Examlex
Exhibit 4-1
The preservation of objects made of organic material is a constant concern to those caring for items of historical interest. For example, some delicate fabrics are natural silks--they are made of protein and are biodegradable. Many silks in museum collections are in danger of crumbling. It would be of great benefit to be able to assess the delicacy of the fabric before making decisions about displaying it. One possibility is chemical analysis, which might give some evidence about the brittle nature of a fabric. To investigate this possibility, bio-chemical data in the form of a ratio of the amount of certain amino acids in the fibers was acquired from the linings of sixteen 19th and early 20th century Japanese kimonos, and the tenacity (breaking stress) of the fabric was also recorded.
Using the data from the Japanese kimonos, construct the least squares best fit line predicting tenacity using amino acid ratio as a predictor.
-Refer to Exhibit 4-1.
Approximately what proportion of the variability in tenacity is explained by the amino acid ratio?
Reaction
A process in which chemical substances convert to other substances through the breaking and forming of chemical bonds.
Synthetic Steps
The individual reactions or processes that are performed in sequence to synthesize a desired chemical compound from simpler starting materials.
PCC
Pyridinium chlorochromate, a reagent used in organic chemistry for the oxidation of primary and secondary alcohols to aldehydes and ketones, respectively.
Magnesium Bromide
A chemical compound consisting of magnesium and bromine, often used in organic synthesis as a reagent or catalyst.
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