Polycations reagent

It has been found that DTBP cross-linking substantially increased the salt stability of the complexes. The salt stabilization is reversed upon the addition of DTT, which cleaves the bifunctional reagent, indicating that it is not due to the conversion of the amines to amidines and is dependent upon the cross-linking. Similar results were achieved with other polycations, including poly(allylamine), and histone HI. 

Each polyion pair which yielded a stable membrane was removed from the receiving bath and treated. In general, quintuple washings with an excess (50 ml) of PBS were required to remove all traces of the polymeric reagents. The PBS also simulated the osmotic pressure which the capsule, and mammalian cells, would encounter in vivo. For several polyanion-polycation systems the membranes which were produced were not sufficiently strong to survive the rinsings. Leaky membranes and the complete collapse of the capsule were two common failures. 

Aging of hydroxyalumlnum polycation solutions used to prepare pillared clays affects the properties. Including surface area and cracking activity, of these pillared clays. The effects were correlated with the state of hydrolysis of the aged solutions. Dilution of the pillaring reagent, Chlorhydrol, causes depolymerlzatlon of polycations present In this reagent and the formation of new polycations which react to form the pillared clay. 

In the most dilute solutions, depolymerization is very rapid and, in some cases, the solutions rehydrolyze. The lower surface area PILCs formed from these solutions indicate that the polycations formed during rehydrolysis are different from the original polycations. In the most concentrated solutions, depolymerization was slow and less extensive. These solutions were also less favorable pillaring reagents. Thus, we find an optimum pillaring reagent exists at an intermediate dilution. This reagent can be... 

Methods were described for the incorporation of proteins in the form of noncovalent complexes with polycationic reagents, into sustained release systems where the polycation stabilizes the protein against inactivation while it resides in the delivery device, and retards release of the protein from the delivery device [469,470]. A variety of polycations have been used, including simple polyamino acids such as polylysine or polyarginine, protamine and chitosan. The end result was the release of the active agent with retention of biological activity, with a high cumulative field and over a sustained period of time. 

Yazynina et al. (1999) introduced novel reagents into the inhibition step with the goal of decreasing the long analysis times typically required for ELISA measurements. A polyanion-protein A conjugate was introduced into the atrazine antibody-enzyme conjugate solution. Antibody bound by protein A was in turn bound to the walls of a microplate coated with a polycation. This innovation reduced overall time of analysis to 40 min and achieved a detection limit of 0.03 ppb of atrazine. 

Bis(tridecyl) phthalate BRN 2023076 CCRIS 6197 Ditridecyl 1,2-benzenedicarboxylate Ditridecyl phthalate DTDP EINECS 204-294-3 HSDB 381 Jayfiex DTDP NuopIaz Phthalic acid, ditridecyl ester Polycizer 962-bpa Polycizer 962BPA PX-126 Staflex DTDP 1-Tridecanyl phthalate Truflex DTDP. Reagent grade plasticizer Liquid bp5 > 285° d = 0.951. Aristech Exxon. 

---