bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Luminescence of Host-Guest (SBA-15)-(Arsenano-III) Nanocomposite Materials
Authors: Li Xiao Dong
Published: September 2013

The nanosized channels of SBA-15 molecular sieves were used as template and arsenano-III (ASA-III) was trapped inside the SBA-15 molecular sieves by means of liquid grafting method. The prepared nanocomposite materials were characterized by the powder X-ray diffraction, low temperature nitrogen adsorption-desorption and solid diffuse reflectance absorption spectra. The powder X-ray diffraction indicated the structure of the (SBA-15)-(ASA-III) still remains two-dimensional hexagonal mesostructrure. The low temperature nitrogen adsorption-desorption research showed that the ASA-III was present on the inner surface and partially occupied the channels of the molecular sieve. The UV-Vis solid state diffuse reflectance absorption spectra of the prepared composite materials showed the steroconfinmment effect of the host SBA-15 channels on the guest ASA-III and the guest was in the channels of the SBA-15 host. Luminous spectra showed that the prepared (SBA-15)-(ASA-III) nanocomposite materials have the investigating optical properties.
Assembling of Composite of Ag/TiO2/Eu-MCM with Enhanced Photocatalytic Activity
Authors: Yin Wei
Published: September 2013

Ag/TiO2/Eu-MCM composite was prepared by a nanofilm of silver coating on a nanofilm of anatase TiO2­assembled onto the internal and external pore surface of a hierarchical micro/meso/macroporous molecular sieve Eu-MCM. The composites Ag/TiO2/Eu-MCM exhibited significant photocatalytic characteristics with more than four times higher UV-Vis-induced catalytic degradation for phenol than that of pure TiO2. The result is attributed to the composites possess vast specific surface areas, big pore width in favor of mass transfer, strong absorbance of nanofilm silver to UV-Vis light, rapid photoelectron transfer from excited nanofilm of TiO2to silver nanofilm, and reduction of the recombination probability of hole and photoelectron. There exists an excellent linear correlation with a correlation coefficient 0.979 between photocatalysis and fluorescence of the composite. A photocatalytic intermediate benzoquinone was measured using HPLC techniques during the process of photocatalytic degradation phenol under a weak UV-Vis radiation condition that indicated organic phenol was first oxidized into benzoquinone and finally degraded into inorganic species of carbon dioxide and water.
Preparation and Characterization of Novel Bipolar Copolymers Based on Quinoline Aluminum and Carbazole
Authors: Shen Teng Fei , Sun Ying Juan
Published: September 2013

In this work, a series of novel bipolar copolymers containing 8-hydroxyquinoline aluminum (Alq3) and carbazole had been synthesized by copolymerization of a novel Alq3 complex monomer and N-vinylcarbazole (NVK), and characterized by Fourier transform infrared spectra (FTIR), gel permeation chromatography (GPC) and differential scanning calorimetry (DSC).
Research on Antimicrobial Activity of Functional Protein Films
Authors: Huang Zhi Ying , Lei Qiao , Bao Jian Qiang , Xun Qian Nan
Published: September 2013

Antimicrobial effect of functional protein films incorporating garlic oil (GO), potassium sorbate (PS) and nisin (N) at various concentrations were discussed. This activity was tested against food pathogenic bacteria namely Escherichia coli (E.coli) and Staphylococcus aureus (S.aureus).Mechanical and physical properties were characterized. In the range of antimicrobial agents concentration studied, tensile strength (TS) and elongation at break (E) of functional protein films were changed by incorporating GO,PS and N. And the WVP value of functional protein films decreased as antimicrobial agents added. GO incorporated into protein films had no effect on E.coli, but incorporation of GO at 300μl had antimicrobial activity against S.aureus. Protein films incorporated with PS showed antimicrobial activity against S.aureus, but there was no effect on E.coli. Incorporation of N at the lowest level of 25,000 IU had antimicrobial activity against both E.coli and S.aureus.
Spectroscopic Investigation of γ-LiAlO2 Ceramic Doped with Tetrahedrally Coordinated Cr3+ Ions
Authors: Ma Jian
Published: September 2013

The γ-LiAlO2: Cr3+ceramics were successfully fabricated using multi-mode cavity microwave furnace, and the samples absorption spectrum was measured at room temperature. There are five bands in the red and near-infrared region. Using the crystal-field theory and introducing the average covalent factor model, we calculated the energy-level splitting of Cr3+ions in γ-LiAlO2and successfully explained these bands. These calculation results are in good agreement with the optical experiment data.
Properties of Protective Clothing for Medical
Authors: Guo Yan , Ma Tao , Li Peng Ling , Liu Na , Gui Lin
Published: September 2013

In this paper, several nonwoven and woven clothing are be selected for tested their protective, strength and comfortable. Through analysis their properties, the result can be seen that the nonwoven fabrics have better protective properties than woven fabrics, especially PVA nonwoven through water resistance finish. So, varies nonwoven clothing is used in hospital and family protective daily.
Properties of Coal Tar Pitch Modified with Acid and Oxidation Treatment
Authors: Yoo Mi Jung , Park Chang Wook , Lim Yun Soo , Kim Myung Soo
Published: September 2013

To achieve lower price and high performance of pitch carbon fiber, coal tar pitch has to restructure through high-purity process, thermal and acid treatment process, and separation process. Thermal treatment and different oxidation treatments were used to increase the softening point and yield of the precursor pitch for carbon fiber. These treatments have the effect on the properties of carbon fiber because they cause considerable change in the chemical composition of pitches. Low molecular weight materials could be removed by the thermal treatment. The oxygen containing structure formed by the acid treatments would promote the poly-condensation and polymerization reactions. The oxidation treatment with sulfuric acid, nitric acid, and air blowing would lead to the remarkable change in the chemical composition of pitches, and resulted in considerable increase in the softening point and yield of the pitches.
Preliminary Study of Activated Carbon Modified by Silica Aerogel
Authors: Luo Ya Jun , Yan Qian , Zhou Yong Chao , He Deng Liang , Hu Xiao Li
Published: September 2013

Activated carbon was modified with silica aerogel by the Sol-Gel. The surface characteristics and structure of activated carbon modified by the silica aerogel were characterized with N2 adsorption method, Scanning Electron Microscope and Thermal Analysis. The experiment results show that the silica aerogel can be used to modify activated carbon for the preparation of composite. SiO2 aerogel can effectively cover holes in the activated carbon, specific surface area of activated carbon composite modified by SiO2 aerogel was between activated carbon and silica aerogel. When MSiO2: MC is 1:3, specific surface area of the composite was 758.638 m2/g; When MSiO2:MC is 1:2, specific surface area of the composite was 760.38 m2/g; When MSiO2:MC is 1:1, specific surface area of the composite was 862.755 m2/g.
Mechanism and Preparation Methods of Inorganic Fire-Retardant
Authors: Tang Ting Ting , Liu Xing Yong , Hao Shi Xiong
Published: September 2013

The flame-retardant mechanisms of aluminium hydroxide (ATH) and magnesium hydroxide (MH) that used as typical inorganic fire-retardant were illustrated. The preparation methods of the fire-retardants are reviewed. And the modification approaches and future development direction of the fire-retardants were also discussed. Although the ATH and MH are environmental friendly flame retardants, they still have drawbacks and further research is needed to improve their flame retardant properties.
The Evolution of Activation Field with Temperature in Ferroelectric Copolymer of Vinylidene Fluoride and Trifluoroethylene Films
Authors: Jiang Lin , Meng Xiang Jian , Zhao X. L. , Tian B. B. , Liu B. L. , Yuan Guo Liang , Wang J. L. , Sun J. L. , Chu Jun Hao
Published: September 2013

Vinylidene fluoride and trifluoroethylene [P(VDF-TrFE)] ferroelectric thin film was spin-coated on Au-coated polyimide substrate and its polarization reversal was investigated by analyzing the evolution of activation field (α) with temperature. Although α is nearly a constant between 300 and 330 K, it increases linearly when temperature rates between 200 and 230 K, and between 230 and 300 K. On the other hand, the intensity of X-ray diffraction for P(VDF-TrFE) films from 200 to 330 K indicates that glass-transition process plays a significant role in both the microstructure and the polarization reversal of P(VDF-TrFE) copolymer.
Study on Anti-Stress Relaxation Behavior of Non-Quenched Steel
Authors: Pi Jin Hong , Wang Zhang Zhong , Zhao Xiu Ming , Wu Hai Feng
Published: September 2013

The cold draw MFT8 steels with different reduction in cross sectional areas were investigated to understand the effect of aging time on the anti-stress relaxation ability of non-quenched and tempered steel. The hardness and the anti-stress relaxation ability of cold draw NQT MFT8 steel was improved after aging at 300°Csince the precipitation of submicron particles within deformed ferrite. The cold draw NQT MFT8 becomes harder and more resistant to stress relaxation with increasing aging time. The cold draw MFT8 with both 25% and 30% reduction in cross sectional areas are stress relaxation resistant after aged at 300°C for 2 hours.
Two-Membrane-Pieces Sensitizing Technology and Cyanines Sensitized Nano-TiO2 Materials
Authors: Wang Li Qiu , Zheng Li Hui , Liu Yang , Sun Shu Ping , Wang Peng Jun , Wang Xin Ting , Hao Yang Yang , He Tian Cheng
Published: September 2013

Two-membrane-pieces sensitizing method and the corresponding equipments were developed to prepare cyanines sensitized nanoTiO2 photo anode materials. The cyanines were synthesized from N-p-carboxybenzyl-2,3,3-trimethyl-3H-indoleninium-5-sulfonate potassium and squaric acid or 2-chloro-1-formyl-3-(hydroxymethylene) cyclohex-1-ene. The maximum UV-Vis absorption wavelengths of them were 631 nm and 782 nm, respectively. The nanoTiO2 thin films were prepared on ITO conductive glass from tetrabutyl titanate by sol-gel technique, and were sensitized with the dyes by two-membrane-pieces dye sensitizing method or immersion sensitizing method. Compared with traditional immersion sensitizing method, two-membrane-pieces sensitizing method was an environmentally friendly and economical process due to less dye consumption and less waste formed.
Oxidation and Adhesion of Decorative Nickel-Chromium Plating on Ferritic Stainless Steel
Authors: Wongpinij Thipusa , Wongpanya Pornwasa
Published: September 2013

Decorative Ni-Cr plating on ferritic stainless steel was exposed to pure carbon dioxide (CO2) at 200 and 300oC for 180 hours under continuous and cyclic oxidation tests. After oxidation test, weight changes of samples exposed to CO2were found to be less than that of samples exposed to air. However, weight changes were dependent on temperature and oxidation conditions. Heat-quench test was operated at temperature of 200-500oC for determining adhesion behavior of decorative Ni-Cr plating. From the heat-quench test, it revealed that adhesion ability between Ni-Cr plating layer and substrate increased with thickness of Ni pre-plating layer at temperature of 200 and 300°C. But, at temperature above 300°C, the adhesion ability increased with surface roughness of substrate before coating. In order to achieve important properties of decorative Ni-Cr plating, i.e., oxidation resistance, beautiful appearance and good adhesion, surface of substrate was necessarily prepared under medium roughness and then it was pre-plated with the thickest Ni layer before Cr coating was applied.
Electrodeposition of MgO/Calcium Phosphate Composite Coatings on Titanium for Biomedical Applications
Authors: Huang Yong , Han Shu Guang , Yan Ya Jing , Pang Xiao Feng
Published: September 2013

This work elucidated corrosion resistance of the electrodeposited MgO/calcium phosphate (Ca-P/MgO) films on titanium (Ti). The microstructure, phase composition, and corrosion resistance of the films were studied. Results revealed that The Ca-P/MgO composite coatings were rough and inhomogeneous, the upper layer was floral-like crystals or flakes agglomerates morphology, and the lower layer was needle-like crystals which were mutually cross linked. The coating was very dense, and the content of Mg was about 0.3 wt%. Potentiodynamic polarization test manifested that the Ca-P/MgO-coated surface exhibited superior corrosion resistance than the bare titanium.
Research on Surface Roughness of Die Steel in Micro-Etching
Authors: Huang Hong Guang , Wang Guan , Guo Zhong Ning , Song Qing , Deng Yu
Published: September 2013

In this study, the 300 µm width micro-channel was manufactured by spray etching method. The surface roughness was analyzed by Laser scanning con-focal microscope. The relationship of the surface roughness and etching factor such as spray etching pressure, mask gap and time had been studied. The results show that the surface roughness increases initially, and then reduces with the size of mask gap. While the roughness increases as the spraying pressure increases. The etching time plays slightly effect on roughness for it has no impact on the etch uniformity as mask gap and spray pressure do.
Preparation of Thick Ceramic Coating by Laser Multi-Layer Cladding II - Microstructural Characteristics
Authors: Wang Dong Sheng , Tian Zong Jun , Shen Li Da , Huang Yin Hui
Published: September 2013

In this study, thick ceramic coatings were fabricated by laser multi-layer cladding with Al2O3-13%TiO2nanostructured agglomerated powders based on series of crack control of clad layer. The microstructural characteristics and microhardness of the coating were investigated by using scanning electron microscopy (SEM) and microhardness measurement. The results show that the laser-clad thick ceramic coating has no obvious interface between the layers with dense, continuous structure, and almost no pores and free of large penetrating cracks. The ceramic layer is composed of fully melted regions (fine equiaxed grains) and partially melted regions (remained nanoparticles). In addition, the most microcracks in the coating are focus on the partially melted region. The grain size of ceramic coating in the depth direction is gradually increased, while the hardness along depth direction is gradually decreased.
Preparation of Thick Ceramic Coating by Laser Multi-Layer Cladding I - Crack Control
Authors: Wang Dong Sheng , Tian Zong Jun , Shen Li Da , Huang Yin Hui
Published: September 2013

The formation of cracks is one of the key problems which restricts the development and application of laser-clad ceramic coating technique on metal surface, especially during laser multi-layer cladding process because of stress superposition effect. In this study, a thick ceramic coating was fabricated by laser multi-layer cladding based on series of crack control methods. The crack of clad layer was controlled by preheating and slow cooling rate of sample with incubator, applying the ultrasonic vibration and adopting closed-loop controlling temperature of molten pool during laser cladding process. In addition, the crack of layer was controlled by the strengthening and toughening effect of remained nanoparticles in the laser-clad coating. Moreover, the use of a transition layer is also help to reduce layer cracks. The results show that the laser-clad ceramic coating is free of macroscopic cracks and the mcirocrack density is significantly reduced.
Polymerizer Coating Control Based on Sequence Table
Authors: Zhou Zhe Min
Published: September 2013

Sequential control is to use binary information digital technology of automatic control mode. Realization sequential control most has three kinds representative method: sequence table method, expression method and ladder diagram method. In this paper, we analyzed polymerizer coating technological process and Sequence Control Flow, then make use of CENTUM CS-3000s sequence table to realize the polymerizer coating completely automatic sequential control. The practice proved that it improved polymerizer coating effect, raised the equipment utilization rate and the PVC quality. it had the widespread application promotion value.
Effect of Rock Asphalt on the Surface Free Energy of Asphalt
Authors: Li Jing , Zhang Xiao Ning , Liu Yu , Wu Chuan Hai
Published: September 2013

The surface free energy of the asphalt was determined using the Owen-Wendt method by determining the contact angles between asphalt and different probe liquids. The effect of rock asphalt on the surface free energy of asphalt was measured. The results indicate that the rock asphalt increase the surface free energy of asphalt, which enhances the moisture damage resistance of asphalt.
Preparation of Biomimetic Superhydrophobic Silica/Polyurethane Composite Coating
Authors: Yu Hua Bing , Li Rui Feng
Published: September 2013

The SiO2/PU composite coatings were prepared by the bionic methods. First, nanosilica (SiO2) was prepared by sol-gel method using tetraethyl orthosilicate (TEOS) as the precursor. Then, by a simple spray process. The formation mechanism and the structure characteristics of the coating were analyzed. The coating surface was characterized using scanning electron microscopy (SEM). The effect of the content of the SiO2 and the dosage of PU and PEAC on the coating structure and contact angle was also studied. The results show that the coating surface has the similar micro-nanostructure with a lotus leaf, and the SiO2 content is 9%, the total content of PU and PEAC is 15%, that the contact angle of coating can reach 161°and rolling angle can reach 3°, and that the SiO2/PU composite coating possesses good super-hydrophobic properties.
Orientation Distribution of Fiber Suspensions in Extensional Flow
Authors: Huang Zan , Qu Jin Ping , Geng Ji Wei , Zhai Shu Feng , Jia Shi Kui
Published: September 2013

An orientation distribution function is adopted to describe three-dimensional orientation distribution of short fibers suspensions in extensional flow. A mathematical model of evolution process on fiber orientation distribution function is established by analytical method. Numerical simulation is also used to describe two and three dimensional orientation distribution of fibers. Therefore, analytical solution of differential equation on forecast fiber orientation distribution is deduced.
An APIT Algorithm Based on DV-HOP Multi-Hop
Authors: Lin Zhi Gui , Li Lin , Zhang Hui Qi , Li Min , Yao Fang Qin
Published: September 2013

Aiming at misjudgment formed by PIT (Point-In-triangulation Test) and position failure formed by edge effect in APIT algorithm, this paper introduces a multi-hop mechanism of DV-HOP algorithm and presents an APIT algorithm of based on DV-HOP multi-hop mechanism (AHMH-APIT). The AHMH-APIT algorithm uses DV-HOP multi-hop to compensate edge effect and anchor circle intersection region to replace triangulation, and uses weighted method to calculate the regional centroid. The paper simulated the AHMH-APIT algorithm by Matlab .The simulation result shows that, in the case of nodes being randomly distributed, compared with the APIT, all nodes can be positioned. Even if the number of anchor nodes and the communication radius is relatively small, unknown nodes can be positioned. And then the AHMH-APIT algorithm reduces average localization error and energy cost of communication.
Optimal Locating of Misbehavior Node in Wireless Sensor Network
Authors: Peng Si Wei , Liu Hui
Published: September 2013

In the application scene of the wireless sensor network, the distribution of nodes in the ideal case should be symmetrical. Each beacon node can help unknown nodes to locate. However, in the actual application environment, uneven distribution of nodes and irregular radius of node communication exist which lead to some unknown nodes that can not be achieved positioning. Based on the above problems, such nodes will be positioning analyzed and solutions are proposed to improve the precision and coverage of the network node positioning.
A Model of Three Points for Location Estimation in Wireless Sensor Networks
Authors: Xie Shao Guo , Hu Yan Jun , Wang Yi , Jiang Fang , Liu Jing Jing , Wang Ying Guan
Published: September 2013

In this paper, we propose a novel model of three points named TP for location estimation in wireless sensor networks (WSNs) with random deployment of anchor nodes. In this model, we select three anchor nodes which have the strongest received signal strength (RSS) for location estimation, the centroid algorithm and the method of intersection of judgment are used to estimate the location of unknown nodes. To further exploit three nearest intersection points in TP, the enhanced TP (ETP) is proposed. The simulation results show that the proposed models outperform MMSE and BML in terms of the localization accuracy for WSNs. Moreover, the localization accuracy of the proposed models in scenario 2 with random deployment of anchor nodes are better than in scenario 1 with planned deployment of anchor nodes. Additionally, compared with MMSE and BML, ETP and TP can reduce the environmental impact on location estimation.
Determinants for Product and Process Innovation: A Review in the Perspective of TQM Practices
Authors: Long Choi Sang , Abdul Aziz Mohd Hamizan
Published: September 2013

The purpose of this paper is to investigate and identify the total quality management (TQM) practices that give the positive impact to the innovation capability of the organization. The connection between the quality management and as well as the innovation capabilities has been explored. Base on the literature review, majority of previous studies support the notion that TQM practices have significant relationship with innovation capability of the organization. The TQM practices that are identified to have impact to innovation capability are leadership, strategic planning, customer focus, process management and people management.
Rapid Thermal Annealing on GaSb Thin Films Grown by Molecular Beam Epitaxy on GaAs Substrates
Authors: Hao Rui Ting , Guo Jie , Deng Shu Kang , Liu Ying , Miao Yan Mei , Xu Ying Qiang
Published: September 2013

Unintentionally doped GaSb films grown by Molecular Beam Epitaxy (MBE) on GaAs (001) substrates were annealed under different temperatures and time. It was found that the rapid thermal annealing (RTA) process can improve the optical properties. By changing annealing temperature and time, the optimized annealing temperature and times are found to be 650°C and 30s, respectively. Point defects and dislocations are two major kinds of defect in undoped GaSb thin films grown by MBE on GaAs (001) substrates.
Studies of Preparation and Stability of Liposomes Formed by 1,1'-[(3,5-didodeciloxycarbonyl-4-phenyl-1,4-dihydropyridine-2,6-diil)-dimethylen]Bispyridinium Dibromide
Authors: Rucins Martins , Petricenko Oksana , Pajuste Karlis , Plotniece Mara , Pajuste Klavs , Gosteva Marina , Cekavicus Brigita , Sobolev Arkadij , Plotniece Aiva
Published: September 2013

In this work we describe the studies of preparation and stability of liposomes formed by 1,1'-[(3,5-didodeciloxycarbonyl-4-phenyl-1,4-dihydropyridine-2,6-diil) dimethylebispyridinium dibromide, novel lipid-like compound. The influence of the amount of amphiphilic compound, solvent and sonication time was studied. Liposomes were prepared by dispersing of compound in the corresponding media at a selected concentration by sonication using a probe type sonicator and characterised by atomic force microscopy (AFM) and dynamic light scattering (DLS) methods.
The Effects of Depositing Sn-Ag-Cu-S Systems at Different Temperatures on Silver Substrates
Authors: Srisukho Pathra , Wongpreedee Kageeporn
Published: September 2013

Niello bars contain Lead which prohibits by laws and danger to environment. This research was to study the effects of temperatures which a black amalgam of lead-free niello bar alloys was filled in carved grooves of 95wt%Ag-5wt%Cu and 99.99wt%Ag substrates at 400C, 500C, 600C and 700C. Three compositions of lead-free niello bar alloys were selected in this research. The characterizations of microstructure, interface layers, and porosities of lead-free niello bar alloys after applying were reported. The results showed that all three compositions contain six compounds of CuAgS, Ag, Cu2S, Sn2S3, SnS and Cu4SnS4. After applying lead-free niello bar alloys on the substrates, it showed that composition #2 on the 95wt%Ag-5wt%Cu substrates was matched to the best condition of temperature at 600C giving lowest porosities.
Synthesis and Characteristics of Thermo-and pH-Sensitive PNIPAAm/PVP Hydrogels
Authors: Li Zhi Jun
Published: September 2013

Poly (N-isopropylacrylamide)(PNIPAAm)/Poly (N-vinylpyrrolidone)(PVP) hydrogels were prepared by irradiating the aqueous solution mixture of NIPAAm and PVP with electron beam. The effects of feed ratio, pH, and temperature on the swelling ratio of the hydrogels were investigated. It appeared that the hydrogels possessed both pH and temperature sensitivity, the lower critical solution temperature (LCST) of PNIPAAm/PVP hydrogels increased with the increasing of PVP content in the copolymers. The experimental results also showed that the hydrogels were ionic strength sensitivity, the swelling ratio decreased sharply when the ionic strength of the solution arrived to a certain critical value.
Synthesis and Crystal Structure of 9,9-Dipropionitrilefluorene
Authors: Hu Yuan Fang
Published: September 2013

A compound of 9,9-dipropionitrilefluorene (C19H16N2,Mr=272.34) was synthesized via nucleophilic addition reaction under microwave irradiation (500 w) within short reaction time (8 min), giving high yield of product (87%). Its structure was determined IR,1H NMR, MS, elemental analysis and X-ray diffraction. The crystal belongs to monoclinic, space group P2(1)/c witha= 21.8358(16),b= 8.9457(7),c= 15.9895(12) Å, β = 105.078(2)o, V= 3015.8(4) Å3,Z=8,Dc= 1.200 g/cm3,μ=0.071 mm-1,F(000)=1152,R=0.0629 andwR= 0.0881 for 3155 observed reflection with I>2σ (I). X-ray analysis reveals that the three fused rings of the fluorene system are almost coplanar and the two propionitrile groups are completely perpendicular to the fused-ring system, the molecular is symmetrical.
Effectiveness of some Nonionic Surfactants As Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid Solution
Authors: El-Shamy Omnia A.A.
Published: September 2013

The corrosion inhibition characteristics of the synthesized (I, II and III) nonionic surfactants on carbon steel corrosion in 1 M acid chloride have been investigated at 30 oC by potensiodynamic polarization. The obtained results show that compound I has the best efficiency at concentration 0.08 mmol/L while compound III is the best inhibitor at higher concentrations. The surface parameters of each synthesized surfactant were calculated from its surface tension including the critical micelle concentration (CMC), effectiveness of surfactant (π), maximum surface excess (Γmax) and the minimum surface area (Amin).
Molecular Docking Studies Involving Transitional Metal Complexes (Zn(II), Co(II), Cu(II), Fe(II), Ni(II) with Cholic Acid (AC) as Ligand against Aurora A Kinase
Authors: Beteringhe Adrian , Racuciu Ciprian , Balan Constantin , Stoican Elena , Patron Luminita
Published: September 2013

Colorectal cancer is a malignant tumor, one of the main types of cancer which produces a large number of deaths each year in many countries around the world. The main objective of this work is to employ various bioinformatics tools to perform docking of the transitional metal complexes (Zn (II), Co (II), Cu (II), Fe (II), Ni (II)) with cholic acid (AC) as ligand against Aurora A Kinase (RCSB Protein Data Bank code: 2X6E). Molegro Virtual Docker (MVD) was used for the docking process. The molecular docking score and the values of the statistic parameter Root Mean Square Deviation (RMSD) are presented in Table 1. The results obtained in this study serve to design new complex combinations with potential action against Aurora A Kinase inhibitor.
Effect of Milling Time on Mechanical Properties of Fly Ash Incorporated Cement Mortars
Authors: Zaldívar-Cadena A.A. , Díaz-Peña I. , González-López J.R. , Vázquez-Acosta F. , Cruz-López A. , Vázquez-Cuchillo O. , Vázquez-Rodríguez F. , Serrato-Arias L.M.
Published: September 2013

Currently, thermal energy generation through coal combustion produces ash particles which cause serious environmental problems and which are known as Fly Ash (FA). FA main components are oxides of silicon, aluminum, iron, calcium and magnesium in addition, toxic metals such as arsenic and cobalt. The use of fly ash as a cement replacement material increases long term strength and durability of concrete. In this work, samples were prepared by replacing cement by ground fly ash in 10, 20 and 30% by weight. The characterization of raw materials and microstructure was obtained by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD). The final results showed that the grinding process significantly improves the mechanical properties of all samples when compared replacing a mortar made with cement by ground fly ash and the reference samples without added fly ash. The beneficial effect of the ground fly ash can increase the use of this product in precast concrete industry.
Direct Synthesis of Titanium Phosphates Functionalized Ordered Mesoporous Materials (SBA-15)
Authors: Liang Min , Du Yun Chen , Kang Lei Lei , Liu Wen Wen , Han Xi Jiang
Published: September 2013

A series of functionalized SBA-15 with various contents of titanium phosphates [TiPO-SBA-15(x)] have been successfully synthesized by a facile and effective method. The obtained products possess well ordered mesostructure, high surface area and large pore size. TEM and images show that mostly titanium phosphates species have deposited on the external surface of SBA-15. UV-Visible spectra,31P MAS NMR and XPS indicate that the coordinated environment of Ti and P species in TiPO-SBA-15(x) is very similar to that of conventional amorphous titanium phosphates (TiPO). Very importantly, catalytic data in dehydration of cyclohexanol show that is more active than conventional titanium phosphates (TiPO), and their catalytic activities can be easily recovered. All these results indicate that TiPO-SBA-15(x) is a novel, active and recycled catalyst for dehydration of alcohols, which may be potentially useful heterogeneous catalysts in practical applications.
Equibiaxial Extensional Viscosity and Network Formation of Wheat Gluten - Xanthan Gum Dough
Authors: Zhao Xue Wei , Jiang Chun Peng , Li Rui Fen , An Guang Jie
Published: September 2013

The equibiaxial extensional viscosity of the doughs prepared from gluten and xanthan gum at three levels was determined in this work. The gluten-xanthan gum mixture exhibited strain rate thinning behavior at constant strain, and can be described by power-law model. The consistency index increased with increasing strain and xanthan gum content, while flow behavior index decreased with increasing strain and increased with increasing xanthan gum content. Cross-links in gluten network increased after xanthan gum addition and the increase magnitude was more markable at higher deformation rate.
The Preparation of High Quality CIS Films by Spraying Citrate-Capped Cu11In9 Alloy Nanoparticles Ink and RTP Process
Authors: Zhou Li , Ding Yuan Kui , Luo Pai Feng
Published: September 2013

A facile low-cost non-vacuum process for fabrication of high quality CuInSe2(CIS) films is described, which indicates a promising way for the application in thin film solar cells. First, citrate-capped Cu11In9alloy nanoparticles are synthesized by hot-injection method after a system research on the different reaction time and Cu-In ratio of the raw materials. From the TEM and XRD results, we can see that uniform spherical nanoparticles with dominant Cu11In9phase and less particle-to-particle agglomeration are successfully achieved in this study. Then, employing spray and RTP selenization process, high quality CIS films with dense and big grains are obtained, which show the single chalcopyrite structure and the preferred (112) orientation. An energy band gap about 1.01 eV is measured through the absorption spectroscopy measurement in our work.
Casting Mold Designing for Double-Chamber Throttle Valve
Authors: Wang Ao Bing , Wang Xue Dong , Chen Zheng Dong , Ni Li Yong , Gu Xiao Qin
Published: September 2013

The structure and processing of double chamber throttle valve body castings were analyzed. Die-casting molding process scheme was established. The design of mold includes three core-drawing mechanisms. Considering the large parts surface area and the relatively small wall thickness and the requirement of parting, the gate was arranged on the casting bottom surface. For economy and die easy maintenance considerations, die-casting machine, mold, and mold standard parts should be standard parts. The designs of mold gating system and non-standard pieces were completed. Proved by actual production, the mold operated smoothly, without clamping stagnation, and the production of die castings meet delivery requirements.
3D Dynamic Simulation and Optimization of Mammoth Desiliconization Converter for High-Quality Stainless Steel
Authors: Zhang Da Zhi , Jiang Zheng Yi
Published: September 2013

A three-dimensional dynamic simulation model of the molten iron flow field was presented in the paper with Fluent simulation software. Different operating parameters combinations, including different oxygen lance locations, oxygen pressures and oxygen flows, different arrangements of bottom blowing holes, hole sizes, nitrogen pressures and nitrogen flows were studied. It is shown that the relative optimum value of the distance from top-blow gun to the molten iron surface is 1500 mm, and bottom blowing hole diameter is 20mm, there is no significant difference of the blowing effects found when comparing single ring arrangement with double rings arrangement of 8 bottom blowing holes with only bottom-blow, and the bottom-blow of inner ring is disturbed by top-blow when top and bottom combined blow. Optimized design results have been applied to the design and manufacture of the actual converter, the converter has been successfully used in plant. The actual production results indicate that the desiliconization precision can reach 0.05%, the content of Cr2O3 in the slag after reduction can be less than 2%, better than the technical requirements of 3%, and improve the recovery rate of the chromium. Compared with traditional desiliconization method by iron gutter and iron ladle, desiliconization by converter does not use compression residue agents and reduce the amount of desiliconization agents and slag, and improve the desiliconization efficiency and productivity.
Study on the Preparation and Particle Size Control of Silica Sphere in a Sol-Gel Process
Authors: Qiu Ying , Hu Shu Chun , Zhai Jing , Lin Zhi Jian , Liu Wen Feng , Chen Xiao Lang , Cui Jing
Published: September 2013

Silica sphere has wide applications not only in the field of physical chemistry dealing with dynamic behavior and stability of particulate systems, but also in industries including catalysts, ceramics, pigments, pharmacy, etc. However, the control on the particle size is a key factor in the preparation process of silica sphere. In this paper, silica sphere with uniform sphere morphology and amorphous structure was prepared by a sol-gel method, and the control of particle size was emphatically studied. The results showed that the particle size of the as-prepared silica sphere was obviously influenced by the raw materials concentration. The average size of the product increased from 0.66 μm to 0.90 μm when ethanol concentration increased from 7.14M to 9.55M, increased from 0.50 μm to 0.90 μm with the increase of ammonia concentration in the range of 1.88M to 2.36M, and increased from 0.47 to 0.90 μm while tetraethoxysilane concentration increased from 0.08M to 0.11M. Further study indicated that the silica particle size was also influenced by reaction temperature, it increased with the increase of temperature from 26°C to 28°C, and decreased with the further increase of temperature in the scope of 28°C to 32°C.
Preparation and Characterization of Nickel-Based Anode-Supported SDC Half Cell by Tape Casting, Laminating and Co-Sintering
Authors: Li Xi Bao , Nie Zhen Yi , Xiong Ze Jun , Ma Zi Liang , Zhang Jian Qiang
Published: September 2013

NiO/YSZ (6:4 wt.%) and NiO/SDC (6:4 wt.%) anodes, NiO/YSZ (SDC) anode-supported SDC electrolyte half cell were fabricated by tape casting, laminating and co-sintering technique. The laminating temperature was chosen to be 85¡æ that was above the glass transition temperature of PVA binder. Laminating pressure of 30-70 MPa was tried and it was found that 50 MPa was the best. Some unreacted CeO2was decomposed between 1365-1393¡æ and Sm2NiO4compound was formed in NiO-based complexes at about 1445-1448¡æ. The sintering temperature of 1400 ¡æ was selected. The flexural strength of NiO/SDC anode (with an open porosity of 22.7%) and NiO/YSZ anode (with an open porosity of 21.2%) was 68.8 and 165.6 MPa, respectively. The flexural strength of as-fabricated NiO/YSZ anode achieved the requirement of the mechanical property for anode-supported SOFCs. SDC electrolyte with dense, crackfree and uniform structure was successfully adhered to the porous and homogeneous NiO/YSZ anode.
The Design and Implement of Acquisition and Recording System for Pulse Radar
Authors: Liu Ming Bo , Wang Zhong , Chong Jing
Published: September 2013

Aimed at the signal character of modern pulse radar and the idiographic requirement of the Acquisition and Recording system of Pulse Radar, at the base of detailed analyzing about the particular characters of pulses acquiring and recording, this article brings forward a method which is suitable to Pulse-Record system, and at the base of this, finishes the design, compliment and test of the system. The system can accommodate the timing relationship of pulse-radar which works in statuses of distance-detecting with m-code and avoiding blind-area, adapts the ways of abrupt acquiring and continuous transfers or storage, finishes the high-speed acquiring, transfers and storage of objective echo-signal with more than 200MHz abrupt sampling rate.
Study on Geometry Filtering Phenomenon and Flexible Car Body Resonant Vibration of Articulated Trains
Authors: Gong Dao , Gu Yue Jia , Zhou Jin Song
Published: September 2013

A vertical rigid-flexible coupling dynamic model of three articulated vehicles with car body flexibility is established, Green functions are utilized to solve the partial differential equation of each car body, and the mechanism of car body flexible resonance is analyzed. Results show that geometry filtering phenomenon exists in articulated train, when the car body first vertical bending frequency coincides with the frequencies which have the peak values of car body bounce acceleration transmissibility, resonant vibration of flexible car body will happen; The energy of track irregularity decreases rapidly with the increasing frequency, so it is important to avoid the car body resonance at low frequency; If the first vertical bending frequency of car body is greater than a certain value, the flexible resonance will have little effect on the ride quality.
Study on Application of CAE in a Centrifugal Compressor Impeller
Authors: Gong Bao Long , Jia Xiu Jie , Wang Guang Cun , Liu Zi Wu
Published: September 2013

CAE technology is the most common method to study properties of impeller in a centrifugal compressor. The fluid field was numerically simulated by CFX program to obtain the distribution rules of pressure, turbulence intensity and erosion wear. Based on fluid-solid interaction, stress and deformation were analyzed by Ansys program. According to the simulation results, the maximum deformation and equivalent stress of the impeller are all located on the junction between the blade trailing edge and the shroud. The most serious damaged part by erosion wear in impeller is on the pressure surface of long blade. The erosion wear area on blade pressure surface caused by particles impact primarily locates on blade trailing edge root and middle part. In the flow field, the turbulent intensity on suction surface is greater than that on pressure surface in the corresponding position and the greatest turbulent intensity is located on the leading edge of suction surface. There is backflow phenomenon around the suction surface of long blade and the short blade has significant effect to reduce backflow. The results of numerical simulation explain some actual impeller failure cases and can be applied to anti-wear impeller design and repair.
Research on Non-Linear Power Coal Blending Model and its Algorithm
Authors: Ma Ai Chun , Yang Jie , Chen Dong Nan , Ou Jian Ping
Published: September 2013

Based on the common used coals and designed coal in a power plant in Hunan, a non-linear coal blending model was built. Exhaust algorithm, genetic algorithm and simulated annealing algorithm were used to solve the model respectively using the lowest cost of the blended coal as the objective function. Three kinds of single coals were blended together according to certain proportions based on 15 kinds of common used single coals. The coal characteristics of blended coals were predicted by the model of General Regression Neural Network. The cost, fitness and predicting time obtained by three different algorithms were compared and analyzed. The results show that the solution is ideal in cost and fitness with exhaust algorithm while the predicting time is very long. GA algorithm is good in cost, computing time and reliability.
The Influence of Microscopic Pore Structure on Microscopic Residual Oil in Sandstone Reservoir
Authors: Zhang Yan , Li Xin
Published: September 2013

The distribution of microscopic residual oil varied according to the character of rock pore structure. How pore structure effect residual oil distribution is still an unresolved problem. In this paper, different origin samples were collected, then the characters of microscopic pore structure was analyzed with mercury injection curves, casting thin sections and SEM. The character of microscopic residual oil was observed with fluorescence thin sections. The study showed that after strong water flooding, the microscopic residual oil was mainly composed of intergranular type and cluster type residual oil, but the proportion of different type of residual oil varied according to different microscope pore structure. the smaller the radius of pore structure is, the higher the proportion of intergranular type and cluster type remaining oil is, but the lower the proportion of corner type, membranous type and throat type is.
Filter Technology in the Switching Power Supply
Authors: Zhang Zhi Hong , Zhang Bao Feng , Li Guang Quan
Published: September 2013

With the increase of switching frequency of power switch, EMI noise pollution becomes more and more serious. In order to solve this problem, in this paper, the switch power supply filter and passive EMI filter, active EMI filter is studied. It mainly research active EMI filter with feed forward , non-inductive current detection device of active EMI filter and active EMI filter for three-phase inverter motor. To solve this problem which is that EMI noise pollution has become more serious along with the increase of switching frequency switch power supply, the increasingly serious pollution make the EMI filter technology have a wide range of applications and put forward higher request to filter technology
Analysis of Energy Efficiency in Construction Solutions at the Façade-Slab Connection
Authors: Vercher Jose , Lerma Carlos , Vidal Marisol , Gil Enrique
Published: September 2013

Façade-slab connection is the main thermal bridge of buildings. In this work, different options are analyzed according to the location of the thermal insulation. Heat loss is measured for each option. According to thermal analysis performed we conclude that cover the buildings façade completely without interruption at the slabs front is essential to avoid thermal bridges. The new option that interrupts the cantilever to put insulation on the entire façade is just effective to isolate the entire cantilever and is an easier constructive solution. This insulation continuity is needed to prevent ceiling condensation, since the energy saving is not important compared to windows thermal loss.
Efficacy of Resinous Polypropylene (PP) Fibers on Strength Behavior of Reinforced Soils
Authors: Shahrokhabadi Shahriar , Nazeryzadeh Najme
Published: September 2013

In the current study, Laboratory uniaxial compression tests are carried out in order to determine the strength and mechanical behavior of silty sand reinforced with randomly distributed short resinous Polypropylene (PP) fibers. The stress-strain behavior of composite materials is investigated through varying the number and length of PP fibers. In order to study the effects of the length and weight percent of fibers on the results of the uniaxial compressive strength, tests were accomplished on specimens with three different lengths and weight percentages of fibers. The results demonstrate increasing weight percent of fibers, in a constant length, leads to increase the maximum strength. Meanwhile, increasing the length of fibers, in a constant weight percent, reduces the maximum strength. Moisture absorbency of fibers which was about 120% at first, however, could be reduced to just 9% by using the epoxy polyamide resin. Moreover, the resin causes more interaction between sand aggregates and fibers leading to a higher internal friction angle.
Seismic Tests on RC Building Exterior Joints with Wide Beams
Authors: Masi Angelo , Santarsiero Giuseppe
Published: September 2013

Reliable assessment procedures of existing RC buildings are currently available, and have been introduced in the Italian and European codes reporting new rules for seismic analysis. However, further studies are required in order to further improve such procedures and, specifically, obtain more accurate data on the behavior of beam-column joints, whose role on the global behavior of framed RC buildings can be crucial. Until now studies on this issue have been mainly devoted to joint specimens with stiff beams, however frame structures having wide (also called flexible or flat) beams are widely used in the European residential building stock. To this purpose, given the lack of knowledge, an experimental investigation on full scale beam-column joints with wide beam has been planned and is currently in progress. In the present paper the main results of three tests are reported and discussed. The role of different earthquake resistant design levels on joint performances is pointed out.
Research on the Resistance Acting on the Bucket during Shovelling
Authors: Ning Yue , Liu Xin Hui
Published: September 2013

In the working process of the loader, energy is mainly consumed in the shovelling process. It is necessary to analysis the resistance acting on the bucket. Firstly, this paper takes bucket and material systems as the research object, analyzes constitutive relation of the system and models the resistance by applying earth pressure theory. By experiments, the resistance is measured when the bucket inserts the material. Finally, the comparison of the experiments results and theoretical ones shows that the models building in the paper are reasonable.
Random Vibration Analysis of Rivets on Payload Structure
Authors: Yang Wen , Zhao Li Bin , Liu Feng Rui
Published: September 2013

A payload structure is joined by rivets, which are potential weakness in random vibrations and thus require safety examination. Based on the general finite element software ANSYS®, a 3D whole-local finite element model of payload structure was established. The strength evaluation method is determined for rivets through a determinate transient dynamics analysis and related experiment under half sine impulse load. A Power Spectral Density (PSD) analysis is carried out and the rivets under random vibration environment were analyzed. The results of the random vibration analysis show that the design scheme of rivets is feasible.