The possibility of using glycerol and glycerol-containing waste from biodiesel manufacture as a carbon and energy source for microbiological production of citric acid has been studied. Acid formation on the selective media had previously been tested in 66 yeast strains of different genera (Candida, Pichia, Saccharomyces, Torulopsis and Yarrowia). Under growth limitation by nitrogen, 41 strains ...

The purpose of this study was to assess the relationship between peripheral muscle responses (motor evoked potentials, MEP) evoked by transcranial magnetic stimulation (TMS) and the early components of the TMS-evoked EEG response, both of which reflect cortical excitability. Left primary motor cortex of five healthy volunteers was stimulated with 100% of the motor threshold. The relationship be...

Important progress in our knowledge concerning the biological precursors of hemin was made when Bloch and Rittenberg (1) presented evidence that significant amounts of deuterium are incorporated into the hemin of rats fed deuterioacetic acid. Further advances in this field were made by Shemin and Rittenberg (2-4), who showed that glycine labeled with N15 is utilized as a nitrogenous precursor o...

Stokes and Gunness (1) and Lyman et al. (2) found that the amino acid requirements of Lactobacillus arabinosus vary with the composition of the basal medium. Lyman et al. (2) showed that the organism could synthesize arginine if grown in the presence of pyridoxamine and carbon dioxide. Hood and Lyman (3) observed that increased amounts of glutamic acid were necessary for rapid growth in the abs...

In an earlier report (1) an experiment was described in which a test dose of glycine-N15 was fed to a gouty subject and the abundance of N'5 in uric acid as well as in other urinary constituents was measured for several days. It was found that three times as much of the administered N15 could be recovered in urinary uric acid in the gouty subject as in the two normal subjects studied. The gouty...

Temperate bacteriophages with plasmid prophages are uncommon in nature, and of these only phages N15 and PY54 are known to have a linear plasmid prophage with closed hairpin telomeres. We report here the complete nucleotide sequence of the 51,601-bp Klebsiella oxytoca linear plasmid pKO2, and we demonstrate experimentally that it is also a prophage. We call this bacteriophage phiKO2. An analysi...

Background: Spatially correlated overabundances of N15 and O18 observed in some low-density graphite meteoritic grains have been connected to nucleosynthesis taking place the helium-burning shell during core-collapse supernovae. Two reactions which identified as important final abundances are F18(n,?)N15 F18(n,p)O18. The relative strengths F18(n,p)O18 depend sensitively on ?0 p0 decay branches ...