Subjects: Digital Publishing >> New Media submitted time 2023-10-08 Cooperative journals: 《中国传媒科技》
Abstract：
Subjects: Biology >> Botany >> Applied botany submitted time 2023-07-13 Cooperative journals: 《广西植物》
Abstract： In order to investigate the diterpenoid components from the leaves of Pieris japonica and their acetylcholinesterase inhibitory activities, with the aid of thin-layer chromatography color characteristics, silica gel, MCI and semi-preparative high-performance liquid chromatography technology, the target constituents were isolated and purified. The structures of the obtained compounds were identified by analyses of their spectral data (NMR and MS) and comparison of their data with those of reported in the literature. Meanwhile, the human acetylcholinesterase (hAChE) inhibitory effects of obtained diterpenoids were evaluated for the first time by a ellman method. The results showed that eight diterpenoid compounds were isolated and identified from the leaves of Pieris japonica, namely pieriformoside F (1), 3-epi-grayanotoxin XVIII (2), 3-epi-grayanotoxin B (3), asebotoxin-X (4), pieriformosin B (5), gayanotoxine-V (6), rhodojaponin III (7), and pieriformosin C (8). Among them, compound 1 was isolated from this plant for the first time, and compound 8 showed AChE inhibitory activity. In conclusion, Pieris japonicat is rich in diterpenoids and bioactive components, which provides a certain theoretical basis for its further development and utilization.
Subjects: Astronomy >> Astrophysical processes submitted time 2017-09-26 Cooperative journals: 《天文研究与技术》
Abstract：海量观测数据及次生数据的高效存储与检索，天文大数据的快速及时处理，加速天文学研究的科学产出等问题，已成为天文观测和天文研究迫切需要解决的难题。以信息技术为支撑的天文大数据的高效分析和处理，帮助天文学家重新审视和了解宇宙。虚拟天文台的出现为全球范围内研究资源的无缝透明连接提供了协议、标准，以协议为基拙规范了天文数据的发布与检索方式。以国内外现有的观测设备为基拙，综述目前主流天文机构的数据发布与检索相关情况。
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