48results about How to "Will not affect the result" patented technology

The invention provides a testing device of a battery protection circuit, the battery protection circuit comprises a battery voltage detection unit for sending a protection trigger signal when detecting that the Vcc voltage of a power port reaches a preset protection threshold; and a control unit for generating an impedance regulation signal according to the protection trigger signal, and the impedance regulation signal is used for regulating the impedance between the power port in a drive unit and a charge protection execution end Cout or a discharge protection execution end Dout. The testing device comprises a calculation unit for calculating the voltage difference between the power port and the charge protection execution end Cout or the discharge protection execution end Dout; and a comparison unit for comparing the voltage difference calculated at this time with the voltage difference calculated at the last time, if the comparison result exceeds the preset difference value, then test feedback information is output. The invention can simplify the test operation and reduce the test time on the basis of not affecting the normal use of the circuit.

The invention relates to a purity evaluation device for electronic-grade trichlorosilane. The device comprises a chassis, a bell-jar, which is arranged on the chassis and has a cooling water jacket, a tantalum filament, which is arranged in the bell-jar with the cooling water jacket, and a pair of electrodes, which go through the chassis and are connected to the power supply. The top part of the bell-jar with the cooling water jacket is provided with a hanger and a bell-jar cooling water outlet, the side wall of the bell-jar with the cooling water jacket is provided with a bell-jar cooling water inlet and a sight glass; the two electrodes are connected through the tantalum filament, the outside of the pair of electrodes is provided with a reaction gas inlet and a reaction gas outlet, and the reaction gas inlet and the reaction gas outlet go through the chassis and communicate with the cavity of the bell-jar with the cooling water jacket. The purity evaluation device for electronic-grade trichlorosilane has the advantages of simple structure and low cost, achieves the goals of rapid and precise purity measurement, and realizes safety operation.

The invention belongs to the field of fine chemical extraction, and in particular relates to an extraction treatment method for detection and analysis of vitamin A in food. First, the food sample is freeze-dried to remove water, then the freeze-dried food sample is added to the chloroform-ethanol mixture and homogenized at high speed, then the homogenized sample is centrifuged and the chloroform extract located in the lower layer is collected, and the extract is dried with nitrogen. Ethanol is added to reconstitute and purify the vitamin A, and ultrasonic waves are used in the redissolution step to completely dissolve and extract the vitamin A. The extraction of the present invention does not require processes such as lye saponification and degreasing and vacuum distillation in the traditional method, and also overcomes the problems of incomplete dehydration of food samples caused by adding anhydrous sodium sulfate to grind and absorb water, and has the advantages of simple operation and shortened time , high extraction efficiency, etc., and also overcomes the danger of using ether, n-hexane or methanol as the extraction solvent. Due to the water solubility of ethanol, even trace amounts of water in the extracted sample will not affect the results.

The invention relates to a use of a piperazinopyrimidine isotope labeling reagent. The piperazinopyrimidine isotope labeling reagent is a light / heavy isotope labeling reagent of [d0]- / [d6]-2,4-dimethoxy-6-piperazinopyrimidine. The piperazinopyrimidine isotope labeling reagent can be used for comparison analysis of carboxyl compounds such as fatty acid, polypeptides or proteins. Fatty acid analysis comprises the following steps of a) fatty acid reacts respectively with light and heavy labeling reagents; after after-treatment, an LC-MS / MS analysis process is carried out; and product ions m / z 225 and m / z 231 are selected as quantitative ions; and b) through observation of pairs of mass spectrum peaks of the labeled fatty acid, identification of a plurality of carboxyl fatty acids is realized and quantification is realized according to relative peak areas. Polypeptide / protein comparison analysis comprises the following steps of a) a protein needing to be analyzed is subjected to thermal denaturation and enzymolysis and then reacts with the light / heavy labeling reagent; and b) the reaction solution is subjected to after-treatment; and a MALDI-TOF MS comparison analysis process is carried out.

The invention discloses a method for detecting infectious disease pathogens possibly existing in a biological sample. The infectious disease pathogens comprise EB virus, herpes simplex virus, cytomegalic inclusion disease virus and adenovirus. The method comprises the following steps: expanding nucleic acid fragments of the biological sample, and detecting the nucleic acid fragments by using a probe. The invention also provides primers used for expanding and the probe used for detection. The invention also provides a kit comprising the primers. The method has the advantages of high sensitivity, strong specificity, simple operation and wide sample range, can simultaneously detect various infectious disease pathogens, and is suitable for early diagnosis of respiratory infectious diseases.

The invention discloses a method for detecting infectious disease pathogens possibly existing in a biological sample. The infectious disease pathogens comprise chlamydia pneumoniae, haemophilus influenzae, mycoplasma pneumoniae, pneumoniae streptococcus and legionella pneumophila. The method comprises the following steps: expanding nucleic acid fragments of the biological sample, and detecting the nucleic acid fragments by using a probe. The invention also provides primers used for expanding and the probe used for detection. The invention also provides a kit comprising the primers. The method has the advantages of high sensitivity, strong specificity, simple operation and wide sample range, can simultaneously detect various infectious disease pathogens, and is suitable for early diagnosis of respiratory infectious diseases.

The invention discloses multiple real-time quantitative PCR primer, probe and a detection method for identifying viral pathogens relevant to fevers with eruption syndromes as infection diseases, which is used for carrying out multiple real-time fluorescent quantitative PCR detection on varicella-herpes zoster viruses, human small DNA (Deoxyribonucleic Acid) viruses B19, enteroviruses (enteroviruses 71 type and coxsackie viruses A16 type), dengue viruses, rubella viruses and measles viruses. The invention can simultaneously carry out qualitative or quantitative detection on eight kinds of human viruses in various types of samples by multiple double-tubes PCR. The detection method has the advantages of simple operation, short time consumption, high sensitivity and strong specificity, is suitable for field detection, early diagnosis, epidemics detection and research and the like, and takes the actions of assistance and identification diagnosis on the fevers with eruption syndromes.

The invention discloses a program-controlled variable 5-bit reciprocal microwave monolithic integrated attenuator. The program-controlled variable 5-bit reciprocal microwave monolithic integrated attenuator comprises an input port standing wave adjusting module, a microwave attenuating module, an output port standing adjusting module and a control module (27), wherein the input port standing wave adjusting module is completely symmetrical to the output port standing wave adjusting module. The program-controlled variable 5-bit reciprocal microwave monolithic integrated attenuator has the following advantages: the attenuator has very small microwave signal loss because all of attenuation networks are connected in parallel; all of control switches and microwave single-pole single-throw switches have excellent switching performance by adopting small GaAs field effect transistors, and the attenuator has wide working bandwidth; the attenuating circuit is connected with a microwave amplitude balancing circuit in parallel, so that the attenuation in the whole working frequency band is flat and balance; attenuation control codes are irregular so as to obviate large influences on the result when a certain bit offsets; and the introduction of the novel structure can lower the sensitivity to the process, thereby improving the chip yield from 60% to 80%.