分离能力

Results were shown as followings:(1) Sodium selenite at 0～2.5 μmol/L significantly increased the antioxidative capacity of L-02 cells without having remarkable impact on SMMC-7721 cells;(2) Sodium selenite at concentrations above significantly increased telomerase activity, hTERT gene expression and telomere length of L-02 cells without significant impact on SMMC-7721 cells;(3) Sodium selenite at higher concentrations (larger than 5 μmol/L) resulted in peroxidation of L-02 cells, while scutellarin significantly counteracted its effect;(4) Selenium-rich amino acids from silkworm pupas in the range of 0.5～2.5 μmol/L Se significantly inhibited SMMC-7721 cell growth, induced apoptosis and cell cycle change, and the generation of reactive oxygen species. In contrast, sodium selenite and selenomethionine only had weak impact on them at the same concentrations;(5) A new selenium-containing protein was found from selenium-rich silkworm pupas, which is worthy to be study further;(6) An expression vector containing ansense RNA of hTERT gene were constructed and used to transfect SMMC-7721 cells. They were observed to inhibit hepatoma cells.

结果如下：（1）0～2.5μmol/L亚硒酸钠显著性增强L-02细胞的抗氧化能力；而对SMMC-7721细胞的作用不显著；（2）该浓度硒显著性提高L-02细胞端粒酶活性、增强hTERT基因表达和延长细胞端粒长度；而对SMMC-7721细胞的作用均不显著；（3）高浓度硒（5μmol/L以上）显著性抑制L-02细胞生长、致细胞过氧化，灯盏花素能拮抗硒所致过氧化、降低硒毒性；（4）0.5～2.5μmol/L富硒蚕蛹氨基酸显著性抑制肝癌细胞SMMC-7721生长、导致细胞凋亡和周期改变、诱导细胞产生活性氧，同浓度亚硒酸钠和硒代蛋氨酸对其抑制不显著；（5）富硒蚕蛹蛋白经分离纯化和鉴定后发现存在一新含硒蛋白，其结构和功能有待研究；（6）通过已有的含hTERT基因质粒，成功构建hTERT反义RNA表达质粒，转染SMMC-7721细胞后对其生长具有抑制作用。

In this paper, adopted the method of microorganism pour plate, 28 strains of filiform fungi were isolated from edible fungi waste of our school .Kaolinite suspension was flocculated by the culture broth ,which was regarded as the index to determine flocculating activity and ability to produce flocculant. 10 flocculant-producing strains which had higher flocculating activity were obtained and they were further rescreened.

以发酵液对高岭土悬浮液絮凝效果为指标衡量其絮凝活性及产絮凝剂能力，经过初筛从分离株中筛选出10株具有较高活性的絮凝剂产生菌，并对这10株菌株进一步作复筛试验，最终选出其中一株絮凝剂高产菌暂时定名F_

Six strains of aerobic ammonia oxidisers and three strains of anaerobc ammonia oxidisers were isolated and their ability for ANAMMOX were proved.

从上述富集培养物中分离了6株好氧氨氧化菌和3株ANAMMOX菌，并证实它们都具有ANAMMOX能力。

Based on this, aim at the disadvantage on Wigner Distribution and Fractional Fourier Transform that can't restrain noise interference effectively when be used to detect Linear Frequency Modulated signals interfered by heavy noises, we proposed a improved WD. Simulation results show that this method can restrain noise interference effectively and improve the ability of LFM signals detection. On the other hand, in multi-component cases, WD suffers from the cross-terms, which may impair some of the auto-terms. In order to separate original multi-component signals into components and reconstruct them separately, we can use the method of optimal filtering in fractional Fourier domain. But this method also has a problem that if signals have aliasing in the fractional Fourier optimal domain as well, the reconstructed signals will be distorted. In this thesis, a novel method of quasi Fourier transform is proposed in order to solve the problem of multi-component signal reconstruction, and have good results.

在此基础上，针对Wigner分布和分数维傅里叶变换在处理高噪声背景下线性调频信号检测的问题时存在不能有效抑制噪声干扰的缺点，提出了改进Wigner分布的办法，该方法能够抑制噪声，提高信号的检测能力；针对Wigner分布在处理多分量非线性调频信号时存在干扰项的缺点，以及分数域最优滤波方法在处理多分量非线性调频信号分离重构问题时存在的局限性，该局限性表现为在对最优分数域上也有信号分量重叠的情况进行处理时重构信号发生畸变，提出了新颖的类傅里叶变换的方法，该方法对在最优分数域上也有信号分量重叠的情况也能处理，得到的重构信号失真很小。

The recombinant plasmid pQEM1 could steadily exist in the X4064 strain of S. typhimurium,without influence on its invasion into host cells.X4060（pQEM1）strain isolated from infected mice still had the ability to re-express M1 protein.

重组pQEM1质粒能稳定地存在于减毒鼠伤寒杆菌X4064株中，不妨碍其入侵宿主细胞，从小鼠组织中分离到的X4064(pQEM1)依然具有表达M1蛋白的能力。

A batch of strains were isolated from such lignocellulose as moldy rice-straw, wheat-straw and deadwood and leaves by using the degradation rate of ricestraw as index. One fungi that could degrade rice-straw relatively completely was obtained.

以稻草降解率为指标，以稻草粉为唯一碳源，从霉变的稻草、麦秸、枯枝烂叶等天然纤维素中分离获得一批天然纤维素降解菌，并从中筛选出1株对稻草降解能力较强的真菌。

Interfacial surface tension is the resistance to separation possessed by a film of liquid between two well-adapted surfaces. It is the result of the cohesive forces acting at the surface of the liquid.

界面表面张力是指两个具有良好密合性被液体薄膜粘附的界面抵抗被分离的能力。

Endophytic Bacillus subtilis strain B47,which was isolated from the stem of tomato, was an efficient biological control agent on tomato bacterial wilt. A strain resistant to streptomycin derivative of wild strain B47 was used to study the colonization ability and fluctuation of populations in soil and tomato organs, and its biological control on tomato bacterial wilt.

从番茄茎分离的内生枯草芽孢杆菌菌株B47对番茄青枯病有较好的防治作用，利用该菌株的抗链霉素突变菌株，研究其在土壤和番茄植株根，茎中的定殖能力及其对番茄青枯病的防治作用。

The numerical analysis shows that the forward-curved impeller can make full use of the capability of fitting the negative incidence range and its internal flow performance is better than that of the baseline, and the forward-curved swept-back impeller can improve effectively the serious separation near the shroud and hub occurred in the baseline.

数值分析表明：前弯叶轮充分利用了其对负冲角工况的适应能力，内流特性优于常规设计的近似径向进口型线叶轮；而进一步发展的前弯后掠叶轮明显改善了原型叶轮轮壳和轮毂处严重分离的现象。

The bottom plate structure of screen box can be converted in order to improve grading ability.(5) It can adjust vibration frequency of screen boxes productivity and separation rate as needed.

筛箱底板结构可以转换，使分级能力提高；（5）筛箱振动频率可调，生产率和分离率可根据需要进行调节。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了