Abstract: Provided are a method of preparing a malononitrile oxime ether compound and an intermediate compound. The malononitrile oxime ether compound has a structure as shown in formula (VII), wherein W is selected from aryl or heteroaryl. The preparation method comprises: reacting a first raw material with a second raw material in the presence of a first solvent and a catalyst to obtain the intermediate compound, wherein the first raw material has a structure as shown in formula (IV), and the second raw material has a structure as shown in formula (V); and subjecting the intermediate compound, and a dehydrant to a dehydration reaction in the present of a second solvent to obtain the malononitrile oxime ether compound. Furthermore, the malononitrile oxime ether compound is obtained through one-step dehydration reaction. using the preparation method, is advantageous for improving the yield of malononitrile oxime ethers and reducing the cost.

Abstract: Disclosed are a method and device for winding a foil coil of a stereoscopic wound iron core transformer. The device includes a rotating assembly, a driving device and a plurality of loading assemblies; the rotating assembly is provided with a through hole matched with an iron core post, the rotating assembly is provided with a gear plate and a track ring around the through hole, and the gear plate and the track ring are fixedly connected by a fixing block; the loading assembly includes a cylinder and a tension device, and the cylinder is movably connected with the rotating assembly; and a driving end of the driving device is connected with the gear plate.

Abstract: A winding die is disclosed, including: a gear baffle, where a middle portion of the gear baffle is provided with a first opening for placing an iron core post, and the gear baffle is provided with a first surface; and a cylinder, where the cylinder is arranged on the first surface of the gear baffle and connected with the gear baffle. The middle portion of the gear baffle is provided with the first opening for placing the iron core post, the gear baffle is fixedly connected with the cylinder, an external device is connected with a gear, and the cylinder on the gear baffle is driven to rotate around the iron core post by pulling the gear, so that a foil or an insulating material on the cylinder can be wound on the iron core post, finally realizing a foil winding.

Abstract: A winding cylinder of a stereoscopic wound iron core transformer is disclosed, including an outer cylinder, an inner cylinder and a tension assembly. The outer cylinder is movably connected with the inner cylinder through a bearing assembly, and the outer cylinder rotatable around an axis of the inner cylinder. The tension assembly includes a screw, a spring and a connecting assembly. The connecting assembly includes a fixing portion, a friction portion and a transmission portion, the friction portion and the transmission portion are both arranged around the inner cylinder, and the transmission portion is fixedly connected with the outer cylinder. A side face of the inner cylinder is provided with a through hole, and the fixing portion penetrates through the through hole and is fixedly connected with the friction portion.

Abstract: A method for producing a cold-water-soluble starch. The method includes: 1) adding a starch and 3-45 wt. % of an ethanol aqueous solution to a container, and stirring a mixture of the starch and the ethanol aqueous solution in the container, thus yielding a starch-ethanol-water; 2) introducing the starch-ethanol-water to an extruder and producing a noodle extrudate, where the extruder comprises 3 continuous temperature control areas: a first area having a temperature of 50° C., a second area having a temperature of between 95 and 120° C., and a third area having a temperature of 60° C.; a rotation speed of the extruder is 70-150 rpm; and the noodle extrudate has a diameter of 0.2-0.5 cm; 3) pressing and roll slitting the noodle extrudate, thus yielding a plurality of slices; and 4) drying the plurality of slices in a microwave vacuum oven, cooling, and pulverizing the plurality of slices.

Abstract: A hand tool is sleeved in a detachable handle case. The hand tool includes an elongated handle and a tool head extended from a first end of the handle, wherein the handle has a peripheral surface and a first retention structure formed thereon. The detachable handle case includes a handle sleeve having a hollow structure for receiving the handle of the hand tool therein and defining an inner surface and an outer surface. The handle sleeve includes an anti-slip arrangement formed at the outer surface and a second retention structure formed on the inner surface to engage with the first retention structure for preventing a relative movement between the handle sleeve and the handle.

Abstract: The disclosure provides a modified cyclodextrin/mesoporous silica for adsorbing Pb and Cd and application thereof, belonging to the technical field of adsorbent materials. By using surface modification, chloroacetic acid is used as anions, and a modified cyclodextrin is grafted onto a surface of a cyclodextrin/mesoporous silica by nucleophilic substitution to prepare the modified cyclodextrin/mesoporous silica adsorbent material. The modified cyclodextrin/mesoporous silica adsorbent material prepared in the disclosure has the advantages of simple preparation method, strong adsorbability, easy separation, good biocompatibility and the like. When the material is used as an adsorbent to adsorb heavy metal ions Pb2+ and Cd2+, maximum removal rates can reach 97.8% and 81.29% respectively. Therefore, the material has wide application prospects in removal of heavy metals in sewage and the like, thereby improving the water environment that people depend on for survival.

Abstract: A method for screening adulteration of fibrate anti-hyperlipidemia chemicals in tea by combined method of high performance thin layer chromatography (HPTLC) and bioluminescence, which belongs to the field of food inspection. The method includes: firstly, formulating standard solutions of bezafibrate and ciprofibrate, and preparing a tea sample; pre-washing a thin-layer plate and then performing HPTLC spotting; performing HPTLC separation to move original mixed target objects mixed originally onto different positions of the thin-layer plate according to different molecular structures, so as to form a physical isolation; and subsequently, simultaneous detection of multiple targets in the tea sample could be realized conveniently through luminous bacteria coupled with the thin-layer plate by an immersed manner.

Abstract: The disclosure herein relates to a method for preparing branched cyclodextrin and application thereof, and belongs to the technical field of synthesis of branched cyclodextrin. The method comprises the following steps: (1) dissolving maltodextrin in a phosphate buffer solution, and adding CGTase for reacting; (2) reducing enzyme activity by a physical method; and (3) adding a saccharifying enzyme to the reaction system of step (2), and performing high-temperature enzyme deactivation to obtain the branched cyclodextrin. The method has mild reaction conditions, and at the same time, cyclodextrin and unreacted substrates can be hydrolyzed via the weak coupling activity of CGTase, thereby realizing effective separation of the branched cyclodextrin.

Abstract: A method for producing a cold-water-soluble starch. The method includes: 1) adding a starch and 3-45 wt. % of an ethanol aqueous solution to a container, and stirring a mixture of the starch and the ethanol aqueous solution in the container, thus yielding a starch-ethanol-water; 2) introducing the starch-ethanol-water to an extruder and producing a noodle extrudate, where the extruder comprises 3 continuous temperature control areas: a first area having a temperature of 50° C., a second area having a temperature of between 95 and 120° C., and a third area having a temperature of 60° C.; a rotation speed of the extruder is 70-150 rpm; and the noodle extrudate has a diameter of 0.2-0.5 cm; 3) pressing and roll slitting the noodle extrudate, thus yielding a plurality of slices; and 4) drying the plurality of slices in a microwave vacuum oven, cooling, and pulverizing the plurality of slices.

Abstract: A carbon skeleton reinforced porous starch and a preparation method thereof. The method of preparing the porous starch includes bonding starch to transition metal ions, then treating the starch attached with the transition metal ions and amylase via an extruding device, and finally forming a starch-based porous material having a high strength recombination structure, that is, the carbon skeleton reinforced porous starch.

Abstract: The array induced electric field fluid reaction system includes a reaction unit array with a plurality of reaction units interactively connected as a network configuration, a power supply and a sample container, wherein each reaction unit has a closed iron core, a primary coil and a secondary coil. The primary coil and secondary coil are, respectively, wound around two sides of the closed iron core, and the secondary coil has an insulation pipe for circulating the reaction medium. When the array induced electric field fluid reaction system operates, no charged needle-type electrodes or electrode plates are inserted into the reaction medium. Electrochemical reaction and metal contamination may be avoided. The reaction units can form an array network connection and series/parallel connection, and when the induced electric field in each reaction unit is acted on the reaction medium, specific reaction effects may be achieved.

Abstract: A novel composite crossarm for utility poles comprising a honeycomb structure filler inside the novel composite crossarm to increase bending resistance strength of the composite crossarm and improve crush resistance performance to prevent the composite crossarm from deforming when an insulator bolt is excessively screwed. Filling the composite crossarm with the honeycomb structure filler can also improve twisting resistance performance of the composite crossarm.

Abstract: The present invention discloses a multi-series continuous-flow magnetoelectric coupling processing system and applications thereof. The processing system comprises multi-series of induction units, a power supply and a feed liquid container, wherein each series of the induction unit comprises a closed iron core, a primary coil wound around one side of the closed iron core, and a secondary coil wound around the other side of the closed iron core and arranged in an induction cavity, the secondary coil comprises an insulation pipe for circulation of feed liquid, and the two ends of the insulation pipe are exposed from the induction cavity and are respectively acted as a feeding hole and a discharge hole; the power supply is in parallel connection with each primary coil in the induction unit and provides excitation voltage to each primary coil; and the feed liquid container is in series connection with the insulation pipes of the multi-series induction units to form a feed liquid circulation loop.

Abstract: An anti-loosening endcap for utility crossarm comprising an endcap body inserted into the crossarm, where a channel perpendicular to an inner wall of the crossarm is disposed inside the endcap body, one end of the channel is open, the pointed head pin is slidably disposed in the channel, the pointed head of the pointed head pin faces the inner wall of the crossarm, the endcap is further provided with an axial through passage, the passage and the channel intersect at the tail portion of the pointed head pin, and the corresponding pin is provided for the passage. The pin is driven into the passage, and the pin presses the tail portion of the pointed head pin, so that the pointed head of the pointed head pin pierces the inner wall of the crossarm, thereby providing a locking effect.

Abstract: The disclosure herein relates to a method for preparing branched cyclodextrin and application thereof, and belongs to the technical field of synthesis of branched cyclodextrin. The method comprises the following steps: (1) dissolving maltodextrin in a phosphate buffer solution, and adding CGTase for reacting; (2) reducing enzyme activity by a physical method; and (3) adding a saccharifying enzyme to the reaction system of step (2), and performing high-temperature enzyme deactivation to obtain the branched cyclodextrin. The method has mild reaction conditions, and at the same time, cyclodextrin and unreacted substrates can be hydrolyzed via the weak coupling activity of CGTase, thereby realizing effective separation of the branched cyclodextrin.

Abstract: The present invention discloses a circulating magnetoelectric-induction reaction system and application thereof. The system comprises an alternating induction voltage unit, an alternating induction magnetic field unit, a low-frequency power supply, and a feed liquid container. The alternating induction voltage unit is mainly composed of a closed iron core, a primary coil, a secondary coil, and an induction voltage cavity. The alternating induction magnetic field unit is mainly composed of a C-shaped iron core, a primary coil, and a magnetic field cavity. The low-frequency power supply is connected to the primary coils in the alternating induction voltage unit and the alternating induction magnetic field unit and provides excitation voltage for the primary coils. The secondary coil comprises an insulating pipeline, which serves as a feed liquid circulating pipeline, and has both ends exposed out of the induction voltage cavity, with one end as a feed inlet and the other as a discharge outlet.

Abstract: The array induced electric field fluid reaction system comprises a reaction unit array with a plurality of reaction units interactively connected as a network configuration, a power supply and a sample container, wherein each reaction unit has a closed iron core, a primary coil and a secondary coil. The primary coil and secondary coil are, respectively, wound around two sides of the closed iron core, and the secondary coil comprises an insulation pipe for circulating the reaction medium. When the array induced electric field fluid reaction system operates, no charged needle-type electrodes or electrode plates are inserted into the reaction medium. Electrochemical reaction and metal contamination may be avoided. The reaction units can form an array network connection and series/parallel connection, and when the induced electric field in each reaction unit is acted on the reaction medium, specific reaction effects may be achieved.

Abstract: The present disclosure discloses a fluorescent starch nanocrystal and a preparation method and application thereof. Mainly based on the character that starch nanocrystal has an active hydroxyl group on the surface, the present disclosure introduces fluorescein isothiocyanate into the surface of the starch nanocrystal in the form of stable covalent bonds through a two-step chemical modification method: silane coupling and electrophilic addition of fluorescein, so as to prepare the starch nanocrystal with fluorescent properties. The preparation process of the present disclosure is simple and easy to operate, uses cheap and readily available raw materials, involves low cost, and allows the non-fluorescent starch nanocrystal to produce significant fluorescent properties without affecting the properties of the starch nanocrystal itself, thereby expanding the application of starch.

Abstract: The present invention discloses a circulating magnetoelectric-induction reaction system and application thereof. The system comprises an alternating induction voltage unit, an alternating induction magnetic field unit, a low-frequency power supply, and a feed liquid container. The alternating induction voltage unit is mainly composed of a closed iron core, a primary coil, a secondary coil, and an induction voltage cavity. The alternating induction magnetic field unit is mainly composed of a C-shaped iron core, a primary coil, and a magnetic field cavity. The low-frequency power supply is connected to the primary coils in the alternating induction voltage unit and the alternating induction magnetic field unit and provides excitation voltage for the primary coils. The secondary coil comprises an insulating pipeline, which serves as a feed liquid circulating pipeline, and has both ends exposed out of the induction voltage cavity, with one end as a feed inlet and the other as a discharge outlet.