25-01-2006, 12:47 PM
Citat: "Rats were implanted with a low dose (4 pellets) or a high dose (20 pellets) of tungsten alloy. Other rats received 20 pellets of nickel, a known carcinogen, or tantalum, an inert control metal. In findings that surprised the researchers, 100% of the rats implanted with tungsten-alloy pellets developed extremely aggressive tumors surrounding the pellets, although tumor growth was slower in rats implanted with lower doses. The tumors then rapidly metastasized to the lungs of the rats, necessitating euthanasia of the animals well before the anticipated end of the study."
Det drejer sig som nævnt om en legering der bl.a. indeholder cobolt der har vist sig at kunne gi' cancer. Se nedenstående.
Citat: Nonradioactive cobalt has not been found to cause cancer in humans or animals following exposure in food or water. Cancer has been shown, however, in animals that breathed cobalt or when cobalt was placed directly into the muscle or under the skin. Based on the laboratory animal data, the International Agency for Research on Cancer (IARC) has determined that cobalt and cobalt compounds are possibly carcinogenic to humans.
Mht. tungsten-legeringen er der en del diskussion om hvilke stoffer der reelt er årsag til canceren. Det der giver anledning til bekymring eller undren hos forskerne er at tungsten ser ud at katalysere canceren når det kombineres med cancerfremkaldende metaller.
Det drejer sig som nævnt om en legering der bl.a. indeholder cobolt der har vist sig at kunne gi' cancer. Se nedenstående.
Citat: Nonradioactive cobalt has not been found to cause cancer in humans or animals following exposure in food or water. Cancer has been shown, however, in animals that breathed cobalt or when cobalt was placed directly into the muscle or under the skin. Based on the laboratory animal data, the International Agency for Research on Cancer (IARC) has determined that cobalt and cobalt compounds are possibly carcinogenic to humans.
Mht. tungsten-legeringen er der en del diskussion om hvilke stoffer der reelt er årsag til canceren. Det der giver anledning til bekymring eller undren hos forskerne er at tungsten ser ud at katalysere canceren når det kombineres med cancerfremkaldende metaller.