This study evaluated water sorption in heat-polymerized acrylic resins processed in monomaxillary flasks by water bath and in bimaxillary flasks by microwave energy and water bath. Fifty heat-polymerized acrylic resin specimens were fabricated according to the 12th specification of the American Dental Association and assigned to 3 groups: group 1 was processed by water bath in monomaxillary met...

In this paper, extensive study of ring-opening polymerization ε-caprolactone (ε-CL) using lipase Novozym 435 as catalyst in flask level and reactor level were conducted. The polymerization rates increase with an increase in time up to 4 h after which there has been a steep decrease for all temperature from 50 to 100 °C in the flask level. The conclusion out of flask level and reactor level stud...

It is generally recognized that the surface water from a well or tank is not a fair sample of the average quality of its water. It is, therefore, of considerable importance, especially when taking samples for bacteriological examination to obtain water from a depth of about 3 feet from the surface and to avoid contamination from the upper layers. Various apparatuses have been designed for this ...

A simple technique is described for the rapid and accurate calibration of flask press spring loads for studies in which denture base resins require to be processed under uniform loading conditions. The technique was evaluated in com­ mercially available flask presses and was found to perform with a high degree of precision. It offers a simple solution to the problem of standardising flask press...