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    • 1. 发明申请
    • METHOD FOR EVALUATING THE SOLUBILITY OF A CRYSTALLINE SUBSTANCE IN A POLYMER
    • 评估聚合物中晶体物质的溶解性的方法
    • WO2009135799A2
    • 2009-11-12
    • PCT/EP2009/055233
    • 2009-04-29
    • ABBOTT GMBH & CO. KGZHANG, Geoff, G., Z.YU, LianTAO, JingSUN, YeMAEGERLEIN, Markus
    • ZHANG, Geoff, G., Z.YU, LianTAO, JingSUN, YeMAEGERLEIN, Markus
    • G01N33/15
    • G01N33/15G01N25/4866
    • A viable strategy to enhance the bioavailability of poorly soluble drugs is to use amorphous solids in place of the more commonly used crystalline solids in pharmaceutical formulations. However, amorphous solids are physically meta-stable and tend to revert back to their crystalline counterpart. An effective approach to stabilizing an amorphous drug against crystallization is to disperse it in a polymer matrix. The drug's solubility in the chosen polymer defines the upper limit of drug loading without any risk of crystallization. Measuring the solubility of a drug in a polymer has been a scientific and technological challenge because the high viscosity of polymers makes achieving solubility equilibrium difficult and because pharmaceutically important drug/polymer dispersions are glasses, which undergo structural relaxation over time. The invention provides a method based on Differential Scanning Calorimetry (DSC) for measuring the solubility of crystalline drugs in polymeric matrices. The method relies on the detection of the dissolution endpoint of a drug/polymer mixture prepared by cryomilling.
    • 提高难溶性药物的生物利用度的可行策略是使用无定形固体代替药物制剂中更常用的结晶固体。 然而,无定形固体物理上是元稳定的,并且倾向于回复到它们的结晶对应物。 稳定无定形药物抗结晶的有效方法是将其分散在聚合物基质中。 药物在所选聚合物中的溶解度限定了药物负载的上限,而没有结晶的风险。 测量药物在聚合物中的溶解度已经是科学和技术挑战,因为聚合物的高粘度使得难以实现溶解度平衡,并且因为药物重要的药物/聚合物分散体是随时间经历结构松弛的玻璃。 本发明提供了一种基于差示扫描量热法(DSC)测量结晶药物在聚合物基质中的溶解度的方法。 该方法依赖于通过冷冻法制备的药物/聚合物混合物的溶解终点的检测。
    • 2. 发明申请
    • METHOD FOR EVALUATING THE SOLUBILITY OF A CRYSTALLINE SUBSTANCE IN A POLYMER
    • 评估聚合物中晶体物质的溶解性的方法
    • WO2011089202A1
    • 2011-07-28
    • PCT/EP2011/050792
    • 2011-01-21
    • ABBOTT GMBH & CO. KGZHANG, Geoff G. Z.YU, LianTAO, JingSUN, YeMAEGERLEIN, Markus
    • ZHANG, Geoff G. Z.YU, LianTAO, JingSUN, YeMAEGERLEIN, Markus
    • G01N25/48G01N33/15
    • G01N33/15G01N25/4866G01N2013/006
    • A method for evaluating the solubility of a crystalline substance in a polymer comprises a) providing at least one sample of an intimate crystalline substance/polymer mixture at a predetermined crystalline substance concentration; b) annealing the sample at a constant temperature T a for a period of time; c) heating the annealed sample while recording the heat flux over time by DSC; d) identifying a DSC dissolution endotherm in the recorded heat flux, if any; e) considering the crystalline substance concentration as a concentration above the crystalline substance solubility in the polymer at temperature T a when there is a DSC dissolution endotherm identified, and considering the crystalline substance concentration as a concentration less than or equal to the crystalline substance solubility in the polymer at temperature T a when there is no DSC dissolution endotherm identified. Thus, the method yields the upper and lower bounds for the equilibrium solubility at a given temperature or the upper and lower bounds for the equilibrium solubility temperature at a given crystalline substance concentration. The method improves accuracy of measurement near the glass transition temperature.
    • 用于评价结晶物质在聚合物中的溶解度的方法包括a)以预定的结晶物质浓度提供至少一种紧密结晶物质/聚合物混合物的至少一个样品; b)在恒温Ta下将样品退火一段时间; c)加热退火样品,同时通过DSC随时间记录热通量; d)识别记录的热通量中的DSC溶解吸热(如果有的话); e)当确定DSC溶解吸热时,考虑结晶物质浓度高于结晶物质在聚合物中的溶解度的浓度,考虑到结晶物质浓度小于或等于结晶物质溶解度的浓度 聚合物在温度Ta时没有DSC溶解吸热确定。 因此,该方法产生在给定温度下的平衡溶解度的上限和下限,或者给定在给定结晶物质浓度下的平衡溶解度温度的上限和下限。 该方法提高玻璃化转变温度附近的测量精度。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR OPTIMIZING OPTICAL DISC WRITING STRATEGY
    • 用于优化光盘写入策略的方法和设备
    • WO2007069158A2
    • 2007-06-21
    • PCT/IB2006/054674
    • 2006-12-08
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.ZHONG, JianyiTAO, JingWEI, Gongming
    • ZHONG, JianyiTAO, JingWEI, Gongming
    • G11B7/125
    • G11B7/006G11B7/00736G11B7/1267
    • The present invention provides a method and apparatus for optimizing optical disc writing strategy. The method for optimizing optical disc writing strategy comprises the steps of obtaining the information concerning whether said area to be written has experienced any writing before; searching for an area that has the corresponding information in the writing optimization area on said optical disc; and performing writing test on said area that has the corresponding information to optimize and determine an optical disc writing strategy for writing said optical disc. The method and apparatus could not only reduce the difference between the optical disc writing strategy and the real optical disc writing condition as much as possible, but also lower the requirement on the optical disc writing equipment and the cost, and could be easily realized.
    • 本发明提供了一种用于优化光盘写入策略的方法和装置。 用于优化光盘写入策略的方法包括以下步骤:获得关于所述待写入区域是否经历过任何写入的信息; 在所述光盘上的写入优化区域中搜索具有相应信息的区域; 以及对具有相应信息的所述区域执行写入测试以优化和确定用于写入所述光盘的光盘写入策略。 该方法和装置不仅能够尽可能地减少光盘写入策略和实际光盘写入条件之间的差异,而且也降低了对光盘写入设备的要求和成本,并且可以容易地实现。 / p>
    • 8. 发明申请
    • METHOD AND APPARATUS FOR DETERMINING OPTICAL DISC RECORDING PARAMETERS
    • 确定光盘记录参数的方法和设备
    • WO2006018770A2
    • 2006-02-23
    • PCT/IB2005/052601
    • 2005-08-04
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.TAO, JingTANG, FulongZHONG, Jianyi
    • TAO, JingTANG, FulongZHONG, Jianyi
    • G11B7/00
    • G11B7/1267G11B7/00456G11B7/00736
    • A method and apparatus for determining the parameters for disc recording is provided. For those discs that haven't pre-stored recording information or have pre-stored recording information not meeting the quality requirement, according to the method of the present invention, set the initial values of record strategy parameters firstly, then perform disc recording test with a group of parameters that have close relevancy among each other according to the method designed in the experiment, and finally determine the relationship between each optimal parameters and the optical disc recording quality, so that optimal parameters value corresponding to each parameter can be obtained for disc recording. According to the present invention, the optimal disc recording parameters can be determined within the limited time and limited space of disc recording test.
    • 提供了用于确定用于盘记录的参数的方法和设备。 对于没有预先存储记录信息或者预存的记录信息不符合质量要求的光盘,按照本发明的方法,首先设置记录策略参数的初始值,然后进行光盘记录测试 根据实验中设计的方法确定一组相互紧密相关的参数,最终确定各个最优参数与光盘记录质量的关系,从而得到各个参数对应的最优参数值 记录。 根据本发明,可以在盘记录测试的有限时间和有限空间内确定最佳盘记录参数。
    • 10. 发明公开
    • METHOD FOR EVALUATING THE SOLUBILITY OF A CRYSTALLINE SUBSTANCE IN A POLYMER
    • 评价聚合物中结晶物质溶解度的方法
    • EP2526413A1
    • 2012-11-28
    • EP11700563.7
    • 2011-01-21
    • Abbott GmbH & Co. KG
    • ZHANG, Geoff G. Z.YU, LianTAO, JingSUN, YeMAEGERLEIN, Markus
    • G01N25/48G01N33/15
    • G01N33/15G01N25/4866G01N2013/006
    • A method for evaluating the solubility of a crystalline substance in a polymer comprises a) providing at least one sample of an intimate crystalline substance/polymer mixture at a predetermined crystalline substance concentration; b) annealing the sample at a constant temperature T
      a for a period of time; c) heating the annealed sample while recording the heat flux over time by DSC; d) identifying a DSC dissolution endotherm in the recorded heat flux, if any; e) considering the crystalline substance concentration as a concentration above the crystalline substance solubility in the polymer at temperature T
      a when there is a DSC dissolution endotherm identified, and considering the crystalline substance concentration as a concentration less than or equal to the crystalline substance solubility in the polymer at temperature T
      a when there is no DSC dissolution endotherm identified. Thus, the method yields the upper and lower bounds for the equilibrium solubility at a given temperature or the upper and lower bounds for the equilibrium solubility temperature at a given crystalline substance concentration. The method improves accuracy of measurement near the glass transition temperature.
    • 用于评估结晶物质在聚合物中的溶解度的方法包括:a)提供至少一种处于预定结晶物质浓度的紧密结晶物质/聚合物混合物的样品; b)在恒定温度T a下将样品退火一段时间; c)加热退火的样品,同时通过DSC随时间记录热通量; d)确定记录的热通量中的DSC溶解吸热(如果有的话); e)当鉴定到DSC溶解吸热时,将结晶物质浓度视为高于聚合物中结晶物质溶解度的温度T a时的浓度,并且将结晶物质浓度视为低于或等于结晶物质在 在没有DSC溶解吸热峰确定时在温度T a下的聚合物。 因此,该方法得到给定温度下平衡溶解度的上限和下限或给定结晶物质浓度下平衡溶解度温度的上限和下限。 该方法提高了玻璃化转变温度附近的测量精度。