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以1mg/ml的柑橘和瓯柑橘皮类黄酮溶液、1%的柑橘皮和瓯柑橘皮水、乙醇提取液各0.1mL加入离体蛙心灌流液,结果使蛙心收缩力分别提高101.3±49.6(%),94.0±25.2(%),81.4±38.5(%),93.9±34.0(%),150.3±117.8(%),165.1±113.5(%);心率分别降低19.8±31.9(%),22.1±22.3(%),28.0±16.2(%),28.5±20.8(%),19.3±14.2(%),23.0±24.3(%)(均P〈0.05)。说明柑橘和瓯柑橘类黄酮、柑橘皮和瓯柑橘皮的水、醇提取液对离体蛙心均有增强心肌收缩力和减慢心率作用,各药物的持续时间在2~12min之间。 相似文献
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珍稀植物鹅掌楸组织培养与离体快繁技术研究 总被引:3,自引:0,他引:3
鹅掌楸是优良绿化与优质用材的野生珍稀植物之一,采野生多年生植物的冬芽为外殖体,以春芽、叶片、叶柄、花蕾和果实作对照,用MS为基本培养基,以1/2MS作对比,研究鹅掌楸的组织培养快繁技术。结果表明,初代培养最适为:MS 2.5 mg/L6-BA 1.0 mg/L IBA 0.2 mg/L KT,增殖与继代培养最适为:MS 1.0 mg/L6-BA 0.5 mg/L IBA;将组织培养苗扦插在有机腐殖质土和珍珠岩(3:1)基质中,瓶外生根率达83.3%以上。 相似文献
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本试验通过建立柑桔裂皮病(Citrus exocortis viroid CEV)指示植物的愈伤组织系统,探索裂皮病类病毒的消毒方式和接种感染愈伤组织的方法,分析了CEV对愈伤组织的处理效应及培养条件对接种效果的影响。最后初步探讨了CEV离体鉴定的可行性及其意义。 相似文献
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本试验建立了柑桔生产上常用砧木的愈伤组织系统,采用摸索出来的离体接种技术将柑桔裂皮病类病毒(Cit-rus exocortis viroid,CEV)接种到愈伤组织上。各砧木愈伤组织对CEV侵染反应的差异表明,枳柚、宜昌橙愈伤组织最抗CEV,而枳、枳橙最敏感。本文还初步探讨了离体条件下筛选CEV复制抑制剂的方法。 相似文献
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Objective:To evaluate the accuracy of a scoring system combining zygote and embryo morphology in predicting the outcome of in vitro fertilization(IVF)treatment.Methods:In a study group,117 consecutive IVF or intracytoplasmic sperm injection(ICSI) cycles with embryo transfer were carried out and 312 embryos were scored Using a combmed scoring system(CSS)of zygote and embryo morphology before transplantation.In a control group,a total of 420 IVF or ICSI cycles were carried out and 1176 embryos were scored using a cumulative embryo score(CES).The effects of the combined scoring system on the embryo implantation rate and pregnancy rate per cycle were analyzed.Results:Using the combined scoring system,the embryo implantation rate(27.6%)and the clinical pregnancy rate(48.7%)were significantly higher than those in the control group(20.8%and 38.6%,respectively).Also,the implantation rate of embryos scoring≥70 (38.5%:82 sacs/213 embryos)was significantly higher (P<0.001)than that of embryos scoring<70(4%:4 sacs/99 embryos).The pregnancy rate of patients with embryos scoring≥70 using the combined scoring system(66.7%)Was significantly higher(P<0.001)than that of patients with embryos scoring≥20 using the cumulative embryo score(59.0%).Conclusion:The results suggest that selecting embryos with a high Score(≥70)using the combined scoring system could inerease the implantation rate and pregnancy rate,and that using a scoring system combining assessments of human zygotes and pre-implantation embryos might predict IVF outcomes more accurately than using a cumulafive embryo score. 相似文献
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由大戟科大戟属多年生灌木一品红 (Euphorbiapulcherrimawilld)幼叶诱导形成的愈伤组织 ,在MS +NAA 0 .5mg .L-1(以下单位相同 )的培养基上培养 10— 15d后的愈伤组织 ,在光照下植于MS +ZT1.0 +NAA0 .1培养基上培养 ,芽分化率为 6 6 4 %。愈伤组织先在MS +2 ,4 -D1.0的培养基上预培养 2 0d ,再转入MS +ZT1.0 +NAA0 .1的培养基上培养 ,芽分化率明显提高 ,分化率为 89 3% ,但是在仅有 2 ,4 -D的培养基上培养未见芽形成 相似文献
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杜仲叶提取物的体外抗氧化作用 总被引:1,自引:1,他引:1
刘静 《陕西教育学院学报》2007,23(2):65-67
通过测定杜仲叶提取物对O2-和.OH的清除率,对小鼠红细胞氧化溶血的影响和对各脏器MDA生成的抑制率,评价杜仲叶提取物的体外抗氧化作用。实验结果表明,杜仲叶提取物具有明显的体外抗氧化作用。 相似文献