bluuebunny/crossref_metadata_2025 huggingface dataset:
Applications of Titanium Sheets in Modern Building Construction
Authors: Adamus Janina
Published: October 2014

Titanium is most likely to play more important role in future civil applications. Its excellent properties such as: low density, high mechanical strength and good corrosion resistance give it some advantages and open the way for new applications both in modern technology and civil engineering. In many ways (e.g. specific strength, corrosion resistance) titanium, especially its alloys outstrip typical structural materials such as steel and aluminium alloys. The article discusses properties of titanium and its alloys, which are especially important in civil engineering applications due to their properties: low density, resistance to sea water and salty atmospheres of seashores, low coefficient of thermal expansion and excellent aesthetic qualities. Although the use of titanium in civil application is still limited it is expected that a demand for titanium building materials will steadily grow in the future. The characteristic titanium applications in the worldwide civil engineering are presented. It is highlighted that despite high cost of titanium relative to other materials, over a long span of 20 or more years titanium tends to be cheaper in terms of life-cycle costs. Furthermore, the article investigates the difficulties and opportunities associated with shaping titanium sheets. In the paper, some technological problems (e.g. low drawability, high susceptibility to galling and high spring-back) occurring in the sheet-titanium forming processes are discussed.
Self-Assembled Core-Shell Fe3O4@SiO2 Nanoparticles with High Magnetic Sensitivity from Electrospun Fibers
Authors: Tian Li Qiang , Zhang Pei Pei
Published: October 2014

Nanofibers composed of the hydrophilic polymer polyvinylpyrrolidone K90 (PVP), cetyltrimethylammonium bromide (CTAB), tetraethyl orthosilicate (TEOS) and Fe3O4were fabricated using an electrospinning process. As a result of the templating and confinement properties of the nanfibers, silica coated magnetite (Fe3O4@SiO2) core-shell nanoparticles (NPs) with high magnetic sensitivity were spontaneously formed through molecular self-assembly when the fibers were added to 80% aqueous ethanol (PH=9.0). The typical saturation magnetization of the Fe3O4@SiO2composite particles is up to 43.8 emu/g, with superparamagnetic properties being observed at room temperature. Since the nanoparticles have high magnetic sensitivity and are preparedviaa facile and convenient strategy, they have much promise in a range of practical applications.
Study on Heavy Metal Ion Adsorption of PAN-Amidoxime Nanofiber Nonwoven Material
Authors: Li Zong Jie , Ma Yu Hao , Hu Min , Kang Wei Min , Cheng Bo Wen
Published: October 2014

In this study, polyacrylonitrile-amidoxime nanofibers were prepared by combining the technique of electrospinning and chemical modification with hydroxylamine chloride. Before modified the Polyacrylonitrile (PAN) nanofibers were bonded with two layers Ethylene-Propylene Side By Side (ES) thermal bonded nonwovens to improve its mechanical strength. Subsequently, they were applied to adsorb copper ions. The results of FT-IR spectra and scanning electron microscope indicated that nitrile groups in PAN were partly converted into amidoxime groups and there were no serious cracks on the surface of PAN-amidoxime nanofibers. The adsorption data of Cu (II) ions was fitted roughly with the Langmuir isotherm. The maximal adsorption capacities of Cu (II) ions reached 176 mg/g.
Preparation and Luminescence Properties of Eu3+ Doped Niobium Silicate Glass Ceramics
Authors: Song Qiong , Su Chun Hui , Zhang Hong Bo , Zhu Xiao Wei
Published: October 2014

niobium silicate glass with the mass composition of 35SiO2-25Nb2O5-20Na2O-10K2O- 7B2O3-3Eu2O3was synthesized by a traditional glass melting method. Glass ceramics containing Na2Nb8O21nanocrystals were prepared by heat treating the glass samples. The results of X-ray diffraction (XRD) indicated that the crystallite in the glass ceramics is Na2Nb8O21nanocrystals. The luminescence spectra showed the emission intensity of Eu3+doped glass ceramics was stronger than that of the glass matrix, and increased with the heat treatment temperature increasing..The transmittance of the glass ceramics can be up to 80% in the near-infrared light area.
Synthesis and Optical Properties of Asymmetric Naphthylmethylene 1,3,4-Oxadiazole Derivatives
Authors: Tan Ting Feng , Wu Bian Peng , Bai Li Gang , Li Yan Xia , Zhang Ming Jie
Published: October 2014

Asymmetric 2-p-nitrophenyl-5-naphthylmethylene-1,3,4-oxadiazole and 2-p-aminophenyl-5-naphthylmethylene-1,3,4-oxadiazole were synthesized and characterized by IR、1HNMR and MS analysis, and their optical properties were detected using UV-vis absorption spectroscopy and fluorescence spectroscopy. The existence of electron-withdrawing oxadiazole units causes a significant bathochromic shift of the UV absorption maximum. The largest UV-absorption peak of target compounds is in the range of 298-317 nm, and a new emission band at 402 nm is formed. The fluorescence intensity is gradually enhanced, which strengthens the intramolecular charge transfer effect between the electron-withdrawing oxadiazole and electron-donating aniline.
Effects of Grain Sizes and Impurities on Thermal Conductivity in Aluminum Nitride
Authors: Cai Xue Mei , Zhou Qian Neng , Wang Jing Mei , Wang Bao Ying
Published: October 2014

The effects of grain sizes and oxygen impurities on thermal conductivity in aluminum nitride (AlN) ceramics has been calculated by density functional perturbation theory (DFPT) and quasi-harmonic approximation (QHA) combined with Debye theory in the paper. From 300K up to 1000K, the predicted thermal properties are compared with experimental data. The agreements with experiment suggest that the theoretical method used in the paper is an effective approach. From our theoretical study, the reduction of thermal conductivity is greater between grain sizes of 1μm and 5μm, while it’s smaller between 8μm and 10μm. Oxygen defects bring about greater influence on thermal conductivity at low temperature than at high temperature. The influence of the oxygen defect is not as significant as the grain sizes when the oxygen concentrations are less than 0.70 at. %, so it’s more important to increase the grain sizes than reduce the oxygen contents in the preparation process to achieve high thermal conductivity AlN ceramics.
Fast Optical Switching Using Cyanine Dye-Doped Nematic Liquid Crystal
Authors: Gao Hua Jing , Jin Zhao Hui
Published: October 2014

Two kinds of cyanine dye were doped respectively in 4-cyano-4'-pentylbiphenyl (5CB) at a concentration ca. 1.0 wt%, and the mixture was sandwiched between two pieces of rubbed glass plates. The third-order nonlinear optical responses of cyanine dye-doped 5CB layers were measured for light polarized parallel to the oriented direction by the resonant femtosecond forward degenerate four-wave mixing technique at 820 nm. The time resolution of the system was ca. 0.3 ps. The amplified spontaneous emission spectra of cyanine dye-doped 5CB layers indicate that the decay of the slow response was accelerated with increasing laser power. The population grating disappears within ca. 5 ps.
Effects of Dilute Alkali Pretreatment on Chemical Components and Fermentable Sugars and Structure of Bamboo
Authors: Chen Shang Xing , Wang Zong De , Fang Kai , Fan Guo Rong , Wang Peng
Published: October 2014

The pretreatment of bamboo with dilute alkali and the effects on chemical components and enzymatic hydrolysis were studied, and the fiber structural properties of pretreated residues were studied with Scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The results showed that dilute alkali was highly effective in delignification of the biomass, reducing the lignin content by 50-70%. Bamboo solid recovery was 74.40%, and cellulose, hemicellulose and lignin content were 60.02%, 25.93% and 9.08%, respectively, when pretreated with 1.0% sodium hydroxide, with a solid-liquid ratio of 1:10 at 100 °C for 40 min. Under the conditions, the pretreated residue was hydrolyzed for 72 h with cellulose and xylanase dosage 40 FPU/g cellulose, and the hydrolysis yield of cellulose was 81.38% and that of hemicelluloses was 84.78%, resulting in a total of 66.74 g fermentable sugars from 100 g dry bamboo. The SEM pictures indicated that the biomass structure was deformed and its fibers were exposed, and FTIR results verified the lignin removal by the pretreatment.
The Research on Gravure Printing RFID Antenna
Authors: Lu Jian Dong , Deng Pu Jun , Li Lu Hai , Li Wei Wei
Published: October 2014

As one method of producing RFID antenna, direct-printing has some advantages including simple process, low cost and less pollution. Gravure printing is suitable for printing RFID antenna, according to gravure printing principle. The whole process of gravure printing RFID antenna is researched in this paper, which includes the conductive ink, the plate-making and the determining of printing technical parameters. At last, the printed RFID antenna is packaged and measured, in order to verify the gravure printing RFID antenna can be used in practice. The measure result shows that the printed RFID antenna can totally meet the practical requirements of the RFID tag.
Synthesis and Fluorescence Properties of Water-Soluble L-Cysteine-Modified ZnSe:Ag Quantum Dots
Authors: Lin Li Ping , Huang Feng Hua , Chen Pei Feng
Published: October 2014

The water-soluble ZnSe:Ag quantum dots were synthesized in aqueous medium by chemical co-precipitation method with L-cysteine as surface modifier. The crystal structure and optical properties of the obtained ZnSe:Ag quantum dots have been characterized by X-ray power diffraction, infrared spectrum, UV-Vis absorption spectrum and photoluminescence spectrum. Results indicate that ZnSe:Ag quantum dots belong to the cubic blende structure and have good fluorescent characteristics. The L-cysteine modified on the surface of ZnSe:Ag quantum dots renders the quantum dots water-soluble, biocompatible.
Effect of Polypropylene Fiber on Performance of Phosphorus Slag Mortar
Authors: Yang Lin , Liu Ya Ming , Zuo Jian , Zhang Bin , Cao Jian Xin
Published: October 2014

Cement, phosphorus slag, silica sand, fly ash and water reducing agent were well-mixed, and then stirred with polypropylene fiber and water for preparation of phosphorus slag mortar. Performance of the mortar was tested according to relevant standards. The results showed that polypropylene fiber can improve flexural strength and tensile bond strength of the mortar. However the polypropylene fiber has little contribution to the compressive strength of the mortar. Fluidity of phosphorus slag mortar reduces with length of the fiber increasing. Polypropylene fibers distributed evenly in the phosphorus slag mortar can obstruct generation and propagation of micro cracks, thus crack-control property of mortar can be improved. When polypropylene fiber’s length and content are 10 mm and 4 g (by weight) respectively, the properties of phosphorus slag mortar are as follow: fluidity 209 mm, tensile bond strength 0.71 MPa, flexural strength 4.32 MPa, Compressive strength 10.83 MPa, and ratio of compressive strength to flexural strength 2.51 on 28 days.
Preparation and Thermal-Resistant Performance of Silicon Rubber
Authors: Lu Qin Fang , Li Xiao Bing , Zhang Hua Lu , Xie Bao Hua , Zhang Xiao Yu
Published: October 2014

Heat vulcanized silicon rubber was prepared by mixing technology. The influences of factors on silicon rubber performance were investigated such as raw rubber dosage, thermal-resistant additive dosage and process conditions. The results show that the optimal formula is as follows: 28.8phr raw rubber containing 0.23 vinyl group, 0.4phr white carbon black dispersant, 10phr vapor white carbon black, 0.5phr iron oxide, 0.7phr zinc oxide, 0.99phr thermal-resistant additive, 0.4phr accelerator DM and 0.6phr benzoyl peroxide. After placed for 24h, the mixture underwent two-step vulcanization (127°C×10.0MPa×6min and 200°C×4h). The thermal-resistant performance of silicon rubber was dramatically improved by thermal-resistant additive.
Study of the Effects of Treatment Conditions on the Hydrophility of Modified Polyphenylene Sulfide Nonwoven Induced by Low Temperature Plasma
Authors: Xu Zhi Bin , Li Ying Na , Chen Xue Lian
Published: October 2014

The polyphenylene sulfide (PPS) Nonwoven was modified by grafting polymerization of the acrylic acid (AA) with the initiation of the low temperature plasma. Effects of different treatment conditions on the graft reaction and the hydrophility of the modified PPSs were investigated. Scanning electron microscopy (SEM) images showed that the graft polymerization only occurred on the surface of PPS. The hydrophility of the PPS nonwoven were examined by alkali absorption rate. The results show that the optimum modified conditions are 90s treating time, 50W plasma power and 1.5cm distance between of the electrodes.
Effect of Current Density on Microstructure and Corrosion Resistance of Ni–W Alloy Coatings
Authors: Xiao Yi , Zhou Qiong Yu , Fang Jian Hui , Zhong Qing Dong
Published: October 2014

Ni-W alloy coating was electroplated on the surface of mild steel and the effect of current density on its corrosion behavior was evaluated in this paper. The microstructure of the coatings were scanning electron microscopy (SEM) Polarization techniques have been used to investigate the corrosion behavior in 3.5wt.% NaCl. The results showed that the surface morphology of the coatings is strongly influenced by the deposition current density. And the increased of current densities is benefit for the Ni-W coating from0.5 to 4A/dm2, and the critical value of current densities is 4A/dm2, the corrosion resistance of electroplated coating present better worse when current densities exceeds the critical value or more.
Preparation of Epoxy-Organobentonite Nanocomposites Added ZnO-ZrO2 /Al2O3-ZrO2 Nanoparticles and Investigation on their Corrosion Resistance Property in Coating on Q235 Steel
Authors: Bui Quoc Binh , Zhong Qing Dong , Zhou Qiong Yu , Shi Xi , Ji Dan
Published: October 2014

For purpose of synthesis new epoxy coatings to protect the structural steel in sea environment, in this paper, two epoxy-based nanocomposite samples containing low-loading of ZnO-ZrO2/ZrO2-Al2O3 nanoparticles and organobentonite nanoparticles were prepared. Pure epoxy sample and epoxy-based composite added organobentonite nanoparticles were also prepared for comparison. Dispersion of metal oxide particles and organobentonite nanoparticles into epoxy-composites were evaluated by using XRD analyses. Microhardness, adhesion and corrosion resistance over 91 days of immersion in artificial seawater (ASW) solution of new composites were studied by Vickers’ hardness test (HV test), cross-cut test, electrochemical impedance spectroscopy (EIS) and polarization curves, respectively. Results showed that combined use of low-loading fillers had a positive effect on the organobentonite exfoliation behavior in resulting epoxy-based nanocomposites. Hardness, adhesion of two novel composites increased in comparison to pure epoxy even though with epoxy-based composite added organobentonite only. Results also showed that nanoparticle fillers could significantly improve the corrosion resistance of the coated steel, with ZnO-ZrO2-organobentonite fillers being the best.
Study on Dissolution Different of Metal Palladium Powder and Place
Authors: Zhao Ji Shou , Zhang X.M. , Dai J.H.
Published: October 2014

The chemistry of the dissolution of Palladium in pressure-cyanide has not received considerable attention. At room temperature and pressures, the reaction between sodium cyanide and Palladium does not occur because of poor kinetics. However, at elevated temperatures between 100-160 °C, Palladium can be leached by sodium cyanide like the reaction of gold. A research study has been undertaken to develop the fundamentals of a method for the direct dissolution of Palladium In this work, the dissolution of Palladium powder and place were measured in pressure clear cyanide solution. The cyanide leaching reaction mechanism is also discussed. The data of Palladium powder and place at different cyanide concentrations, different temperature and different oxygen pressure are obtained. The dissolution rate of metal Palladium powder and place were found to be relate to the cyanide and oxygen level.
Weld Repairs of the Electroslag Casting Red Copper Crucible
Authors: Xia Xiang , Xie Shi Kun , Liao Li Ping
Published: October 2014

The paper analyses the manufacturability and difficulties in weld repairs of the electroslag casting red copper crucible with bent axle, work out the relevant measure. It is proved by experiment that large red copper product can be perfectly repairs by use suitable welding procedure.
The Flotation Process of Lepidolite in Jiangxi Province in China
Authors: Liu Yue Long , Liu Jia
Published: October 2014

Because of the extraction difficulties from brines in China, it is necessary to take advantage of the lepidolite resources, driven by the huge economic benefit and social benefit requirements. Several factories use refined lepidolite to produce lithium carbonate in Yichun city because of the rare metals and high price of battery-grade lithium carbonate. The primary separation of lepidolite from complex silicate minerals is froth flotation. In this paper, the froth flotation process for production of refined lepidolite from Ta & Nb waste minerals in Yichun city and in Yifeng town is discussed.
Method and Simulation for Kinematics of 6-SPS Parallel Mechanism
Authors: Zhou Yi Jun , Li Xue Ming , Xu Hai Yang , Fan Heng Liang
Published: October 2014

Solving forward displacement is the difficulty of the 6-SPS parallel kinematics calculations, to make sure solving forward displacement easily, in this paper, added a initial multi-DOF drive to the 6-SPS parallel mechanism's moving platform in the ADAMS environment to make kinematical simulation, to get simulation of inverse kinematics solution and strike a theoretical inverse kinematics solution in the MATLAB environment, and prove the correctness of simulation of inverse solution. The inverse simulation position be used as input parameters to drive this parallel mechanism, by the solving forward displacement, results showed that the forward displacement is consist with the initial-DOF-driven values, indicating it is correct. It proves the use of these methods can be simply and easily calculate the required 6-SPS parallel mechanism positive solution, which can provide the reference of such institutions' solving forward position and control.
Modeling and Simulation of Bow-Shaped Piezoelectric Energy Harvester
Authors: Jiang Bing , Yuan Shuai , Xin Jian Bo , Chen Li Juan , Hao Yu Guo , Zhang Hua Qing
Published: October 2014

In recent years, new energy supply (energy self-sufficiency) technology which can replace the traditional battery supply has become a hot topic in global research field of microelectronic devices. A new low-frequency trapezoidal bow-shaped piezoelectric energy harvester (TBPEH) was proposed. The geometric model and finite element model (FEM) were built. The static analysis, modal analysis and harmonic response analysis of the TBPEH were discussed by using the Finite Element Analysis(FEA). Then traditional rectangular bow-shaped piezoelectric energy harvester(RBPEH) was compared with the new TBPEH. Simulation showed that the TBPEH could harvest energy more effectively than the RBPEH. The output voltage was increased by 135% with little change in resonant frequency, and indicator of the inhibition of side peak (SPI) which represented the capability of broad-band energy harvesting rose 11.2%. The TBPEH resonance frequency is 34.1Hz, which can be applied to the low frequency environment.
Optimal Design of Horizontal Well Traction Robot Traction Force Regulating Mechanism
Authors: Li Long Qiu , Zhou De Kai , Zhang Guang Yu , Li Yi Qing , Song Wen Ping
Published: October 2014

Production section testing technique is an important kit technique of horizontal well development. And traction robot technology is the core technology. Downhole driving unit is a very important part of traction robot, it can be used to implement a variety of sports instruction of control system, so that the traction robot can walk in the pipeline, to sent the test equipment to the destination, and the crawling round can be recovered automatically when the system is powered down. This paper give out the overall design of downhole driving unit, and then the traction regulating mechanism has been optimized: first, created a mechanical model of traction control mechanism, and then optimize the important structure parameters of the adjustment mechanism.
Research on the Regeneration of Modified Activated Carbon Containing 2,4,6-TCP by Microwave Irradiation
Authors: Wang Min , Wang Xiang Lian , Gao Gui Qing
Published: October 2014

Microwave regeneration research has been conducted for the modified activated carbon (MAC) which has adsorbed 2,4,6-TCP. The effects of microwave power, microwave irradiation time and MAC loading amount for regeneration are studied.The results show that, at the beginning, the adsorption volume increases with the increase of the microwave power. However, when the power is over 450w, the adsorption volume begins to fall. The adsorption volume increases with the irradiation time,rises to its peak when irradiated for 6 minutes.The adsorption volume increases with the loading amount and rises to its peak when the amount is 5g.
Research on Waste Heat Recovery and Utilization of Hydrogen Production Industry Based on Heat Pipe Heat Exchanger Technology
Authors: Wu Guang , Song Jia Hui , Chen Jun Feng , Deng Chao Qun
Published: October 2014

For the low temperature waste heat recovery problem, waste heat recycling system was designed based on the heat pipe heat transfer technology of hydrogen in industry. The system is mainly in the process of hydrogen production by methanol steam reforming, using heat pipe excellent thermal conductivity, isothermal and thermal response characteristics, it will be in the low temperature waste heat of flue gas as heat source, in the heat pipe under the action of high efficiency heat transfer, through technology improvement, structure optimization design, achieved high efficiency, energy saved heat transfer to the methanol in the reaction system of hydrogen production, achieved the goal of remaining heat to be recycled.
Connectedness of Physics and Chemistry Courses in the Group of Terms
Authors: Gnitetskaya Tatyana N. , Purysheva Natalia S. , Ivanova Elena B.
Published: October 2014

The present article shows the results of comparing the connectedness between the high school courses of Physics and Chemistry. The calculation of connectedness has been conducted within a graph model of inter-subject links developed by Gnitetskaya Tatyana N. The inter-subject space of the Physics and Chemistry courses is based on this model. The quantitative characteristics of this model are used to establish the hierarchy of physical terms used in Chemistry, and chemical terms used in Physics for all combinations of the Physics and Chemistry courses under review. Quantitative values of the connectedness between the courses of Physics and Chemistry have been calculated; they are used as foundation for selecting the courses of Physics and Chemistry based on the position of connectedness.
Energy Consumption Analysis of Air Separation Process for Oxy-Fuel Combustion System
Authors: Xiong Yong Qiang , Luo Peng , Hua Ben
Published: October 2014

Oxy-fuel combustion is a leading potential technology to capture CO2. Because the oxygen production process is causing the largest power penalty in oxy-fuel combustion system, it is essential to cut down oxygen separation power penalty for capturing CO2 at low cost. This paper presents the energy consumption analysis results of air separation units with three different cycles offering for oxy-fuel combustion systems. The study shows that when the gaseous oxygen compression (GOXC) cycle is selected for pressuring oxygen product stream, the specific consumption of high pressure and low purity oxygen with triple column cycle is about 6.4-7.2% less than that of with dual column cycle. And when choosing triple column cycle for oxygen production, an air separation unit with pumped liquid oxygen (PLOX) cycle is a better option than with GOXC cycle because it helps to improve plant safety and to decrease energy consumption of high pressure oxygen products.
Research on Influencing Factor of Performance Ability of Emulsion Explosive
Authors: Luo Ya Jun , Tao Tie Jun , Chi En An , Zhao Ming Sheng
Published: October 2014

Emulsion explosive is one of common industrial explosives, its performance ability is important for producer. So the experiment and theory analysis were made to improve the performance ability of emulsion explosive in this paper. The results show that: performance ability of explosive becomes bigger when oxygen balance of explosive is zero or slightly negative; Water content also has a significant impact on stability, density and explosive performance of emulsion explosive; performance ability of emulsion explosive is generally rises with density increasing. The key approaches of improving the performance ability are that improving the explosion heat and hematocrit and selecting appropriate moisture content and density, and advanced process technology also should be put to use.
A New Method to Identify Pulsatilla chinesis(Bge) Regel, from Potentilla chinesis Ser. Based on ITS Sequences
Authors: Zhang Shao Xuan , Lin Guang Zhu , Wang Bo Chuan , Shi Yan
Published: October 2014

To establish a reliable identification method of Pulsatilla chinesis (Bge) Regel., from its counterfeits, Potentilla chinesis Ser., we extracted the genome DNA from the leaves of these two plants collected in Jilin Province, amplified the ITS region using ITS universal primers of angiosperm, and sequenced the purified PCR products directly. The obtained sequences were edited by Genetyx and compared. Based on ITS sequences, we used primer PREMIER 5.0 to search the restriction sites of the two ITS sequences and found BtgI can be used to identify them.
Analysis on Change of Nutritional Ingredients in Ensiling Process of Pineapple Leaf Residue
Authors: Du Ji Hua , Zhang Jin , Han Jian Cheng , Gong Pu , Lian Wen Wei , Li Ming Fu
Published: October 2014

This paper carries out detection on nutritional ingredients of pineapple leaf residue 3 days, 5 days, 7 days, 15 days, 25 days, and 35 days after ensiling respectively, and then carries out comparison and analysis with control group (0 day). It can be seen from experimental result that pH value of feedstuff rapidly decreases 15 days after ensiling and the feedstuff reaches the peak of fermentation, the moisture content obviously increases (P<0.05) 3 days after ensiling, and the dry matter(DM) content obviously shows a decreasing trend (P<0.05). The content of neutral detergent fiber(NDF) rapidly decreases 15 days after ensiling, which conforms to pH decreasing trend. In whole ensiling process, the crude protein(CP) and crude fat(CF) run away, and the content of crude ash(CA) and nitrogen-free extract(NFE) rises; the reason why the proportion occupied by these two items rises may be that the nutrient substance runs away and the content of dry matter decreases.
Effect of GDM on the Expression of MT1-MMP and u-PA in Glioma Cells
Authors: Han Xue Mei , Wang Li Bo , Li Ni Ni , Liu Song Yan
Published: October 2014

To examine the effect of GDM on the expression of MT1-MMP and u-PA genes in glioma cells. Glioma cell lines U251 and U87 were cultured in DMEM medium supplemented with 10% fetal bovine serum. RT-PCR was used to identify gene expression level. The level of u-PA mRNA was up-regulated significantly in the HGF group compared with the normal control group (P<0.05). The expression of MT1-MMP and u-PA was significantly lower in the GDM group than in the normal control and HGF groups (P<0.05). The expression of u-PA in the HGF+GDM group was down-regulated significantly compared with the normal control and HGF groups (P<0.05).GDM can inhibit expression of both MT1-MMP and u-PA in glioma cells.
The Antimicrobial Activity of Fructuskochiae Ethanol Extract and its Impact on the Rheological Properties of the Shampoo
Authors: Yu Ling , Liu Tian Jing , Dong Lei , Kong Ling Shan , Feng Tao
Published: October 2014

The aim of this study was to determine the antimicrobial activity of Fructuskochiae ethanol extract against Escherichia coli, Staphylococcus aureus and Candida albicans, and its impact on the rheological properties of shampoo when it was added into the shampoo. The results showed that different concentrations of Fructuskochiae ethanol extract were demonstrated a certain inhibitory effect, with the increasing of the concentration, the antibacterial activity was also on the rise. When the ethanol extract was added into shampoo, the rheological properties of the system changed significantly.
A New Method for Synthesis of Iron Phthalocyanine
Authors: Kong Xiang Wen , Wang Huan , Zhang Jing
Published: October 2014

Iron phthalocyanine was prepared by the reaction of phthalic anhydride, urea and ferrous chloride by means of the solvent method with dioctyl phthalate as solvent, ammonium molybdenate as a catalyst and ammonium chloride as promoter. The reaction was carried out in the conditions that 2 hours was required for the first stage at the temperature of ca. 403 K and 6 hours was required for the second stage at the temperature of ca. 453 K. The yield of the product reached of 77%. Along with the use of dioctyl phthalate as solvent for the reaction for producing iron phthalocyanine, the whole production process could become more friendly to the environment compared with the traditional methods with trichlorobenzene, nitrobenzene or other substances as the solvent.
Study on Synthesis of a Series of Amino Functional Cholesterylated Hepatic Targeting Liposome Ligands
Authors: Wu Xiao Chun , Hai Li , Wu Yong
Published: October 2014

A series of hepatic amino functional cholesterylated hepatic targeting liposome ligands L1-L6 were synthesized. Cholesterol as starting material, after esterification with p-toluenesulfonyl chloride to get cholesterol tosylate, then etherification with oligo ethylene ethanol (n=1-3) to get amino functional cholesterylated compounds T1-T3, T1-T3 were elongated by reaction with protected diethylene glycol and deprotected in acid condition to get T4-T6 . L1-L6 were mesylated and replaced by azido group, then hydrogenanted by hydrogen to get L1-L6.The target compounds affords cholesterylated hepatic targeting liposome ligands.
Synthesis and Swelling Behavior of Biodegradable Cellulose-Based Hydrogels
Authors: Xiao Min , Hu Jian Can , Zhang Li Ming
Published: October 2014

Novel biodegradable cellulose-based hydrogels were synthesized using a non-toxic crosslinker, polyethylene glycol diglycidyl ether (PEGDE). The effects of the crosslinker concentration and the ratio of sodium carboxymethyl cellulose (CMC) to cellulose were investigated. The results indicate that decreasing the amount of PEGDE and increasing the CMC to cellulose ratio resulted in better swelling. The 9:1 CMC/cellulose hydrogel with incorporating 3g of PEGDE had a swelling ratio of 230g/g. The synthesized hydrogels exhibited less swelling in NaCl solution due to a decrease in the osmotic pressure between the interior of the hydrogel network and the external immersion medium.
Application Research on Cleaner Production Auditing in Papermaking Enterprise
Authors: Gao Biao
Published: October 2014

In order to achieve sustainable development of the papermaking industry, the papermaking enterprises must devote major efforts to implement cleaner production and cleaner production auditing. Based on the objectives and basic ideas of cleaner production auditing, the article took one papermaking enterprise in Baicheng city of Jilin Province as an example and studied deeply how to implement cleaner production auditing in papermaking enterprise, in order to hold a mirror to papermaking enterprise in cleaner production auditing.
Removal of Uranium(VI) by Humic-Reducing Bacteria
Authors: Li Shi You , Wei Qing Peng , Xie Shui Bo , Zeng Tao Tao , Gu Zhong Hua
Published: October 2014

The effective factor such as temperature, pH, AQS and the content of U(VI) were investigated in the study on removal U(VI) by humic-reducing bacteria (HRB). The analysis of FTIR showed the carboxyl, amide and phosphate groups are the main functional group to remove U(VI), and the optimal temperature is about 30°C, the optimal pH is about 6.0 and the optimal content of AQS is about 1.0 mmol/L.
Steady Seepage Analysis of the Filled Channel Slope with Anisotropy
Authors: Yang Xu Liang , Ji Ri Chen , Bai Wen Wen , Chen Xi
Published: October 2014

Middle Route of South-to-North Water Transfer Project main canal is grand supplied channel, it has the high requirements for transfer water reliability, so seepage control is particularly important for the channel slope along canal. According to conditions of seepage field and transformed relations of permeability coefficient to respectively simulate the seepage of channel slope with the homogeneous isotropic seepage field and the homogeneous anisotropic seepage field, the mathematical model and finite element model were created for the seepage of the filled channel slope with stratified and rolled, using ANSYS thermal analysis module for steady seepage analysis. Compared analysis shows that the seepage of the stratified and rolled channel slope in homogeneous anisotropic of seepage field is more intense than in homogeneous isotropic of seepage field, the analysis of the stratified channel slope by the homogeneous anisotropic seepage field matches the actual and is also more reasonable.
Measurement of Therapeutic Proton Beam Using a Fiber-Optic Cerenkov Radiation Sensor
Authors: Kim Seon Guen , Jang Kyoung Won , Shin Sang Hun , Hong Seung Han , Sim Hyeok In , Jeon Hye Su , Jang Jae Seok , Kim Jae Seok , Kwon Gu Won , Yoo Wook Jae , Kim Me Young , Shin Dong Ho , Cho Seung Hyun , Lee Bong Soo
Published: October 2014

Tumor therapy using the high-energy radiation has evolved over the decades as typical non-invasive treatment method due to its advantage compared with surgery. But, the radiotherapy can damage or destroy normal cells as well as destroying tumor cells and cause side effects of treatment. Even though most side effects are temporary, these effects can be extremely fatal for patient. Therefore, the exact measurement of the exposure dose of patient during radiation therapy is very important for patient safety. In the case of the conventional fiber-optic radiation sensor that consists of a scintillator for high-energy radiation dosimetry, additional correction is necessary due to the quenching effects of the scintillator. In this study, we measured the exposure dose of the high-energy proton beam without the scintillator by using the Cerenkov radiation that generated inside the plastic optical fiber. As a result of this study, we confirmed a Bragg peak of the proton beam without a scintillator. Also it was in good agreement with the result of the ionization chamber.
Influence of Bivalent Ion on Oil/Water Interfacial Properties
Authors: Zhang Hai Yan
Published: October 2014

The interfacial tension (IFT) and contact angles of different oil/solutions were compared to unveil the influence of Mg2+on oil/NaOH interfacial properties. The results demonstrate that adding Mg2+to NaOH solution cannot change the oil/NaOH interfacial tension when enough OH-is provided. While for NaOH-surfactant solution, adding Mg2+changes the IFT dramatically. Adding NaOH to oil/water produces a minimal contact angle at NaOH of 0.02wt%. Adding surfactant or MgCl2alone increases the contact angles. Adding them together produces a synergism to bringing down contact angles gradually with the increase of NaOH concentration. The change of salinity and the reaction among them may be responsible for the influence and synergism.
The Calculating Benchmark Selection and its Skills in Chemical Engineering Calculation
Authors: Liu Yue Xian , Zhang Nan Zhe
Published: October 2014

Chemical engineering calculation is the base of chemical engineering science, the material balance and the energy balance are the most basic and important contents in chemical engineering calculation. The diversification and the importance of calculating benchmark in chemical engineering calculation were explained by an example about the material balance; the basic principles, some specific methods and skills for the calculating benchmark selection were pointed out. In short, the proper selection of calculating benchmark in chemical engineering calculation can not only simplify the calculation and improve the efficiency, but also avoid the errors.
Process Mineralogy Study of a Refractory Mixed Copper Ore
Authors: Liu Shuang , Cai Liu Lu , Song Yong Sheng , Wen Jian Kang , Zhou Gui Ying , Chen Yong
Published: October 2014

Process mineralogy research of a mixed copper ore is studied to identify the occurrence mode of copper and to analyze the mineralogical factors influencing the floatation results. The results show that the ore has features of "high-sulfur, high copper", "various copper mineral types", "fine copper mineral granularity" "disorderly copper mineral distribution", which belongs to the more difficult processing high sulfur mixed copper ore. Therefore, in order to effectively utilize the copper mine resource, floatation process or combination of floatation-hydrometallurgy process should be adopt.
Determination of Cyromazine and Melamine Based on Capillary Electrophoresis Coupled with Electrogenerated Chemiluminescence at Gold Nanoparticles Modified Electrode
Authors: Wang Chun Yan , Qi Ying Xin , Liu Xiao Qiu
Published: October 2014

A method has been developed for the detection of cyromazine and melamine using capillary electrophoresis (CE) coupled with electrogenerated chemiluminescence (ECL). The method utilized gold nanoparticles modified electrode as a working electrode because it can improve sensitivity of ECL detection. It has been found that acetonitrile can improve stacking in electrokinetic injection with field amplified sample stacking. The detection limits of 0.5 ng/mL and 1.0 ng/mL were obtained for cyromazine and melamine, respectively. The established method was successfully applied for milk sample analysis with good reproducibility, precision, accuracy, and high recovery.
Spectrophotometric Determination of Isoniazid in Pharmaceutical Sample by Silicomolybdenum Blue
Authors: Wen Xin Rong , Tu Chang Qing
Published: October 2014

A novel method for the spectrophotometric determination of isoniazid by silicomoly- bdenum blue has been established.The various effect factors on the spectrophotometric determination of isoniazid by silicomolybdenum blue were investigated in detail.The results showed that under certain reaction conditions,silicomolybdenum yellow could be reduced to silicomolybdenum blue by isoniazid, and the content of isoniazid was determinated indirectly through determinating the absorbance of the silicomolybdenum blue. The maximum absorption wavelength of chromogenic system is 740 nm, good linear relationship is obtained between the absorbance and the concentration of isoniazid in the range of 1.968～27.55 μg/mL,and the equation of the linear regression is A=0.0247+61.824ρ (μg/mL) with a linear correlation coefficient is 0.9995.This proposed method has been successfully applied to determinate of isoniazid in isoniazid tablets, and the results agree well with those obtained by pharmacopoeial method.
Study on Synthesis of 6-Bromo-2, 3-Dihydroxybenzaldehyde
Authors: Wang Li Ping , Liu Dong Wang , Wang Gao Peng , Qin Shuang Lin , Huang Shuang Ping , Wang Xiao Ji
Published: October 2014

The key intermediate, 6-bromo-2, 3-dihydroxybenzaldehyde, of salvianolic acid A (1) was reported, which was synthesized from commercially available 2-hydroxy-3-methoxybenzaldehyde.
Pressure-Induced Cationic Disordering in Pyrochlore Oxides (La1-xCex)2Zr2O7 and Enhancement of Compressibility
Authors: Zhang Fu Xiang , Lang Maik
Published: October 2014

Pyrochlore oxides La2Zr2O7,Ce2Zr2O7and their solid solutions were studied by in situ x-ray diffraction (XRD) measurement at high pressures. Pressure dependence of cationic disordering was derived from Rietveld refinement of the XRD patterns. The results indicated that the mixed occupancy in the cation site enhanced the compressibility obviously. All the pyrochlore structure became unstable at ~20 GPa and an orthorhombic high-pressure phase formed. The cations changed from the ordered state in pyrochlore to a disordered state in the high-pressure phase. The high-pressure phase is about 8% denser than the pyrochlore phase and not stable at ambient conditions and a disordered defect-fluorite structure was quenched for all the samples.
Determination of Platinum in Waste Platinum-Loaded Carbon Catalyst Samples Using Teflon Pressure Vessel-Assisted Sample Digestion and ICP-OES
Authors: Shi Chun Miao , Wei Xiao Juan
Published: October 2014

A novel method for the determination of platinum in waste platinum-loaded carbon catalyst samples was established by inductively coupled plasma optical emission spectrometry after samples digested by Teflon pressure digestion vessel with aqua regia. Such experiment conditions were investigated as the influence of sample dissolution methods, digestion time, digestion temperature and interfering ions on the determination. Under the optimized conditions, the limit of detection (LODs) of Pt for tested solution was 15 ng mL-1. The relative standard deviations (RSDs) for Pt was 2.35 % (CPt= 5 mg L-1, n = 7). The linear range of calibration graph for Pt was 0 ~ 150.00 mg L-1. The proposed method was applied to determine the practical samples with good recoveries and satisfactory results.
Determination of Gentamicin Residual in Duck Meat Using Fluorescence Analysis Method
Authors: Wang Xiao , Xu Jiang , Liu Mu Hua , Zhao Jin Hui , Hong Qian
Published: October 2014

Gentamicin is a kind of aminoglycoside antibiotics and widely used in the prevention and treatment of the duck diseases. A prediction model was established for the rapid detection of Gentamicin residue in duck meat using fluorescence analysis method according to the strong fluorescent characteristic of the generated derivative for Gentamicin and o-phthaldialdehyde (OPA) in the presence of emulsifier OP-10 and mercaptoethanol.The fluorescence spectra of the duck meat containing Gentamicin were analyzed, the optimum excitation wavelength of the material was 340 nm and the optimum emission wavelength was 442 nm. Fluorescence intensity and the concentration of the standard samples presented the good linear relationship, the linear correlation coefficient was 0.9963 and the limit of detection was 0.47 μg/mL in the dynamic rang of 0.5 ~6.5μg/mL. The correlation coefficient of regression equation was 0.9968 for the samples of duck meat extract. The experimental results showed that the fluorescence analysis method had a good performance and accuracy in detecting the Gentamicin residue in duck meat.
Oxidative Desulfurization of Dibenzothiophene Catalyzed by Polyoxometalate-Based Ionic Liquid
Authors: Wang Min , Wu Qin , Li Han Sheng , Zhao Yun , Jiao Qing Ze
Published: October 2014

A polyoxometalate-based ionic liquid, 1-(4-sulfonic acid) methylimidazolium phosphotungstate ([MIMBS]3PW12O40), was synthesized and characterized by Fourier transform infrared spectrum, nuclear magnetic resonance, electrospray ionization mass spectrum and thermogravimetric analyzer. [MIMBS]3PW12O40exhibited high activity for the extractive catalytic oxidative desulfurization process, together with H2O2and CH3CN/H2O. The sulfur removal of DBT could reach 99.9% under wild conditions, and the catalyst could be used three times with only a slight decline in activity.
Development and Validation of an UV-Visible Method for the Determination of β-Carotene in the Leafy Vegetables in Thailand
Authors: Rattanat Napaporn , Yodmora Kanjana
Published: October 2014

Determination of β-carotene content in four types of leafy vegetables, water morning glory, kale, lettuce and Chinese cabbage by using a simple, rapid and low cost of UV-Visible method. This study was in the concentration range of 0.5 to 12 mg/L, and showed the linear regression equation y = 0.0764x - 0.0008, and an excellent linearity with correlation coefficient (R2) was 0.9999. The accuracy of the method analysis was reported by percentage recovery of about 80-106%. The precision was reported by percent of relative standard deviation and varies for intra-day 3.92% and inter-day 3.99%. The limits of detection and limit of quantification were 0.004 and 0.013 mg/L, respectively. Acetone is the most suitable for extraction, ratio of weight of samples to solvent, and extraction time was 1:3 g/mL and 10 min. Moreover, the most appropriate storage temperature for leafy vegetable samples is 4°C. Evaluation of β-carotene content under the suitable conditions in the kale, Chinese cabbage, lettuce and water morning glory was found to be 27.96 ± 2.99, 19.35 ± 1.92, 18.78 ± 0.88 and 18.48 ± 1.86 mg/100 g, respectively.
Effect of Hot Air Convection Drying Temperatures on Physical and Chemical Properties of Germinated Sweet Corn
Authors: Bualuang Oraporn , Thamphueak Kamonrat
Published: October 2014

The effects of hot air drying temperatures (40-80°C) on apparent density, void fraction, shrinkage, total phenolics, total flavonoids and reducing power in germinated corn were investigated. The physical properties: apparent density, void fraction and shrinkage at moisture contents ranging from 13 to 35% dry-basis were determined using standard techniques. The result found that apparent density and the void fraction were linear in relation to the initial moisture contents. The apparent density increased from 44 to 50 kg/m3. The void fraction decreased from 78 to 58% with increasing moisture content. The chemical property resulted in 40°C hot air convection drying enhances total phenolics and total flavonoids to 6.41% and 50.00%, respectively, when compared with the control. Higher drying temperature resulted in lower total phenolic, total flavonoid content and reducing power of germinated sweet corn compared with the control.
Prepared Polyclonal Antibody of the Ciprofloxacin
Authors: Huang Xuang Yun , Huang Dong Mei , Cai You Qiong
Published: October 2014

To detect Ciprofloxacin (CPFX) residues in food stuffs of animal origin rapidly by immune method, preparation of high quality polyclonal antibody against CPFX was the most critical step of project. We produced two kinds of antigens for CPFX, using carrier protein bovine serum albumin (BSA) and ovalbumin (OVA) by a modified carbodiimide method, and then the hapten-protein conjugates were characterized by ultraviolet spectrophotometry in detecting qualitatively comparable hapten density, before being used for the immunization and detection purposes. The production of polyclonal antibodies (PcAbs) were sought following the generation of appropriate CPFX-BSA conjugate. One PcAb against Ciprofloxacin (CPFX) was produced and the titer polyclonal antibody could reach 6.25×105. In the optimized ELISA, the PcAb showed 50% inhibition at 10.93 ng/mL for CPFX in buffer.