Abstract: An oil-gas-water separation device has a main container, and a primary separation mechanism for a gas-liquid separation of the oil-gas field produced fluid. The primary separation mechanism has a liquid inlet pipe and a gas-liquid separation unit. A secondary separation zone, a tertiary separation zone and a collection zone are formed in the main container. The oil-gas-water separation device also include a secondary separation mechanism arranged in the secondary separation zone, for performing a primary oil-water separation on an oil-water mixture separated by the gas-liquid separation unit and entering the secondary separation zone; and a tertiary separation mechanism arranged in the tertiary separation zone, having a three-dimensional electrode unit capable of generating an uneven electric field to destabilize an oily produced water separated by the secondary separation mechanism to perform a secondary oil-water separation on the oily produced water.

Abstract: A method of fabrication of Ni electrodes by hydrogen bubbles dynamic templated electrodeposition of Ni on a substrate, the method comprising one of: i) selecting a current, and selecting an electrodeposition time at the selected current according to a deposit target thickness on the substrate; and ii) selecting an electrodeposition time, and selecting a current during the selected electrodeposition time according to the deposit target thickness on the substrate. The dynamic hydrogen bubble templated Ni films comprises micrometer-sized pores at a surface thereof, and pore walls having a cauliflower-like secondary structure.

Abstract: Provided is an ? amylase variant obtained by the mutation or deletion of at least one amino acid residue in the amino acid sequence of a parent ? amylase, and at the same time, same is an ? amylase maintaining the capability of the parent to hydrolyse ?-1,4 glycosidic bond, wherein the amino acid sequence homology of the two reaches 95% or more. A series of ? amylase variants provided therein have a relatively high catalytic activity under acidic conditions of pH 5.0 and high temperatures of at least 100° C.

Abstract: Provided is an ? amylase variant obtained by the mutation or deletion of at least one amino acid residue in the amino acid sequence of a parent ? amylase, and at the same time, same is an ? amylase maintaining the capability of the parent to hydrolyse ?-1,4 glycosidic bond, wherein the amino acid sequence homology of the two reaches 95% or more. A series of ? amylase variants provided therein have a relatively high catalytic activity under acidic conditions of pH 5.0 and high temperatures of at least 100° C.