Abstract: A communication method includes storing, by a terminal device, a first parameter usable by the terminal device in a first mode. The communication method further includes failing, by the terminal device, to access a network device, failing to register with the network device, or failing to be capable of camping on a network of the network device. The communication method further includes performing, by the terminal device, access to the network device in the first mode by the first parameter.

Abstract: An information reporting method includes receiving, by a terminal device, a capability inquiry message from a first network device, and obtaining first release information of a second network device. The information reporting method also includes determining, by the terminal device, first capability information of the terminal device based on the first release information. The information reporting method further includes sending, by the terminal device, the first capability information to the first network device.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A terminal device receives indication information from a first access network device. The indication information is used to indicate to fall back a capability of the terminal device to a first protocol version. The terminal device communicates, based on the indication information, with the first access network device by using first capability information. A protocol version corresponding to the first capability information is lower than or equal to the first protocol version. In this method, because a network device can explicitly indicate to fall back the capability of the terminal device to the first protocol version, the terminal device can specially reduce the capability, so as to quickly resolve a communication problem caused by incompatibility between the terminal device and the access network device.

Abstract: This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A terminal device receives an identifier of a filtering protocol version from an access network device, and then sends first capability information of the terminal device to the access network device based on the filtering protocol version. In this method, the terminal device may report capability information based on the filtering protocol version sent by the access network device. Compared with a manner in which the terminal device directly reports the capability information, this method can effectively reduce a communication problem caused by mismatch between a protocol version supported by the terminal device and a protocol version supported by the access network device and/or a protocol version supported by a core network device.

Abstract: The present invention provides an oil slurry filter, a filter unit including the oil slurry filter, a multiple-filter system including the oil slurry filter, and a multiple-stage filter system including the oil slurry filter. Due to the use of the filter component of flexible texture in the oil slurry filter of the present invention, the problems that the filter material is easily blocked by high-viscosity colloidal impurities, the regeneration efficiency of the filter is poor and the filtration efficiency is low are solved, and it is possible to make the backwash treatment of the filter residue more convenient and improve the regeneration efficiency of the filter. The present invention also provides a filtering process using the oil slurry filter to ensure long-term stable operation of the oil slurry filtering process.

Abstract: A fidaxomicin purification method, comprising: fermenting Actinoplanes sp. HS-16-20 to generate fermented liquid; conducting solid/liquid separation on the fermented liquid, soaking mycelium in an organic solvent, and filtering to obtain a solution containing fidaxomicin; treating the solution with nanofiltration concentrate, and separating to obtain fidaxomicin crude product; conducting preparative column chromatography on the fidaxomicin crude product, eluting with an acid aqueous solution containing an organic solvent, and separating to obtain the refined fidaxomicin product.

Abstract: Disclosed herein are compounds tenvermectin A and B and mixtures of compounds tenvermectin A and B for preventing and treating human or animal parasitic infection. Tenvermectin A and B are macrolide compounds and are produced by genetically engineered bacteria. Tenvermectin A and B are structurally similar to avermectin, ivermectin, milbemycin and emamectin benzoate. The toxicities of tenvermectin A and B are significantly lower than avermectin, ivermectin, milbemycin and emamectin benzoate. The disclosed compounds and mixture of compounds belong to a class of compounds that are useful for killing and eliminating parasites, such as nematodes or arthropods.

Abstract: Disclosed herein are compounds tenvermectin A and B and mixtures of compounds tenvermectin A and B for the control of harmful insects in agricultural and forest crops. The tenvermectin A and/or the tenvermectin B of the present invention have a significant control effect on harmful insects in agricultural and forest crops, for example, Bemisia tabaci, Frankliniella occidentalis Pergande, Laodelphax striatellus, Nilaparvata lugens, Sogatella furcifera, Cnaphalocrocis medinalis, rice Chilo suppressalis, rice Scirpophaga incertulas and Coptotermes formosanus Shiraki, and have low toxicity, and are more environmentally friendly and have good application prospects.

Abstract: A sixteen-membered macrolide compound and use thereof, the compound structure being represented in formula (I), wherein R is CH3 or C2H5. The present compound has a wide range of application in the preparation of chemicals for preventing and controlling insect pests and mites of agriculture and forestry.

Abstract: A fidaxomicin purification method, comprising: fermenting Actinoplanes sp. HS-16-20 to generate fermented liquid; conducting solid/liquid separation on the fermented liquid, soaking mycelium in an organic solvent, and filtering to obtain a solution containing fidaxomicin; treating the solution with nanofiltration concentrate, and separating to obtain fidaxomicin crude product; conducting preparative column chromatography on the fidaxomicin crude product, eluting with an acid aqueous solution containing an organic solvent, and separating to obtain the refined fidaxomicin product.

Abstract: A sixteen-membered macrolide compound and use thereof, the compound structure being represented in formula (I), wherein R is CH3 or C2H5. The present compound has a wide range of application in the preparation of chemicals for preventing and controlling insect pests and mites of agriculture and forestry.

Abstract: The present invention relates to a method for preparing highly pure doxorubicin. The method comprises the following steps: (1) chromatographing a prepurified doxorubicin solution by using macroporous resin, pre-washing the chromatographed system by using an acidic low concentration aqueous organic solvent, and performing elution by using an acidic high concentration aqueous organic solvent; (2) performing chromatographic separation on eluted components by using a preparative column, so that a highly pure doxorubicin component can be obtained, and the doxorubicin can, if needed, be separated from the aqueous solution by using conventional concentration and crystallization methods in the prior art. The present invention has the advantages such as simplicity, high yield, low cost, and less environmental pollution. The content of the prepared doxorubicin is greater than 99.5%, the content of each impurity is controlled to be lower than 0.10%, and the USP and EP standards are met.