Evaluation of a commercially available beneficial insect habitat for management of lepidoptera pests.

A field study was conducted in 2003 and 2004 at the Center for Environmental Farming Systems in Goldsboro, NC, to evaluate the effectiveness of a commercially available beneficial insect habitat in decreasing pest caterpillar populations in organically managed tomato, Lycopersicon esculentum Mill., plots. Six pairs of tomato plots were established and a commercial beneficial insect habitat seed mix (Peaceful Valley's Good Bug Blend) transplanted around the perimeter of treatment plots, whereas a brown-top millet, Brachiaria ramose (L.

Effect of lindane on nitroreductase and dechlorinase enzyme activity in the gastrointestinal tract.

A previously reported acceleration of parathion metabolism in the gastrointestinal (GI) tract of lindane-pretreated rats could have been due to either a prolonged residence time of parathion or increased GI nitroreductase activity or both. Thus to determine the effect on GI nitroreductase and dechlorinase activity, 20 mg/kg lindane or 535 mg/kg neomycin were administered daily, by gavage, to weanling F-344 rats. Enzyme activity in the small intestine and cecum were assayed after 2 weeks and 5 weeks of treatment.

Home air nicotine levels and urinary cotinine excretion in preschool children.

We examined the extent of correlation between home air nicotine levels and urine cotinine/creatinine ratios (CCR) in 27 children who attended a research day care program where they were not exposed to environmental tobacco smoke (ETS) during the daytime hours. Average concentrations of nicotine in home air were determined by active air sampling during the evening and night hours on 2 consecutive days. Urine samples for cotinine and creatinine determinations were collected before, during, and after the two sampling periods.

Neurofibromatosis 2: clinical and DNA linkage studies of a large kindred.

At least eight provisional categories of neurofibromatosis have been proposed. Among these, neurofibromatosis 1 (von Recklinghausen's disease or peripheral neurofibromatosis) and neurofibromatosis 2 (central or bilateral acoustic neurofibromatosis) have been established as distinct disorders. We studied 15 affected male and 8 affected female members of one large kindred with neurofibromatosis 2.

Angiomas and von Recklinghausen neurofibromatosis.

The notion that vascular alterations represent a major feature of the pathogenesis of neurofibromatosis (NF) has been supported by an increasing number of observations. We present data about skin Morgan angiomas in the general US white population and a cohort of patients with NF-1 and their unaffected relatives. Among patients with NF-1, angiomas were significantly more common, but not so among unaffected relatives.