As frequently added to adhesives, the mono-functional monomer 2-hydroxyethyl methacrylate (HEMA) acts as co-solvent and improves surface wetting. Nevertheless, HEMA promotes watersorption hydrolysis at adhesive interfaces, affecting bond durability dentin. This study investigated if two acrylamide co-monomer alternatives could replace in experimental adhesive-resin formulations part of 3/2-step...

In many bacteria, including the enteric species Salmonella typhimurium and Escherichia coli, heme is synthesized starting from glutamate by a pathway in which the first committed step is catalyzed by the hemA gene product, glutamyl-tRNA reductase (HemA). We have demonstrated previously that when heme limitation is imposed on cultures of S. typhimurium, HemA enzyme activity is increased 10- to 2...

Room-temperature vulcanizing silicone and homopolymers of 2-hydroxyethyl methacrylate (HEMA) have been used to permanently inflate detachable balloons [1] . HEMA is preferred over silicone because it is less viscous and is water soluble. Goto et al. [2] described a commercially available (HEMA A, lnterventional Therapeutics, S. San Francisco, CA) polymerizing substance that includes HEMA as the...

Medical titanium alloy Ti-6Al-4V (TC4) has been widely used in the medical field, especially human tissue repair. However, TC4 some shortcomings, which may cause problems with biocompatibility and mechanical compatibility direct contact body. To solve this problem, physical gels are formed on surface of TC4, storage modulus gel matches that soft tissue. 2-bromoisobutyryl bromide (BIBB) dopamine...

for the purpose of increasing the permeability to oxygen and equilibrium water content in contact lenses, polar copolymers with nonionic monomers such as 2-hydroxyethle methacrylate(hema) is used. by adding the polar monomers to (hema), the permeability to oxygen and equilibrium with water content is increased and also the absorption of proteins on lens surface is changed. in this research, the...

In Sweden as well as in many other countries most materials currently used for dental restorations contain acrylate and methacrylate monomers (1). As a consequence of increased use of resin-based compounds, there has been an increase in reported cases of irritant and allergic contact dermatitis mainly among dental professionals (2-5). The most common agent causing dermatitis among dental profes...

In this study, firstly, (2-oxo-2-(3,4,5-trifluoroanilino)-ethyl-2-methylprop-2-enoate) FAOEME, a methacrylate monomer with arylamide side group containing three fluorine atoms in the branch, was synthesized. Poly(HEMA-co-FAOEME) obtained due to radical copolymerization of FAOEME 2-hydroxyethyl (HEMA). Structural characterization its copolymer and HEMA performed by spectroscopy methods such as F...

Insight in the osmotic behavior of degrading hydrogels is of great importance in the design of biodegradable hydrogels for biomedical applications. This study compares the degradation behavior of PEG-HEMA (hydroxyethylmethacrylated polyethylene glycol) and dex-HEMA (hydroxyethylmethacrylated dextran) hydrogels. The degradation of PEG-HEMA gels takes several months to over a year, while that of ...

Because Methacrylic monomers are used in dental work, dental personnel, technicians, and patients are at risk of being sensitized. 2-hydroxyethyl methacrylate (2-HEMA) and ethyleneglycol dimethacrylate (EGDMA) are commonly used. Allergic test reactions to them sometimes appear beyond D7. This study was designed to study the development and course of positive test reactions to 2-HEMA and EGDMA i...