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    • 75. 发明授权
    • Systems and methods for amplification and phage display
    • 用于扩增和噬菌体展示的系统和方法
    • US09499813B2
    • 2016-11-22
    • US13702603
    • 2011-06-10
    • Ratmir DerdaSindy K. Y. TangGeorge M. Whitesides
    • Ratmir DerdaSindy K. Y. TangGeorge M. Whitesides
    • C12N15/10C40B40/02C40B50/06
    • C12N15/1037C40B40/02C40B50/06
    • Embodiments of various aspects described herein are directed to amplification of biological entities, for example, for phage display. In one aspect, members of a library of biological entities are encapsulated in separate compartments (e.g., in separate microfluidic droplets) and amplified. For example, by putting members of a phage display library into microfluidic droplets such that no droplet contains more than one member of the library, the library can be amplified without any substantial changes in population distributions, or other artifacts created due to differences in growth rates or amplification between different members of the library. In some cases, the volume of the compartments can be used to control the copy number of a biological entity during amplification. This can be advantageous, for example, in preserving diversity within a library by preventing rapidly amplifying biological entities from outcompeting slowly amplifying biological entities.
    • 本文描述的各个方面的实施方案涉及生物实体的扩增,例如用于噬菌体展示。 在一个方面,生物实体文库的成员被包封在分离的隔室中(例如,在单独的微流体液滴中)并被扩增。 例如,通过将噬菌体展示文库的成员放入微流体液滴中,使得没有液滴包含多于一个文库的成员,可以扩增文库,而不会由于生长速率差异而产生的群体分布或其他工件的任何实质性变化 或在图书馆的不同成员之间进行放大。 在一些情况下,隔室的体积可以用于在放大期间控制生物实体的拷贝数。 这可能是有利的,例如,通过防止快速扩增生物实体免于超过慢性扩增的生物实体来保存文库内的多样性。
    • 77. 发明授权
    • Patterning of ionic polymers
    • 离子聚合物图案化
    • US09023458B2
    • 2015-05-05
    • US12311811
    • 2007-10-18
    • Michal LahavAdam WinklemanMax NarovlyanskyRaquel Perez-CastillejosEmily A. WeissLeonard N. J. RodriguezGeorge M. Whitesides
    • Michal LahavAdam WinklemanMax NarovlyanskyRaquel Perez-CastillejosEmily A. WeissLeonard N. J. RodriguezGeorge M. Whitesides
    • B32B3/00B05D3/06B82Y10/00B82Y40/00G03F7/00
    • G03F7/0002B82Y10/00B82Y40/00Y10T428/24479
    • In one aspect, methods of patterning of thin films of an ionotropic polymer (e.g., poly(acrylic acid)) are provided. These processes can create micron or sub-micron-scale patterns of ionotropic polymers such as cation crosslinked poly(acrylic acid) (CCL-PAA). In one embodiment, patterning may be performed within microfluidic channels by flowing a solution of crosslinking agent (e.g., metal cations such as Ag+, Ca2+, Pd2+, Al3+, La3+, and Ti4+) that can crosslink a portion of an ionotropic polymer in contact with the solution. In another embodiment, methods of patterning ionotropic polymers involve photolithography. Upon patterning a positive photoresist (e.g., diazonaphthoquinone-novolac resin) on a film of CCL-PAA, the exposed regions of CCL-PAA can be etched by an aqueous solution. Advantageously, the patterned, crosslinked polymer may also serve as both a reactant and a matrix for subsequent chemistry. For example, in some embodiments, the initial crosslinking cation can be exchanged for a second cation that could not be patterned photolithographically. Patterned films of CCL-PAA can also be used to host and template the reduction of metallic cations to metallic nanoparticles, and to fabricate porous, low-k dielectric substrates.
    • 一方面,提供了离子型聚合物(例如聚(丙烯酸))的薄膜图案化方法。 这些方法可以产生离子型聚合物如阳离子交联的聚(丙烯酸)(CCL-PAA)的微米级或亚微米级的图案。 在一个实施方案中,可以在微流体通道内通过使交联剂(例如金属阳离子如Ag +,Ca 2+,Pd 2+,Al 3+,La 3+和Ti 4+)的溶液流过微流体通道,所述溶液可以将部分离子型聚合物与 解决方案。 在另一个实施方案中,构图离子型聚合物的方法涉及光刻。 在CCL-PAA膜上形成正性光致抗蚀剂(例如重氮萘酚 - 酚醛清漆树脂)之后,CCL-PAA的暴露区域可以通过水溶液进行蚀刻。 有利地,图案化的交联聚合物也可以用作反应物和用于后续化学的基质。 例如,在一些实施方案中,可以将初始交联阳离子交换为不能光刻图案化的第二阳离子。 CCL-PAA的图案化膜也可用于将金属阳离子还原为金属纳米颗粒,并制备多孔,低k电介质基底。