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1. 发明授权

US4754800A Preventing undissolved alloying ingredient from entering continuous casting mold 失效
标题翻译：防止未溶解的合金成分进入连铸模具
公开(公告)号：US4754800A
公开(公告)日：1988-07-05
申请号：US88526
申请日：1987-08-21
申请人： Charles R. Jackson , Daniel Rellis, Jr. , Howard M. Pielet , Debanshu Bhattacharya , Larry A. Frank , Purnendu Dasgupta , John R. Knoepke
发明人： Charles R. Jackson , Daniel Rellis, Jr. , Howard M. Pielet , Debanshu Bhattacharya , Larry A. Frank , Purnendu Dasgupta , John R. Knoepke
IPC分类号： B22D11/118 , C21C7/04 , B22D1/00
CPC分类号： C21C7/04 , B22D11/118
摘要： Molten steel containing an undissolved alloying ingredient denser than molten steel (e.g. Pb and/or Bi) flows from a tundish to a continuous casting mold. Various expedients are employed to prevent large globules of undissolved alloying ingredient from flowing out of the tundish into the mold. Another expedient prevents large quantities of undissolved alloying ingredient from accumulating on the bottom of the tundish.
摘要翻译：含有比钢水（例如Pb和/或Bi）更致密的未溶解合金成分的熔融钢从中间包流入连续铸模。采用各种方法来防止未溶解的合金成分的大球从中间包流出到模具中。另一个方法是防止大量未溶解的合金成分积聚在中间包的底部。

2. 发明授权

US4852632A Apparatus for preventing undissolved alloying ingredient from entering continuous casting mold 失效
标题翻译：用于防止未溶解的合金成分进入连续铸模的装置
公开(公告)号：US4852632A
公开(公告)日：1989-08-01
申请号：US259503
申请日：1988-10-17
申请人： Charles R. Jackson , Daniel Rellis, Jr. , Howard M. Pielet , Debanshu Bhattacharya , Larry A. Frank , Purnendu Dasgupta , John R. Knoepke
发明人： Charles R. Jackson , Daniel Rellis, Jr. , Howard M. Pielet , Debanshu Bhattacharya , Larry A. Frank , Purnendu Dasgupta , John R. Knoepke
IPC分类号： B22D11/10 , B22D11/118 , C21C7/04
CPC分类号： C21C7/04 , B22D11/10 , B22D11/118
摘要： Molten steel containing an undissolved alloying ingredient denser than molten steel (e.g. Pb and/or Bi) flows from a tundish to a continuous casting mold. Various expedients are employed to prevent large globules of undissolved alloying ingredient from flowing out of the tundish into the mold. Another expedient prevents large quantities of undissolved alloying ingredient from accumulating on the bottom of the tundish.
摘要翻译：含有比钢水（例如Pb和/或Bi）更致密的未溶解合金成分的熔融钢从中间包流入连续铸模。采用各种方法来防止未溶解的合金成分的大球从中间包流出到模具中。另一个方法是防止大量未溶解的合金成分积聚在中间包的底部。

3. 发明授权

US07964411B2 Membrane based concentrators 有权
标题翻译：膜基浓缩机
公开(公告)号：US07964411B2
公开(公告)日：2011-06-21
申请号：US11762000
申请日：2007-06-12
申请人： Purnendu Dasgupta , Masaki Takeuchi , Kannan Srinivasan
发明人： Purnendu Dasgupta , Masaki Takeuchi , Kannan Srinivasan
IPC分类号： G01N30/02
CPC分类号： G01N30/08 , G01N1/4005 , G01N1/4022 , G01N30/96 , G01N2001/4011 , G01N2001/4027 , G01N2030/146 , Y10T436/255
摘要： A sample concentrator for concentrating analytes in a solvent-containing liquid sample stream, including concentrator housing having a sample stream flow channel and a gas stream flow channel having an inlet and an outlet, a heater for gas in the gas stream conduit, and a hydrophilic ion exchange or non-ionic membrane barrier separating said gas stream flow channel and said sample stream flow channel. Solvent is evaporated from the liquid sample stream in said sample stream flow channel in or at the interface with said membrane, when the gas stream is at an elevated temperature. A regeneration step is used to regenerate the ion exchange membrane barrier.
摘要翻译：用于将分析物浓缩在含溶剂的液体样品流中的样品浓缩器，包括具有样品流流动通道的浓缩器壳体和具有入口和出口的气流流动通道，气流导管中的气体加热器，以及亲水分离所述气流流动通道和所述样品流流动通道的离子交换或非离子膜屏障。当气流处于升高的温度时，溶剂在所述样品流流动通道中或与所述膜的界面处从液体样品流中蒸发。再生步骤用于再生离子交换膜屏障。

4. 发明申请

US20060037911A1 Membrane based volatile component-removal devices for liquid chromatography 有权
标题翻译：用于液相色谱的膜基挥发性成分去除装置
公开(公告)号：US20060037911A1
公开(公告)日：2006-02-23
申请号：US10924236
申请日：2004-08-23
申请人： Purnendu Dasgupta , S. Ullah , Kannan Srinivasan
发明人： Purnendu Dasgupta , S. Ullah , Kannan Srinivasan
IPC分类号： B01D15/08
CPC分类号： G01N30/96 , B01D19/0031 , G01N30/34 , G01N2030/8423
摘要： In a liquid chromatographic system, removing at least part of a volatile component from the liquid sample stream after separation by flowing it through a volatile component-removal device including a porous wall having a surface coating of a permeable polymer less than 10 μm thick. A liquid chromatographic system suitable for performing the method. Also, a liquid chromatographic system in which volatile component is removed prior to separation across the same type of membrane or across a membrane made of a copolymer of perfluoro-2,2-dimethyl-1,3-dioxole.
摘要翻译：在液相色谱系统中，通过将分离后的液体样品流中的挥发性成分的至少一部分流过挥发性成分除去装置，该挥发性成分除去装置包括具有小于10μm厚的可渗透聚合物的表面涂层的多孔壁。适用于执行该方法的液相色谱系统。另外，其中挥发性组分在分离过相同类型的膜之前或通过由全氟-2,2-二甲基-1,3-二氧杂环戊烯的共聚物制成的膜上除去的液相色谱系统。

5. 发明申请

US20050045032A1 DENUDER ASSEMBLY FOR COLLECTION AND REMOVAL OF SOLUBLE ATMOSPHERIC GASES 失效
标题翻译：用于收集和清除可溶性大气气体的渗透装置
公开(公告)号：US20050045032A1
公开(公告)日：2005-03-03
申请号：US10651057
申请日：2003-08-27
申请人： Purnendu Dasgupta , Kavin Morris , Jianzhong Li
发明人： Purnendu Dasgupta , Kavin Morris , Jianzhong Li
IPC分类号： B01D53/22 , G01N1/22 , G01N1/34 , B01D46/00
CPC分类号： B01D53/228 , G01N1/2202 , G01N1/2214 , G01N1/2273 , G01N2001/2217 , G01N2001/4016 , G01N2015/0687
摘要： A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled with a sample gas source, a denuder liquid inlet fluidly coupled with a denuder liquid source, a barrier sheet extending across the internal cavity and separating the internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of the sample gas inlet, the barrier sheet having a liquid-reservoir surface and a gas-channel surface and being porous to gas and liquid; and a denuder liquid disposed in the liquid reservoir and permeating the barrier sheet to coat the gas-channel surface of the barrier sheet thereby allowing the denuder liquid on the gas-channel surface to contact the sample gas flowing within the gas flow-through channel and allowing the analyte to diffuse through the barrier sheet into the liquid reservoir. A method of using the denuder assembly for collection and removal of soluble atmospheric gases is also disclosed.
摘要翻译：一种分解器组件适于从样品气体中收集和去除气态分析物。该分解器包括壳体，该壳体包括内部空腔，与样品气体源流体耦合的样品气体入口，与溶解液体源流体连接的分离液体入口，跨过内部空腔延伸的隔离层并将内部空腔分离成液体所述阻挡片具有液体储存表面和气体通道表面，并且对于气体和液体是多孔的; 以及设置在所述液体储存器中并渗入所述阻挡片以将所述阻挡片的气体通道表面涂覆的剥离液，从而允许所述气体通道表面上的所述溶解液与所述气体流通通道内流动的样品气体接触，允许分析物通过阻挡片扩散到液体储存器中。还公开了一种使用该溶解气体组合件来收集和除去可溶性大气气体的方法。

6. 发明申请

US20050202563A1 Continuous ion species removal device and method 失效
标题翻译：连续离子种除去装置及方法
公开(公告)号：US20050202563A1
公开(公告)日：2005-09-15
申请号：US10653032
申请日：2003-08-28
申请人： Purnendu Dasgupta , Petr Kuban , Jordan Berg
发明人： Purnendu Dasgupta , Petr Kuban , Jordan Berg
IPC分类号： G01N30/00 , G01N30/06 , G01N30/60 , G01N30/96 , G01N31/00
CPC分类号： G01N30/96 , G01N30/0005 , G01N2030/009 , G01N2030/062 , G01N2030/965 , Y10T436/117497 , Y10T436/255
摘要： Apparatus and method for treating a liquid sample stream including at least one analyte ion species and matrix ion species of opposite charge to said one analyte ion species. The liquid sample stream flows through a treatment channel. A carrier liquid stream including a matrix ion species capture material flows substantially parallel to the sample stream in the treatment channel forms a liquid interface between them. The matrix ion species diffuses through the interface to contact and become bound by the capture material in said carrier liquid.
摘要翻译：用于处理液体样品流的装置和方法，所述液体样品流包括至少一种分析物离子种类和与所述一种分析物离子种类相反电荷的基质离子种类液体样品流流过治疗通道。在处理通道中基本平行于样品流流动的包含基质离子物质捕获材料的载液流形成它们之间的液体界面。基质离子物质通过界面扩散以接触并被所述载体液体中的捕获材料结合。

7. 发明申请

US20080311672A1 Membrane based concentrators 有权
标题翻译：膜基浓缩机
公开(公告)号：US20080311672A1
公开(公告)日：2008-12-18
申请号：US11762000
申请日：2007-06-12
申请人： Purnendu Dasgupta , Masaki Takeuchi , Kannan Srinivasan
发明人： Purnendu Dasgupta , Masaki Takeuchi , Kannan Srinivasan
IPC分类号： G01N30/02 , B01D1/00 , B01D1/14 , B01J19/00
CPC分类号： G01N30/08 , G01N1/4005 , G01N1/4022 , G01N30/96 , G01N2001/4011 , G01N2001/4027 , G01N2030/146 , Y10T436/255
摘要： A sample concentrator for concentrating analytes in a solvent-containing liquid sample stream, including concentrator housing having a sample stream flow channel and a gas stream flow channel having an inlet and an outlet, a heater for gas in the gas stream conduit, and a hydrophilic ion exchange or non-ionic membrane barrier separating said gas stream flow channel and said sample stream flow channel. Solvent is evaporated from the liquid sample stream in said sample stream flow channel in or at the interface with said membrane, when the gas stream is at an elevated temperature. A regeneration step is used to regenerate the ion exchange membrane barrier.
摘要翻译：用于将分析物浓缩在含溶剂的液体样品流中的样品浓缩器，包括具有样品流流动通道的浓缩器壳体和具有入口和出口的气流流动通道，气流导管中的气体加热器，以及亲水分离所述气流流动通道和所述样品流流动通道的离子交换或非离子膜屏障。当气流处于升高的温度时，溶剂在所述样品流流动通道中或与所述膜的界面处从液体样品流中蒸发。再生步骤用于再生离子交换膜屏障。

8. 发明申请

US20050244299A1 Automated sequential injection analysis systems for the determination of trace endotoxin levels 审中-公开
标题翻译：自动顺序注射分析系统，用于测定痕量内毒素水平
公开(公告)号：US20050244299A1
公开(公告)日：2005-11-03
申请号：US10512888
申请日：2003-04-30
申请人： Purnendu Dasgupta , Ronald Berzofsky , Matthew Bonen
发明人： Purnendu Dasgupta , Ronald Berzofsky , Matthew Bonen
IPC分类号： G01N33/579 , G01N1/02 , G01N33/00 , G01N35/00 , G01N35/08 , G01N35/10
CPC分类号： G01N35/1004 , G01N35/08 , G01N2001/022 , G01N2035/00673
摘要： A method used to detect endotoxin uses a system (10) having bidirectional pump (20), multiport valve (30), fluid section valve (170), fluid holding member (50), solenoid valve (60), air source (63) and detector (100). Sample, LAL reagent and chromogenic substrate fluid segments are introduced into the holding member (50) between air segments, the reagents are then mixed and introduced into the detector (100) for measurement The system can be washed with an alkaline solution and followed by cthanol, or washed with tricthylaminc followed by water.
摘要翻译：用于检测内毒素的方法使用具有双向泵（20），多端口阀（30），流体截止阀（170），流体保持构件（50），电磁阀（60），空气源（63）的系统（10）和检测器（100）。将样品，LAL试剂和显色底物流体段引入到空气段之间的保持构件（50）中，然后将试剂混合并引入检测器（100）中进行测量。系统可以用碱性溶液洗涤，然后用Cthanol ，或用三乙胺洗涤，然后用水洗涤。

9. 发明授权

US5433838A Electrophoresis with chemically suppressed detection 失效
标题翻译：电化学抑制检测
公开(公告)号：US5433838A
公开(公告)日：1995-07-18
申请号：US258126
申请日：1994-06-10
申请人： Purnendu Dasgupta , Bao Li-Yuan
发明人： Purnendu Dasgupta , Bao Li-Yuan
IPC分类号： G01N27/26 , G01N27/447 , G01N30/60 , G01N30/96
CPC分类号： G01N27/4473 , G01N2030/965
摘要： Improved capillary electrophoresis apparatus of the type that generally includes a capillary tube, the capillary tube having a sample inlet end and an outlet end, a first electrode in electrical communication with the inlet end of the capillary tube, a second electrode in electrical communication with the outlet end of the capillary tube and a high voltage power supply in electrical communication with the first and second electrodes. The improvement is to connect a miniature Ion Chromatography membrane suppressor to the outlet end of the capillary tube, to connect a conductivity detector to the membrane suppressor and to place the second electrode in the regenerant compartment of the membrane suppressor. The method embodiment of the invention for anion analysis includes the steps of: (a) separating anions of interest by capillary electrophoresis in a buffer solution; (b) exchanging cations of the buffer for regenerant cations using an ion chromatography membrane suppressor to reduce the electrical conductivity of the buffer to produce a suppressed buffer; and (c) measuring the electrical conductivity of the suppressed buffer to determine the separated anions. Similarly, the method embodiment of the invention for cation analysis includes the steps of: (a) separating cations of interest by capillary electrophoresis in a buffer solution; (b) exchanging anions of the buffer for regenerant anions using a stationary means for exchanging anions thereby reducing the electrical conductivity of the buffer to produce a suppressed buffer; and (c) measuring the electrical conductivity of the suppressed buffer to determine the separated cations.
摘要翻译：改进的毛细管电泳装置通常包括毛细管，毛细管具有样品入口端和出口端，与毛细管的入口端电连通的第一电极，与第一电极电连通的第二电极毛细管的出口端和与第一和第二电极电连通的高压电源。改进之处是将微型离子色谱膜抑制器连接到毛细管的出口端，将电导率检测器连接到膜抑制器上，并将第二电极放置在膜抑制器的再生室中。用于阴离子分析的本发明的方法实施方案包括以下步骤：（a）通过毛细管电泳在缓冲溶液中分离感兴趣的阴离子; （b）使用离子色谱膜抑制剂交换用于再生阳离子的缓冲液的阳离子，以降低缓冲液的电导率以产生抑制缓冲液; 和（c）测量抑制缓冲液的电导率以确定分离的阴离子。类似地，用于阳离子分析的本发明的方法实施例包括以下步骤：（a）通过毛细管电泳在缓冲溶液中分离目标阳离子; （b）使用用于交换阴离子的固定装置交换用于再生阴离子的缓冲液的阴离子，从而降低缓冲液的电导率以产生抑制缓冲液; 和（c）测量抑制缓冲液的电导率以确定分离的阳离子。

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