Radiation-induced radical formation in beta-glycerophosphate single crystals studied by electron paramagnetic resonance and electron nuclear double resonance spectroscopy: formation of an allylic-type radical

The purpose of this study was to better understand students' perceptions of and preferences for inclusion or pull-out service delivery models. Thirty-two students with and without learning disabilities who had participated in both models during the past 2 or 3 years were interviewed individually. Key questions assessed their perceptions of which model was most conducive to academic learning and which was most likely to yield social benefits, and the reasons for their beliefs. Results indicated that students' views varied. Overall, more children identified pull-out as the model of choice, but many children were confident that inclusion was meeting their academic and social needs. We interpret the results of this study as providing support for maintaining a continuum of service delivery options and for considering the placement of each child individually, based on his or her unique needs.     

An outbreak of foodborne illness caused by Escherichia coli O39:NM, an agent not fitting into the existing scheme for classifying diarrheogenic E. coli

An outbreak of gastrointestinal illness with clinical and epidemiologic features of enterotoxigenic Escherichia coli (ETEC) occurred among patrons of a restaurant during April 1991. Illnesses among several groups of patrons were characterized by diarrhea (100%) and cramps (79%-88%) lasting a median of 3-5 days. Median incubation periods ranged from 50 to 56 h. A nonmotile strain of E. coli (E. coli O39), which was negative for heat-labile (LT) and heat-stable (STa, STb) ETEC toxins, was isolated only from ill patrons. This organism produced enteroaggregative E. coli heat-stable enterotoxin 1 and contained the enteropathogenic E. coli gene locus for enterocyte effacement; it did not display mannose-resistant adherence, but produced attaching and effacing lesions in the absence of mannose on cultured HEp-2 cells. E. coli that are not part of highly characterized but narrowly defined groups may be important causes of foodborne illness.