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Organochlorine pesticides (OC) and polychlorinated biphenyls (PCBs) were measured in samples of breast milk taken from 92 donors representative of regional populations in southern Kazakstan. The World Health Organization protocol for assessing levels of chlorinated contaminants in breast milk was followed. The most prevalent OC residues were(More)
To assess levels of chlorinated contaminants in breast milk, we measured organochlorine pesticides, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) in breast milk samples collected in 1994 according to the World Health Organization protocol from 92 donors that were representative of regional(More)
An aspect of the regulation of early adenovirus gene expression has been studied by measuring the rates of transcription of several viral transcription units during infection by wild-type (WT) adenovirus type 5 and a temperature-sensitive mutant, H5ts125. It has previously been shown that two transcription units (regions 2 and 4) are subject to negative(More)
We have characterized the spectrum of PCB contaminants in human milk samples from 95 women in Kazakhstan using GC/MS congener specific analysis. In these samples, 12 PCBs comprised 83% of total PCB concentration, and were similar to the major PCBs reported in other published human milk studies. By summing concentration levels of 80 PCB congeners in the(More)
Lie derivatives are widely used in mathematics and physics. They are usually computed symbolically using computer algebra software. This symbolic computation might fail for very complicated expressions. Moreover, symbolic differentiation becomes more difficult if the function to be differentiated is not described explicitly as a function but by an(More)
We discuss both the theoretical framework and implementation issues for the simulation of holonomic mechanical systems using automatic differentiation. Our approach allows the direct simulation of such systems based on its Lagrangian. The Lagrangian may be given as explicit equations or as an algorithm containing control structures such as loops. The method(More)
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