Abstract: Provided is a method for synthesizing a chiral amine compound. A transaminase is used to transaminate a ketone substrate under the action of an amino donor, to obtain the chiral amine compound; and the conserved amino acid sequence region of the transaminase at least includes a region 1 (MAGLWCVN) and a region 2 (YNTFFKT). With the transaminase with the specific conserved amino acid sequence region to synthesize a large sterically hindered chiral amine, the enzyme catalytic reaction volume is small, the synthesizing route is short, the product yield is high, a high-cost noble metal is not required for catalysis under the synthesizing conditions, three wastes are reduced, and the production cost is saved.

Abstract: A low-heat-loss operation method of a line-focusing heat collection system and the line-focusing heat collection system are provided. The method includes the following steps. Solar energy is utilized to preheat a collector tube in an empty tube state, so that the collector tube is in a preheating mode. After a set preheating temperature is reached, a heat transfer working medium is injected into the collector tube. In the injection process of the heat transfer working medium, an injection section of the collector tube is converted into a focusing mode from a preheating mode. After heat collection is finished, the circulation of the heat transfer working medium is stopped, and the focusing mode of the collector tube is kept. In the drainage process of the heat transfer working medium, an emptying section of the collector tube is converted into a light heat-tracing mode from a focusing mode.

Abstract: Provided are an oil fume sensor and a kitchen appliance. The oil fume sensor includes a housing having an accommodation cavity and a sensor assembly located in the accommodation cavity. The housing also has an air inlet and an air outlet. The air inlet and the air outlet are in communication with the accommodation cavity.

Abstract: Provided are a control method, a control apparatus, a kitchen appliance, and a computer-readable storage medium. The control method includes: obtaining an oil fume concentration based on oil fume data outputted by an oil fume sensor; selecting one speed adjustment curve from a plurality of speed adjustment curves, and controlling operation of a kitchen appliance based on the selected speed adjustment curve and the oil fume concentration; obtaining an adjustment curve by processing a current speed adjustment curve based on an obtained manual speed adjustment operation; and controlling operation of the kitchen appliance by using the adjustment curve.

Abstract: A method of removing organic pollutants in water by zero-valent iron enhanced hypochlorite includes the steps of: adjusting a pH of raw water containing organic pollutants to 4.0˜9.0; adding zero-valent iron solid and hypochlorite to the raw water in a mixer; and turning on the mixer to carry out stirring reaction. The method constructs a Fenton-like system through the redox reaction in the heterogeneous micro-interface region that occurs between zero-valent iron and hypochlorite which produces a variety of active oxidizing species with high occurrence, improves the shortcomings of the traditional Fenton method, broadens the applicable range of pH, and increases the removal efficiency of pollutants in water by 35˜95%.

Abstract: In order to solve the problem in the existing conventional water treatment process of low removal efficiency of heavy metal in water, especially lower efficiency for simultaneous removal of heavy metal pollutants during coexisting, a method is provided for removing heavy metal pollutants in water with divalent manganese strengthened ferrate: preparing a ferrate mother liquor having the concentration of 20-10,000 mmol/L; preparing a divalent manganese salt mother liquor having the concentration of 30-10,000 mmol/L; adding the divalent manganese salt mother liquor into water of the heavy metal pollutants; then adding the ferrate mother liquor, and reacting; and then adding a flocculant and precipitating, so that the removal rate of arsenate, chromium, thallium, antimony, chromium and molybdate in water is 90% or more, and the removal rate of heavy metal such as lead and cadmium is 85% or more.

Abstract: A method for efficiently preparing ferrate based on nascent state interfacial activity. The method is as follows: (a) preparing nascent iron solution; (b) adding an oxidizing agent to the iron solution of step (a); (c) adding alkali solution or alkali particles to the mixed solution of step (b), mixing by stirring, and carrying out solid-liquid separation; (d) adding a stabilizing agent to the liquid separated out in step (c), and thus obtaining ferrate solution. The yield is 78-98%. The prepared ferrate solution is stable and can be stored for 3-15 days.

Abstract: In order to solve the problem in the existing conventional water treatment process of low removal efficiency of heavy metal in water, especially lower efficiency for simultaneous removal of heavy metal pollutants during coexisting, a method is provided for removing heavy metal pollutants in water with divalent manganese strengthened ferrate: preparing a ferrate mother liquor having the concentration of 20-10,000 mmol/L; preparing a divalent manganese salt mother liquor having the concentration of 30-10,000 mmol/L; adding the divalent manganese salt mother liquor into water of the heavy metal pollutants; then adding the ferrate mother liquor, and reacting; and then adding a flocculant and precipitating, so that the removal rate of arsenate, chromium, thallium, antimony, chromium and molybdate in water is 90% or more, and the removal rate of heavy metal such as lead and cadmium is 85% or more.

Abstract: Provided is a filter membrane modifying method based on metallic oxide particles, relating to the field of membrane method water treatment. The method aims to resolve the problems existing in a common organic membrane or inorganic membrane that an intercepted substance is easily adsorbed on the surface of the membrane and in membrane holes during use so that the membrane holes are clogged, a membrane body is polluted, flux attenuation is quick, the service life of the membrane is shortened, and the backwashing efficiency is low. The method comprises: preparing a solution containing metallic oxide particles, then filtering, by using a filter membrane, the solution containing metallic oxide particles, and forming a metallic oxide particle cover layer on the surface of the filter membrane, i.e., completing the filter membrane modifying method based on metallic oxide particles.

Abstract: A method for preparing high-valence iron salt; the present invention relates to a method for preparing a ferrate compound, for solving the technical problems of the complex operating process, the low yield, and the low purity of ferrate products after purification in existing methods for preparing potassium ferrate. The preparation method comprises: 1. weighing solid potassium hydroxide; 2. adding the solid potassium hydroxide to a sodium hypochlorite solution to obtain a hypochlorite solution; 3. adding iron salt to the hypochlorite solution to obtain a potassium ferrate solution; 4. adding the potassium ferrate solution to a cooled potassium hydroxide solution to obtain a solid-liquid mixture; 5. filtering the solid-liquid mixture of step 4; and 6. rinsing the solid-phase substance.

Abstract: The present invention discloses a method and a browser for browsing a web page, and a storage medium, and the method comprises: prestoring identity information of an owner user; receiving a web page browsing request from a browsing user, and obtaining the identity information of the browsing user; comparing the identity information of the browsing user with the prestored identity information of the owner user to determine whether the browsing user is the owner user; browsing a web page in a private browsing mode when the browsing user is determined as the owner user; and browsing a web page in a non-private browsing mode when the browsing user is determined as a non-owner user. By the invention, the privacy of browsing behaviors of the owner user may be effectively protected, and the owner user is enabled to examine browsing behaviors of other non-owner users.

Abstract: A method, device, and system are provided for change the application visual control. In the method: the terminal device obtains an image of a current scene. The terminal device performs intelligent matching on the image of the current scene and replaces the application visual control based on a result of intelligent matching. The system includes a device having a hardware processor and a non-transitory storage medium. The system also includes a database configured to store a plurality of subjects and corresponding pictures.

Abstract: Embodiments of the present invention provide an information sharing method, an information sharing apparatus, and an electronic device. The method is implemented by a first electronic device. The method includes: when it is detected that an electronic device binding option built in a browser is triggered, retrieving a dialog box built in the browser, where at least one electronic device binding function option may be set in the dialog box; when it is detected that an electronic device binding function option is triggered, executing a corresponding electronic device binding function in the background, and sending first information to a server; and after the server determines that a preset correspondence exists between second information sent by a second electronic device and the first information and establishes a binding relationship between the first electronic device and the second electronic device, sharing information between the first electronic device and the second electronic device.

Abstract: A method for efficiently preparing ferrate based on nascent state interfacial activity. The method is as follows: (a) preparing nascent iron solution; (b) adding an oxidizing agent to the iron solution of step (a); (c) adding alkali solution or alkali particles to the mixed solution of step (b), mixing by stirring, and carrying out solid-liquid separation; (d) adding a stabilizing agent to the liquid separated out in step (c), and thus obtaining ferrate solution. The yield is 78-98%. The prepared ferrate solution is stable and can be stored for 3-15 days.

Abstract: Methods and apparatus for presenting clipboard contents on a mobile terminal are provided herein. In an exemplary method, an input-method-control call-out request can be received. An input-method control including a clipboard function key can be displayed. The input-method control can include an input box. A triggering signal for triggering the clipboard function key can be received. A clipboard containing one or more copying items can be displayed.

Abstract: Embodiments of the present invention provide an information sharing method, an information sharing apparatus, and an electronic device. The method is implemented by a first electronic device. The method includes: when it is detected that an electronic device binding option built in a browser is triggered, retrieving a dialog box built in the browser, where at least one electronic device binding function option may be set in the dialog box; when it is detected that an electronic device binding function option is triggered, executing a corresponding electronic device binding function in the background, and sending first information to a server; and after the server determines that a preset correspondence exists between second information sent by a second electronic device and the first information and establishes a binding relationship between the first electronic device and the second electronic device, sharing information between the first electronic device and the second electronic device.

Abstract: Embodiments of the present invention provide an information sharing method, an information sharing apparatus, and an electronic device. The method is implemented by a first electronic device. The method includes: when it is detected that an electronic device binding option built in a browser is triggered, retrieving a dialog box built in the browser, where at least one electronic device binding function option may be set in the dialog box; when it is detected that an electronic device binding function option is triggered, executing a corresponding electronic device binding function in the background, and sending first information to a server; and after the server determines that a preset correspondence exists between second information sent by a second electronic device and the first information and establishes a binding relationship between the first electronic device and the second electronic device, sharing information between the first electronic device and the second electronic device.

Abstract: The present disclosure is applicable to the field of browser, and it provides a method and apparatus for displaying an extended function information area. The method comprises receiving an instruction for activating the extended function information area, acquiring a location where the extended function information area is to be displayed on a page according to the instruction; adjusting layout of the page according to the location and a predefined size of the extended function information area, so as to obtain a blank area on the page; and displaying the extended function information area in the blank area. According to embodiments of the present disclosure, the extended function information area is directly displayed, which enables the extended function information area to be displayed on the same layer as the page, ensures visual areas available to be browsed by users, and facilitates browsing of users.

Abstract: A method for efficiently preparing ferrate based on nascent state interfacial activity. The method is as follows: (a) preparing nascent iron solution; (b) adding an oxidizing agent to the iron solution of step (a); (c) adding alkali solution or alkali particles to the mixed solution of step (b), mixing by stirring, and carrying out solid-liquid separation; (d) adding a stabilizing agent to the liquid separated out in step (c), and thus obtaining ferrate solution. The yield is 78-98%. The prepared ferrate solution is stable and can be stored for 3-15 days.

Abstract: A webpage sharing method, an apparatus and a system are disclosed, the method includes: acquiring, by a device with memory and at least one processor, a webpage sharing instruction, acquiring an terminal identification (ID) corresponding to a terminal according to the webpage sharing instruction, acquiring a webpage identifier that identifies at least a portion of the webpage, and transmitting the webpage identifier to an event monitoring process that is associated with a web browser in the terminal corresponding to the ID. The above page sharing method, apparatus and system enable a user to operate without need to additionally open an instant messaging tool so as to avoid extra memory usage, increase memory utilization and improve the running speed of a mobile device.