[Objective] The control methods of the bulb rot of Iphigenia indica Kunth.caused by Fusarium orthoceras App.et Wr.var.longius （Sherb.） were explored.[Method] The effect of eight different kinds of metal ions on the ...[Objective] The control methods of the bulb rot of Iphigenia indica Kunth.caused by Fusarium orthoceras App.et Wr.var.longius （Sherb.） were explored.[Method] The effect of eight different kinds of metal ions on the pathogen was studied;the contents of seven different kinds of metal ions in rhizosphere soil and bulb were also determined.[Result] The results showed that when the concentration of Cu2＋ or Mg2＋ was greater than 1.0mg/L or the concentration of Zn2＋ or Ca2＋ was lower than 0.5mg/L,the growth of pathogen could be inhibited.The results also showed that the bulb could enrich K highly,enrich Zn and Mg,limit the absorption of Ca and Fe,and inhibit the absorption of Cu and Mn during the growth process of bulb in I.indica Kunth.[Conclusion] Micronutrient fertilizer containing Mg could be used to prevent and cure the bulb rot of I.indica Kunth.展开更多
Objective:To isolate,identify,and evaluate a new angiotensin-converting enzyme inhibitor from Peperomia pellucida(L.)Kunth herbs.Methods:A dried sample of Peperomia pellucida herb was successively macerated with n-hex...Objective:To isolate,identify,and evaluate a new angiotensin-converting enzyme inhibitor from Peperomia pellucida(L.)Kunth herbs.Methods:A dried sample of Peperomia pellucida herb was successively macerated with n-hexane and ethyl acetate.The ethyl acetate extract solution was evaporated to obtain the crude extract.Vacuum liquid column chromatography and thin layer chromatography were performed to obtain two pure compounds.Then,both compounds were elucidated and identified using the spectroscopic method.Angiotensin-converting enzyme inhibitory activity studies of both compounds were determined using angiotensin-converting enzyme kit WST-1 with spectrophotometer microplate reader 96-well at 450 nm wavelength.Results:Two bioactive compounds were successfully isolated from Peperomia pellucida herb,including a new compound of 2,3,5-trimethoxy-9-(12,14,15-trimethoxybenzyl)-1 H-indene and pellucidin A.Both compounds demonstrated angiotensin-converting enzyme inhibitory activity,with IC50 values of 72 μM(27.95 μg/mL)and 1 1μM(4.4 μg/mL),respectively.Conclusions:In the present study,two active angiotensin-converting enzyme inhibitors were successfully isolated and purified from Peperomia pellucida which is used as an antihypertensive in traditional medicine,and support its use as an angiotensin-converting enzyme-inhibiting drug.展开更多
目的观察吉祥草中甾体皂苷RCE-4对宫颈癌裸鼠移植瘤的抑制作用。方法采用传统方法分离鉴定RCE-4。将0.3 m L Caski(4×107/m L)细胞悬液接种于裸鼠右侧后腿背部皮下,建立宫颈癌移植瘤模型,然后按瘤体积大小随机分为模型组、紫杉醇(1...目的观察吉祥草中甾体皂苷RCE-4对宫颈癌裸鼠移植瘤的抑制作用。方法采用传统方法分离鉴定RCE-4。将0.3 m L Caski(4×107/m L)细胞悬液接种于裸鼠右侧后腿背部皮下,建立宫颈癌移植瘤模型,然后按瘤体积大小随机分为模型组、紫杉醇(10 mg/kg)和RCE-4(25、50、100 mg/kg)组,1次/d给药,连续4周,末次给药的次日处死裸鼠,称量裸鼠体质量、瘤质量,测量肿瘤体积,计算抑瘤率。光镜下观察移植瘤组织形态学变化,TUNEL染色测定细胞凋亡率,免疫组化检测肿瘤组织中COX-2表达,荧光定量PCR测定移植瘤组织中Bcl-2、Bax、Caspase-3和Caspase-9 mRNA表达,计算Bcl-2/Bax值,Western blot检测移植瘤组织中Survivin蛋白表达。结果 RCE-4(25、50、100 mg/kg)可明显降低宫颈癌裸鼠移植瘤的体积和瘤质量(P<0.05,P<0.01),上调Bax、Caspase-3和Caspase-9 mRNA表达,下调Bcl-2 mRNA表达和COX-2、Survivin蛋白表达及Bcl-2/Bax值(P<0.05,P<0.01)。结论RCE-4对宫颈癌裸鼠移植瘤的生长具有显著抑制作用,其机制可能与其上调Bax、Caspase-9、Caspase-3的表达和下调Survivin、Bcl-2、COX-2的表达有关。展开更多
目的建立吉祥草中阿魏酸和芦丁的测定方法。方法采用反相高效液相色谱法,Wondasil C18色谱柱（250mm×4.6mm,5μm）,流动相为甲醇-0.4%磷酸水（38∶62）,体积流量为1 m L/min,检测波长270nm;柱温30℃。结果阿魏酸在0.40-2.40μg范...目的建立吉祥草中阿魏酸和芦丁的测定方法。方法采用反相高效液相色谱法,Wondasil C18色谱柱（250mm×4.6mm,5μm）,流动相为甲醇-0.4%磷酸水（38∶62）,体积流量为1 m L/min,检测波长270nm;柱温30℃。结果阿魏酸在0.40-2.40μg范围内呈良好线性关系（r=0.999 9）,平均回收率为100.1%,RSD为2.8%;芦丁在0.625-5.625μg范围内呈良好线性关系（r=0.999 95）,平均回收率为100.7%,RSD为1.3%。结论该方法分离效果好,操作简单,稳定性好,重复性好,可用于吉祥草中阿魏酸和芦丁的测定。展开更多
目的对吉祥草中总黄酮的体外抗氧化活性进行研究。方法采用盐酸-镁粉法测定黄酮含量,通过1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)法和铁离子还原(ferric ion antioxidant power,FRAP)法评价吉祥草总黄酮提取物的...目的对吉祥草中总黄酮的体外抗氧化活性进行研究。方法采用盐酸-镁粉法测定黄酮含量,通过1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)法和铁离子还原(ferric ion antioxidant power,FRAP)法评价吉祥草总黄酮提取物的抗氧化活性。结果总黄酮提取物和脂溶性成分的EC50为(0.253±0.009)g·L-1,FRAP值为(0.964±0.028)mmol·g-1。结论吉祥草中总黄酮具有较强的抗氧化活性。展开更多
文摘[Objective] The control methods of the bulb rot of Iphigenia indica Kunth.caused by Fusarium orthoceras App.et Wr.var.longius （Sherb.） were explored.[Method] The effect of eight different kinds of metal ions on the pathogen was studied;the contents of seven different kinds of metal ions in rhizosphere soil and bulb were also determined.[Result] The results showed that when the concentration of Cu2＋ or Mg2＋ was greater than 1.0mg/L or the concentration of Zn2＋ or Ca2＋ was lower than 0.5mg/L,the growth of pathogen could be inhibited.The results also showed that the bulb could enrich K highly,enrich Zn and Mg,limit the absorption of Ca and Fe,and inhibit the absorption of Cu and Mn during the growth process of bulb in I.indica Kunth.[Conclusion] Micronutrient fertilizer containing Mg could be used to prevent and cure the bulb rot of I.indica Kunth.
基金supported by grant “Hibah Tugas Akhir Mahasiswa Doktor(TADOK)Tahun 2018” Directorate of Research and Humanity Engagement Universitas Indonesia(grant number:1234/UN2.R3.1/HKP.05.00/2018)
文摘Objective:To isolate,identify,and evaluate a new angiotensin-converting enzyme inhibitor from Peperomia pellucida(L.)Kunth herbs.Methods:A dried sample of Peperomia pellucida herb was successively macerated with n-hexane and ethyl acetate.The ethyl acetate extract solution was evaporated to obtain the crude extract.Vacuum liquid column chromatography and thin layer chromatography were performed to obtain two pure compounds.Then,both compounds were elucidated and identified using the spectroscopic method.Angiotensin-converting enzyme inhibitory activity studies of both compounds were determined using angiotensin-converting enzyme kit WST-1 with spectrophotometer microplate reader 96-well at 450 nm wavelength.Results:Two bioactive compounds were successfully isolated from Peperomia pellucida herb,including a new compound of 2,3,5-trimethoxy-9-(12,14,15-trimethoxybenzyl)-1 H-indene and pellucidin A.Both compounds demonstrated angiotensin-converting enzyme inhibitory activity,with IC50 values of 72 μM(27.95 μg/mL)and 1 1μM(4.4 μg/mL),respectively.Conclusions:In the present study,two active angiotensin-converting enzyme inhibitors were successfully isolated and purified from Peperomia pellucida which is used as an antihypertensive in traditional medicine,and support its use as an angiotensin-converting enzyme-inhibiting drug.
文摘目的对吉祥草中总黄酮的体外抗氧化活性进行研究。方法采用盐酸-镁粉法测定黄酮含量,通过1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)法和铁离子还原(ferric ion antioxidant power,FRAP)法评价吉祥草总黄酮提取物的抗氧化活性。结果总黄酮提取物和脂溶性成分的EC50为(0.253±0.009)g·L-1,FRAP值为(0.964±0.028)mmol·g-1。结论吉祥草中总黄酮具有较强的抗氧化活性。
