Balance the tubes by adding isopropanol or extraction buffer. Produce a pellet of DNA by centrifuging at 15,000 rpm for 15 min. Gently pour off the supernatant and lightly dry the pellets by inverting the tubes on paper towels for 1-2 min.
Onions not only provide flavor, they also provide important nutrients and health-promoting phytochemicals. High in vitamin C, onions are a good source of dietary fiber, and folic acid. They also contain calcium, iron, and have a high protein quality (ratio of mg amino acid/gram protein). Onions are low in sodium and contain no fat. Onions contain quercetin, a flavonoid (one category of antioxidant compounds).
This benefit of onion is also because of the strong aroma ( or pungent smell) of onion which brings immediate energy and strength into the person. (15) Aids In Managing Cholesterol Level Our heart is a vital organ of our body and it is, therefore, it is important for us to make sure that we are taking good care of our heart and as well as the entire cardiovascular system.