Assisted living nurse competencies.

The Assisted Living (AL) nurse competencies article identifies the application of Benner's theoretical framework (novice to expert) and a sample structure for several key domains of nursing practice knowledge from the AL Nursing: A Manual for Management and Practice. On behalf of the American Assisted Living Nurse Association (AALNA), the co-authors seek feedback on the proposed structure for identifying important nurse competencies for the Assisted Living nurse community/facility leader.

Basic aspects of food preservation by hurdle technology.

Hurdle technology is used in industrialized as well as in developing countries for the gentle but effective preservation of foods. Previously hurdle technology, i.e.

Mutagenicity and effects of ochratoxin A on the frequency of sister chromatid exchange after metabolic activation.

Primary cultures of hepatocytes derived from untreated rats were incubated in the presence of ochratoxin A for 24 h. Five different strains of histidine auxotroph Salmonella typhimurium were exposed to conditioned cell culture medium before being tested for mutagenicity. A clear hepatocyte-mediated mutagenic response was observed in TA1535, TA1538 and TA100.

Two Penicillium camembertii mutants affected in the production of cyclopiazonic acid.

Penicillium camembertii was mutated and screened for cyclopiazonic acid-negative mutants. With a simple and rapid mini-extraction method for detection of cyclopiazonic acid production, we were able to isolate two strains which were affected in the production of this metabolite. One strain had completely lost the ability to synthesize detectable amounts of this secondary metabolite, whereas the other mutant produced 50 to 100 times less cyclopiazonic acid than the wild type.