45results about How to "Effective in keeping fresh" patented technology

The invention discloses an essential oil nano emulsion emulsified by xanthan gum. The essential oil nano emulsion mainly consists of the following components in percentage by volume: 1 to 20 percent of composite oil phase taking clove essential oil as a main component; 60 to 78 percent of a xanthan gum solution; and 15 to 23 percent of a starch octenyl succinate solution. The invention also provides a preparation method and application of the essential oil nano emulsion emulsified by xanthan gum. The nano emulsion can play a role in preserving fresh-cut fruits and vegetables, and particularlycan solve the problems of easy rot and browning of fresh-cut apples in the prior art.

The invention relates to a preservation method for large traditional Chinese medicinal materials. The method comprises the following steps: preparing a fibroin solution with the concentration of 0.1%-10%; pretreating the traditional Chinese medicinal materials to be preserved; spraying the silk protein solution on the surfaces of the traditional Chinese medicinal materials through a spraying device until the silk protein solution completely covers the traditional Chinese medicinal materials; and drying the sprayed traditional Chinese medicinal materials. Thus, the large traditional Chinese medicinal materials can be effectively preserved, meanwhile, the protein film for preserving the large traditional Chinese medicinal materials has the advantages of being safe, non-toxic, cleanable, biocompatibility, biodegradability and the like, and the problems that in the prior art, environmental pollution is serious, the protein film is harmful to the human body, and the preservation effect is not ideal can be solved.

The invention discloses a litchi low-temperature plasma sterile controlled atmosphere preservation method. The method comprises the following steps: S1, picking fresh litchis in the morning, removingfruits with plant diseases and insect pests, damaged fruits, small fruits and dried fruits, putting the fruits into a controlled atmosphere fresh-keeping bag, and performing pre-cooling on the fresh litchis in a refrigeration house; S2, after pre-cooling, taking out the litchis together with the controlled atmosphere fresh-keeping, performing sealing on the controlled atmosphere fresh-keeping bag,and sending the sealed controlled atmosphere fresh-keeping bag into a plasma treatment closed chamber for low-temperature plasma treatment; and S3, transferring the litchis subjected to low-temperature plasma treatment and the controlled atmosphere fresh-keeping bags into a refrigeration house for storage, and regularly transferring the litchis into a plasma treatment closed chamber for low-temperature plasma treatment. The litchi preservation method breaks through the current situation of mainly depending on chemical treatment for a long time and other situations of poor physical treatment effect in litchi preservation, the low-temperature preservation period of litchis is greatly prolonged on the basis of the physical preservation technology of combining low-temperature plasma with sterile controlled atmosphere packaging, and effective preservation of litchis is achieved.

The invention provides a degradable antibacterial composite preservative film and a preparation method of the film. The method comprises the following steps of: step 1: manufacturing a PVA (polyvinylalcohol) film from PVA by a flow casting film formation method, step 2: preparing a mixed solution from chitosan / beta-cyclodextrin / glycerol, and adding thyme essential oil into the mixed solution, andstep 3: spreading the mixed solution prepared in step 2 on the PVA film and preparing the preservative film by the flow casting film formation method at last. The composite antibacterial preservativefilm prepared by the method is safe, nontoxic, healthy and environment-friendly, has good mechanical properties and higher permeability and barrier properties, is applied to bacterial inhibition andfresh preservation of fruits and vegetables, can effectively inhibit bacteria and achieve a good fresh preservation effect, and solves a series of environmental problems and human health problems caused by the existing physical methods and chemical methods for the fresh preservation of the fruits and the vegetables.

The invention discloses an air conditioning control method of a refrigerator, an air conditioning drawer and a fresh-keeping refrigerator. Wherein, the method includes: monitoring the oxygen concentration of the drawer and the pressure difference inside and outside the drawer when the drawer is closed; controlling the opening and closing of the vacuum pump in the nitrogen-oxygen separation membrane module and the air pipe The opening and closing of the air intake hole of the road channel. The invention realizes the linkage control of the nitrogen-oxygen separation membrane module and the air inlet switch of the air pipeline channel, which can not only adjust the gas concentration of the drawer to effectively keep the refrigerated food fresh, but also solve the problems of drawer deformation and negative pressure, so that The drawers are easy to move and secure.

The invention provides a dark-colored septated endophytic fungus on blueberry roots and its application, belonging to the field of microbial technology applications. The blueberry root dark septal endophyte (DSE) strain is specifically Pezicula sp.FLR13, and the preservation number is GDMCC No.60777. The strain has potential application value in promoting blueberry growth and enhancing plant disease resistance in blueberry cultivation, and at the same time, the strain promotes freshness of blueberry fruit. In addition, the strain can antagonize Sclerotinia sclerotiorum, and has a good effect on promoting tomato seed germination and root growth.

The invention belongs to the technical field of logistics transportation packing boxes, and particularly relates to a packing box for frozen food logistics transportation. The packing box comprises anouter box body and an inner box body. The inner box body is connected with the inner wall of the outer box body by springs. An outer box cover is arranged on the outer box body. An inner box cover isarranged on the inner box body. An annular sliding groove is formed in the inner wall of the inner box body. A first piston plate is slidably mounted in the sliding groove. Dry ice is mounted in a cavity below the first piston plate. Two air cylinders are symmetrically arranged on the outer wall of the inner box body in a left and right mode. A cavity on the first piston plate communicates with the air cylinders by pipelines. Piston rods of the air cylinders drive racks in the inner box body to move. Two second connecting rods are symmetrically hinged to the lower surface of the first pistonplate in a left and right mode. Gears are fixedly connected to the lower ends of the second connecting rods. The gears are engaged with the racks. Cold air bags wrapped in elastic materials are arranged on the upper half part of the inner box body. The cold air bags communicate with the cavity below the first piston plate by pipelines. The pipelines are internally provided with one-way valves usedfor feeding air into the cold air bags unidirectionally.