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我国植物提取物的应用现状及发展策略 总被引:1,自引:0,他引:1
《医药中间体及其化工原料》2004,(3):26-28
天然药物(包括植物药、动物药)和生物工程药已成为21世纪最热门的药物。一方面,随着社会的发展,人类疾病谱已悄然发生改变,医疗模式已由单纯的疾病治疗转变为预防、保健、治疗、康复相结合的模式,各种替代医学和传统医学正在发挥着越来越大的作用,人类“回归自然”的呼声越来越高,使传统医药倍受青睐。另一方面,我国加入WT0组织后,中国医药市场融入国际医药市场的广度和深度将进一步增加。 相似文献
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随着具有成本优势的中国生产商竞争力的加强,西方精细化学公司的处境越来越艰难。印度生产商则缓慢但又稳固地建立起了自己的业务,向欧洲和美国制药公司供应高级制药成份和更为基础的制药中间体。 相似文献
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4种植物提取物对植物病原菌的抑菌作用 总被引:10,自引:1,他引:10
采用生长速率法和悬滴法测定了苦参、牛膝菊、独角莲、蔓陀萝4种植物的丙酮提取物对水稻恶苗病菌、稻瘟病菌、玉米小斑病菌、玉米弯孢菌叶斑病菌、番茄叶霉病菌和辣椒根腐病菌的生物活性。研究结果表明:在质量浓度为0.10g/ml下,苦参根提取物对几种供试菌的菌丝生长抑菌率均高于50%,对番茄叶霉病菌的抑制率高达88.57%,对6种供试病原真菌孢子萌发的抑制率均高于70%,对稻瘟病菌、玉米弯孢菌叶斑病菌和番茄叶霉病菌的孢子萌发抑制率为100%;独角莲对稻瘟病菌、玉米弯孢菌叶斑病菌和番茄叶霉病菌的孢子萌发抑制率分别为89.51%、96.00%和99.50%。 相似文献
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9种植物提取物对植物病原真菌的生物活性筛选 总被引:1,自引:0,他引:1
以苹果腐烂病菌、小麦赤霉病菌、苹果轮纹病菌、棉花枯萎病菌、柑橘炭疽病菌和黄瓜枯萎病菌为供试菌种。采用菌丝生长速率法测定了9种植物乙醇提取物对6种植物病原真菌的抑制作用,结果表明,浓度为5mg/mL时,荆条花乙醇提取物对6种植物病原真菌均有一定程度的抑制作用,其中对苹果腐烂病菌、棉花枯萎病菌、苹果轮纹病菌和黄瓜枯萎病菌的抑菌率分别为91.07%、72.97%、64.54%和63.20%。采用抑制孢子萌发法测定了9种植物乙醇提取物对2种植物病原真菌的抑制作用,结果表明,浓度为20mg/mL时,雪松叶和仙鹤草叶乙醇提取物对黄瓜枯萎病菌和柑橘炭疽病菌的孢子抑制率为100%。 相似文献
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随着环氧乙烷项目的迅猛发展,其与日增多的产量很大程度上缓解了市场的需求。同时,这种快速增长的形势对其下游产品更深更广的发展将起到重要的直接推动作用,目前环氧乙烷下游产品逐渐集中在乙醇胺系列、聚乙二醇系列、传统的AEO和TX系列以及新兴的减水剂系列等。通过对当前乙氧基化项目情况的分析,预测未来乙氧基化的发展格局。 相似文献
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Obesity is a global health problem. It is also known to be a risk factor for the development of metabolic disorders, type 2 diabetes, systemic hypertension, cardiovascular disease, dyslipidemia, and atherosclerosis. In this study, we screened crude extracts from 400 plants to test their anti-obesity activity using porcine pancreatic lipase assay (PPL; triacylglycerol lipase, EC 3.1.1.3) in vitro activity. Among the 400 plants species examined, 44 extracts from plants, showed high anti-lipase activity using 2,4-dinitrophenylbutyrate as a substrate in porcine pancreatic lipase assay. Furthermore, 44 plant extracts were investigated for their inhibition of lipid accumulation in 3T3-L1 cells. Among these 44 extracts examined, crude extracts from 4 natural plant species were active. Salicis Radicis Cortex had the highest fat inhibitory activity, whereas Rubi Fructus, Corni Fructus, and Geranium nepalense exhibited fat inhibitory capacity higher than 30% at 100 μg/mL in 3T3-L1 adipocytes, suggesting anti-obesity activity. These results suggest that four potent plant extracts might be of therapeutic interest with respect to the treatment of obesity. 相似文献
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阐述了新疆的炼厂乙烯原料及油田乙烯原料资源,探讨了新疆的乙烯工业发展。认为应尽量减少新疆乙烯工业布点,应优先考虑扩能改造中国石油独山子石化分公司的乙烯装置,使中国石油独山子石化分公司具备500kt/a以上的乙烯生产能力,把独山子建成新疆的以乙烯工业为中心的国家石油化工基地。 相似文献
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C. Banias V. Oreopoulou C. D. Thomopoulos 《Journal of the American Oil Chemists' Society》1992,69(6):520-524
The antioxidant activities of combinations of plant extracts and primary antioxidants or citric acid were studied in lard
stored at 75°C. Methanol extracts of oregano, thyme, marjoram, dittany, rosemary and sage were used. When combined with butylated
hydroxyanisole, butylated hydroxytoluene or ascorbyl palmitate the extracts showed an additive antioxidant effect, while combinations
with propyl gallate did not increase the induction period obtained by the phenolic antioxidant. Negative synergism was observed
when the plant extracts were mixed with DL-α-tocopherol. Citric acid showed a high synergistic efficiency with marjoram extract
and a minor one with thyme extract, but it had a negative effect with all the others. Ternary mixtures of the plant extracts
with citric acid and ascorbyl palmitate had lower activity than the corresponding dual combinations with ascorbyl palmitate,
except for the mixture of marjoram extract. 相似文献
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分别以中草药丁香、山茱萸、地榆和乌梅的提取液为还原剂和保护剂合成银纳米颗粒,利用紫外-可见吸收光谱(UV-vis)、透射电镜(TEM)以及X射线粉末衍射(XRD)对产物进行了表征。结果表明,所得银纳米颗粒呈近球形,提高提取液的pH有利于获得粒径较小、分散性好、稳定性高的银纳米颗粒。进一步考察制得的银纳米颗粒的抗菌性能,结果表明,其对大肠杆菌和金黄色葡萄球菌有很强的抑制作用,最小抑菌质量浓度(M IC)分别可达1.69和3.38 mg/L。 相似文献
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K. D. Economou V. Oreopoulou C. D. Thomopoulos 《Journal of the American Oil Chemists' Society》1991,68(2):109-113
The antioxidant activities of methanol extracts of oregano, dittany, thyme, marjoram, spearmint, lavender and basil were tested
in lard stored at 75°C. The concentration of extracts in lard varied from 0.01 to 0.20%. Oregano extract was found to be the
most effective in stabilizing lard, followed by thyme, dittany, marjoram and lavender extracts, in a decreasing order. The
induction period of lard increased with antioxidant concentration. After the induction period, peroxide formation proceeded
rapidly, following pseudo-zero order reaction kinetics. The rate of the reaction decreased slightly with increasing plant
extract concentration. Combined addition of plant extracts in lard showed a low synergistic action between thyme extract and
spearmint extract. 相似文献