A minimum 2-fold difference between mean levels of transcription in villus and crypt epithelial cells was used as criteria for determining "enriched" expression in each population.
One-way ANOVA was used to compare differences between mean levels of variables in the four groups, followed by HSD Tukey's post hoc analysis.
There was a significant difference between mean levels of DEHP detected in the three hospitals, with two of the hospitals having considerably higher levels (384 ng/g and 478 ng/g) compared with 46ng/gg.
These data show discordance between mean levels of pHe and lactate content in tumours; the results support those of Newell et al (1993) and suggest that the production of lactic acid via glycolysis causes acidification of culture medium, but is not the only mechanism, and is probably not the major mechanism responsible for the development of an acidic environment within solid tumours.
The average levels of these two major marker compounds in all the seven accessions showed significant quantitative variation (ANOVA, p < 0.05) between mean levels of marker compounds and their accumulation in different parts of the plant viz.
When the levels of OCPs in hair are compared between males and females, mean levels in females are significantly higher than in males.
The study of premenopausal women [ 12] found no statistically significant differences between cases and noncases in mean levels in either premenopausal or postmenopausal women, but the sample size was small (premenopausal women: 17 cases, 67 controls; postmenopausal women: 22 cases, 88 controls).
At P8 and P32, d-serine levels did not differ significantly between SR+/+ and SR /– retinas, but the mean levels in SR /– mice trended lower.
The mercury levels varied between species, and the highest mean level in muscle, 0.366 ppm, was found in great sculpin.
Open image in new window Fig. 3 Relation between mean serotonin levels in both forebrain and serum in all the study groups (Group I (C1 & C2), Group II, Group III).
