CA Preparations

Reaction of 3-substituted isocoumarins (la-h) with excess of sodium borohydride in methanol gave the corresponding 2-(2-(hydroxymethyl)phenyl)ethanol derivatives (2a-h). Antimicrobial activities of synthesized compounds were measured, using Gram-negative (Escherichia coli, Salmonella typhi, Proteus mirabilis) and Gram-positive bacteria (Bacillus cereus, Staphylococcus aureus).

The biosynthesis of herpesvirus DNA in rabbit kidney cells is inhibited to 50% by PEA (2-Phenylethanol) at 0.65 mg PEA/ml. The inhibition of cellular DNA synthesis in uninfected cells by PEA is about twice as sensitive as that of viral DNA synthesis.
The cellular DNA-dependent DNA polymerase is inhibited in a non-competitive way. The 50% inhibitory concentration amounts to 0.8 mg PEA/ml.
In contrast the herpesvirus induced DNA-dependent DNA polymerase is 10-fold more resistant towards PEA.

Styrenic block-copolymer polymerizable surfactants, when engaged in emulsion polymerization of core−shell acrylic latexes, are forming copolymers containing a large majority of monomer units. These copolymers can be extracted, and analyzed, after extensive washing of the particles by ultrafiltration.

ω-(p-Vinylphenyl)alkanols, including methanol, ethanol, propanol, pentanol, and hexanol, have been partially alkoxidated with potassium naphthalene to initiate anionic polymerization of ethylene oxide (EO) in order to directly prepare the corresponding α-p-vinylphenylalkyl-ω-hydroxy poly(ethylene oxide) (PEO) macromonomers. p-Vinylphenylmethanol, i.e. p-vinylbenzyl alcohol (VBA) afforded the expected well-defined macromonomer via living polymerization mechanism and the kinetics have been examined as a function of extent of potassium-alkoxidation.

Anionic polymerizations of 2-(4-vinylphenyl)ethoxy(trialkyl)silanes and 2-(4-vinylphenyl)ethoxy(t-butoxydimethyl)silane were investigated with oligo(α-methylstyryl)dilithium or -dipotassium as initiator in tetrahydrofuran at −78°C. These monomers readily polymerized to form ‘living polymers’. Subsequent deprotection of the silyl groups from the resulting polymers gave poly[2-(4-vinylphenyl)ethanol]s of the desired molecular weights with narrow molecular weight distributions ().

Purpose: In this experimental study, a sutureless scleral buckling was performed by using a tissue adhesive glue to fixate a silicone band to the sclera. In fact, one of the major risks of traditional scleral buckling is accidental perforation of the bulb, which is more frequent when the sclera is extremely thin as it is in newborns or in eyes with high myopia or scleromalacia.

Poly[2-(4-vinylphenyl)ethanol]s of known chain legth and of narrow molecular weight distribution have been synthesized by means of anionic living polymerization of the corresponding trimethylsilylated monomer, 2-(4-vinylphenyl)ethoxy-(trimethyl)silane, followed by acid hydrolysis. A block copolymer of poly[2-(4-vinylphenyl)ethanol-b-styrene-b-]2-(4-vinylphenyl)ethanol has also been prepared using living polystyryldianion as the initiator.