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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。
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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 Polymerization In 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。
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By polarized FT-IR spectra and Grazing Incident-IR spectra the molecules in the LB films were found to show apparent dichromism.
掠角反射红外光谱与透射红外光谱比较及偏振红外光谱实验发现LB膜中分子取向表现出了明显的二向色性,显示在MⅢ和PⅠ的LB膜中介晶基取向趋于垂直于膜面,表面压力升高时更是如此。
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In Chapter 5, photo-induced absorption is used to study the intersystem crossing from singlet to triplet states of two polyfluorenes after doped with Ir-complex. It is found that the triplet exciton lifetime of PFs is reduced by the dopants. But instead of decreasing, the population density of PF triplet exciton increases by almost one order of magnitude. The finding shows that the ISC rate can increase over 100 times due to the spin-orbital interaction with the Ir ions.
第五章以光诱发吸收光谱技术研究两种聚芴高分子掺杂绿光铱错合物后,聚芴的单重态到三重态的内部系统转换效率的改变;研究发现在掺杂后,聚芴的三重态生命期减短,但出乎意料的是其三重态的态密度并没有随之降低反而有一个数量级的增加,其原因为单重态到三重态的内部系统转换受铱错合物的影响效率增加了100倍。
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For both series of heteroleptic tris rare earth compounds, the characteristic phthalocyanine dianion IR bands for Pc2- and O OPc2- at ca. 1329 and 1380 cm-1 attributed to the pyrrole stretching and the symmetric C-H bending of -CH3 groups in octyloxy side chains of OOPc rings together with some small contribution from the isoindole stretching vibrations,re specteively,are simultaneously found in their IR spectra.
在这两个不对称三明治型稀土配合物系列的红外光谱中发现了这样一种特性,即酞菁阴离子Pc~(2-)和OOPc~(2-)的特征波段在1329cm~(-1)和1380cm~(-1)之间,这是因为吡咯的伸缩振动和OOPc环中八烷氧基侧链上-CH_3基团的对称C-H的弯曲振动共同作用于吲哚环的伸缩振动。
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Results: Compared with IR group , XSOL could significantly decrease the cerebral water content, the cerebral index, the brain vascular permeability in rats of acute incomplete brain ischemia-reperfusion (P.01,P.05). Cerebral tissue morphology showed that neuronic damage of rats subjected to acute incomplete brain ischemia-reperfusion was ameliorated following administration of XSOL (2.4, 9.6g/kg). Compared with IR group , XSOL could significantly decrease the content of MDA and NO in brain tissue(P.01,P.05)and increase SOD,GSH-px activity. The levels of cerebral Glu,Asp were cut down(P.01,P.05). Conclusion: XSOL shows protective effects on cerebral ischemia-reperfusion.
结果:与缺血再灌注组比较,XSOL大、小剂量组可以显著降低急性不完全性脑缺血再灌注模型大鼠的脑含水量(P.01,P.05)、脑指数(P.01,P.05)、脑毛细血管通透性(P.01,P.05);光镜下脑组织形态学显示各剂量组可不同程度的减轻急性不完全性脑缺血再灌注大鼠脑组织的神经元受损形态;与缺血再灌注组比较,XSOL大、小剂量组可以显著降低缺血再灌注大鼠脑组织中的MDA的含量(P.01,P.05),升高SOD、GSH-Px在脑组织中的活性(P.01,P.05);XSOL大、小剂量组可显著降低脑组织中NO的含量(P.01,P.05),降低脑组织中Glu、Asp含量(P.01,P.05)。
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Compared with control group, there were significant increasein the number of ER_α-IR cells in the DG and Me, and significant reduction in that ofER_β-IR cells in the CA1, CA2, CA3 and increase in the Me.
免疫组化结果显示:与正常对照组相比,ER_α的阳性表达在海马DG出现明显上升,而ER_β的阳性表达在海马CA1、CA2、CA3三区均出现明显下降;此外,ER_α和ER_β的阳性表达在Me均出现明显上升。
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Type 2 diabetic patients show lower transcription of adiponectin mRNA in omental adipose tissue than that of non-diabetic control.
2 型糖尿病患者大网膜脂肪组织脂联素 mRNA 达显著降低,其表达水平可以作为胰岛素抵抗的重要参数;WC、TG、FBG、WHR、病程等临床指标,可间接反应 IR 的程度,而且以 WC 的参考意义最大;糖尿病的病程尤其是 5 年以上的病程也可以作为 IR 的一个重要参考指标。
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Hexachlorocyclophosphazene was prepared using phosphorous pentachloride and ammonium chloride as raw material, hccp was mixed with Montmorillonite which aimed to decrease MMT.'s hydrophilicity. Solid state reserve cell of Mg│reformed MMT.│polymer gel containing water│graphite was assembled, and cell performance was tested. XRD and IR results show: When mass percentage lower than 9.1%, hccp mixed with MMT to form homophase, hccp phase was observed in the mixture when percentage higher than 9.1%, for hccp specific diffraction peak appears in XRD data, and 1220cm-1 which was assigned to P=N double bond 's expand vibration appears in IR data.
合成了六氯环三磷腈,并用六氯环三磷腈与蒙脱石混合对其改性,期望能减小蒙脱石的吸水性能;组装电池Mg |改性蒙脱石|含水凝胶|石墨片,并测试电池的性能。X射线粉末衍射数据和红外光谱数据表明:蒙脱石容纳六氯环三磷腈的质量分数在4.8%-9.1%之间,可与蒙脱石形成单一物相,但混合质量分数大于9.1%时,改性蒙脱石出现六氯环三磷腈的特征衍射峰,和1220 cm-1的六氯环三磷腈P=N双键的特征伸缩振动峰,证明为蒙脱石与六氯环三磷腈的两相混合。
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Clause en Kaan architectural office was founded by Prof. Ir. F.M. Claus (1956) and Prof. Ir. C.H.C.F. Kaan (1961) in 1987.They work on architecture design restauration and renovation, interior and urban planning.
克劳斯·因·康建筑师事务所1956年由费利克斯·克劳斯(1956)和卡斯·康(1961)创立,事务所业务涉及建筑设计、建筑维护和翻修、室内和城市规划。
- 相关中文对照歌词
- Crei Morir E Ir Al Cielo
- Me Iré
- Me Iré
- Me Iré
- Iré A Buscarte
- ¿Dónde Iré Yo?
- Te Iré A Buscar
- Me Iré
- Hoy Me Iré De Casa
- Pode Ir Embora
- 推荐网络例句
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Do you know, i need you to come back
你知道吗,我需要你回来
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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.
1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。
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Chapter Three: Type classification of DE structure in Sino-Tibetan languages.
第三章汉藏语&的&字结构的类型划分。