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Polygonumnolides A1–B3, minor dianthrone derivatives from the roots of Polygonum multiflorum Thunb
Jianbo Yang,Zheng Yan,Jin Ren,Zhong Dai,Shuangcheng Ma,Aiguo Wang,Yalun Su 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.6
Seven new dianthrone glycosides, named polygonumnolidesA1–B3 (1–7), were isolated from the 70 %EtOH extract of the dried roots of Polygonum multiflorumThunb. using column chromatography and preparativehigh-performance liquid chromatography. Their structureswere determined by 1D and 2D NMR and mass spectroscopy. The isolated compounds were evaluated for theircytotoxic effects against KB tumor cell lines and compounds1–4 showed moderate cytotoxicity.
Changrong Liu,Hongbin Tan,Aiguo Zheng,Xiangmei Kang,Ao Jiang,Rui Fang,Haorong Ren,Wanwei Fang 한양대학교 세라믹연구소 2020 Journal of Ceramic Processing Research Vol.21 No.3
The manufacture of sodium sulfide through a carbon reduction process, using sodium sulfate as raw material, generatessodium sulfide by-product sediment, which has potential health and environmental impacts. Herein, a novel strategy isproposed to recover sodium oxide from the sediment by using acidic treatment and the influence of solution pH on sodiumoxide content is systematically studied. The results reveal that the sodium oxide content decreases with decreasing pH valueof the solution. At pH = 4, the as-treated sediment results in Na2O content of 3.10 wt. %, which recovery rate is about 90%. Furthermore, the influences of sintering temperature and time on compressive strength and bulk density are studied. Ingeneral, the compressive strength and bulk density increase with increasing sintering temperature and time. After sinteringat 1,300 oC for 120 min, the compressive strength and bulk density of the sintered porous ceramic are 26.66 MPa and 1.31 g/cm3, respectively. The porous ceramic, sintered at 1,300 oC, mainly consists of hauyne, gehlenite and hematite phases. Insummary, the few flaws in cell-walls result in high compressive strength of the as-prepared porous ceramics.