Procedures for the synthesis and purification of two 14C-labeled alkyl polyoxyethylene detergent preparations are described. One of the preparations consisted mainly of [14C]dodecyloctaoxyethylene ether, the other consisted mainly of [14C] octylhexaoxyethylene ether, with critical micellar concentrations of approximately 50 microM and 10 mM, respectively. Condensation of alkyl bromides with fra...

The immobilization of synthetic analogues of the [FeFe]-hydrogenase, [FeFe]H(2)ase, enzyme active site on polyethyleneglycol-rich polystyrene beads is described. Using the reactivity of the amine termini of the PEG chains with carboxylates incorporated into (mu-SRS)[Fe(CO)(3)](2) or (mu-SR)(2)[Fe(CO)(3)](2) derivative, nu(CO)IR signatures can be used to interrogate the structure and properties ...

This study was conducted to evaluate the response of almond genotypes to osmotic stress in vitro in order to screen drought tolerance. Explants subjected to polyethyleneglycol osmotic stress (0, 3.5, and 7.0% WV) on the MS medium. Concentrations of photosynthesis pigments, anthocyanins, and carothenoids were significantly reduced under osmotic stress. Under osmotic stress, leaf water content, c...

Phenolic compounds can be efficiently O-methylated with tetramethylammonium chloride in diglyme or polyethyleneglycol (PEG) at temperatures of 150-160 °C and in the presence of either K2CO3 or NaOH. When applying benzyltrimethylammonium chloride as a reagent, the benzylation and methylation of phenols occurs, with the benzylation product always predominating. With allyl-substituted phenols as s...

Previous reports have designated the labeled derivatives of [4-(phenylamino)-quinazoline-6-yl]-amide group as the most promising EGFR-PET imaging agent candidates. To further improve tracer qualifications and increase stability and solubility, additional derivatives of this group substituted at the 7-position with various lengths of fluoro-polyethyleneglycol (F-PEG) chains were synthesized. The...

Varying the polyethyleneglycol spacer between two (iso)-nicotinic groups of the ligand systems, a large structural variety of silver coordination compounds was obtained, starting with zero-dimensional ring systems, via one-dimensional chains, helices and double-helices to two-dimensional polycatenanes. Theoretical calculations help to understand their formation and allow predictions in some cas...

A 23-year-old female patient presented with diffuse swelling causing intermittent pain involving the left side of face that had been present for over 10 years. Extra-oral examination revealed expansile lesions in maxilla and mandible, appeared mixed radiolucent-radiopaque on panoramic radiography. The maxillary lesion resulted opacification sinus. mandible trabecular bony changes larger radiolu...