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The wonderful property of isochron methods is: if one of these requirements is violated, it is nearly certain that the data will indicate the problem by failure to plot on a line.
(This topic will be discussed in much more detail below.) Where the simple methods will produce an incorrect age, isochron methods will generally indicate the unsuitability of the object for dating.
The better the fit of the data to the line, the lower the uncertainty.
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There is no good way to tell how close the computed result is likely to be to the actual age.Whether there's a data point on the Y-axis or not, the Y-intercept of the line doesn't change as the slope of the isochron line does (as shown in Figure 5).Therefore, the Y-intercept of the isochron line gives the initial global ratio of could be subtracted out of each sample, and it would then be possible to derive a simple age (by the equation introduced in the first section of this document) for each sample.Consider some molten rock in which isotopes and elements are distributed in a reasonably homogeneous manner.
Food Product Dating. What is open dating? “Open Dating” use of calendar date as opposed to a code on a food product is a date stamped on a product's package to help the store determine how long to display the product for sale. It can also help the purchaser to know the time limit to purchase or use the product at its best.… continue reading »
What is Dating? "Open Dating" use of a calendar date as opposed to a code on a food product is a date stamped on a product's package to help the store determine how long to display the product for sale. It can also help the purchaser to know the time limit to purchase or use the product at its best quality. It is not a safety.… continue reading »
Food Product Dating What do those dates mean? Extension Consumer Food Safety Fact Sheet. Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Most consumers don't want to serve “outdated” food to their families, but they also don't want to throw food away unnecessarily.… continue reading »
Am J Health Syst Pharm. 2000 Aug 1;57151441-5. Revised USP standards for product dating, packaging, and temperature monitoring. Okeke CC1, Bailey L, Medwick T, Grady LT. Author information 1General Policies Requirements, Nomenclature, and Labeling Division, United States Pharmacopeia, Rockville, MD.… continue reading »