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Akademický článek

Chemical constituents and cytotoxic activity of Ludwigia octovalvis

Autor: ZENG Yuxian, LIAO Guangfeng, LI Jinling, LI Min, LI Bing, ZHU Xiaoyong, LU Rumei

Publikováno v: Guangxi Zhiwu, Vol 44, Iss 6, Pp 1195-1204 (2024)

To study the chemical constituents of Ludwigia octovalvis, the 80% ethanol extract from L. octovalvis was isolated by silica gel, Sephadex LH-20, Flash C18 and semi-preparative liquid chromatography, and the structures of obtained compounds were iden

Externí odkaz: https://doaj.org/article/8b0fff3472d64788a5316546f5a32b49

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Akademický článek

Numerical simulation of backfilling buried pipe trenches crossing oblique reverse faults with foam concrete

Autor: LI Jinling, WANG Qiang

Publikováno v: You-qi chuyun, Vol 41, Iss 12, Pp 1464-1469 (2022)

The backfilling material of pipe trenches is very important to ensure the safety of buried pipelines. Due to its small self-weight, controllable strength and self-compaction property, foam concrete is a preferred choice for backfilling buried pipe tr

Externí odkaz: https://doaj.org/article/1b742c773ebe40eba6c67732d85d994d

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Report

VLBI Astrometry of Radio Stars to Link Radio and Optical Celestial Reference Frames: Observing Strategies

Autor: Zhang, Jingdong, Zhang, Bo, Xu, Shuangjing, Liu, Niu, Chen, Wen, Ding, Hao, Jiang, Pengfei, Sun, Yan, Wang, Jinqing, Cui, Lang, Wen, Shiming, Mai, Xiaofeng, Li, Jinling, Shu, Fengchun, Huang, Yidan

The Gaia celestial reference frame (Gaia-CRF) will benefit from a close assessment with independent methods, such as Very Long Baseline Interferometry (VLBI) measurements of radio stars at bright magnitudes. However, obtaining full astrometric parame

Externí odkaz: http://arxiv.org/abs/2403.04141