What is the best knife to obtain sections for electron microscopy?

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Multiple Choice

What is the best knife to obtain sections for electron microscopy?

Explanation:
Ultrathin sectioning for electron microscopy requires a knife that holds an ultra-sharp, durable edge through many cuts in hard resin. Diamond knives meet this need because of their extreme hardness and edge stability, which keep a razor-thin edge and produce uniform, smooth sections in the 50–90 nm range with minimal chatter and surface artifacts. Steel dulls quickly when cutting epoxy-embedded tissue, leading to thicker, uneven sections and compression. Ceramic knives, while sharp, are more brittle and can chip or wear unevenly under ultrathin sectioning. Titanium is strong but doesn’t maintain as sharp an edge as diamond, resulting in less consistent ultrathin sections. For consistent, high-quality EM sections, diamond is the best choice.

Ultrathin sectioning for electron microscopy requires a knife that holds an ultra-sharp, durable edge through many cuts in hard resin. Diamond knives meet this need because of their extreme hardness and edge stability, which keep a razor-thin edge and produce uniform, smooth sections in the 50–90 nm range with minimal chatter and surface artifacts. Steel dulls quickly when cutting epoxy-embedded tissue, leading to thicker, uneven sections and compression. Ceramic knives, while sharp, are more brittle and can chip or wear unevenly under ultrathin sectioning. Titanium is strong but doesn’t maintain as sharp an edge as diamond, resulting in less consistent ultrathin sections. For consistent, high-quality EM sections, diamond is the best choice.

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