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Structure Probe Inc Quantifoil R1.2/1.3 Micromachined Holey Carbon Grids, 400 Mesh Gold, Pk 100, SPI Slide-A-Grid Box
Supplier: Structure Probe Inc 4240GXA
Quantifoil holey films with 2 µm circular holes are used with magnifications in the range of 30,000X to 40,000X. Quantifoil R 2/4 is probably recommended over R 2/2 when an increased tolerance with respect to position of the beam, and a larger beam diameter is desired, such as in the case of automated image acquisition. Quantifoil R 2/1 has more open area than R 2/2. It is usually used when focussing is carried out on the edge of a hole burned into the ice in a neighboring hole instead of on the foil adjacent to the hole.
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