31results about How to "Improve freezing ability" patented technology

The invention discloses a streptococcus thermophilus freeze-drying protective agent and a preparation method thereof. The streptococcus thermophilus freeze-drying protective agent comprises the following components in parts by mass: 10-20 parts of dried skim milk, 3-10 parts of raffinose, 4-10 parts of soybean oligosaccharides, 1.05-5.0 parts of dextran D40, 0.3-0.8 parts of sodium tripolyphosphate, 0.005-0.02 parts of propylgallate and 100 parts of distilled water, wherein the soybean oligosaccharides and the dextran D40 can both be purchased from LUOSHENBO science and technology Ltd.. The anti-freezing ability of thallus can be increased by adding a freeze-drying protective agent during a thallus powder preparing process, thus the freeze-drying survival rate of the thallus powder can be increased, the storage period can be longer, and the survival rate can not be easily lowered.

The invention discloses a pipe casing type heat exchanger which comprises a casing, a heat exchange pipe arranged in the casing and sealing heads arranged at two ends of the heat exchanger. An inside-pipe fluid inlet and an inside-pipe fluid outlet are arranged on the sealing heads, and an outside-pipe fluid inlet and an outside-pipe fluid outlet are arranged on the casing. Two ends of the heat exchange pipe are connected with a pipe plate, the heat exchange pipe is a pipe bundle composed of at least one transformation pipe, and the transformation pipes are mutually contacted in a certain distance to form a self-support structure. The pipe casing type heat exchanger is capable of achieving the effect that fluid inside and outside the pipes flows in parallel. The heat exchanger has the advantages of being high in heat exchange efficiency, small in resistance, not apt to scaling, small in vibration and the like.

The invention relates to a material for preventing freezing damage on the surface of concrete products, which is made of hydroxyl silicone oil, γ-aminopropyltriethoxysilane, crosslinking agent, hexamethyldisilazane and dibutyltin dilaurate to make. Add hydroxyl silicone oil, γ‑aminopropyltriethoxysilane, and crosslinking agent into the reaction kettle in sequence, start stirring, heat up, open the vacuum valve, start vacuuming, and then add hexamethyldisilazane and di Add butyl tin dilaurate into the reaction kettle in turn, continue the vacuum reaction, and finally put the product in cans and store it sealed under the protection of nitrogen to obtain the material for preventing freezing damage on the surface of finished concrete products. The material has small molecular weight, strong permeability, and can maintain good elasticity in the temperature range of 50°C-200°C. It has excellent weather aging resistance, high and low temperature resistance, and can improve the weather resistance of concrete products. When in use, the material is sprayed or painted on the surface of concrete products, which can effectively improve the anti-freeze damage performance of the surface of concrete products.

The invention relates to a stuffing material of roasted food which comprises the following components (by weight ratio): granulated sugar 10-30%, modified starch 0-11%, hydrophilic colloid 0.1-0.6%, distilled glycerin monostearate 1-5%, potassium sorbate 0.01-0.1%, edible water-loss reducer 5-30%, edible essence or edible pigment or their combination 0.2-0.5%, and balancing water whose content isnot higher than 50%. The stuffing material has good flowability, water-holding ability and freeze-resisting property.

The invention belongs to the technical field of unmanned aerial vehicles, and discloses a high-altitude flight antifreezing system of an unmanned aerial vehicle. The system comprises heating structures, power supply batteries, a vehicle-mounted controller, a wireless transreceiver module and a ground remote control terminal, wherein the heating structures are connected with the power supply batteries through control switches to obtain electric energy to generate heat, and are distributed on windward sides of wings and empennages of the unmanned aerial vehicle; the control switches are connected with the vehicle-mounted controller to control the power supply of the heating structures; and the vehicle-mounted controller communicates with the ground terminal control terminal through the wireless transreceiver module. The system is provided with the heating structures on the wings and the empennages of the unmanned aerial vehicle to deal with the problem of freezing of the windward surfaces in the high-altitude flight so as to prevent the freezing from influencing the aerodynamic configuration and causing signal transmission distortion; and meanwhile, a remote control communication mechanism is established to realize flexible deicing and antifreezing control and prevent freezing.

The invention provides a super-hydrophobic aluminum material / zinc material and a preparation method and application thereof. The method comprises the following steps of sequentially washing the aluminum material / zinc material in acetone and alcohol through an ultrasonic way to obtain a part to be processed; placing the part to be processed in the previous step in the water at the temperature of 50DEG C to 100DEG C for 0.5 to 4h; and further carrying surface energy substance decoration treatment for the part to be processed obtained in the previous step. The super-hydrophobic aluminum material prepared by the method has a nano flaky silk-shaped surface structure, the prepared super-hydrophobic zinc material has a nano compact coarse protruded surface structure, a contact angle of water drop on the surface of the aluminum material / zinc material is 140DEG to 170DEG, and a rolling angle is less than 10DEG C. The method is simple in process, good in repeatability and low in cost. The super-hydrophobic aluminum material / zinc material is applicable to the outer wall of a pipeline, the surface of ships or the outer wall of an electric wire, capable of effectively improving the hydrophobicity, self-cleaning property and anti-freezing property and prolonging the service life.

The invention provides a lactobacillus acidophilus anti-freeze culture medium and an application method thereof. The culture medium includes the following components by weight: 16-20 g of glucose, 0.4-0.8 g of fructus tribuli polysaccharide, 3-5 g of yeast extract, 4-6 g of sodium chloride, 0.3-0.5 g of mannitol, 0.8-1.2 g of sodium glutamate, 8-12 g of soybean peptone, 0.5-2.0 g of diammonium hydrogen citrate, 0.2-0.5 g of betaine, 1.0-2.5 g of dipotassium phosphate, 0.1-0.2 g of MgSO4, 0.5-1.0 ml of Tween-80 and 1,000 ml of distilled water. The culture medium has the advantages that: after lactobacillus acidophilus is cultured by using the anti-freeze culture medium, the freeze-dry survival rate of the lactobacillus acidophilus can reach up to 79.54 percent, and viable count of fungal powder reaches up to 4.09*10<11> cfu / g; and the lactobacillus acidophilus MRS (de Man, Rogosa and Sharp) broth is used for culture, so that the freeze-dry survival rate of the prepared fungal powder isonly 49.72 percent, and the viable count is only 1.24*10<11> cfu / g.

The present invention relates to one kind of stuffing for roasted food and its preparation process. The stuffing consists of sugar 10-30 wt%, modified starch 0-11 wt%, hydrophilic colloid 0.1-0.6 wt%,steamed monoglyceride 1-5 wt%, potassium sorbate 0.01-0.1 wt%, food water preserver 5-30 wt%, edible essence and / or edible color 0.2-0.5 wt%, and water for the rest, with water content being less than wt%. The stuffing has the synergistic effect of colloid and modified starch, high flowability, high water preserving capacity, high freezing resistance and stable quality, and the roasted food withthe stuffing has good taste.

The invention discloses a method for improving the in vitro fertilization effect of thawed swine sperm without treating infertility, comprising the following operation steps: (1) taking out the frozen semen and then thawing it; (2) using the thawed semen with The fertilization operation solution was washed and centrifuged twice, and then the centrifuged sediment was washed and centrifuged once with mTBM capacitative solution, and then resuspended and cultured to obtain capacitative semen; (3) The ovary from which the follicular fluid was extracted was used to pick out the cumulus-egg under a microscope Mother cell complex, take out the oocyte after culturing, and remove the cumulus; (4) add capacitative semen to each fertilization droplet, put it in the incubator and wash off the sperm attached to the oocyte, and in vitro fertilization Cultivation is complete. In the present invention, the corresponding concentration of caffeic acid phenethyl ester and polyvinylpyrrolidone are combined in the freezing base solution I, and the synergistic effect of the two can effectively improve the vitality, plasma membrane integrity rate and DNA integrity rate of thawed pig sperm. Thus, the in vitro fertilization effect of thawed porcine sperm is improved.

The invention discloses a lactobacillus bulgaricus freeze-drying protecting agent and a preparation method thereof. The lactobacillus bulgaricus freeze-drying protecting agent comprises the following components in parts by mass: 20-30 parts of lactose, 20-30 parts of dried skim milk, 3-5 parts of sodium ascorbate, 0.2-0.6 part of polyethylene glycol 4000, 0.2-0.8 part of polyvinylpyrrolidone, 0.5-2.0 parts of bovine serum albumin and 100 parts of distilled water. The freeze-drying protecting agent is added in a powder preparation process, so that the anti-freeze capacity of the thalli can be improved, thereby improving the freeze-dry survival rate of the powder and guaranteeing long storage period and low probability for reduction of the survival rate.