218 results about "Virus removal" patented technology

A virus removal bag for removing viruses from a virus-containing suspension, comprising a pouchy casing (a) having at least one inlet and at least one outlet, and a separation membrane (b) which is securely held in the pouchy casing (a) and which partitions the internal space of the pouchy casing (a) into a first compartment (c) communicating with the inlet and a second compartment (d) communicating with the outlet, wherein at least a part of the separation membrane (b) is made of a virus removal membrane.

A system and method for distributing portable computer virus definition records with binary file conversion are described. One or more virus definition records are stored into a structured virus database. Each virus definition record includes an identifier uniquely identifying a computer virus, at least one virus name associated with the computer virus, a virus definition sentence comprising object code providing operations to detect the identified computer virus within a computer system, and a virus removal sentence comprising object code providing operations to clean the identified computer virus from the computer system. At least one updated virus definition record is stored into the structured virus database indexed by the identifier and the at least one virus name for each virus definition record. The virus definition records stored in the structured virus database are converted into a virus data file. The virus data file includes virus definition sets. Each virus definition set includes binary data encoding instructions to detect the computer virus within a computer system, instructions to clean the computer virus from the computer system, and names associated with the computer virus.

The invention provides a method and a device for removing malicious programs, and the method comprises the following steps: firstly constructing a database, wherein files which are not infected with virus and file information which corresponds to the files are stored in the database; matching information of a file infected with the virus with the file information which is not infected with the virus and stored in the database when confirming that the certain file in a client computer is infected with the virus; loading the file which is not infected with the virus and corresponds to the file information which is not infected with the virus in the database into the client computer, and replacing the file infected with the virus. The utilization of the method and the device can effectively avoid damaging the file or solve the problem that the file can not be implemented after removing the virus or Trojan and other malicious programs in the computer, facilitate the treatment of the file infected with the virus for a user of the computer and provide a virus removal scheme which is safer and more effective.

Purification of α-1 proteinase inhibitor (α-1 PI) from solutions comprising α-1 PI is accomplished using hydrophobic interaction chromatography (HIC). In some embodiments, purification of α-1 PI is accomplished by precipitation of contaminating proteins from a starting solution comprising α-1 PI, such as human plasma, followed by anion exchange resin chromatography prior to HIC. Further purification may be accomplished by an optional cation exchange chromatography subsequent to anion exchange chromatography but prior to HIC. Some embodiments of the invention also include virus removal and/or inactivation by methods such as nano filtration and such as contact with a non-ionic detergent. The methods of the present invention result in greater yield, purity, and pathogenic clearance of plasma fractions than known methods.

The invention is a nano-entity conjugate for use in an in vivo immunomagnetic hyperthermia system for the detection and treatment of any cell or virus having a target surface receptor which encompasses a technology platform that can be used for both real-time monitoring of any cell or virus having a target surface receptor and as a delivery platform for certain types of treatment that are conducive for in vivo applications. The system allows of cell or virus enumeration; cell or virus capture; and cell or virus removal from the patient's circulatory system in-vivo using immunomagnetic hyperthermia. The application of immunomagnetic hyperthermia may actually diminish and eventually stop the progression of cancer and other blood borne or blood affected diseases.

In order to provide a storage system, virus infection spreading prevention method, and virus removal support method capable of performing an operation to prevent spreading of a virus infection and an operation to remove a virus straightforward, at an operation host, a virus check is executed for volumes, infection state information is sent to a management host according to detection results when a virus infection is detected, and at a management host, predetermined processing is executed in order to put the state of the path with the volume infected with a virus offline based on the infected state information. Further, at the operation host, a virus check is executed for the volumes, and when a virus infection is detected, infection state information is sent to the management host according to the results of the detection. At the management host, the range of influence of the virus infection is specified, the state after removal of the virus from the necessary volumes existing within the range of influence is predicted, and results of the prediction are displayed on a screen.

The invention is a virus removal and rapid propagation technology of sweet potato variety 'Shangshu 19', comprising the following steps: selecting plants which are robust without diseases and insect pests and have characteristics of the variety from growing plants; clipping stem with stem tip; removing visible leaves; sterilizing; peeling the stem tip with 1-2 leaf primodia via a dissecting needle; quickly inoculating into a differentiation and induction culture medium; trimming the sterilized seedling into stem segments with 1-2 internode(s) and switching into an enrichment medium after virus detection; selecting sterilized seedling in vigorous growth to cut into small segments with 1-2 internode(s) and switch into a rooting medium; carrying out domestication on seedling after rooting. The invention has stem tip in virus removal and stem segment in rapid propagation, solves the problems of severe virus disease for sweet potato, poor quality of new cultured breed, germplasm degradation, low yield and the like propagated by using sweet potato block and stem. The invention can artificially control the growing conditions, can not be influenced by nature, and has the advantages of small amount of material use, economical culturing materials, short growth cycle, large propagation coefficient and convenient management and is favor of industrial production.

A filter block having a permeability of greater than about 3.0*10⁻⁹ cm², and a F-VLR of greater than about 99% is provided. The filter block may be made of filter particles having a median particle size of less than about 50 microns and having a particle span of about 1.4 or less. The filter blocks of the present invention can be used to make a filter for filtering liquids and more specifically, for providing potable water. The filter particles may be mesoporous. Kits comprising filters and information relating to the killing or removal of bacteria, viruses, and microbials are also provided.

Process for preparing a purified immunoglobulin preparation. The process comprises the steps of subjecting a crude immunoglobulin solution to caprylic acid treatment, removing protein aggregates and viruses from the immunoglobulin solution, subjecting the immunoglobulin solution to anion exchange chromatography in order to purify the immunoglobulin, filtering the immunoglobulin solution thus obtained on a virus-removal filter to produce an eluate containing immunoglobulin, and recovering the immunoglobulin. By combining caprylic acid treatment and precipitation with a protein precipitant the level of aggregated proteins and viruses is effectively reduced and a truly virus safe preparation is provided after filtration.

The invention discloses a technology for preparing hepatitis B human immunoglobulin for intravenous injection. The protein is purified through caprylic acid precipitation and chromatography, and meanwhile viruses are removed through the S/D inactivation method and DV50 nanometer films. Compared with a traditional technology, the technology for preparing hepatitis B human immunoglobulin for intravenous injection is high in yield, purity and virus removal rate, safer and more effective.

A separation membrane including a separation-functional layer is provided, wherein the separation-functional layer contains a polyvinylidene fluoride-type resin having a melt viscosity of 3,300 Pa·s or more, and also the separation-functional layer has a three-dimensional network structure. A separation membrane is provided having high virus removal performance, high pure water permeability, and high physical durability and high chemical strength, which can also be used in the field of water treatment.

The invention provides a method for removing PVS viruses of potato test-tube plantlets. The method comprises the steps of stripping the stem tips of the pretreated test-tube plantlets and then putting the test-tube plantlets into a stem tip culture medium with the stem tip facing upwards and the section facing downwards for culture, next, culturing the stem tips for 40-50 days under the conditions of a temperature within the range of 22+/-2 DEG C, the illumination time of 12h-15h/d and the illumination intensity of 2000-3000lx, in the period, transferring the stem tips above 0.5cm long to an MS culture medium, and continuously culturing the undifferentiated stem tip callus or small plantlets less than 0.5cm long, and finally, detecting the stem tip seedlings by use of enzyme linked immunosorbent assay, and remaining the satisfied stem tip seedlings, thereby obtaining the potato seedlings without PVS through the whole period of 120-180 days. The method is high in PVS virus removal rate, suitable for batch operations of removing the PVS viruses of the potato variety resources, and capable of obtaining the satisfied seedlings at a time and avoiding repeated labor; besides, the method is high in virus removal rate and stable in virus removal effect, and the detection cost can be reduced.

A method and equipment for removing virus and pathologic cells from blood by use of the composite magnetic microparticles is disclosed. Said composite magnetic microparticles, whose surface carries the specific moleculae (DNA sequence or antibody), are in sufficient contact with blood for adsorbing the viruses and pathologic cells on their surfaces, and then are magnetically separated from the blood.

The invention discloses a method and a device for detecting and removing computer macro viruses. The method comprises the following steps of: traversing a preliminarily defined list to recognize a document template file; performing virus detection treatment on the recognized document template file based on a preliminarily defined virus database comprising a known macro virus characteristic code; performing virus removal treatment on the document template file from which the viruses are detected; and deleting the document template file which is subjected to the virus removal treatment. According to the embodiment of the invention, the problems such as propagation and variation of the macro viruses in the document template file are substantially solved, and the defect that the macro viruses cannot be easily and effectively scanned and removed by the conventional anti-virus mechanism is overcome.

The invention relates to a novel, industrial-scale process for the purification of gamma-immunoglobulins (IgG) starting from plasma or fractions thereof. The method involves two chromatographic steps, i.e. a cation exchange capture chromatography, and then a polishing anion exchange chromatography, ensuring a highly purified end product, which contains no aggregates, and high yields. The process also involves a virus inactivation step by means of a solvent/detergent treatment to inactivate the viruses with a lipid envelope, and a virus removal step by nanofiltering to ensure the removal of the non-enveloped viruses.

The invention relates to a preparation method of monosialotetrahexosyl ganglioside sodium with high purity. The method comprises the following steps: extracting and purifying fresh pig brains taken as raw materials, wherein the extracting step comprises the steps of preparation of acetone powder, extraction of total lipids of tissues, folch distribution, virus removal and acid-hydrolysis virus inactivation; the purifying step comprises the steps of desalination, silica gel chromatography, reversed phase chromatography, concentration, acetone recrystallization and freeze-drying. The method has the beneficial effects that the adverse effect occurrence rate of an injection prepared from the monosialotetrahexosyl ganglioside sodium with the high purity is decreased by 47% according to the tracking statistics of 100 users after the virus removal and the acid-hydrolysis virus inactivation are carried out on the injection under a specific pH condition.

The invention discloses a method for preparing human thrombin from cold-removing glue plasma. Firstly, anion resins are used to absorb prothrombin in the cold-removing glue plasma, then elution and filtering are conducted, and a prothrombin solution is obtained; secondly, the prothrombin solution is activated through a CaCL2 solution, and a thrombin solution is obtained; thirdly, S/D viral inactivation is conducted on the thrombin solution; fourthly, chromatography is conducted through cation columns, and a purified thrombin solution is obtained; fifthly, ultrafiltration, dialysis and concentrate are conducted on the thrombin solution, and the thrombin solution with the titer meeting the product specification requirement is obtained; sixthly, a filter element of 20 nm in size is used to conduct virus removal filtering; seventhly, sterilization filtering is conducted through a filter element of 0.22 microns in size, and then subpackage is conducted according to the required specifications; eighthly, freeze-drying is conducted, and dry heat viral inactivation is conducted on freeze-drying powder, and a human thrombin product is obtained. According to the method, the thrombin is purified through the one-step cation columns, operation is simple, thrombin specific activity is high, and safety of clinic use of the product is guaranteed through a three-step virus elimination mode.

The invention relates to an outdoor transplanting and temporary planting method of stock seedlings of healthy sugarcane seedlings, comprising the following processes: outdoor land preparation and bed preparation; transplantation matrix preparation; sparse planting and transplanting of the stock seedlings; short-term heat preservation and moisture preservation; management of water, fertilizers andpesticides; and outplanting. In the invention, the production technology system of the biochemical virus removal of healthy sugarcane seedlings is established, the technical problems of virus removaland rapid propagation of sugarcane axillary buds are effectively solved; the seedling-growing cost is low; the seedling-growing time is short; the seedling-growing survival rate is high; the obtainedbiochemical virus-free healthy sugarcane seedlings have the characteristics of strong tillering rate, high stem forming rate, rapid growth speed, high ratooning rate and the like; the yield per unit area is improved by more than 30%; the sucrose content is improved by 0.5-1.0%; and the using amount of seedlings is saved by more than 60%. The outdoor transplanting and temporary planting method of the invention has great significance for solving the problems of serious degeneration of the sugarcane varieties and low breeding speed of the certified seedlings, plays an active role of promoting the popularization and application of healthy sugarcane seedlings and has important economic and social benefits.

The invention discloses a human coagulation factor VIII preparation method. In the preparation process of a human coagulation factor VIII, a two-step filter press technique is adopted during treatment of human plasma initial materials, that is, a K700 filter plate is adopted for filter pressing after cryoprecipitate dissolution, the filter press liquor is collected, the pH value is adjusted, a 2% aluminium hydroxide gel is added for adsorption, and then an EK filter plate is adopted for filter pressing. The two-step filter press technique is adopted to improve the separation effect, meanwhile, the aluminium hydroxide gel adsorption method is used together to remove a coagulation factor on which vitamin K depends, the aluminium hydroxide gel does not adsorb the human coagulation factor VIII, and the product yield is high. In the preparation process, the two-step filter press technique replaces a traditional two-step high-speed centrifuging method, a CUNO DELP deep filter element is adopted for filtration, a two-step gradient dialysis method is adopted, a re-dissolution and re-freezing process is added to a freeze-drying process, and meanwhile, various virus removal/inactivation technologies are adopted in the production process, so that the product yield can be improved, the risk of virus spreading can be reduced, and the clinical medication security is improved.