ライフサイエンスコーパス: asphaltene

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1 ed using 6.461 keV radiation for a petroleum asphaltene.

2 s and aromatics, but increases in resins and asphaltenes.

3 sis of large nonvolatile analytes, including asphaltenes.

4 of especially challenging analytes, such as asphaltenes.

5 of catalytic hydroprocessing, "heavy ends" (asphaltenes) analysis, corrosion, etc.

6 oils that generally present high amounts of asphaltenes and resins.

7 Ozone attack on resins, asphaltenes, and soil organic matter led to the producti

8 ty in toluene and insolubility in n-heptane, asphaltenes are a highly aromatic, polydisperse mixture

9 Although asphaltenes are critically important to the exploitation

10 Asphaltenes are identified as the major source of sulphu

11 L2MS mass spectra of asphaltenes are insensitive to laser pulse energy and ot

12 itial absorbance of the oil is measured, and asphaltenes are removed from the oil by the addition of

13 distribution and cross sections of petroleum asphaltene (ASPH) and deasphaltened oils (DAO).

14 The aromaticity and asphaltene average molar mass are also correlated with I

15 ion technique, where it was established that asphaltene coloration correlated linearly with asphalten

16 Asphaltenes constitute the heaviest, most polar and arom

17 apparatus and method for the measurement of asphaltene content in crude-oil samples.

18 (maltenes) is then measured, and the initial asphaltene content is revealed by the change in absorban

19 microfluidic approach described here permits asphaltene content measurement in less than 30 min as op

20 It is thought that in nanoaggregate form, asphaltenes create elastic layers around water droplets

21 monstrated with the analysis of black shale, asphaltene, crude oil and kerogen samples.

22 ted from the digested solution (black shale, asphaltene, crude oil and kerogen) by extraction in isoo

23 ueous IFT of the tars, as well as resins and asphaltenes extracted therefrom, were measured over a ra

24 nty to physico-chemical heterogeneity of the asphaltene fraction driven by variation in molecular siz

25 n resonance mass spectrometer to analyze the asphaltene fraction of a crude oil.

26 We treated asphaltenes from North and South American crude oils wit

27 Here we report asphaltene mass spectra recorded with two-step laser mas

28 s contribute to a long-standing debate about asphaltene molecular architecture.

29 and other parameters, demonstrating that the asphaltene molecular weight distribution can be measured

30 e the controversy from LDI, showing that the asphaltene molecular weight distribution peaks near 600

31 tunnelling microscopy to study more than 100 asphaltene molecules.

32 idal analysis shown to successfully identify asphaltene nanoaggregation in toluene.

33 The asphaltene optical densities correlated linearly with co

34 ion renders it an attractive method to study asphaltene phase properties.

35 The complexity and range of asphaltene polycyclic aromatic hydrocarbons are establis

36 exity, the solid component of crude oil, the asphaltenes, poses an exceptional challenge for structur

37 s of organic radicals were distinguished: an asphaltene radical species typically found in crude oil

38 Pure asphaltene radicals are resonance stabilized over a poly

39 A petroleum asphaltene sample is fractionated by a silica-gel cyclog

40 ed to obtain the bulk characteristics of the asphaltene sample.

41 oils into saturates, aromatics, resins, and asphaltenes (SARA), followed by effect-directed analyses

42 containing saturates, aromatics, resins, and asphaltenes (SARA), was partially oxidized, resulting in

43 onene, graphite, and paraffin standards, the asphaltene spectrum is seen to be composed of contributi

44 as represented in the "archipelago model" of asphaltene structure.

45 erformed to investigate the coupling between asphaltene structures and velocity measurements and thei

46 phaltene coloration correlated linearly with asphaltene weight content.

47 most classes of polar compounds, except for asphaltenes, which exhibited lower recoveries (82%) due

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