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Biomass levels are expressed as grams of cell weight per milliliter of fermentation broth.
The concentration of the ground extract was adjusted by adding 80% methanol to be equivalent to 32 mg of initial wet weight per milliliter of methanol extract.
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PCB-sum concentrations were determined on a wet weight basis (nanograms per milliliter); subsequently these PCB concentrations were adjusted for lipids (nanograms per gram).
When raw data were provided, we used linear regression models to calculate estimates of change in birth weight per nanogram per milliliter of serum PFOA.
The summary β coefficients for grams birth weight per nanograms per milliliter increase in PFOA and PFOS levels were –14.7 g (95% CI: –21.7, –7.8) and –5.0 g (95% CI: –8.9, –1.1), respectively.
Surgery-induced weight loss was associated with a gradual and significant increase in the serum concentrations of POPs measured in obese patients whether expressed on a lipid weight basis or per milliliter of serum.
In a meta-regression analysis of the epidemiologic data in Figure 3 that we conducted (not shown), week of blood draw was associated with a larger negative coefficient for PFOS (–0.39 g birth weight per nanograms per milliliter increase in PFOS per gestational week, p < 0.01).
Specimens were serially diluted and cultured at 37°C aerobically on TSB (for Gram-negative and Gram-positive bacteria) and MacConkey agar (for Gram-negative bacteria) to obtain quantitative bacterial counts standardized per gram of organ weight or CFU per milliliter of peritoneal lavage fluid.
Wet-weight concentrations (nanograms per milliliter) were determined at the Department of Toxic Organic Pollutants at the Slovak Medical University in Bratislava.
Contaminant concentrations are expressed as wet-weight concentrations (nanograms per milliliter) and in nanograms per gram lipid for descriptive analyses.
Otherwise, wet-weight concentrations (nanograms per milliliter) were used for individual PCB congeners, HCB, and p,p´-DDE.
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