In subprimates, a single form of tyrosine hydroxylase (TH) is expressed, whereas two TH protein isoforms have been identified in monkeys and four isoforms have been demonstrated in humans. In order to establish the evolutionary pattern/emergence of these multiple TH isoforms, adrenal medullae from different mammalian species were analyzed by blot immunolabeling using pan-specific TH antibodies ...

In 1973, Parikh proved a speed-up theorem conjectured by Gödel 37 years before: there exist arithmetical formulæ that are provable in first order arithmetic, but whose shorter proof in second order arithmetic is arbitrarily smaller than any proof in first order. On the other hand, resolution for higher order logic can be simulated step by step in a first order narrowing and resolution method ba...