Masanori Itai

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We searched for a new cell aggregation factor for hepatoma AH109A cells, and found one we called HAF in the culture filtrate of Streptomyces sp. strain No. A-6143 isolated from a soil sample. HAF was purified by salting-out with ammonium sulfate. DEAE-cellulose column chromatography, gel filtration on Sephadex G-100, and hydroxylapatite column(More)
B. Zil’ber introduced the notion of quasi-minimality; Definition 1.1 An uncountable first-order structure M is called quasi-minimal, if for any definable (allowing parameters) subset X of M either X or M −X is finite or countable. Zil’ber conjectures that Cexp = (C,+, · , exp, 1, 0) is quasi-minimal. This conjecture is still open. Inspired by this(More)
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