Cellulose ester hollow fiber membrane for plasma separation
    31.
    发明授权
    Cellulose ester hollow fiber membrane for plasma separation 失效
    用于血浆分离的纤维素酯中空纤维膜

    公开(公告)号:US4808312A

    公开(公告)日:1989-02-28

    申请号:US900584

    申请日:1986-08-26

    摘要: A hollow fiber membrane made of a cellulose ester having a membrane thickness of not more than 75 .mu.m, and having void volume (x, % by volume) of the membrane and a rate of ultrafiltration (y, ml/m.sup.2.hr.mmHg) satisfying the following formula:55x-2500.ltoreq.y.ltoreq.48x+600wherein x.gtoreq.60,and further has a .beta.-lipoprotein sieving coefficient (sc) of not less than 0.95, and preferably having further not more than 2% of change ratio in the axial direction and in the radial direction when dipped freely in water at 121.degree. C. for 20 minutes. Said hollow fiber membrane is useful for the medical use, such as the exchange of plasma in patients, collection of plasma from healthy donor, the pre-treatment of plasma for the collection and purification of valuable materials contained in plasma.

    摘要翻译: 由膜厚不大于75μm,膜的空隙体积(x,体积%)和超滤速度(y,ml / m2.hr.mmHg)的纤维素酯制成的中空纤维膜 )满足下列公式:55x-2500 = = 60,并且还具有不小于0.95的β-脂蛋白筛分系数(sc),并且优选具有不超过 在121℃下在水中自由浸渍20分钟时,在轴向和径向上的变化率的2%以上。 所述中空纤维膜可用于医疗用途,例如患者血浆的交换,来自健康供体的血浆的收集,等离子体的预处理,用于收集和纯化血浆中包含的有价物质。

    Solar heat collector
    32.
    发明授权
    Solar heat collector 失效
    太阳能集热器

    公开(公告)号:US4791910A

    公开(公告)日:1988-12-20

    申请号:US622403

    申请日:1984-06-21

    IPC分类号: F24J2/26 F24J2/50 F24J2/51

    摘要: A solar heat collector, in which an absorber plate is located in a box member provided at one surface thereof with a transparent sheet, being of such an arrangement that the absorber plate has been subjected at the surface thereof to a selective absorption surface treatment and a transparent heat trap formed of a fluoroplastics film and having a height of about 1/2 of the interval across the transparent sheet and the absorber plate is disposed between the transparent sheet and the absorber plate in contact with the transparent sheet. With this arrangement, the heat losses caused by convection, radiation and conduction can be suppressed at the same time.

    摘要翻译: 一种太阳能热收集器,其中吸收器板位于设置在其一个表面上的透明片材的盒构件中,其特征在于,吸收板在其表面上经历了选择性吸收表面处理,并且 由氟塑料膜形成的透明隔热片设置在与透明片接触的透明片和吸收体板之间,透明片和吸收板的间隔的大约1/2的高度。 通过这种布置,可以同时抑制由对流,辐射和传导引起的热损失。

    Power control circuit for a color encoder of a video camera
    33.
    发明授权
    Power control circuit for a color encoder of a video camera 失效
    用于摄像机颜色编码器的功率控制电路

    公开(公告)号:US4700221A

    公开(公告)日:1987-10-13

    申请号:US866408

    申请日:1986-05-23

    摘要: A power control circuit for a color encoder of a video camera having a camera head portion, a signal processing circuit for generating a luminance signal and a chrominance signal, a color encoder supplied with the luminance signal and the chrominance signal and for generating a composite video signal, and an external output terminal at which the composite video signal is obtained includes a power switch for controlling the power supply to the color encoder, a comparator connected to the external output terminal and for comparing the level of a synchronizing signal at the external output terminal with a reference level and a control circuit supplied with the output of the comparator and for controlling the power switch such that the power switch is turned on when the external output terminal is terminated.

    摘要翻译: 一种用于具有相机头部的摄像机的彩色编码器的电源控制电路,用于产生亮度信号和色度信号的信号处理电路,提供有亮度信号和色度信号的彩色编码器,并用于产生复合视频 信号和获得复合视频信号的外部输出端子包括用于控制对彩色编码器的电源的电源开关,连接到外部输出端子的比较器,用于比较外部输出端的同步信号的电平 具有参考电平的端子和与比较器的输出端相连的控制电路,并用于控制电源开关,使得当外部输出端子端接时,电源开关导通。