bluuebunny/crossref_metadata_2025 huggingface dataset:
The Technological Integration of Digital City and Ecological City — Take Sino-Finland Gongqing DigiEcoCity as an Example
Authors: Yang Qi Yong , Zhang Xin Hua , Tao Chun Yuan , Wang Ying Xiang , Mauri Tommila
Published: May 2013

In recent years the tide of interest in ecocities is rising in China. The symbiotic integration of digital city and ecological city is the new model of urban development in the future. Gongqing DigiEcoCity is a strategic cooperation project between China and Finland to improve the living environment and build an ecological civilization. The paper defines the concept of DigiEcoCity and the practice of Gongqing DigiEcoCity supported by Finland in technology. Further, the paper explores the technological integration of digital city and ecocity from three aspects: Digi-concepts, Eco-concepts, City-concepts. Especially, the scalable, localisable and replicable Key Performance Indicators (KPI) for Gongqing DigiEcoCity planning are put forward and discussed to testify its ecological suitability and livability. The paper argues that Gongqing DigiEcoCity is a model for an ideal city combining the principles of sustainable development, the innovations by the digital revolution and the urban functions necessary for providing a framework of good everyday life. The paper also argues that the concept of developing digiecocity requires not only the successful completion of a project and planning, but also the long-term maintenance in the practice and their acceptance by the public.
Orini and Powire: Reviving the Locality of Laika for Sustainable Design
Authors: Yusran Yusfan Adeputera , Citraningrum Andika
Published: May 2013

Vernacular architecture are known to be more adaptable to their environment, due to the local wisdom evolved over many generations. The purpose of this study is to make an attempt at highlighting orini and powire, elements of Tolaki traditional house, as a solution in the development of contemporary environmentally friendly architectural design. The results of this study indicate that the statement contained in Laika is an architectural expression derived from the perspectives inherent in the Tolakinese way of life. CFD simulation on Laika also shows that the use of orini and powire can reduce the indoor air temperature. This study is expected to strengthen the theoretical foundations of Tolaki architecture, considering that Laika, as a physical structure, no longer exists.
Life Cycle Energy and CO2 Emissions of Residential Buildings in Bandung, Indonesia
Authors: Surahman Usep , Kubota Tetsu
Published: May 2013

This study aims to develop a simplified life cycle assessment model for residential buildings in Indonesia, which can be used under relatively poor data availability conditions. In order to obtain material inventory data and household energy consumption profiles for constructing the above model, a survey was conducted in Bandung in 2011. This paper analyzes life cycle energy and CO2 emissions employing an input-output analysis-based method within unplanned houses (n=250), which are classified into three categories, namely simple, medium and luxurious houses. The results showed that the average embodied energy of simple, medium and luxurious houses was 36.3, 130.0 and 367.7 GJ respectively. The cement consumed the largest energy and emitted the most CO2 emissions among all materials. The annual average operational energy of simple, medium and luxurious houses varied widely at 11.6, 17.4 and 32.1 GJ/year respectively. The energy consumption for cooking accounted for the largest percentage of operational energy. The profiles of life cycle CO2 emissions were similar with those of life cycle energy. The factors affecting embodied, operational and life cycle energy were also studied.
Research of Graphic User Interface of Carbon Dioxide Emission Evaluation Model in Construction Life Cycle Based on Matlab
Authors: Gan Xue Hong , Wang Wei , Liu Shi Mei
Published: May 2013

To build carbon dioxide emission evaluation model in construction life cycle is the key link to make low-carbon research of theoretical studies head towards practical application. For the first time, residential quarter is selected as the object in the study, carbon dioxide emission management responsibility of owner and property being considered and carbon dioxide emission evaluation model in construction life cycle based on matlab as well as database of carbon dioxide factor being built initially. Net carbon dioxide emission information will be shown timely, then carbon dioxide emission and absorption can be adjusted by property management accordingly.
Influence of Sand Concentration on Variation Characteristics of Aquifer Parameters under Groundwater Source Heat Pump Long-Term Operation
Authors: Wang Song Qing , He Shi Jing
Published: May 2013

The influence of sand concentration on variation characteristics of aquifer parameters, under groundwater source heat pump long-term operation, is theoretically analyzed through numerical simulation method. The present studies show that the sand concentration obviously affects the variations of the porosity and hydraulic conductivity, however, the variation of confined water head is affected inconspicuously. The variations of aquifer parameters are also related with the seepage velocity.
Awareness of 3R's Critical Success Factor for Greener Higher Educational Institutions
Authors: Jibril Jibril Danazimi , Bin Sipan Ibrahim , Zulkepli Masitah Binti , Aminu Dodo Yakubu , Jogana Musa Ali
Published: May 2013

Awareness of solid waste reduction programs is the priority in institutions of higher learning nowadays for a greener environment, thus brought about the issues of 3r's (reduce, reuse and recycle) practice by all the waste generator within Urban and Higher educational institutions (HEIs) around the globe. Integrated solid waste management hierarchy was adopted to enlighten the waste generators to use them in 3r's critical success factor as a substantial method to deal with the situation, given priority to the waste reduction. This paper highlight the awareness method of 3r's and interdependent nature of the higher education institution's environment, as these can result in cost avoidance, and enhance the systematic practice and lessen environmental impacts for effective and efficient solid waste management in HEI's.
Energy-Saving Patterns of Iranian Traditional Architecture in Various Climates
Authors: Fardpour Tohid
Published: May 2013

Iranian traditional architecture has always been a good example of climatic design and represents the techniques which our ancestors have found to improve their living conditions. By paying attention on Iranian traditional architecture we could confirm that its rules suit buildings in best way in sustainability and in correspondence to the local cultural, topographical and climatic conditions which have the least adverse effect on environment. One of the most significant features of traditional Iranian architecture is the special architectural specification in various climates, which makes each region distinct from the others. Investigations of different Iranian regions indicate that in past, different techniques and methods for controlling and making air movement in interior space of the building were common. Harsh climate of these areas in Iran forced people to build their houses with some strategies based on efficient energy consumption. In this paper different solutions of sustainability will be discussed in three different climate regions of Iran: hot-arid region, hot-humid region and humid-rainy regions (Southern Shores of Caspian Sea Region)
Research on Ecological Experience of Traditional Dwellings in Zhejiang Province
Authors: Zhang Yan
Published: May 2013

At present, China is facing with the dilemma that energy consumption for rural dwellings is excessive. Therefore it is the responsibility of every architect to improve the situation. The traditional dwellings in Zhejiang province are the products of labor formed in the long-term construction practice in which the ancients were dealing with natural and social factors as it consists of a lot of simple ecological construction experience. On the basis of on-the-spot investigation and comprehensive literature research, the ecological construction characteristics and adaptive design are analyzed in detail in this paper on site selection, general layout, ingenious organization for virtual space of buildings, material selection and water resources utilization etc.. It is, thus, expected to provide valuable experience and basis for contemporary ecological and energy-saving rural dwellings.
Surface Morphology and the Adsorptive Behavior of Coconut Active Carbon
Authors: Li Xiao Qiang , Lan Li Juan
Published: May 2013

Active carbon modified by hydrochloric acid was prepared with impregnation method. The synthesized material was characterized by scanning electron microscopy. It was proved that plenty of pores with diameter of about 5-10μm were exist on the surface of active carbon. The adsorption process with toluene was performed over the modified active carbon to investigate the adsorptive efficiency. For comparison, other porous materials were also performed the adsorption experiment. The results showed that active carbon modified by hydrochloric acid has high adsorptive efficiency for toluene. The results proved that adsorptive performance of active carbon increased with the hydrochloric acid concentration.
Adsorption Characteristic of Steel Slag Haydite for Phosphorus Removal from Wastewater
Authors: Liu Xiao , Yang Mei , Yang Yong
Published: May 2013

Slag haydite made from steel slag and clay was used for phosphate adsorption, and adsorption characteristic was studied. Results showed that the uptake of phosphate was facilitated for pH 3-8, the adsorption process fitted with pseudo-second-order model and intra-particle diffusion model, and the equilibrium time was about 3h. Isotherm adsorption data on slag haydite were fitted by both the Freundlich and Langmuir models. It was found that the data follows the Langmuir model better, and the maximum adsorption capacity increased from 1.17mg·g-1 to 2.42mg·g-1 as temperature rose from 20°C to 40°C. Thermodynamic parameters G0, H0 andS0 showed that the adsorption was spontaneous, endothermic and entropy increase process and increasing temperature was favorable.
Study on Cyclone Dust Removal Equipment after Dense Phase Semi-Dry Flue Gas Desulfurization System
Authors: Liang Bao Rui , Song Cun Yi , Tong Zhen Song , Jia Qian , Lu Xi Ning , Zhang Yue
Published: May 2013

In order to achieve the purpose of pre-dusting device efficiency, low resistance, energy-saving after dense phase Semi-dry flue gas desulfurization system. In this paper, computer numerical simulation as the main research method, use single factor and orthogonal method, simulation study of the various factors that affect the performance of the octagon separator, get the law of different factors for separator performance. And designing a separator structure model, use this model as a sintering plant dense phase pre-dusting device after the semi-dry flue gas desulfurization system, get the separation efficiency of 37.6% , obtain the desired effect of better engineering.
On the Generation of Seaquake Velocity Fields for Submerged Floating Tunnel Structures
Authors: Shi Chun Xia , Martinelli Luca
Published: May 2013

Submerged Floating Tunnels are a new type of infrastructure, still representing a challenge in structural engineering both from the theoretical and the practical point of view. In this paper some issues arisen in generating the seaquake input (transmission through water of the effects of the seabed seismic motion) for a 3D finite element analysis of Submerged Floating Tunnels are presented and discussed. This loading source has been pointed out buy preliminary analyses as an important additional hydrodynamic loading on the tunnel which can play a significant role, and thus deserves further investigations.
Adsorption of Acid Red by Porous Chitosan Film
Authors: Feng Tao , Xu Lei , Zhang Fan
Published: May 2013

The preparation, characterization, and environmental application of crosslinked porous chitosan films for Acid red (AR) adsorption have been investigated. The adsorbent was characterized by scanning electron microscope (SEM). The adsorption experiments were carried out in a batch system to optimize operation variables: contact time, Acid red concentration, temperature, and pH. The results indicated crosslinked porous chitosan films could successfully remove 96% of Acid red. The adsorption equilibrium isotherms showed that the sorption processes were better fitted by Langmuir equation.
Asymmetric Synthesis of Ethyl (R)-4-Chloro-3-Hydroxybutanoate with a Two Recombinant Escherichia coli System
Authors: Jing Ke Ju , Ban Wen Ting
Published: May 2013

The asymmetric reduction of ethyl 4-chloro-acetoacetate (CAAE) to ethyl (R)-4-chloro-3- hydroxybutanoate (R-CHBE) biocatalysed by the aldehyde reductase of Sporobolomyces salmonicolor expressed in E. coli M15 (pQE30-alr) in combination with regeneration of NADPH by the glucose dehydrogenase of Bacillus megaterium expressed in E. coli M15 (pQE30-gdh) was reported. The bioreduction was carried out in a two-phase reaction system with n-butyl acetate as an organic solvent. Bioconversion of 300 mmol CAAE with a final yield of 97.5 % and an enantiometric excess of 99 % was achieved without the addition of cofactor NADPH.
Immunomodulatory Activity in Vivo of Porcine Cartilage Polysaccharide Nanoparticles on Murine H22 Hepatocarcinoma Cells
Authors: Fang Jing Jing , Zhu Zhen Yuan , Teng An Guo , Zheng Guo Qiang , Wang Wen Hang , Zheng Jie , Liu An Jun
Published: May 2013

The immunostimulatory activity of porcine cartilage polysaccharide nanoparticles was evaluated by using in vivo animal models. The results demonstrated that porcine cartilage polysaccharide nanoparticles not only signiﬁcantly prolonged the survival period in H22tumor-bearing mice and inhibiting H22cells proliferation, but also remarkably increased the spleen index and thymus index. These results suggest that porcine cartilage polysaccharide nanoparticles might be a strong natural immunomodulator and the antitumor effect of these nanoparticles is associated with its potent immunostimulating effect.
Green Manufacturing Operation Mode for Iron & Steel Enterprise
Authors: He Zhi Peng , Zhang Hua , Wang Yan Hong , Jiang Zhi Gang
Published: May 2013

According to the present situation of lack of systemic analysis for green manufacturing operation mode for iron & steel enterprise in domestic and overseas, and based on the theory and method of green manufacturing and the operation law of iron & steel enterprise, a kind of five layer structure of green manufacturing operation mode for iron & steel enterprise was put forward, a segmentation model for green iron & steel manufacturing system integrated operation based on the iron & steel product life cycle was established. The operation mode can provide guidance ideas for the iron & steel enterprises to implement green manufacturing.
Optimization of Solid State Fermentation to Improve the Degree of Hydrolysis Soybean Meal Protein
Authors: Jia Feng , Han Bing Qian , Guan Jun Jun , Yang Guo Hao , Wang Jin Shui , Qi Bin Jian
Published: May 2013

In this study, the optimization of soybean meal by solid state fermentation was investigated using temperature of start, the ratio of material to water and inoculums concentration. This work showed that temperature and moisture are the factors that most strongly influence SSF byBacillus subtilisBS-GA15 using soybean meal as substrate. The growth conditions that optimize degree of hydrolysis production are temperature of start at 30 °C, soybean meal and water at a ratio of 1:1.0(w/w), and inoculums concentration at 10%. In optimum conditions degree of hydrolysis of 13.14% was obtained.
Selectivity of the Cycloaddition of Tert-amyl Alcohol and α-methylstyrene
Authors: Xu Cui Cui , Zheng Fu Ping , Liu Yu Ping , Tian Hong Yu , Sun Bao Guo
Published: May 2013

1,1,2,3,3-Pentamethylindane was synthesized by alkylation of tert-amyl alcohol and α–methylstyrene (AMS) using sulfuric acid and sulfolane as catalyst. The effect of the volume of sulfolane on the selectivity for the cross-dimerization as compared to the dimerzation of the AMS was studied. The result shows that the selectivity increased by 32% after adding even 1 ml of sulfolane as solvent.
Study of Physicochemical Properties of Chinese Small Cabbage(Brassica chinensis L.) Stored at Four Temperatures
Authors: Zhang Li Ping , Xie Jing , Wang Tai , Xiong Qing
Published: May 2013

Chinese small cabbage (Brassica rapa L.Chinensis Group.), is one of Shanghai special vegetables, whose storage qualities were rarely studied by domestic researchers yet. Hence for, physical and chemical indexes of Chinese small cabbage ( harvested in Lingang new city, Shanghai) stored at temperature 2 °C, 6 °C, 10 °C, 15°Cwere determined in this study. It was shown that as temperature lower, the degradation rate of reduced ascorbic acid and chlorophyll were smaller, respiratory rate and weight loss rate rate were lower. Taking into account the quality of Chinese small cabbage in the whole experiment process stored at a single temperature concerned, degradation rate of nutrients , such as, reduced ascorbic acid and chlorophyll were more and more smaller. Due to environmental stress effect, total phenolic content was increased at first days, and then decreased as antioxidant capacity reducing. On the other hand, respiratory rate increased along with blade decay which was caused by injury breathing and moisture loss leading enhancement of hydrolase activity. Changes of chrome parameters like L*, a*, b*,BI, h*and E had positive correlation with physiological quality. Overall, low temperature inhibits the physiological activities of the Chinese small cabbage and prolongs the shelf life, but chilling injury should be paid attention to.
Improvement of Radiation-and Thermal Stress-Induced Springback Degradations in Invar Alloy Using Repeated Radiation Plus Hot-Then-Cold Treatments
Authors: Yang Cheng Fu , Wang Wei Wen , Pan Eddie , Lin Shou Sheu , Lin Jing Jenn
Published: May 2013

A method is proposed to improve both the gamma-ray radiation-and thermal stress-induced degradations of springback characteristics in Invar alloy. Invar foil was first subjected to a 30 kGy-irradiation followed by 60 cycles of hot-then-cold (radiation+hot-then-cold) treatments. It was found that both the radiation-and thermal stress-induced springback degradations in Invar foil tended to be stabilized after 5 cycles of radiation+hot-then-cold treatments. XRD analyses showed no difference between controls and experimental samples, thus excluding the possibility of structural or phase transformations. The weak bonds inside the foil possibly rearranged and recovered during the radiation+hot-then-cold processes, resulting in radiation-and thermal stress-hard springback behaviors.
The Classification and Characteristic of Proteins in Wheat
Authors: Wang Jin Shui , Jia Feng , Yang Xiao Jia , Qi Bin Jian , Qu Ling Bo
Published: May 2013

Wheat is the most important foodstuff in the world. The proteins in wheat were classified into solubility groups and insolubility. Moreover, the proteins of wheat were divided into four groups, which are glutenin, gliadins, globulins and albumins. The work was according these four characteristic of proteins in wheat to review. This work may provide a useful tool for researching proteins in wheat in the future.
Construction of Expression Vector with Fruit-Specific Promoter and Genetic Transformation of Strawberry
Authors: Song Xiang Li , Wu Zhi Hui , Zhang Xi , Lu Meng Xi , Guo Bei
Published: May 2013

In order to transcription and expression an exogenous gene just in transgenic strawberry fruit, the gene encoding tomato fruit-specific E8 promoter was cloned. We constructed plant expression vector with E8 promoter replace the CaMV35S of pBI121 that used for transformation of strawberry. Recombination plasmid was identified by PCR, restriction enzymes digestion and sequencing analysis, and transfered into the agrobacterium EHA105 strain. At the same time, the agrobacterium EHA105, transformation and no transformation tissue of strawberry used as the experiment materials to study the expression of reporter genegusAby the histochemical staining method. The results show that agrobacterium which containsgusAgene and strawberry organization of transformation can be dyed blue, others were not stain. So in testing the transgenic plants by agroinfiltration transient expression system can reduce or avoid false positive appearance.
Effect of Xylanase Treatment on Papermaking Properties of Poplar High Yield Pulp
Authors: Wang Wei , Yang Gui Hua , Chen Jia Chuan
Published: May 2013

Xylanase is effective and specificity to xylose catalytic degradation, and has strong adaptability. In this paper, effect of xylanase treatment on the drainge and physical properties of high yield pulp was studied. The results showed that, compared with the untreated high yield pulp .The brightness of the treated pulp increased 1.84 %ISO, light scattering coefficient alse increased, opacity coefficient decreased. Tearing index, breaking length and bursting index respectively increased by 15.7%,9.07% and 14.85%.
High-Purity Isolation of Trans-Resveratrol from Rhizma Polygoni Cuspidati by High-Speed Counter-Current Chromatography
Authors: Deng Jian Chao , Li Lai Hao , Yang Xian Qing , Lu Su Ping , Wu Yan Yan , Hao Shu Xian , Qi Bo
Published: May 2013

In this paper, high-speed counter-current chromatography (HSCCC) was established and successfully applied for the separation and purification of trans-resveratrol from Rhizma Polygoni Cuspidati. After extracted by microwave assisted extraction (MAE), the dry extract was directly dissolved in HSCCC solvent and introduced to HSCCC separation system. Two-phase solvent system of HSCCC was optimized. Trans-resveratrol was separated from extract of Rhizma Polygoni Cuspidati by high-speed counter-current chromatography in two-step using two different solvent systems composed of chloroform-methanol-water (4:3:2, v/v/v) and n-hexane-ethyl acetate-methanol-water (3:5:4:6, v/v/v/v). From 200 mg of crude extract, 2.5 mg of trans-resveratrol was obtained at over 99% purity by HPLC analyses, and its chemical structure was identified by ESI-MS, 1H NMR.
Investigation of Airflow Influence on Self-Heating Process of Linseed Oil Using Safety Calorimeter SEDEX
Authors: Hrušovský Ivan , Balog Karol , Martinka Jozef , Chrebet Tomáš
Published: May 2013

The oxidative self-heating process of vegetable oil with high content of unsaturated fatty acids was investigated by the means of sequential scanning calorimetry in safety calorimeter SEDEX. The oil was applied on the cotton, and was put to the standard pressure sample vessel, which was modified for air inlet. The behavior of sample was studied under three rates of air flow. First experiment was carried out in the temperature range between approximately 30 and 350°C at a heating rate of 45°C/h. Second scanning was carried out in the temperature range from 30 to 200°C at heating rate of 10°C/h.
Isolation of Saccharomyces Cerevisiae GJ03 from the Spontanous Fermentation Orange Wine and Application in the Course of Orange Wine Brewing
Authors: Xu Wei , Wang Jing , Zhang Da Wei
Published: May 2013

Four preponderant yeast strains (GJ01, GJ02, GJ03 and GJ04) were isolated from the spontaneous fermentation pear wine as source of yeast for wine making from pear. Ethanol yield of GJ03 was the highest and its using rapidity of the sugar was the most quickly. GJ03 was identified as Saccharomyces cerevisiae and named Saccharomyces cerevisiae GJ03. The orange wine fermented associated by Saccharomyces cerevisiae GJ03 was the best in quality by sensory evaluation among all orange wines whose ethanol concentration was 9.06% (v/v).
Study on the Emulsifying Properties of Tilapia Skin Gelatin
Authors: Xia Guang Hua , Shen Xuan Ri , Liu Zhe , Li Peng , Jiu Zhi Qiang
Published: May 2013

In order to know better about the properties of tilapia skin gelatin, we discussed the oil-holding capacity, emulsifying property of the gelatin, and modified the structure of gelatin by pectin to improve its emulsifying property. The results indicated that the gelatin has strong oil-holding capacity, and shows well EAI and ESI under the following conditions: concentration of gelatin 1% (w/v), concentration of NaCl 0.2M, pH far away from 5. The emulsifying property of the gelatin was significantly improved by pectin,
The Spectrum Properties of Type Ι Collagen Self-Assembly Film
Authors: Zhang Ju Cheng , Yan He Ping , Zhang Guo Wei , Zhang Li
Published: May 2013

The type I collagen was used to prepare self-assembly film, the UV-vis spectrophotometer and Fluorescence spectrophotometer were employed to characterize those self-assembly films. The Fe (NO3)3 and CuSO4 were used as the additive to investigate the effect of the type I collagen film. It was found that the character spectra of collagen solution and self-assembly film were different, the Fe (NO3)3 enhanced the 408nm fluorescence emission peak, and CuSO4 caused a new emission peak at 399nm. The changes in the fluorescence of films suggest that the metal salt could affect the type I collagen self-assembly.
Theoretical Investigation on Tautomerization Mechanism of 6-Thioguanine
Authors: Ren Hong Jiang
Published: May 2013

The tautomerization reaction mechanisms between three stable 6-thioguanine tautomers were investigated theoretically using B3LYP/6-311+G(d,p) method. The results show that the pathway P(1) is to isomerize from TG(9,10,10,11) to TG(1,9,10,10) and the needed activation Gibbs free energy barrier is 112.7 kJ/mol with the rate constant of 1.12×10-7 s-1. Another two pathways P(2) and P(3) are to isomerize from TG(1,9,10,10) to TG(1,7,10,10) and the activation Gibbs free energy barriers of the rate-determining steps are 227.4 and 281.6 kJ/mol, respectively, with the related rate constants of 8.96×10-28 s-1 and 2.86×10-37 s-1, these results implying the intramolecular proton transfer reactions are infeasible in the gas phase.
Study on Amphiphilic Macromolecules Adsorbent of Cellulose Mixes Ether Based on Cotton Stalk
Authors: Hao Hong Ying , Shao Zi Qiang
Published: May 2013

in this work, the organic macromolecules adsorbent cyanoethylated carboxymethyl cellulose having hydrophilic and lipophilicity characteristics were preparated through properly carboxymethylation and cyanoethylation process, basing on cotton stalk cellulose treated by steam explosion as raw material, which the content of cellulose in the product is 72.6%. The effect of carboxymethylation degree on cyanoethylation degree was discussed. Then its characteristics of solubility, thermal properties, acid resistance and absorptive property were researched
Preparation and Characterization of Regenerated Wool Protein PAN Blended Fibers
Authors: Wei Ju , Liu Hao , Xu Si Jin , Zheng Lai Jiu , Du Bing
Published: May 2013

Wasted wool fibers were dissolved by reductive method. The dissolved wool protein was extracted by the membrane technology and blended with the Polyacrylonitrile (PAN) polymer to prepare regenerated fiber. Effects of pH value and dissolution assisting agent type on dissolution percentage of the wasted wool fibers in sodium pyrosulfite reductive system were investigated. Effects of the drawing times on properties of the fibers were also studied. Results indicated that the dissolution percentage rose with the increase of pH value of the reductive solution. Metallic salts have better dissolution assisting effect than urea. Breakage percentage of the as-spun fiber and tenacity of the regenerated protein fiber rose with the increase of the drawing times.
Removal Efficiency and Distribution Characteristics of PAHs in Coking Plant Contaminated Soils by In Situ Chemical Oxidation Remediation
Authors: Ma Wei Fang , Guo Hao , Ye Jian Dong , Han Dong Mei , Ma Xiong Wei
Published: May 2013

The aim of this study was to investigate the PAHs removal efficiency in coking plant contaminated soil when disposed by different oxidants with different dosages (hydrogen peroxide, Fenton’s reagent, modified Fenton’s reagent, potassium permanganate, activated sodium persulfate) and the PAHs distribution characteristics in removing parts, soil residue parts, recycling parts and supernate after oxidation reactions. Analyzed the variation characteristics of soil properties (pH and soil temperature) when used different oxidants in oxidation reactions process, screened out the effective and safe remediation oxidants. The research results indicated that the potassium permanganate has the best remediation ability and undemanding reaction conditions than other oxidants. The contaminant which be volatilized into surrounding environment was rarely when disposed by potassium permanganate in remediation process. Consequently, selecting potassium permanganate as remediation oxidant to treat PAHs in coking plant contaminated soils was the best choice.
Cascaded Columns of Total Reflux Batch Distillation with Periodic Liquid Exchange
Authors: Tang Ke , Bai Peng
Published: May 2013

A new type of operation mode of cascaded columns of total reflux batch distillation with periodic liquid exchange was proposed. The feasibility of the new operation, which is suitable for separations of mixtures of close boiling point, thermo-sensitive material and isotopes, was proved by the experiments in which two columns and three columns in periodic liquid exchange were used with ethanol-isopropanol, ethylbenzene- paraxylene as the experimental mixtures. The results indicate that the new operation mode can generate summation effect of theoretical plates by periodic liquid exchange between columns, while the total pressure drop is the same as that of a single column.
Effects of Microwave Power on Performance of Pt/CeO2MWCNTs Catalysts Prepared by Microwave-Assisted Polyol Process for Methanol Electrooxidation
Authors: Gu Yu , Liu Chun Tao , Gao Jian , Wang Kuo , Sun Yong Rong , Du Chun Yu
Published: May 2013

Pt/CeO2/multi-walled carbon nanotubes (Pt/CeO2/MWCNTs) catalysts have been synthesized by microwave-assisted polyol process at different microwave power values. The obtained samples have been characterized by physical examinations and electrochemical measurements. The effects of different microwave power on performance of Pt/CeO2/MWCNTs have been mainly investigated. The results of physical examinations show that Pt nanoparticles have a narrow size and Pt nanoparticles and CeO2 units are highly dispersed on the surface of MWCNTs. The results of electrochemical measurements present that Pt/CeO2/MWCNTs catalysts by microwave-assisSubscript textted polyol process have higher catalytic activity and stability than Pt/MWCNTs catalyst by the same procedure. When the value of microwave power is 70%, the Pt/CeO2/MWCNTs catalyst has the smallest particle size and exhibits the highest activity and stability of methanol electrooxidation.
Modified Cuo/ZnO/Al2O3 Catalysts for Methanol Synthesis from Co and CO2 Co-Hydrogenation
Authors: Gao Wen Gui , Wang Hua , Liu Wen Yan , Zhang Feng Jie
Published: May 2013

A series of CuO-ZnO-Al2O3catalysts modified by different promoter were prepared by co-precipitation or incipient wet impregnation and characterized by X-ray diffraction (XRD), N2physisorption, hydrogen temperature-programmed reduction (H2-TPR) and carbon dioxide temperature-programmed desorption (CO2-TPD). The modified catalysts were tested for methanol synthesis from CO/CO2co-hydrogenation in a fixed bed reactor with feed containing CO, CO2and H2(CO:CO2:H2=1.0:1.08:6.24, volume radio). It is revealed that the catalysts modified by Zr, Mg, Ca has higher activity of methanol synthesis by CO and CO2co-hydrogenation. Especially, the addition of Zr enhances the conversion of total carbon and the selectivity of methanol, which is due to the improved surface area, much more active sites, and the synergistically interaction between CuO and ZnO caused by the addition of Zr promoter.
Preparation and Properties of Silane-Terminated Poly(urethane-Imide)
Authors: Hu Xiao Xi , Wang Yun
Published: May 2013

A serious of silane-terminated poly (urethane-imide) (Si-PUI) was synthesized via prepolymer method using polycarbonatediols (PCDL), 2,4-tolylene diisocyanate (TDI), 4,4'-Oxydiphthalic Anhydride (ODPA) and silane coupling agent KH-550. The structure of the products was characterized by FT-IR. The thermal properties were measured by thermal gravimetric analysis (TGA). The thermal mechanical behavior was investigated by dynamic mechanical analysis (DMA).The mechanical characteristic was measured by tensile tests. The water absorption (Wa) was also been tested. With the imide content increasing, the thermal stability, tensile strength and storage modulus of poly (urethane-imide) improve significantly, and the glass transition temperature rises. The introduction of silanes improves the water resistance and further enhances the thermal stability of poly (urethane-imide).
Preparation of High Heat-Resistant Profile Based on PVC/α-MSAN/ABS Ternary Blends
Authors: Wang Xing , Guo Shao Yun , Yang Fei Hu
Published: May 2013

In this paper, ternary blends of PVC mixed with α-methyl styrene-acrylonitrile (α-MSAN) and toughening modifier was prepared, with the aim to obtain a high performance PVC profile with an improved heat resistant temperature, better impact property and good processability. The results of dynamic mechanical analysis (DMA) showed the good miscibility owing to the additional intermolecular interaction between α-hydrogen of PVC and AN of α-MSAN. The glass transition temperature (Tg) and vicat softening temperature (VST) were improved remarkably with introduction of α-MSAN due to excellent heat resistant property of α-MSAN. With regard to mechanical and process properties, the impact strength and dynamic rheological property were evaluated.
Synthesis of a New Water-Soluble Conjugated Polymers Containing Thiazoline Moiety for Antibacterial Activity Bioassay
Authors: Liu Ji Ping , Wu Yan Hua , Liu Lei , Xiao Yu Mei , Ma Xiao Dong , Fu Bin
Published: May 2013

The water-soluble cationic polyfluorene derivatives PFP-N(Me)3+I- and PFP-T containing the thiazoline cycle on side chain was designed and synthesized. The preliminary bioassay was carried out for the thiazolines and polymers at different concentrations. The antibacterial activity of the polymers and thiazolines were determined with E.coli by growth inhibition assays. The results demonstrate that the polymer containing thiazoline cycle (PFP-T) has a higher inhibition ratio against E.coli than the thiazoline compound itself and the corresponding thiazoline quaternary ammonium.
Research on the Relationship between the Productivity of Antarctic Krill Chitin and its Fineness of Grind
Authors: Liang Yu Jia , Ji Ying Chao , Wang Ying , Wang Qiu Hong , Li Hong
Published: May 2013

It has been proved that chitin content in Antarctic krill is much higher than other marine shelled organisms; therefore, people pay much more attention to the extraction and application of the chitin in Antarctic krill. During the experiments which use the traditional acid and alkali method to extract the chitin from Antarctic krill, the chitin’s extraction efficiency was found out to have a great influence on the degree of grinding the shell. After testing and then come to a conclusion that based on the chitin content: extraction efficiency, concentration and dosage of the acid and alkali as well as many other factors, the material’s fineness should be within forty mesh. And the optimum process conditions are: alkali treatment: concentration 25%, solid-liquid ratio 1:10, temperature 95°C, 2 hours; acid treatment: concentration 10%, solid-liquid ratio 1:10, temperature 60°C, 2 hours. By this way, 94.254% high-purity chitin was produced.
Research on Fatigue Behavior of Beam with Corrugated Steel Webs
Authors: Hu Xiao Long , Tan Lian Fei , Wang Qing Xuan
Published: May 2013

This paper present that experimental research on the fatigue behavior of beam with Q345c steel corrugated webs. There are four test specimens with different structural feature will be tested in three-point bending to load by Shinmadzu 4890 fatigue testing machine. Moreover, the finite-element analysis will be used to simulate the fatigue behavior of common beam with corrugated steel web. Weld will be our focus on importance object.
Aluminum-Induced Crystalization of Amorphous Silicon Films Deposited by Megnetron Sputtering
Authors: Qian Jun , Shi Wei Min , Jin Jing , Li Ji Rong , Liao Yang
Published: May 2013

Aluminum–induced crystallization of sputtered a-Si under two-step annealing procedure on glass substrate is studied. A 200 nm thick a-Si film was deposited by magnetron sputtering on glass and a Al film of 150 nm was sputtered on top. The samples were annealed under two-step annealing procedure. Nucleation and growth of grains were followed by optical microscopy (OM), X-ray diffraction (XRD), Raman spectroscopy, and energy dispersive spectroscopy (EDS). Continuous (111) oriented poly-Si films were obtained with a Raman Peak at 520.8cm-1. The different annealing periods is discussed.
Electrodeposition and Properties of CuInS2 Thin Films
Authors: Zhou Hai Fang , Chen Xiao Hu
Published: May 2013

The preparation and characterization of CuInS2 thin films on ITO glass substrates prepared by one-step electrodeposition have been reported. Samples were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). The results indicate that CuInS2 is the major phase for the film deposited at -1.0 V, after annealing at 550°C in sulfur atmosphere, and the sample is Cu-rich and p-type semiconductor. Additionally, the energy band gap and carrier concentration for the sample were found to be 1.43 eV and 4.20×1017 cm−3, respectively. Furthermore, the maximum photocurrent density of the sample was found to be -1.15 mA/cm2 under 255 lx illumination, the sample shows the photo-enhancement effect.
On the Mechanism of Copper Oxide Reduction by Dielectric Barrier Discharge Plasma Using H2 and Ar Mixture Gases
Authors: Xu Zhi Jian , Qi Bin , Di Lan Bo
Published: May 2013

Dielectric barrier discharge (DBD) plasma was used to reduce copper oxide at atmospheric pressure using Ar and H2 mixture gases. Effect of H2 content on copper oxide reduction was investigated with a constant total flow rate of 100 mlmin-1 when the discharge voltage was kept at 36 kV. The composition of the copper oxide samples before and after DBD plasma treatment was characterized by X-ray diffraction (XRD). The results showed that energetic electrons and metastable Ar were inefficient for reduction of copper oxide in this study and the highest copper oxide reduction rate was obtained when the H2 content was 20%. In addition, no Cu2O was observed. Optical emission spectra (OES) were observed during reduction of copper oxide at different H2 contents, and the mechanism for copper oxide reduction using DBD discharge was discussed.
Effects of Preparing Conditions on NO2-Sensing Properties of Sputtered WO3 Nano-Films
Authors: Sun Feng Yun , Hu Ming , Sun Peng
Published: May 2013

WO3 nano-films were deposited on Al2O3 substrate by dc reactive magnetron sputtering method. The effects of preparing conditions, such as the discharge gas ratio (Ar:O2), working pressure, sputtering time and annealing temperature on microstructure, crystalline state and NO2-sensing properties of WO3 nano-films were investigated by orthogonal trial experiment method. The optimum technological conditions were determined by orthogonal test and extreme difference analysis. The crystallization, morphology and composition of WO3 thin film obtained at the optimal parameters were studied by XRD, SEM and XPS. The gas sensing mechanism was also studied. WO3 nano-film shows high sensitivity, fast response, good selectivity at the best operating temperature 200°C.
Electrochromic Property of Sputtered Amorphous NiO Films
Authors: Wang Chih Ming , Wen Chih Yu , Chen Ying Chung , Lin Shih Yuan , Shiau Shiu Ting
Published: May 2013

Nickel oxide (NiO) thin films were deposited on ITO/glass substrates by radio frequency magnetron sputtering. The electrochromic property of NiO films was investigated using cyclic voltammograms (CV), performed on NiO films immersed in an electrolyte of 1 M LiClO4in propylene carbonate (PC). Optical, electrochemical and structural properties of the films, as a function of coloration–bleaching cycle, were characterized using an UV-Vis-NIR spectrophotometer, cyclic voltammetry (CV), X-ray diffraction(XRD) and a field emission scanning electron microscope (FE-SEM). The optimal electrochromic NiO film, with a thickness of 180 nm, exhibits a maximum transmittance variation (ΔT%) of 53.97 %, an optical density change (ΔOD) of 0.66, an intercalation charge (Q) of 14.65 mC/cm2, and a coloration efficiency (η) of 44.85 cm2/C between the colored and bleached states at a wavelength (λ) of 550 nm.
Structure Characterization of W-Doped Vanadium Oxide Thin Films Prepared by Reactive Magnetron Sputtering
Authors: Chen Shuang , Zhang Li Fang , Xiao Shu Juan , Dong Cui Zhi
Published: May 2013

W-doped Vanadium oxide thin films were prepared on the substrates of SiO2 glass, float glass and Si (100) by reactive magnetron sputtering after annealing in vacuum. The structure, morphology and phase transition were characterized by X-ray diffractometer, atomic force microscopy (AFM) and differential thermal analysis (DTA), respectively. The results show that, the major phase of W-doped films on SiO2 glass is VO2.Dopant reduce the phase transition temperature of VO2 thin films to 21.9°C. The root-mean-square roughness of the film increase for the longer deposition time.
Study on Wurtzite-ScxAI1-XN Thin Film: A Review
Authors: Jia Yu Bin
Published: May 2013

A review of the recent study on w-ScxAI1-XN alloy is presented in this paper. w-ScxAI1-XN alloy is a high temperature piezoelectric material, which exhibits a good balance between high maximum use temperature and large piezoelectricity. The experiment results have shown the piezoelectric modulus d33for ScxAI1-XN with x=0.43 reached up to 27.6pCN-1, which is at least 400-500% larger than AIN. This piezoelectric alloy thin film material can be grown on various substratesCe.g. silicon (001), AI2O3(0001), MgO (111), TiN(111), etc.Cby dual radio frequency magnetron reactive co-sputtering system. The origin of the anomalous piezoelectric response based on quantum mechanical calculation and the dielectric properties based on experimental measurement in w-ScxAI1-XN alloy have been also reviewed in this paper.
Research on Powder Metallurgy High Nitrogen Stainless Steels
Authors: Cui Da Wei , Wang Jin Long
Published: May 2013

High nitrogen Fe-18Cr-12Mn-3Mo-xN austenitic stainless steels were prepared by mechanical alloying and powder metallurgical pressing-sintering techniques. The microstructures, nitrogen contents and sintering properties of the milled powders and sintered bodies had been also investigated. The results show that high nitrogen and nearly spherical composite powders with good compressibility can be obtained by high-energy vibration ball milling and high temperature nitriding. It is also found that the sintering temperature has a significant effect on the density and the nitrogen content of sintered specimens, and the optimal sintering temperature are determined to be 1250°C, at which a favorable combination of the relative density as high as 97.1% and the final nitrogen content of 0.79wt% in sintered specimens can be obtained. The sintered bodies mainly consist of γ-austenite, α-ferrite and the lamellar Cr2N phase. After solution-annealing at 1150°C for 1.5h followed by water-quenching, high nitrogen austenitic stainless steels reveal a fully austenitic structure.
First-Principles Study of the Elastic Properties of Hexagonal Phase ScAx (A=H, He)
Authors: Fan Kai Min , Yang Li , Tang Jing , Sun Qing Qiang , Zu Xiao Tao
Published: May 2013

First-principles calculations are performed to investigate the Young’s modulus, bulk modulus, shear modulus and Poisson’s ratio of hexagonal phase ScAx(A=H, He), where x=0, 0.0313, 0.125 and 0.25, represent the ratio of interstitial atoms A (A=H, He) to Sc atoms. The influences of hydrogen concentrations and helium concentrations on elastic modulus and Poisson’s ratio of ScAx(A=H, He) have been studied. The results indicate that hydrogen and helium have different effects on the elastic modulus of hexagonal phase scandium. The change mechanism of the Poisson’s ratio with the variation of the x ranging from 0 to 0.25 has also been studied in hexagonal phase ScAx(A=H, He). In addition, the changes in the charge densities of ScAxdue to the presence of hydrogen and helium have been calculated.
Reliability Study on Crack Growth Rate of ADB610 Steel
Authors: Wei Long , Wang Shi Yue , Liu Guo Shou , Yang Xi Jie
Published: May 2013

The test on fatigue crack growth rate of ADB610 steel is completed. The standard compact tension specimen is loaded by cyclic loading, whose stress ratio is constant at a value of R=0.1. Crack growth rates in the form of Paris formula at different survival levels are obtained by using three methods. After a simple comparison it is clear that crack growth rates obtained by three methods are generally same and the method based on (da/dN, delta K) has better effects on data analysis.
Super Long Life Fatigue Properties of Rail Steel U71Mn and U75V
Authors: Luo Ze Fu , Cui Shi Ming , Wu Yan Zeng , Wang Qing Yuan
Published: May 2013

Railway track steel, U71Mn and U75V were fatigued in this study, with the help of ultrasonic fatigue test system, to investigate the high cycle fatigue life behaviors. The results showed that the fatigue damage still occurs when the fatigue life exceeds 107, and the evolution of S-N curve showed a ladder type. This test showed that the traditional view of fatigue design and life prediction method were unable to meet the requirements of machinery and equipment working in gigacycle fatigue range, very high cycle fatigue behavior of fatigue has become a major challenge for researchers. The scanning electron microscope analysis of crack initiation was performed to clarify the mechanism of very high cycle fatigue failure.
The Effect of Finish Rolling Temperature on Microstructure and Mechanical Properties of Vanadium Containing Ferritic Stainless Steel
Authors: Chen Si Yue , Xu Jing , Zhang Xin , Yang Yi Tao
Published: May 2013

In this paper, the influence of finish rolling temperature during hot rolling on microstructure and mechanical properties of ferritic stainless steel containing vanadium was investigated. It showed that with the rolling temperature increasing, the tensile strength and hardness value fell down, while the value of ductility rising and less precipitates appearing. If the finish rolling temperature was set too high, the grain would get coarsened and the α-fiber get strengthened, which had an adverse effect on the formability and wrinkle resistance of the production sheet. 850°C was a reasonable finish rolling temperature.
Experimental Study on Out-Plane Crack Extension in Rimmed Steel
Authors: Yang Bang Cheng , Liu Jian Xiong , Guo Rong Xin , Xia Hai Ting
Published: May 2013

Study on the fractural mechanism of thin sheet metals focuses on how to efficiently fracture and recycle the scrapped vehicles and electrical equipments. By using the experimental fracture mechanics, the failure mode was studied for 10F rimmed steel sheets to be crushed and recycled. In-plane mode I, out-plane mixed mode I /III and mode III fracture tests were conducted under different loading angles. The effects and contributions of mixed mode crack extensions for 10F rimmed steel sheets were analyzed and some sensitive fractural factors were studied. The experimental results show that pure mode III is most viable to fracture the thin sheet 10F rimmed steels.