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Toxicol Sci 91 , 365371, doi: 10.1093/toxsci/kfj165 (2006)
This chart uses sections 1 and 2 of the curve we saw earlier and shows that the first 58 users are enough to discover 80% of usability problems of a system
avoid repeated freezethaw [8]
doi: 10.1172/JCI97943, 3
A special device obtained from the Technical Faculty at the University of Zagreb, Croatia using the formulas: breaking force (N/mm2)=force (N)/cross-section skin burned area (mm2)
The Canadian Drinking Water Guidelines and the United States National Secondary Drinking Water Regulations (NSDWRs) both recommend that drinking water should be discharged between a pH of 6.5 and 8.5
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