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Feature



Subscriber-Only

Fabricated parts—metal structures formed by cutting, bending, and assembling—are the underpinnings of modern life. They include everything from the steel girders that support our buildings to the oven rack that allows the bread to rise. As new technology makes old technology...



Subscriber-Only Gas Chromatography — Mass Spectrometry

Gas chromatography-mass spectrometry (GC-MS) is one of the most important tools in analytical chemistry. Where other analytical techniques determine quantitative issues arising from analysis of a sample (how much of a chemical is present), GC-MS is able to identify qualitatively the...


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