Mold loading well

Resistance to puncture is another type of loading. It is of particular interest in applications involving sheet and film as well as thin-walled tubing or molding and other membrane type loaded structures. Hie surface skins of sandwich panels are another area where it is important. A localized force is applied by a relatively sharp object perpendicular to the plane of the sheet of material being stressed. If the material is thick compared to the area of application of the stress, it is effectively a localized compression stress with some shear effects as the material is deformed below the surface of the sheet. 

Alkaline phosphatase, an enzyme with a molecular weight of approximately 86,000, has been incorporated into a polyanhydride matrix using compression molded PCPP-SA 9 91. Five percent loaded wafers, 50 mg each, were perpared, and measured 1.4 cm in diameter, with a thickness of 0.5 mm. Release experiments were then conducted using techniques similar to those described for carmustine above. As can be seen in Pig. 13, the alkaline phosphatase was released in a well-controlled manner over a prolonged period of time, just over a month, from this polyanhydride. 

As in the alkaline phosphatase example above, p-galactosidase, an enzyme with a molecular weight of approximately 360,000, has also been incorporated into a polyanhydride and released in a well-controlled fashion. As is shown in Fig. 14, the release of 3-galactosidase was quite linear over most of the time examined, and was complete, reaching 100% release in about 800 hr. This experiment utilized 5% loaded, compression-molded wafers of PCPP-SA 9 91, 1.4 cm in diameter and 0.5 mm thick, weighing 50 mg. 

The thermal properties of fillers differ significantly from those of thermoplastics. This has a beneficial effect on productivity and processing. Decreased heat capacity and increased heat conductivity reduce cooling time [16]. Changing thermal properties of the composites result in a modification of the skin-core morphology of crystalline polymers and thus in the properties of injection molded parts as well. Large differences in the thermal properties of the components, on the other hand, lead to the development of thermal stresses, which also influence the performance of the composite under external load. 

Table I lists some properties of SMC and BMC. These are a function of resin composition, reinforcement, and molding conditions atid may be regarded as typical. This will serve as a frame of reference as to the property levels obtained with SMC and BMC. The differences which exist between SMC and BMC in tensile, flexural, and impact strengths are attributable to more than just the difference in glass loading. Fiber attrition arising from the compounding techniques for BMC as well as the shorter input fiber length account for the lower strengths.

Two refrigerators were loaded with food as shown in Figure 4. One of the boxes contained an ultraviolet lamp which operated only on the on cycle, while the other box was the control. Daily observations of the foods showed that the odor level in the box with the lamp as well as the transfer of odors from one food to another can be reduced to a large degree. Bacteria and mold on food and on the walls of a high humidity box are destroyed by the minute amounts of ozone generated by the lamp. The average concentration of ozone is approximately 0.1 p.p.m. by volume 10j... 

Total body load. Total body load (burden) is the total pollutant load from whatever source that the patient carries. This can include organic chemicals, heavy metals, and other inorganics, as well as biological (bacteria, viruses, parasites, molds, and food). 

Rhodifuse lode was designed to deliver sodium iodide in a source of drinking water continuously over a one-year period. It can be placed in a well to release a therapeutic supply of iodine (100 pg / day / individual) at a nearly constant rate. It is a modular matrix system which is composed of three polypropylene baskets, each of them containing three matrices (Fig. 10). The cylinder-shaped matrices are loaded with 30% Nal by weight. They are prepared by molding a dispersion of Nal powder in a two-component silicone RTV (platinum catalyzed). 

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