on the steering vehicle main body, are used for controlling steering through a steering device and are used as front steering wheels; the driving vehicle main body is connected with the steering vehicle main body through a suspension gear with a specific rotation freedom degree. As a permanent magnet is creatively combined with wheels, stable sucking of wheels is achieved, and possibility of normal operation of an image transmission component, a mechanical arm component and an ultrasonic flawdetection component behind can be created.
Owner:WUHAN UNIV OF TECH
Vehicle and control method of vehicle
ActiveUS20080093141A1Increase fuel consumptionEasy to operateHybrid vehiclesDigital data processing detailsSpecific rotationControl theory
The control procedure of the invention sets a target rotation speed Ne* and a target torque Te* of an engine corresponding to a torque demand Td* required for driving the vehicle (steps S100 to S120). In response to an upshift request for a gear of a transmission, the control procedure sets a positive pre-upshift target rotation speed Nmtag to a target rotation speed Nm1* of a first motor (step S230). The control procedure changes the target rotation speed Ne* of the engine to a specific rotation speed corresponding to the pre-upshift target rotation speed Nmtag of the first motor (step S240) and subsequently implements an actual change of the gear in the transmission (step S310). This arrangement effectively restrains a battery from being overcharged with excess electric power.
Owner:TOYOTA JIDOSHA KK
Dual-axis rotary modulation system full-parameter self-calibration method
InactiveCN109029500ATo achieve the purpose of full parameter calibrationRealize full parameter separation and calibrationMeasurement devicesObservational errorAccelerometer
The invention discloses a dual-axis rotary modulation system full-parameter self-calibration method, applied to various static and dynamic pedestal environments such as static, shaking, navigation andthe like. Through accurately establishing a full-parameter measurement error model of an inertial measurement unit (IMU), and designing a specific rotation order of transposition of inner and outer frames, each measurement error parameter of the IMU can be stimulated comprehensively, which is embodied in variation tendencies of inertial navigation solution speed and position error finally; the inertial navigation speed and position are compared with external reference information to obtain measurement values of the speed error and the position error; and a Kalman filter is used as a mathematical realization tool of the calibration scheme, and finally the self-calibration without disassembly and assembly of full parameters such as zero-bias error, installation angling error, scale coefficient error and other parameters of three axial gyros / accelerometers is realized, and the overall performance of the inertial navigation system can be improved after compensation.
Owner:XIAN FLIGHT SELF CONTROL INST OF AVIC
Online monitoring method for operation state of large-sized variable-speed water-feeding pump
ActiveCN106050637AMeet the needs of condition-based maintenanceEasy accessPump testingPump controlDaily operationEngineering
The invention relates to an online monitoring method for the operation state of a large-sized variable-speed water-feeding pump. The method comprises the steps of recording the operation parameter of the water-feeding pump in a monitored state, according to a designed flow-head curve of the water-feeding pump, determining the numerical function of the boundaries of the normal operation area of the water-feeding pump, collecting the operation data of the water-feeding pump in a normal new running state, fitting out the flow-head performance curve of the water-feeding pump at a certain specific rotation speed after amendment, judging whether the water-feeding pump operates in the normal operation area or not according to the operation parameter of the water-feeding pump in the monitored state, if not, giving out an abnormal operation state alarm prompt, carrying out amendment till the certain specific rotation speed of the water-feeding pump is matched with the normal state curve according to the operation parameter of the water-feeding pump in the monitored state, and giving out an alarm prompt for the abnormal operation state of the water-feeding pump if the deviation between the rotation speed and the normal state curve exceeds a certain degree. By means of the method, the daily operation state of the water-feeding pump can be monitored, and judging criteria for the situation that the operation state of the water-feeding pump deviates from the normal operation area are provided
Owner:STATE GRID HEBEI ENERGY TECH SERVICE CO LTD +2
Electric machine with Q-offset grooved interior-magnet rotor and vehicle
ActiveUS9300176B2Improve efficiencyImprove performanceAC motor controlVector control systemsMagnetic reluctanceStator coil
A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.
Owner:HITACHI ASTEMO LTD
Method for testing speed-adjusting function of system fan
InactiveCN102797693ADifficulty of SimplificationPump controlNon-positive displacement fluid enginesIntelligent Platform Management InterfaceLow speed
The invention provides a method for testing the speed-adjusting function of a system fan, wherein the IPMI (Intelligent Platform Management Interface) instructions of an OEM (original equipment manufacturer) are sent to a BMC (Baseboard Management Controller); according to the IPMI instructions, the BMC controls the system fan in four grades, such as a low speed, an intermediate speed, a high speed and a full speed, then checks the rotation speed of the fan, and determines whether the rotation speed of the fan is in a specific rotation speed grade; therefore, the purpose of testing and verifying the correctness of the speed-adjusting function of the fan is achieved; and the method comprises the following specific steps: (1) formatting a U flash disk into a Dos startup disk under a windows system; (2) copying IPMIToo1 software under Dos into the U flash disk; (3) starting a system to enter the Dos, sending specific IPMI instructions to the BMC by using the IPMIToo1 software, and controlling the rotation speed of the fan to be in a specific rotation speed grade according to the IPMI instructions by the BMC; and (4) sending the IPMI instructions to read all rotation speeds of the fan by using the IPMIToo1 software, and judging whether all the rotation speeds of the fan are below the specific rotation speed grade.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Method for preparing mezlocillin sodium for injection
ActiveCN102895181AImprove drug stabilityImprove injection safetyAntibacterial agentsPharmaceutical delivery mechanismMicrometerNitrogen
The invention relates to a method for preparing mezlocillin sodium for injection, comprising the following steps of introducing nitrogen filtered by a 0.22 micrometer membrane filter to an injection bottle subjected to sterilization pretreatment, separately loading mezlocillin sodium with the specific rotation of +190-(+195) DEG into the injection bottle, introducing nitrogen to the separately-loaded drug, covering the bottle with a pretreated rubber plug, finally putting into a bottle capping chamber, capping the bottle by using an aluminium cap and obtaining mezlocillin sodium for the injection. According to the invention, the injection preparation is prepared by selecting mezlocillin sodium with the specific rotation of +190-(+195) DEG and the pH value of 7.0-7.5, therefore, mezlocillin sodium for the injection is better in drug stability and safer when serving as the injection preparation.
Owner:SICHUAN PHARMA
Voglibose semi-hydrated crystal, its preparation method and its uses in medicament formulation
InactiveCN101007771AHigh purityHigh yieldOrganic active ingredientsOrganic compound preparationCrystal systemInfrared
The invention discloses a Fuge train wave hemi-hydrated crystalline with 0.5 molecular crystallinic water, whose structure and character is simulated by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis (TG), differential scanning calorimetry (DSC), infrared spectrum (IR), element analysis and specific rotation, wherein the molecular structure is C10H21NO7 .0.5H2O, which belongs to orthogonal crystal system in the P2(1)2(1)2(1) spatial group; the cell parameter a is 9.877(2); b is 9.905(2); c is 26.760(5); alpha is 90 deg; beta is 90deg; gamma is 90 deg; R is 0.0324.
Owner:PHARMAXYN LAB
Encoder and method of calculating rotational angle position
ActiveCN105606019AImprove calculation accuracyUsing electrical meansRotation velocityClassical mechanics
The invention provides an encoder and a method of calculating a rotational angle position, wherein the encoder can reduce the error for the detected rotational angle position. A signal processing unit of an encoder unit is provided with a rotational angle position calculation unit (110), a calibration scale (120) and a calibration unit (130). The rotational angle position calculation unit (110) detects the rotational angle position according to a signal of a detection element; the calibration scale (120) stores the calibrating values by enabling the calibrating values to be corresponding to the divided angle positions; the calibrating values are used for offseting the error, of the rotation speed, stacked on the signal of the detection element; the divided angle positions are divided during one circle of rotation under the specific rotation speed; and according to the calibrating values stored in the calibration scale (120), the speed and the calibration value corresponding to the divided angle are calculated.
Owner:SANKYO SEIKI MFG CO LTD
Novel magneto-optic single crystal material growing method
InactiveCN104775153AReduce volumeReduce weightLiquid-phase epitaxial-layer growthMetallurgyRare earth
The invention relates to the fields of growth techniques for novel magneto-optic materials and optical fiber communication, in particular to a growth technique for Bi-doped rare-earth garnet film (ReBi)3Fe5O12 grown through a liquid phase epitaxial method. The method includes the following steps that (A) PbO powder with purity being above 99.99%, B2O3 powder with purity being above 99.99%, Bi2O3 powder with purity being above 99.99%, Fe2O3 powder with purity being above 99.99% and Re2O3 powder with purity being above 99.99% are uniformly mixed in a determined proportion, then put into a platinum crucible and placed in a liquid phase epitaxial furnace; (B) raw materials in the platinum crucible are heated and rotated to be fully melted, and ingredients are even. The method has the advantages that the Bi-doped magneto-optic film is grown through the liquid phase epitaxial method, the growth cycle is greatly shortened, the thickness can reach hundreds of microns, the requirement for specific rotation can be met, machining is facilitated, the size and weight of a magneto-optic device are reduced, and integration of the device is achieved.
Owner:SOUTHWEST INST OF APPLIED MAGNETICS
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com