坛紫菜(Porphyra haitanensis)叶状体细胞对4种有机溶剂的敏感性比较

分析了坛紫菜叶状体细胞对甲醇、乙醇、异丙醇、1，3-丙二醇等4种有机溶剂的敏感性．结果表明：体细胞对1，3-丙二醇敏感．在实验最低剂量(0．2μL／mL)下对紫菜体细胞就表现出较强的致死作用；对甲醇有较强的耐受性．在最高的1．0μL／mL处理浓度组．生长发育状况与对照组无明显差别；乙醇在浓度高于0.6μL／mL时强烈抑制体细胞的分裂；异丙醇随着浓度的升高表现出使体细胞向细胞团方向分化．而叶状体的形成则受到抑制．本实验结果表明．在用外源化合物处理紫菜叶状体细胞时．甲醇在1．0μL／mL浓度范围内可作为合适的有机溶剂。     

7种植物提取物对几种病菌生物活性的初步研究

以7种植物丙酮提取物为材料,测定了其对几种病菌的生物活性.结果表明:在供试质量浓度为0.1g／mL时,马尾松粗提物对杨树溃疡病菌和番茄早疫病菌的菌丝生长抑制率均在60％以上,对其它3种病菌的抑制率均在50％左右.马尾松作为植物源杀菌剂值得进一步研究.     

穿山龙提取物的抗氧化作用研究

采用热水煮提法和稀碱提取法分别从穿山龙中提取出水溶性提取物DM和ADM.利用超氧阴离子清除实验,羟自由基清除实验和邻苯三酚自氧化抑制实验研究DM和ADM的抗氧化活性,结果表明DM有较强的抗氧化活性,可被作为潜在的抗氧化剂开发利用.     

几种植物提取液对根结线虫的抑杀作用

采用浸渍生测法测定了一些外来有害植物以及本地常见植物提取液11种对南方根结线虫(Meloidogyne incog-nita)的毒杀作用,结果表明:马缨丹、烟草、一枝黄花、冬青等5种植物提取物的抑杀作用都很强,均有95%以上的校正死亡率.且每种植物不同部位的杀线活性物质的含量不一样.同时盆栽实验结果表明:夹竹桃、马缨丹、苦楝等4种植物提取物对线虫的抑杀作用很明显,而且对卵块孵化的抑制率也很高.     

决明子提取物降脂作用的研究

探讨决明子溶剂分部提取物实验性高脂血症大鼠血脂的影响。将大鼠制成高脂血症模型，以多烯康为阳性对照，测定决明子粉及其不同溶剂的提取物给药后，对高脂血症大鼠的血清总胆固醇（TC）、甘油三酯（TG）、高密度脂蛋白（HDL）和低密度脂蛋白（LDL）含量的影响。结果显示决明子粉、乙酸乙酯提取物、正丁醇提取物、乙醇提取物和水提取物均可使高脂血症大鼠的TC明显降低（P＜0.05或P＜0.01)；且能显著升高HDL水平（P＜0.05或P＜0.01)。表明决明子溶剂分部提取物的降脂作用随提取溶剂极性的增大而增强。推测决明子中能有效降低血脂的主要成分可能是甙类、蛋白质、多糖等成分。     

Nicotiana ovule extracts in duce nuclear reconstitution of demembranated Xenopus sperm in cell-free system

s Nicotiana tabaccum ovule extracts induced nuclear reconstitution of demembranated Xenopus leavis sperm in a ceil-free system. Demembranated Xenopus sperm began to swell after 15 rmin of incubation with Nicotiana ovulde extracts. Accompanying the process of incubation,Xenopus sperm decondensed and their shapes changed gradually from long and ellipse to round. The completely decondensed chromatin was surrounded with membrane structure, which was a mixture envelope of a double membrane and a single membrane. Nucleosome assembly was verified by means of micrococcal nuclease digestion to reconstituted nuclei and DNA electrophoresis. Nicotiana ovule extracts supplied one more experimental model and system.The new system could promote powerfully the research on mechanisms of cell division and cell cycle regulation.     

Nicotiana ovule extracts induce nuclear reconstitution of demembranated Xenopus sperm in cell-free system

Nicotiana tabaccum ovule extracts induced nuclear reconstitution of demembranated Xenopus leavis sperm in a cell-free system. Demembranated Xenopus sperm began to swell after 15 min of incubation with Nicotiana ovule extracts. Accompanying the process of incubation, Xenopus sperm decondensed and their shapes changed gradually from long and ellipse to round. The completely decondensed chromatin was surrounded with membrane structure, which was a mixture envelope of a double membrane and a single membrane. Nucleosome assembly was verified by means of micrococcal nuclease digestion to reconstituted nuclei and DNA electrophoresis. Nicotiana ovule extracts supplied one more experimental model and system. The new system could promote powerfully the research on mechanisms of cell division and cell cycle regulation.     

臭椿皮提取物体内抗肿瘤作用的实验研究

实验观察了臭椿皮不同溶剂提取物对小鼠移植性肿瘤的影响，结果表明臭椿皮水提取物对S180、H22的抑制率分别达35．07％、39．79％，臭椿皮乙醇和氯仿提取物对瘤谱具有选择性。     

乙醇—水体系的间歇萃取精馏

为了实现对废液中的乙醇回收再利用,对乙醇含量较低的乙醇水溶液的间歇萃取精馏过程中的塔釜加热温度、混合溶液的浓度、回流比等进行了实验研究。得出了主要参数和产品纯度影响因素之间的一些关系。结果满意,为废液中乙醇的回收提供了有价值的实验依据。     

啤酒花浸膏液态CO_2萃取试验研究

阐述了开发生产国产液态ＣＯ２酒花浸膏的重要性和必要性,测定了酒花浸膏在超临界及液态ＣＯ２中的溶解度,研究了原料类型、原料含水率及ＣＯ２流量等因素对液态ＣＯ２萃取酒花浸膏效果的影响