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21.
Three methods for the evaluation of the relative amount of DNA per nucleus by absorption cytophotometry are compared. A combination of the two-wavelength method (Patau, 1952; Ornstein, 1952), the one-wavelength two-area method (Garcia, 1965) and the determination of transmission through nuclear plugs is proposed in order to estimate systematic errors made by absorption cytophotometry. 相似文献
22.