598 results about "Virus free" patented technology

A system and method update client computers of various end users with software updates for software products installed on the client computers, the software products manufacturered by diverse, unrelated software vendors. The system includes a service provider computer system, a number of client computers and software vendor computer systems communicating on a common network. The service provider computer system stores in an update database information about the software updates of the diverse software vendors, identifying the software products for which software updates are available, their location on the network at the various software vendor computer systems, information for identifying in the client computers the software products stored thereon, and information for determining for such products, which have software updates available. Users of the client computers connect to the service provider computer and obtain a current version of portions of the database. The client computer determines that software products stored thereon, and using this information, determines from the database, which products have updates available, based on product name and release information for the installed products. The user selects updates for installation. The selected updates are downloaded from the software vendor computer systems and installed on the client computer. Payment for the software update and the service is mediated by the service provider computer. Authentication of the user ensures only registered users obtain software updates. Authentication of the software updates ensures that the software updates are virus free and uncorrupted. Changes to the client computer during installation are monitored and archived, allowing the updates to be subsequently removed by the user.

A process is provided for selectively removing protein aggregates from a protein solution in a normal flow (NFF) filtration process. Preferably, it relates to a process for selectively removing protein aggregates from a protein solution in a normal flow (NFF) filtration process and virus particles from a protein solution in a two-step filtration process. In a first step, a protein solution is filtered through one or more layers of adsorptive depth filters, charged or surface modified microporous membranes or a small bed of chromatography media in a normal flow filtration mode of operation, to produce a protein aggregate free stream. The aggregate free protein stream can then be filtered through one or more ultrafiltration membranes to retain virus particles at a retention level of at least 3 LRV and to allow passage therethrough of an aggregate free and virus free protein solution.

The present invention is directed to computer viruses and more particularly to a method and system for use in a virus-free certificate firewall, of controlling and filtering files using a virus-free certificate. An example embodiment of the method comprises the steps of: receiving a file; if a virus-free certificate (200) is required for the file: determining whether the a virus-free certificate is already associated with the file; if a virus-free certificate is already associated with the file: authenticating the associated virus-free certificate, said virus-free certificate comprising a certificate signature; if the virus-free certificate is authenticated, determining whether the file is virus-free or not; if the file is virus-free, forwarding the file with the associated virus-free certificate; if the virus-free certificate is not authenticated or if no virus-free, certificate is associated with the file; determining whether the file is virus-free or not, if the file is virus-free, associating with the file a new virus-free certificate; and forwarding the file with the new virus-free certificate.

A method and system are disclosed for generating and using a virus-free file certificate integrated in a file. The method, for use in a virus-free certificate authority (102), for generating a virus-free certificate (200) certifying that a file is virus-free includes the steps of: receiving (300) a virus-free certificate request for a file from a server (101) or a client (100) system, said virus-free certificate request including the file for which the virus-free certificate is requested; determining (301) whether a virus-free certificate is integrated in the file; if no virus-free certificate is integrated in the file: determining (305) whether the file is virus-free or not; if the file is declared virus-free by the virus-free certificate authority (102): generating (313, 314) a virus-free certificate (200) including a file signature (207) for certifying that said file is declared virus-free by the virus-free certificate authority (102); integrating (316) the generated virus-free certificate (200) in the file; sending (316) back in response to the virus-free certificate request the file with the integrated virus-free certificate (200). The method for use in a server (101) or client (100) system, for determining that a file is virus-free includes the steps of: determining (401) whether a virus-free certificate (200) is integrated within a file; if a virus-free certificate is integrated within the file: authenticating (415) the virus-free certificate (200), said virus-free certificate including a certificate signature (206); authenticating (407) the file, said virus-free certificate (200) including a file signature (207), said file signature certifying that said file has been declared virus-free by a virus-free certificate authority (102).

A method, telecommunications node and computer data signal message are provided for optimising the virus scan process in a network with multiple nodes. When a node scans a message for viruses, it also includes in the message a virus scan tag indicating that the message was scanned and is virus-free. Optionally, the virus scan tag includes a virus scan application Id and a virus definition file Id of the application and virus definition file used for the scan. Also optionally, the message comprises security information, such as an electronic signature, encryption, integrity check information, or the sender's node Id. The receiving side may analyse the security information from the message, and if the content is determined to be trusted, may further check the virus scan tag to determine if the message was already scanned for viruses. If so, the receiving side may skip scanning the message again for viruses.

A method and system as disclosed for use in a virus-free certificate proxy (107, 801), of retrieving from one or a plurality of virus-free certificate authorities (104, 804) a virus-free certificate (200) certifying that a file is virus-free. The method includes the steps of: receiving (1001) virus-free certificate request for a file; selecting a virus-free certificate authority (104, 804) having authority to generate a virus-free certificate (200) for the file; requesting (1003 . . . 1007) the virus-free certificate to the selected virus-free certificate authority (104, 804); receiving (1003 . . . 1007) from the selected virus-free certificate authority the generated virus-free certificate; sending back (1005) in response to the virus-free certificate request the received virus-free certificate.

The invention belongs to the field of potato stock seed culture and particularly relates to a method for culturing potato virus-free test-tube plantlets in a water culture mode. The method comprises the steps of seedling exercising, rooting treatment, nutrition liquid preparation, field planting, culture and transplanting. In aspects of variety, culture density, nutrition liquid concentration and rooting agent concentration, the propagating factor and the strong seedling quantity are increased, corresponding measures are adopted for handling in each link, the propagating factor of virus-free seedlings is improved, healthy and strong virus-free seedlings are obtained, and the soilless culture mode requirements of fog culture, substrates and the like are met, so the healthy and efficient potato stock seed production is reached. The original virus-free, germless and insect-free characteristics of the plantlets are maintained, the characteristics of simple technology, low cost, strong germchits and the like are also realized, in addition, the survival rate of the water culture potato seedlings transplanted to the substrates or other soilless culture (such as fog culture) is very high and can sometimes reach 99 percent, and the production efficiency of potato stock seeds is improved.

The invention provides a preparation method of virus-free seedlings of sweet potato. The method comprises the following steps: placing sweet potato blocks that are exposed under the sun and matured banana together for 3 to 5 days; planting the sweet potatoes in sandy soil to accelerate the germination in a culture box; setting relatively high temperature; picking 1-2cm top end of the seedling based on the length; cutting off the visual leaves; disinfecting the surface; rinsing with sterile water; picking off stem tip with 1 to 2 leaf primordium; inoculating to the corresponding culture medium to respectively induce differentiation of adventitious buds and generation of somatic embryogenesis; performing virus detection to a regeneration plant; performing subculture for the virus-free seedling; hardening-seedling; directly planting into a plastic greenhouse; performing flood irrigation with more water; preventing direct exposing under sun at noon in the first two weeks after transplanting; applying urea three weeks after transplanting; watering to obtain virus-free seedlings. According to the preparation method of the virus-free seedlings of sweet potato, the virus-free test-tube plantlets are acclimated and then directly planted into the plastic greenhouse, thus the survival rate is obviously raised, and the operation processes are decreased; the process of acclimating in an acclimating room is saved, and as a result, labor, materials and property are saved.

The invention provides a method for isolated culture of Haworthia succulent plants, which is characterized by comprising the followings steps of: (1) selecting and disinfecting explants; (2) building a sterile system; (3) cluster bud mulitiplication of the sterile system; (4) culturing rooting; and (5) exercising seedling of test-tube plantlet. The method utilizes tissue culture technology to carry out factorization rapid propagation on the tissue culture so as to have the advantages of less material consumption, rapid propagation, purification, rejuvenation, virus free and the like, the seedling propagation speed can be fasted, and annual production of high-quality seedlings is realized. The method has a positive meaning for development of flowers with the name.

The invention relates to a method for producing sweet potato detoxified seedlings in a water culture manner. Healthy and robust detoxified seedlings are obtained by adopting an improved MS minimal medium and a greenhouse hydroponic micropropagation method. The requirements of soilless cultivation ways based on vermiculite, pearlite matrix and the like are met, so that healthy and efficient sweet potato seed production is carried out. By adopting the method, the original characteristic that the tissue culture seedling is free from viruses, bacteria and insects is kept, the traditional breeding technique is innovated, the growth speed of the detoxified seedlings is greatly accelerated, the breeding cycle is shortened, and the production cost is greatly reduced. The water culture seedling is simple in operation procedure, and the hydroponic seedlings can be produced within 4-6 months in a large scale according to the production requirements. Therefore, the problem that the detoxified seedlings cannot be quickly at low cost in a large scale by the traditional seedling cultivation method is solved.

The invention discloses a citrus scion pretreatment technology for promoting removal of composite infection pathogens. The citrus scion pretreatment technology includes acquiring citrus branches, pruning the citrus branches to remove leaves and leaf stalks and disinfecting the surfaces of the citrus branches by the aid of sodium hypochlorite (NaClO) aqueous solution; detecting molecules of scions of the citrus branches with the disinfected surfaces; performing detoxification treatment on scion materials by the aid of insecticides if the detected citrus branches are infected by HLB (huanglongbing) viruses and CTV (citrus tristeza viruses), acquiring virus-free shoots and completing the citrus scion pretreatment detoxification step. The citrus scion pretreatment technology has the advantages that the citrus branches are treated by the aid of small-molecule bactericide triclosan (TCL) and a plurality of antibiotics, so that virus-free stem tip materials without the citrus tristeza viruses (CTV) and huanglongbing (HLB) pathogens can be acquired; the detoxification efficiency is high, and a good effect can be realized; the virus-free stem tip materials can be provided for further stem tip micro-shoot grafting or tender-shoot grafting.

The invention discloses a siraitia grosvenorii tissue culture seedling propagation method, which comprises the following steps of (1) collection of a propagation material, (2) disinfection treatment, (3) virus-free culture of stem tips, (4) secondary culture of segments, (5) induced rooting culture, (6) transplantation, (7) seedling raising in a greenhouse and (8) discharging from the greenhouse. According to the siraitia grosvenorii tissue culture seedling propagation method, tissue culture seedlings are cultured by a cutting technology under an aseptic condition, tissue culture seedling planting has the characteristics of high yield, less plant disease, high propagation speed, high adaptability, capability of planting and harvesting in the same year and high yield, and conventional seed potato planting is gradually replaced by tissue culture seedling planting.

A filtering method and apparatus for a hand-held computing device such as a palmtop computer. The operating system's program registry is copied and then modified to direct all application data to a filter program such as a virus scanning filter program. If the filter program determines that the object is virus free, the copy of the program registry (filter registry) is queried by the filter program to determine the application program associated with the data object. The data object is then forwarded to the appropriate application program.

The present invention relates to computer viruses and more particularly to a method and system for requesting a virus-free certificate associated with a file of a file server and downloading this virus-free file certificate or a file including this virus-free file certificate from the file server. The method, for use in a client system (100), comprises the steps of:

• • sending (401) a request to a file server for a virus-free certificate associated with a file to download from the file server, the request comprising one or a plurality of requirements (301 . . . 307) for the virus-free certificate;
  • downloading (403) the file and the associated virus-free certificate, the virus-free certificate comprising a file signature (207) for certifying that the file is declared virus-free by a virus-free certificate authority (102).

The method, for use in a file server (101), comprises the steps of:

• • receiving (401) a request from a client system for a virus-free certificate associated with a file to download to the client system, the request comprising one or a plurality of requirements (301 . . . 307) for the virus-free certificate;
  • downloading (403) the file and the associated virus-free certificate, the virus-free certificate comprising a file signature (207) for certifying that the file is declared virus-free by a virus-free certificate authority (102).

The invention discloses high-performance environment-friendly shrimp fodder and a preparation method thereof. The fodder for sea shrimps and freshwater shrimps is prepared by substituting raw materials, such as earthworm powder, snail powder, fly larvae powder, yeast, and the like for protein raw materials, such as fish meal, meat, bone meal, and the like, substituting peanut powder for soybean meal, substituting minor cereal tapioca for staple food grain, such as corn, wheat, and the like, and substituting the mechanism effects of peptide substances in maggot powder, enzymes of earthworm powder, enzymes of a multifunctional plasminogen activator, microbial probiotics flora, pathogenic bacteria inhibitor, and the like for chemical growth hormones and chemical medical antibiotics. The high-performance environment-friendly shrimp fodder is characterized by being prepared from the following raw materials by weight parts: 30-50 parts of virus-free cassava, 10-20 parts of earthworm powder, 5-20 parts of snail powder, 5-15 parts of fly larvae powder, 6-20 parts of yeast, 5-10 parts of peanut powder, 1-4 parts of garlic powder, 1-4 parts of mineral trace elements, 2-5 parts of amino acids, 0.5-2 parts of lecithin, 0.5-2 parts of vitamins, 0.5-3 parts of multifunctional plasminogen activator and 0.5-3 parts of microbial probiotics. The invention has the advantages of improved fodder quality, decreased production cost, improved safety rate of culture food, and the like.

The invention provides a plant disease classification prevention method. The plant disease classification prevention method is achieved through the following measures: a physiological disease: 5kg effective microorganisms (EM) and 4kg spore bacteria are used for irrigating roots per mu; a viral disease: (1) virus-free seedlings are adopted; (2) virus is spread through insect biting, pests are prevented, (3) virus is generated through high temperature and drought, irrigation and ventilation are performed in time; (4) virus is caused by excessive phosphorus, excessive chlorine, zinc deficiency, copper deficiency and molybdenum deficiency, fertilizers are applied in balanced mode; and (5) pesticide spraying: the pesticide is prepared by sodium dichloroisocyanurate, chlorinated isocyanuric acid sodium, chlorine dioxide, copper preparation, triazole nucleotide, moroxydine hydrochloride, iodine and Chinese herba preparation; fruit tree root carcinoma: (1) no continuous cropping garden is established, no continuous seedling is used; (2) roots of seedlings are dipped in anti-cancer bacteria before planting; (3) root carcinoma is serious in clay with poor ventilation, the seedlings should be planted on high ridge, and more organic fertilizers are applied; (4) root carcinoma is serious under the condition of excessive phosphorus, calcium deficiency and copper deficiency, fertilizers needs to be applied in balanced mode; and (5) microelement fertilizers or anti-cancer bacteria are scattered at the roots after the root carcinoma is cut off. The plant disease classification prevention method can kill sterilization diseases and pesticides and is convenient to use.

The invention provides a local breeding technology for the virus-free seedling of Korla pear. The technology comprises the following steps: 1) raising the seedling of Korla pear by grafting; 2) raising the virus-free seedling by using the stem tip of Korla pear; 3) carrying out T-shaped bud grafting; and 4) cultivating Korla pear by using a flat shed net rack. According to the invention, through virus-free cultivation and micro-grafting of the stem tip of Korla pear, virus-free cultivation of the seedling of Korla pear is realized and the high-quality Korla pear seedling is produced; since appropriate rootstocks are selected from local Korla pear rootstocks, a cultivation model for Korla pear applicable in acidic soil is established; and since Korla pear has a shed frame shape, ventilation and light transmission are realized, strong wind resistance and high fruit quality are obtained, and management is easy.

The invention discloses a cultivation method for high-yield potatoes. The method comprises the following steps: selecting an improved potato variety, namely using virus-free seed potatoes as sowing materials, sowing intact small potatoes, carrying out germination acceleration and seed drying in the sun, performing rational rotation, carrying out deep tillage and soil preparation, performing sowing timely, carrying out plastic film mulching, conducting rational fertilization, performing scientific management, preventing premature senility, etc. The cultivation method provided by the invention is scientific, reasonable, simple and practicable, and is suitable for large-scale popularization; meanwhile, the planted potatoes have the advantages of large tubers, low occurrence rate of diseases and pests and high quality and yield, and have important economic benefits.