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: Disclosed is an organic electroluminescence device. The organic electroluminescence device has an organic layer having a specific combination in which a hole transporting material is doped with a p-type conductive doped material. The organic electroluminescence device can provide better device performance, such as lifetime improvement and voltage reduction.

Abstract: Provided are a lipase mutant and use thereof. The amino acid sequence of the lipase mutant has a sequence shown in SEQ ID NO: 1, that is, sites at which amino acid mutations occur include a V154L site.

Abstract: The present disclosure provides a food for hangover and liver protection and a producing method thereof. The method includes: providing the raw materials of particular percentages by weight, wherein the prepared turmeric powder accounts for 25%-35% of the provided raw materials; the prepared kudzu isoflavone powder accounts for 30%-40% of the provided raw materials; the prepared Primula sieboldii root powder accounts for 20%-30% of the provided raw materials; the prepared fruit extract accounts for 5%-14% of the provided raw materials; and the prepared vitamin complex accounts for 1%-2% of the provided raw materials; performing a sieving pretreatment on each of the provided raw materials; putting the pretreated raw materials into a wet granulator to perform a mix process for obtaining the food; and performing a testing process on the mixed food, and re-performing the mix process on the tested food in response to the tested food being unqualified.

Abstract: The present disclosure relates to the field of functional foods, and particularly relates to an anti-hair loss solid beverage and a preparation method thereof. The anti-hair loss solid beverage includes the following raw materials in percentage by mass: 4% to 6% of lytodark, 35% to 48% of non-dairy creamer, 5.5% to 7% of vegetable fat powder, 40% to 54% of maltodextrin, 0.5% to 1% of sucralose, and 0.5% to 1.5% of essence. The lytodark is prepared from nucleoprotein peptide, coffee fruit extract, and pumpkin seed oil.

Abstract: The present disclosure relates to the field of functional foods, and particularly relates to an anti-hair loss solid beverage and a preparation method thereof. The anti-hair loss solid beverage includes the following raw materials in percentage by mass: 4% to 6% of lytodark, 35% to 48% of non-dairy creamer, 5.5% to 7% of vegetable fat powder, 40% to 54% of maltodextrin, 0.5% to 1 % of sucralose, and 0.5% to 1.5% of essence. The lytodark is prepared from nucleoprotein peptide, coffee fruit extract, and pumpkin seed oil.

Abstract: An antidepressant food and a method for preparing the same are provided. The antidepressant food includes, by mass percentage, Semen ziziphi spinosae powder in a range of 28% to 36%, ?-aminobutyric acid in a range of 10% to 15%, theanine in a range of 15% to 20%, phosphatidylserine in a range of 10% to 20%, Ficus tikoua extract in a range of 8% to 14%, Huperzia serrata extract in a range of 10% to 16%, sucralose in a range of 0.5% to 1% and fruit essence in a range of 0.5% to 1.5%.

Abstract: An antidepressant food and a method for preparing the same are provided. The antidepressant food includes, by mass percentage, Semen ziziphi spinosae powder in a range of 28% to 36%, ?-aminobutyric acid in a range of 10% to 15%, theanine in a range of 15% to 20%, phosphatidylserine in a range of 10% to 20%, Ficus tikoua extract in a range of 8% to 14%, Huperzia serrata extract in a range of 10% to 16%, sucralose in a range of 0.5% to 1% and fruit essence in a range of 0.5% to 1.5%.

Abstract: The invention relates to a guide RNA (gRNA) comprising a guide sequence capable of targeting a Cas9 protein to a target sequence in an ICP6 gene of type 1-herpes simplex virus (HSV-1) to provide a specific cleavage event, wherein the target sequence comprises a GATC insertion as compared to a wild-type HSV-1. The invention also relates to a HSV-1 gene-editing system and a gene-editing method for generating a desired recombinant HSV-1 by using said gRNA.

Abstract: Disclosed is an organic electroluminescence device. The organic electroluminescence device has an organic layer having a specific combination in which a hole transporting material is doped with a p-type conductive doped material. The organic electroluminescence device can provide better device performance, such as lifetime improvement and voltage reduction.

Abstract: A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port is formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.

Abstract: An integrated hole sealing, device includes a capsule plug, an outer capsule having a first hole site, an inner capsule having a second hole site, a capsule water injection pipe, a borehole water injection pipe and a tapered plug. Two ends of the outer capsule and the inner capsule are respectively fixed on the capsule plug and the tapered plug. The capsule plug, the tapered plug, the outer capsule and the inner capsule form a closed hollow cylindrical cavity. A middle part of the inner capsule is a hollow pipeline, and two ends thereof respectively correspond to the first and second hole sites. The borehole water injection pipe passes through the hollow cylindrical cavity. A part, located in the hollow cylindrical cavity, of the borehole water injection pipe is telescopically wound outside the inner capsule. The capsule water injection pipe passes through the capsule plug and extends into the hollow cylindrical cavity.

Abstract: A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.

Abstract: An integrated hole sealing, device includes a capsule plug, an outer capsule having a first hole site, an inner capsule having a second hole site, a capsule water injection pipe, a borehole water injection pipe and a tapered plug. Two ends of the outer capsule and the inner capsule are respectively fixed on the capsule plug and the tapered plug. The capsule plug, the tapered plug, the outer capsule and the inner capsule form a closed hollow cylindrical cavity. A middle part of the inner capsule is a hollow pipeline, and two ends thereof respectively correspond to the first and second hole sites. The borehole water injection pipe passes through the hollow cylindrical cavity. A part, located in the hollow cylindrical cavity, of the borehole water injection pipe is telescopically wound outside the inner capsule. The capsule water injection pipe passes through the capsule plug and extends into the hollow cylindrical cavity.