The transepithelial electrical potential difference across the isolated midgut of Bombyx mori larvae is dependent on the presence of potassium and is unaffected by the addition of hexoses to perfusion media, whereas it is enhanced by alanine, aspartic acid, glutamic acid and the corresponding 2oxoacids, glutamine and malate. The midgut enzyme profile indicates that the substrates for the tricar...

The genus BaciUus is one of the few remaining important groups of bacteria for which a route of terminal oxidation has not been shown. In studies (Gary et al., 1954) on the effect of nutrition on metabolic patterns in Bacilus subtilis, it was suggested that cells grown in a glucose mineral salts medium probably possefs the enzymatic mechanisms of the tricarboxylic acid cycle. Hardwick and Foste...

Excised green leaves of mung bean (Phaseolus aureus L. var. Mungo) were used to determine the effect of light on the rate of endogenous respiration via the tricarboxylic acid cycle. Illumination with white light at an intensity of 0.043 gram calories cm(-2)min(-1) (approximately 8600 lux) of visible radiation (400-700 nm) gave a rate of apparent photosynthesis, measured as net CO(2) uptake, of ...