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Fig. 2. Mitochondrial luminosity within the Malpighian tubules of animals reared in
acidic (pH 4), neutral or alkaline (pH 11) media. Mitochondrial densities were
influenced by environmental pH within the proximal tubule (P<0.05,
F=4.24, d.f.=17) and within the distal tubule (P<0.003,
F=8.92, d.f.=17, single factor ANOVA). N=6/pH value. All
measurements were made with an exposure time of 1/8 s and at the same
magnification (x100). Data are presented as means ± s.e.m.