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A novel synthetic approach of 3,3'-azobis(6-amino-1,2,4,5-tetrazine) was firstly devised. Taking 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine as a primary material, DAAT was synthesized by high pressure ammonolysis and potassium permanganate oxidation. Compared with the four-step reaction in the literature, this new approach was reduced to two steps with a yield of 58.1%. The intermediate and DAAT were characterized by elemental analysis, IR and NMR spectra.

自行设计了3，3'-偶氮双(6-氨基-1，2，4，5-四嗪)新合成路线、采用3，5-双(3，5-二甲基吡唑-1-基)-1，2，4，5-四嗪为原料，由文献报道的4步反应缩减为2步，经高压氨解、高锰酸钾氧化合成了DAAT，总收率大幅提高，达到58.1%，并采用元素分析、红外光谱、核磁共振光谱等进行了结构表征。

Of or related to the amnion or characterized by developing an amnion.

羊膜的、与之相关的或者产生羊膜特性的。

CA-CTSs including N,O-carboxymethyl chitosan,N,O-1-carboxyethyl chitosan (N,O-1-CEC),N,O-2-carboxyethyl chltosan(N,O-2-CEC),N-carboxymethyl chitosan and N-1-carboxyethyl chitosan(N-1-CEC) are quaternized using active quaternary salts prepared in laboratory.5 series including 25 kinds amphoteric chitosans characterized with polymeric ampholyte,in which 24 kinds are synthesized firstly,are obtained, 2-Hydroxypropyl dimethylbenzyl ammonium N,O-(1-carboxyethyl) chitosan chloride (GDMBA-N,O-1-CEC) is hydrolyzed into serial low molecular weight GDMBA-N, O-1-CEC with acid as catalyst and microwave as assistant instrumentality innovately.

以合成的活性季铵盐改性了N，O-羧甲基壳聚糖、N，O-1-羧乙基壳聚糖(N，O-1-CEC)、N，O-2-羧乙基壳聚糖(N，O-2-CEC)、N-羧甲基壳聚糖和N-1-羧乙基壳聚糖(N-1-CEC)等羧烷基壳聚糖，得到5个系列25种具有两性高分子电解质特征的新季铵化羧烷基壳聚糖，其中24种为首次合成；创新提出以微波辅助酸催化的方法催化2-羟丙基二甲基苄基-N，O-(1-羧乙基)壳聚糖氯化铵(GDMBA-N，O-1-CEC)水解，得到了低分子量的GDMBA-N，O-1-CEC。

In particular, the throat vibrato is characterized by two parameters: amplitude and frequency.

特别是，喉咙颤音的特点是两个参数：幅值和频率。

This rock zone, with a NE striking, the whole length of 1 400 km and the width of 100～150 km, is characterized by not onlyalkaline rocks (analcite biotite olivine melilitites, leucititic alnoites, nephelite syenites, aegirite augite syenites, melanite syenites, riebeckite syenite and aegirite bearing quartz syenites) and alkaline granite (riebeckite granite, and aegitite augite riebeckite granite), but also a lot of syenites, monzonites and alkaline feldspar granites or miarolitic K feldspar granites.

该岩带全长约1400km，宽100～150km，不仅发育有狭义的碱性岩(方沸黑云橄榄黄长岩、白榴黄长煌斑岩、霞石正长岩、霓辉石正长岩、黑榴石正长岩和含霓石石英正长岩)和碱性花岗岩(钠闪石花岗岩、霓辉石钠闪石花岗岩)，还发育有大量的正长岩类二长岩类碱长花岗岩或晶洞钾长花岗岩。

These products have currently have an exclusive production of narcotic analeptic - Flumazenil; have for the treatment of patients with malignant tumor of bone metastasis pain and hypercalcemia of pamidronate; has long enjoyed a good reputation, with "fast, good, inexpensive and widely "characterized" Kimcheon "gentamicin procaine capsules and" Kimcheon "brand gentamycin procaine B12-dimensional particles and other agents .

这些产品中有有目前国内独家生产的麻醉催醒剂——氟吗西尼；有用于治疗恶性肿瘤病人骨转移疼痛和高钙血症的帕米膦酸二钠；有久负盛名，具有"快、好、廉、广"之特点的"金泉"庆大霉素普鲁卡因胶囊和"金泉"牌庆大霉素普鲁卡因维B12颗粒等制剂。

Though a young vogue brand in Italy, the rising Dazzle has soon been followed by numerous vogue hunters. The brand integrates the profound connotation of Italian culture and vogue trends of modern sports, leisure and entertainment, while embodying the unique Italian style characterized as ancientness, luxuriance and leisure.

创造于1991年的DAZZLE，一个由敏锐的时尚触角而制作流行手工单品开始，是意大利一个新兴而迅速被众多时尚人士追随的年轻时尚品牌，融合了意大利积淀的深厚文化底蕴和现代运动休闲娱乐的时尚思潮，将多种矛盾通过艺术的配搭从而体现出复古华丽而休闲的独特意大利风格。

A dance style of the Andalusian Gypsies characterized by forceful, often improvised rhythms.

曾经在这儿住过的吉普赛人已经人去楼空，不再返回了。

Anencephaly, the single most common open neural tube defect, is characterized by the absence of the cerebral hemispheres and the lack of bony calarium aboe the orbits Fig.

无脑畸形，最常见的单一的开放性神经管缺损，其特点是无大脑半球且没有眼眶以上的骨性颅盖（图10-37A-B和图10-37C）。胎儿有正常的中脑和后颅窝，但大脑半球未正常发育。

A cell or an organism characterized by an aneuploid chromosome number.

有多于单倍体两倍染色体的细胞或有机体。

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。