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The microbial community structure of anaerobic activated sludge is very complex with many similar microbe gene sequences. The Single-Strand Conformation Polymorphism technology is proposed in this respect.

针对厌氧活性污泥微生物群落结构复杂，群落中相似基因序列较多等特点，对影响单链构像多态性图谱分辨率的电泳温度、甘油、交联度和影响聚合酶链式反应的BSA等因素进行了实验研究。

Based on the data, the changing characteristics of parameters and their capability for classification of aftershock sequences have been discussed.

在此基础上对序列参数的变化特征及其序列分类能力进行讨论。

On the basis of sequences from GenBank,part of exonl and intronl of goat Agouti gene fragments was amplified.

本试验根据GenBank上已发表的牛(X99691)、猪(AJ427478)马(AF288358)和人的Agouti基因序列设计引物，扩增山羊Agouti基因外显子1和内含子1的部分序列片断，内含子1的部分序列与本实验室之前测得的山羊Agouti基因序列片断(GenBank序列号：EF587236)进行拼接，得到5270bp长度的山羊Agouti基因序列。

Based on the above results, we suggest that selective changes of low-copy sequences occur rapidly after polyploid formation, which may contribute to the differentiation of chromosomes in newly formed allopolyploid wheats.

认为这些低拷贝的染色体专化序列对于多倍体形成后部分同源染色体之间的进一步分化起着重要作用。

Abstract:Seven species of Amanita, collected in Lishui of Zhejiang Province, China, were identified primarily based on morphological characteristics. The rDNA ITS regions of these species were cloned and sequenced, and the characteristics of ITS sequences were compared and analysed.

常规对像鹅膏菌属大型真菌的分类鉴定主要是依据子实体的形态，颜色，气味，以及孢子特征等，这些形态特征经常是易变的，模糊的，易混淆的，因而依据传统的形态特征进行分类鉴定总是带有一定的局限性和主观性，要准确鉴定鹅膏属真菌到某一个种实属困难。

The accurate molecular weights of each components were determined. The amine acid sequences of the main components were analyzed by MS/MS synchronously.

结果证明，粗产物中的主成分即为目标十三肽，另外几个主要副产物为十三肽的残缺肽或氧化肽。

RESULTS: The sequences of cloned adult rat Nogo gene segments (570-691 and 1028-1089 amine acid residues) were identical with those earlier reported.

结果： 获得成年SD大鼠Nogo(570~691和1028~1089氨基酸残基)的基因，测序结果与已发表的基因序列相一致。

The strata in this section cover three lithostratigraphic units, seven conodont zones, five ammonoid zones and three bivalve zones. Two normal and two reversed magnetic polarity zones as well as the cyclic sequences corresponding to the Milankovitch climate periods driven by the Earth's orbit are well recognized in the lower part of the section.

该剖面包括3个岩石地层单元、7个牙形石带、5个菊石带、3个双壳类带；在剖面下段地层中识别出2个正向磁性带和2个反向磁极性带；与地球轨道天文周期相对应的Milankovitch气候沉积旋回也可以明确地辨认；碳氧同位素δ13C演变呈现两次大的旋回。

Comparison of deduced amino acid sequences of amphioxus ACTIVIIN with vertebrate showed that ACTIVIN was conserved.

文昌鱼ACTIVIN基因演绎的氨基酸序列与脊椎动物比较发现ACTIVIN基因比较保守，特别是C-末端生物活性区。

Common wheat ; Wheatgrass ; Amphiploid ; Specific DNA sequences ; RFLP analysis ; Genomic changes ; Polyploid genome evolution

小麦；天蓝冰草；双二倍体；专化DNA序列； RFLP分析；基因组变异；多倍体基因组进化

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。