Abstract: The present invention relates to a transition metal complex and a transition metal catalyst composition comprising the same for the preparation of an ethylene homopolymer or a copolymer of ethylene and ?-olefin. More particularly, it relates to a group IV transition metal catalyst having a cyclopentadiene derivative and at least one aryl oxide ligand in which an oxygen-containing heterocycle is fused at the ortho-position around a group IV transition metal, with no crosslinkage between the ligands, a catalyst composition comprising the transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and a process for preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same.

Abstract: The present invention relates to an arylphenoxy catalyst system producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group IV arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group IV transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes an environmentally-friendly raw material, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.

Abstract: Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group 4 arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadienyl derivative and arylphenoxide as fixed ligands are located around the group 4 transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes non-toxic raw materials, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.

Abstract: A wafer carrying apparatus or cassette is disclosed, which includes a binding or retention unit, so as to prevent wafers from being damaged by crash, inadvertent egress or exiting, and so on. The wafer carrying apparatus includes a main body provided with a plurality of wafer insertion grooves formed on inner sides and an opening formed on a front surface to take wafers in and out, a binding unit configured to move up and down on the front surface of the main body, its position relative to the insertion grooves being variable so as to close and open the insertion grooves, and a mechanism for varying the position of the binding unit relative to the insertion grooves, the mechanism being connected to the binding unit.

Abstract: The present invention relates to a transition metal complex and a transition metal catalyst composition comprising the same for the preparation of an ethylene homopolymer or a copolymer of ethylene and ?-olefin. More particularly, it relates to a group IV transition metal catalyst having a cyclopentadiene derivative and at least one aryl oxide ligand in which an oxygen-containing heterocycle is fused at the ortho-position around a group IV transition metal, with no crosslinkage between the ligands, a catalyst composition comprising the transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and a process for preparing an ethylene homopolymer or a copolymer of ethylene and ?-olefin using the same.

Abstract: Disclosed are a transition metal complex having a high catalytic activity for the preparation of an ethylene homopolymer or a copolymer of ethylene and ?-olefin and a catalyst composition comprising the same. More specifically, there are provided a transition metal complex having, around a group IV transition metal, a cyclopentadiene derivative and at least one aryl oxide ligand with a heterocyclic aryl derivative substituted at the ortho-position thereof, with no crosslinkage between the ligands, a catalyst composition comprising the transition metal complex and an organoaluminum compound or boron compound as cocatalyst, and a method for the preparation of high molecular weight ethylene homopolymers or copolymers of ethylene and ?-olefin using the same.

Abstract: A wafer carrying apparatus or cassette is disclosed, which includes a binding or retention unit, so as to prevent wafers from being damaged by crash, inadvertent egress or exiting, and so on. The wafer carrying apparatus includes a main body provided with a plurality of wafer insertion grooves formed on inner sides and an opening formed on a front surface to take wafers in and out, a binding unit configured to move up and down on the front surface of the main body, its position relative to the insertion grooves being variable so as to close and open the insertion grooves, and a mechanism for varying the position of the binding unit relative to the insertion grooves, the mechanism being connected to the binding unit.

Abstract: A wafer carrying apparatus or cassette is disclosed, which includes a binding or retention unit, so as to prevent wafers from being damaged by crash, inadvertent egress or exiting, and so on. The wafer carrying apparatus includes a main body provided with a plurality of wafer insertion grooves formed on inner sides and an opening formed on a front surface to take wafers in and out, a binding unit configured to move up and down on the front surface of the main body, its position relative to the insertion grooves being variable so as to close and open the insertion grooves, and a mechanism for varying the position of the binding unit relative to the insertion grooves, the mechanism being connected to the binding unit.

Abstract: Disclosed is a homogeneous catalyst system for producing an ethylene homopolymer or an ethylene copolymer with ?-olefin. Specifically, this invention pertains to a transition metal catalyst which has stability under high temperature solution polymerization at 120˜250° C., in which a cyclopentadiene derivative and an electron donating substituent, both of which are bonded to a Group IV transition metal acting as a central metal, are crosslinked through a silyl derivative substituted with a cyclohexyl, to a catalyst system including such a transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst, and to a method of producing an ethylene homopolymer or an ethylene copolymer with ?-olefin, having high molecular weight, using the catalyst system under conditions of high-temperature solution polymerization.

Abstract: The present invention relates to a bis-arylaryloxy catalyst system for the production of ethylene homopolymers or copolymers with ?-olefins, which has high catalytic activity. More particularly, it relates to a transition metal catalyst comprising a group-IV transition metal as a central metal, a cyclopentadiene derivative around the central metal, and two aryloxide ligands substituted with aryl derivatives at the ortho-positions, the ligands not being bridged to each other, as well as a catalyst system comprising said catalyst and an aluminoxane co-catalyst or a boron compound co-catalyst, and a method for producing high-molecular-weight ethylene homopolymers or copolymers with ?-olefins using the same.

Abstract: Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and ?-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and ?-olefins having a high molecular weight under a high temperature solution polymerization condition using the same. The catalyst system includes a group 4 arylphenoxy-based transition metal catalyst and an aluminoxane cocatalyst or a boron compound cocatalyst. In the transition metal catalyst, a cyclopentadiene derivative and arylphenoxide as fixed ligands are located around the group 4 transition metal, arylphenoxide is substituted with at least one aryl derivative and is located at the ortho position thereof, and the ligands are not crosslinked to each other. The catalyst includes non-toxic raw materials, synthesis of the catalyst is economical, and thermal stability of the catalyst is excellent.

Abstract: A generator of the present invention is formed of ring permanent magnet trains 2 and 2′ attached and fixed onto two orbits 1 and 1′ about a rotational axis 3, magnetic induction primary cores 4 and 4′ attached and fixed above outer peripheral surfaces of the ring permanent magnet trains 2 and 2′ at a predetermined distance from the outer peripheral surfaces, magnetic induction secondary cores 5 and 5′ attached and fixed onto the magnetic induction primary cores 4 and 4′ and each having two coupling, holes 6 and 6′ formed therein, tertiary cores 8 and 8′ inserted for coupling respectively into two coupling holes 6 and 6′ of each of the associated magnetic induction secondary cores 5 and 5′ opposite to each other, and responsive coils 7 and 7′.

Abstract: The present invention relates to use of rosmarinic acid and/or derivatives thereof as immunosuppressive agents and/or as inhibitor of SH2 domain function. Disclosed in the present invention is that rosmarinic acid and derivatives thereof specifically inhibit the binding of ligand peptides to Lck SH2 domain, disturb the Lck-mediated signal transduction in T cells, also inhibit cytoline gene expression, and suppress immune responses in the transplanted tissue. These activities of rosmarinic acid and derivatives thereof support their applicability to treatment, prevention and/or diagnosis of graft rejection, GVHD, autoimmune diseases, inflammatory diseases, etc.