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野薄荷叶腺毛的发育形态学研究 总被引:6,自引:1,他引:5
研究了分布于我国东北部的野薄荷叶表面腺毛的结构和发育。主要腺毛有两种:多细胞盾状腺毛和弯曲单细胞头状腺毛。多细胞盾状腺毛由1个基细胞,1个柄细胞和一个由8-12个分泌细胞构成的头部组成。单细胞头状腺毛由1个基细胞,1个柄细胞和一个分泌细胞头部构成。 相似文献
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用水蒸气蒸馏法得到紫苏挥发油 ,进行抑菌以及抑制超氧阴离子自由基的实验。结果表明 :紫苏挥发油对红色毛癣菌 ,石膏样小孢子癣菌 ,絮状表皮癣菌有较好的抑菌作用 ,并能有效的抑制O ·2 的生成 相似文献
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紫苏、白苏的抑菌实验 总被引:14,自引:2,他引:12
用不同溶剂浸泡或处理紫苏后,进行抑菌实验,结果表明:10%以上浓度的紫苏水浸液,12.5%水煎液和乙醇提取液对白色念球菌、新型隐球菌以及红色毛癣菌、石膏样小孢子癣菌、絮状表皮癣菌有较好的抑菌效果。紫苏、皱紫共、白苏对真菌均有抑菌作用,但皱紫苏对绿脓杆菌、白苏对克柔氏念球菌、白色念球菌以及绿脓杆菌效果更为明显。 相似文献
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Eui-Baek Byun Eun-Ji Cho Yi-Eun Kim Woo Sik Kim 《Bioscience, biotechnology, and biochemistry》2018,82(8):1344-1358
This study was carried out to evaluate the neuroprotective activity of polysaccharide extracts isolated from Perilla frutescens (PEPF) in H2O2-treated HT22 hippocampus cells. The PEPF treatment was found to increase the anti-oxidant activities of HT22 hippocampus cells. PEPF treatment resulted in a significant protection of HT22 hippocampus cells against H2O2-induced neurotoxicity, this protection ultimately occurred through an inhibition of ROS-mediated intracellular Ca2+ levels leading to MAPKs and NF-κB, as well as the accumulation of PI3K/AKT and Nrf2-mediated HO-1/NQO1 pathways. Furthermore, PEPF not only decreased the expression of Bax, cytochrome c, and cleaved caspases-3, -8, and -9, but also increased the expression of PARP and Bcl-2 in the H2O2-treated HT22 hippocampus cells, which overall contributed to the neuroprotective action. PEPF retains its mitochondrial membrane potential and reduces the elevated levels of sub-G1 phase and apoptotic morphological features induced by H2O2. It also reduces the malondialdehyde levels and enhances the intracellular SOD activity. 相似文献
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