In the manufacturing industry, nding an orientation for a mold that eliminates surface defects and insures a complete ll after termination of the gravity casting process, is an important and diicult problem. We study the problem of determining a favorable position of a mold (modeled as a polyhedron), such that when it is lled, no air bubbles and ensuing surface defects arise. Given a polyhedron...

With a growing awareness of the potential hazards of chemical and biological agents in our homes, schools and workplaces, a greater emphasis has been placed on evaluating the role of mycotoxins and mycotoxin-producing fungi in our indoor environments. Now, more then ever, the potential health effects of airborne molds and other biological contaminants are being given serious consideration in IA...

In thermal characterization tests of bone cement according to the ASTM Standard Specification for Acrylic Bone Cement, time-temperature profiles of bone cement were observed to be sensitive to the thickness of the cement patty and the mold material. Due to the heat transfer from cement to the surrounding mold, such tests might underestimate the exothermic temperature of bone cement. Developing ...

the antifungal potential of essential oils of thyme (thymus vulgaris l.), rosemary (rosmarinus officinalis l.), and laurel (laurus nobilis l.) was determined. to establish this antifungal potential, two molds related to feed spoilage, namely, aspergillus flavus and aspergillus parasiticus, were selected. the agar dilution method was employed for the determination of antifungal activities. the i...

Industrial hygienists (IHs) are called upon to investigate exposures to mold in indoor environments, both residential and commercial. Because exposure standards for molds or mycotoxins do not exist, it is important for the industrial hygienist to have a broad knowledge of the potential for exposure and health effects associated with mold in the indoor environment. This review focuses on the tox...

This study compared the surface detail reproduction and dimensional accuracy of stone models obtained from molds disinfected with 2% sodium hypochlorite, 2% chlorhexidine digluconate or 0.2% peracetic acid to models produced using molds which were not disinfected, with 3 alginate materials (Cavex ColorChange, Hydrogum 5 and Jeltrate Plus). The molds were prepared over matrix containing 20-, 50-...