Chemical modification of shaped hydrogels in non-aqueous medium
    2.
    发明授权
    Chemical modification of shaped hydrogels in non-aqueous medium 失效
    非水介质中形状水凝胶的化学改性

    公开(公告)号:US5530111A

    公开(公告)日:1996-06-25

    申请号:US296171

    申请日:1994-08-29

    CPC分类号: C08B3/00 C08B3/14

    摘要: A method is described for the chemical modification of pre-shaped hydrogels in non-aqueous medium. The conditions permit the reaction of highly expanded, porous hydrogel particles, such as spherical beads, using pseudo homogeneous reaction conditions in the absence of water. The method involves a three step procedure in which the porous gels are solvent exchanged int a water-free solvent (step 1) with minimal change in gel dimension and porosity; followed by reaction under non-aqueous condition (step 2); and followed by solvent exchange into water (step 3). Many different types of reactions requiring non-aqueous conditions may be carried out using these conditions. The method has particularly been demonstrated for crosslinking fluorinating beads, and for esterifying beads in a reaction involving multifunctional free carboxylic acids in the presence of dicyclohexylcarbodiimide (DCC).

    摘要翻译: 描述了一种用于非水介质中预形状水凝胶的化学改性的方法。 该条件允许在不存在水的情况下使用假均匀反应条件使高度膨胀的多孔水凝胶颗粒如球形珠的反应。 该方法涉及三步法,其中多孔凝胶在无水溶剂(步骤1)中溶剂交换,凝胶尺寸和孔隙率变化最小; 然后在非水条件下反应(步骤2); 然后进行与水的溶剂交换(步骤3)。 可以使用这些条件进行需要非水性条件的许多不同类型的反应。 特别是在二环己基碳化二亚胺(DCC)的存在下,涉及氟化珠的交联以及涉及多官能游离羧酸的反应中的酯化珠粒的方法。

    Metered dose inhaler fomulations which include the ozone-friendly
propellant HFC 134a and a pharmaceutically acceptable suspending,
solubilizing, wetting, emulsifying or lubricating agent
    3.
    发明授权
    Metered dose inhaler fomulations which include the ozone-friendly propellant HFC 134a and a pharmaceutically acceptable suspending, solubilizing, wetting, emulsifying or lubricating agent 失效
    计量剂量吸入器制剂,其包括适用于臭氧的推进剂HFC 134a和药学上可接受的悬浮剂,增溶剂,润湿剂,乳化剂或润滑剂

    公开(公告)号:US5492688A

    公开(公告)日:1996-02-20

    申请号:US217012

    申请日:1994-03-23

    IPC分类号: A61K9/00 A61K9/12

    CPC分类号: A61K9/008 Y10S514/958

    摘要: Metered dose inhaler (MDI) formulations which utilize 1,1,1,2-tetrafluoroethane (HFC 134a) as the sole propellant are made practical by including a polar surfactant such as polyethylene glycol, diethylene glycol monoethyl ether, polyoxyethylene (20) sorbitan monolaurate, polyoxyethylene (20) sorbitan monooleate, propoxylated polyethylene glycol, and polyoxyethylene (4) lauryl ether for suspending, solubilizing, wetting and emulsifying the drug constituent and lubricating the valve components of the MDI.

    摘要翻译: 使用1,1,1,2-四氟乙烷(HFC 134a)作为唯一推进剂的计量吸入器(MDI)制剂通过包括极性表面活性剂如聚乙二醇,二甘醇单乙醚,聚氧乙烯(20)脱水山梨糖醇单月桂酸酯 ,聚氧乙烯(20)脱水山梨糖醇单油酸酯,丙氧基化聚乙二醇和聚氧乙烯(4)月桂基醚,用于悬浮,增溶,润湿和乳化药物成分并润滑MDI的阀组件。

    Soft-switching PWM converters
    4.
    发明授权
    Soft-switching PWM converters 失效
    软开关PWM转换器

    公开(公告)号:US5442540A

    公开(公告)日:1995-08-15

    申请号:US903859

    申请日:1992-06-25

    IPC分类号: H02M3/158 H02M7/5387

    CPC分类号: H02M3/158 Y02B70/1425

    摘要: A full-bridge zero-voltage-switching pulse-width-modulated converter employs a saturable reactor in place of the linear inductor in order to reduce current stress on the active switches, reduce voltage stress on the rectifier diodes, and reduce secondary parasitic ringing. The zero-current-switching full-bridge pulse-width-modulated converter embodiment of the invention contemplates the provision of active switches that are zero-current-switched and passive switches, such as diode switches, that are zero-voltage-switched.

    摘要翻译: 全桥零电压开关脉宽调制转换器采用可饱和电抗器代替线性电感器,以减少有源开关上的电流应力,减少整流二极管的电压,并减少次级寄生振铃。 本发明的零电流切换全桥脉宽调制转换器实施例设想提供零电流开关和无电压开关(例如二极管开关)的有源开关,其为零电压切换。

    Methods of preparing polymeric ketones
    5.
    发明授权
    Methods of preparing polymeric ketones 失效
    制备聚合酮的方法

    公开(公告)号:US5442029A

    公开(公告)日:1995-08-15

    申请号:US296135

    申请日:1994-08-26

    摘要: A new method for preparing commercially valuable polymeric ketones is described. The method employs an .alpha.-amiononitrile as a monomeric unit whereby an amorphous, soluble polymer having protected carbonyl moiety is obtained. Upon deprotecting the carbonyl moiety, a crystalline polymeric ketone is obtained. The method allows production of polymeric ketone materials having aromatic, aliphatic or mixed aromatic/aliphatic backbones.

    摘要翻译: 描述了制备商业上有价值的聚合酮的新方法。 该方法采用α-戊二腈作为单体单元,从而得到具有保护的羰基部分的无定形可溶性聚合物。 在羰基部分脱保护后,得到结晶聚合酮。 该方法允许制备具有芳族,脂族或混合芳族/脂族主链的聚合酮材料。

    Elastic-part immersion cell for analyzing microstructures in materials
    6.
    发明授权
    Elastic-part immersion cell for analyzing microstructures in materials 失效
    用于分析材料中微观结构的弹性部分浸渍池

    公开(公告)号:US5422718A

    公开(公告)日:1995-06-06

    申请号:US59906

    申请日:1993-05-10

    申请人: Alan J. Anderson

    发明人: Alan J. Anderson

    IPC分类号: G01N21/01 G02B21/33

    CPC分类号: G02B21/33 G01N21/01

    摘要: The elastic-port immersion cell (10) is an optical oil immersion vessel which has a flexible latex (or other) sheath (24) protruding from its sidewall. The sheath is affixed to an opening in the wall of the vessel using a collar, O-ring (26) or other connecting means. The base of the vessel is an optical glass window. A sample (20) mounted on to the end of spindle (14) is placed into the cell. The end of the spindle (14), without the sample, is inserted into the sheath and the latex together with the spindle is attached to a goniometer head of a spindle stage such that the spindle is horizontal. Immersion oil (22) that has a refractive index similar to the sample is added to the cell until the sample is totally submerged. Minute features within the sample (20) may then be observed under the microscope as the sample is rotated 360 degrees about a vertical or horizontal axis. The latex sheath prevents the oil from escaping from the cell and also provides the flexibility required to orient and rotate a sample.

    摘要翻译: 弹性端口浸渍电池(10)是具有从其侧壁突出的柔性胶乳(或其它)护套(24)的光学浸油容器。 使用套环O形环(26)或其他连接装置将护套固定在容器壁上的开口处。 容器的底部是光学玻璃窗。 将安装在主轴(14)端部上的样品(20)放入电池中。 没有样品的主轴(14)的端部插入护套中,并且与主轴一起的胶乳被连接到主轴台的测角器头部,使得主轴是水平的。 将具有与样品相似的折射率的浸入油(22)加入到电池中,直到样品完全浸没。 然后可以在显微镜下观察样品(20)内的分钟特征,因为样品围绕垂直或水平轴线旋转360度。 胶乳护套防止油从细胞中逸出,并且还提供了定向和旋转样品所需的灵活性。

    Fine powders of ketone-containing aromatic polymers and process of
manufacture
    7.
    发明授权
    Fine powders of ketone-containing aromatic polymers and process of manufacture 失效
    含酮芳香族聚合物的细粉和制造工艺

    公开(公告)号:US5357040A

    公开(公告)日:1994-10-18

    申请号:US22049

    申请日:1993-02-24

    摘要: Fine particles of semi-crystalline ketone-containing aromatic polymers (PEEK, PEKK, etc.) are produced by controlling the rate and conditions of hydrolysis of an amorphous polyarylketimine intermediate. The choice of acid and its concentrations affects the rate of ketimine hydrolysis and subsequent particle formation. In addition, zero or reduced amounts of agitation during hydrolysis has been found to promote the formation of smaller (submicron) sized particles which are spherical in shape, while greater amounts of agitation or shear stress applied during hydrolysis results in nonspherical, larger particles. Carbon fiber reinforced composites were made from aqueous suspensions of these particles that were dispersed or stabilized by a water soluble polymer.

    摘要翻译: 通过控制无定形聚芳基酮亚胺中间体的水解速率和条件来制备含半结晶酮芳族聚合物(PEEK,PEKK等)的微粒。 酸和其浓度的选择影响酮亚胺水解和随后的颗粒形成速率。 此外,已经发现在水解期间零或减少的搅拌量促进了形状为球形的较小(亚微米)尺寸的颗粒的形成,而在水解期间施加的较大量的搅拌或剪切应力导致非球形的较大颗粒。 碳纤维增强复合材料由水溶性聚合物分散或稳定的这些颗粒的水悬浮液制成。

    Eye movement and pupil diameter apparatus and method
    10.
    发明授权
    Eye movement and pupil diameter apparatus and method 失效
    眼睛运动和瞳孔直径设备和方法

    公开(公告)号:US5204703A

    公开(公告)日:1993-04-20

    申请号:US713969

    申请日:1991-06-11

    摘要: A subject's eye movement and pupil diameter are measured while the subject is exposed to visual stimuli. The apparatus and method utilizes an eye-look detector to determine a subject's visual examination of a presented image and by computer recording an analysis superimposes icons representing the lookpoints over the image. The apparatus and method are not only of value in running routine tests but also may be used for new experiments.

    摘要翻译: 在受试者暴露于视觉刺激下,测量受试者的眼睛运动和瞳孔直径。 该装置和方法利用眼睛检测器来确定被摄体对所呈现的图像的视觉检查,并且通过计算机记录分析,将表示视点的图标叠加在图像上。 该装置和方法不仅在运行常规测试中具有价值,而且可用于新的实验。