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...

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Polymers are substances whose molecules consist of a large number of units of a few types: the units themselves, consisting of a number of atoms, are usually referred to as the segments of the polymer. In the polymerization of a mixture of two monomers, the structure of each macromolecule contains units of both monomers. Such a polymer is called copolymer and the process of its synthesis is cal...

Current research concentrates on the impact properties of a particle reinforced polymer matrix composite material. The composite material consists of unsaturated polyester resin that is reinforced with aluminium hydroxide. Aluminium hydroxide acts as the hard phase and polyester as the binding agent. The aim of the work was to understand how the particle size and the filler material’s mass frac...

This work describes the study to investigate and compare the mechanical and thermal properties of raw jute and glass fiber reinforced polyester hybrid composites. To improve the mechanical properties, jute fiber was hybridized with glass fiber. Polyester resin, jute and glass fibers were laminated in three weight ratios(77/23/0, 68/25/7 and 56/21/23) respectively to form composites. The tensile...