the population of the official roman empire at its peak was 70 million to more than 100 million compared to the world population.
the population of the official roman empire at its peak was 70 million to more than 100 million compared to the world population.
population of the official roman empire at its peak compared to the world population?
70 million to more than 100 million
Na
Na
the carbonyl end groups which are formed are usually aldehydes or ketones, which can oxidise further to carboxylic acids. the net result is a high concentration of elemental oxygen on the crack surfaces, which can be detected using energy-dispersive x-ray spectroscopy in the environmental sem, or esem. the spectrum at left shows the high oxygen peak compared with a constant sulfur peak. the spectrum at right shows the unaffected elastomer surface spectrum, with a relatively low oxygen peak compared with the sulfur peak.









































section::::prevention.
ozone cracking