Seawater tastes saltier in some places than others, yet its major dissolved salts usually keep nearly the same proportions. If chloride rises in a sample from the open ocean, sodium and the other major ions tend to rise with it in predictable ratios. This regularity is known as Forchhammer’s principle or the principle of constant…
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A study in the Journal of the American Chemical Society found that tunable tungsten carbide catalysts can hydrocrack polyolefin plastics efficiently, even when the feedstock contains 10 wt % PVC. The JACS study, published online on December 17, 2025, reports a catalyst design that tackles a stubborn problem in chemical recycling: mixed plastic streams that…
