The High-Performance Liquid Chromatography (HPLC) Retention Time (HPCR) is a technique used to analyze and separate compounds in a sample. In the context of a non-diseased tissue sample and a tumor sample, the Cr value represents the retention time of the compound being analyzed.
In this case, you would expect the Cr value of the tumor to be higher than that of the non-diseased sample. This is because tumors often contain abnormal compounds or metabolites that have different properties compared to those found in non-diseased tissues. These differences in properties result in a longer retention time during HPLC analysis.
However, the Ci value, which represents the concentration of the compound, would be the same for both tissue samples. This is because the Ci value is determined by the concentration of the compound in the sample, and it is not influenced by the tissue type or disease status.
To summarize, the Cr value of the tumor sample would be higher than the Cr value of the non-diseased sample, while the Ci value would be the same for both tissue samples.