Materials Literature
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A known $Hg^{2+}$ selective rhodamine B derivatised probe 1 was reinvestigated as a colorimetric and fluorescent probe for $Cu^{2+}$ through changing the applied solvent media. Probe 1 exhibited good selectivity and sensitivity to $Cu^{2+}$ in $CH_3CN-H_2O$ (7:3, v/v, HEPES 10 mM, pH 7.0) solution with a detection lim…
In this study, laminated veneer lumbers were produced with rotary peeled veneers from eucalyptus, beech and poplar using urea-formaldehyde, melamine-urea-formaldehyde and phenol-formaldehyde adhesives. Air-dried density, equilibrium moisture content, thickness swelling, and water absorption were determined. The obtain…
Ti-6Al-4V titanium alloy is widely used in industrial applications such as aeronautic and aerospace due to its good mechanical properties at high temperatures. The aim of the work is to determine the heat capacity of the thermal cycled titanium alloy. The cylindrical specimens of dimension 3 ± 0.1 mm in diameter and 2…
Two-dimensional direct simulation Monte Carlo (DSMC) was used to investigate the effect of wall accommodation on different modes of operation of a nozzle under high Knudsen number conditions. Substantial performance enhancement was seen at higher values of converging–diverging angles, because a reduction in the surfac…
The geometries, electronic structures, polarizabilities and hyperpolarizabilities of organic dye sensitizer 4-methoxybenzonitrile was studied based on Ab Initio HF and Density Functional Theory (DFT) using the hybrid functional B3LYP. Ultraviolet-visible (UV-Vis) spectrum was investigated by Time Dependent DFT (TDDFT)…
Transition metal chalcogenosphosphates form a wide and interesting class of compounds that have attracted attention because of their various structural chemistry and interesting properties. Many ternary and quaternary compounds have been synthesized in this class. These materials have various phosphorus-sulfur/seleniu…
以单晶Si (100)为基底, 采用无机溶胶–凝胶法在其表面制备W-Mo复合离子掺杂VO 2 薄膜。采用SEM、XRD等手段分析了薄膜的表面形貌和晶体结构。在热驱动下, 利用原位FTIR分析了W-Mo复合离子掺杂VO 2 薄膜半导体–金属相变性能。结果显示: 单晶Si (100)表面VO 2 薄膜具有(011)择优生长取向, W 6+ 、Mo 6+ 取代了V 4+ 在晶格中的位置, 实现置换掺杂。热滞回线分析表明, 与未掺杂VO 2 薄膜相比, V 1- x - y Mo x W y O 2 薄膜相变温度降低, 滞后温宽减小, 同时相变陡然性变差, 相变温宽增大; 在相变温度区间内, 温度路径对红外透过率具有调制效果, 其调制作用…
Catecholamine mimetic EDTA-bis(tyramide) was synthesized and characterized by various spectroscopic techniques (NMR, mass spectroscopy) and λem 310 nm for the excitation at 270 nm. Molecular docking studies were performed with human serum albumin (PDB 1E78), showing binding pattern with amino acid residues Arg218, Arg…
With - $OCH_2CO$ - as a linker, a non ${\beta}$ -substituted cationic bisporphyrin (4a) and a ${\beta}$ -substituted cationic bisporphyrin (4b) were prepared through methylation of the intermediate which was obtained from ${\beta}$ -amino-5,10,15,20-tetra (4-cyanophenyl) porphyrin or 5-hydroxylphenyl-10,15,20-tris(4-c…
采用液相沉淀法, 制备了在片状铝粉表面包覆Cr 2 O 3 的复合粉体颜料, 利用XRD、SEM、UV/VIS/NIR分光光度计、FTIR红外光谱仪等方法对颜料相结构、形貌、光谱及红外反射特性等进行了测试表征。结果表明, Cr 2 O 3 包覆层对光谱反射特性的影响随波长变化而异, 波长越短, 包覆前后反射率的变化越大。当Cr 3+ :Al摩尔比为0.2:1.0时, Al/Cr 2 O 3 复合颜料在可见光波段的反射率下降接近50%, 颜色明度参数 L *降低15, 而8~14 μm波段红外反射率下降不到10%。分析表明, 包覆层对不同波长辐射的吸收系数以及表面粗糙度的差异导致了上述结果。该复合颜料对于低明度和光泽度的低红外发射率…
Pretreatment is an essential step in the conversion of lignocellulosic biomass to fermentable sugar that used for biobutanol production. Among pretreatment processes, microwave is considered to improve pretreatment efficiency due to its high heating efficiency, easy operation, and easily to combine with chemical react…
Yong Hong ZhouSchool of Chemistry and Material Science, Huaibei Normal University, Huaibei 235000, People’s Republic of ChinaE-mail: zhou21921@sina.comReceived September 24, 2012, Accepted January 26, 2013Key Words : Cadmium(II), Coordination polymer, 1,1'-(1,4-Butanediyl)bis(imidazole), Crystal structure, Flu-orescen…
Benzodithiophene based organic semiconducting polymer was designed and synthesized by stille coupling reaction. The structure of polymer was confirmed by NMR and IR. The weight average molecular weight ( $M_w$ ) of polymer was 8,400 using GPC with polydispersity index of 1.4. The thermal, optical and electrochemical p…
Transport resistance of reactant gases in the membrane of polymer electrolyte fuel cells (PEFCs) was investigated by measuring the mass transport amount of gas species with microprobes inserted along the membrane thickness direction. The diffusion resistance inside the membrane and the interfacial transport resistance…
Two new metal-free organic dyes bridged by anthracene-mediated ${\pi}$ -conjugated moieties were successfully synthesized for use in a dye-sensitized solar cell (DSSC). A N,N-diphenylthiophen-2-amine unit in these dyes acts as an electron donor, while a (E)-2-cyano-3-(thiophen-2-yl)acrylic acid group acts as an electr…
In this paper, the design procedure and results for 'Residual Life Prediction System Considering Corrosion and Coating' are explained, which is one module of 'Life-cycle Management System of Ship and Offshore Plant's' Operation. This 'Residual Life Prediction System' has two main functions; one is residual life predic…
Transdermal drug delivery of proteins is challenging because the skin acts as a natural and protective barrier. Several techniques including using the cell-penetrating peptides have been studied to increase the penetration of therapeutic proteins into and through the skin. Cell-penetrating peptides facilitate and impr…
Transparent $TiO_2$ thin films have been prepared by sol-gel spin coating method. The sols used for deposition of thin films were prepared with different ethanol content. The effect of ethanol (solvent) concentration and annealing temperature on the performance of $TiO_2$ thin film solar cells has been studied. The re…
Abstract The flexural Young’s modulus of western hemlock, medium-density fiberboard, and 5-plywood (made of lauan) has been determined by conducting three- and four-point bending tests with various span lengths and by flexural vibration test. The Young’s modulus was significantly influenced by the deflection measureme…
E-mail: mho@sunchon.ac.krReceived December 12, 2012, Accepted January 28, 2013Nanocomposites consisting of Sn nanoparticles and graphene oxide (GO) were electrophoretically depositedonto Cu current collectors that was used for anodes in Li ion batteries (LIBs). In order to optimize theelectrochemical performance of na…