31results about How to "Good test reproducibility" patented technology

The invention relates to a device for testing the pull torque, and the device comprises a pull torque test platform, a power line fixing device, a weight assembly and a lifting rotary device. The power line fixing device is arranged at the upper end of the pull torque test platform, while the lifting rotary device is arranged at the lower end of the pull torque test platform. A to-be-tested power line is fixed on the pull torque test platform via the power line fixing device. The operation method comprises the following steps: configuring the weight of the weight assembly according to the pressure to be applied, connecting the configured weight assembly with the power line, and placing the weight assembly connected with the power line on the lifting rotary device; rotating the lifting rotary device as required by the test to enable the power line at a required to-be-tested state; reciprocating the lifting rotary device to finish multiple times of pull torque tests of the power line at the to-be-tested state. The device is simple in operation and good in test reproducibility by using weight for testing. Meanwhile, the test tension and torque are applied more uniformly.

The invention relates to an ophiocordyceps xuefengensis stroma and an artificial cultivation method thereof. The method comprises the following steps: performing tissue separation for a culture, a wild culture or a stroma obtained after successful cultivation of the culture, inoculating into a slant culture medium, preparing a slant mother strain, then inoculating the slant mother strain into a liquid culture medium, preparing a primary culture, inoculating the primary culture into the liquid culture medium to prepare a spawn, and culturing the spawn in a culture medium for production to obtain the artificially-cultivated ophiocordyceps xuefengensis stroma. The ophiocordyceps xuefengensis stroma and the artificial cultivation method thereof have advantages of simplicity in operation, low cost, experimental reproducibility and the like, are suitable for mass production and have wide development prospect.

The invention relates to a measuring method and device of a spectrometer while drilling for measuring oil and gas components. It includes a parabolic reflector for collimating the luminous point of the light source, and is characterized in that a sampling gas chamber and a reference gas chamber and a detector with four channels and four independent thermopiles are arranged behind the reflector, and each channel is equipped with one Filters and transmission windows, and detectors are installed on semiconductor cooling chips. This patent mainly has the following advantages: fast analysis speed; low analysis cost; good test reproducibility; online analysis, through the current mature downhole signal transmission technology; small size, especially small cross-section, easy to integrate into drilling while drilling In the equipment; low power consumption; the driving current of the new infrared radiation light source is only about 100mA, considering the pulse width modulation of 20‑50% duty cycle, the actual power is even lower.

An asphalt mixture pressure type permeameter comprises a controller air storage sac, wherein the air inlet end of the air storage sac is communicated with an air-filling device through an electromagnetic air inlet valve which is installed on a guide pipe, the air outlet end of the air storage sac is communicated with a sealing cover through an electromagnetic air outlet valve which is installed on the guide pipe, the electromagnetic air inlet valve and the electromagnetic air outlet valve are connected with a controller through leads, and a pressure sensor which is connected with the controller through the lead is arranged on the side wall of the air storage sac. The asphalt mixture pressure type permeameter further comprises a timing device and a counter weight which is arranged on the edge of the sealing cover. Air is taken as medium, the controller controls the air inlet valve and the air outlet valve of the air storage sac, so the compressed air passes by an asphalt mixture test piece which is linked with the sealing cover, the pressure sensor sends the pressure signal to the controller, the controller converts the pressure signal into time signal, the timing device displays the time for reducing the air storage sac from one fixing air pressure to another fixing air pressure, so the permeability of the test piece is measured, the test time is greatly shortened, the efficiency is high, and water resources are saved.

The invention relates to a method for preparing 2, 6-dichloro-5-fluorine nicotinoyl ethyl acetate, which comprises the following steps: taking 2, 6-dichloro-5-fluorine-3-pyridine carbonitrile as a raw material, producing a zinc salt intermediate 3-(2, 6-dichloro-5-fluorine-3-pyridyl)-3-imino ethyl propionate zinc bromide, and then acidating the zinc salt intermediate into an imido ester intermediate 3- (2, 6-dichloro-5-fluorine-3-pyridyl)-3-imino ethyl propionate, thus obtaining the 2, 6-dichloro-5-fluorine nicotinoyl ethyl acetate through the acidolysis of the imido ester intermediate. The method is characterized in that the temperature for acidification of the zinc salt intermediate to the imido ester intermediate is 0-10 DEG C and the pH thereof is 2-3, the oily liquid of unhydrous imido ester intermediate can be separated through extracting and distilling the produced imido ester intermediate; the acidolysis of the imido ester intermediate is carried out in absolute ethyl alcohol solvent, and the acid catalyzed alcoholysis of the oily liquid of unhydrous imido ester intermediate is carried out with absolute ethyl alcohol solution of hydrogen chloride or concentrated sulfuric acid under the temperature of 20-30 DEG C. The total yield reaches 88-95 percent, the purity reaches 99 percent, and the invention has good reproducibility.

The invention belongs to a microcoulomb analysis method for the chlorinity high-temperature burning of organic phosphate fire-resistant oil and a device thereof, belonging to the field of power analysis chemistry and solving the defects of complicated operation steps, long time consumption, unobvious titration end point, poor accuracy and repetitiveness and high cost existing in the prior art. Thedevice comprises a high-temperature furnace and a burning tube inserted in the high-temperature furnace; the burning tube is provided with an oxygen interface, a nitrogen interface and a sample inletand comprises a gasifying section and a burning section, one end of the burning tube is connected with a sample inlet device, and the other end is connected with an electrolytic bath. The device adopts heating, gasifying and electrolytic analysis methods to obtain the chlorinity of a sample. The invention has simple and convenient operation and rapid analysis speed and adopts a microcoulomb method to analyze titration and judge the end point so as to be more accurate than the prior oxygen bomb method by visual inspection and manual measurement, have good test repetitiveness, avoid using toxicchemical reagents and improve the safety.

The invention discloses an enzyme-linked immune rapid detection microfluidic chip and a pretreatment and detection method thereof. The microfluidic chip includes a first chip layer and a second chip layer; at least one detection channel is distributed in the first chip layer and is provided with a first sample inlet, a second sample inlet and a sample outlet, and the second sample inlet is located between the sample outlet and the first sample inlet; the second chip layer can move relative to the first chip layer and is provided with a third sample inlet and a fourth sample inlet, and conditions are met: when the second chip layer is at a first position, the third sample inlet communicates with the first sample inlet, and the fourth sample inlet does not communicate with the second sample inlet; and when the second chip layer is at a second position, the third sample inlet does not communicate with the first sample inlet, and the fourth sample inlet communicates with the second sample inlet. The amount of detection used samples is greatly reduced; after pretreatment, after a to-be-detected sample is incubated, a detection reagent is added and a result can be quickly analyzed.