Acrylics embedding media

To achieve needed comfort, dentures must be custom-made. To form the customized denture, in which the artificial teeth are embedded, a wax pattern is used. The wax pattern is inserted in a plaster or dental stone in a split mold flask. After removal of the wax, the surface of the resulting mold cavity is painted with a separating medium, usually an aqueous alginate solution, followed by the addition of the acrylic resin. The separating medium aids in removal of the cured acrylic from the mold. 

The stereoselective of the ring expansion reaction for the nonracemic 2-pyrrolidine acrylic ester 246 and related systems has been thoroughly investigated by Nubbemeyer. The reaction proceeds via the chair-like transition state 247 and yields 2-azonine 248 with excellent trans-diastereoselection. Products characteristically display E-olefin embedded within a medium-sized ring. Nubbemeyer has studied the relative stability of these slowly interconverting conformers of medium-ring lactams which exhibit planar chirality and effectively demonstrated this chemistry in natural product synthesis. ... 

Ultrathin sectioning of TEM samples requires embedding in a medium sufficiendy rigid to be cut at nm thickness and able to withstand bombardment from the electron beam. Therefore, when the first efforts were made to develop post-embedding EM ICC, alternatives to classical embedding in hydrophobic resins have been sought. A series of acrylic hydrophilic media were then introduced into use, many of which could also be used for LM studies (Table 3). 

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