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Abstract: Fertilized hen eggs are traditionally considered as dietary supplements in many Asian countries. This work aimed to obtain information on antioxidant peptides derived from fertilized eggs. Antioxidant activities were evaluated by measuring reducing power, DPPH radical scavenging activity and inhibition of pyrogallol autoxidation. During 15days of incubation, the antioxidant activity of peptides increased with increasing incubation time. The peptides on day 15 were employed for isolation of antioxidant peptide. An antioxidant peptide, HLFGPPGKKDPV (MW: 1291.51Da), was purified by consecutive chromatographic methods. The purified peptide was a novel peptide corresponding to the fragment 302–313 of ovotransferrin. The conformational prediction and Fourier transform infrared spectroscopy suggested that the peptide existed in β-sheet. Furthermore, the peptide showed an inhibition ratio of 60.20% on linoleic acid autoxidation and an inhibitory effect on ABTS radicals (IC50: 312μM). These results suggested that fertilized eggs could be explored as a source of antioxidant peptides. [Copyright &y& Elsevier]

The FORMOSAT-3/COSMIC (F3/C) radio occultation (RO) technique vertically scans the atmosphere from 0 to 800 km altitude over eastern Asia and the Pacific Ocean during the 2011 Mw9.0 Tohoku earthquake and tsunami. The mean wavelet spectra derived from dozens of atmospheric and ionospheric RO sounding profiles within ten hours after the earthquake illustrate that the atmospheric oscillations with a vertical wavelength ranging from 0.5 to 8 km and from 10 to 40 km, respectively, appear in the stratosphere and ionosphere within 6 hours after the earthquake initial rapture. The vertical wavelength estimated from the atmospheric gravity wave dispersion relation is compared with the observed vertical wavelength. The small-scale gravity waves may not be easy to reach the upper ionosphere. These RO-observed long-lasting atmospheric and ionospheric oscillations may consist of the earthquake/tsunami wavefront and its residual oscillatory tail. The results suggest that the RO technique is a powerful tool which is suitable for probing earthquake/tsunami-induced oscillations in the atmosphere, and allow a more comprehensive understanding of the excitation, propagation, and dissipation of earthquake/tsunami-induced gravity waves in the entire atmosphere. [ABSTRACT FROM AUTHOR]