Abstract: The present disclosure provides a display device and a volume adjustment method. The display device includes: a display, a user interface, a communicator, a memory, and at least one processor. The at least one processor is configured for: receiving a first volume adjustment instruction; adjusting the volume of the display device according to the first volume adjustment instruction, and acquiring a first volume value and a second volume value where the display device has established a Bluetooth connection with a hearing aid supporting a HAS; and when determining according to the first volume value and the second volume value that a condition for adjusting the volume of the hearing aid is met, acquiring the loudness of ambient sounds; generating a second volume adjustment instruction according to the loudness of the ambient sounds; and sending the second volume adjustment instruction to the hearing aid by means of the Bluetooth connection.

Abstract: Provided in the disclosure are a display apparatus and a sound processing method thereof. The method includes: obtaining a control instruction for outputting an audio signal; in response to the control instruction, detecting a current audio output mode, the audio output mode including a normal mode and/or a low-latency mode; receiving audio data from a first external device in connection with the display apparatus via an external device interface, where a data format of the audio data is determined according to the audio output mode; based on that the audio output mode is the low-latency mode, performing a first type of sound effect processing on the audio data; and based on that the audio output mode is the normal mode, performing a second type of sound effect processing on the audio data.

Abstract: The present disclosure relates to the technical fields of agriculture and environmental microbiology, and provides Agrobacterium for reducing uptake of heavy metals by wheat. The Agrobacterium is strain NJ20, which is deposited in China General Microbiological Culture Collection Center under Accession CGMCC No. 26197. The present disclosure also provides a bacterial agent which is prepared by the aforementioned Agrobacterium. The Agrobacterium and bacterial agent thereof are used for reducing uptake of heavy metals in heavy metal contaminated soil by wheat. The strain NJ20 of the present disclosure can grow well under the stress of lead and cadmium, and remove soluble lead and cadmium in the culture solution by adsorption; meanwhile the strain NJ20 can generate indoleacetic acid, dissolve insoluble tricalcium phosphate and improve phosphorus nutrition in soil. Inoculation of the strain NJ20 into heavy metal contaminated soil can reduce the contents of lead and cadmium in wheat grains and straws.

Abstract: The present invention provides a method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction.

Abstract: The present disclosure discloses a catalyst composition for polymerization of an ?-olefin and preparation and use thereof. The catalyst composition comprises boron trifluoride and at least one protic cocatalyst; the protic cocatalyst has a structural formula of X—(CH2)n—OH, where n is an integer selected from 1 to 10; X is selected from nitro, halogen, cyano, sulfonic acid group, aldehyde group, acyl, carboxyl and amino. The catalyst can be used in production of a poly(?-olefin) synthetic base oil, and is particularly suitable for a low viscosity poly(?-olefin) synthetic base oil with high selectivity of the target product.

Abstract: A growth-promoting bacterial agent capable of improving content of soybean oil, preparation method, and use thereof are provided. The growth-promoting bacterial agent is fermented by a DW1 strain, the classification name of the DW1 strain is Bacillus sp., the DW1 strain is deposited in the China Center for Type Culture Collection on Jul. 16, 2021, and the deposit number is CCTCC NO: M 2021889. The growth-promoting bacterial agent of the present disclosure has the ability to dissolve insoluble phosphorus and insoluble potassium and can increase content of readily available phosphorus and readily available potassium in the soil, which has an obvious promoting effect on the growth of soybean and improves soybean yield. The growth-promoting bacterial agent of the present disclosure promotes bacteria and can significantly improve the content of soybean oil. At the same time, it has an affinity of soybean agglutinin and can agglutinate with the soybean agglutinin.

Abstract: A growth-promoting bacterial agent capable of improving content of soybean oil, preparation method, and use thereof are provided. The growth-promoting bacterial agent is fermented by a DW1 strain, the classification name of the DW1 strain is Bacillus sp., the DW1 strain is deposited in the China Center for Type Culture Collection on Jul. 16, 2021, and the deposit number is CCTCC NO: M 2021889. The growth-promoting bacterial agent of the present disclosure has the ability to dissolve insoluble phosphorus and insoluble potassium and can increase content of readily available phosphorus and readily available potassium in the soil, which has an obvious promoting effect on the growth of soybean and improves soybean yield. The growth-promoting bacterial agent of the present disclosure promotes bacteria and can significantly improve the content of soybean oil. At the same time, it has an affinity of soybean agglutinin and can agglutinate with the soybean agglutinin.

Abstract: The present invention provides a low viscosity poly-?-olefin lubricating oil and a synthesis method thereof. The method comprises: (1) the ?-olefin raw material is subjected to dehydration treatment so that the water content in the raw material is ?10 ppm; (2) a reaction of the dehydration treated ?-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3 to obtain a reaction product, wherein the pressure of the gaseous BF3 is 0.01 to 1 MPa; (3) the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted ?-olefin raw material and ?-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off.

Abstract: A phosphate-solubilizing microbial agent for maize is provided. The phosphate-solubilizing microbial agent is obtained by fermentation of a strain CR50; and the strain CR50 is Bacillus stratosphericus (B. stratosphericus), which was deposited in the China Center for Type Culture Collection (CCTCC) on Nov. 10, 2020, with a deposit number of CCTCC M 2020721. The phosphate-solubilizing microbial agent has the ability to solubilize insoluble inorganic phosphorus and insoluble organic phosphorus such as calcium phosphate and calcium phytate, which can increase an available phosphorus content in soil, significantly promote the growth of maize, and increase a maize yield. The phosphate-solubilizing strain also has the ability to produce indoleacetic acid (IAA) and siderophore, and can undergo an agglutination reaction with maize agglutinin due to maize agglutinin affinity. The strain CR50 can colonize at maize roots for a long time under the mediation of agglutinin and stably exert the growth-promoting effect.

Abstract: The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C10+.

Abstract: The present invention provides a low viscosity poly-?-olefin lubricating oil and a synthesis method thereof. The method comprises: (1) the ?-olefin raw material is subjected to dehydration treatment so that the water content in the raw material is ?10 ppm; (2) a reaction of the dehydration treated ?-olefin raw material is carried out in the presence of a complex catalyst and gaseous BF3 to obtain a reaction product, wherein the pressure of the gaseous BF3 is 0.01 to 1 MPa; (3) the reaction product obtained in step (2) is sequentially subjected to flash distillation, gas stripping, centrifugation, and washing treatment to obtain an intermediate product; (4) the intermediate product obtained in step (3) is subjected to distillation under reduced pressure to separate the unreacted ?-olefin raw material and ?-olefin dimers, and the remaining heavy fractions are subjected to hydrogenation saturation treatment followed by fractionation and cutting-off.

Abstract: The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C10+.

Abstract: Disclosed in the disclosure are a pyrazolo [1,5-a] pyrideine compound with structural features as shown in formula (I) or a pharmaceutically acceptable salt, stereoisomer or prodrug molecule thereof and a use thereof. Such compounds have a good in vitro antituberculosis activity, and the minimal inhibitory concentration (MIC) of the compounds is lower than 0.1 ?g/mL and partially achieves 0.01 ?g/mL, and have a very strong inhibiting effect on clinically selected multi-drug resistant tuberculosis (MDR-TB) strains. In an in vivo experiment, the pyrazolo[1,5-a] pyrideine compounds of the present disclosure can effectively scavenge the infectious dose of H37Ra in a mouse body at 20 mg/kg/d does, thereby being a new type of antituberculosis compound.

Abstract: Disclosed in the disclosure are a pyrazolo[1,5-a]pyrideine compound with structural features as shown in formula (I) or a pharmaceutically acceptable salt, stereoisomer or prodrug molecule thereof and a use thereof. Such compounds have a good in vitro antituberculosis activity, and the minimal inhibitory concentration (MIC) of the compounds is lower than 0.1 ?g/mL and partially achieves 0.01 ?g/mL, and have a very strong inhibiting effect on clinically selected multi-drug resistant tuberculosis (MDR-TB) strains. In an in vivo experiment, the pyrazolo[1,5-a]pyrideine compounds of the present disclosure can effectively scavenge the infectious dose of H37Ra in a mouse body at 20 mg/kg/d does, thereby being a new type of antituberculosis compound.