Sleep patterns among children with attention-deficit hyperactivity disorder: a reexamination of parent perceptions.

Surveyed parents of children with and without ADHD for their perceptions of their children's sleep patterns. All children had been referred for learning or behavior problems to an outpatient assessment center. Diagnoses of ADHD were based on DSM-III-R, rather than DSM-III criteria, avoiding a possible confound from diagnostic criteria that formerly included sleep disturbance as a defining characteristic of ADHD. Data replicated past findings showing that parents perceive children with ADHD to have greater sleep difficulty than normally developing children. Parents perceived few differences between sleep patterns of children with ADHD who were taking or not taking stimulant medication. Implications of these findings are discussed in the context of past literature and present clinical practice.

Elemental content of vegetables and millet grown in potted soil amended with lignite fly ash.

Vegetables and millet were grown to maturity in potted soil amended with 10% (by weight) of lignite fly ash. Analysis of the ash, soil, and crops for 40 elements showed Al, As, B, Mg, Mo, Rb, and Se to be absorbed at higher levels by the ash-grown plants than the controls in most instances. Selenium was of most concern, because of its toxicity and degree of plant uptake.

Toxaphene residues in the bovine after oral exposure.

Toxaphene was administered orally to 19 mixed-breed heifers at levels of 50, 100, or 150 mg/kg. Thirteen of 19 died with deaths in all 3 dosage levels. Liver, kidney, and brain samples were collected and analyzed for toxaphene residues by GLC. Liver residues varied logarithmically with dosage from 1.2 to 38 ppm, kidney residues were from 0.8 to 12 ppm, and brain residues were from 0.3 to 7.0 ppm. No detectable amounts of toxaphene (< 0.1 ppm) were observed in tissues collected from 2 control calves which received no toxaphene.

Element and polychlorinated biphenyl deposition and effects in sheep fed cabbage grown on municipal sewage sludge.

Sheep were fed a diet containing 30 per cent (dry weight) cabbage which had been grown on municipal sewage sludge from Syracuse, NY for 77 days. Slight increases were found in the concnetration of nickel in kidney, copper in liver and cadmium in certain animal organs as compared to those in sheep fed a control ration containing cabbage grown on soil. Polychlorinated biphenyls were also found at higher levels in the sludge-grown cabbage and in the livers of the respectively fed sheep as compared to controls. An increase in liver weight, proliferation of hepatic smooth endoplasmic reticulum and various degenerative changes were noted in the livers of the sheep fed the sludge-grown cabbage ration as compared to the controls.

Lead and other elements in tissues of guinea pigs fed crown vetch grown adjacent to a highway.

Forty-four elements were determined in crown vetch sampled along a heavily travelled highway in Virginia. Twenty-four elements including Ba, Br, Cr, Pb, Sn, and Sr were higher in this vegetation than in control vetch. When the highway-grown vetch was fed as 45% (dry weight) of the diet to guinea pigs for 100 days, Ba, Br, Cr, Pb, Sn and Sr were found at higher concentrations in the various animal tissues than in those of guinea pigs similarly fed the control crown vetch.