Instant Pudding Thickening Chemistry

Chemistry, Food
Ordinary “cook” pudding, such as Royal Pudding or Jello Pudding, has been around for decades. It is a starch product that, combined with milk, sets into semi-solid form through heating. However, “instant” pudding utilizes a different thickening mechanism. In fact, two thickening mechanisms. What are the mechanisms for instant pudding thickening? A Concrete Thickening Model It’s like making concrete from Portland cement! Really, like that? Think of what the Portland cement contains. It is largely a mixture of silicates. Among these are dicalcium silicate (CaO2)2•(SiO2) and tricalcium silicate (CaO2)3•(SiO₂2). Mixing the cement powder with water yields an inorganic polymer matrix. We will introduce a model for the thickening process of instant pudding in just a moment. First, though, you may enjoy looking at this very early Jell-o Instant Pudding commercial…
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Why is Soapstone Slippery?

[caption id="attachment_8570" align="alignright" width="440"] A 12th century soapstone Byzantine relief.[/caption] Most rocks are rough to the touch. Some are smooth. Asbestos is stringy. Sulfur is brittle. One very interesting rock variety is soapstone. It is called smooth and slippery. What makes soapstone slippery? I was raised in the North then moved to the South to where soapstone is is mined, Nelson County, Virginia. I take special interest in the stuff. As a young child, I watched spellbound as my father took a handheld soapstone and used it to sharpen our enormous carving knife. General Rock Types As kids we were taught there are three types of rock, sedimentary, igneous, and metamorphic rock. Sedimentary rock forms from mineral and organic materials near at earth's surface. These deposits form rock deposits over…
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