62results about How to "Avoid bacterial contamination" patented technology

A system and method for dispensing fluids is introduced. A preferred embodiment comprises a sealed tank, a bag containing fluid inside the sealed tank, an outlet for dispensing the liquid in the bag, and a pressure generating device to create pressure in the sealed tank.

The economic and practical artificial feed is suitable for scale feeding of beet noctuids to produce beet noctuids virus pesticide. It is produced by mixing the following materials: soybean powder 7-10 wt%, yeast powder 3-5 wt%, wheat bran 2-5 wt%, agar 1.5-3 wt%, proper amount of supplementary material and water. Feeding beet noctuids with the artificial feed can result in average chrysalis weight of 117.8 mg, eclosion rate of 99 %, high larva livability, normal growth of chrysalis and oviposition amount and egg incubation rate reaching those of natural feed. Being low in cost, practical andsimple in production, the feed of the present invention can meet the requirement of feeding beet noctuids in industrial scale.

The invention discloses a Chinese wampee enzyme drink and a preparation method thereof and belongs to the technical field of drink processing. The method for preparing the Chinese wampee enzyme drink comprises the following steps: by taking Chinese wampee leaves, Chinese wampee twigs and Chinese wampee fruits as raw materials, separating the pulp of the Chinese wampee fruits, and refrigerating the obtained pulp; pulping the peel, kernels with scraps of the Chinese wampee leaves and Chinese wampee twigs; adding water and cellulase powder for performing reaction decomposition, and fermenting by virtue of saccharomycetes; adding water and sugar, and inoculating lactic acid bacteria for fermenting; and separating the fermentation product, taking the clear liquor, mixing the pulp, sealing, and standing for over 7 days, thereby obtaining the Chinese wampee enzyme drink. According to the method disclosed by the invention, the Chinese wampee leaves and Chinese wampee twigs are fully utilized, batch production of high-quality Chinese wampee enzyme drink is realized, and the production process is mature and controllable; and meanwhile, the nutritional ingredients and tender shape of the Chinese wampee pulp are maintained, and rich nutrition and excellent taste are obtained.

A solid material adapted to kill bacteria in planktonic, spore and biofilm states is lethal toward a wide spectrum of gram positive and gram negative bacteria as well as other microbes. The solid material includes a significant amount of one or more surfactants entrained in a crosslinked polymeric network.

The invention relates to the technical field of sample containers, in particular to a sample storage device for medical examination. The sample storage device for medical examination comprises a heatinsulation box and a heat insulation box cover, wherein a sample storage block is arranged in the heat insulation box; a plurality of sample storage block fixing columns are fixedly connected to the bottom part of the sample storage block; the other ends of the sample storage block fixing columns are movably inserted to an inner bottom wall of the heat insulation box; sample fixing chambers are arranged in the sample storage block; limiting holes are formed in a left side wall and a right side wall of the sample storage block; a sterilization cover is matched above the sample storage block; aplurality of ultraviolet sterilizing lamps are arranged in the sterilization cover; one ends of connecting rods are hinged to the lower end of the sterilization cover; the other ends of the connectingrods are hinged with one ends of L-shaped rods; the other sections of the L-shaped rods are movably inserted into the limiting holes; and the heat insulation box cover is matched above the heat insulation box. The sample storage device for medical examination provided by the invention is simple in structure, can well overcome the defects that a sample is easy to shake and pollute during a movingor inspection waiting process, and higher in practicability.

A stable, self-preserving, antimicrobial, composition suitable for the treatment of a variety of dermal as well as subcutaneous conditions. The compositions include as an active ingredient a quaternary ammonium compound, preferably benzethonium chloride, potentiated and synergized with menthyl lactate cooling agent in a cationic carrier. Optionally, a phenoxyethanol preservative and chlorhexidine digluconate antibacterial agent may be used to assist in enhancing the activity. The compositions kill a broad spectrum of gram-negative and gram-positive bacteria, fungus and yeasts. The compositions are used as first aid skin treatments and as skin sanitizers to help prevent bacterial contamination of minor cuts, scrapes and burns. The compositions are particularly useful when applied to the skin after hair removal in that they additionally cool, soothe and moisturize the skin. The compositions may also serve as a base vehicle in which additional skin care ingredients may be added to provide additional functionality to the compositions.

The invention provides a bacillus licheniformis strain DW2 (pHY300-cysE) loaded with a serine acetyl transferase gene capable of producing at high yield, wherein the strain is preserved at the Typical Culture Preservation Centre in China in Wuhan, the preservation number is CCTCCNO:M2013402, and the preservation date is September 10, 2013. Application of the bacillus licheniformis loaded with the serine acetyl transferase gene cysE in bacitracin comprises the following steps: A, activating the strain; B, fermenting seeds; and C producing and fermenting. By adopting the bacillus licheniformis strain, the yield of the bacillus licheniformis is improved by 7%.

The invention provides graphene antimicrobial air conditioner filtering cloth, which comprises graphene composite non-woven fabric and buckles, wherein the graphene composite non-woven fabric comprises two graphene non-woven fabric layers; a graphene active carbon power filtering layer is clamped and arranged between the two graphene non-woven fabric layers. The graphene antimicrobial air conditioner filtering cloth has the advantages that 1, the multifunctional antimicrobial graphene air conditioner filtering cloth uses the graphene composite non-woven fabric, so that the functions of realizing an antimicrobial effect, removing PM2.5, formaldehyde and TVOC gas and the like are realized; the generation of secondary pollution caused by bacteria contamination in the long-period use process is avoided; 2, the graphene air conditioner filtering cloth uses the four-layer graphene composite non-woven fabric and buckle form; simplicity is realized; the operation is easy; the use efficiency ofan air conditioner is improved.

A coating process using an aqueous coating or aqueous rinse includes a step in which at least a part of the aqueous coating, aqueous rinse, and/or an aqueous component added to the aqueous coating or aqueous rinse is pasteurized. The pasteurization may be carried out continuously in a circulation loop of a tank containing the material or in a line carrying the material to a sprayhead.

The invention relates to a propagation method of stenoloma chusana spores, which comprises the following steps of: mature stenoloma chusana spore collecting, ground substance disinfecting, spore sterilizing, spore germinating, zygote forming, gametophyte growing, antiphyte growing, seedling transplanting and the like. The method can be used for fast propagating the stenoloma chusana, is simple in the preparation of the cultivation ground substance, is simple and convenient in operation method, is high in operability, and has the advantages of being small in investment and high in yield, so that the transplanting survival rate of the spore seedlings reaches more than 85%.

The invention relates to a separable air bag device for protecting an intestinal tract surgery field. An air bag core with side holes is fixedly arranged in an air bag; an air bag plug comprises a rubber plug arranged at an air inlet of the air bag core; a sleeve type air inflation needle comprises an outer sleeve, an air inflation needle head and an air inflation pipe, and the needle head and the air inflation pipe are arranged in the outer sleeve and can move relative to the outer sleeve; the needle head is used for penetrating through the rubber plug and injecting air into the air bag; the air inflation valve comprises an injector connecting port communicated with an air inflation pipe as well as an air inflation turning bolt which can control in-out of air; and after air inflation, the air bag can be separated, the surgery field of the lower section of an intestinal tract is not influenced. The device effectively guarantees the clean and sterile state of the lower section of the intestinal tract, protects the admission passage of an orifice transluminal endoscopic surgery and protects perforation parts from being polluted in the processes of endoscopic full-thickness resection for the intestinal tract and other intestinal tract surgeries, so that sterile surgery of the lower section of the intestinal tract becomes possible, and peritonitis after the surgery can be prevented.

A device and method for collection of a urine sample is disclosed which comprises a channel, an opening in the channel, and a collector associated with the opening. The channel is formed so that urine can flow through it from a first end to a second end thereof. The opening is provided in the channel at a point between the first and the second ends thereof. The collector is associated with the opening in the channel to be able to receive urine therein. In one embodiment, a member can cover the opening to permit urine to pass through it after contact with urine. Specifically, the member may dissolve or otherwise permit urine to pass through the opening after a period of time to test a urine sample which is not from the initial flow of urine to avoid bacteria contamination.

A water sampling device has a rigid body, a top lid, extension members, a horizontal member, a spring, a rod, at least one polymer membrane and a bottom lid. The top lid has a shaft attached to it and the shaft traverses through the horizontal member. The bottom lid is connected to the rod upon which the at least one polymer membrane is attached perpendicularly. The water sampling device undergoes two different stages of lid opening and closing while in operation of collecting water sample to concentrate diversified bacteria from different water depths. The top lid, the shaft and the spring co-operate with the rigid body and the horizontal member such that in a first state, the top lid seals the top end opening while in a second state allows fluid to flow to an inside portion of the rigid body.

The invention discloses a testing device and a testing method for an RO membrane filter core. The testing device comprises the components of a fixing frame which is used for fixing the RO membrane filter core; at least one air ventilating valve; a vacuum pumping device; at least one negative pressure vacuum meter; and a control device which is connected with the vacuum pumping device, the air ventilating valve and the negative pressure vacuum meter. The control device is used for opening the air ventilating valve and making the vacuum pumping device supply negative pressure to the RO membrane filter core. Furthermore on condition that a fact that a pressure value which is fed back by the negative pressure vacuum meter is a first preset pressure value is acquired, the control device performs controlling for closing the air ventilating valve. Furthermore on condition that the pressure value which is fed back by the negative pressure vacuum meter is not lower than a second preset pressure value after a preset pressure keeping time period, the control device reminds a tester of a fact that the RO membrane is qualified and the second preset pressure value is not larger than the first preset pressure value. According to the testing device and the testing method, an existing water testing mode is replaced by a negative-pressure air testing mode. Simple testing device structure is realized, and furthermore a problem of bacteria contamination to the RO membrane filter core is prevented.

The invention discloses a closed air sampling bottle, and relates to the technical field of microbiological detection, the closed air sampling bottle comprises a bottle body, an elution device and an electromagnet regulator, and sampling liquid is stored in the bottle body; the elution device is arranged on the outer side of the bottle body, the elution device comprises an eluent storage cavity in which eluent is stored and a movable cavity formed in the top of the eluent storage cavity, the eluent storage cavity is provided with a liquid outlet pipe, and the electromagnet regulator can move in the movable cavity; an isolating membrane is arranged between the movable cavity and the inner cavity of the bottle body; by means of the sampling bottle, collection of an air microorganism sample can be completed, nucleic acid extraction can be completed under the closed condition, the obtained nucleic acid extracting solution can be directly used for detection, infectious microbe pollution caused by tedious operation is avoided, aerosol pollution caused in the nucleic acid extraction process is also avoided, operation is easy, and the detection process of air microorganisms is accelerated. In addition, the closed air sampling bottle can be used as a disposable sampling bottle for production, so that sample pollution caused by repeated utilization is avoided.

The invention discloses a cadmium sulfide quantum dot biosynthesis method, prepared cadmium sulfide quantum dots and application of the cadmium sulfide quantum dots. The biosynthesis method comprisesthe following steps of by taking sulfur-containing amino acid as an S source, water-soluble cadmium salt as a Cd source, smCSE as a biocatalyst and protease as a reaction terminator, performing synthesis to prepare the cadmium sulfide quantum dots, and applying the cadmium sulfide quantum dots prepared in the step to the field of cell labeling. Compared with the prior art, the synthesis method provided by the invention is environmentally friendly and is strong in controllability; and the cadmium sulfide quantum dots prepared by the method is regular in shape, high in yield and good in stability and can be used for cell labeling or chemical detection.