38results about How to "Overcoming the problem of poor stability" patented technology

The invention relates to a mining conveyer carrier roller fault monitoring, positioning and warning device. By laying sensing optical fibers on two sides of a carrier roller, vibration information of a conveying belt passing through the carrier roller is captured and is transmitted to a signal analysis and processing module, and a timely alarm is given when a fault of the carrier roller is detected. A site warning device is arranged in a coal mine transportation site, and a PC monitoring terminal is arranged in a remote monitoring chamber. The mining conveyer carrier roller fault monitoring, positioning and warning device can achieve mining conveyer carrier roller fault monitoring, positioning and warning in a severe environment of coal mine production and has a higher application value.

The invention provides a water-dispersibility paprika red pigment micro emulsion and a preparation method thereof. The preparation method comprises steps that a surfactant is mixed with a cosurfactant, then an oil phase comprising paprika red pigment and edible oil is added, stirring is carried out and water is added so as to obtain a system, the system firstly becomes clear and then turbid, when the water is added to reach a certain quantity, the system suddenly becomes clear and transparent again, so as to obtain the water-dispersibility paprika red pigment micro emulsion, the mass percent content of the paprika red pigment in the micro emulsion reaches 1.98%-9.86%. The preparation method has the advantages that the pasty paprika red pigment is prepared into water-dispersibility paprika red pigment micro emulsion, so that the dispersibility of the paprika red pigment in the water and the stability of the paprika red pigment in the hot processing are improved; the preparation method is simple, low in production cost and beneficial for large scale production. The water-dispersibility paprika red pigment micro emulsion can be used in fluid food, semifluid food and high moisture food, and the application field of fat soluble paprika red pigment is enlarged.

The invention belongs to the technical field of solar cells, and particularly relates to a quantum dot solar cell and a preparation method thereof. The invention provides a quantum dot solar cell. Thequantum dot solar cell comprises a conductive substrate, an electron transport layer, a hole transport layer and an electrode layer which are stacked in sequence. The material of the electron transport layer is PbS-PbX2; wherein the PbS-PbX2 is a PbS quantum dot coated with an n-type lead halide ligand, and X is halogen; wherein the material of the hole transport layer is PbS-EDT, and the PbS-EDTis a PbS quantum dot coated with a p-type 1, 2-ethanedithiol ligand; and a p-n junction is formed between the hole transport layer and the electron transport layer. According to the quantum dot solarcell provided by the invention, the stability of the quantum dot solar cell and the utilization rate of ultraviolet light are improved on the basis of ensuring relatively good photoelectric conversion efficiency.

The invention discloses an electrochemical sensor based on CoCuCdTCPP coordination polymer modification and a preparation method and application thereof. The electrochemical sensor is prepared by dispensing a CoCuCdTCPP coordination polymer turbid solution on the surface of an electrode; the CoCuCdTCPP coordination polymer comprises a dual-metal CuCdTCPP and CoCdTCPP coordination polymer and a tri-metal system CuCoCdTCPP coordination polymer. The CoCuCdTCPP coordination polymer is applied to the electrochemical sensor for the first time; due to the fact that the electrochemical sensor formed by a plurality of metal active center modified electrodes of the CoCuCdTCPP coordination polymer can effectively and stably detect nitrous acid and sodium peroxide, the response time is short, the sensitivity is high, the cost is low, and preparation is easy.

The invention relates to a sodium houttuyfonate vaginal expansive suppository and a preparation method and a test method thereof. The expansive suppository comprises sodium houttuyfonate-containing matrix and an expansive carrier; in the sodium houttuyfonate-containing matrix, acid particles and alkaline particles generate carbon dioxide when meeting water, so as to foam, and in combination with the expansive action of the expansive carrier, sodium houttuyfonate can reach vaginal deep site and fold site to improve the drug action range; ascorbic acid in acid particles has an antioxidant effect to improve the stability of the suppository; buffer salt particles in the sodium houttuyfonate-containing matrix provide an appropriate pH environment which is in favor of the complete effervescence of the suppository and improves the bioavailability of sodium houttuyfonate in the suppository; the hollow effervescent vaginal suppository seals the drug-containing layer in the matrix hollow cavity, so as to improve the stability of the expansive suppository; the sodium houttuyfonate vaginal expansive suppository adopts six original advanced techniques, and has the beneficial effects of prevention of medicinal liquid from flowing out, high stability, lasting therapeutic effect, prevention of secondary infection, and so on.

The invention relates to the field of perovskite solar cell packaging, and provides a perovskite solar cell device and a packaging method thereof. The perovskite solar cell device comprises a glass substrate, a perovskite solar cell, an inert barrier layer, a cover plate and a cover plate packaging adhesive; the perovskite solar cell is arranged on the glass substrate, the inert barrier layer is arranged on the perovskite solar cell, and the cover plate is arranged on the inert barrier layer in a gapless fit mode through the cover plate packaging adhesive. According to the perovskite solar cell device and the packaging method thereof provided by the invention, the stability of the perovskite solar cell device under the combined action of high temperature (65-85 DEG C) and illumination can be remarkably improved by adopting a combined packaging mode of firstly packaging the inert barrier layer and then packaging the rear cover plate in a gapless fit manner.

The embodiment of the invention provides a display substrate, a preparation method thereof and a display device. The display substrate comprises a plurality of sub-pixels, at least one sub-pixel comprises a pixel driving circuit, and the pixel driving circuit at least comprises a first transistor serving as a driving transistor and a second transistor serving as a switching transistor; the channel of the first transistor comprises a plurality of sub-channels, and the channel length of the first transistor is the sum of the lengths of the plurality of sub-channels. According to the display substrate, the stability of the driving transistor can be improved, and the problem that a display substrate in the prior art is poor in transistor stability is solved.

The present invention provides lyophilized levofloxacin composition powder for injection, and relates to the technical field of drugs and drug production. The lyophilized levofloxacin composition powder comprises the following raw material components, by weight: 1.75-2.14 parts of esomeprazole sodium, 0.87-1.07 parts of chitosan nanoparticles, and 94.80-97.38 parts of water for injection. The lyophilized levofloxacin composition powder has the following advantages that: 1) the poor stability problem of the principal agent is overcome, and long-term storage is easily achieved; 2) the composition has an in vivo synergistic effect, can be provided for clinically treating stomach ulcers, gastroesophageal reflux diseases, duodenal ulcers and the like, and has a characteristic of rapid efficacy, and in vitro experiment results verify that the 40 mg of esomeprazole sodium containing the chitosan nanoparticles provides the same gastric acid secretion inhibition effect as the 60 mg of chitosan nanoparticle-free esomeprazole sodium; 3) the patient treatment period is shortened with the enhanced activity, such that the possibility of adverse reaction occurrence caused by esomeprazole sodium is reduced; and 4) the chitosan nanoparticles can be adopted to replace mannitol so as to be adopted as the lyophilized skeleton agent of the lyophilized powder injection, such that the activity effect of mannitol on human body is eliminated.