What does preasphaltenes mean?

preasphaltenes

Word Rarity Very rare

Frequency: Zipf frequency 0.00 in modern English

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noun

"The values of 0.14 and 0.07 mmole/gram are comparable in magnitude to the range of 0.20 to 1.66 mmol/gram of carbonyl groups reported in the asphaltenes and preasphaltenes isolated from lignite coal liquefaction products, also calculated through increases in elemental nitrogen contents upon oximation [54 ]."

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