Homogeneous catalysis heterogeneous catalysis is the petrochemical alkylation process, where the liquid reactants are immiscible with a solution containing the catalyst. Heterogeneous catalysis offers the advantage that products are readily separated from the catalyst, and heterogeneous catalysts are often more stable and degrade much slower than homogeneous catalysts. However, heterogeneous catalysts are difficult to study, so their reaction mechanisms are often unknown. Enzymes possess properties of both homogeneous and heterogeneous catalysts. As such, they are usually regarded as a third, separate category of catalyst. Homogeneous catalysis In chemistry, homogeneous catalysis is catalysis in a solution by a soluble catalyst. Homogeneous catalysis refers
A Woman of Substance ten years after Emma's death. All three programmes are available on DVD. A Woman of Substance A Woman of Substance is a novel by Barbara Taylor Bradford, published in 1979. The novel is the first of a seven-book saga about the fortunes of a retail empire and the machinations of the business elite across three generations. The series, featuring Emma Harte and her family also includes "Hold The Dream", "To Be The Best", "Emma's Secret", "Unexpected Blessings", "Just Rewards" and "Breaking the Rules". "A Woman of Substance" was adapted as "an eponymous television miniseries" as were the sequels "Hold The