Abstract: Provided is a composition including a fraction of the Syzygium formosum extract as an active ingredient, which inhibits the expression of inflammatory cytokines to prevent, ameliorate, or treat inflammation disease, and when the composition is included in cosmetics, the prepared cosmetics may have high stability.

Abstract: The present disclosure relates to inotodiol as a liver X receptor agonist and use thereof for the treatment of a liver X receptor-mediated disease. Inotodiol according to an aspect, or a prodrug thereof has LXR?-specific agonist activity, and thus not only has remarkable safety compared to other LXR agonists, but can also be effectively used in the treatment of LXR-related diseases, such as a neurodegenerative brain disease, an autoimmune disease, NASH, and NAFLD.

Abstract: The present disclosure relates to an ester derivative prodrug of inotodiol and use thereof. The prodrug not only has increased solubility with respect to an inorganic solvent and an organic solvent, but also has improved stability, and thus can be used in the treatment of various inflammatory diseases, including inflammatory diseases or allergic diseases.

Abstract: Provided is a composition for skin whitening, including a Syzygium formosum extract as an active ingredient. The Syzygium formosum extract has excellent tyrosinase inhibitory activity, and thus can be usefully used as a cosmetic composition for skin whitening or a composition for preventing or alleviating melanin hyperpigmentation diseases. In addition, the Syzygium formosum extract has excellent antibacterial and antiatopic activities, thereby being useful as an antibacterial and antiatopic composition.

Abstract: Disclosed is a metallocene catalyst composition for polyolefin polymerization. The metallocene catalyst composition is in a non-supported, heterogeneous form where an ansa-metallocene is bound to a cocatalyst without a support. Also, a method for preparing the catalyst composition, and a method for preparing polyolefin using the catalyst are disclosed. Capable of readily controlling microstructures of olefin polymers in addition to having high catalytic activity, the non-supported heterogeneous catalyst composition can be applied to the preparation of polyolefin polymers at high yield without altering preexisting processes.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.

Abstract: This disclosure relates to an ansa-metallocene compound of a novel structure that can provide various selectivities and activities to polyolefin copolymers, a preparation method thereof, and a method for preparing polyolefins using the ansa-metallocene compound.

Abstract: The present invention relates to a transition metal catalyst composition which can exhibit high reactivity in a polymerization reaction of a polyolefin and can easily control characteristics such as chemical structure, molecular weight distribution, mechanical properties, and the like of a synthesized polyolefin, and a method of preparing a polyolefin using the catalyst composition.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity, heat resistance, and processability. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. In the olefin block copolymer, a first derivative of the number Y of short-chain branches (SCBs) per 1,000 carbon atoms of each polymer chain contained in the block copolymer with respect to the molecular weight X of the polymer chains is a negative or positive number of ?1.5×10?4 or greater; and the first derivative is from ?1.0×10?4 to 1.0×10?4 in the region corresponding to the median of the molecular weight X or above.

Abstract: The present description relates to an olefin block copolymer preferably useful to form nonslip pads due to excellences in elasticity and heat resistance, and a sheet-shaped molded body comprising the olefin block copolymer The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer satisfies a defined relationship when a load of 5 to 10 kg is applied to a sheet-shaped molded body of the block copolymer for 12 hours or longer at a temperature of 60° C. or higher, and then removed.

Abstract: This disclosure relates to an ansa-metallocene compound of a novel structure that can provide various selectivities and activities to polyolefin copolymers, a preparation method thereof, and a method for preparing polyolefins using the ansa-metallocene compound.

Abstract: Disclosed is a metallocene catalyst composition for polyolefin polymerization. The metallocene catalyst composition is in a non-supported, heterogeneous form where an ansa-metallocene is bound to a cocatalyst without a support. Also, a method for preparing the catalyst composition, and a method for preparing polyolefin using the catalyst are disclosed. Capable of readily controlling microstructures of olefin polymers in addition to having high catalytic activity, the non-supported heterogeneous catalyst composition can be applied to the preparation of polyolefin polymers at high yield without altering preexisting processes.

Abstract: The present invention relates to a transition metal catalyst composition which can exhibit high reactivity in a polymerization reaction of a polyolefin and can easily control characteristics such as chemical structure, molecular weight distribution, mechanical properties, and the like of a synthesized polyolefin, and a method of preparing a polyolefin using the catalyst composition.

Abstract: Provided is a polypropylene resin composition having excellent impact resistance, impact strength at low temperature and transparence comprising ethylene-alpha olefin copolymer (c) to a polypropylene resin composition in which the ratio of viscosity is regulated by adjusting molecular weight of propylene-alpha olefin random copolymer (a) and propylene-alpha olefin elastic copolymer (b), thereby regulating impact resistance and flexural modulus of the polypropylene resin composition and improving transparence; therefore, applying as various products including cold-storage containers for freezer and refrigerator, food packaging container, extrusion blow molding material, film, sheet and bottle cap, etc.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm3, and density X (g/cm3) and TMA (Thermal Mechanical Analysis) value Y (° C.) satisfy a defined relationship.

Abstract: The present description relates to an olefin block copolymer preferably useful to form nonslip pads due to excellences in elasticity and heat resistance, and a sheet-shaped molded body comprising the olefin block copolymer The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. The olefin block copolymer satisfies a defined relationship when a load of 5 to 10 kg is applied to a sheet-shaped molded body of the block copolymer for 12 hours or longer at a temperature of 60° C. or higher, and then removed.

Abstract: The present description relates to an olefin block copolymer having excellences in elasticity, heat resistance, and processability. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an ?-olefin repeating unit at different weight fractions. In the olefin block copolymer, a first derivative of the number Y of short-chain branches (SCBs) per 1,000 carbon atoms of each polymer chain contained in the block copolymer with respect to the molecular weight X of the polymer chains is a negative or positive number of ?1.5×10?4 or greater; and the first derivative is from ?1.0×10?4 to 1.0×10?4 in the region corresponding to the median of the molecular weight X or above.

Abstract: The present invention relates to a catalyst system for olefin polymerization and a method for olefin polymerization using the same. More particularly, the present invention relates to a Ziegler-Natta catalyst system for olefin polymerization comprising a transition metal compound as a main catalyst component, an organic metal compound as a cocatalyst component, and a cyclic organosilane compound, trioxasilocane as an external electron donor, and a method for olefin polymerization using the same. According to the present invention, a polyolefin having improved various properties such as polymerization activity, melt-flow ability, isotacticity, molecular weight distribution and apparent density can be produced.