Abstract: A device for detecting soil nutrients on site, including an extracting grid, an on-site real-time detection assembly and a transfer assembly for transferring a soil extract from the extracting grid to the on-site real-time detection assembly. A soil nutrient detection method using the device and a microfluidic chip are also provided. The microfluidic chip includes a cover plate and a base plate. The base plate includes a soil extract feeding groove, a quantitative feeding groove, a reagent storage groove, and a serpentine groove.

Abstract: Provided are a boron-silicon heterocyclic compound having a structure represented by formula 1, a display device and a display apparatus. In formula 1, L1 and L2 are each a single bond, C6-C30 arylene, C6-C30 fused arylene, C4-C30 heteroarylene, or C4-C30 fused heteroarylene; D1 and D2 are each a substituted or unsubstituted C6-C60 aryl, a substituted or unsubstituted C4-C60 heteroaryl, a substituted or unsubstituted C10-C60 fused aryl, a substituted or unsubstituted C8-C30 fused heteroaryl, or a substituted or unsubstituted diphenylamino. The compound has a strong inductive effect and can reduce the driving voltage of the device. The silacyclopentadiene having a silicon atom as spiro-atom can effectively improve the solubility of the material, which is beneficial to the cleaning of the vapor deposition mask. In addition, the compound has a higher triplet energy level to effectively transfer energy to the luminous body, and improves the efficiency of the device.

Abstract: The present disclosure provides a high-activity memory-improving derivative peptide and use thereof in preparation of memory-improving medicaments, health care products or foods, and belongs to the field of biotechnology. According to the present disclosure, proline 3 (Pro3) of a pine nut high-activity memory-improving peptide, WYPGK, is completely substituted with common amino acids to obtain 19 derivative peptides, and the derivative peptides are subjected to molecular docking with mitochondrial deacetylase sirtuin 3 and are screened by binding energy to obtain derivative peptides WYEGK, WYKGK, WYSGK, and WYFGK; solid-phase chemical synthesis is conducted by a peptide synthesizer; the derivative peptides are purified by reversed phase high performance liquid chromatography (RP-HPLC) and prepared by electrospray ionization mass spectrometry (ESI-MS). Morris water maze for scopolamine-induced memory impairment model mice demonstrates that the derivative peptides have high memory-improving activity.

Abstract: The present disclosure provides a high-activity memory-improving derivative peptide and use thereof in preparation of memory-improving medicaments, health care products or foods, and belongs to the field of biotechnology. According to the present disclosure, proline 3 (Pro3) of a pine nut high-activity memory-improving peptide, WYPGK, is completely substituted with common amino acids to obtain 19 derivative peptides, and the derivative peptides are subjected to molecular docking with mitochondrial deacetylase sirtuin 3 and are screened by binding energy to obtain derivative peptides WYEGK, WYKGK, WYSGK, and WYFGK; solid-phase chemical synthesis is conducted by a peptide synthesizer; the derivative peptides are purified by reversed phase high performance liquid chromatography (RP-HPLC) and prepared by electrospray ionization mass spectrometry (ESI-MS). Morris water maze for scopolamine-induced memory impairment model mice demonstrates that the derivative peptides have high memory-improving activity.

Abstract: The present invention discloses a built-in tire pressure monitoring and alarming device. A housing is provided therein with a reference chamber and an inlet pipe extended from the reference chamber to a valve stem, and a reference chamber valve capable of sealing and opening the inlet pipe is mounted within the inlet pipe. A throttle core of the reference chamber valve is directly resisted against a core bar of a throttle core. During the tire is inflated, the throttle core is pushed open, the core bar of the throttle core is pushed against the valve core, and then the reference chamber valve is opened so that the reference chamber is inflated. After the inflation is accomplished, the throttle core is restored and the reference chamber valve is closed so that the reference chamber is sealed.

Abstract: Disclosed is a wireless speaker having a structure with the outer cover. The outer cover can be easily detached from the speaker body, facilitating user's mounting external electronic products as desired, for example, various types of bulbs, such as an LED or energy-saving lamp, and a wireless router or a camera. Also disclosed is a wireless speaker system, where the wireless set and the wireless speaker use wireless transmitting and receiving modules, or may use WiFi, Bluetooth or other wireless transmission modes. The wireless set supports a plurality of wireless speakers, and the wireless receiving speaker may be mounted on the ceiling, wall, or hidden place in a kitchen, living room, bedroom, bathroom or even bar, and restaurant; or even mounted on a table or floor lamp, or transportation means such as trains and planes, serving as a video and audio center for households and entertainment places by free combinations.

Abstract: The present invention discloses a built-in tire pressure monitoring and alarming device. A housing is provided therein with a reference chamber and an inlet pipe extended from the reference chamber to a valve stem, and a reference chamber valve capable of sealing and opening the inlet pipe is mounted within the inlet pipe. A throttle core of the reference chamber valve is directly resisted against a core bar of a throttle core. During the tire is inflated, the throttle core is pushed open, the core bar of the throttle core is pushed against the valve core, and then the reference chamber valve is opened so that the reference chamber is inflated. After the inflation is accomplished, the throttle core is restored and the reference chamber valve is closed so that the reference chamber is sealed.

Abstract: A wireless illuminative speaker system, comprising a wireless transmitter comprising a transmitter body, a wireless transmit module, a main board printed board circuit assembly (PCBA), and a support, and at least one wireless illuminative receiving speaker comprising a speaker body, an illuminating part, a speaker part, and a wireless receiving module. The wireless transmitter operates to obtain audio data from an external electronic device and to transmit the audio data in the form of wireless audio digital signals, the wireless transmit module is disposed in the transmitter body, the main board PCBA operates to control the wireless transmit module, the support operates to mount an audio playing device thereon, the wireless illuminative receiving speaker operates to receive the wireless audio digital signals from the wireless transmitter and to plays the received wireless audio digital signals after digital-to-analog conversion, and the illuminating part is disposed in the speaker body.

Abstract: Disclosed is a wireless speaker having a structure with the outer cover. The outer cover can be easily detached from the speaker body, facilitating user's mounting external electronic products as desired, for example, various types of bulbs, such as an LED or energy-saving lamp, and a wireless router or a camera. Also disclosed is a wireless speaker system, where the wireless set and the wireless speaker use wireless transmitting and receiving modules, or may use WiFi, Bluetooth or other wireless transmission modes. The wireless set supports a plurality of wireless speakers, and the wireless receiving speaker may be mounted on the ceiling, wall, or hidden place in a kitchen, living room, bedroom, bathroom or even bar, and restaurant; or even mounted on a table or floor lamp, or transportation means such as trains and planes, serving as a video and audio center for households and entertainment places by free combinations.

Abstract: A wireless illuminative speaker system, comprising a wireless transmitter comprising a transmitter body, a wireless transmit module, a main board printed board circuit assembly (PCBA), and a support, and at least one wireless illuminative receiving speaker comprising a speaker body, an illuminating part, a speaker part, and a wireless receiving module. The wireless transmitter operates to obtain audio data from an external electronic device and to transmit the audio data in the form of wireless audio digital signals, the wireless transmit module is disposed in the transmitter body, the main board PCBA operates to control the wireless transmit module, the support operates to mount an audio playing device thereon, the wireless illuminative receiving speaker operates to receive the wireless audio digital signals from the wireless transmitter and to plays the received wireless audio digital signals after digital-to-analog conversion, and the illuminating part is disposed in the speaker body.