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This analysis configuration permits operator-dependent selection and measurement of DNA content using a magnification of x200.

Comets were visualised at × 330 magnification and DNA damage was quantitated using the Tail Moment parameter (i.e. the distance between the barycentre of the head and the tail of the comet multiplied by the percentage of DNA within the tail of the comet).

DNA was neutralized, stained with SYBR green (1 10 000 dilution) and visualized by fluorescence microscopy (Nikon Eclipse E400) at 20× magnification.

The DNA reassociation results in the quadratic magnification of expression ratios for the up- and down-regulated genes in control and tester samples.

To test for an association between DNA fragmentation and head shape at high magnification in fresh motile spermatozoa.

The percentage of TUNEL-positive apoptotic ATII cells labeled with fluorescein (fluorescein-dUTP-labeled DNA) was calculated per 10 high-power fields (magnification 10 × 40).

A third display allows visitors to explore both DNA and fossil specimens in ever increasing powers of magnification.

Higher magnification views of selected Nde1−/−Trp53−/− cells are included to show uncondensed DNA in PH3+4A4− but condensed DNA in PH3+4A4+ cells.

Samples were imaged with high magnification (100/1.47 objective lens) and mycoplasmas appear as extranuclear DNA. Figure 5 presents an image showing mycoplasma infection.

The cells with condensed and fragmented DNA (apoptotic cells) were scored under a fluorescence microscope (Carl Zeiss, Germany) using the magnification indicated in the figures.

Higher magnification of these cells and analysis of their nuclear configuration by DNA staining with DAPI (Fig.  1 inserts) revealed these spots as mitoses.