Authors:J. Stan Morton, James Westmoreland, and April Rhineheart
Tritiated water is probably the most mobile manmade nuclide found in the environment. The low-energy beta decay produces few
health concerns except at extremely high concentrations of tritium. However, because of the ubiquitous nature of tritiated
water, when identified in the bionetwork, it can be viewed as a precursor of nuclides with greater health risks. For this
reason alone it becomes desirable to determine tritium concentrations many orders of magnitude below that considered a health
concern. A devise is described that eliminates the need for large water-filled chest freezers used as coolers. The enrichment
cells can be employed individually or in series.
Six isolates with phenol degrading ability were obtained from marine sediments by enrichment procedures and an isolate, AM4, was identified as Alcaligenes sp. by 16S rDNA sequencing. The Plackett-Burman design was applied to estimate the significance of culture medium components and conditions for phenol degradation by Alcaligenes sp. AM4. The resulting medium formula which was predicted to be near optimal was: phenol conc. (240 μg/ml), culture volume (37.5 ml), inoculum’s size (0.15 ml), NH4SO4 (0.5 g/l), K2HPO4 (0.75 g/l), KH2PO4 (0.75 g/l), MgSO4 (0.3 g/l) and NaCl (0.25 g/l). Scanning electron microscopy was applied to cells exposed to phenol, and a larger cell size was detected, resulting in a reduced cell surface. This relative reduction of the cell surface represents a cellular mechanism to reduce the toxic effect of this environmental stress factor.
the environment in which they grow. Growing of Agaricus bisporus on substrates enriched with Se at 0.6 mmol L −1 concentration resulted in 2.5 times increase in the amount of selenium in the fruiting bodies ( Rzymski et al., 2016 ). Likewise, the
Authors:K. Ianakiev, J. Goda, T. Hill, C. Moss, J. Ong, M. Paffett, R. Parker, and M. Swinhoe
We report our developments of the next generation of uranium enrichment monitoring technology for gas centrifuge enrichment
plants (GCEPs). The main challenge presented by current technology is the need for periodic replacement of the short half-life
(1.27 year) 109Cd transmission source. We report on a transmission source at the 22.1 keV K-edge of ruthenium based on an X-ray tube with
a “notch” filter. As part of the design we have modeled the NaI detector passive shielding with the MCNP code. Some preliminary
results from experiments and modeling will be presented.
Authors:B. Schäffer, B. Keller, Z. Szakály, and D. Lőrinczy
can be stated that inspite of quantitative and qualitative change of foods consumed, the dietary Ca:P ratio remained the same [ 3 ]. The ratio in both years was 1:2.
One of the possibilities to improve the dietary Ca:P ratio is to enrich the
): Detection of pathogenic Yersinia enterocolitica in enrichment media and pork by a multiplex PCR: a study of sample preparation and PCR-inhibitory components. Int. J. Fd Microbiol. , 4 , 93-105.
Detection of pathogenic Yersinia