以含有不同KH_2PO_4浓度控制不同的风信子水培条件,选择卡耐基品系大小均一的风信子鳞茎设置对照组进行试验,观察并记录不同水培条件下风信子叶芽、根系、花的生长等情况。初步总结不同水培条件对风信子生长的影响,结果表明:卡耐基品系...以含有不同KH_2PO_4浓度控制不同的风信子水培条件,选择卡耐基品系大小均一的风信子鳞茎设置对照组进行试验,观察并记录不同水培条件下风信子叶芽、根系、花的生长等情况。初步总结不同水培条件对风信子生长的影响,结果表明:卡耐基品系的风信子在水培时,其根系在浓度为0. 05 mmol/ L KH_2PO_4水培条件下的长度与其他KH_2PO_4浓度水培条件下的风信子根系长度有显著差异。而在不同的KH_2PO_4浓度水培条件下,风信子的花期时长、花茎高度和叶片长度并没有显著差异。此外,试验还讨论证实适当的钾和磷可以提前风信子的花期、提高花的品质和观赏价值。展开更多
A simple and efficient method has been developed;benzil/benzoin undergoes smooth condensation with various substituted aldehyde and ammonium acetate in the presence of potassium dihydrogen phosphate（KH;PO;） under mi...A simple and efficient method has been developed;benzil/benzoin undergoes smooth condensation with various substituted aldehyde and ammonium acetate in the presence of potassium dihydrogen phosphate（KH;PO;） under mild reaction conditions to afford the corresponding trisubstituted imidazole in excellent yields.The method for synthesis of product,the reaction mixture was reflux in ethanol for 40-90 min.The present method is simple,efficient,and cost-effective.展开更多
文摘以含有不同KH_2PO_4浓度控制不同的风信子水培条件,选择卡耐基品系大小均一的风信子鳞茎设置对照组进行试验,观察并记录不同水培条件下风信子叶芽、根系、花的生长等情况。初步总结不同水培条件对风信子生长的影响,结果表明:卡耐基品系的风信子在水培时,其根系在浓度为0. 05 mmol/ L KH_2PO_4水培条件下的长度与其他KH_2PO_4浓度水培条件下的风信子根系长度有显著差异。而在不同的KH_2PO_4浓度水培条件下,风信子的花期时长、花茎高度和叶片长度并没有显著差异。此外,试验还讨论证实适当的钾和磷可以提前风信子的花期、提高花的品质和观赏价值。
文摘A simple and efficient method has been developed;benzil/benzoin undergoes smooth condensation with various substituted aldehyde and ammonium acetate in the presence of potassium dihydrogen phosphate（KH;PO;） under mild reaction conditions to afford the corresponding trisubstituted imidazole in excellent yields.The method for synthesis of product,the reaction mixture was reflux in ethanol for 40-90 min.The present method is simple,efficient,and cost-effective.
