42 results about "Bacterial contaminants" patented technology

The invention is directed to a fermented and clarified nisin-containing whey and a method of making that can be used to produce a stabilized food product by adding, for example, to the pack water of fresh mozzarella cheese. The resulting stabilized food product retards or limits below detection levels the growth of toxins from pathogenic bacterial contaminants when the nisin-containing whey is added in amounts between about 10 to about 30% to the food product. The stabilized food product improves the safety of the food by retarding the growth of Listeria monocytogenes and improves the shelf life of the product by retarding the growth of gas forming bacteria such as bacteria from the Leuconostoc species.

There is no mask on the market or registered with the USPTO that uses ultraviolet light to kill air-borne viral and bacterial contaminants. The invention will ensure that if an individual must perforce be exposed to contaminated air as a result of natural or manmade events, then that individual will be able to use the Ultraviolet Light Assisted Protective Breathing Mask (the “ULAP Breathing Mask”) to kill whatever known or unknown viruses or bacteria may be in the vicinity. The ULAP Breathing Mask kills these contaminants before inhaled air ever reaches the filters. The prototype weighs approximately three pounds, and so is easily portable and is practical.

The invention discloses a bacterial nucleic acid sequencing identification method based on a DNA bar code. Common bacterial contaminants in a medicine production environment can be effectively and accurately identified. The bacterial nucleic acid sequencing identification method comprises the steps that 1, a monoclonal bacterial strain is obtained through culture; 2, a genome DNA of the monoclonal bacterial strain obtained in the step 1 is extracted; 3, PCR is performed by using a general nucleic acid sequencing primer to amplify a specific sequence of nucleic acids; 4, a PCR product is extracted and purified; 5, a nucleic acid sequence of the PCR product obtained in the step 4 is determined; 6, a sequence analysis software is applied to perform sequence splicing, positioning is performed by using a general nucleic acid sequencing primer pair, a primer region is removed, and a DNA sequence of a corresponding fragment is obtained; 7, the DNA sequence of the corresponding fragment in the step is imported into a DNA bar code standard sequence core database or a GenBank database for sequence comparison, and bacteria are identified.

The invention provides methods and compositions for the detection and/or quantification of a Gram positive bacterial contaminant in a sample. In particular, the invention provides hemocyte-based preparations, methods of making such hemocyte-based preparations, and methods of using such hemocyte-based preparations for the detection and/or quantification of the Gram positive bacterial contaminant.

A method for reducing and/or eliminating bacterial contamination in a food product includes immersing the food product in the tank containing a fluid and discharging a pressure arc beneath the surface of the fluid wherein the pressure arc is effective in disrupting cell equilibrium and/or inactivating the bacteria. A system for use in the method includes an electrical input/output system, a reflector, the reflector reflecting an output charge between two oppositely charged electrodes, and a fluid filled tank. The method and system are effective in the reduction of food-borne bacterial contaminants particularly in or on poultry, red meat, and/or pork.

The apparatus according to the present invention relates generally to a cutting board that can be used during food preparation. In particular the present invention relates to multi-layered cutting boards which are used for the preparation of food that are constructed to prevent bacterial contamination build-up between each stacked cutting layer of the cutting board. Prevention of bacterial contamination is achieved by sealing the perimeter surface of the cutting board using any method of sealing such as laser, heat and chemical processes. Sealing advantageously eliminates seams, crevices and gaps that naturally occur between stacked layers of the cutting board.

The invention belongs to the field of polymer soft materials, and relates to surface-hydrophobic hydrogel as well as preparation and application thereof. The surface of a hydrogel main body material is modified with amphiphilic Janus particles, the hydrophilic ends of the amphiphilic Janus particles interact with the hydrogel main body, and the hydrophobic ends of the Janus particles form a hydrophobic surface on the surface of the hydrogel main body material, so that the surface-hydrophobic hydrogel is obtained. The hydrophobic surface of the hydrogel can prevent the adsorption of bacteria and pollutants and delay the evaporation of water in the hydrogel, so that the long-term stable storage of the hydrogel is facilitated. The surface-hydrophobic hydrogel has potential application value in the fields of antifouling and self-cleaning, wound dressings and the like.

The present invention generally relates to water disinfection systems for use in dental operatory settings. In particular, a dental water disinfector is described, wherein the dental water disinfector is configured to purify water used during a dental procedure. In preferred embodiments of the present invention, the dental water disinfector is utilized to eliminate bacterial contaminants present in water supplies utilized by dental drills and irrigation equipment.

The invention discloses a universal liquid perfusion lubricating coating and a preparation method thereof, and belongs to the field of biomimetic material chemistry. The coating is composed of a dopamine activated layer, a silicon dioxide nanoparticle layer, a fluorinated layer and a lubricating oil layer. The preparation method comprises the following steps: firstly, dopamine is oxidized and self-polymerized to form the polydopamine activated layer under the assistance of polyethyleneimine, then the silicon dioxide nanoparticle layer is formed through a polycondensation reaction of tetramethyl silicate, the fluorinated layer is obtained through further treatment of fluorine-containing silane, lubricating oil is poured to form the lubricating oil layer, and the liquid pouring lubricating coating with universality is obtained. A polluted liquid can slide off from the surface at a small inclination angle, the adhesion amount to proteins and bacterial pollutants is small, the anti-pollution characteristic and the anti-bioadhesion characteristic are excellent, and the coating is feasible for most solid substrates and has universality.

The invention provides a thermotropic air cleaner, belonging to daily electronic equipment field. The thermotropic air cleaner comprises a cleaner framework relevant to application, an airflow generation assembly and a cleansing electric heating element on which an electric heating element is arranged, wherein, the airflow generation assembly is arranged in the cleaner framework and is used for generating airflow, and the cleansing electric heating element is arranged on the cleaner framework and is positioned at least one side of the front side and the back side of the airflow generation assembly. The system is used for providing an element capable of cleansing air quality by the cleansing electric heating element through utilizing the airflow generation assembly to generate airflow on the basis of electric heating cleansing related to the invention. The cleaner can clean bacterial pollutant and toxic material in indoor air, add indoor oxygen content and improve indoor air quality.

Bone such as cortical or cancellous bone or connective tissue are centrifuged as a solution is applied to the tissue in a continuous process. The centrifuge creates forces, which cause the flowing solution to penetrate substantially all of the cavities of the tissue. The solution, which may be alcohol, a detergent, an oxidizer, or a surfactant, with or without water, flushes the cavities of the tissue and removes and inactivates viral and bacterial contaminants. In a second embodiment, bone or connective tissue is centrifuged in a batch process to remove contaminants from cavities in the tissue by first spinning the tissue dry and then submerging the tissue in a viral/bacteria cleansing solution and centrifuging the submerged tissue and solution at a sufficiently high speed and radius from the spin axis to create substantially high G forces on the tissue and solution to force the solution into and through the tissue cavities. The solution with the flushed contaminants is then removed from the vicinity of the tissue. In a further embodiment, an enzyme is centrifuged with the tissue to digest lipids and proteins which are then removed with a flushing solution which may also inactivate viral and bacterial contaminants. In yet a further embodiment, the centrifuge can be used to infuse biologically and/or structurally useful materials into the tissue. Further, the lipids and proteins may be removed by a chemically active agent such as oxo anions.

Disclosed is a method and associated device for the rapid identification of viable bacterial contaminants in food products. The method detects viable microbes by using a combined ATP-bioluminescence immunoassay. Escherichia coli O157:H7 and Salmonella enterica serovar Typhimurium were selected as target organisms in various matrices including ground beef homogenate, apple juice, milk, and phosphate-buffered saline. Specific antibodies were immobilized on the surface of well plates in which the sample matrices were incubated. The plates were washed, and the wells were incubated with BacTiter-Glo reagent in Mueller-Hinton II broth. Bioluminescent output was measured with a luminometer and signal-to-noise ratios were calculated. The LOD was not affected by the presence of non-target cells. A strong linear correlation was observed between the number of cells and luminescent output over 4 orders of magnitude. This method provides a means of simultaneously detecting and identifying viable pathogens in complex matrices.