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Boronic Acid Matrices for the Affinity Purification of Glycoproteins and Enzymes,Boronic acids immobilized on insoluble matrices have been used for over a decade to purify proteins and enzymes (.,.). Boronic acid matrices have been used to purify:

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Extensions of Embeddings in the Computably Enumerable DegreesIn this paper, we study the extensions of embeddings in the computably enumerable Turing degrees. We show that for any c.e. degrees ., if either . is low or . is high, then there is a c.e. degree . such that both .. and . hold.

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VERT

Definable Filters in the Structure of Bounded Turing ReductionsIn this article, we show that there exist c.e. bounded Turing degrees ., . such that ..., and that for any c.e. bounded Turing degree ., . if and only if .. The result gives an unexpected definability theorem in the structure of bounded Turing reducibilities.

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注意力集中

Searching Trees: An EssayWe are reviewing recent advances in the run time analysis of search tree algorithms, including indications to open problems. In doing so, we also try to cover the historical dimensions of this topic.

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