Abstract: The present invention provides an anhydrous crystal of polymyxin B1 sulfate, polymyxin B2 sulfate or a mixture thereof and a preparation method thereof. The preparation method comprises using an organic solvent to precipitate a solid from a saturated solution of polymyxin B1 sulfate, polymyxin B2 sulfate or a mixture thereof, drying it under vacuum to obtain an anhydrous crystal of polymyxin B1 sulfate, polymyxin B2 sulfate or a mixture thereof.

Abstract: A method for measuring and dynamically modulating characteristics of slow light in a photonic-crystal coupled-cavity waveguide is set forth. A photonic-crystal structure consists of a series of microcavity components formed by arranging silicon dielectric rods in triangular lattice structure in the substrate of organic polymer polystyrene with an electro-optical effect, a light waveguide structure being along the X direction, and regularly removing single silicon dielectric rods. The present disclosure has the beneficial effects that extremely high slow light effect and high-performance all-optical buffer are realized.

Abstract: The present invention provides a polymyxin B sulfate crystal and a preparation method thereof. Said method comprises the following steps of: adsorbing a polymyxin B fermentation liquid with a resin, and adding sulfuric acid or acidic ethanol for desorbing; concentrating to obtain a saturated solution of polymyxin B sulfate; and using an organic solvent to precipitate a crystal from the saturated solution, filtering and drying to obtain the polymyxin B sulfate crystal.

Abstract: The invention discloses an arylpyrrolecarbonitrile compound for insecticidal use, a preparation method and use thereof, an agricultural insecticide and a method for controlling pests. The preparation method comprises the following preparation steps: (1) 2-p-chlorophenyl-4-bromo-5-trifluoromethyl-3-cyanopyrrole, 2-chloro-5-chloromethylthiazole and potassium carbonate are provided as reaction starting materials in a ratio of the amount of substance of 1:1:1.2, and starting materials are put into a three-necked bottle together with DMF; (2) the materials are reacted at 60 to 100° C. for 1 to 4 hours; (3) the reaction is stopped after the completion of the reaction of the starting materials is detected, the materials are cooled to room temperature and filtered by suction to give 4-bromo-2-(4-chlorophenyl)-1-(2-chloro-5-thiazolylmethyl)-5-trifluoromethylpyrrole-3-carbonitrile as a white solid.

Abstract: The invention discloses an arylpyrrolecarbonitrile compound for insecticidal use, a preparation method and use thereof, an agricultural insecticide and a method for controlling pests. The preparation method comprises the following preparation steps: (1) 2-p-chlorophenyl-4-bromo-5-trifluoromethyl-3-cyanopyrrole, 2-chloro-5-chloromethylthiazole and potassium carbonate are provided as reaction starting materials in a ratio of the amount of substance of 1:1:1.2, and starting materials are put into a three-necked bottle together with DMF; (2) the materials are reacted at 60 to 100° C. for 1 to 4 hours; (3) the reaction is stopped after the completion of the reaction of the starting materials is detected, the materials are cooled to room temperature and filtered by suction to give 4-bromo-2-(4-chlorophenyl)-1-(2-chloro-5-thiazolylmethyl)-5-trifluoromethylpyrrole-3-carbonitrile as a white solid.

Abstract: A system and method for providing a quarantine network to address threats emanating from viruses and worms. A quarantine network quarantines an infected terminal's traffic from the normal traffic flow. During the quarantine period, all of the traffic is analyzed by a quarantine network component. Based upon the results of this analysis, the network can restrict the access of infected terminals to various services, as well as prevent other devices from becoming infected by blocking infected materials such as attachments from reaching their respective recipients.

Abstract: A set of associated keys for an authentication process to be performed in a second network is calculated based on a random value used in an authentication process of a first network.

Abstract: The invention relates to a method comprising initiating a session from a subscriber terminal, wherein the subscriber terminal does not comprise a specific user identification module, and authenticating the session based on a temporary identification of the subscriber terminal, by using a procedure performing a server authentication and avoiding a client authentication.

Abstract: The invention relates to a method comprising initiating a session from a subscriber terminal, wherein the subscriber terminal does not comprise a specific user identification module, and authenticating the session based on a temporary identification of the subscriber terminal, by using a procedure performing a server authentication and avoiding a client authentication.

Abstract: A system deactivates an established communication channel between a user station and an access point. The system provides a service to the user station. The system transfers user data stored in a database entity to a serving controller connected between the user station and the access point. The system defines at the serving controller that the user station is not permitted to access the service, and allows for deactivation of the established communication channel based on the transferred user data.

Abstract: A set of associated keys for an authentication process to be performed in a second network is calculated based on a random value used in an authentication process of a first network.

Abstract: A system and method for providing a quarantine network to address threats emanating from viruses and worms. A quarantine network quarantines an infected terminal's traffic from the normal traffic flow. During the quarantine period, all of the traffic is analyzed by a quarantine network component. Based upon the results of this analysis, the network can restrict the access of infected terminals to various services, as well as prevent other devices from becoming infected by blocking infected materials such as attachments from reaching their respective recipients.

Abstract: A system deactivates an established communication channel between a user station and an access point. The system provides a service to the user station. The system transfers user data stored in a database entity to a serving controller connected between the user station and the access point. The system defines at the serving controller that the user station is not permitted to access the service, and allows for deactivation of the established communication channel based on the transferred user data.