Polyacrylic amide , effect

Fig. 10. Effect of CsA on the folding of newly formed transferrin. (A) HepG2 cells were preincubated for 1 hr with ( + ) or without (-) 1 p,M CsA, pulse labeled at 23°C for 10 min, then chased for the indicated period at 23°C, all in the presence (+) or absence (-) of CsA. Transferrin immunoprecipitates were analyzed by nonreducing SDS-polyacryl-amide gel electrophoresis. The arrows denote the very slow-migrating transferrin that accumulates in the presence of CsA. (B) Quantification of the effect of 1 p.M CsA on transferrin maturation, as determined by densitometry of the gel in A. In the pulse-labeled samples 12-15% of transferrin migrated as the folded species. From Lodish and Kong (1991).

The suggested method will prevent or considerably slow down the speed of spreading of toxic products in the sea water. Polymer coatings based on polyacryl amide are nontoxic materials which are also highly resistant to adverse environmental effects. Each type of warfare agent requires the development of a specific polymer composition. 

The polyacrylate polymers and a derivative of a vinyl acetate maleic anhydride copolymer cause V30 to decrease monotonically with increasing polymer concentration, similar to the CMC polymers (Figure 46). The polymers PVA and poly(vinyl pyridinium) (PVP) hydrochloride markedly increased V30 at low concentration at concentrations above 1 g of polymer per gram of added bentonite PVA functions as a static fluid loss additive. The maximum in the API fluid loss at low PVA concentrations approximately coincides with the maximum in the yield stress and plastic viscosity found by Heath and Tadros (75). The increased static fluid loss is consistent with Heath and Tadros s conclusion that bentonite is flocculated by low concentrations of PVA. The concentration of PVA required to decrease V30 below that of the neat bentonite suspension is significantly larger than the concentration of CMC, where effective static fluid loss control can be achieved at polymer bentonite weight ratios of about 0.1 g/g. More effective fluid loss control has been achieved with other synthetic polymers such as poly(vinyl sulphonate)-poly(vinyl amide) copolymer (40) and other sulphonated polymers (39). 

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