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    • 5. 发明申请
    • METHOD AND SILICATE COMPOSITION FOR CONDITIONING SILICA SURFACES
    • 用于调节二氧化硅表面的方法和硅酸盐组合物
    • WO1997003351A1
    • 1997-01-30
    • PCT/US1996011400
    • 1996-07-10
    • THE PERKIN-ELMER CORPORATIONDEMOREST, David, M.MORING, Stephen, E.CHIESA, Claudia
    • THE PERKIN-ELMER CORPORATION
    • G01N27/447
    • G01N27/44752G01N30/6052G01N2030/285
    • Disclosed is a method for increasing the electroosmotic flow rate available for a silica surface. In the method, there is provided an electrophoretic channel which is defined by one or more silica surfaces. The surface(s) are contacted with an alkaline aqueous solution containing a solubilized silicate-monovalent metal complex in an amount effective to increase the acidity of the silica surfaces(s), as evidenced by a reduction in the average bulk pKa of the surface(s). The achieved increase in acidity is greater than would be obtained using an otherwise identical solution lacking said silicate. In one preferred embodiment, the monovalent metal used in the solution is Li , Na , or K . Also disclosed is a method for increasing the acidity of a silica surface, by contacting the surface with an alkaline aqueous solution of the type noted above.
    • 公开了一种增加可用于二氧化硅表面的电渗流速的方法。 在该方法中,提供了由一个或多个二氧化硅表面限定的电泳通道。 表面与含有溶解的硅酸盐 - 一价金属络合物的碱性水溶液以有效增加二氧化硅表面的酸度的量​​接触,这通过表面的平均体积pKa的降低来证明( S)。 实现的酸度增加大于使用其它相同的不含所述硅酸盐的溶液所获得的增加。 在一个优选实施方案中,溶液中使用的一价金属是Li +,Na +或K +。 还公开了通过使表面与上述类型的碱性水溶液接触来提高二氧化硅表面的酸度的方法。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR REDUCING THE DISTORTION OF A SAMPLE ZONE ELUTING FROM A CAPILLARY ELECTROPHORESIS CAPILLARY
    • 用于减少毛细管电泳毛细血管样品区域失调的方法和装置
    • WO1998026280A1
    • 1998-06-18
    • PCT/US1997020199
    • 1997-11-11
    • THE PERKIN-ELMER CORPORATION
    • THE PERKIN-ELMER CORPORATIONNORDMAN, Eric, S.
    • G01N27/447
    • G01N27/44717
    • An electrophoresis system including means for reducing the distortion of a sample zone eluting from a capillary electrophoresis separation capillary is disclosed. The system includes one or more separation capillaries, each separation capillary having an inlet end and an outlet end; a first electrode in electrical communication with the inlet ends of the separation capillaries; a second electrode in electrical communication with the outlet ends of the separation capillaries; and one or more focusing electrodes in electrical communication with the outlet ends of the separation capillaries. In operation, the voltage of each of the electrodes is adjusted such that (i) the sample zone is transported from the inlet end to the outlet end of the separation capillaries and (ii) the distortion of the sample zone eluting from the separation capillaries is reduced.
    • 公开了一种包括用于减少从毛细管电泳分离毛细管洗脱的样品区变形的装置的电泳系统。 该系统包括一个或多个分离毛细管,每个分离毛细管具有入口端和出口端; 与分离毛细管的入口端电连通的第一电极; 与分离毛细管的出口端电连通的第二电极; 以及一个或多个聚焦电极与分离毛细管的出口端电连通。 在操作中,调节每个电极的电压,使得(i)样品区域从分离毛细管的入口端输出到出口端,和(ii)从分离毛​​细管洗脱的样品区域的变形是 降低。
    • 8. 发明申请
    • PRIMER EXTENSION REACTION UTILIZING A COSUBSTRATE-ENZYME PAIR FOR CONSUMING PYROPHOSPHATE
    • 用于消耗磷酸氢盐的组合物酶的初步扩展反应
    • WO1998015655A1
    • 1998-04-16
    • PCT/US1997017301
    • 1997-09-26
    • THE PERKIN-ELMER CORPORATION
    • THE PERKIN-ELMER CORPORATIONCHEN, Shiaw-Min
    • C12Q01/68
    • C12Q1/6848C12Q1/6869C12Q2565/301C12Q2527/127
    • An improved method for performing a primer extension reaction is disclosed, such method including the steps of annealing an oligonucleotide primer to a portion of a template nucleic acid thereby forming a primer-template hybrid; adding primer-extension reagents to the primer-template hybrid for extending the primer; and adding a cosubstrate-enzyme pair to the primer-template hybrid for conducting a pyrophosphate-utilizing reaction, thereby reducing the amount of pyrophosphate present in the reaction. In a particularly preferred embodiment, the cosubstrate-enzyme pair comprises pyrophosphate dependent phosphofructose kinase and fructose-6-phosphate, or UDP glucose pyrophosphorylase and UDP glucose. The invention further includes kits and solutions useful for carrying out the methods of the invention.
    • 公开了改进的引物延伸反应的方法,该方法包括以下步骤:将寡核苷酸引物退火至模板核酸的一部分,从而形成引物 - 模板杂交体; 向引物 - 模板杂交体中加入引物延伸试剂以延伸引物; 并向引物 - 模板杂交体添加一个辅助 - 酶对以进行焦磷酸盐利用反应,从而减少反应中存在的焦磷酸盐的量。 在一个特别优选的实施方案中,同位素 - 酶对包含焦磷酸依赖性磷酸果糖激酶和果糖-6-磷酸,或UDP葡萄糖焦磷酸化酶和UDP葡萄糖。 本发明还包括用于实施本发明方法的试剂盒和溶液。
    • 9. 发明申请
    • 4,7-DICHLORORHODAMINE DYES
    • 4,7-二氯丹染色体
    • WO1997049769A1
    • 1997-12-31
    • PCT/US1997008797
    • 1997-05-21
    • THE PERKIN-ELMER CORPORATION
    • THE PERKIN-ELMER CORPORATIONLEE, LindaBENSON, Scott, C.ROSENBLUM, Barnett, B.SPUNGEON, Sandra, L.
    • C09B11/24
    • C07H21/00C09B11/24
    • A class of 4,7-dichlororhodamine compounds useful as fluorescent dyes are disclosed having structure formula (I) wherein R1-R6 are hydrogen, fluorine, chlorine, lower alkyl, lower alkene, lower alkyne, sulfonate, sulfone, amino, amido, nitrile, lower alkoxy, linking group, or combinations thereof, or, when taken together, R1 and R6 is benzo, or, when taken together, R4 and R5 is benzo; Y1-Y4 are hydrogen or lower alkyl, or, when taken together, Y1 and R2 is propano and Y2 and R1 is propano, or, when taken together, Y3 and R3 is propano and Y4 and R4 is propano; and X1-X3 taken separately are selected from the group consisting of hydrogen, chlorine, fluorine, lower alkyl, carboxylate, sulfonic acid, -CH2OH, and a linking group. In another aspect, the invention includes reagents labeled with the 4,7-dichlororhodamine dye compounds, including deoxynucleotides, dideoxynucleotides, and polynucleotides. In an additional aspect, the invention includes methods utilizing such dye compounds and reagents including dideoxy polynucleotide sequencing and fragment analysis methods.
    • 公开了一类用作荧光染料的4,7-二氯罗丹明化合物,其具有结构式(I),其中R 1 -R 6是氢,氟,氯,低级烷基,低级烯,低级炔,磺酸酯,砜,氨基,酰氨基,腈 ,低级烷氧基,连接基团或它们的组合,或者当R 1和R 6一起时为苯并,或者合并时,R 4和R 5为苯并; Y1-Y4为氢或低级烷基,当Y1和R2为丙酰基时,Y 1和R 2为丙酰基,或者当Y 3和R 3为丙酰基时,Y 4和R 4为丙酰基; 和分别选择的X1-X3选自氢,氯,氟,低级烷基,羧酸酯,磺酸,-CH 2 OH和连接基团。 另一方面,本发明包括用4,7-二氯罗丹明染料化合物标记的试剂,包括脱氧核苷酸,双脱氧核苷酸和多核苷酸。 在另一方面,本发明包括利用这种染料化合物的方法和包括双脱氧多核苷酸测序和片段分析方法的试剂。