34results about How to "Irreversible damage" patented technology

An antitheft and monitoring system (10, 11) for a plurality of photovoltaic panels (1), wherein the panels (1) are connected by means of a connection line (L) to a distribution substation (5). The monitoring system (10, 11) comprises a first unit (11) associated to the distribution substation (5), wherein the first unit (11) is designed to generate activation codes (4), and a plurality of second units (10) associated to the panels (1), wherein each of the second units (10) is designed to inhibit operation of the respective panel (1) in the absence of the activation code (4) for a pre-set period. Furthermore, each second unit (10) is selectively activatable via a unique activation code(4) generated by the first unit (11). The antitheft and monitoring system is moreover configured to activate an individual panel (1) selectively by sending onto the connection line (L) the corresponding unique activation code (4) and detecting, via a measuring device (22), the characteristics of voltage and current of the individual active panel (1).

Ultrasonic wave with cavitation and magnetic field with scale preventing effect are used together in preventing membrane pollution. The apparatus consists of supersonic wave generator installed inside or outside the membrane module and permanent magnets set on outer wall of the membrane module. Ultrasonic wave produces vibration to prevent colloid particle, bacteria and organic matter from depositing on the membrane and its cavitation produces great amount of bubbles to clean the dirt on the membrane. Magnetic field is utilized to prevent calcium, magnesium and other inorganic ions from depositing on the membrane. Their combination produces excellent effect of preventing and eliminating the membrane pollution. The strengths of the ultrasonic wave and the magnetic field are relatively low and thus there will be no damage to the membrane.

The invention discloses a reconstructive peeping prevention optical PUF. The PUF comprises a substrate, a medium nanometer granular layer growing on the substrate and metal nano particles which have different particle sizes and are randomly doped in the medium nanometer granular layer. Through doping the metal namo particles with the different particle sizes in the medium nano particle scattering layer, by use of the optical absorption selectivity of the metal nano particles with different dimensions, the optical PUF is extremely sensitive to the wavelength of an incident laser; during normal operation and application of a specific wavelength for excitation, the optical PUF generates strong scattering to form a specific speckle pattern for identity authentication; and during application of a laser beyond the specific wavelength, the metal nano particles included in the optical PUF are melted, the microstructure of the PUF is irreversibly damaged, and thus a substantial influence is exerted on the speckle response of the PUF. Therefore, while physical unclonnable feature is obtained, malicious peeping can be effectively prevented, and the microstructure can be reconstructed.

The invention provides a serum-free separating and culturing method for a sheep embryo stem cell, comprising the following steps of: removing a zona pellucida of sheep blastula cultured in vitro with a Tyrode's Solution and then inoculating the sheep blastula to a serum-free culture solution of the sheep embryo stem cell and fixing by using a needle head; placing under the conditions that the temperature is 38.6DEG C and the saturated humidity is 5 percent CO2 for culturing; during the culturing, replacing the culture solution in a half quantity every 48 hours with the pH value of 6.8-7.2 andprimarily culturing for 7-9 days; and carrying out the transfer culture once according to the ratio of 1:2-1:4 by adopting a conventional mechanical method, that is to say, transferring the sheep embryo stem cell cultured in vitro to the 16th generation. The serum-free culture solution of the sheep embryo stem cell is prepared from D-MEM / F-12+80ng / mL bFGF+3muMCHIR 99021+10mu L / mL N2+20mu L / mL B27+10mu L / mL NEAA+2mM L-Glutamine+0.2mM beta-Mercaptoethanol. Bared embryos are fixed at the bottom of a culture dish by using a No.32 needle head so as to avoid the damage to the cells in the blastula, and a baked embryo trophocyte is stripped off. The preferable inoculating amount of the baked embryos is 45-60 / groups. The method can ensure that the formation rate of primary colony of sheep embryo stem cells is improved to 33 percent (14 / 42).

A zero-discharge process and system for activated carbon flue gas purification of acid-making wastewater. The complex wastewater of acid-making is processed through steps 1)-step 4) in sequence. After treatment, it is used as a substitute for industrial fresh water for sintering or steel mills Flushing slag. The gas produced in step 1) and step 2) can be recycled for secondary use. Under the action of the acid dehydration device, the sludge generated by the acid precipitation device will be recycled, and the acid filtrate generated will be recycled through the fifth pipeline. The resulting deacidified sludge is recycled through the sixth pipeline. The solution provided by this application can aim at water quality characteristics, rationally utilize process technology, improve treatment efficiency and operation stability, reduce investment and operation costs, reduce operation and maintenance difficulty, and reduce air pollution at the same time, and can be distributed and utilized reasonably. Recycling and eliminating exhaust gas and waste materials in the process is conducive to reducing production costs and meeting environmental protection standards.

The invention refers to the technical field of disposable vacuum blood sampling, in particular to a self-destructive mechanism of an axial filling adhesive type disposable blood sampling syringe needle. The self-destructive mechanism is composed of a guide cylinder, an upper guide curved face, a positioning hole, a lower guide curved face, a locking pipe, an intubation tube, a piston, an annular bulge, a sac, 502 glue water, a sealing fin, a glue outlet and an annular hollow. The space in the guide cylinder comprises the upper guide curved face, the positioning hole and the lower guide curved face; conical spaces corresponding to the upper guide curved face and the lower guide curved face are in communication with the positioning hole. The bottom part of the locking pipe is bonded with the sac made of polyethylene plastic film. According to the self-destructive mechanism provided by the invention, the inner part of the syringe needle can be blocked, so that the syringe needle is irreversibly destructed; and therefore, the reutilization of the disposable syringe needle by criminals is radically eliminated.

The invention discloses a method for cutting DNA based on flaxcycline A, which belongs to the field of biotechnology. The present invention utilizes flaxcyclopeptide A to cut DNA, and under suitable conditions, the cutting efficiency can reach 100%, and it is free radical cutting, which can cause irreversible damage to DNA, and is useful for exploring the effect of plant cyclopeptide and DNA and Designing new DNA structure probes has certain guiding significance, and makes it possible to use it as a new anti-tumor drug in the field of drug development.