摘要:
Provided are an apparatus and method for depositing a thin film on a substrate. The substrate is supported by a substrate holder. The substrate holder is seated on each of a plurality of holder seating grooves defined in a top surface of the susceptor. An injection hole for injecting a gas is defined in a top surface of each of the holder seating grooves. When a process is performed, the susceptor is rotated with respect to a central axis thereof, and the substrate holder is rotated with respect to a central axis of the substrate holder by the gas injected from the injection hole. A flow rate of the gas supplied onto an under surface of the substrate holder is adjusted according to a state of the substrate.
摘要:
The present invention relates to a method for producing a recombinant polynucleotides comprising the steps of generating a pool of unidirectional single-stranded polynucleotide fragments from two or more homologous double-stranded polynucleotides, conducting a polymerization process comprising multi-cyclic extension reactions using the unidirectional single-stranded polynucleotide fragments as templates and specific oligonucleotides as primers to obtain recombinant polynucleotides, and conducting a polymerase chain reaction using at least one primer to amplify the recombinant polynucleotides; and a method for constructing a recombinant DNA library comprising the steps of inserting the recombinant polynucleotide prepared by the above method into a vector and transforming an expression cell with said vector containing the recombinant polynucleotide to obtain a plurality of mutant clones. The method of the present invention can be used for in vitro recombination of homologous polynucleotides and the directed molecular evolution.
摘要:
A CPC acylase mutant of the present invention has an improved reactivity and specific activity to CPC, which can be efficiently employed for directly preparing 7-ACA from CPC by a one-step enzymatic method.
摘要:
The present invention relates to a composition for the prevention or treatment lipid metabolic disorders comprising fucoxanthin or marine plant extract comtaining the same as an effective indredients. Fucoxanthin or a marine plant extract comprising the same is effective in reducing weight increase and reducing triglyceride and cholesterol level in liver tissue, or plasma through inhibiting the synthesis of fatty acid and promoting the oxidation of fatty acid. Therefore, the composition comprising fucoxanthin or a marine plant extract comprising the same as an effective ingredient may be effectively used for the prevention and treatment of lipid metabolic disorders.