Glycols derivatives polyethylene glycol

Glycol derivatives Polyethylene glycol, propylene glycol... 

H. Suppositories Solid preparations which melt at body temperature delivering medication for at-site treatment or for absorption at that point (usually rectal, vaginal, or urethral). Excipients include cocoa butter, waxy fatty acids, and derivatives, polyethylene glycol, theobroma oil, as well as many ingredients found in G. 

Stone HD Jr, DiPiro C, Davis PC, Meyer CF, Wray BB. Hypersensitivity reactions to Escherichia co/i-derived polyethylene glycolated-asparaginase associated with subsequent immediate skin test reactivity to E. co/i-derived granulocyte colony-stimulating factor. J Allergy Clin Immunol 1998 101(3) 429-31. 

Specialties and intermediates consist of ethylene oxide derivatives (polyethylene glycol, surfactants, amines, deicing fluids, heat transfer fluids, lubricants, and solvents) solvent and emulsion systems (alcohols, acrylics, vinyl acetate, latexes, and modifiers) for use in paints, adhesives, and household... 

Synonyms Aluminum chlorhydroxide alcohol soluble complex Aluminum chlorohydrol propylene glycol complex Aluminum, chloro hydroxy propylene glycol complexes Aluminum, chloro propylene glycol complexes Definition Deriv. of aluminum chlorohydrate (coordination complex of basic aluminum chloride and propylene glycol or polyethylene glycol in which water molecules have been displaced by glycol)... 

A minimum level of humidity is generally necessary to obtain an antistatic effect therefore, antistatic agents will be hydrophilic substances (e.g., amino derivatives, polyethylene glycol esters, and ethoxylated fatty amines, which are ideal for PE and PP) that reduce the surface resistivity of plastics by more than 10 Qcm. 

Figure 2.1. Relationship between HLB and 8q for three classes of polyoxyethylated surfactants ( ) dodecanol derivatives (O) octylphenol derivatives (A) sorbitan monooleate derivatives ( ) sorbitan monostearate derivatives ( ) sorbitan monolaurate derivatives ( ) polyethylene glycol 3350." (Reproduced with permission of the American Pharmaceutical Association.)...

Partially dehydrated derivatives complexed with polyethylene glycol or propylene glycol exist. In the United of hydration has been replaced by glycine are particularly popular. Aluminum zirconium tetrachlorhydrex gly antiperspinant products. 

The viscosity of PVC pastes may be reduced in many instances by the presence of certain polyethylene glycol derivatives and related materials. Because of their tendency to exude, the use of these viscosity depressants should be restricted to levels of less than 1% of the total mix. 

Polyethylene glycol primary amines, indole derivatives, sympathomimetics stabilization and enhancement dipping solution, 20% in methanol [270]... 

In contrast to phosphorus esters, sulfur esters are usually cleaved at the carbon-oxygen bond with carbon-fluorine bond formation Cleavage of esteri nf methanesulfonic acid, p-toluenesidfonic acid, and especially trifluoromethane-sulfonic acid (tnflic acid) by fluoride ion is the most widely used method for the conversion of hydroxy compounds to fluoro derivatives Potassium fluoride, triethylamine trihydrofluoride, and tetrabutylammonium fluoride are common sources of the fluoride ion For the cleavage of a variety of alkyl mesylates and tosylates with potassium fluoride, polyethylene glycol 400 is a solvent of choice, the yields are limited by solvolysis of the leaving group by the solvent, but this phenomenon is controlled by bulky substituents, either in the sulfonic acid part or in the alcohol part of the ester [42] (equation 29)... 

Other common poly glycol-based antifoams include certain derivatives of polyethylene glycol (PEG), which are condensation polymers of ethylene glycol. An example is polyethylene glycol-8 dioleate. Apart from its antifoam properties, PEG-8 dioleate is also used in cooling water inhibitor formulations as a surface cleaner, in the formation of a corrosion-inhibiting surface film. Additionally, it is employed as an oil-soluble emulsifier for other defoamer chemistries. 

Laundry detergent may also contain polyethylene glycol, a polymer that prevents dirt from redepositing on the clothes. This function used to be the job of phosphates. Another polymer used for this purpose is carboxy methyl cellulose, which is derived from natural cellulose but is very soluble in water. 

The following Tables 2.1 to 2.3 summarize some examples based exclusively on thermochemical reactions on the sorbent surface which lead to the formation of fluorescent reaction products. The derivatives formed frequently remain stable for weeks [6] and the fluorescence can frequently be intensified and/or be stabilized by treatment with viscous liquids (liquid paraffin, Triton X-100, polyethylene glycol etc.). 

The development of catalysts for the efficient oxidation of catechol and its derivatives in water is topic of ongoing work in this laboratory. Towards this end, polyethylene glycol side-chains were incorporated in a pentadentate salen ligand to enhance the water solubility of the complexes derived thereof. A dinuclear copper(II) complex is found to catalyze the oxidation of 3,5-di-tert.-butylcatechol into 3,5-di-tert-butyl-o-benzoquinone more than twice as fast in aqueous organic solution as in purely organic solvents (ly,at/knon= 140,000). Preliminary data are discussed. 

In the previously described electrophoretic methods, the capillary was filled with electrolytes only. Another mode of operation in capillary electrophoresis involves filling the capillary with gel or viscous polymer solutions. If desired, a column can be packed with particles and equipped with a frit.68 This mode of analysis has been favorably used for the size determination of biologically important polymers, such as DNA, proteins, and polysaccharides. The most frequently used polymers in capillary gel electrophoresis are cross-linked or linear polyacrylamide,69 cellulose derivatives,70-75 agarose,76 78 and polyethylene glycols. 

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