A technique is described in which a polyester casting resin is used instead of agar for the growth of Neisseria gonorrhoeae in a biphasic system. In complex medium, higher concentrations and stability of T1 colony type were obtained with resin than with either agar or broth alone after 24 h of incubation. In defined medium, the growth of gonococci and colony type stability were similar in singl...

Polystyrene resins with varied particle sizes (35 to 350-600 microm) and pore diameters (300-1000 A) were employed to study the effects of immobilization resin particle size and pore diameter on Candida antarctica Lipase B (CALB) loading, distribution within resins, fraction of active sites, and catalytic properties for polyester synthesis. CALB adsorbed rapidly (saturation time </= 4 min) for ...

Polyester gelcoat has been a useful and popular coating for RP fabrication for over twenty years. The gelcoat has not only been important as a protective coating for the fiberglass laminate in a large variety of construction applications, but in many cases has provided a cosmetically desirable finish that enhances the attractiveness and market value of the RP part. In recent years as the manufa...

This study has endeavored to develop an Al2O3-filled natural fiber reinforced polymer composite which is intended substitute the most widely used synthetic E-glass material. To attain desired objective of work, 0, 5, 10, and 15 wt% chopped flax/unsaturated polyester resin have been developed by conventional hand-lay-up method followed a compression molding process. Consequently, characterizatio...

Itaconic acid (ITA) is one of the top 12 platform chemicals. The global ITA market expanding due to rising demand for bio-based unsaturated polyester resin and its non-toxic qualities. Although bioconversion using microbes main approach in current industrial production ITA, ecological faces several issues to: low efficiency, difficulty employ inexpensive raw materials, high manufacturing costs....

Introduction The tremendous growth of activity in the composites industry continues to create a need for materials that meet the tough demands for environmental compliance and high performance at an economical cost. Much of this activity has been focused on composite systems based on unsaturated polyester resins (UPRs) and vinyl esters (VEs) utilized in laminating, gel coat and free-flowing mol...

Abstract Fiberglass-reinforced plastics (FRP) composite materials for ships that are widely used marine-grade unsaturated polyester resin matrix and combimat fiber, a combination of chopped strand mat (CSM) woven roving (WR) fibers. Although less popular than marine CSM–WR, biaxial warp-knitted glass fabrics have the potential to be applied as fiber laminates ship hull materials. A comparative ...