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    • 6. 发明申请
    • Methods For Preparing Aqueous Suspension Of Precious Metal Nanoparticles
    • 制备贵金属纳米粒子水悬浮液的方法
    • US20140213807A1
    • 2014-07-31
    • US14161773
    • 2014-01-23
    • Yuki IchikawaAndrius MarcinkevicusMasayuki ItoWei Qian
    • Yuki IchikawaAndrius MarcinkevicusMasayuki ItoWei Qian
    • C08G65/328B82Y30/00
    • C08G65/328B01J13/0043B82Y30/00
    • The present disclosure is directed to methods of preparing stable suspensions of precious metal nanoparticles and methods for attaching bio-molecules to the nanoparticles. The formation of nanoparticles can be accomplished by either chemical synthesis or pulsed laser ablation in a liquid. The present disclosure reveals the importance of controlling the conductivity of the dispersion medium during pulsed laser ablation in a liquid to control the particle size of the nanoparticles. The present disclosure also reveals the importance of adjusting and maintaining the conductivity in a range of 25 μS/cm or less during storage of the nanoparticles and just prior to performing bioconjugation reactions. The control of conductivity is an important process for maintaining the nanoparticles as a stable non-aggregated colloidal suspension in a dispersion medium.
    • 本公开涉及制备贵金属纳米颗粒的稳定悬浮液的方法和将生物分子附着到纳米颗粒的方法。 纳米颗粒的形成可以通过液体中的化学合成或脉冲激光烧蚀来实现。 本公开揭示了在液体中的脉冲激光烧蚀期间控制分散介质的电导率以控制纳米颗粒的粒度的重要性。 本公开还揭示了在纳米颗粒储存期间和刚好在进行生物共轭反应之前调节和保持电导率在25μS/ cm以下范围内的重要性。 导电性的控制是将纳米颗粒保持在分散介质中作为稳定的非聚集胶体悬浮液的重要方法。
    • 9. 发明授权
    • Amorphous medicinal fine particles produced by pulsed laser ablation in liquid and the production method thereof
    • 液态脉冲激光烧蚀制备的无定形药用细粒及其制备方法
    • US09463243B2
    • 2016-10-11
    • US13765769
    • 2013-02-13
    • Yuki IchikawaAndrius Marcinkevicus
    • Yuki IchikawaAndrius Marcinkevicus
    • A61K9/00A61K41/00A61J3/02A61K9/50A61K9/51
    • A61K41/00A61J3/02A61K9/50A61K9/51Y10T428/2982
    • The present disclosure is directed to an in-liquid laser-based method for fabricating a solution of fine particles of amorphous solid medicinal compounds, a solution of fine particles of amorphous medicinal agents made with the method, and fine particles made with the method. By using a target solidified via a phase transition process to covert an initial crystalline structure into an amorphous solid, technical difficulties with handling a hydraulically-pressed target are overcome. The laser-based ablation process produces amorphous solid medicinal compound fine particles, which improves the bioavailability and solubility of the medicinal compound. The improvement results from a combination of: disordered crystalline structure and enlarged relative surface area by particle size reduction. The laser based method may be carried out with ultrashort pulsed laser systems, or with UV nanosecond lasers. Results obtained with an ultrashort near IR laser and a UV nanosecond laser show formation of amorphous solid curcumin fine particles.
    • 本公开涉及一种用于制造无定形固体药物化合物的细颗粒溶液的液体内基于激光的方法,用该方法制备的非晶医药的微粒溶液和用该方法制备的微粒。 通过使用通过相变过程固化的靶将初始晶体结构转变为无定形固体,克服了处理液压压制靶的技术困难。 基于激光的消融过程产生无定形固体药物复合细颗粒,其改善药物化合物的生物利用度和溶解度。 通过以下组合的改进结果:无序的结晶结构和通过粒径减小扩大的相对表面积。 基于激光的方法可以用超短脉冲激光系统或UV纳秒激光器进行。 用超短距离近红外激光和UV纳秒激光显示的结果显示无定形固体姜黄素细颗粒的形成。