Figure 4From: Long-term follow-up of nephrotoxicity in rats administered both melamine and cyanuric acidChange in crystals after melamine and cyanuric acid administration in 6-week-old male rats (a-c) and female rats (d-f) observed using polarized light optical microphotography (×40). Crystals are seen at day 0 (a, d), day 14 (b, e), and day 28 following the 28-day administration period (c, f). Arrowheads indicate crystals.Back to article page