Two-tailed r-test

The experiments described here are principally diagnostic in nature where cellular biomass was significantly enhanced in bottles after resource (iron or light) amendment, relative to control (or other) treatments, we infer that algal growth rates in the control (or other) treatments were limited by a deficiency in that resource. The statistical significance of differences between mean values of parameters measured in different treatments were assessed using a two-tailed r-test for comparisons between two treatments, or a one-way analysis of variance (ANOVA) for comparisons between three or more treatments, at a confidence level of 95% (P = 0.05). 

Figure 8 Dose-response of SCM-chitin III on haptotactic migration of tumor cells. B16-BL6 cells (2 X 10" ) were seeded on the filter precoated on the lower surface with 5 xg laminin. Various concentrations of SCM-chitin III were added into the lower compartment of a Transwell chamber. After a 6-h incubation, the migrant cells on the lower surface were visually counted. P > 0.001 compared with the control by Student s two-tailed r-test.

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