mucous-membrane
发表于 2025-3-30 09:10:52
s found to be approximately 76 ppm, thus ruling out U minerals. In SRC I it was established that Ti, V, As, Ga, Fe, Zn, and Se showed distinct organic affinity and that these elements were probably present as metal-organic complexes or complexed in the asphaltene or preasphaltene structure. The natu
宴会
发表于 2025-3-30 13:18:43
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在驾驶
发表于 2025-3-30 20:07:25
,Selbstarchäologie als Ich-Arbeit, TTFA have shown it to be able to produce elemental profiles of the mineral phases in coal (8). An advantage of TTFA is its ability to produce reliable quantitative results with a minimun of prior knowledge. In order to further explore the utility of this approach, a data set consisting of physicall
compose
发表于 2025-3-30 21:11:53
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arrhythmic
发表于 2025-3-31 01:49:55
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高兴一回
发表于 2025-3-31 08:28:38
Royston H. Filby,B. Stephen Carpenter,Richard C. R
Torrid
发表于 2025-3-31 10:15:51
Atomic and Nuclear Methods in Fossil Energy Research978-1-4684-4133-8
凹处
发表于 2025-3-31 14:43:42
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全部
发表于 2025-3-31 18:33:56
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常到
发表于 2025-3-31 23:27:04
Uranium Content of Petroleum by Fission Track Technique of this technique to petroleum is briefly described and discussed critically. The results obtained thus far indicate uranium concentrations in samples of brazilian petroleum which are over the detection limit of the fission track technique.