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| Isoquinoline alkaloids of Litsea euosma were studied for the first time and compounds were obtained. The structure of these compounds were elucidated as boldine ,norisoboldine ,reticuline ,β-sitosterol and β-daucosterol by spectral analysis. |
中文意思：
首次对清香木姜子(LitseaeuosmaW.W.Smith)中的异喹啉生物碱进行了研究,采用硅胶柱层析、重结晶等分离手段从中分离纯化得个化合物,通过现代波谱技术及与标准品对照等方法鉴定了它们的结构,包括 个异喹啉生物碱和β 谷甾醇及β 胡萝卜甙. |
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Isoquinoline alkaloids of Litsea euosma were studied for the first time and compounds were obtained. The structure of these compounds were elucidated as boldine ,norisoboldine ,reticuline ,β-sitosterol and β-daucosterol by spectral analysis.
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首次对清香木姜子(LitseaeuosmaW.W.Smith)中的异喹啉生物碱进行了研究,采用硅胶柱层析、重结晶等分离手段从中分离纯化得个化合物,通过现代波谱技术及与标准品对照等方法鉴定了它们的结构,包括 个异喹啉生物碱和β 谷甾醇及β 胡萝卜甙. |
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Isosafrole was synethesized through the isomerization of safrole with KOH and NaOH above the temperature of 00℃. 9% safrole was converted and the yield was 9%, the purity of the product was 99%.
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在NaOH与KOH作用下 ,在 0℃以上使黄樟油素异构化 ,合成了异黄樟油素 ,转化率达 9% ,收率达 9 % ,产品纯度 99%以上。 |
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Isothermal Forging Process of 8 Alloy Portait Rockerarm
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8铝合金纵向摇臂等温模锻工艺的研究 |
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Isozymes and Their Relationship with Neoteny in Neosalanx oligodontis Chen
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寡齿新银鱼同工酶及其与幼态持续的关系 |
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It shows that the model of dissolution equilibrium of DHVR in mixed C solvent obeys the Flory Huggins equation and the solubility parameters of DHVR under ～℃ can be calculated by the equation.
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果表明，DHVR与混合C溶剂的溶剂平衡模型遵循Flory－Huggins方程，由此计算得到了DHVR在 ～℃的混合C溶剂中的溶解度参数； |
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It was also showed that the concentration content and concentration factor of Lanthanum in Closterium lunula under 0 mg/L(La + ) treating were higher than which under mg/L(La + ) treating.
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高浓度（0mg／L）处理组的富集量和富集系数，均高于低浓度的（mg／L）处理组 |
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