Abstract: The present disclosure discloses a genetically engineered strain, belonging to the technical field of bioengineering. L-amino acid oxidase genes, ?-keto acid decarboxylase genes, alcohol dehydrogenase genes, and enzyme genes capable of reducing NAD(P) to NAD(P)H are introduced into the genetically engineered strain of the present disclosure. The present disclosure further discloses a construction method and application of a recombinant Escherichia coli genetically engineered strain. When being applied to the biosynthesis of phenylethanoids, the method of the present disclosure has the characteristics of simple operation, low cost, and high synthesis efficiency and optical purity of the product, and has good industrialization prospects.

Abstract: Embodiments of this application provide a near-field wireless communication service processing method performed at a first computing device. While running a social networking application, the first computing device listens to a near-field wireless communication signal broadcasted by a second computing device. After detecting the near-field wireless communication signal broadcasted by the second computing device, first computing device processes the near-field wireless communication signal to obtain identification information associated with the second computing device. The first computing device sends the identification information associated with the second computing device to a remote server supporting the social networking application and obtains a preset service page corresponding to the identification information associated with the second computing device from the server, and displays the preset service page within the social networking application on the first computing device.

Abstract: The present invention relates to ?-asary-laldehyde ester. The chemical structure of the related ?-asary-laldehyde ester is of formula I.

Abstract: Provided are a tripeptide compound, a preparation method therefor, and an application thereof. The structure of the related compound is represented by formula (I). The provided compound has angiotensin converting enzyme inhibiting bioactivity, and the compound and a pharmaceutical composition thereof play a role in preventing and treating hypertension and other cardiocerebral vascular system diseases.

Abstract: The present invention relates to ?-asary-laldehyde ester, a preparation method therefor, and an application thereof. The chemical structure of the related ?-asary-laldehyde ester is represented by formula I. A related application is an application of the compound in preparation of drugs for calming, mind tranquillizing, senile dementia resisting, convulsion resisting, epilepsy resisting and depression resisting.

Abstract: Systems and methods are provided for online transaction verification. For example, a status of a commodity on flash sale is acquired; a verification code associated with the commodity on flash sale is acquired in response to the commodity on flash sale being purchasable; the verification code is output; an input voice password for flash sale is recorded; the voice password for flash sale is uploaded to a server for voice recognition, where order data is processed by the server in response to the uploaded voice password for flash sale matching with a predetermined verification code and a result related to the order data processing is returned; and the result is received and output.

Abstract: Systems and methods are provided for online transaction verification. For example, a status of a commodity on flash sale is acquired; a verification code associated with the commodity on flash sale is acquired in response to the commodity on flash sale being purchasable; the verification code is output; an input voice password for flash sale is recorded; the voice password for flash sale is uploaded to a server for voice recognition, where order data is processed by the server in response to the uploaded voice password for flash sale matching with a predetermined verification code and a result related to the order data processing is returned; and the result is received and output.

Abstract: The present invention relates to a compound of the formula (I), wherein R1, R2 and R3 are each independently selected from H, OH, F, Cl, Br, methoxy and ethoxy; or alternatively, R1 and R2 together form —OCH2O—, R3 is selected from H, OH, methoxy, ethoxy and halogens; R4 is OH or acyloxy; R5 is cycloalkoxyl, amino and substituted amino, and when R5 is selected from amino, at least one of R1, R2 and R3 is not H. The present invention further relates to a process for synthesizing a compound of the formula (I), and use of the compound of the formula (I) in the manufacture of a medicament for the prevention or treatment of cardiovascular or cerebrovascular diseases.

Abstract: The present invention relates to a compound of the formula (I), wherein R1, R2 and R3 are each independently selected from H, OH, F, Cl, Br, methoxy and ethoxy; or alternatively, R1 and R2 together form —OCH2O—, R3 is selected from H, OH, methoxy, ethoxy and halogens; R4 is OH or acyloxy; R5 is cycloalkoxyl, amino and substituted amino, and when R5 is selected from amino, at least one of R1, R2 and R3 is not H. The present invention further relates to a process for synthesizing a compound of the formula (I), and use of the compound of the formula (I) in the manufacture of a medicament for the prevention or treatment of cardiovascular or cerebrovascular diseases.