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    • 6. 发明申请
    • MELT EMULSIFICATION
    • WO2011116154A3
    • 2012-06-07
    • PCT/US2011028754
    • 2011-03-17
    • HARVARD COLLEGEBASF SESHUM HO CHEUNGSUN BINGJIEWEITZ DAVID AHOLTZE CHRISTIAN
    • SHUM HO CHEUNGSUN BINGJIEWEITZ DAVID AHOLTZE CHRISTIAN
    • B01J13/00A01N25/28A61K9/50B01J13/04C09B67/00C11D3/50C11D17/00
    • B01J13/0086B01F3/0807B01F13/0062B01F2005/0034B01J13/04C09B67/0009C09B67/0097G01N2015/1413
    • The present invention generally relates to colloidal systems, which may include colloidal particles and/or other types of particles. One aspect of the invention is generally directed to a system comprising fluidic droplets that can be at least partially solidified, e.g., to form colloidal particles. In some embodiments, particles comprising an at least partially solid outer phase encapsulating an inner phase are formed. The inner phase may be any phase, e.g., a solid, a liquid, or a gas. In some cases, solidifying at least a portion of the outer phase of the droplets to form particles may increase the stability of the particles and/or the colloidal system containing the particles. In one set of embodiments, melting or liquefying the outer phase of the particles (for example, by heating the particle to a temperature above a threshold temperature) can allow release of an agent contained within the inner phase, and/or allow the inner phase to coalesce with a phase external to the particles. The melting temperature of the outer phase can be controlled in some embodiments such that the outer phase will melt above a predetermined temperature. In some embodiments, the particles may be formed to be essentially free of an auxiliary stabilizing agent. In some embodiments, an agent may be encapsulated within a particle with relatively high efficiency. Other aspects of the invention are generally directed to methods of making and using such colloidal systems, e.g., containing such particles, kits involving such colloidal systems, or the like.
    • 本发明一般涉及胶体体系,其可以包括胶体颗粒和/或其它类型的颗粒。 本发明的一个方面通常涉及包含流体液滴的系统,其可以至少部分地固化,例如形成胶体颗粒。 在一些实施方案中,形成包含至少部分固体外层的包封内相的颗粒。 内相可以是任何相,例如固体,液体或气体。 在一些情况下,固化液滴的外相的至少一部分以形成颗粒可以增加包含颗粒的颗粒和/或胶体体系的稳定性。 在一组实施方案中,熔化或液化颗粒的外相(例如,通过将颗粒加热到高于阈值温度的温度)可以允许包含在内相内的试剂的释放和/或允许内相 以颗粒外部的相合并。 在一些实施方案中,可以控制外相的熔融温度,使得外相将在预定温度以上熔化。 在一些实施方案中,颗粒可以形成为基本上不含辅助稳定剂。 在一些实施方案中,试剂可以以相对高的效率封装在颗粒内。 本发明的其它方面通常涉及制备和使用这种胶体体系的方法,例如含有这种颗粒,涉及这种胶体系的试剂盒等。
    • 10. 发明申请
    • VALVES AND OTHER FLOW CONTROL IN FLUIDIC SYSTEMS INCLUDING MICROFLUIDIC SYSTEMS
    • 流体系统中的阀门和其他流量控制,包括微流体系统
    • WO2009139898A2
    • 2009-11-19
    • PCT/US2009/003024
    • 2009-05-15
    • PRESIDENT AND FELLOWS OF HARVARD COLLEGEABATE, Adam, R.WEITZ, David, A.
    • ABATE, Adam, R.WEITZ, David, A.
    • B01J14/00
    • B01L3/502738B01L3/0268B01L3/502746B01L3/502784B01L2200/0605B01L2200/0636B01L2200/146B01L2300/0816B01L2300/0864B01L2300/0867B01L2400/0487B01L2400/0655B01L2400/082F16K99/0017F16K99/0026F16K99/0055Y10T436/2575
    • Articles and methods for controlling flow in fluidic systems, especially in microfluidic systems, are provided. In one aspect, a microfluidic system described herein includes a configuration such that the actuation of a single valve can allow the switching of fluids from a first fluid path (e.g., a first channel section) to a second fluid path (e.g., a second channel section). This may be achieved, for example, by incorporating a valve with a first channel section, which may have a lower hydrodynamic resistance than a second channel section prior to actuation of the valve. Actuation of the valve can cause only the hydrodynamic resistance of the first channel section to increase, thereby redirecting fluid flow into the second channel section (which now has a relatively lower hydrodynamic resistance). In some embodiments, the valve comprises a control channel for introducing a positive or reduced pressure, and is adapted to modulate fluid flow in an adjacent channel section by constricting or expanding the channel section. For example, the valve and/or the channel section may be formed in a flexible material and actuation of the valve may be achieved by applying a positive or reduced pressure to the valve to cause deformation of both the valve and the channel section. Another aspect of the invention includes articles and methods associated with manipulation of multiphase materials (e.g., dispersions). For instance, one or more valves may be combined with a flow focusing system so as to form droplets of different volumes and/or frequencies without the need to vary flow rates of the fluids when they are introduced into the fluidic system.
    • 提供了用于控制流体系统流动的文章和方法,特别是在微流体系统中。 在一个方面,本文描述的微流体系统包括使得单个阀的致动可以允许流体从第一流体路径(例如,第一通道部分)切换到第二流体路径(例如,第二通道 部分)。 这可以通过例如通过结合具有第一通道部分的阀来实现,该阀在致动阀之前可具有比第二通道部分更低的流体动力阻力。 阀的致动可以仅使第一通道部分的流体动力阻力增加,从而将流体流转向第二通道部分(其现在具有相对较低的流体动力阻力)。 在一些实施例中,阀包括用于引入正压或减压的控制通道,并且适于通过收缩或扩大通道部分来调制相邻通道部分中的流体流动。 例如,阀和/或通道部分可以形成为柔性材料,并且可以通过向阀施加正压或减压以使阀和通道部分变形来实现阀的致动。 本发明的另一方面包括与多相材料(例如分散体)的操作有关的制品和方法。 例如,一个或多个阀可以与流动聚焦系统组合,以便形成不同体积和/或频率的液滴,而不需要在将流体引入流体系统时改变流体流速。