May 2, 2012 9:15
Archaeologists discovered a mummy Iceman Oetzi blood samples, placing in doubt the story of a quick death from falling arrows. The paper was published in the journal Journal of the Royal Society Interface. Summary results BBC News.
Despite the good safety mummies, scientists have not been able to find in Oetzi blood cells. Scientists believed that because of its brittleness all red cells in the blood vessels mummy had degraded. In this paper, the researchers were able to detect the blood samples, but not in the vessels, and in the wounds of arrows. To do this, the authors used atomic force microscopy.
The principle of operation of an atomic force microscope is a scanning microscope that investigated surface, just like a turntable needle slides on vinyl. As a result of such a scan is obtained a three-dimensional image of a very high resolution.
The scientists studied the wound occurred while arrows hit in the left shoulder, with the help of an atomic force microscope and found objects, much like the shape and size of red blood cells — the major blood cells. The experts examined the same samples using spectroscopy, which allowed the samples to detect the presence of fibrin — a protein involved in wound healing.
The number of detected fibrin was less than would be expected if the wound Oetzi was very fresh. Fibrin is present in fresh wounds, but eventually breaks down, so the results of the scientists say that Oetzi was wounded for some time (more than a day) to death.
Since its discovery in 1991, the cause of death of the old man who lived 5,300 years ago, tried to set a different group of researchers. Fathers on the body have been found traces of contact with the left shoulder arm, stab his hands, back injury with a solid object (probably a stone shot from a sling), and evidence of a strong blow to the teeth. Most scientists now tend to the version of a quick death due to blood loss from the arrow wound, but some scientists have expressed that the old man was buried in my tribe.
Oetzi is one of the most studied to date in the history of mummies. The experts found his age, occupation, eye color, defined sequence of nuclear and mitochondrial DNA, the paint that was used for the application of his tattoos, and even found out that the last time he ate for dinner.