| 摘要 |
2031531 9014201 PCTABS00002 A gel casting method and apparatus are used to cause a pre-gelled liquid mixture to gel sequentially in a given travelling direction, allowing still liquid material (27) to flow to the gelling front (29), replacing volumes lost due to shrinkage during the change of state from a liquid (27) to a gel (37). The differential gelling method provides stress-free gels free of voids common to highly stressed gels, and the method is applicable to column and slab gels, and particularly to capillary columns and very thin slab gels.
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