公开(公告)号：US4887434A

公开(公告)日：1989-12-19

申请号：US235367

申请日：1988-08-23

申请人： Gunter Pilwat ,  Jochen Rudolph

发明人： Gunter Pilwat ,  Jochen Rudolph

IPC分类号： B01D8/00 ,  G01N30/00

CPC分类号： B01D8/00 ,  G01N30/00

摘要： Samples of trace substances are cryogenically concentrated by passing a gas sample through a U-bend immersed in liquid nitrogen. The U-bend is surrounded by a chamber wall and the chamber is vented so that liquid nitrogen can rise into the chamber when the vent is open but is driven out when the vent is closed and the enrichment pipe is heated to desorb the accumulated trace substances from the adsorbent in the enrichment pipe.

摘要翻译： 通过将气体样品通过浸没在液氮中的U形弯曲而将痕量物质的样品低温浓缩。 U形弯曲部被室壁包围，并且腔室被排出，使得当通风口打开时液氮可以上升到室中，但是当通风口关闭时被驱出并且富集管被加热以解吸积累的痕量物质 从富集管中的吸附剂。

公开(公告)号：US06690229B2

公开(公告)日：2004-02-10

申请号：US10323352

申请日：2002-12-18

申请人： Jochen Rudolph

发明人： Jochen Rudolph

IPC分类号： G05F110

CPC分类号： G05F3/262

摘要： In a current-source circuit in which a first and a second MOS field-effect transistor form a current mirror circuit, wherein a reference current can be supplied to the first MOS field-effect transistor via a third MOS field-effect transistor connected in cascode and the drain electrode of a fourth MOS field-effect transistor connected to the second MOS field-effect transistor in cascode forms an output, the source electrodes of the third and of the fourth MOS field-effect transistors are connected to inputs of an automatic gain control amplifier whose output is connected to the gate electrode of the fourth MOS field-effect transistor. The fourth MOS field-effect transistor is an extended-drain MOS field-effect transistor. The drain electrode and the gate electrode of the fourth MOS field-effect transistor are connected to one another via a further MOS field-effect transistor whose gate electrode is acted on by an operating voltage for the circuit.

摘要翻译： 在第一和第二MOS场效应晶体管形成电流镜电路的电流源电路中，其中可以通过串联连接的第三MOS场效应晶体管将参考电流提供给第一MOS场效应晶体管 并且以级联连接到第二MOS场效应晶体管的第四MOS场效应晶体管的漏极形成输出，第三和第四MOS场效应晶体管的源极连接到自动增益的输入 控制放大器，其输出端连接到第四MOS场效应晶体管的栅电极。 第四MOS场效应晶体管是延伸漏极MOS场效应晶体管。 第四MOS场效应晶体管的漏电极和栅电极经由另一MOS场效应晶体管彼此连接，栅极通过其作用于电路的工作电压。

公开(公告)号：US5266408A

公开(公告)日：1993-11-30

申请号：US804658

申请日：1991-12-11

申请人： Uwe Keppeler ,  Hermann Dikow ,  Helmut Auweter ,  Michael Bobrich ,  Jochen Rudolph ,  Gregor Brodt ,  Albert Kohl ,  Werner Lenz ,  Rudolf Suettinger

发明人： Uwe Keppeler ,  Hermann Dikow ,  Helmut Auweter ,  Michael Bobrich ,  Jochen Rudolph ,  Gregor Brodt ,  Albert Kohl ,  Werner Lenz ,  Rudolf Suettinger

IPC分类号： C08G18/65 ,  C08G18/08 ,  C08G18/12 ,  C09D5/00 ,  C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  B32B27/40 ,  G11B5/70

CPC分类号： G11B5/7021 ,  C08G18/0828 ,  C08G18/12 ,  Y10S428/90 ,  Y10T428/31609

摘要： Magnetic recording media consist of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consisting of not less than 50% by weight of a branched polyurethane elastomer having sulfonate groups and possessing urea groups at the chain ends.

摘要翻译： 磁性记录介质由非磁性基材和一个或多个可粘结在其上的可磁化层组成，基于聚氨酯粘合剂，粘合剂由不少于50重量％的具有磺酸酯基的支链聚氨酯弹性体和链末端具有脲基组成 。

公开(公告)号：US4992083A

公开(公告)日：1991-02-12

申请号：US438078

申请日：1989-11-20

申请人： Klaus-Peter Mueller ,  Jochen Rudolph

发明人： Klaus-Peter Mueller ,  Jochen Rudolph

IPC分类号： B01D8/00 ,  G01N30/00 ,  G01N30/08 ,  G01N30/12 ,  G01N30/40 ,  G01N30/46

CPC分类号： G01N30/461 ,  B01D8/00 ,  G01N30/08 ,  G01N30/40 ,  G01N2030/121 ,  G01N2030/407 ,  G01N30/468

摘要： For intermediate enrichment of trace substances from a gas stream, a cold ap is used which carries a flow and optionally contains an adsorbent material and which is surrounded by a gas-tight double-walled jacket into which cooling fluid from a surrounding cooling bath can penetrate via an extension tube at the bottom. For desorption, the cooling fluid is expelled from the double-walled jacket via compressed air and a valve control. A pipe loop connected to the double-walled jacket and having a heater winding and circulation pump allows rapid heating of the cold trap. A level control apparatus connected to the compressed-air line allows sensitive level adjustment in the bottom extension tube of the double-walled jacket during the desorption phase. Such a cold trap is advantageous, inter alia, in a chromatography arrangement with a separation column and fractionating column of high resolution and sensitivity.

摘要翻译： 对于来自气流的痕量物质的中间富集，使用冷阱，其携带流动并任选地包含吸附剂材料，并且由气密双壁套管围绕，来自周围冷却浴的冷却流体可以穿透入其中 通过底部的延长管。 为了解吸，冷却液通过压缩空气和阀门控制从双壁套管排出。 连接到双壁套管并具有加热器绕组和循环泵的管道环路允许冷阱的快速加热。 连接到压缩空气管线的液位控制装置允许在解吸阶段期间在双壁夹套的底部延伸管中进行敏感的水平调节。 这种冷阱特别优选在具有高分辨率和灵敏度的分离塔和分馏塔的色谱装置中。