Abstract: The present invention relates to a method for preparing graphene which comprises subjecting expanded graphite to high speed homogenization to prepare a feed solution and then subjecting the same to high pressure homogenization, thereby increasing the degree of dispersion of expanded graphite in the feed solution and so improving the efficiency of high pressure homogenization. Therefore, the present method has features that the efficiency of graphene preparation is excellent and the size of graphene to be prepared is uniform, compared with a conventional process.

Abstract: The present invention relates to a method for preparing graphene using a novel block copolymer. The present invention has features that, by using the block copolymer to mediate graphene that is hydrophobic and a solvent of a feed solution that is hydrophilic, the exfoliation efficiency of graphene as well as the dispersion stability thereof can be increased during high-pressure homogenization.

Abstract: The present invention relates to a partially oxidized graphene and a method for preparing the same. Since the partially oxidized graphene is prepared by subjecting the partially oxidized graphite to a high pressure homogenization, the exfoliation efficiency is excellent, the inherent characteristics of graphene are maintained even without using a reduction step after exfoliation, and the dispersibility thereof in organic solvents is excellent, and thus the invention can be applied to various fields.

Abstract: Disclosed herein are a preparation method of graphene, capable of easily preparing a graphene flake having a smaller thickness and a large area, and a dispersed composition of graphene obtained using the same. The preparation method of graphene includes applying a physical force to dispersion of a carbon-based material including graphite or a derivative thereof, and a dispersant, wherein the dispersant includes a mixture of plural kinds of polyaromatic hydrocarbon oxides, containing the polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in a content of 60% by weight or more, and the graphite or the derivative thereof is formed into a graphene flake having a thickness in nanoscale under application of a physical force.

Abstract: The present invention relates to a novel polyene compound similar to nystatin, a method for preparing the same, and an antifungal drug comprising the novel polyene compound as an active ingredient. Compared to nystatin comprising one sugar, NNP, which is the polyene compound similar to nystatin, displays 300 times higher solubility and ten times lower cytotoxicity while maintaining antifungal activity, and thus can be useful in developing a novel polyene antifungal agent having improved solubility and less toxicity in terms of pharmacokinetics.

Abstract: The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.

Abstract: The present invention relates to a conducting material composition capable of forming an electrode in which at least two kinds of carbon based materials are contained in a uniformly dispersed state to enable a battery such as a lithium rechargeable battery having more improved electrical and lifetime characteristics to be provided, and a slurry composition for forming an electrode of a lithium rechargeable battery and a lithium rechargeable battery using the same. The conducting material composition contains: at least two kinds of conductive carbon-based materials selected from the group consisting of carbon nano tube, graphene, and carbon black; and a dispersant containing a plurality kinds of poly aromatic hydrocarbon oxides, wherein the dispersant contains poly aromatic hydrocarbon oxides having a molecular weight of 300 to 1000 at a content of 60 wt. % or more.

Abstract: Disclosed is a novel polyene-specific glycosyltransferase derived from Pseudonocardia autotrophica. The glycosyltransferase includes an amino acid sequence of SEQ ID NO: 1 and a gene encoding the glycosyltransferase. The glycosyltransferase is produced by a method which includes the steps of: culturing transgenic recombinant microorganisms; and isolating glycosyltransferase from the cultured recombinant microorganisms.

Abstract: An epoxy resin composition according to an embodiment of the present invention comprises an epoxy resin, 0.05-190 parts by weight, based on 10 parts by weight of the epoxy resin, of a polyester-based curing agent, wherein the epoxy resin comprises a triazine derivative epoxy compound and a siloxane compound containing an alicyclic epoxy group and a siloxane group.

Abstract: An epoxy resin composition provided according to one embodiment of the present invention includes: a triazine derivative epoxy compound; a siloxane compound including a cycloaliphatic epoxy group and a siloxane group; and a curing agent, where the epoxy resin composition includes 10 to 70 parts by weight of the siloxane group with respect to 100 parts by weight of the siloxane compound, thereby providing a composition excellent in heat resistance, light resistance, and excess moisture tolerance, with good shear adhesion to silicone, and capable of semi-solidification.

Abstract: An epoxy resin composition according to an embodiment of the present invention comprises an epoxy resin, 0.05-190 parts by weight, based on 10 parts by weight of the epoxy resin, of a polyester-based curing agent, wherein the epoxy resin comprises a triazine derivative epoxy compound and a siloxane compound containing an alicyclic epoxy group and a siloxane group.

Abstract: The present invention relates to a novel polyene compound similar to nystatin, a method for preparing the same, and an antifungal drug comprising the novel polyene compound as an active ingredient. Compared to nystatin comprising one sugar, NNP, which is the polyene compound similar to nystatin, displays 300 times higher solubility and ten times lower cytotoxicity while maintaining antifungal activity, and thus can be useful in developing a novel polyene antifungal agent having improved solubility and less toxicity in terms of pharmacokinetics.

Abstract: The invention provides an electronic device configured to prevent or reduce electrostatic discharge from causing a pixel to malfunction. An electronic device manufactured according to the principles of the invention may include multiple conductive layers that cross but do not contact each other, wherein at least one of the conductive layers includes a width change part having a width that changes in a length direction of the at least one of the conductive layers, and a tab connected to at least one of the conductive layers at a region thereof that does not cross a neighboring conductive layer. Alternatively, the width change part may have a width that continuously varies along a length of the at least one conductive layer and may also have obtuse corner edges. The invention also provides a flat organic electroluminescent display (OELD) or LCD display device that includes such an electronic device.

Abstract: The invention provides an electronic device configured to prevent or reduce electrostatic discharge from causing a pixel to malfunction. An electronic device manufactured according to the principles of the invention may include multiple conductive layers that cross but do not contact each other, wherein at least one of the conductive layers includes a width change part having a width that changes in a length direction of the at least one of the conductive layers, and a tab connected to at least one of the conductive layers at a region thereof that does not cross a neighboring conductive layer. Alternatively, the width change part may have a width that continuously varies along a length of the at least one conductive layer and may also have obtuse corner edges. The invention also provides a flat organic electroluminescent display (OELD) or LCD display device that includes such an electronic device.

Abstract: An impedance calibration circuit and a semiconductor device including the same are provided. An embodiment of the invention provides an impedance calibration circuit with a variable reference voltage generation unit. The impedance calibration circuit maximizes the number of semiconductor devices that can be tested in test equipment at one time and permits the operation of an impedance matching unit (e.g., an on-die-termination (ODT) circuit and/or an off-chip-driver (OCD)) to be tested for a variety of reference resistor values.

Abstract: An impedance calibration circuit and a semiconductor device including the same are provided. An embodiment of the invention provides an impedance calibration circuit with a variable reference voltage generation unit. The impedance calibration circuit maximizes the number of semiconductor devices that can be tested in test equipment at one time and permits the operation of an impedance matching unit (e.g., an on-die-termination (ODT) circuit and/or an off-chip-driver (OCD)) to be tested for a variety of reference resistor values.

Abstract: The invention provides an electronic device configured to prevent or reduce electrostatic discharge from causing a pixel to malfunction. An electronic device manufactured according to the principles of the invention may include multiple conductive layers that cross but do not contact each other, wherein at least one of the conductive layers includes a width change part having a width that changes in a length direction of the at least one of the conductive layers, and a tab connected to at least one of the conductive layers at a region thereof that does not cross a neighboring conductive layer. Alternatively, the width change part may have a width that continuously varies along a length of the at least one conductive layer and may also have obtuse corner edges. The invention also provides a flat organic electroluminescent display (OELD) or LCD display device that includes such an electronic device.

Abstract: Provided are a duty cycle correction circuit and method for duty cycle correction in a delay locked loop using an inversion locking scheme.

Abstract: Provided are a duty cycle correction circuit and method for duty cycle correction in a delay locked loop using an inversion locking scheme.

Abstract: The invention provides an electronic device configured to prevent or reduce electrostatic discharge from causing a pixel to malfunction. An electronic device manufactured according to the principles of the invention may include multiple conductive layers that cross but do not contact each other, wherein at least one of the conductive layers includes a width change part having a width that changes in a length direction of the at least one of the conductive layers, and a tab connected to at least one of the conductive layers at a region thereof that does not cross a neighboring conductive layer. Alternatively, the width change part may have a width that continuously varies along a length of the at least one conductive layer and may also have obtuse corner edges. The invention also provides a flat organic electroluminescent display (OELD) or LCD display device that includes such an electronic device.