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Dealcoholization temperature markedly influences the surface area and porosity of the resultant MAO-supports. When the support was pretreated at lower or higher temperature, the corresponding MAO-support shows very low surface area;2.XRD and IR analyses indicate that MAO has reacted with the residual ethanol in the supports, which is an important manner to get MAO fixed on the carrier. Morever, XPS analyse indicates that MAO can also be coordinated with MgCl_2, which is another way to get MAO fixed on the support;3.ICP and EDX analyses indicate that dealcoholization temperature not only determined the element content on the solid catalyst, but also influences the element distribution on the carrier;4.The activities of the supported phenoxy-imine catalysts and the properties of resultant polymers are strongly dependent on the dealcoholization temperature. The support (MSP-5) obtained by treating MgCl_2·2.56C_2H_5OH at 160℃for 4 h, then modified by MAO is very effective for immobilizing complex 3, the resultant solid catalyst (MSPC-5) shows very high activity in ethylene polymerization, and its kinetics of polymerization is stable during the reaction process. Finally, PEs with spherical morphology and high bulk density (over 0.35g/ml) were obtained, without reactor fouling;5.In this work, polymerization conditions such as alkylaluminums, Al/Zr ratio, temperature and H_2 had a pronounced effect on the activity of MSPC-5 and properties of PE;(3). New MgCl_2-Supported Single-Site Catalysts for Ethylene PolymerizationIn this work, a kind of new MgCl_2 support was obtained by anhydrous MgCl_2 co-milled with solid MAO, and it is a creative contribution. Then some single-site catalysts were supported on the new MgCl_2 support, and the resulted solid catalysts were tested in ethylene polymerization, the results indicated that:1.XRD and IR analyses indicate that MAO does be coordinated with MgCl_2, which is in good agreement with the results obtained by XPS;2.co-mlling time had no obvious effect on the texture of support after 12 hours;3.In this work, MgCl_2 was co-milled with solid MAO for different hours, and then complex 3 was supported on these co-milled supports. It was found that co-milling time markedly influences the activity of solid catalysts, but it had negligible effect on the kinetic profile and the properties of resultant PE.

XPS研究结果表明,MAO不仅仅只和乙醇作用,MAO还与MgCl_2本身有一定的作用,这是一个极为重要的发现;3、通过ICP和EDX表征,发现载体的脱醇温度直接影响着元素在固体催化剂中的含量及分布;4、脱醇温度极大地影响着负载苯氧基亚胺类催化剂的活性和聚合物的性能,特别是原始载体经160℃活化4小时制备得到的固体催化剂MSPC-5的活性明显高于其他脱醇温度条件下制得的固体催化,并且催化剂寿命长,表现出稳定的动力学行为,最终获得了高堆密度(大于0.35g/ml)的球形聚乙烯颗粒;5、本文选择MSPC-5为研究对象,考察了聚合反应参数对催化剂的活性及其聚合物的影响,研究发现:不同的烷基铝对催化剂具有非常重要的影响,特别足TIBA对MSPC-5的助催化活性最高,烷基铝的加入量有一个较佳值,聚合温度为80度时活性最高,H_2的加入使催化剂的活性明显降低且聚合物的分子量也减小;、新型氯化镁载体负载单活性中心催化剂催化乙烯聚合本文创造性采用固体MAO与无水氯化镁直接进行共研磨,制备出了一种的新型的氯化镁载体,并将该载体用于多种单活性中心催化剂的负载化研究,研究表明:1、通过BET、XRD的表征,再次证实了MAO与MgCl_2之间具有直接作用,与XPS的研究结果相一致;2、当研磨时间高于12小时时,延长研磨时间对载体的结构没有显著的影响;3、将配合物3负载于共研磨时间不同的一系列载体上,乙烯聚合结果表明,尽管共研磨时间对负载催化剂的活性具有明显的影响,但是它对聚合物的性能以及催化剂的影响不明显。

The complex situations brought about by the emendations of logic to history or the debate on the identity of logic and history will not affect it or change it.

逻辑对历史的&修正&的各种复杂情况,逻辑与历史是否一致的各种争论,都没有影响到或改变这一点。

In the case of short light pulses irradiance, photovoltaic effect has no effect on the writing and erasing photorefractive gratings in the LiNbO3 crystal.

因此,在短脉冲光入射光折变晶体材料情况下,考虑光生伏打效应与不考虑光伏效应,对短脉冲光在光折变LiNbO3晶体中写入和擦除光栅基本没有影响。

Unlike Keynesians, monetarists insisted that money is neutral, meaning that in the long run, changes in the money supply will only change the price level and have no effect on output and employment.

不同于凯恩斯主义,货币主义者坚持认为,货币是中性的,也就是说,从长远来看,货币供给的变化将只改变价格水平,对生产和就业没有影响。

RESULTS: The rates of germinal vesicle breakdown were 98%, 22.2%, 40.1% and the rates of the first polar body (PB1) extrusion were 77.7%, 15.5%, 27.6% for M16, Hx and FA groups, respectively. The rates of GVBD and PB1 were all increased with the addition of FA compared with the Hx groups and comparison was significant (P.05). Hx and FA did not influence chromosome, but FA reversed the size of metaphase spindle elongated by Hx.

结果:M16培养液组、Hx模型组和FA处理组的GVBD率分别为98%、22.2%、40.1%,其PB1排出率分别为77.7%、15.5%、27.6%,各组间的差异均具有统计学意义(P.05);次黄嘌呤和叶酸对染色体的形态没有影响,而次黄嘌呤使正常的纺锤体变长、变宽、面积变大,FA组较Hx模型组增大的纺锤体有所恢复,并接近于正常水平。

The results implied that NO/ROS-induced ABA accumulation come from de novo synthesis pathway rather than degration of conjugated forms. The protein synthesis inhibitor actidone blocked the NO-induced ABA accumulation while having no effects on ROS-induced ABA accumulation, indicating that the action of NO was gene-expression dependent and that of ROS was gene-expression independent. These results suggested that NO may serve as a stress signal in the regulation of ABA-biosynthesis and ROS may serve as substrate in ABA biosynthesis or be involved in the regulation of enzyme activities.

1ABA合成抑制剂fluridone抑制ROS和NO诱导的ABA积累,表明NO/ROS诱导的ABA积累来源于ABA的从新合成而不是已有结合态ABA的代谢;(2)蛋白质合成抑制剂环己亚胺可以抑制NO诱导的ABA积累而对ROS诱导的ABA积累没有影响,说明NO的作用涉及基因表达而ROS的作用与基因表达无关,暗示NO的作用方式可能是作为一种干旱胁迫信号物质参与ABA合成的调节,而ROS则可能参与了相关酶活性的调节或直接参与了ABA合成的底物反应。

The protective effect SAB was likely not related with the expression of grp75. It showed SAB can decreased the Ca(superscript 2+) level of the cells under glucose deprivation.

免疫细胞化学法和RT-PCR结果均显示丹酚酸对grp75表达没有影响;但经SAB作用后,细胞内Ca(上标 2+)浓度明显降低。

Antisense oligonucleotide of Gqα has no effect on Gs and Gi mRNA expression.

Gqα反义寡核苷酸对Gs和Gi的mRNA表达没有影响。

The composition of the pieces — whether wood, steel, or plexiglas — didn't affect the results.

物体的材质——不论是木头、钢铁还是树脂玻璃——对结果没有影响。

And in KYD rats the CK activity in quadriceps decreased also. The activities of PK and MDH in quadriceps were unchanged in KYD rats.

肾阳虚&则造成体内肝、肌糖原的明显减少,骨骼肌中CK活性的显著降低,但对骨骼肌中PK及MDH的活性则没有影响。&

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歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

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