, 2005 关键物种的保护是维持黄河健康的重要措施之一。以黄河干流不同年代生物调查资料为依据,首先根据黄河干流各个河段水生生态系统的食物结构,计算水生生态系统中各类种群的关键性指数,比较各类种群的关键性指数的大小,识别出关键种群;然后计算种群中物种保护的次序,优先保护的物种就是关键物种。研究结果表明,鱼、北方铜鱼 ...
蒋晓辉,刘晓燕,张曙光,蔡庆华
core
[Ursolic acid in <i>Huajie Xiaoliu</i> Formula inhibits colorectal cancer cell growth by inducing cuproptosis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoJin C +7 more
europepmc +1 more source
5-取代黄酮醇的合成：Algar-Flynn-Oyamada 反应的选择性研究
, 2016 黄酮醇，即3-羟基黄酮，是一类重要的天然产物，广泛地存在于自然界多种植物中，具有许多重要的药物作用和生理活性，如抗氧化、保护心血管、抗炎、抗菌、抗病毒、抗癌等。由于黄酮醇在自然界中通常与结构类似物共存，分离获取这类化合物十分困难。现有化学合成方法大多存在原料制备难度大、反应条件苛刻、对底物适应性差等问题。Algar-Flynn-Oyamada （AFO）反应， 即查尔酮在NaOH 与H2O2 作用下生成黄酮醇的反应，以其反应原料易得，步骤少，操作简单，产率相对较高而成为目前最为普遍采用的合成方法 ...
周强
core
[An integrated electrical stimulation-drug iontophoresis-monitoring system for tendon injury repair]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiRui B, Guo X, Zhou Y, Zhuang C, Liu C.
europepmc +1 more source
, 1999 用中药黄精（Ｐｏｌｙｇｏｎａｔｕｍｓｐ．）中提取的多糖ＰＰ三种剂量连续灌胃老龄大鼠，于ｄ１５和ｄ３０进行迷宫测定，以检测黄精多糖对大鼠记忆获得和记忆再现的影响．结果显示：连续灌胃１５ｄ，黄精多糖能明显降低大鼠迷宫测试中的错误次数，显著提高大鼠学习和记忆能力；ｄ３０测试获同样结果，潜伏期测试表明能明显缩短潜伏期．另外ＰＰ对大鼠的体重变化无影响 ...
黄芳,陈桃林,蒙义文, 蒙义文
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[Therapeutic effects of natural products on animal models of chronic obstructive pulmonary disease]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanFei X +5 more
europepmc +1 more source
[Effect of astragaloside IV on osteogenic differentiation of BMSCs in osteoporotic rats via regulation of miR-21 and inhibition of the Notch signaling pathway]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanXiao J, Liu X, Huang J, Dou B.
europepmc +1 more source
[Experimental Study on Biomimetic Curcumin-Mediated Sonodynamic Therapy of Melanoma]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanRong X, Xiang X, Zhao Y, Qiu L, DU F.
europepmc +1 more source
[Sequential therapy with carglumic acid in three cases of organic acidemia crisis]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiChen YY +6 more
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[Deep eutectic solvent and improved needle filter-based liquid-membrane microextraction combined with high performance liquid chromatography for the determination of sulfonamide and fluoroquinolone residues in milk]. [PDF]
Se PuXu RM +5 more
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