Question type: Shopping & Pricing. I'm looking at buying a 2011 BMW 335 Manufacturer buyback that was originally from California. I've gotten over the stigma of buying a buyback,' since the car has been repaired by BMW, is still under warranty and the price is a lot closer to what I'm willing to spend. The reason it was bought back was for an extended crank issue, which has been completely resolved.
Do you think we can use the flame test to determine the identity of unknown in a mixture? Why or why not? I think that the flame test could be used to determine the identity of unknowns in a mixture, however it would not be very effective. This is because if there are to many different compounds, or elements, all of the colors of light mixed together would bring the flame closer to just emitting white light.
HIV tests are used to detect the presence of the human immunodeficiency virus (HIV), the virus that causes acquired immunodeficiency syndrome (AIDS), in serum, saliva, or urine. Such tests may detect antibodies, antigens, or RNA. CD4 count does not check for the presence of HIV. It is used to monitor immune system function in HIV-positive people. Declining CD4 T-cell counts are considered to be a marker of progression of HIV infection. A normal CD4 count can range from 500 cells/mm3 to 1000 cells/mm3.