Polyethylene glycol surface coating

Fused silica capillary columns of various internal bores and of lengths in the range 25 to 50 m are mainly employed for analytical separations. A variety of polar and non-polar column types are available including those open tubular types with simple wall coatings (WCOT), those with coatings dispersed on porous solid-supports to increase adsorbent surface area (SCOT) and porous layer open tubular (PLOT) columns. Important stationary phases include polyethylene glycol, dimethylpolysiloxane and different siloxane copolymers. Various sample introduction procedures are employed including ... 

The OFRR interior surface is then coated with various polymers, such as moderately polar methyl phenyl polysiloxane (OV-17) or highly polar polyethylene glycol (PEG), for the detection of different types of chemical vapors. The coating procedures are adapted from well-developed static coating procedures for GC... 

The stabilizing of aqueous latexes succeeded by using emulsifiers (anionic, nonionic) and/or their mixture, steric stabilizators (polyvinyl alcohol (PVOH), hydroxyethyl cellulose, polyethylene glycol, new protective colloids etc.), and polymerizable surfaces active agents, in general. Vinyl acetate (VAc) emulsion homopolymers and copolymers (latexes) are widely used as binders in water-based interior and exterior architectural paints, coatings, and adhesives, since they have higher mechanical and water resistance properties than the homopolymers of both monomers [2, 4, 7]. 

Polyethylene glycols are well known as protein-compatible molecules when coated or grafted onto surfaces. Both protein and platelet adsorptions to polyethylene glycol (PEG)-modified surfaces were shown to be reduced by PEG chains when attached to surfaces at one end of a molecule. Adsorption and platelet attachment were shown to be inversely proportional to the length of the PEG chain 100 monomer units provided minimal adsorption and adherence.- ... 

Lipid moieties coupled to polyethylene glycol (PEG) have been used to increase the blood circulation time of lipoplexes (Fig. 32). The PEG-lipid conjugates such as DOPE-PEG, Chol-PEG, ceramides-PEG and their derivatives are then coformulated with the cationic lipid, helper lipid, and DNA. This results in coating the surface of the lipoplexes with PEG and preventing undesired association with plasma proteins or circulating cells (stealth liposomes). Recently, a-tocopheryl PEG-succinate (TPGS) was also used in gene delivery formulations because of its ability to confer not only a stealth property but also antioxidant and absorption enhancer properties [129]. 

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