260 results about "Microbiological contamination" patented technology

A treatment process for preserving a food or food product against microbiological contamination, which improves the quality of such food and enhances the safety of food and food products for consumption by mammals, especially humans. The process utilizes a treatment of food or food products, or packaged food or food products, with a high pressure gas treatment process (HPP) to provide a reduction of the level of microorganisms or spores on and in such foods or food products. The method includes exposing the food or food product to a gas and/or injecting a gas into a container containing the food or food product; optionally, closing or sealing the container; and subjecting the food or food product and/or the container containing the food or food product to a temperature of less than about 50° C. and, concurrently, to more than one pressure treatment cycle at a pressure of at least about 10,000 psig. Alternatively, the HPP treatment method may instead substitute, or be combined with, one or more pressure treatment cycles at a pressure of less than about 250 psig. Optionally, the food or food product may be packaged before or after the HPP treatment. The food or food product is generally contacted with the gas under pressure conditions for a time sufficient to substantially sanitize or disinfect the food or food product following depressurization.

Subject matter of the invention is the procedure and plant for industrial wastewater and/or drinking water treatment by means of electrochemical methods and advanced oxidation processes. The preparatory phase of gravitational sedimentation is followed by main treatment consisting of electrocoagulation, electrooxidation and electroflotation through action of metal electrode sets made of inox, steel and aluminium respectively, with parallel disinfection/oxidation with ozone, UV irradiation and ultrasonic treatment, as well as recirculation in the electromagnetic field. At the end of the main treatment, the mixture of floccule and water is subject to coagulation/flocculation by electrochemically generated steel and aluminium floccule with slow infusion of ozone. The next phase is separation of sediment from clean water which is discharged through sand and activated charcoal filters for the purpose of removal of light floating floccule in the collection tank. If required, the water is subject to oxidation with simultaneous action of UV irradiation and ozone for the purpose of final destruction of organic matter and ammonia, and potential residues of microbiological contamination.

The invention provides a film forming compound with modified starch as the main component, a film forming material containing the compound, and more particularly a hard-shell natural capsule made from the compound. The compound contains no or very little animal protein such as gelatin, etc. The compound can partially or completely replace the gelatin from animals for producing natural hard-shell capsules. The prepared natural capsule shell product has the advantages of excellent film forming property, high strength, good flexibility, high transparency, decomposability and microbial pollution resistance. The main component of the compound, modified starch, has stable quality and highly controllable performance.

A composition for and methods of preserving a topical cosmetic, toiletry or pharmaceutical formulation against microbiological contamination or growth are described in which the compositions used herein include at least one hydroxamic acid, salt or complex thereof, and the methods include addition of an effective amount of such compounds to a cosmetic, toiletry or pharmaceutical formulation. Compositions further including alkanediols and/or solubilizing agents in blends with hydroxamic acid are also described.

This invention relates to a method, process and apparatus for disinfecting and sterilizing all types of surfaces contaminated with microorganisms and toxic substances to render both inactive. Furthermore, this invention relates to both a method and apparatus for disinfecting and/or sterilizing breathable air and then using this air to protect a confined space from external contamination. The apparatus consists of a new ultra-violet (NUV) source that is more effective than mercury based 254 nm light for destroying DNA of virus, bacteria, spores and cists. It is most effective in breaking chemical bonds in toxic gases and Biotoxins that are useful to terrorists. It is combined with other apparatus that remove particulates and byproducts sometimes produced by the NUV source and maintains positive pressure of the confined space so as to prevent the influx of air from outside the protected zone.

The invention discloses a refreshing method of bolete, belonging to the technical field of edible fungi refreshment. The refreshing method comprises the following steps of: carrying out pre-cooling treatment and sortation on bolete that is just picked, then putting into preservative pre-cooled at the temperature of 2 DEG C and soaking, draining moisture on the surface of the thallus and air-drying the surface, and finally sub-packing in refreshing bags and storing under the temperature of 0 to 3 DEG C. The method can ensure that the bolete keeps original flavor for a long time with the refreshing time up to more than one mouth; the problems of microbiological contamination, decay, ageing, and the like can not occur in the storage process and provide materials for further processing the bolete; and besides, the invention has simple method and low cost.

The invention provides a recombinant human basic fibroblast growth factor gel without a bacteriostatic agent. The recombinant human basic fibroblast growth factor gel comprises the following components: 1*10<6> to 9*10<6> IU of recombinant human basic fibroblast growth factors, 0.01 to 5.0 g of albumen stabilizers, 0.1 to 20.0 g of thickeners, 0.1 to 10.0 g of pH regulators, 0.1 to 10.0 g of buffering agents and 0.1 to 50.0 g of humectants, and water for injection is added to a constant volume of 1000 ml. The invention further provides a preparation method of the recombinant human basic fibroblast growth factor gel without the bacteriostatic agent. The recombinant human basic fibroblast growth factor gel without the bacteriostatic agent is disposable, so as to prevent eyes from being stimulated by the bacteriostatic agent and avoid microbial contamination which possibly occurs in the processes of use and storage.

The invention discloses an ABO, RhD blood typing reagent card, a preparation method thereof and an antibody diluting solution adopted in the preparation method. In the preparation method, the pH value of a system is maintained by virtue of a sodium phosphate buffer system, tween 80 is added, the component of a gel preservation solution is removed, and proper lubrication capability can be obtained when erythrocyte passes through the gap of gel, so that unaggregated erythrocytes have the capability of passing through gaps of gel particles, and aggregated erythrocytes cannot pass; nonspecific adsorption of the gel is eliminated by adding bovine serum albumin to protect the titer of the antibody; microbial contamination is reduced by adopting sodium azide, the preservation period of the product is prolonged, and blood typing error caused by microbial contamination is eliminated; and the gel is screened in the preparation process, and the gel raw material which is obtained by virtue of screening is required to be swelled, wet heat sterilization and cleaning, so that microbes contained in the gel are eliminated, the components of the gel preservation solution and broken gel particles are eliminated, and the product quality is greatly improved.

The present invention is generally directed to methods for reducing microbial population on food, especially seafood, during processing. Provided are methods of seafood processing that involve contacting seafood with a disinfection composition comprising an acid, a buffer, and an antimicrobial metal. Such methods can result in reduced pathogen load, reduced spoilage odor, and prolonged shelf-life of seafood. Also provided are systems for seafood processing employing said disinfectant compositions.

An instrument and method for ascertaining a viable aerobic microbe count at t_o employing a two-point calibration curve of t_threshold to TVC for each type of sample. One point on the calibration curve is the x-intercept value (i.e., an estimated or experimental value for the logarithm of the minimum viable aerobic microbe count at commencement of testing (t_o) in a sample effective for causing the sample to reach t_Threshold substantially instantaneously upon commencement of incubation). The other point is ascertained experimentally from a sample having a smaller known viable aerobic microbe count at t_o.

A method of controlling microbial contamination of poultry carcasses in the processing of poultry as food products is described. The method comprises contacting the carcasses with an aqueous medium containing an effective microbial inhibiting amount of active bromine resulting from the addition to the medium of (i) at least one 1,3-dibromo-5,5-dialkylhydantoin in which one of the alkyl groups is a methyl group and the other alkyl group contains in the range of 1 to about 4 carbon atoms or (ii) a solution thereof, or (iii) both of (i) and (ii). Such contacting inhibits contamination of the carcasses by microorganisms, even at least some bacteria that are resistant to antibiotics or antibacterials. Also described are improvements in a poultry chill tank containing an aqueous medium and a plurality of poultry carcasses in contact with the medium. Such improvements result from the presence in the medium of an effective microbial inhibiting amount of active bromine in the medium, which amount results from the addition to water before it enters the tank or while it is in the tank, or both, of (i) at least one of the above 1,3-dibromo-5,5-dialkylhydantoins, and/or a solution thereof.

The present invention provides a culture medium and a culture method for colorectal cancer organoids. The culture medium comprises a basic culture medium Advanced DMEM/F12, specific additive factors and sterile water; wherein a mass ratio of the basic culture medium Advanced DMEM/F12 to the sterile water is 99:1; and the specific additive factors comprise B27 without vitamin A, N-acetylcysteine, EGF, Noggin, R-spondin 1, Wnt3a, CHIR99021, thiazovivin, Gastrin I, a penicillin-streptomycin mixture and Primocin. The culture medium is used to culture the colorectal cancer organoids, can maintain morphological structures and genetic characteristics of primary tissues, effectively reduces risks of microbial contamination in colorectal cancer culture, and improves success rate and survival rate of colorectal cancer organoid culture.

The present invention describes a formulation and dispensing methodology for liquid spice that can be used as a volume-for-volume replacement for traditional herbs and spices with a flavor true to the fresh herb or spice. This formulation gives a product free of microbiological contamination without the need for chemical or radiation-based disinfection. The formulation uses a natural-product extraction of fresh or dried herbs or spices, diluted with carriers such as a nutritive oil, ethanol, propylene glycol, or water (or a combination or combinations of the above). The resulting solution can either be used as-is or filtered to provide optimum clarity. The resulting concentration of the flavor component in the carrier is standardized to provide a flavor comparable to a fresh or dried herb or spice. The present invention further provides for convenient delivery of the formulated liquid spice to displace traditional measuring practices.

The invention relates to a method for prolonging the shelf life of fresh-cut fruits and vegetables by treatment of medium-pressure mixed inert gases, and belongs to the technical field of refreshing and storage of fruits and vegetables. Aiming at the characteristics of moisture loss, browning, microbial contamination and difficulty in quality maintenance in the fresh-cut fruits and vegetables, the invention provides a method for prolonging the shelf life by pressurization of the mixed inert gases. The fresh-cut fruits and vegetables are pressurized by the mixed inert gases (argon, nitrogen and xenon) to reach the pressure of between 20 and 25 MPa and are processed for 30 to 60 minutes, and water molecules on fresh-cut surfaces form gas hydrates, so the activity of the water molecules in the fruits and vegetables and the activity of enzymes are inhibited, and 15 to 20 percent of inert gas-containing micro air holes are formed in tissue to achieve the better subsequent refreshing effect. By the method, the metabolic loss and microbial contamination during the storage of the fresh-cut fruits and vegetables are reduced, the enzymatic browning and tissue softening of the fresh-cut fruits and vegetables are inhibited, the organoleptic quality and nutritive value of the fresh-cut fruits and vegetables are better kept, the shelf life of the fresh-cut fruits and vegetables is prolonged by 10 to 15 days under the condition of cold storage, and the shelf storage life of the fresh-cut fruits and vegetables is prolonged by 7 to 8 days at room temperature.

The invention relates to a method for producing high-concentration lactic acid by lignocellulose at a high temperature. The method comprises the following steps of 1, carrying out solid-state biological detoxification of a lignocellulose raw material under the condition of a very low water use amount, 2, culturing pediococcusacidilactici DQ2 by a liquid medium, 3, carrying out simultaneous saccharification and fermentation production of lactic acid in a fermentation tank, and 4, adding the fermented culture and the lignocellulose raw material obtained by the step 2 and 3 into a reactor for simultaneous saccharification and fermentation, adjusting required solid content, adding a nutritive salt and cellulase into the reactor, and carrying out simultaneous saccharification and fermentation of the lignocellulose raw material under the conditions of a temperature of 48 DEG C and a pH value of 5.5 to obtain high-concentration lactic acid. Lactic acid is produced by lignocellulose as a raw material at a temperature of 48 DEG C so that cellulose enzymolysis efficiency is improved; a cellulase use amount is reduced; a cooling water use amount is reduced; a production cost is reduced; and a risk of microbiological contamination in fermentation is reduced.

The invention discloses a preparation method of a solid microbial inoculant. The method comprises the following steps: concentrating a strain culture solution, adding an inhibitor, uniformly mixing a certain amount of solid adsorbing carrier, drying the mixture, and adding a deoxidizer to obtain the solid microbial inoculant. The method can enhance the storage time and viability of the solid microbial inoculant and lower the preservation and transportation cost; and the inhibitor and iron powder deoxidizer are added to lower the microbiological contamination probability, prevent the residual organic matters of the strain culture medium from oxidation, lower the activity of the target strain to some extent and perform promotion functions on prolonging the storage time.

A method and system control microbes in buildings. In one embodiment, the system includes controlling microbes in a building using an air conditioning system. The air conditioning system takes air and conditions air to be introduced to the building. The system also includes a purification device disposed in the air conditioning system. The purification device includes a catalyst comprising titanium dioxide and a light disposed to emit electromagnetic radiation into the catalyst. The purification device is disposed to allow the air to flow into the purification device and contact the catalyst with a reaction producing hydrogen peroxide gas. The system also includes air conditioning ductwork in the building. Treated air including the hydrogen peroxide gas flows from the air conditioning system to the ductwork. The system also includes a vent disposed in a room of the building. The treated air flows through the ductwork to the vent and in to the room. The hydrogen peroxide gas controls microbes in the room by degrading the microbes.