Abstract: Provided are an esterase mutant and use thereof. The amino acid sequence of the esterase mutant has a sequence as shown in SEQ ID NO: 1, and sites at which amino acid mutations occur include an N51G site.

Abstract: The present application relates to a smoke detection method based on deep learning, a device and a storage medium. The method includes the following steps: performing image enhancement processing and color transfer processing on a smoke image to obtain a color transferred smoke image; superimposing the color transferred smoke image on an indoor image to obtain an initial image, and performing screening processing, detection frame updating processing, feature extraction and layer calibration processing on the initial image to obtain a smoke calibrated feature image; performing segmentation processing, detection frame prediction processing, detection frame classification processing and image classification processing on the smoke calibrated feature image in sequence to obtain a smoke image set; and screening the smoke image set to obtain a target smoke image, and outputting a smoke detection result. The present disclosure realizes the collection of smoke data sets and improves the detection accuracy of smoke.

Abstract: The present invention provides a class of new mutant proteins for increasing malic acid yield. Specifically, the present invention provides a class of new pyruvate carboxylase mutant protein and malic acid transporter mutant proteins or combinations thereof, a preparation method therefor and use thereof in improving malic acid yield.

Abstract: The present invention relates to the field of genetic engineering, particularly to a fumonisin degrading enzyme FumDPS, gene and application thereof. The present invention provides a fumonisin degrading enzyme FumDPS from Pigmentiphaga sp. which has the amino acid sequence of SEQ ID NO: 1, has the optimum temperature of 37° C., and the optimum pH of 8 to 9, remains more than 60% of the activity in the range of pH 3 to 7, and has 100% of degradation rate of fumonisin B1 at the optimum temperature and pH.