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    • 32. 发明授权
    • Method of making and using derivatized paramagnetic polymer beads
    • 制造和使用衍生的顺磁性聚合物珠的方法
    • US5858534A
    • 1999-01-12
    • US749353
    • 1996-09-04
    • Irving Sucholeiki
    • Irving Sucholeiki
    • G01N33/543B32B5/16
    • G01N33/5434B01J2219/005G01N2446/86G01N2446/90Y10T428/2998
    • A solid phase magnetic support having a hydrophilic surface, a method of making the support, and a method of using the support for peptide synthesis are provided. The solid phase magnetic support is synthesized from a starting material which is a magnetic polystyrene polymer bead which has a plurality of polystyrene coated metal oxide particles randomly distributed in a polystyrene matrix having chloromethyl groups. Hydrophilic long chain hydrocarbon spacer arms, such as polyalkylene diamine molecules are coupled with sonication to the chloromethyl groups. Each spacer arm is provided with a terminal amine for linking to a first amino acid. Preferably, the terminal amine on the spacer arm is provided by a low molecular weight linker molecule which can be acid cleaved from the spacer arm. However, the spacer arm may be derivatized and linked to a first amino acid which cannot be acid cleaved from the spacer arm. The inventive support can be used for automated peptide synthesis or as a support for a bound ligand in bioassays. The support is held in place magnetically while the surrounding solution is siphoned off allowing simultaneous separation of the support bound component from the reactants in solution and washing.
    • 提供具有亲水表面的固相磁性载体,制备载体的方法和使用该载体用于肽合成的方法。 固相磁性载体是由具有随机分布在具有氯甲基的聚苯乙烯基质中的多个聚苯乙烯涂覆的金属氧化物颗粒的磁性聚苯乙烯聚合物珠粒的起始材料合成的。 亲水性长链烃隔离臂如聚亚烷基二胺分子与超声处理与氯甲基偶联。 每个间隔臂设置有用于连接到第一氨基酸的末端胺。 优选地,间隔臂上的末端胺由可以从间隔臂酸切割的低分子量连接分子提供。 然而,间隔臂可以被衍生化并连接到不能从间隔臂被酸切割的第一个氨基酸。 本发明的载体可用于自动肽合成或作为生物测定中结合配体的载体。 将支撑体保持在磁性位置,同时虹吸掉周围的溶液,从而在溶液和洗涤中同时将载体结合的组分与反应物分离。
    • 33. 发明授权
    • Composite magnetic beads
    • 复合磁珠
    • US5834121A
    • 1998-11-10
    • US585905
    • 1996-01-16
    • Irving SucholeikiGraham MargettsMark Roberts
    • Irving SucholeikiGraham MargettsMark Roberts
    • B03C1/01C02F1/48C02F1/68G01N33/543H01F1/00H01F1/37B32B5/16B05D7/00
    • B82Y25/00B03C1/01C02F1/681G01N33/5434H01F1/37C02F1/48G01N2446/20G01N2446/40G01N2446/86Y10S428/90Y10T428/2998
    • This invention provides a novel composite magnetic bead and a method for making the composite magnetic bead. The composite magnetic bead is comprised of a matrix formed from vinyl monomers throughout which is distributed primary beads, each primary bead of which is a magnetizable metal oxide encapsulated in a rigid polymeric coating. The matrix structure allows the composite magnetic bead to swell in organic solvents without loss of the intermeshed primary beads. Further, the matrix can be functionalized to allow the covalent bonding of sites useful for organic syntheses. The composite magnetic beads are made utilizing a core-shell polymerization techinque under conditions which preserve the oxidation state of the magnetizable metal oxide in the primary particles. In one embodiment, primary beads, each having a hydrophobic exterior surface, are dispersed in an inert solvent with a vinyl monomer and a crosslinking agent for that monomer to form a dispersed phase. The dispersed phase is mixed into an aqueous solvent-dispersing agent phase and stirred until the desired droplet size is achieved, then polymerization is initiated. After removal of the solvent and unreacted components, the composite magnetic beads are dried and sieved.
    • 本发明提供一种新型复合磁珠及其制造方法。 复合磁珠由由乙烯基单体形成的基体组成,其中分布有初级珠,每个主珠是包封在刚性聚合物涂层中的可磁化金属氧化物。 基体结构允许复合磁珠在有机溶剂中溶胀而不损失相互啮合的初级珠粒。 此外,基质可以官能化以允许有机合成有用的位点的共价键。 在保持一次颗粒中的可磁化金属氧化物的氧化态的条件下,使用核 - 壳聚合技术制备复合磁珠。 在一个实施方案中,每个具有疏水性外表面的初级珠粒分散在具有乙烯基单体和用于该单体的交联剂的惰性溶剂中以形成分散相。 将分散相混合到水性溶剂分散剂相中并搅拌直到达到所需的液滴尺寸,然后开始聚合。 除去溶剂和未反应的组分后,将复合磁珠干燥并过筛。