Abstract: A method for forming a topological insulator structure is provided. A strontium titanate substrate having a surface (111) is used. The surface (111) of the strontium titanate substrate is cleaned by heat-treating the strontium titanate substrate in the molecular beam epitaxy chamber. The strontium titanate substrate is heated and Bi beam, Sb beam, Cr beam, and Te beam are formed in the molecular beam epitaxy chamber in a controlled ratio achieved by controlling flow rates of the Bi beam, Sb beam, Cr beam, and Te beam. The magnetically doped topological insulator quantum well film is formed on the surface (111) of the strontium titanate substrate. The amount of the hole type charge carriers introduced by the doping with Cr is substantially equal to the amount of the electron type charge carriers introduced by the doping with Bi.

Abstract: A topological insulator structure includes an insulating substrate and a magnetically doped TI quantum well film located on the insulating substrate. A material of the magnetically doped TI quantum well film is represented by a chemical formula of Cry(BixSb1-x)2-yTe3. 0.05<x<0.3, 0<y<0.3, and 1:2<x:y<2:1. The magnetically doped TI quantum well film is in 3 QL to 5 QL.

Abstract: An electrical device includes an insulating substrate and a magnetically doped TI quantum well film. The insulating substrate includes a first surface and a second surface. The magnetically doped topological insulator quantum well film is located on the first surface of the insulating substrate. A material of the magnetically doped topological insulator quantum well film is represented by a chemical formula of Cry(BixSb1-x)2-yTe3, wherein 0<x<1, 0<y<2, and values of x and y satisfies that an amount of a hole type charge carriers introduced by a doping with Cr is substantially equal to an amount of an electron type charge carriers introduced by a doping with Bi, the magnetically doped topological insulator quantum well film is in 3 QL thickness to 5 QL thickness.

Abstract: A topological insulator structure includes an insulating substrate and a magnetically doped TI quantum well film located on the insulating substrate. A material of the magnetically doped TI quantum well film is represented by a chemical formula of Cry(BixSb1-x)2-yTe3. 0<x<1, 0<y<2. Values of x and y satisfies that an amount of a hole type charge carriers introduced by a doping with Cr is substantially equal to an amount of an electron type charge carriers introduced by a doping with Bi. The magnetically doped TI quantum well film is in 3 QL to 5 QL.

Abstract: A method for generating quantum anomalous Hall effect is provided. A topological insulator quantum well film in 3QL to 5QL is formed on an insulating substrate. The topological insulator quantum well film is doped with a first element and a second element to form the magnetically doped topological insulator quantum well film. The doping of the first element and the second element respectively introduce hole type charge carriers and electron type charge carriers in the magnetically doped topological insulator quantum well film, to decrease the carrier density of the magnetically doped topological insulator quantum well film to be smaller than or equal to 1×1013cm?2. One of the first element and the second element magnetically dopes the topological insulator quantum well film. An electric field is applied to the magnetically doped topological insulator quantum well film to decrease the carrier density.

Abstract: The present invention provides a heat-resistance plant gene JAZ5a and use thereof. The inventors of the present invention isolated for the first time a heat resistance gene from the plant of Brassica spp., which can greatly improve the heat-resistance ability of the plant, especially in the bolting stage. The present invention further provides a protein encoded by said gene and its preparation method, vectors and host cells containing said gene, and a method for preparing a transgenic plant containing said gene.

Abstract: Provided herein are methods for producing a biomolecule by converting or engineering a plurality of cells, e.g., mammalian cells, having an endogenous precursor of a biomolecule to cells transfected to contain a nucleic acid that stably overexpresses a hybrid enzyme effective to metabolized the precursor to the biomolecule in the cell, e.g., prostacyclin produced from arachidonic acid. Also provided are methods of treating a pathophysiological condition associated with at least a decrease in the biomolecule or treating a vascular disease by administering the engineered, stably transfected mammalian cells to a subject where production of the biomolecule treats the condition or vascular disease. Further provided are the recombinant hybrid enzymes and the engineered cell lines and pharmaceutical compositions thereof, the nucleic acids encoding the hybrid enzymes, and vectors comprising the nucleic acids.

Abstract: A recombinant 130-kDa protein is constructed by linking together human cyclooxygenase (COX) isoform-2 (COX-2) and prostacyclin synthase (PGIS), via a 10-20 amino acid residues of a transmembrane sequence. The engineered protein is expressed in cells, and adopts the functions of COX and PGIS, to continually convert arachidonic acid (AA) into prostaglandin G2 (catalytic step 1), prostaglandin H2 (catalytic step 2) and prostacyclin (PGI2; catalytic step 3).

Abstract: A method of lossless data compression is provided which uses a grammar transform to sequentially construct a sequence of greedy context-dependent grammars from which an original data sequence can be recovered incrementally. The data sequence is encoded using any one of a sequential context-dependent method, an improved sequential context-dependent method, and a hierarchical context-dependent method.

Abstract: A method of lossless data compression is provided which uses a grammar transform to sequentially construct a sequence of greedy context-dependent grammars from which an original data sequence can be recovered incrementally. The data sequence is encoded using any one of a sequential context-dependent method, an improved sequential context-dependent method, and a hierarchical context-dependent method.