摘要:
A biocidal article, includes a surface including a plurality of polymers covalently attached to the surface. The polymers include biocidal cationic groups. The polymers have a molecular weight distribution or polydispersity less than 3. A grafting density of the polymers on the surface is controlled, average degree of polymerization of the polymers is controlled and repeat units of the polymers are chosen to provide a predetermined charge density arising from the cationic groups. A method of analyzing biocidal activity of biocidal surface agents includes the steps: attaching a plurality of chemical entities to one or more surfaces so that at least one physiochemical property is varied, each of the chemical entities comprising at least one biocidally active component; and exposing the chemical entities to at least one biological agent to determine the effect of the at least one physiochemical property upon biocidal activity. The biocidal activity can, for example, be antibacterial activity or sporicidal activity. The at least one physiochemical property can, for example, be varied in a preferably systematic manner.
摘要:
The present invention relates to biocidal articles. In an embodiment the biocidal article comprises a plurality of polymers having biocidally active groups. The polymers are attached to a surface and may have a polydispersity less than 3. The biocidally active groups may comprise at least one of a quaternary ammonium salt, a quaternary phosphonium salt or a chloroamine. The attached polymers may be any microstructure, topology or composition, such as, a homopolymer, block copolymer, multiblock copolymer, a random copolymer, graft polymer, a branched or a hyperbranched polymer, and a gradient copolymer. The present invention also comprises a process for the preparation of a biocidal article. Embodiments of the process comprise polymerizing radically polymerizable monomers from an initiator attached to a surface, wherein at least a portion of the monomers comprise a group capable of being converted to a biocidally active group, and converting the group to the biocidally active group.
摘要:
The present invention provides amphiphilic diacetylene compounds, and compositions and self-assembled nanotubes containing the same. Also provided are methods of producing the compounds, compositions, and nanotubes of the invention, and methods of destroying or inhibiting the growth or proliferation of microorganisms using the nanotubes of the present invention.
摘要:
The present invention relates to biocidal articles. In an embodiment the biocidal article comprises a plurality of polymers having biocidally active groups. The polymers are attached to a surface and may have a polydispersity less than 3. The biocidally active groups may comprise at least one of a quaternary ammonium salt, a quaternary phosphonium salt or a chloroamine. The attached polymers may be any microstructure, topology or composition, such as, a homopolymer, block copolymer, multiblock copolymer, a random copolymer, graft polymer, a branched or a hyperbranched polymer, and a gradient copolymer. The present invention also comprises a process for the preparation of a biocidal article. Embodiments of the process comprise polymerizing radically polymerizable monomers from an initiator attached to a surface, wherein at least a portion of the monomers comprise a group capable of being converted to a biocidally active group, and converting the group to the biocidally active group.
摘要:
An LCD device has scratch-resistant property without using a protection sheet and can provide enhanced brightness. The LCD device includes a light path regulating member. The member includes a first prism sheet having first prisms of which apex has a round shape. The first prism sheet concentrates light supplied from a lamp to output the concentrated light. An anti-glare polarizing plate uniformly polarizes polarized planes of the concentrated light and provides the polarized light to the lower substrate. The anti-glare polarizing plate is arranged below the lower substrate of an LCD panel, and an uppermost prism sheet of optical sheets is non-matte-treated and has round-treated apexes. In spite of the absence of the protection sheet, the scratch-resistant property of the uppermost prism sheet and the brightness of the LCD panel may be enhanced.
摘要:
A reactor for thin film deposition and a thin film deposition method using the reactor are provided. The reactor includes: a reactor block which receives a wafer transferred through a wafer transfer slit; a wafer block which is installed in the reactor block to receive the wafer thereon; a top plate disposed to cover the reactor block; a shower head which is mounted on the bottom of the top plate and diffuses gas toward the wafer; and an exhaust unit which exhausts the gas from the reactor block. A first supply pipeline which supplies a first reactant gas and/or an inert gas to the wafer; a second supply pipeline which supplies a second reactant gas and/or an inert gas to the wafer; and a plasma generator which generates plasma between the wafer block and shower head are included. The shower head includes: a first supply path connected to the first supply pipeline; a plurality of first diffuse holes formed in the bottom of the shower head at a constant interval; a first main path formed parallel to the plane of the shower head and connecting the plurality of first diffuse holes and the first supply path; a second supply path connected to the second supply pipeline; a plurality of second diffuse holes formed in the bottom of the shower head at a constant interval as the plurality of the first diffuse holes; and a second main path formed parallel to the plane of the shower head at a different height from the second main path and connecting the plurality of second diffuse holes and the second supply path.
摘要:
The present invention relates to novel rumen bacterial mutants resulted from the disruption of a lactate dehydrogenase gene (ldhA) and a pyruvate formate-lyase gene (pfl) (which are involved in the production of lactic acid, formic acid and acetic acid) from rumen bacteria; a novel bacterial mutant (Mannheimia sp. LPK7) having disruptions of a lactate dehydrogenase gene (ldhA), a pyruvate formate-lyase gene (pfl), a phosphotransacetylase gene (pta), and a acetate kinase gene (ackA); a novel bacterial mutant (Mannheimia sp. LPK4) having disruptions of a lactate dehydrogenase gene (ldhA), a pyruvate formate-lyase gene (pfl) and a phosphoenolpyruvate carboxylase gene (ppc) involved in the immobilization of CO2 in a metabolic pathway of producing succinic acid; and a method for producing succinic acid, which is characterized by the culture of the above mutants in anaerobic conditions. The inventive bacterial mutants have the property of producing succinic acid at high concentration while producing little or no organic acids, as compared to the prior wild-type strains of producing various organic acids. Thus, the inventive bacterial mutants are useful as strains for the industrial production of succinic acid.
摘要:
Provided is a shower head used in a reactor for thin film deposition, and a method of fabricating the shower head. The shower head for injecting gases onto a wafer mounted on a wafer block includes: a first supply path supplying a first reaction gas and a second supply path supplying a second reaction gas; a first main path connected to the first supply path and in the plane of the shower head, a plurality of first sub-paths diverging from the first main path in the plane of the shower head, a plurality of first diffuse holes formed regularly spaced on a bottom surface of the shower head, and a plurality of first diffuse paths connecting the plurality of first sub-paths to the plurality of first diffuse holes; a second main path connected to the second supply path in the plane of the shower head and not contacting the first main path, a plurality of second sub-paths diverging from the second main path in the plane of the shower head, a plurality of second diffuse holes formed regularly spaced on a bottom surface of the shower head, and a plurality of second diffuse paths connecting the plurality of second sub-paths and the plurality of second diffuse holes; and a sealing unit sealing open ends of the first and second main paths and open ends of the first and second sub-paths formed in the shower head.
摘要:
A light generating unit includes a plurality of light sources generating lights with different wavelengths. Among the light sources, at least one is disposed on a horizontal surface which differs in height from horizontal surfaces on which the other light sources are disposed. A display device includes the above light generating unit and a display panel for displaying an image by using the lights generated from the light generating unit. A method of improving color uniformity in the display device includes arranging the light sources as in the light generating unit.
摘要:
Disclosed is a diamond tool having a metal plate inserted therein. Between abrasive layers containing diamond particles is inserted a ferrous or non-ferrous metal plate having a wear resistance lower than that of the abrasive layers such that a concave groove is spontaneously formed during a cutting process, thereby reducing the contact load with a workpiece to thereby avoid vibration (wobbling) of a shank, and providing a discharge path for smoothly removing cutting chips and the cooling water. In addition, the content of abrasives and the wear resistance of bonding material are uniformly constituted so that the shrinkage rate does not need to be considered during sintering and the manufacturing process can be simplified, thereby reducing the manufacturing cost and improving the productivity therefor. Furthermore, the area of the metal plate can be controlled, thereby enabling an easy design conforming to the working conditions with a workpiece.