OBJECTIVES The objective of this study was to investigate the influence of the chemical structure of methacrylate monomers used in dentin adhesives on degree of conversion (DC), water sorption, and dynamic mechanical properties. MATERIALS AND METHODS Experimental adhesives containing 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy) phenyl]-propane (BisGMA), 2-hydroxyethyl methacrylate (HEMA), and ...

Using magnetic particles as a solid-phase extraction system is the most frequently used micro-technique for DNA isolation. Particles with a complete covering of magnetic cores by a polymer are hence preferred. Quantitative polymerase chain reaction (qPCR) was used for the evaluation of the polymer coating efficiency of hydrophilic magnetic poly(2-hydroxyethyl methacrylate-co-glycidyl methacryla...

In this study, we developed quartz crystal microbalance (QCM) nanosensor for the real-time detection of tobramycin (TOB). Firstly, the modification of gold surface of QCM chip was performed by self-assembling monolayer formation of allyl mercaptane to introduce polymerizable double bonds on the chip surface. Then, TOB imprinted poly(2-hydroxyethyl methacrylate-methacryloylamidoglutamic acid) [p...

OBJECTIVE To create and test a slow-release antifibrotic drug-coated glaucoma drainage device using in vitro and in vivo experiments. METHODS A slow-release device incorporating mitomycin C in poly(2-hydroxyethyl methacrylate) disks was developed using redox-polymerization techniques. A standardized preparation of this drug delivery device was attached to the Ahmed glaucoma valve (model FP7; ...

PURPOSE Currently available ophthalmic drug delivery systems are inefficient and may lead to side effects. To increase efficiency and reduce side effects, the authors propose disposable particle-laden soft contact lenses for ophthalmic drug delivery. METHODS The essential idea is to encapsulate the ophthalmic drug formulations in nanoparticles and to disperse these drug-laden particles in the...

This work aimed to overcome the main drawbacks of some essential anticancer drugs as 5-Fluorouracil (5-FU) by controlled loading with novel drug carriers. By a differential microemulsion technique, nanosized particles derived from copolymer poly(methyl methacrylate (MMA) and 2-hydroxyethyl (HEMA)) different monomer ratios have been synthesized used carrier. Poly(MMA-co-HEMA)/MWCNT nanocomposite...

The expressions of the isofunctional genes ubiD and ubiX of the ubiquinone biosynthetic pathway of Escherichia coli were compared under a variety of growth conditions and in several genetic backgrounds. LacZ operon fusions were constructed and were inserted in single copies into strain MC4100 and into its fnr, arcA or hemA carrying derivatives. During aerobic growth the expressions of both ubiD...

m Implantation of posterior ch.unber lenses (intmcalar lens = IOL) is an established method to replace opaque lenses. Prefered positioning of implanted lenses is in the capsular bag. either with or without touching the posterior capsule. Purpose of the present study is to determine the real position of the implanted lens in relation to the posterior capsule and to measure a possible distance be...

OBJECTIVES Published transmission electron microscopy analysis of in vitro resin-dentin bonds shows that, after 44 months, almost 70% of collagen fibrils from the hybrid layer disappear. Matrix metalloproteinases (MMPs) play an important role in that process and are thought to be the main factor responsible for the solubilization of dentin collagen. Therefore, this study aimed to evaluate the i...

Managingin tersc hema knowledge isan essen tial taskwhen dealing withcoopera-tiv e information systems. W e prop osea logical approac h totheproblem ofboth expressing in tersc hema knowledge, and reasoning aboutit. Inparticular, we set up a logical language forexpressing seman tic in terdep endencies bet weenclasses belonging todifieren t database sc hemas,and sho w thatreasoning oversuc h in-t...