Materials Literature
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为了研究甲氧苄啶（Trimethoprim,TMP）与羟丙基-β-环糊精（HP-β-CD）在水溶液中的包合作用、包合过程中的热力学参数变化及包合比,试验分别采用相溶解度法、等摩尔系列法、摩尔比率法测定了TMP与HP-β-CD的包合表观常数、包合过程的熵变、焓变、自由能变化及包合比。结果表明,在不同温度下,TMP与HP-β-CD在水溶液中均可形成1∶1摩尔比的包合物,相溶解度图呈AL型;TMP与HP-β-CD的包合过程可自发进行（△G〈0）,且为放热反应（△H〈0）,同时也是熵值增大的过程（△S〉0）;说明TMP与HP-β-CD在水溶液中均可自发形成1∶1摩尔比的包合物,从而增加其溶解度。选择适宜的包合温度将有利于包合过程的进行。
采用酸析-混凝-微电解组合工艺预处理精制棉黑液，研究pH对处理效果的影响。采用紫外-可见分光光度法和急性毒性试验研究组合工艺对精制棉黑液成分变化的影响。结果表明，各阶段最佳pH条件为：酸析pH=2；混凝pH=12；微电解pH=4～5。通过组合工艺预处理，精制棉黑液的COD由5400mg／L降至1900mg／L，去除率为65％；BOD5由2860mg／L降至1080mg／L，去除率为62％；TOC由2080mg／L降至906mg／L，去除率为56％；黑液色度由原水的4500降至50，去除率为99％；50％抑光率稀释比（LIR50）由250降至17，急性毒性降低93％；紫外可见吸收光谱结果显示，部分含共轭双键和苯环的难生化降解物质得到…
Abstract Light weight structural materials are in high demand these days due to the limited oil and gas reserves and global inclination to reduce the green house gas (CO 2 ) emission. Magnesium based materials are the lightest engineering materials in the earth. Magnesium alloys that contain aluminium and zinc are kno…
Abstract Cobalt (Co) turnover frequency (TOF) has been reported to be independent of Co dispersion and support type. However, wide discrepancies in Co TOF values exist in the literature. Differences in catalyst preparation, process conditions, and characterization technique could be major factors that may account for…
E-mail: chk@inha.ac.krReceived August 29, 2011, Accepted September 19, 2011Key Words : DSSCs, Dye-sensitized solar cells, High efficiency, DinaphthylphenylamineRecently, dye-sensitized solar cells (DSSCs) have at-tracted great attention because they have advantages inconverting solar energy to electrical energy at low…
Abstract The use of promising solid-state adsorbents is an emerging field in carbon dioxide capture and storage (CCS) owing to their promising sorption capacity and facile regeneration behaviour. Hydrotalcites, a class of layered double hydroxides (LDHs), are specifically suitable for high capacity CO 2 sorption studi…
Abstract Introduction: Controlled drug release from implantable silicone elastomers was reported to occur mainly via the osmotic rupture release mechanism. In this work, we are attempting to determine the effects of drug volumetric loading, particle size, device shape, and dissolution media on the release rate of the…
Abstract Cardiac hypertrophy (CH), a prominent feature that predisposes the heart to failure, is associated with the activation of multiple molecular and cellular changes in the circulation and heart. The Na+/H+ exchanger isoform 1 (NHE1) has been implicated in the development and progression of CH. To better understa…
Abstract Natural gas and oil processing, among many other applications in the chemical industry, depends on accurate predictions of the thermodynamic and transport properties for their accurate and reliable design. Especially in the energy sector, in which the flow rates of process streams are large and equipment is b…
Abstract Nanotechnology is regarded as the next great scientific/industrial revolution due to the possibility of designing nanostructured materials that possess novel electronic, optical, magnetic, and catalytic properties. Nanomaterials could potentially be applied in pollution control, catalysis, water remediation,…
Abstract Each olfactory sensory neuron in the mammalian nose selects just a single member of the large odorant receptor (OR) gene family. The core processes regulating OR selection may involve mechanisms that limit initial OR transcription and once a single OR is chosen, repress subsequent activations. We have used a…
采用微波辅助均相沉淀法制备了Nd:YAG(Nd:Y 3 Al 5 O 12 )纳米粉体. 通过XRD和SEM对此方法制备的Nd:YAG纳米粉体进行了分析表征, 并分析了在陈化过程中, 湿度、温度和陈化时间对制备Nd:YAG纳米粉体的影响. 实验结果表明: 陈化环境的湿度、温度和陈化时间对制备Nd:YAG纳米粉体的组分和形貌有显著的影响. 陈化环境中湿度和温度对Nd:YAG纳米粉体的影响具有一定的依存关系, 必须适当地控制; 陈化时间对Nd:YAG纳米粉体的粒径大小影响显著, 随着陈化时间的延长, 获得的Nd:YAG纳米粉体的颗粒尺寸先减小后增大.
Carboneous catalytical methane decomposition is an attractive process because it produces two valuable products: hydrogen and carbon. Furthermore, this reaction does not emit any green house or hazardous gases. In the present study, experiments were conducted in a thermo gravimetric analyzer using Fluka 05120 as carbo…
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利用射频磁控溅射制备了氮掺杂TiO2-xNx薄膜托槽,通过X射线衍射(XRD)、扫描电镜(SEM)等测试手段表征了托槽表面薄膜的结构、形貌,并通过原子力显微镜(AFM)、多功能材料表面试验仪等研究了TiO2-xNx薄膜与基底托槽的附着力、TiO2-xNx薄膜托槽的表面粗糙度以及表面摩擦系数。结果表明制备的托槽表面为均一的锐钛矿相结构TiO2-xNx薄膜,晶粒粒径为30nm,纳米TiO2-xNx薄膜托槽表面致密、平整,薄膜与托槽衬底结合紧密、附着性好,托槽表面粗糙度降低,摩擦系数变小,改善了托槽表面性能,为抗菌性研究奠定了基础。
Abstract In the UV-Vis spectra of pure light-scattering systems, there is an exponential relationship between absorbance and wavelength (A = Kλ–n). Here, the exponent n is named as flocculation-coagulation parameter. In the present paper, the effects of different additives on the stability of poly(N,N ′-methylenebisac…
We perform molecular dynamics (MD) simulations with phonon spectral analysis aiming at understanding the two dimensional (2D) thermal transport in suspended and supported graphene. Within the framework of equilibrium MD simulations, we perform spectral energy density (SED) analysis to obtain the lifetime of individual…
Shearing solutions of fibers or polymers tends to align fiber or polymers in the flow direction. Here, non-Brownian rods subjected to oscillatory shear align perpendicular to the flow while the system undergoes a nonequilibrium absorbing phase transition. The slow alignment of the fibers can drive the system through t…
Abstract The interest in using alternative fuels in commercial aviation has substantially grown, as it is anticipated to be the principal means of mitigating rising fuel costs, fuel supply security, and environmental impact of aviation. Synthetic paraffinic kerosenes (SPKs), such as gas-to-liquid (GTL) derived from th…
We have investigated the time evolution of a cloud of non-Brownian particles subjected to a periodic shear flow in an otherwise pure liquid at low Reynolds number. This experiment illustrates the irreversible nature of particulate systems submitted to a shear. When repeating the cycles of shear, we have found that clo…