Mold Development

Isocure A process for making foundry molds developed by Ashland Chemical Company. In 1990 it was announced that a pilot plant was to be built in cooperation with the USSR and that the process had been licensed in China. See also Pep Set. 

Theoretical models shed light on additional aspects of pulsatile cAMP signaling in Dictyostelium. First, like Ca + spikes, cAMP pulses are frequency encoded. Only pulses delivered at 5-min intervals are capable of accelerating slime mold development after starvation. Simulations indicate that frequency encoding is based on reversible receptor desensitization [76]. The kinetics of receptor resensitization dictates the interval between successive pulses required for a maximum relay response [78]. Second, cAMP oscillations in... 

Symptoms Onions appear healthy when growing, but become soft after 8-12 weeks in store. Brown sunken lesions and a fluffy gray mold develop in the neck. The upper part of the bulb is soft when pressed, with brownish-black discoloration under the dry outer leaves. The fungus spreads downward through the bulb, which in severe cases may decay completely. 

Symptoms Stems become dark brown at soil level. Gray mold develops on young buds and flowers. Stems wilt and collapse. Flowers may fail to open. 

Incubation conditions. Preliminary trials indicated that incubation at 20 °C for 72 h in darkness is optimal. This relatively low temperature allows adequate wheat growth while retarding mold development. 

Foams can be produced by a foam molding process (19). In this process, the formulated molding mold is pressed and heated for a predetermined time period. During this time, gases inside the mold develop. 

Husky Newsletter, (Feb. 1978), "Stack Mold Developments", Husky Injection Molding Limited, P.0. Box 1000, Bolton, Ontario, Canada LOP 1A0. 

Huntsman Also called the Crucible process. A method for purifying blister steel, made by cementation, by melting it in a closed clay or graphite crucible and pouring the melt into a cast iron mold. Developed by B. Huntsman, a clockmaker, around 1740, initially in Doncaster and later in Sheffield, UK. The process was not patented but was operated in secrecy for some years. It was subsequently widely operated in the UK, Europe (where the combination of this with the cemen-... 

This chapter presents an overview of performance plastic polymers in commercial planar and 3-dimensional circuit board products, and describes in detail one approach (two-shot molding) developed as an integrated 3-D circuit manufacturing technology. The distinctions between conventional planar (2-dimensional) circuitry, based on thermoset laminates and "subtractive etching processes, and the enhanced design flexibility afforded by expanded interconnection capacity in three axes are discussed. Specific examples of 3-dimensional interconnect protoypes and products are described and pictured. 

Other data on zinc borate efficiency against molds are less optimistic. For example, 1% of zinc borate practically did not effect mold development on a 60-mesh maple wood flour (70% w/w)-filled HDPE (Table 13.3). Only 3 and 5% of zinc borate were effective (Table 13.3). 

Good koji has a pleasant smell, lacks any musty or moldy odor, and is quite sweet in taste. The mature koji is taken out from the koji room to be mixed with salt to halt further mold development. Recently, a mechanical koji fermentor has been devel-... 

Agar gel is added to the nutrient medium to cul-mre yeast prior to counting. It is supplemented with biphenyl (0.015% in ethanol) to prevent mold development and 0.01% chloramphenicol to inhibit bacterial growth. Cycloheximide (0.1%) may be added to select non-Saccharomyces" Brettanomyces, etc.) yeasts, as they alone survive this treatment. The incubation period is around 2-3 days for the Saccharomyces genus and... 

Individuals who were exposed to hay or hay dust contaminated with trichothecene-producing molds developed severe cutaneous irritations.38... 

A system for sandwich molding developed by Aron Kasei uses fiber-reinforced ABS as the outer skin and a PLS conductor (see below) as the inner core. Applications include keyboard housings, printer housings, CRT enclosures, and medical equipment housings. 

This process has been used since the 1940s to provide better control of the molding cycle to fabricate parts that are more precise. Those that used it were Bell Laboratories (USA) and D. V. Rosato. This technology is to combine IM of the compound with a complete or partial vacuum in the mold cavity, to facilitate the impregnation of the reinforcement. The vacuum injection process requires a perfect seal around the edge of the mold. Development included applying vacuum from the hopper, through the plasticator, and into the mold. It has very little interest. 

To reduce the time to reach equilibrium and to reduce the problem with mold development, another version of the static method is to force conditioned air of known temperature and relative humidity over the sample until the change in mass of the sample is small (<0.01 g). A variation to this method can be used when determining thin-layer drying or wetting characteristics of a sample. The variation is that it is not necessary to bring the sample to equilibrium, and... 

Further Blow Molding Developments of PET/PEN Blends Bottles, by Luc Desoutter, Group Sidel. Presented at Bev-Pak America 95. 

---