摘要:
A method of sample displacement chromatography separation which comprises applying a multicomponent sample to one end of a chromatography bed comprising stationary phase material having affinity for components of the sample, causing components of the sample to become distributed along the chromatography bed by passage over the bed of a non-eluting mobile solvent phase, and recovering a desired component of the sample from at lest a portion of the chromatography bed, in which the sample components are applied to the chromatography bed in a non-homogeneous manner such that the concentration of at least one component with relatively low affinity for the stationary phase material is enhanced during an earlier part of sample application and/or the concentration of at least one component with relatively high affinity for the stationary phase material is enhanced during a later part of sample application.
摘要:
Dipeptide compounds are disclosed, the two peptide chains being joined together at a C.alpha.-atom of a non-terminal amino acid by a divalent bridging group --A--. The C.alpha.-atoms joined to group --A-- are located in equivalent positions in each peptide and each lack their native .alpha.-side chain. The bridged dipeptide compounds disclosed have a stimulating activity on cell division, especially for myelopoietic and bone marrow cells.
摘要:
Sample displacement chromatography is performed at low operating pressures (less than 30 bar) and/or at high sample loading (in excess of 500 mg/cm2 column area), with product recovery being effected in a non-gradient manner. The low operating pressures permit the use of simple and inexpensive apparatus. Non-gradient product recovery allows the desired product to be allowed in solutions with advantageously high concentration. Materials which may be purified include pharmaceuticals, pharmaceutical excipients, fine chemicals, biochemicals, X-ray contrast agents, chelating agents, peptides, proteins, oligonucleotides and vaccines. Apparatus embodiments include sample displacement chromatography apparatus comprising one or more ion exchange columns in direct combination with one or more desalting columns, and multicolumn chromatography apparatus permitting switching between a series separation mode and a parallel extraction mode.
摘要翻译:在低操作压力(小于30巴)和/或高样品负载(超过500mg / cm 2柱面积)下进行样品置换色谱,产物回收以非梯度方式进行。 低操作压力允许使用简单且便宜的装置。 非梯度产物回收使得所需产物在有利地高浓度的溶液中被允许。 可以纯化的材料包括药物,药物赋形剂,精细化学品,生物化学品,X射线造影剂,螯合剂,肽,蛋白质,寡核苷酸和疫苗。 装置实施方案包括样品置换色谱装置,其包括与一个或多个脱盐塔直接组合的一个或多个离子交换柱,以及允许在串联分离模式和并行提取模式之间切换的多色谱色谱装置。