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Thermal stability of selected green dyes at 37°C in 4% neutral buffered formaldehyde. Amount of intact dye remaining on dye-coated filter segments was determined for PTIR/NeuroVue dyes with excitation maxima near 488 nm as a function of incubation time and temperature (see Materials and Methods for details). The rank order of thermal stability was PTIR 327 best, followed by NV Jade, PTIR 326, and NV Emerald (see Table 3).
