This article has provided representative experimental results for three chemical reaction systems. Each system possesses a conversion and/or product selectivity that exhibits a response to changes in the water density/concentration, Collectively, these data add to the growing literature in this area, which shows that water density is an important variable for different types of reactions in SCW. In none of these cases has the precise cause of the density dependence been elucidated, in large part because the precise chemistry taking place has not yet been established definitively.
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