Rebound properties

Finally, suppressing the oscillations by changing the substrate injection rate in the model can lead, depending on the final value of this parameter, to a phenomenon of rebound (fig. 3.21) that is also observed in neurons of the thalamus. According to Llinas (1984), the rebound property could play an important role in neuronal excitability involved in the origin of muscular tremor. 

The expansion creates an internal force in the molding compound, which is maintained until gel or cure takes place. This results in reduction of surface defects, voids and hollow parts. It will also reduce resin shrinkage while a syntactic foam core is established. Parts containing hollow microspheres can be deflashed and trimmed more easily and with less work. They are also easier to grind, drill, tap, and thread with increased holding power, which can be attributed to the syntactic foam, which will exhibit compression/ rebound properties. 

Tear, Fracture Energy, Compression Set and Rebound Properties... 

The property of polybutadiene of most interest to the mbber compounder is excellent abrasion resistance coupled with excellent resilience. The polymer has very high rebound and low heat generation. With a few exceptions, such as the core of soHd golf balls, the polymer is blended with other polymers to take advantage of its excellent abrasion and rebound. Uses in North America are as follows tires, 500,000 t (74%) plastic modification,... 

These results are inconsistent with a radical rebound mechanism because this mechanism is a two-step process that requires the involvement of intermediates. Instead the results suggest that the hydroxylation is a concerted process, much like a singlet carbene reaction, which does not involve intermediates. However, this conclusion is in conflict with the properties of singlet carbene reactions discussed above. Subsequent studies on a number of substituted methylcyclopropanes and other stained hydrocarbon systems established that these findings were not anomalous. 

It is apparent that the need for a secure supply of mineral commodities is currently driving some countries, and forward-thinking companies, to continue to acquire, prospect for, evaluate, and enter into feasibility studies of, potential near-term mining properties. In some cases, properties are being prepared for immediate production by either completing construction of mining infrastructure or by expansion of existing mine and mill capacities. The idea is to have a property ready to increase production or to be put into production when commodity prices rebound, and to do so more quickly than... 

Discontinuation Problems Further controversy has surrounded misleading claims in the lay media that SSRls have addictive properties. These centre around reports of patients suffering symptoms when trying to discontinue medication. As with the benzodiazepines, these symptoms may be a recurrence of the premorbid anxiety, although rebound anxiety has not been clearly demonstrated. Self-limiting symptoms associated with SSRl withdrawal have been widely reported (Haddad 1998), and are generally described as the SSRl discontinuation syndrome (Table 4). The most frequently occurring symptoms are dizziness, nausea and headache. 

Silica fume when used in conjunction with superplasticizers plays an important role in improving the cohesion of the shotcrete mix, allowing for the build-up of the sprayed concrete on vertical surfaces, within a short period, without sloughing off. In addition the combination of these admixtures has provided ease of pumping, better compaction and greatly reduced the rebound, thus minimizing waste and cleaning time. Typical mixture proportions and properties for wet-mix superplasticized shotcrete are presented in references 69 and 72. 

Another parameter, A, derived from ball-rebound values, has also been used in conjunction with txF and surface area measurements to characterize carbon blacks in terms of vulcanizate properties ... 

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