In this paper, we consider the power variation of subfractional Brownian mo- tion. As an application, we introduce a class of estimators for the index of a subfractional Brownian motion and show that ...they are strongly consistent.
A promising gram-negative bacterial strain for the biodegradation of aniline as the sole carbon, nitrogen and energy sources was successfully isolated and identified as Delftia sp. XYJ6. The optimal ...temperature and pH for both the growth of Delftia sp. XYJ6 and the biodegradation of aniline were 30°C and 7.0, respectively. Initial aniline of 2000 mg·L-1 could be completely removed by the strain at 22 h, which showed that Delftia sp. XYJ6 had a strong ability in the biodegradation of aniline. It indicated that aniline was firstly converted to catechol catalyzed by aniline dioxygenase as a first product, which was then further biodegraded to cis,cis-muconic acid catalyzed by the catechol 1,2-dioxygenase of Delftia sp. XYJ6 as a second product. Cis,cis-muconic acid could also be further biodegraded to other small compound again. The pathway for the biodegradation of aniline by Delftia sp. XYJ6 was not previously reported.
Silica nanococoons with coiled or concentric circular pore channels in the walls attracted much attention, recently. However, the formation of them is not well illustrated. Herein, hollow silica ...shells with organized pore channels parallel to the shell surface were prepared through a single-templating method using the self-assemblies of a chiral low-molecular-weight amphiphile, L-18Phe6PyBr, as templates under a dilute concentration. These nano- cocoons were characterized using X-ray diffractometer and N2 sorption. The formation of them was clearly shown in the field-emission electron microscopy images which were taken at a low voltage. Moreover, transmission elec- tron microscopy images taken after different reaction times indicated a cooperative self-assemble mechanism. It was also found that the nanocoons were formed from coiled nanoribbons.
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