49results about How to "Simple storage conditions" patented technology

The invention discloses a novel gas-producing photoacoustic imaging contrast agent and a preparation method thereof, belonging to the field of clinical medicine. A new type of gas-producing photoacoustic imaging contrast agent, the photoacoustic contrast agent includes a solution, microspheres and gas, the solution is a saturated solution of ammonium bicarbonate, wrapped in the microspheres; the microspheres are lipid Plastid microspheres, the formula of the liposome microsphere wall is: polyethylene glycol-distearoylphosphatidylethanolamine, dipalmitoylphosphatidylcholine, cholesterol; the present invention has the following advantages: adopt bicarbonate Ammonium saturated solution is not only safe, effective and reduces production costs; it can be used for photoacoustic imaging of superficial tissues; the produced microspheres are stored at low temperature; the membrane material is non-toxic and has no side effects; the microspheres have small particle size, stable performance and excellent imaging effect Good; does not affect systemic or systemic hemodynamics.

The present invention relates to a safe and stable monosialotetrahexosylganglioside sodium preparation, which is an infusion, wherein per 1 ml of water for injection contains less than 5 g of the monosialotetrahexosylganglioside sodium. The monosialotetrahexosylganglioside sodium preparation has characteristics of high clarity, good main drug solubility, high stability, no safety risk during a use process, simple storage condition, easy long-term storage, convenient clinical use, secondary pollution avoiding, and substantially convent acute patient use.

The present invention relates to the technical field of biological control of agricultural pests, in particular to a method for artificial seed conservation and breeding of tobacco powder borer, which can provide insect sources in time, and then provide a large number of hosts for the breeding of natural enemy insects, which is helpful for exploring the adaptation of insects to the environment Mechanism; including the following steps: (1) equipment preparation; (2) laying the tobacco leaf layer; (3) selecting robust host larvae; (4) laying in layers: place the tobacco powder borer larvae evenly on the tobacco leaves in the plastic box, and place the density About 0.5 strips / cm 2 , Repeat steps (2) and (3) after each layer is full, until it is 1cm away from the box opening, spread tobacco leaves on the top layer, and close the box cover; (5) Store in the refrigerator; (6) Restore vitality; (7) Pupation: put the surviving larvae of Tobacillus moth into larvae cages and feed them until the larvae of Tobacillus melanogaster pupate normally to obtain pupae of Tobacillus moth; (8) Eclosion; (9) Egg mass collection and hatching; (10) Larval feeding.

The invention discloses a preservation method of trace divalent sulfide ions in a water sample. The preservation method comprises the following operating steps: collecting a water sample containing divalent sulfide ions, immediately adding sodium hydroxide into the water sample until the concentration of hydroxy radicals in the water sample reaches 0.1-0.2 mol / L, and leaving to stand for no more than 24 h' s preservation at the room temperature. The invention further discloses an automatic analysis method of trace divalent sulfide ions in the water sample; the automatic analysis method uses analytical instruments comprising a first low pressure pump, a second low pressure pump, an injection valve, a first mixer, a second mixer, a reactor, an optical flow-through cell, an optical detector and a computer processing system and further comprises the following steps: (1) determining a base line; (2) determining a spectrogram of divalent sulfide ions in a test sample; (3) drawing a standard work curve; (4) calculating the concentration of divalent sulfide ions to be measured in the test sample according to the peak height value of the spectrogram of the divalent sulfide ions and the regression equation of the working curve. According to the preservation method and the automatic analysis method of trace divalent sulfide ions in the water sample, provided by the invention, preservation operations of divalent sulfide ions in the water sample are simplified, and low-cost automatic analysis of divalent sulfide ions is also realized.

The invention discloses a method for rapidly detecting whether pH value of an ammonium nitrate solution in the preparation of emulsion explosive is qualified, and belongs to the technical field of explosive manufacturing. The method of the invention comprises the following steps: (1) an ammonium nitrate solution to be measured is fetched and divided into several parts, a dimethyl yellow indicatoris added into a first part, and a bromocresol green indicator is added into a second part; and (b) whether pH value of the ammonium nitrate solution to be measured is qualified is judged according todiscoloration situation of the solution to be measured; when the first part of solution to be measured turns orange and the second part of solution to be measured turns yellow-green, it shows that thesolution to be measured is qualified; otherwise, the solution to be measured is unqualified. According to the invention, whether pH value of the solution is within a reasonable range is convenientlyjudged. By the method, cost is reduced, work efficiency is further raised, and new thinking is provided for on-line monitoring of pH value.