Improperly canned or home-prepared foods are common sources of the toxin that can result in foodborne botulism. Wound botulism results from contamination of a wound with toxin-producing C botulinum. Foodborne botulism and wound botulism occur predominantly in adults and are the focus of this article.C botulinum is an anaerobic gram-positive rod that survives in soil and marine sediment by forming spores.mproperly canned or home-prepared foods are common sources of the toxin that can result in foodborne botulism. Wound botulism results from contamination of a wound with toxin-producing C botulinum. Foodborne botulism and wound botulism occur predominantly in adults and are the focus of this article.
Scientists can not find the exact age of fossils. They use radioactive measures estimates of sedimentation and index fossils to date other fossils. The closest scientists can come to an exact date for a fossil is Carbon 14 dating. However since Carbon 14 has a half life of about 5,600 years Carbon 14 dating can only be used to date very recent fossils.
Older fossils cannot be dated by carbon-14 methods and require radiometric dating. Scientists can use different chemicals for absolute dating: 1  The best-known absolute dating technique is carbon-14 dating, which archaeologists prefer to use.2  However, the half-life of carbon-14 is only 5730 years, so the method cannot be used for materials older than about 70,000 years.ossil dating is accurate since the method follows strict scientific guidelines: 1  the age of rocks around a fossil can be considered. 2  mathematical calculations are used. 3  the state of decay, carbon-14, and isotopes figure in calculations. 4  tree of life relationships often help sort the dates.