The data from those trial, however, appeared to be more stable. Therefore, a time variation being included in the experiment would make the data more valid. The results of our garlic test were converted into unit of density for comparison to the garlic test results of the experiment of Christina and Elisa. Our garlic test data was then compared to the data of the tests of the other four substances in the original unit, due to the lack of time to mass and to convert the data. This, thus, make the pathway of comparison indirect.
Direct data have better accuracy.
The part of the plant used for testing for garlic, shallot, and onion is the bulb part. However, because the supply of our testing substances is supermarket, we were not able to buy the undergroud part of chives and leek, but used their leaves and stalks instead. Since various parts of the plant have various properties, this aspect of the experiment is not being completely controlled. Chives, garlic, leek, onion, and shallot have great potential medicinal value. Building on the experiment of Christina and Elisa and of ours, further investigations can be performed to obtain a better understanding of these herbs and a more definite conclusion.