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    • 4. 发明申请
    • PROCESS FOR PREPARATION OF MONODISPERSED BARIUM CONTAINING FERRITES
    • 用于制备含有黑麦糖的单体混合物的方法
    • WO1988005337A1
    • 1988-07-28
    • PCT/US1988000083
    • 1988-01-14
    • CLARKSON UNIVERSITY
    • CLARKSON UNIVERSITYMATIJEVIC, Egon
    • B01J13/00
    • B03C1/01A61K9/5094C01G49/0036C01P2004/38C01P2004/52C01P2004/62C01P2006/42C01P2006/60C04B35/2683H01F1/445
    • An improved process for preparation of well-defined monodispersed colloidal particles of barium containing ferrites. This process involves the formation of colloidal barium ferrite particles in aqueous media by phase transformation of a ferrous hydroxide gel in the presence of barium ions. In this process, a magnetite is initially formed in aqueous solution and barium substituted into the resultant particle by displacement of Fe . This procedure is performed in a nonoxidizing atmosphere and under mildly caustic conditions. As the reaction proceeds to completion (aging) the system becomes decidedly more acidic. The colloidal particles produced in accordance with this invention are easily dispersible in aqueous media and, unlike magnetite, are superparamagnetic in response to a magnetic field. This procedure is in sharp contrast to more traditional methods of solid state transformations of the magnetite to ferrite at temperatures typically in excess of 1000 DEG C.
    • 用于制备含钡铁氧体的明确定义的单分散胶体颗粒的改进方法。 该方法包括在钡离子存在下通过氢氧化亚铁凝胶的相转化在水介质中形成胶态钡铁氧体颗粒。 在这个过程中,最初在水溶液中形成磁铁矿,并通过置换Fe 2+将钡取代成所得颗粒。 该方法在非氧化气氛和弱苛性条件下进行。 当反应进行到完成(老化)时,系统变得更加酸性。 根据本发明生产的胶体颗粒易于分散在水性介质中,并且与磁铁矿不同,响应于磁场而具有超顺磁性。 该过程与在通常超过1000℃的温度下磁铁矿固体转化为铁素体的传统方法形成鲜明对照。
    • 5. 发明申请
    • ADJUSTABLE LENGTH ORTHOPEDIC DEVICE
    • 可调节长度正交装置
    • WO2013181659A1
    • 2013-12-05
    • PCT/US2013/043900
    • 2013-06-03
    • CLARKSON UNIVERSITYCLARK, Alexander Martin
    • CLARK, Alexander MartinKUXHAUS, Laurel
    • A61B17/56A61B17/70A61B17/86
    • A61B17/7216A61B17/7233A61B17/725A61B17/744A61B17/8685
    • An adjustable length orthopedic device and system. According to one embodiment, the adjustable length orthopedic device or system comprises an elongated shaft with a longitudinal axis, and an adjustable portion extending from a proximal end of the elongated shaft along the longitudinal axis. The adjustable length orthopedic device further comprises at least one hole in a distal end portion of the device, where the hole is adapted for insertion of a pin through the device and into the bone in order to anchor the device to the bone. According to another embodiment is a lag screw extending from a proximal end of the elongated shaft at an angle oblique to the longitudinal axis, the lag screw comprising a lag screw shaft segment, and an adjustable segment that extends from the proximal end of the shaft segment. According to another embodiment is an adjustable length locking screw.
    • 可调长度的矫形装置和系统。 根据一个实施例,可调整长度的矫形装置或系统包括具有纵向轴线的细长轴和从长轴的纵向轴线延伸的可调节部分。 所述可调整长度的矫形装置还包括在所述装置的远端部分中的至少一个孔,其中所述孔适于将销插入穿过所述装置并进入所述骨中,以将所述装置锚固到所述骨上。 根据另一个实施例,拉杆螺钉从细长轴的近端以与纵向轴线倾斜的角度延伸,拉力螺钉包括拉力螺杆轴段,以及从轴段的近端延伸的可调段 。 根据另一实施例是可调节长度的锁定螺钉。