Galactose appears to be the physiological inducer of the chromosomal lac operon in Klebsiella aerogenes. Both lactose and galactose are poor inducers in strains having a functional galactose catabolism (gal) operon, but both are excellent inducers in gal mutants. Thus the slow growth of K. aerogenes on lactose reflects the rapid degradation of the inducer. Several pts mutations were characteriz...

It is widely assumed that the integration of orientation contrast across spatial gaps within the long-range regime is not selective to the contrast sign of the individual stimuli. Probabilistic models of perceptual integration, however, suggest that long-range spatial integration should be, if not selective, at least sensitive to local contrast signs. To clarify this issue, we tested prediction...

In the optic flow illusion, the focus of an expanding optic flow field appears shifted when uniform flow is transparently superimposed. The shift is in the direction of the uniform flow, or "inducer." Current explanations relate the transformation of the expanding optic flow field to perceptual subtraction of the inducer signal. Alternatively, the shift might result from motion capture acting o...

The tip clearance, a compact gap between the inducer blade and casing wall, is critical to both liquid leakage cavitation-induced forces of turbopump. In this study, we numerically investigate effect clearance on cavitation characteristics an inducer. Six different clearances, 0.1, 0.3, 0.5, 1.0, 1.5, 2 mm, namely Models A–F, were designed evaluate performance, cavity structure, loading, radial...

Paraquat (1,1_-dimethyl-4,4_-bipyridinium dichloride), is a foliar-applied and non selective bipyridinium herbicides, and it is one of the most widely used herbicides in the world, controlling weeds in a huge variety of crops like corn, rice, soybean, wheat, potatoes; major fruits: apples, oranges, bananas; beverages: coffee, tea, cocoa; and processed crops: cotton, oil palm, sugarcane and rubber.

ebg enzyme, the second beta-galactosidase of Escherichia coli, does not normally convert lactose into an inducer of the lac operon. We previously reported the existence of a mutant ebg enzyme that does make such an inducer in vivo (Rolseth et al., J. Bacteriol. 142:1036-1039, 1980). Here I report that the mutant enzyme makes inducer from lactose in vitro and that the inducer is allolactose. Al...