Blood tests are very common. When you have routine checkups, your doctor may recommend blood tests to see how your body is working. Many blood tests don't require any special preparations. For some, you may need to fast (not eat any food) for 8 to 12 hours before the test. Your doctor will let you know how to prepare for blood tests. During a blood test, a small sample of blood is taken from your body. It's usually drawn from a vein in your arm using a needle. A finger prick also might be used.
Extraction of aluminium. Aluminium is the most abundant metal on Earth. Despite this, it is expensive, largely because of the amount of electricity used up in the extraction process. Aluminium ore is called bauxite.The bauxite is purified to yield a white powder, aluminium oxide, from which aluminium can be extracted.The extraction is done by electrolysis. But first the aluminium oxide must be made molten so that electricity can pass through it.nstead, it is dissolved in molten cryolite, an aluminium compound with a lower melting point than aluminium oxide. The use of cryolite reduces some of the energy costs involved in extracting aluminium. Diagram showing cell for aluminium extraction. The diagram shows an aluminium oxide electrolysis tank.
Article Summary: DNA extraction is the process in which DNA is isolated from other cellular components through certain procedures. It has its applications in forensics.... DNA extraction is a procedure of isolating the DNA from other cellular components for the molecular or forensic analysis.Usually a machine is used to extract DNA from the cell that is called as Bead Beater. It breaks the cell and extracts the DNA from it.el Box is another machine which separates the sequences of DNA in the gel. An electric current is used for this purpose. In the end, centrifugation separates the DNA from the solution through spinning. Purpose of DNA Extraction:- Extraction of DNA is an important step in the diagnosis use.