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After removing the catalyzer by dense muriatic acid, carbon nanotubes are reacted with mix acid (vitriol:nitric acid=3:1 vol./vol.). By comparing the surface image of gained carbon nanotubes under the different condition, the best mix acid oxidation temperature is fixed on 140°C and the reaction time is 30min. The soluble carbon nanotubes were prepared by decorating of octadecylamine on the surface of nanotubes. Three processes of grafting were investigated in this research.
对碳纳米管的热失重、差热分析结果表明,通过在一定温度下空气氧化可去除大部分碳颗粒;而浓盐酸浸泡可去除碳纳米管制备过程中残留的催化剂颗粒;对在不同条件下与硫酸和硝酸配制的混酸反应处理后得到的碳纳米管的表面形貌研究表明最佳混酸氧化条件为140℃氧化30min。
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The results indicated that both weight and mechanical property of resins decreased by environmental complex fungouds,the weight losses of sheets of gels in 60d were 9.41%、20.65% and 18.60%,the deformation ratios of sheets of gels were 23.5%,25.1% and 26.4% respectively. Mono-germ and mono-fungus tests showed obvious growth of fungoids on the surface of SA/NaAA/AM and SA/NaAA/PVA gels,and slight growth on the surface of SA/NaAA gel.
研究结果发现,环境混合霉菌降低了海藻酸钠复合吸水树脂的质量和力学性能,60d试片失重率依次为9.41%、20.65%和18.60%,试片的破坏形变百分率下降依次是23.5%、25.1%和26.4%;单一细菌和真菌降解实验显示,菌群在含有AM和PVA的SA/AA/AM和SA/AA/PVA凝胶中呈现中度或深度生长状态,在SA/AA凝胶表面呈现轻度生长。
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Firstly, micron-size monodisperse polystyrene particles were prepared by emulsifier-free polymerization. Then the photo-initiator with double bond and ester group were attached on the surface of the PS particles by copolymerization using "starve" addition together with styrene. Finally both poly and poly(N-isopropylacrylamide) as hybrid hairy homopolymers were grafted on the surface of the PS particles by "grafting from" photo-initiation with sequential addition of AA and NIPA.
首先,通过无皂乳液聚合法合成亚微米级单分散聚苯乙烯微球种子,半连续补加法表面负载光引发剂,运用"从表面接枝"技术及顺序添加相关单体的工艺这三步法,成功制得表面含电解质PAA及温敏性PNIPA的混合型毛发,探讨其制备过程和特性研究,表明PAA链的存在对PNIPA链的温敏性有明显影响。
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Environment radon is mainly from rock and soil in geological environment, but the research is not connected with geological environment now. On the basis of physical field, the theoretical distribution model of radon in soil and exchange model of earth—air are set up by using Fick diffusion law and Dacy law, and then the research of environment radon is linked with geological environment. This paper described how the evry parameter of the theoretical model influence the radon concentration in air. The results of research indicat that molecule diffusion of radon is different from it's eddy form. Under the condition of surface radon source, the model experiment is used to study the transportation and distribution of radon in medium. The data of experiment show the relationship between radon and depth can be described by exponent. If the radioelement is well—distributtion, the concentration of radon in different depth or in different point at the same depth change with time, but the accumulated exhalation amount of radon at different point on the surface of model are close in relative long time. The author studied the exchange of radon between mediums and verified the theoretical models too.
环境氡主要来自岩石、土壤,而目前环境氡研究中与地质环境结合很少,为此作者以物理场为基础,运用气体运移的费克扩散定律和达西定律,建立起壤中氡浓度分布与大地—大气间氡交换理论模型,首次在理论上将环境氡与地质环境结合起来;论文中从理论上讨论了模型中各参数对空气中氡浓度的影响,发现空气中氡运移的分子扩散方式和湍流扩散方式存在明显差异;通过面状氡源条件下的氡运移模型实验,研究了介质中氡的运移与分布,实验数据表明氡浓度随深度的变化规律可用指数函数描述,在放射性元素分布均匀的条件下,介质中不同深度和同一深度不同点的氡浓度随时间而变,但介质表面不同点在较长时间内向空气中累计释放的氡的量是相近的;同时研究了不同介质间氡的交换,并验证了所建立的理论模型;运用理论模型预测青岛市城区壤中氡浓度、江西临川一住宅区空气中氡浓度及江西二个测区的区域空气中氡浓度分布,取得了较好的效果。
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In order to know of the chemical characteristics on the surface of the mineral dust in snow and ice, and find out whether the atmospheric physical and chemical processes of mineral dust can impact the ice core records, X-ray Photoelectron Spectrometer was first applied into the study on the surface chemistry of mineral dust sampled from snow and ice.
为了能够了解冰雪中矿物质粉尘的表面化学特征,揭示粉尘大气物理和化学过程对冰芯记录的影响的证据,我们首次把应用于冰雪中矿物质粉尘的表面化学研究中来。
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The directly electroless nickel plating, the stannate conversion processing and the electroless nickel plating on the surface of the magnesium alloys that have formed the stannate chemical conversion film on their surface were researched.
论文摘要:本文以AZ91D合金为研究对象,对其进行直接化学镀镍、锡酸盐化学转化处理以及在形成锡酸盐化学转化膜的镁合金表面进行化学镀镍。
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The ligand encoded by SCR gene is a small pollen coat protein present on the surface of pollen grains. The receptor localized to the plasma membrane of the stigmatic papillae on the surface of the pistil is encoded by SRK gene.
配体是位于花粉粒表面的一个小的胞被蛋白,由SCR基因编码;受体是位于柱头乳突细胞原生质膜上的跨膜的蛋白质激酶,由SRK基因编码。
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When the temperature became higher, the O and N impurity absorbed on the surface of powder reacted with catalyst and formed inertial compositions, wrapped on the surface of graphite powder, then the process of transformation stopped.
在较高温度下,纳米石墨表面吸附的含氮、氧等官能团与熔体金属发生反应生成惰性固态化合物并包裹在石墨表面,阻止了石墨的进一步溶解。
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Both the offset and tilted fedcoupling-slot array between the curved guide and sectoral guides and longitudinal radiating-slot array on sectoral guide are analyzed by moment method, taking into account of the effects of finite wall thickness and mutual coupling between the slots, employing the acceleration algorithms to accelerate the summation of slowly convergent series of the self-admittance of the waveguide-slot aperture, and introducing the surface Fock functions to simplify the computation of the self-and mutual coupling of the slots on the surface of cylinder.
采用矩量法分别分析弯波导与扇面波导间偏置倾斜馈电耦合缝阵和扇面波导轴向辐射缝面阵,其中计及有限波导壁厚及缝间互耦的影响,运用级数加速算法对波导中自导纳矩阵元级数进行加速处理,并引入表面Fock函数简化圆柱面上缝口面的自耦和互耦的计算。
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Conventional microscope will normally illuminate the whole cell, which is called 'total internal reflection microscopy' new microscope, only to illuminate gathered on the surface of the HIV virus, thus To focus on the cell surface and its subtle details.
传统显微镜一般会照亮整个细胞,而这种被称作'全内反射显微镜'的新显微镜,仅仅照亮聚集HIV病毒的细胞表面,从而把注意力放在细胞表面及其细微的细节上。
- 推荐网络例句
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Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".
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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This is Kate, and that's Erin.
这是凯特,那个是爱朗。
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Articulate the aims, objectives and key aspects of a strategic business plan.
明确的宗旨,目标和重点战略业务计划。