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).
Complex Carbs Endure. Starch is the form of carbohydrate usually referred to as complex carbs. Onions and other plants store the sugar they need in the form of starches. These carbs are similar to simple sugar because they consist of molecules of sugar.otal Carbohydrates. One small raw onion, which equals about two large slices, has 6.5 grams of total carbohydrates. The recommended dietary allowance for healthy men and women is 130 grams of total carbohydrates daily, so you'll get 5 percent of your daily carbs from this portion.