Resistivity aging time effect

The effect of catalyst slurry and sol age time on the Attrition Indexes of the CP-formulated samples is seen in Table III. There is a trend toward greater attrition as the batch holding time increases for both CP-2 products. Concomitantly, the viscosity range becomes higher, as was observed previously. CP-5 also appears to lose attrition resistance as the age and viscosity of the slurry advance. On the other hand, the holding time does not impact the CP-25 Attrition Index. The CP-2(4) material, made with a sol aged 4 hours, exhibits lower AI values, and, perhaps, a longer useful batch lifetime. 

All EP2 samples resist chemical degradation in TA. The more mobile phase, which is found in the layers directly after curing, develops in the bulk EP2 only with aging time. Hence, the steel substrates stimulate the observed phase separation. Water induces a similar effect in HTA. Moreover, in all samples, part of the absorbed water is consumed in a chemical reaction that causes the cleavage of the imino ether-like crossHnks. 

After over half a century of chemotherapy research, cancer remains one of the most difficult life-threatening diseases to treat, a consequence of factors that include limitations of animal models, tiunour diversity, drug resistance and the side effects of therapy. Although there have been successes, most notably in treatment of testicular cancer [1], chemotherapy can currently still offer only a modest increase in survival time in the majority of advanced disease cases [2], The incidence of cancer is increasing due to ageing populations in most countries, and it has been estimated that in 20 years time there will be 20 million new cancer patients worldwide each year [3]. An optimistic view, however, is that in the coming decades advances in prevention, detection and treatment will see cancer becoming considered not as a fatal but as a chronic disease [3]. 

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