Structure Characterization of Four New Sesquiterpene Pyridine Alkaloids from Hook. f. and Anti-Inflammatory Activity Evaluations.

Sesquiterpene pyridine alkaloids (SPAs), as a main class of components in Hook. f., possess a variety of bioactivities, such as immunosuppressive, insecticidal, and anti-tumor activities.

Comparative analyses of complete chloroplast genomes reveal interspecific difference and intraspecific variation of genus.

The genus was of great medicinal value and attracted much attention on the taxonomic study using morphological and molecular methods. In this study, we assembled 12 chloroplast genomes of to reveal interspecific difference and intraspecific variation. The sequence length (156,692-157,061 bp) and structure of were conserved.

[Spectral response measurement of FUV image intensifier].

It is possible to obtain some space weather parameters such as the electron flux and mean energy of the precipitating electrons from the far ultraviolet (FUV) radiance of the aurora observed in a nadir viewing geometry, and the FUV image intensifier is one of the key equipment that used for observation the FUV radiance of the aurora in a nadir viewing geometry. The capability of this equipment will affect the whole purpose of the detection. And the responsibility to the wavelength is the most important parameter of image intensifier.

[The study of aluminium diffuser calibration in the UV].

A bi-directional reflectance distribution function (BRDF) measurement setup in the ultraviolet spectral range was established. The BRDF of the aluminium diffusers at a given orientation was measured. The relative accuracy of the BRDF measurement is better than 2.