Archaeological Chemistry IV by Ralph O. Allen (Ed.)

By Ralph O. Allen (Ed.)

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Enzyme loadings of over 10 million units of active enzyme per cubic foot are not uncommon. The isomerization process can be conducted in either of two ways, depending on market conditions. In the summer, when the demand is great, it is common to run dextrose through the columns as quickly as possible to supply the customer. This method of operation results in higher column temperatures that shorten the life of the enzyme. The columns need to be changed more frequently, but the market demand can be met without building excess manufacturing capacity.

This once-a-day patch provides medication without interfering in a patient's daily activities or without having to take pills several times a day. It does not require puncturing the skin with a needle. Chemical engineers are involved in the design and manufacture of new polymer systems for medical applications such as this. Courtesy, ALZA Corporation. These opportunities roughly parallel the frontiers that have opened up in the human health area. In agriculture, a deeper understanding of biological processes in plants has paved the way for biologically derived fungicides and herbicides that are highly potent, species specific, and environmentally safe.

Biochemical processes in humans can now be measured by such techniques as positron emission tomography, magnetic resonance imaging, and x-ray computer-assisted tomography, and the measurements can be enhanced by digital subtraction methods. Chemical engineers can help elucidate the data obtained by such techniques by developing quantitative models that incorporate thermodynamics, transport phenomena, fluid mechanics, and principles of chemical reaction engineering. These advances will lead to improved therapeutic procedures.

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