A new method for the determination of toosendanin in the bark of Melia toosendan sieb.et zucc.by reversed-phase high performance liquid chromatography（RP-HPLC）with MeOH-H2O as the mobile phase at 215 nm of the uv-vi...A new method for the determination of toosendanin in the bark of Melia toosendan sieb.et zucc.by reversed-phase high performance liquid chromatography（RP-HPLC）with MeOH-H2O as the mobile phase at 215 nm of the uv-vis wavelength was investigated.A good seperatioin of toosendanin with matrix was obtained within 20 min by using Eclipse XDB-C8 column.The linear regression equation for peak area-toosendain concentration is A=20.818C-31,r=0.9997.展开更多
研究了楝树籽不同方式的提取物 (NⅠ ,NⅡ )对普通铁质淋溶土壤、简育水耕人为土壤供N和N肥利用率的影响 .NⅠ可在一定程度上抑制这两种土壤产生NO3 N ,NⅡ在两种土壤上前期均能显著固定NH4+ N ,并在后期释放出NH4+ N .如果NⅠ和NⅡ ...研究了楝树籽不同方式的提取物 (NⅠ ,NⅡ )对普通铁质淋溶土壤、简育水耕人为土壤供N和N肥利用率的影响 .NⅠ可在一定程度上抑制这两种土壤产生NO3 N ,NⅡ在两种土壤上前期均能显著固定NH4+ N ,并在后期释放出NH4+ N .如果NⅠ和NⅡ 2种提取物同时与化肥N施入土壤 ,则可明显改善土壤的供N状况 ,使之与作物需N过程更吻合 .盆栽实验证明 ,NⅡ可显著提高肥熟旱耕人为土壤上作物对N肥的利用率 .展开更多
文摘A new method for the determination of toosendanin in the bark of Melia toosendan sieb.et zucc.by reversed-phase high performance liquid chromatography（RP-HPLC）with MeOH-H2O as the mobile phase at 215 nm of the uv-vis wavelength was investigated.A good seperatioin of toosendanin with matrix was obtained within 20 min by using Eclipse XDB-C8 column.The linear regression equation for peak area-toosendain concentration is A=20.818C-31,r=0.9997.
