Population dynamics of Aeromonas spp. in an urban river watershed.

Density of Aeromonas spp. at one site in the Buffalo River and at four sites on its upstream tributaries was followed from June 1992-June 1993. Membrane filtration counts of Aeromonas during the summer ranged between 18 and 4000 ml-1, which were one to two logs higher than faecal coliform and faecal streptococci densities.

Disposition and metabolism of 2,3,7,8-tetrachlorodibenzofuran by channel catfish (Ictalurus punctatus).

The disposition and metabolism of 2,3,7,8-tetrachlorodibenzofuran (TCDF) was was investigated in channel catfish (Ictalurus punctatus) in order to better understand the metabolic and physiological factors that modulate the fate of this extremely toxic compound in channel catfish compared to other species. The fish were dosed orally with [3H]TCDF (1 microgram/kg); tissue were harvested at 3, 7, and 14 days for radioassay. The body burden of TCDF equivalents in catfish at 3 days was 0.

Disposition and metabolism of 2,3,7,8-tetrachlorodibenzofuran by rainbow trout (Oncorhynchus mykiss).

The disposition and metabolism of 2,3,7,8-tetrachlorodibenzofuran (TCDF) was investigated in rainbow trout (Oncorhynchus mykiss) in order to better understand the metabolic and physiological factors that modulate the fate of this extremely toxic compound in rainbow trout compared to other species. The fish were dosed orally with [3H]TCDF (1 microgram/kg); fish were terminated at 1-19 days for the determination of whole body half-life or at 0.3-28 days for determination of tissue distribution.

Restrained eating among adolescents: dieters are not always bingers and bingers are not always dieters.

This study examined individual differences in the relationships among 3 constructs relevant to restrained eating theory-cognitive restraint (dieting), disinhibition (binging), and hunger. Participants were 421 adolescents (158 male, 255 female, and 8 not indicated). Comparisons among subgroups based on scores on the 3 constructs indicated that there were (a) 2 types of frequent dieters-those who follow theoretical predictions and become disinhibited and those who maintain their restraint; (b) 2 types of bingers-those who engage in dieting-induced binging and those who are hungry and disinhibited; and (c) 2 types of low-hunger eaters-those who suppress their hunger and those who eat before they experience much hunger.

Metabolism of 2-acetylaminofluorene by hepatocytes isolated from rainbow trout.

The metabolism of 2-acetyl-[9-14C]aminofluorene (AAF) by hepatocytes isolated from rainbow trout (Oncorhynchus mykiss), Shasta strain, was investigated in order to assess the competing activation and detoxification pathways which may explain the resistance of this species and strain to the initiation of carcinogenesis by this model carcinogenic aromatic amide. Freshly isolated hepatocytes (per milliliter: 1.0 mg dry wt; 1.