8results about How to "For long-term storage" patented technology

The utility model belongs to the technical field of tea storage container, and disclose a kind of earthen jar of tea is stored easily, including earthen jar body and sealing jar cover, the one side of earthen jar body is integrally formed with arc handle, the other side of earthen jar body is provided with protective seat, the inner chamber of protective seat is equipped with micro air pump, one end of micro air pump is connected with suction pipe, one end of suction pipe is connected on the outer wall of earthen jar body, the position corresponding with suction pipe on earthen jar body is provided with check valve, the other end of micro air pump is connected with exhaust pipe, exhaust pipe extends to the outside of protective seat, the sealing jar cover of the utility model is pasted with frosted opening and the inlaying of annular block and annular groove by embedding block, improve the sealing effect of earthen jar body, while micro air pump can quickly extract air in jar, create low oxygen, micro negative pressure environment, inhibit the oxidation speed of tea polyphenols, amino acid and other nutrients in tea, facilitate long-term storage of tea.

This utility model discloses an additive anti-precipitation storage device, including a tank, a magnetic centrifugal pump, and a variable frequency motor. The first end of the magnetic centrifugal pump is connected to a first pipe and a second pipe. The other ends of the first and second pipes are respectively connected to the upper and middle inner sides of the tank. The second end of the magnetic centrifugal pump is connected to a third pipe. The other end of the third pipe is connected to the lower inner side of the tank. Each of the first, second, and third pipes has a nozzle at its end away from the magnetic centrifugal pump. The nozzle on the first pipe is arranged tangentially to the tank. This utility model can, as needed, use the centrifugal pump to draw additives from the bottom of the tank and spray them from the top to flush the additives on the sidewalls of the tank, forming a top-to-bottom positive flow; or it can draw additives from the middle of the tank and spray them from the bottom, thereby agitating the heavy sediment at the bottom of the tank and facilitating long-term storage of the additives.

This invention belongs to the field of inorganic material preparation and relates to a method for preparing flower-shaped basic copper nitrate. The method is characterized by: (1) preparing a copper nitrate solution with a concentration of 0.1-0.6 mol / L; (2) using triethanolamine as the only amine morphology regulator and complexing agent at a speed of 200-500 rpm, adding triethanolamine with an initial concentration of 0.2-0.4 mol / L to the copper nitrate solution, stirring the reaction at 30-70℃ for 0.5-3.0 h, and controlling the pH of the mixed solution between 4.0 and 7.0; (3) after the reaction, the precipitate is not aged and allowed to stand, and is directly washed by centrifugation with deionized water and ethanol more than three times, and dried to obtain flower-shaped basic copper nitrate. The beneficial effects of this invention are: a basic copper nitrate with good dispersibility, regular shape and good stability is prepared by a one-step precipitation method. It has the advantages of simple synthesis steps, mild reaction conditions and green environmental protection, and is suitable for industrial production.

The application discloses a manganese-doped Cu7S4 nanomaterial and a preparation method and application thereof. The manganese-doped Cu7S4 nanomaterial comprises a Cu7S4 nanomaterial and manganese elements doped in the Cu7S4 nanomaterial, and the manganese-doped Cu7S4 nanomaterial has an enzyme-like catalytic performance. The preparation method comprises the following steps: reacting a mixed reaction system containing Cu2O, polyvinylpyrrolidone, a manganese salt and a hydroxide to obtain a Cu2O / Mn(OH)2 composite; and then reacting NaHS to obtain the manganese-doped Cu7S4 nanomaterial. The manganese-doped Cu7S4 nanomaterial provided by the application has a unique and novel structure, higher enzyme-like catalytic effect, high stability, long-term storage, and is beneficial to clinical application of tumors, and the preparation method is simple and easy to implement, low in cost, universal and beneficial to large-scale production.

This utility model discloses a tilting wine pourer for convenient storage, including two sets of bottle necks connected by a connecting strap. The lower inner surface of each bottle neck features a quick-release sealing connection structure for improved ease of installation and fixation. This tilting wine pourer, with its quick-release sealing connection structure and dual structure of rubber sealing rings and threaded connections, allows for rapid assembly and disassembly of the pourer from the bottle while ensuring a tight seal at the connection point, reducing contact between the wine and air and facilitating long-term storage of any remaining wine. The dual-branch design with air vents not only allows for simultaneous pouring of two bottles of wine for easy mixing but also balances the internal and external air pressure of the bottle, preventing splashing or interruption of pouring due to pressure imbalance. It also regulates the flow rate, allowing for optimal mixing of two different liquids at different flow rates, making the pouring process smoother and more convenient.

This invention provides a quality control product, application, and kit for the detection of Plasmodium falciparum nucleic acid. The quality control product contains an engineered Escherichia coli bacterium carrying a genetically engineered recombinant artificial chromosome. The artificial chromosome integrates a target fragment containing the full-length sequence of the Plasmodium falciparum 18S rRNA gene. The full-length sequence of the Plasmodium falciparum 18S rRNA gene is a characteristic homologous sequence of Plasmodium falciparum, as shown in SEQ ID NO:1, which is artificially designed and selected. The quality control product of this invention has better stability and is easy to store. It is not only suitable for PCR detection methods such as real-time quantitative PCR and digital PCR, but also for other types of nucleic acid detection methods, demonstrating broad applicability.

This invention relates to a novel methicillin-resistant Staphylococcus aureus (MRSA) bacteriophage and its applications. The invention provides a methicillin-resistant MRSA bacteriophage SP01, which is identified as a new species. This phage possesses highly efficient lytic ability against MRSA and has a broad host spectrum, showing sensitivity to multiple clinical isolates. Furthermore, phage SP01 exhibits excellent environmental stability, maintaining good activity within a temperature range of 4–40°C and a pH range of 7–11. In summary, this invention allows for the preparation of drugs, disinfectants, and bactericides for treating MRSA infections using phage SP01, addressing the problem of conventional antibiotic ineffectiveness and demonstrating broad application prospects.

This invention relates to the field of water pollution detection technology, specifically to a method for preparing quantum dot fluorescent probes for online monitoring of comprehensive water toxicity. The method uses L-histidine and levofloxacin as raw materials, and through hydrothermal reaction, centrifugation, dialysis, pH adjustment, filtration, and freeze-drying, prepares histidine-modified carbon quantum dot fluorescent probes (His-CQDs), which are further formulated into a working solution. The histidine is used to simulate key toxicity recognition sites in the luciferase system of luminescent bacteria, enabling the His-CQDs to produce fluorescence quenching responses to heavy metal ions and fluorescence enhancement responses to organic pollutants, thereby achieving online monitoring of the comprehensive toxicity of the water sample. During detection, the working solution is mixed with the water sample, and the fluorescence intensity is measured. The water toxicity evaluation result is obtained by calculating the fluorescence change rate. This invention achieves a materialized simulation of the toxicity recognition mechanism of luminescent bacteria, and has the advantages of fast response, good stability, and suitability for online monitoring of comprehensive water toxicity.