摘要:
For determining the urea concentration in liquids in continuous operation, with high sensitivity and reliable determination of the urea content over an extended period of time, an electrode which is separated from the urea containing liquid by means of a diaphragm with a diffusion coefficient of less than 10.sup.-7 cm.sup.2 s.sup.-1 for urea has impressed on it potentiostatically and cyclically, two potential values, the more positive potential being between 0.9 and 2.0. V/H.sub.2 rev and the more negative potential being lower than 0.6 V/H.sub.2 rev, and at the more positive potential, the current flowing within a predetermined time interval is evaluated as the measuring signal.
摘要翻译:为了在连续操作中确定液体中的尿素浓度,在长时间内具有高灵敏度和可靠地测定尿素含量的电极,通过具有扩散系数小于10nm的膜片与含尿素的液体分离的电极 对于尿素,10-7 cm2 s-1对其进行了静电和循环印迹,有两个潜在值,正电位介于0.9和2.0之间。 V / H2rev,负电位低于0.6V / H2rev,在正电位下,将在预定时间间隔内流动的电流作为测量信号。
摘要:
A method for the manufacture of electrodes for electrochemical cells, is provided in which a Raney rare-metal catalytic layer is disposed on a metallic support structure in layer form. According to the invention, the Raney rare-metal catalytic layer is prepared by dissolving the inactive component of a layer, disposed on the support structure, of a homogeneous alloy of at least one of the metals of the platinum group of the periodic system of the elements as the active component and at least one of the metals of the iron group of the periodic system of the elements as the inactive component; the content of inactive component being at least 65 atom-percent.
摘要:
A projection exposure method for the exposure of a radiation-sensitive substrate arranged in the region of an image surface of a projection objective with at least one image of a pattern of a mask arranged in the region of an object surface of the projection objective includes exposing the substrate with the image of the pattern in an effective image field of the projection objective during an exposure time interval and also altering a relative positioning between a surface of the substrate and a focus surface of the projection objective during the exposure time interval in such a way that image points in the effective image field are exposed with different focus positions of the image of the mask during the exposure time interval. An active compensation of at least one portion of at least one imaging aberration induced by the change in the focus positions during the exposure time interval has the effect that the imaging quality is not significantly impaired by the alteration of the focusing during the exposure time interval.
摘要:
A projection exposure method for the exposure of a radiation-sensitive substrate arranged in the region of an image surface of a projection objective with at least one image of a pattern of a mask arranged in the region of an object surface of the projection objective includes exposing the substrate with the image of the pattern in an effective image field of the projection objective during an exposure time interval and also altering a relative positioning between a surface of the substrate and a focus surface of the projection objective during the exposure time interval in such a way that image points in the effective image field are exposed with different focus positions of the image of the mask during the exposure time interval. An active compensation of at least one portion of at least one imaging aberration induced by the change in the focus positions during the exposure time interval has the effect that the imaging quality is not significantly impaired by the alteration of the focusing during the exposure time interval.
摘要:
Porous vitreous carbon with good electrical and mechanical properties as well as large double-layer capacitance can be produced by hardening and pyrolysis of thermosetting carbonizable resins including about 1 to 10 weight-percent of a salt of a fatty acid having about 10 to 20 carbon atoms which is soluble in the resin and can be volatilized without residue.