公开(公告)号：US20050025196A1

公开(公告)日：2005-02-03

申请号：US10632885

申请日：2003-08-01

申请人： Edward Chang

发明人： Edward Chang

IPC分类号： H04J3/04

CPC分类号： H04J3/047

摘要： A multiplexor circuit comprising a plurality of data connections, first stage logic configured to receive a first data word from one of the connections and to transmit the first data word received, and second stage logic configured to receive the first data word from the first stage logic and to select a selected data word between the first data word and a second data word received from another of the plurality of data connections based upon a set of select signals, the second stage logic configured to transmit the selected data word.

摘要翻译： 一种多路复用器电路，包括多个数据连接，第一级逻辑被配置为从所述连接之一接收第一数据字并发送所接收的第一数据字;以及第二级逻辑，被配置为从所述第一级逻辑 并且基于一组选择信号来选择在所述第一数据字和从所述多个数据连接中的另一数据连接接收的第二数据字之间的所选择的数据字，所述第二级逻辑被配置为发送所选择的数据字。

公开(公告)号：US06337190B1

公开(公告)日：2002-01-08

申请号：US09466257

申请日：1999-12-17

申请人： Tzann-Shun Hwang ,  Szu-Pei Wu ,  Hsin-Hua Chou ,  Hwa-Yi Chen ,  Lung-Shen Lin ,  Hsin Tsai ,  Edward Chang

发明人： Tzann-Shun Hwang ,  Szu-Pei Wu ,  Hsin-Hua Chou ,  Hwa-Yi Chen ,  Lung-Shen Lin ,  Hsin Tsai ,  Edward Chang

IPC分类号： C12N900

CPC分类号： C12N9/1096 ,  C12P35/04

摘要： The present invention relates to mutant D-amino acid aminotransferase, including nucleic acids encoding mutant D-amino acid aminotransferase. The mutant D-amino acid aminotransferase of the present invention is obtained by the substitution of the glutamate residue at position 13 of wild type D-amino acid aminotransferase from Bacillus sphaericus with hydrophobic amino acids. The mutant D-amino acid aminotransferase can be used in the production of D-amino acid and the conversion of glutaryl-7-aminocephalosporanic acid from cephalosporin C. The present invention also includes replica-paper staining method for screening the cells expressing high DAT activity.

摘要翻译： 本发明涉及突变型D-氨基酸氨基转移酶，包括编码突变型D-氨基酸氨基转移酶的核酸。 通过用疏水性氨基酸取代来自球形芽孢杆菌的野生型D-氨基酸氨基转移酶的13位的谷氨酸残基获得本发明的突变型D-氨基酸氨基转移酶。 突变型D-氨基酸氨基转移酶可用于D-氨基酸的生产和戊二酰-7-氨基头孢菌酸从头孢菌素C的转化。本发明还包括用于筛选表达高DAT活性的细胞的复制纸染色方法 。

公开(公告)号：US5415897A

公开(公告)日：1995-05-16

申请号：US216701

申请日：1994-03-24

申请人： Edward Chang ,  Shuen-Cheng Hwang ,  Paul Stratton

发明人： Edward Chang ,  Shuen-Cheng Hwang ,  Paul Stratton

IPC分类号： B05D1/06 ,  B05D1/02 ,  B23K1/20 ,  H05K3/34

CPC分类号： H05K3/3489 ,  B05D1/02 ,  B05D1/025

摘要： A method of depositing a solid substance on the surface of the substrate in which the solid substance is dissolved in a solvent to create a first solution. The solid substance is less freely divided prior to dissolution than when deposited on the substrate and the deposition density of the solid substance on the substrate is regulated at least in part by solid substance concentration. The solid substance is insoluble in a liquified gas and the first solution is soluble in the liquified gas. The solvent also is capable of depressing the freezing point of the liquified gas upon expansion of the liquified gas. The first solution is dissolved in the liquified gas to create a second solution having a sufficient concentration of the solvent relative to the liquified gas that solidification of the liquified gas is substantially prevented upon the expansion thereof. Preferably, this concentration of solvent is a minimum to prevent overuse of environmentally hazardous solvents. The solution is sprayed against the substrate so that a portion of the liquified gas flashes into a vapor and the second solution containing a remaining portion of the liquified gas contacts and thereby coats the surface substrate. The remaining portion of the liquified gas is evaporated along with the solvent, so that the solid substance remains as a deposit on the substrate. The method has particular application to making very free depositions such as are required in the electronics industry to coat contacts of printed circuit boards with flux prior to soldering.

摘要翻译： 在固体物质溶解在溶剂中以形成第一溶液的基材表面上沉积固体物质的方法。 固体物质在溶解前比在沉积在基材上时更不自由地分离，并且固体物质在基材上的沉积密度至少部分地由固体物质浓度调节。 固体物质不溶于液化气体，第一溶液可溶于液化气体。 溶剂也能够在液化气膨胀时抑制液化气体的凝固点。 将第一溶液溶解在液化气体中以产生相对于液化气体具有足够浓度的溶剂的第二溶液，其中液化气体的固化在其膨胀时被基本上防止。 优选地，该浓度的溶剂是防止过度使用有害环境的溶剂的最小值。 将溶液喷涂在基材上，使得一部分液化气体闪蒸成蒸气，并且含有剩余部分液化气体的第二溶液接触并由此涂覆表面基材。 液化气体的剩余部分与溶剂一起蒸发，使得固体物质作为沉积物保留在基材上。 该方法特别适用于制造非常自由的沉积物，例如在电子工业中需要在焊接之前用焊剂涂布印刷电路板的触点。