The direction of decrease in the ratio indicates the oil migration orientation, and the projection trajectory of the isopleths indicates the preferential oil filling pathways.
Open image in new window Fig. 9 Isopleth map of 4-/1-MDBT of the Ordovician oils showing the oil migration orientation and pathways in the Tuoputai region of the Tarim Basin, NW China.
Angles of proliferation, migration, orientation, and localization were calculated using Axiovision Angle3 software, and cilium length was measured using Zen software (Zeiss, Oberkochen, Germany).
Cell migration, orientation, and polarization share molecular mechanisms, and often the same proteins are involved in all three processes (Chen et al., 2008; Polleux et al., 2000; Shelly et al., 2011).
Based on both migration fractionation effects and differences in thermal stability of different isomers, DBTs and BNTs can be used to trace oil migration orientations and filling pathways.
It is concluded that relative parameters of DBTs and BNTs are practical molecular indicators for tracing oil migration orientations and filling pathways.
In this study, three geochemical indicators relating to DBTs and BNTs, namely; (1), 4-/1-methyldibenzothiophene (4-/1-MDBT); (2), total content of DBTs; and (3), benzo[b]naphtha[2,1-d]thiophene/(benzo[b]naphtha[2,1-d]thiophene+benzo[b]naphtho[1,2-d]thiophene benzo[b]naphtha[2,1-d]thiophene+benzo[b]naphtho[1,2-d]thiophene benzo[b]naphtha[2,1-d]thiophene+benzo[b]naphtho[1,2-d]thiophene
Based on the thermodynamic stabilities and molecular simulation, two trimethyldibenzothiophene molecular indicators, that is, 2,4,6-/(1,4,6 + 1,4,8 + 3,4,6 -trimethyldibenzothiophene (TMDBT) and (2,4,7 + 2,4,8)-/(1,4,6 + 1,4,8 + 3,4,6 -trimethyldibenzothiopheneTMDBTe position of methyl-substitute), were proposed to trand subsurface oil migration orientations and reservoir filling pathways.
It is a secreted protein that is involved in axonal outgrowth and migration orientation during the development of the central nervous system [ 14].
Netrin-4 is a secreted protein involved in neurite growth [ 8] and migration orientation during the development of the central nervous system [ 12, 23].
Birds also have been the primary group in the study of migration and orientation and the effect of hormones on behaviour and physiology.
