Reproducibility of frequency-dependent low frequency fluctuations in reaction time over time and across tasks.

Objective: Increased levels of reaction time variability (RTV) are characteristics of sustained attention deficits. The clinical significance of RTV has been widely recognized. However, the reliability of RTV measurements has not been widely studied.

[Heterogenous expression of nitrile hydratase gene of Nocardia sp. in recombinant Pichia pastoris].

Heterogenous expression of active nitrile hydratase (NHase) was focused for its great potential in genetically evolution of the operational stability of NHase. Two recombinant Escherichia coli strains, E. coli JM105 (pUC18-NHBAX) and E.