确证

A novel carbonyl transposition led by anilines'nucleophilic addition to methyl 2-keto α-D-glucopyranoside was discovered. And the mechanism of the reaction concerned to an enol rearrangment was provided through tracing the change of 〓H-NMR and 〓C-NMR of a hemiacetal intermediate which was obtained in the reaction of o-phenylene diamine with 2-keto glycoside. Both the intermediate and the converting product were identified by 〓H-NMR,〓C-NMR,〓H-〓H COSY and HMQC.

一、发现了2-位氧化α-甲基D-葡萄糖苷的芳胺亲核加成引起羰基转位的新方法，利用核磁共振氢谱及碳谱对邻苯二胺与2-位氧化α-甲基D-葡萄糖苷加成生成的稳定中间体半缩酮化合物在氘代丙酮中的变化进行跟踪，结合对转化产物的氢氢相关谱和HMQC结构确证，提出了该反应中2-位羰基通过烯醇化互变而转至3-位的机理并得到了验证。

Two novel development accelerant s with function were synthesized from 6-amido-benzimid-azole, phenyl-hydrosulfuryl-triazole and ringy hydrazide. The structures were confirmed by IR, MS and elemental analysis.

以6-氨基苯并咪唑和苯基巯基三唑为吸附基团，以环状酰肼为显影促进基团，合成了两个新型功能性显影促进剂，其结构经IR，MS和元素分析确证。

The synthesis, crystal structure and characterization of 4, 5-dimethyl-2-(2-pyridyl) imidazole were reported.

为了制备研究2-取代咪唑配合物，设计合成了4， 5-二甲基-2-（2-吡啶基）咪唑，用IR、MS、1H-NMR对其结构进行了确证，并对其晶体结构进行了分析。

The structure of the product was determined to be indole derivatives by thespectroscopy, chemical hydrolysis and X-ray analysis.

产物通过波谱、化学水解方法和单晶的X〓ray分析确证为吲哚衍生物。

There is no conclusive evidence about the relative length, complexity, and temperatures of the various glacial and interglacial periods.

还无法确证不同冰川期与间冰期之间的相对长度、复杂性及温度。

The monoclinic phase of 〓, This is an isomer of orthorhombic-〓. It ensures theexistence of different phases of 〓.

4〓的单斜相这是已知的正交相〓的一个同质异晶体，它的获得确证了〓的不同相的存在。

At the second stage the juror heard evidence, but also relied on their own knowledge.

在第二个时期，陪审员既听取证据，也依靠自我确证。

To arrive at no result to be contrary to one's usual habit to keep surging in one's head to establish the existence of sth.

确证的存在 18。

To study the changing law of stable carbon isotope composition in cattle tail hair with the change of feeds composition, and to verify each section of cattle tail hair can't exchange with other sections once it is produced, and it contains isotopic information which can reflectthe cattle feeds information from the time when it is produced.

研究牛尾毛中稳定性碳同位素组成随饲料改变的变化规律，确证牛尾毛一旦长成，其中的稳定性碳同位素不再与其它部分的进行交换，每段毛发记录的同位素信息可反映毛发生长时的饲料信息。

To study the changing law of stable carbon isotope composition in cattle tail hair with the change of feeds composition, and to verify each section of cattle tail hair can't exchange with other sections once it is produced, and it contains isotopic information which can reflect the cattle feeds information from the time when it is produced.

研究牛尾毛中稳定性碳同位素组成随饲料改变的变化规律，确证牛尾毛一旦长成，其中的稳定性碳同位素不再与其它部分的进行交换，每段毛发记录的同位素信息可反映毛发生长时的饲料信息。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。