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The results show that:(1) Light-calcined MgO powders prepared with nature magnesite or Mg2 both are of face-centered cubic structure.

结果发现:水化前后得到的都是面心立方晶体结构的MgO,但水化前得到的轻烧MgO中仍存在官能团CO32-的残留物,而水化后得到的轻烧MgO中不存在CO32-,而且颗粒变得较易破碎,大大减少了细磨时间;再者,水化后的轻烧MgO活性较高,加上Mg2在分解过程中残留的水分对MgO 的烧结起催化作用,因此,使其经高温锻烧制得的烧结镁砂的开口气孔率由水化前的2.0%下降到0.6%,闭口气孔率由水化前的6.1%下降到2.8%,体积密度由水化前的3.29g/cm3提高到3.46g/cm3。

The development of frame structure architectural space in ancient China plays an important role in the evolution of antique furniture.

中国古代构架式建筑空间的发展对古典家具的演变成长起着极为重要的形响作用,其建筑空间高度的转变直接影响了古典家具的形体从低到高的变化,一些新颖的家具形态的创造在很大程度上受到建筑空间里不严密的结构因素的影响,同时建筑内外空间成熟发展也促进了家具功能的逐步完善。

Total RNAs from KAx-3 cells and AK127 cells(developed for 14h) were isolated. After the reverse transcription and PCR reaction, two distinct differential fragments were acquired., fragment A was from KAx-3 cells and fragment C was from AK127 cells. After retriving and reamplifying the differentially expressed fragments, white-blue plaqueselection, the fragments were purified. Northern blot proved that fragment A was from KAx-3 cells and fragment C was from AK127 cells. The results of sequencing and researching for NCBI database have been showed: part sequence of fragment A shows 91% similarity to the gene encoding DhkA, 92% similarity to the gene encoding DhkF, 91% similarity to the gene encoding STATc, 97% similarity to the homoeobox gene encoding protein. These genes play important part in controlling cell differentiation and cell proportion in Dictyostelium discoideum.

本研究通过提取盘基网柄菌发育14小时的野生型KAx-3细胞和突变型AK127细胞的总RNA,运用mRNA差异显示法分离出了两条明显的差异表达片段,其中片段A来自野生型KAX-3细胞,片段C来自突变型Ak127细胞;并通过凝胶回收差异片段、对差异片段进行再次PCR、蓝白斑筛选克隆、提取质粒、酶切电泳纯化差异片段;接着进行Northern杂交的结果表明,片段A只与野生型KAx-3细胞的总RNA有杂交信号,片段C只与突变型AK127细胞的总RNA有杂交信号,这就排除了差异片段假阳性的可能;最后通过测序,搜索NCBI BLAST数据库发现:片段A的小部分序列与编码组氨酸激酶DhkA基因中一段序列的相似性高达91%,与编码组氨酸激酶DhkF基因中的一段序列相似性高达92%,与编码STATc蛋白基因的一段序列相似性达91%,以及与编码同源框蛋白的基因中的一段序列相似性达97%,这些基因在盘基网柄菌细胞分化和细胞比例调控过程中起着相当重要的作用,这些数据进一步说明了突变细胞不能完成发育的原因。

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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。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。