羟基酸

The present paper carries on the raise first to the camptotheca acuminata roots of the hair, then in the use chloroform extraction camptotheca acuminata culture medium the camptotheca acuminata alkali and so on effective component, and examines the law with HPLC to examine its effective component, the examination discovers the camptotheca acuminata secretion in the culture medium secondary metabolite besides the camptotheca acuminata alkali, the hydroxyl camptotheca acuminata alkali, the white birch fatty acid, but also includes other effective components.

本论文先对喜树发根进行培养，然后使用氯仿提取喜树培养基中喜树碱等有效成分，并用HPLC检测法检测其有效成分，检测发现喜树分泌在培养基中的次生代谢产物除了喜树碱、羟基喜树碱、白桦脂酸外，还含有其他有效成分。

Thepresent paper carries on the raise first to the camptothecaacuminata roots of the hair, then in the use chloroform extractioncamptotheca acuminata culture medium the camptotheca acuminataalkali and so on effective component, and examines the law withHPLC to examine its effective component, the examination discoversthe camptotheca acuminata secretion in the culture medium secondarymetabolite besides the camptotheca acuminata alkali, the hydroxylcamptotheca acuminata alkali, the white birch fatty acid, but alsoincludes other effective components.

本论文先对喜树发根进行培养，然后使用氯仿提取喜树培养基中喜树碱等有效成分，并用HPLC检测法检测其有效成分，检测发现喜树分泌在培养基中的次生代谢产物除了喜树碱、羟基喜树碱、白桦脂酸外，还含有其他有效成分。

The ten target compounds from alkyl substituent to aryl substituent that have not yet been reported,which was obtained by dehydration, Subsequently treated with sodium nitrite resulting nitroso compounds and then reduced.

本论文以2-羟基-3-萘酸和邻巯基苯胺为原料，通过分子脱水、亚硝化、还原等反应合成了10个不同取代基团的4-苯并噻唑基-[1，2-d]萘并噁唑衍生物，并优化了合成的工艺条件。

Purpose To evaluate the diagnostic and differential diagnostic value of 99mTc-MDP scintigraphy in breast cancer.

目的 评价99mTc-羟基亚甲基二膦酸乳腺显像对乳腺癌的诊断价值。

The proportion of the phase transfer catalyst and tertiary amine are usually in the range of about 1-5 and about 0.01-5.0 mole percent, respectively, based on total dihydroxyaromatic compound and dicarboxylic acid employed. In the second phosgenation step, the pH is raised to at least 10 and a stoichiometric phosgene excess of at least 5% is introduced.

相转移催化剂和叔胺的比例以二羟基芳族化合物和二羧酸的总量为基础计通常分别在约1―5和0.01―5.0摩尔百分数的范围内，在第二步光气化步骤中，pH值升高到至少约10，并导入超过化学计量约至少5wt％的光气。

Ammonium carbamate was found to be the best ammonia donor for the reaction and its favorable concentration is 120~160 mmolL^(-1). The optimal water activity, reaction temperature, pH value and concentration of D, L-HPGME are 0.55~0.75, 35~40℃, 7.5~8.0 and 40 mmolL^(-1), respectively.

该反应的最适氨源为氨基甲酸铵，其较佳浓度为120~160mmolL^(-1)；最适水活度、反应温度、pH值、对羟基苯甘氨酸甲酯浓度分别为0.55~0.75、35~40℃、7.5~8.0和40mmlL^(-1)。

These catalytic reactions follow the bifunctional mechanism of Lewis acid activation and metal hydroxide activation.

催化反应遵循Lewis酸活化和金属羟基活化的双功能机理。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。