Abstract: Methods for synthesizing and using R-hydroxynitrile lyase derived from mango. Specifically, a variety of mutant cyanohydrin lyases were obtained by mutating a wild-type hydroxynitrile lyase gene, adding an enzyme cleavage site thereto, preparing a recombinant plasmid by inserting the mutated wild-type hydroxynitrile lyase gene into a vector, introducing the recombinant plasmid into a strain of bacteria, and secreting and expressing the R-hydroxynitrile lyase in the strain. The method Is safe, simple and easy to operate.

Abstract: A method for preparation of and use of R-hydroxynitrile lyase derived from mango. Specifically, a variety of mutant cyanohydrin lyases were obtained by constructing random mutation and site-saturation mutagenesis libraries and high-throughput screening, and the method was safe, simple and easy to operate.

Abstract: An image processing method to reduce access pressure of each image in an image set, where the image processing method includes obtaining a quantity of times each image layer in an image set is accessed, determining one or more first image layers, where a quantity of times the first image layer in the image set is accessed is greater than a first threshold, and the first image layer has at least two child image layers, generating a copy of the first image layer, and modifying some child image layers of the first image layer to child image layers of the copy of the first image layer.

Abstract: An image processing method to reduce access pressure of each image in an image set, where the image processing method includes obtaining a quantity of times each image layer in an image set is accessed, determining one or more first image layers, where a quantity of times the first image layer in the image set is accessed is greater than a first threshold, and the first image layer has at least two child image layers, generating a copy of the first image layer, and modifying some child image layers of the first image layer to child image layers of the copy of the first image layer.