Enzymatic membrane method for the synthesis and separation of peptides
    1.
    发明授权
    Enzymatic membrane method for the synthesis and separation of peptides 失效
    用于合成和分离肽的酶膜法

    公开(公告)号:US5350681A

    公开(公告)日:1994-09-27

    申请号:US928673

    申请日:1992-08-12

    摘要: The present invention discloses a method for the enzymatic synthesis of a peptide. A protected peptide having a C-terminal carboxylate group or a protected, N-acyl amino acid having an alpha carboxylate group is reacted with a protected peptide having an N-terminal ammonium group or a protected amino acid having an alpha ammonium group in the presence of a condensation enzyme under conditions in which the carboxylate group and the ammonium group condense to form a protected, uncharged, peptide product. This peptide product is transported across a water-immiscible hydrophobic phase into an aqueous product phase and prevented from back diffusing across the water-immiscible hydrophobic phase. The peptide product can be converted, chemically or enzymatically, to a charged species that cannot back diffuse across the water-immiscible phase into the aqueous reaction phase. The water-immiscible hydrophobic phase is an ion rejection membrane separating the aqueous reaction phase from the product phase creating oil/water interfaces with each of the aqueous phases.

    摘要翻译: 本发明公开了一种肽合成酶的方法。 具有羧酸C端的保护肽或具有α羧酸酯基团的被保护的N-酰基氨基酸在存在下与具有N-末端铵基或被保护的氨基酸的受保护肽反应 的缩合酶在羧酸酯基和铵基团缩合形成受保护的不带电荷的肽产物的条件下反应。 该肽产物通过水不混溶的疏水相转运到水相产物相中并防止反向扩散穿过与水不混溶的疏水相。 肽产物可以化学或酶促转化成不能通过水不混溶相扩散到水反应相中的带电物质。 水不混溶的疏水相是将水反应相与产物相分离的离子排斥膜,产生与每个水相的油/水界面。

    Membrane extraction of citrus bittering agents
    3.
    发明授权
    Membrane extraction of citrus bittering agents 失效
    柑橘苦瓜的膜提取

    公开(公告)号:US5263409A

    公开(公告)日:1993-11-23

    申请号:US872602

    申请日:1992-04-24

    CPC分类号: B01D61/246 A23L2/74 B01D61/38

    摘要: There are disclosed two types of apparatus using membrane extractions of citrus juice bittering agents, both using extraction fluids. In one type, a membrane contactor facilitates contact between bittering agents present in a citrus juice feed and a hydrophobic bittering agents extraction fluid; a second membrane contactor may be used to extract bittering agents from the hydrophobic extraction fluid by use of a basic stripping fluid on the permeate side. In a second type, an immobilized liquid membrane containing hydrophobic extraction fluid supported within the pores of a microporous hydrophobic polymeric membrane is used to facilitate transport of bittering agents across the membrane.

    摘要翻译: 公开了使用提取液两种类型的使用柑橘汁苦味剂膜提取的装置。 在一种类型中,膜接触器促进存在于柑橘汁进料中的苦味剂和疏水性苦味剂提取液之间的接触; 可以使用第二膜接触器通过使用渗透侧上的碱性剥离液从疏水性萃取液中提取苦味剂。 在第二种类型中,使用包含疏水性提取流体的固定液膜,其支撑在微孔疏水性聚合物膜的孔内,以促进苦味剂穿过膜的输送。

    Enantiomeric resolution of
4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone
    8.
    发明授权
    Enantiomeric resolution of 4-(3,4-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone 失效
    4-(3,4-二氯苯基)-3,4-二氢-1(2H) - 萘酮的对映异构体拆分

    公开(公告)号:US5288916A

    公开(公告)日:1994-02-22

    申请号:US36809

    申请日:1993-03-25

    摘要: There is disclosed a method of separating enantiomers of 4-(3',4'-dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone comprising contacting the same with a homogeneous or nonhomogeneous liquid mixture of solvent and water, the mixture containing substantially pure and unsupported gamma-cyclodextrin or its derivatives. Also disclosed are methods of further enantiomerically enriching solid mixtures obtained from the enantiomer separation method and further extracting one enantiomer by solvent extraction of the solid mixtures obtained.

    摘要翻译: 公开了分离4-(3',4'-二氯苯基)-3,4-二氢-1(2H) - 萘酮的对映异构体的方法,其包括使其与溶剂和水的均匀或非均匀的液体混合物接触, 含有基本上纯的和未负载的γ-环糊精或其衍生物的混合物。 还公开了进一步对映异构体富集由对映异构体分离方法获得的固体混合物的方法,并通过所获得的固体混合物的溶剂萃取进一步提取一种对映体的方法。