32results about How to "Avoid concentration changes" patented technology

A plastic container for liquid medicine, which, concerning the effective components of liquid medicine, is capable of prevention of deterioration in quality due to mixing of oxygen and water vapor, prevention of variation in concentration due to water volatilization and moisture absorption, etc. A plastic container for liquid medicine, which is a plastic container internally coated with DLC (diamond-like carbon) film wherein water vapor permeability is 0-0.006 g/container/day and oxygen permeability is 0-0.011 ml/container/day, such properties being obtained by optimizing the three conditions, composition, density and film thickness of the DLC film.

The invention relates to a metering pump which is provided with a rotation driving motor and a swing piston; wherein, the rotation motion of the driving motor is converted into the swing of a connecting rod by a transmission device, thus leading the displacement device driven thereout to carry out a linear swing with the continuous rotation of the driving motor; therefore, the medium to be measured is transmitted in a metering head (12); the metering head is arranged along the longitudinal axis line of a connecting rod (19) and is alternatively matched with an outlet valve and an inlet valve so as to generate a pumping stroke (pressure stroke) and a filling stroke. In the metering pump, a reference element (35) is relevant to the connecting rod; the position of the connecting rod is detected by a position sensor; wherein, the position sensor provides a practical signal (x1) which forms a fixed relation with the position of the reference element, thus forming a fixed relation with the position of the displacement device; furthermore, the signal also provides an information which is corresponding to the motion of the displacement device, therefore, the electronic control system of the metering pump can respond to the metering circuit and the operation conditions of the pump.

The method for on-line monitoring ammonia nitrogen includes following steps: Ammonia nitrogen escaped from the sample is blown in the absorption liquid. With ammonia nitrogen being leaded in the absorption liquid, testing the conductance value of the absorption liquid and comparing the said conductance value with the calibrated conductance value of the absorption liquid calculates out the contentof ammonia nitrogen in the sample. In the invention, ammonia is separated from the sample so as to prevent the irrespective elements (such as suspended matter) in the sample from disturbing the measurement. The traditional distillation method spends more time and gets low measuring accuracy and sensitivity since the absorption liquid is diluted by the vapor. Comparing with prior art, the invention provides the features of high accuracy (0.01 ml/L), and high efficiency.

The invention discloses an electrostatic spinning nanofiber generating device. The electrostatic spinning nanofiber generating device comprises a fiber generator, a fiber collecting device and a high-voltage generator, wherein the fiber generator comprises a spinning cavity, silk spray thread slots and a liquid storage tank; a slit is formed in each silk spray thread slot, and is communicated with the inner part of the spinning cavity; the liquid storage tank is communicated with the spinning cavity; each silk spray thread slot adopts a structure with twists and turns; the fiber collecting device is placed right above the silk spray thread slots; the high-voltage generator is provided with a high-voltage terminal and a ground terminal. According to the electrostatic spinning nanofiber generating device disclosed by the invention, nanofibers are produced by using viscous liquid as raw materials and utilizing an electrostatic spinning principle. Compared with the prior art, the core of the electrostatic spinning nanofiber generating device disclosed by the invention is the fiber generator with the bent slits; through the adoption of the fiber generator, the change of the concentration of spinning liquid, which is caused by solvent evaporation, is effectively inhibited, so that the producing stability of the nanofibers is greatly improved; besides, the uniformity and the production efficiency of produced fiber films are improved, so that the electrostatic spinning nanofiber generating device is suitable for the continuous scale production of nanofibers.

In an image forming apparatus 1 including a photoconductive drum 31 on which an electrostatic latent image is formed and a developer carrier that is allowed to carry a developer thereon by a developing bias voltage applied thereto composed of a DC component and an AC component and that is arranged in the vicinity of the photoconductive drum 31, the image forming apparatus 1 visualizing the electrostatic latent image using the developer carried on the developer carrier, a high-frequency region A with respect to which image forming is performed with the frequency of the AC component of the developing bias voltage increased and a low-frequency region B with respect to which image forming is performed with the frequency of the AC component of the developing bias voltage decreased are formed in an image to be formed on recording paper.

The invention discloses a surface-enhanced Raman spectroscopy-based photocatalytic in-situ monitoring system. The monitoring system comprises a Raman excitation light source, a laser coupling lens, anarrow band filter, a total reflection mirror, a dichroic mirror, a focus coupling lens, a surface enhanced Raman scattering fiber probe, a liquid phase photocatalytic reactor, a photocatalytic lightsource, a Raman collection lens and a spectrometer, wherein one end of a common detecting portion of the surface-enhanced Raman scattering fiber probe extends to from a first branching portion and a second branching portion; the extending end of the first branching portion is coupled to the focus coupling lens, and the extending end of the second branchingportion is coupled with the photocatalyticlight source; the other end of the common detecting portion is disposed in the liquid phase photocatalytic reactor; and a Raman excitation light and a photocatalytic light are in co-transmission, which greatly reduces the experimental difficulty and can effectively avoid a monitoring error caused by incomplete coincidence of focus points, thereby effectively improving the accuracy of Raman dynamic monitoring. The monitoring system is compact in structure and high in portability.

The invention discloses a soilless covering agent in the field of landfill treatment. The soilless covering agent comprises the following raw materials in parts by weight: 700-750 parts of sludge, 950-1000 parts of garbage concentrate, 100-120 parts of straws, 60-70 parts of newspaper and 720-750 parts of clay. The soilless covering agent disclosed by the invention is a comprehensive utilization of the garbage concentrate and the domestic sludge; thallus in the sludge is adhered to the straw and the newspaper, and colloids and the clay in the sludge can be quickly cured, and further, a curingfilm is formed, therefore, a suitable growth environment is provided for microorganisms, the sludge is reasonably treated, and the problem that the garbage leachate concentration is higher and higherwhile the decomposition treatment of garbage is facilitated.

The invention discloses a paint stirring device. The paint stirring device comprises a paint stirring device body and a bracket used for supporting the paint stirring device body, wherein the paint stirring device body is fixedly connected with the upper end face of the bracket; a top cover is fixed on the upper end face of the paint stirring device body; a hole used for mounting a rotary shaft is formed in the top cover; a sealing piece is fixedly arranged between the rotary shaft and the top cover; the upper end of the rotary shaft is fixedly connected with a power connecting piece; the lower end of the rotary shaft is fixedly connected with a stirring paddle; the upper end of the stirring paddle is fixedly connected with a scraper plate used for collecting materials splashed onto the inner surface of the paint stirring device body; a discharging opening is further formed in the lower end face of the paint stirring device body and is fixedly connected with a discharging opening cover. The paint stirring device has the positive effects that by internally arranging the scraper plate, the phenomenon of change of the overall concentration of the materials such as mortar caused by adhesion of the mortar to the inner wall of the paint stirring device during stirring can be effectively prevented.

The invention discloses a filling device special for an injectable suspension. The filling device comprises a dosing device, a dosing control valve and a filling head. The dosing device comprises a piston booster device and a dosing cavity. A dosing cavity inlet and a dosing cavity outlet are formed in the lower part of the dosing cavity. The dosing cavity is connected with the filling head. The dosing control valve is a three-way valve and comprises two inlets and a liquid outlet. One of the inlets is connected with the filling head. The other inlet is connected with the dosing cavity outlet.The filling head is internally provided with a control valve set. A liquid inlet, a dosing cavity connecting opening, a dosing control valve connecting opening, a filling opening and a liquid discharging opening are formed in the filling head. The dosing cavity connecting opening in the filling head is connected with the dosing cavity inlet. The dosing control valve connecting opening is connected with one inlet of the dosing control valve. The liquid discharging opening is controlled to communicate with the filling opening through a piston. A filling container is arranged at the lower part of the filling opening. Liquid can be made to be always at a circulation state in the filling process, the consistency of concentration of the injectable suspension is ensured, the filling quality is ensured, and a non-mixed suspension liquid can be filled.

The invention belongs to the technical field of fresh-keeping, and particularly relates to a fresh-keeping method for picked fruits and vegetables. According to the method, the picked fruits and vegetables are sequentially subjected to cold shock treatment and packaging treatment, and the gas environment in the package can be changed, so that the consumption of nutrient substances caused by respiration is reduced, the loss of water is reduced, the hardness of the picked fruits and vegetables is maintained, the increase of the weight loss rate is slowed down, and the oxygenolysis of chlorophyll is delayed, and the original color of the picked fruits and vegetables is maintained to a great extent; the fruit and vegetable fresh-keeping agent is capable of delaying yellowing of fruits and vegetables, inhibiting physiological metabolic activities of the picked fruits and vegetables, delaying consumption of soluble solids of the fruits and vegetables, inhibiting membrane lipid peroxidation, reducing accumulation of malonaldehyde and inhibiting concentration change of volatile organic compounds, has a synergistic effect on physicochemical, nutrition and flavor quality of the picked fruits and vegetables, and improves the fresh-keeping effect of the picked fruits and vegetables.

The invention provides a tailing deposition test system which comprises a stirring system, a pumping and discharging system, a deposition model tank, a wake flow backflow circulating system and a monitoring system, and the stirring system, the pumping and discharging system and the deposition model tank are sequentially connected through test pipelines. The sedimentary model tank and the wake flow backflow circulation system are respectively connected with the stirring system through test pipelines, a stirrer is arranged in a material storage pool of the stirring system, a monitoring system is arranged on the sedimentary model tank, the stirrer is started during ore drawing, and the situation that particles in tailing pulp deposit in the material storage pool, so that the concentration of ore pulp changes in the ore drawing process is prevented; the technical problem that when ore pulp stored in a storage pool is discharged into a sedimentary model groove through a pumping system, if the storage time of the ore pulp in the storage pool is too long, solid particles in the ore pulp are prone to depositing in the storage pool, and the concentration of the ore pulp changes in the ore drawing process is solved.

The invention discloses a method for detecting dibutyl phthalate through a fluorescence ratio method based on dual-emission carbon quantum dot marked nucleic acid aptamer. Sensitive detection of dibutyl phthalate is realized by taking dual-emission carbon quantum dots as a marker and combining with an aminated nucleic acid aptamer specifically recognizing dibutyl phthalate; the method is low in detection limit, high in specificity, stable in fluorescent performance and suitable for ultrasensitive quick detection of dibutyl phthalate in food.

The invention relates to a magnetic powder flaw detection magnetic suspension containing device which comprises a tool box body used for containing magnetic suspension, a liquid pump is arranged in the tool box body, the liquid pump is electrically connected with a corresponding power supply and used for pumping the magnetic suspension in the tool box body, and a plurality of stirring air pipes are arranged in the tool box body and located on the periphery of the liquid pump. One end of the stirring air pipe is immersed and communicated with the magnetic suspension, and the other end of the stirring air pipe is communicated with an air source through a corresponding pipeline and an air valve and used for stirring and stirring the magnetic suspension through compressed air. Manual stirringis replaced, the magnetic suspension is stirred in real time through compressed gas, the concentration change of the magnetic suspension in the using process is avoided, operation is simple and easy,and the stirring strength is adjustable.