What are the scientific processes to do with Stem Cell extraction/isolation etc?

The quality and quantity of the stem cells contained in the collected bone marrow are tested in the laboratories. First, the stem cells are isolated. Then a chromatographical procedure is used to separate them from the red and white blood corpuscles and plasma. The sample is tested under sterile conditions so that the stem cells which will be administered to the patient cannot be contaminated with viruses, bacteria or fungi. The sample is also tested for the presence of viral markers such as HIV, hepatitis B and C and cytomegalia. The entire process is documented and the concentrated stem cells are not released for administration until all quality criteria have been satisfied.





The cleaned stem cells are counted and vitality checks are made. If there are enough vital stem cells, i.e. more than two million CD34+ cells with over 80 percent vitality, the stem cell concentrate is approved for patient administration. The cells are stored in liquid nitrogen at -196 degrees Celsius until it is time for them to be used.What are the scientific processes to do with Stem Cell extraction/isolation etc?
as far as i know, only really two viable methods of extraction, stem cells are formed in your bone marrow, or in a fetus. Take it out with a needle, and keep the stem cells isolated or separate so that they remain stem cells. all cells 'stem' from stem cells, and later branch off into different variations (ie organs, blood, making you, etc)

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