bluuebunny/crossref_metadata_2025 huggingface dataset:
In Vitro Antibacterial Activity of Different Polar Solvent Extracts from Oxalis
Authors: Qiu Xue Jing , He Ying Zi , Wang Xiao
Published: October 2014

The Oxalis extract was obtained by soaking with ethanol, then mixed with distilled water and successively extracted using chloroform, ethyl acetate and n-butanol. The four different polar solvent (chloroform, ethyl acetate, n-butanol, aqueous) extracts were evaporated under reduced pressure to obtain four kinds of crude extractum. Antibacterial activity on Staphylococcus aureus, Escherichia coli, Albicans Saccharomyces and Pseudomonas aeruginosa of the four fractions were studied by minimal inhibitory concentration method (MIC). The results indicated that the chloroform extract and n-butanol extract from red Oxalis have no antimicrobial activity to the above 4 bacteria; the ethyl acetate extract showed significant inhibitory activities to the above 4 bacteria, the minimal inhibitory concentration (MIC) were 2560ug/ml, 1280ug/ml, 2560ug/ml, 2560ug/ml respectively; the aqueous extract have inhibitory activity to Escherichia coli and Albicans Saccharomyces, the minimal inhibitory concentration (MIC) were 2560ug/ml, 2560ug/ml respectively, but it has no antimicrobial effect on the other two kinds of bacteria. The chloroform extract and ethyl acetate extract from yellow Oxalis have no antimicrobial activity to the above 4 bacteria; the n-butanol extract has inhibitory activity to Escherichia coli, Albicans Saccharomyces and Pseudomonas aeruginosa, the minimal inhibitory concentration (MIC) were 5120ug/ml, 5120ug/ml, 5120ug/ml respectively, but it has no antimicrobial effect on Staphylococcus aureus; the aqueous extract have inhibitory activity to Escherichia coli and Albicans Saccharomyces, the minimal inhibitory concentration (MIC) were 2560ug/ml, 5120ug/ml respectively, but it has no antimicrobial effect on the other two kinds of bacteria.
Mechanistic Basis for the Role of Binary Mixtures Flowability and Related Factors in the Processability and Performance of High Shear and Extrusion Granulation
Authors: Liao Zheng Gen , Li Zhe , Luo Juan , Ming Liang Shan , Jiang Qie Ying , Xiong Zhi Wei , Zeng Rong Gui
Published: October 2014

The purpose of this study was to establish a relationship between the raw material properties and granulation behavior in extrusion wet granulation (WEG) and high shear wet granulation (HSWG). moisture content (MC), Carr index (CI), angle of repose (AOR), and mean size distribution (MSD) of binary mixtures were examined. The effect of these variables on the processibility and performance of the granulations was evaluated by monitoring such response along with granule growth. The prominent involved findings were that moisture content and Carr index had significant impacts on granule growth, followed by particle size, while angle of repose showed a minimal correlation. These results were physically interpreted by the previous wet granulation theories. The granule growth was linked to the properties of primary mixture. And in the process of high shear and extrusion granulation process, flowability showed an important effect on critical attributes of final product. Understanding the impact of primary properties of raw materials will be useful in mapping a new material to predict its performance in these two different granulation methods.
Preparation of Compound Danshen Micropowder Tablets and Comparative Study of Pharmacokinetics with Compound Danshen Extraction Tablets
Authors: Hu Peng Yi , Zheng Qin , Gong Ying Ying , Zhang Guo Song , Yue Peng Fei , Wu Zhen Feng , Yang Ming
Published: October 2014

Compond Danshen micropowder tablets and extraction tablets were firstly prepared respectively. Then the contents of salvianolic acid B, tanshinone IIA, tanshinone I, cryptotanshinone, notoginsenoside R1,ginsenoside Rg1 and ginsenoside Rb1 in these two kinds of tablets were determined by HPLC, and the results showed that the contents in micropowder tablets were more than them in extraction tablets. A pharmacokinetic comparative study of micropowder tablets with extraction tablets by intragastric administration was developed. Pharmacokinetic parameters suggested that micropowder tablets in rats in vivo bioavailability degree (AUC), peak concentration (Cmax) were 2.14, 1.64 times than the extraction tablets, respectively, and the Tmax of micropowder tablets was longer.
A Comparison Study on Microwave-Assisted Extraction of Catalpol from Rehmannia glutinosa Libosch with Conventional Methods
Authors: Zhang Xiu Li , Li Chun Li , Yin Xue , Su Xin Yun , Yu De Hong
Published: October 2014

Catalpol, an iridoid glycoside, has been verified to be of neuroprotection and may be a potential agent for the treatment of neurodegenerative disease. The extraction technology of catalpol has been tested in this paper. We used different extraction methods including extraction at room temperature (ERT), heat reflux extraction, Soxhlet extraction, ultrasonic extraction and microwave-assisted extraction (MAE) to evaluat the percentage extraction of catapol fromRehmannia glutinosa Libosch.The extracts were analyzed by high performance liquid chromatography (HPLC). Methanol (100%, v/v) extracted high percentage extraction of catapol compared to ethanol (60%, v/v) which achieved the highest percentage extraction of catapol in different concentration of ethanol. The results showed that the percentage extraction of catalpol fromRehmannia glutinosa Liboschby MAE was more efficient in short time followed by ultrasonic extraction, Soxhlet extraction, heat reflux extraction and ERT methods. MAE has need of 4 min, whereas ultrasonic extraction, Soxhlet extraction, heat reflux extraction and ERT techniques require 70, 140, 180 min and 60 h respectively, to leach higher percentage extraction of catalpol. The time taken by MAE was nearly 18 times less than the ultrasonic extraction, 35 times less than Soxhlet extraction, 45 times less than heat reflux extraction and 900 times less than ERT for the highest percentage extraction of catalpol. The present results showed that the high extraction efficiency and considerable saving of time by MAE were more competent than the conventional extraction techniques.
Synthesis of Amino Propionic Acid Modified Polypropylene-Graft-Styrene Fiber
Authors: Sun Yao Ran , Duan Shu De , Guo Rui Xia , Hu Rui Sheng , Yun Hai Li
Published: October 2014

The amino propanoic acid chelating fiber (APACF) was prepared by immobilizing tetraethylenepentamine (TEPA) and propionic acid on polypropylene-graft-styrene (PP-g-ST). The synthetic conditions of amino PP-g-ST fiber and APACF were optimized by the way of L16(45) orthogonal experiment, and the optimizing reaction conditions were obtained. APACF was characterized by FTIR, and the changes of IR spectrum verified the introduction of carboxyl groups to the raw material. The experimental results revealed that the APACF can be used to remove and enrich copper from aqueous solution.
A Design of Optical Filter Based on Conjugate Interference
Authors: Li Zheng Ying , Zheng Lou
Published: October 2014

In this paper, a conjugate interference filter which could be used in gas sensing is presented .The filter consists of two large spot collimators and a gas etalon which has two separate cells:absorption gas chamber and non-absorption gas chamber. When cascading the broadband light to the filter , only light absorbed by the target gas can pass through the filter and the spectrum of output light matches well with the absorption spectrum of target gas.By changing the target gas in the absorption chamber ,filter for various kind of gases can be implemented. In this paper, acetylene is selected as the target gas and the spectrum of light through the filter completely matches the absorption peak of acetylene after parameter adjustments.
Evaluation of Molecular Scale in ASP Flooding Produced Liquid
Authors: Hou Zhi Feng , Qian Hui Juan , Wang Zeng Fan , Wang Bin , Liu Xiao Bo , Liu Wei Qing
Published: October 2014

The scaling is the primary bottleneck problem which blocks the industrialization of ASP technology. Exploitation mining into the late period of the scaling, particulate scaling is appeared in the environment condition of ASP flooding produced liquid. In this paper, the research on validation and evaluation for the particulate scaling was done inside. Using the treatment of hydrochloric acid and burning for the produced liquid of the Fourth Plant of Daqing Oilfield, it can confirm that the particulate scaling is in ASP produced liquid. Then, the method which is the exploitation of the particulate scaling is established. The data analysis by IR confirm that the particulate scaling is calcium carbonate which is micron or smaller.
Washing Method of Laboratory Glassware
Authors: Xiao Yi Nong , Fu Shi Feng , Li Li
Published: October 2014

In this paper, laboratory glassware with different nature of dirt and experimental requirements is required to choose different washing methods.
Theoretical Study of the Reagent Rotational Excitation Dependence for the Reactions Li + TF (v=0, j=0-5) → LiF + T
Authors: Yue Xian Fang
Published: October 2014

A quasiclassical trajectory calculation is carried out to investigate the effect of reagent rotational excitation on product rotational polarization in the reactions Li + TF(v=0, j=0-5) → LiF + T. It is found that the reagent rotational excitation slightly effect the product rotational alignment. However, the product rotational orientation becomes stronger and stronger with the increase of the reagent rotational quantum number from j=0 to j=5. The reaction mechanism for the title reactions changes from direct for j=0-1 to indirect for j=2-5.
Determination of 4 Kinds of Estrogenic Compound in Fish Samples Using Solid Phase Extraction and High Performance Liquid Chromatography
Authors: Tan Fang , Huang Lu , Zheng Qi , Chu Wei Wei
Published: October 2014

A method was developed for determination of Ethinylestradiol, Diethylstilbestrol, 4-Nonylphenol and Estradiol benzoate residue in fish samples using solid phase extraction and high performance liquid chromatography. Samples were extracted and filtered for HPLC analysis. The analysis was used gradient elution with acetonitrile-water as the mobile phase. Under the optimized conditions, a method with good reproducibility (1.16%~2.45%) and the recovery (80.0%~92.5%) was developed for target components in spiked fish samples. The calibration curves were linear with correlation coefficient ranged from 0.9970 to 0.9983. The detection limit of the method was ranged from 0.0606 to 0.6066μg/ml.This method was rapid, sensitive and nothing interfered determination of the 4 kind of components.
Graphene Oxide-Reinforced Hollow Fiber Solid-Phase Microextraction Coupled with HPLC for the Determination of Parabens in Beer
Authors: Gao Ting , Ye Neng Sheng
Published: October 2014

An effective and sensitive method to determinate four parabens was developed by using graphene oxide (GO)-reinforced hollow fiber (HF) solid-phase microextraction combined with HPLC-PDA. Scanning electron microscope characterizations indicated that graphene oxide was successfully synthesized and modified in the pores of HF by ultrasonication. The conditions including extraction time, desorption time were optimized. The liner ranges of parabens were 0.01-5.00 μg/mL via the proposed management with a limitation of detection of 0.005 μg/mL. The extraction procedure based on GO-HF was successfully used for the determination of parabens in beer.
Synthesis of the Key Intermediate of (+)-(6S,2'R)-Cryptocaryalactone
Authors: Huang Fei Fei , Liu Dong Wang , Tang Lin Jun , Qin Shuang Lin , Wang Xiao Ji , Huang Shuang Ping
Published: October 2014

A concise route to total synthesis of (+) - (6S, 2'R)-cryptocaryalactone (1) was designed and the key intermediate (7) was synthesized. The route included an Evans Aldol reaction, TBS protection and DIBAL-H reduction.
Study on Synthesis of (R)-Methyl 2-((Tert-Butoxycarbonyl)Amino)-3-((Tert-Butyldimethylsilyl)Thio)Propanoate
Authors: Qin Shuang Lin , Tang Lin Jun , Wang Li Ping , Wang Gao Peng , Huang Fei Fei , Wang Xiao Ji , Huang Shuang Ping
Published: October 2014

(R)-methyl 2-((tert-butoxycarbonyl) amino)-3-((tert-butyldimethylsilyl) thio) propanoate, an key intermediate of the natural product Biotin which is a water-soluble vitamin, involved in an essential part of the metabolic cycle causing catalytic fixation of carbon dioxide in the biosynthesis of fatty acids, sugars, and α-amino acids, was synthesized from L-cystine in overall yield 67% through three steps, which synthesis included esterification, protection of amine and thiol.
Determination of Ruthenium in Waste Ruthenium Catalysts Using Inductively Coupled Plasma Optical Emission Spectrometry after Sample Digestion by High Temperature Fusion
Authors: Pan Jian Ming , Wei Xiao Juan
Published: October 2014

A technique for determination of Ru in waste ruthenium catalysts using ICP-OES after sample digestion by high temperature fusion with NaOH-NaNO3mixture was described. Such experiment conditions were investigated as the influence of sample digestion methods, fusion time, fusion temperature, the dosage of NaOH-NaNO3mixture and interfering ions on the determination. Under the optimized conditions, the limits of detection (LODs) of Ru for tested solutions were 10 ng mL-1. The relative standard deviations (RSDs) for Ru were 2.01 (CRu= 1 mg L-1, n = 7). The linear ranges of calibration graphs for Ru were 0 ~ 100.00 mg L-1. The proposed method was applied to determine the practical samples with good recoveries and satisfactory results.
Liquid-Phase Catalytic Oxidation of Styrene by a Fiber-Supported Copper(II) Complex with High Catalytic Performance
Authors: Yang Hong Hong , Wang Ge , Yan Shan Shan , Feng Jing , Liu Zhen Dong , Wu Zheng
Published: October 2014

A new type of polymer-supported catalyst, [PS-(PBIM)2Cu (II)], was synthesized by loading 2-(2’-pyridyl) benzimidazole on chloromethylated propylene-styrene graft copolymer fiber and subsequent treatment with Cu (OAc)2 in methanol. The prepared catalyst was used in the oxidation of styrene with tert-butyl hydroperoxide (TBHP) as the oxidant. The important reaction conditions, such as the reaction temperature, the ratio of oxidant/styrene, and the recycle times were examined. The experimental results show that the catalyst reveals relatively high catalytic performance with 84% conversion for styrene. The suitable conditions are as follows: n (styrene):n (TBHP)=1:3, the reaction temperature of 80 °C and the reaction time of 8 h. In addition, the catalyst used repeatedly for 3 times can still possess high catalytic activity.
Determination of Fluoroquinolones Residual in Freshwater Fish by HPLC
Authors: Jin Yue , Zhang Wen Yu , Wang Qian , Yang Yi Qing , Liang Li Ya , Yan Shi Jie
Published: October 2014

HPLC (High Performance Liquid Chromatography) method for danofloxacin(DAN), enrofloxacin(ENR), sarafloxacin(SAR) and difloxacin(DIF) residues in freshwater fish was developed. The fish sample was extracted with methanol-water-acetic acid(2/8/0.01, V/V/V), performed on a C18 solid-phase extraction column. With methanol+malonic acid-magnesium chloride aqueous solution as mobile phase, gradient elution at 30°C, inject volume was 20μL. The wavelength of UV detector was 280 nm. The linear rang of four drugs was 0.1~10μg/mL. In the level of 0.5μg/kg and 4.0μg/kg, the average recovery of the four kinds of drugs was 79.81%~92.03% , the RSD was 1.03%~4.07%. The limit of DAN, ENR, SAR, and DIF was 0.1μg/kg, 0.1μg/kg, 0.05μg/kg, and 0.05μg/kg individual. This method was employed to analyze freshwater fishes, such as catfish, chub and carp, because of its simplicity and high efficiency.
Experimental Study and Modelling of Moisture Sorption Isotherms of Salted Largehead Hairtail (Trichiurus lepturus) at 25 and 35°C
Authors: Ren Zhong Yang , Wu Yan Yan , Duan Zhen Hua , Li Lai Hao , Yang Xian Qing
Published: October 2014

The moisture sorption characteristics of salted largehead hairtail (Trichiurus lepturus) were investigated within the limits of water activity (0.11-0.98) at 25 and 35°C using a self-made instrument for the measurement of the equilibrium moisture content according to the static gravimetric method. The shape of the sorption isotherms was sigmoidal. The moisture sorption isotherms exhibited significant hysteresis. The hysteresis of salted fish may be due to the salt permeating into the body of the fish as a result of desorption and adsorption processes. Seventeen mathematical models were fit to the experimental data for the equilibrium moisture content at different water activity levels. The Ferro-Fontan equation provided the best fit for the experimental data of the equilibrium moisture content among the 17 models assessed for the sorption isotherms at 25 and 35°C. The net isosteric heats of sorption decreased gradually with increases in moisture content. The isosteric heats of sorption ranged from 44.59 kJ/mol to 45.61 kJ/mol between the moisture contents of 22.22% and 43.25% for salted largehead hairtail.
Studies on Synthesis and Properties of Hydrophobic Brønsted Acidic Ionic Liquid
Authors: Ding Li Bing , Li Han Sheng , Chu Tong Hua , Wu Qin , Zhao Yun , Jiao Qing Ze
Published: October 2014

A hydrophobic Brønsted acidic ionic liquid 1-octyl-3-(butyl-4-sulfonate) imidazolium hydrogen sulfate ([BsImR8][HSO4]) was synthesized and characterized by fourier transform infrared (FT-IR), nuclear magnetic resonance (NMR), electron spray ionization mass spectrometry (ESI-MS) and thermogravimetry (TG). [BsImR8][HSO4] was used as an efficient catalyst for esterification of oleic acid with methanol to biodiesel. It was founded that [BsImR8][HSO4] exhibited high catalytic activity, which is near to that of H2SO4.It was ascribed to its strong Brønsted acidity. The catalyst could maintain high activity after five cycles of use.
Nutritional Characteristics of Silkworm Pupae Protein En Peptides after Simulated Gastric and Simulated Intestinal Digestion In Vitro
Authors: Chen Jia Jie , Wu Wen Hui , Ni Ling , Yan Ting , Zhao Qing Bo , Bao Bin
Published: October 2014

This study evaluated the nutritional characteristics and percentage of released nitrogen (%) of silkworm pupae proteins and peptides after simulated gastric and intestinal digestion, with a view to use in animal feeds or human nutritional support. Distribution of molecular mass and amino acids in the processed protein were analysed and the amino acid score, chemical score, and essential amino acid index (EAAI) calculated. Differential scanning calorimetry and simulated in vitro gastrointestinal digestion were used to analyse the denaturation temperature and absorption characteristics of samples. The denaturation temperatures suggested that silkworm pupae proteins and peptides were stable at room temperature. Silkworm pupae proteins and peptides contained all amino acids required by humans, and the composition was reasonable. Simulated gastrointestinal digestion resulted in about 90% nitrogen release amount. All data indicate that this protein may be useful as an economic, high quality supplement in animal feeds and for human nutritional support.
Production of Structured Triacylglycerols from Perilla Seed Oil and Tripalmitin Catalyzed by Lipozyme RM IM
Authors: Wang Xu Dong , Liu Xi , Zhao Xing Yu , Zhu Wei Jie , Wang Jun
Published: October 2014

Unsaturated free fatty acids (UFFAs), which are rich inα-linolenic and omega-3 fatty acids, were obtained by alkali hydrolysis and urea complexation methods from perilla seed oil and used as the acyl donor to produce structured triacylglycerols (STAGs) catalyzed by Lipozyme RM IM. The results indicated that the content ofα-linolenic acid was increased to 73.16 % after urea complexation methods. The highest incorporation rate ofα-linolenic acid was 58.78 %, which were achieved under the optimum conditions: a molar mass ratio of tripalmitin to UFFAs of 1:12, a reaction time of 48 h and a temperature of 60 °C.
Effects of Temperature on Galvanic Corrosion Behaviors of Super 13Cr and P110 Steel Couples in NaCl Solution
Authors: Yao Xiao Fei , Tian Wei , Wu Ling
Published: October 2014

Electrochemical methods were employed to investigate galvanic corrosion behaviors of super13Cr and P110 couples in NaCl solution at different temperature. Corrosion morphologies and products of the couples were analyzed by SEM, EDS and XRD. The results showed that there were potential difference distinctly between super 13Cr and P110 steel in NaCl solution at different temperature, when its contacted, galvanic corrosion of super 13Cr-P110 steel couples will occurred. P110 was accelerated to corrode as anode and super 13Cr was protected as cathode in the coupling. Super 13Cr-P110 steel couples could not be used as P110 without any protection in NaCl solution at 20 °C to 80 °C. Corrosion current density and galvanic corrosion of super13Cr-P110 steel couples increased with increasing temperature in NaCl solution, of which corrosion products are Fe3O4.
Influence of Heat Input on Grain Size in the Structure of 316LN Stainless Steel Welded Joints
Authors: Li Li Chan , Liang Can , Wang Dong Dong , Li Yong Quan , Duan Quan
Published: October 2014

316LN stainless steel is a material with excellent mechanical properties, good resistance to intergranular corrosion and good weldability, and it has been used in many fields of industry. Welding quality has great influence on the strength and corrosion resistance of weldment. In this study, one group of submerged arc welding and three groups of shielded metal arc welding were taken to study the influence of heat input on grain size in the structure of 316LN welded joints. The results show that the microstructures of the weld zones in experiment were all consist of austenite and a small amount of banding or dendritic δ-ferrite and the amount of ferrite decrease with the increase of heat input. It also can be concluded from the experiment that with the increase of welding heat input the grain size of overheated zone decrease.
Study on the Properties and Mechanism of Flame Retarded Glass Fiber Reinforced Polyamide 6 with Microcapsulated Aluminum Hypophosphite
Authors: Tang Hai Shan , Tan Yi Lun , Wang Ning Ping , Xia Lang Ping , Zhu Jie , Peng Zhi Han
Published: October 2014

Aluminum hypophosphite can be used to flame retard glass fiber reinforced polyamide 6 (GFPA6). TGIC microcapsulated AlHP (T-AlHP) and epoxy resin microcapsulated AlHP (E-AlHP) were made and put into GFPA6. The vertical burning tests and mechanical tests were taken to study the flame retardant performance and mechanical properties of the corresponding composites. Addition of either T-AlHP or E-AlHP resulted in an increased UL-94 rating and a decreased comprehensive mechanical performance. T-AlHP endowed GFPA6 a better flame retardancy than E-AlHP did. TG showed the decomposition behaviors of T-AlHP, E-AlHP, and the corresponding composites. From Py-GC/MS, the detailed pyrolysis products of flame retardants and the flame-retardant composites were identified. Finally, the properties and mechanism of flame retarded GFPA6 with these two kinds of microcapsulated Aluminum Phosphate were summarized.
Tensile Mechanical Properties of Three-Strand PE/SiO2 Composite Fiber Rope
Authors: Shi Jian Gao , Yu Wen Wen , Zhong Wen Zhu , Liu Yong Li , Min Ming Hua , Wang Lei
Published: October 2014

The tensile mechanical properties of polyethylene/silica (PE/SiO2) composite fiber and three-strand PE/SiO2composite fiber ropes were investigated. It was found that the SiO2content had a significant effect on the tensile mechanical properties of composite fiber. The breaking force of the fishing three-strand PE/SiO2composite fiber rope with diameter 8 mm was 15.8 kN. Compared to common synthetic fiber rope with the same diameter, fishing three-strand PE/SiO2composite fiber rope had higher breaking force and less elongation. On the premise of maintain the breaking force, the common synthetic fiber rope could be replaced by the fishing three-strand PE/SiO2composite fiber rope in fishing area, and the linear density, the elongation at break, the netting gear resistance and using diameter of rope decreased. Therefore, an efficient method to improve the tensile mechanical properties and lower cost by using composite fiber rope was established.
Study on Thermal Degradation Behavior of Composites with Liquid Crystalline Thermoset
Authors: Moon Hee Jung , Cho Seung Hyun
Published: October 2014

Liquid crystalline thermosetting epoxy, 4,4’-Diglycidyloxy-α-methylstilbene (DOMS) was synthesized and characterized with cross-polarized optical microscopy (POM) and differential scanning calorimetry (DSC). Alumina reinforced DOMS composites were fabricated by melt blending with sulfanilamide (SAA) as a curing agent. To investigate thermal degradation behavior, thermogravimetric analysis (TGA) was performed under nitrogen atmosphere at the temperature range from 30 to 1000°C. Activation energies for decomposition (Ed) by TGA were determined as a function of conversion by weight loss process.
A Method for Prediction of Water Permeability through Polymers
Authors: Askadskii Andrey , Afans’ev Egor , Matseevich Tatyana , Popova Marina , Kondrashchenko Valerii , Qi Shi Cheng
Published: October 2014

A calculation method for prediction of water permeability through polymers is suggested. An appropriate equation for calculating the activation free energy of permeability is proposed. The method is based on a set of atomic constants associated with the polymer-water interaction energy. The chemical structure of polymers as well as the degree of crystallininty, temperature, and free volume are taken into account. The method is also applicable for polymeric nanocomposites.
The Application of Polyurethane Material Structure in the Greenhouse
Authors: Yang Xiao Feng , Liang Hua Yang , Ummin Okumura , Yang Mu
Published: October 2014

The application of new polymer materials in modern agriculture is considered and discussed in a completely new view in this paper. Combined with modern agricultural characteristics: out of season and large-scale planting, the excellent characteristics of modern polymeric materials are skillfully applied to modern agriculture greenhouse rack, which solves many defects of the traditional greenhouse frame structure material. This paper takes Hainan Province as the area of greenhouse structure research and analyze the shed load in the view of structural analysis, based on which the finite element software ABAQUS for the greenhouse framework structure are analyzed by finite element analysis. The results show that the stress and deformation results can satisfy the requirements of structural strength in the normal load conditions.
Study on Melamine Formaldehyde Resin Foam Modification Technique
Authors: Hou Shao Kun , Wang Jian Ming , Yu Fan Qin
Published: October 2014

This passage studied the synthetic process of melamine formaldehyde resin foam, analyzed the addition time of modifier of PVA, reaction temperature, PVA quantification and different degree of polymerization PVA. The results of experiments showed that it was better to add the PVA at 50min after the heating start. The temperature was 90-95°C. It showed that there was an obvious distinction of the foam with different degree of polymerization PVA. Decomposition temperature of the foam was 300°C and the residual of mass was about 80%.
Preparation of Core-Shell Particles Consisted of Polysiloxane and Styrene-Butyl Methacrylate by High Internal Phase Emulsion
Authors: Jia Shao Jin , Zhang Zhen Qi , Ding Zhen Gang , Hou Xiao Tian , Jiang Ping Kai
Published: October 2014

A core-shell composite polymer was produced by the method of high internal phase emulsion polymerization. The continuous phase of emulsion contained styrene(St), butyl methacrylate(BMA), octamethylcylotetrasiloxane(D4), and azobisisobutyronitrile (AIBN) which worked as an initiator. The block copolymers with St, BMA, D4 units are particularly promising for surface modification and hydrophobicity. The core-shell structure is proved by the use of Transmission electron microscopy (TEM). In addition, the water contact angle increased with the increasing weight ratio of D4. The results show that the concentrated emulsion system has good stability and the water resistance of the polymer has been improved greatly.
Structure and Properties of Double-Filament Tri-Component Combined Yarn
Authors: Gao Yi Qiang
Published: October 2014

Manufacturing process of combined yarn with different filament size and cotton roving has been discussed. It shows that filament feeding point has some effect on combined yarn structure and yarn properties. If the filaments are fed from different sides of the cotton strand, they usually wrap the strand in parallel. If the filaments are fed from the same side of the strand, they wrap the strand crossed more often. Filament feeding point has an effect on yarn hairiness while it affects yarn breaking strength, yarn breaking elongation and abrasion resistance slightly. Yarn property weight is determined by subjective empowerment and Borda method is used to analyze yarn property. It has proved that if the filaments are fed from different sides of the cotton strand, the filament-roving space is set at 4mm respectively; the combined yarn shows the best.
Development of Flame Retardant and Antistatic Fabric
Authors: Li Xiang Hong , Zhang Jun Ying , Ma Jun
Published: October 2014

Polysulfonamide Aramid 1313 blended siro-spun yarns and silver-coated filament are used to weave flame retardant and antistatic fabrics. The effect of fabric weave and silver-coated filament content on flame retardant property and antistatic property was discussed. Two-factor analysis of variance shows that fabric weave and filament content have little effect on fabric flame retardant property, while they affect fabric antistatic property considerably. Fitting curve of antistatic property and filament content relationship was also established.
The Effect of Fiber on EPDM Inhibitor Material
Authors: Chen Guo Hui , Tian Jun , Liu Chen , Li Dong , Lu Xiang Hui
Published: October 2014

In this paper, we studied the different content of aramid fiber, aramid pulp, carbon fiber, high silica fiber, mullite fiber, alumina fiber's effect on EPDM inhibitor material. The result show that aramid fiber can significantly improve the ablation resistance of thermal insulation layer, when the content of aramid fiber up to 6.7%,the inhibitor material's ablating rate get the minimum value 0.04mm/s. Aramid pulp can improve ablation resistance of thermal insulation layer, but its dispersion in insulation material is difficult. Others inorganic fiber can't lower the ablating rate as much as aramid fiber, it mainly because of the brittleness of inorganic fiber, during the dispersion process, most of fiber had been triturated, so those fiber can't decrease the liner ablation rate of the inhibitor.
Numerical Analysis for Multi-Point Forming of Aluminum Alloy Profile
Authors: Liu Xue Zhi , Liu Chun Guo , Yao Yuan , Zhang Xue Guang
Published: October 2014

As a new technique to form sheet metal parts, Multi-point forming (MPF) also can be used on bending aluminum alloy profile. Since the Multi-Point Die (MPD) which replaces the traditional solid bending die is composed of many discrete punch elements, dimples always occur on the plate of profiles. To eliminate the dimpling defects, numerical simulation of the bending process with A6N01S-T5 aluminum alloy hollow profile using MPD were conducted. By comparing the bending effects on MPD with different size of punch elements and with different kind of elastic cushion, reasonable forming parameters were obtained. Pressing of Aluminum alloy profile with different radii on the MPD and solid die were simulated. The cross-section distortion indicated that the aluminum alloy profile can be formed with MPF technique while it has the advantage of flexibility. For the profile with large deformation, multi-step MPF method is a better choice due to its rapid reconfigurable characteristic.
Research of Mechanical Behavior for Rounded and Rectangular Clinched Joint
Authors: Zhao Lun , He Xiao Cong , Lu Yi
Published: October 2014

Joining process and mechanical properties of clinched joints in Al5052 aluminum alloy sheets had been studied in this study. The clinched joints were classified to round one and rectangle one. Results of cross-section showed that the minimum thickness of the rectangle joints were lower than the round joints, and the aspect ratio of undercut section corresponding was larger. The strength of rectangular joint was 1.7 times of round one. Failure mode of rounded joint was the upper sheet fractures at the neck having a minimum thickness, but failure mode was the mix of neck-fracture and pulled-out for rectangular joint.
Synthesis of Ethylene-Propylene Copolymer and their Structures
Authors: Dang Yan Liu , Zhao Yun , Wang Chao Xiang , Jiao Qing Ze , Li Han Sheng , Wu Qin
Published: October 2014

This work reports copolymerization of ethylene-propylene (EP) using a novel phenoxy–ester ligated titanium catalyst. Copolymerization reactions were conducted in toluene at 70 °C with varied E/P flow ratios. Fourier transform infrared spectroscopy, X-ray diffractometer, nuclear magnetic resonance spectroscopy and differential scanning calorimetry analysis were performed to characterize the structures, compositions and glass transition temperatures of the copolymers. The results show that ethylene-propylene copolymers are random polymers and the link ratios of ethylene to propylene are between 0.89 and 1.26. The glass transition temperature of ethylene-propylene copolymer is-43.3 °C.
The Mix Design Method and Performance for C60 Concrete Poles with High Strength, Impermeability and Frost Resistance
Authors: Xing Hai Jun , Hou Xin Tuo , Zhu Bin Rong , Zhang Zi Fu , Li Zhen Fu
Published: October 2014

In corrosive soils areasand extremely cold regions,high performance is required inthe impermeability and frost resistanceof concrete poles. In this paper, the mix design of C60 high performance concrete and the relationship between mix parameters and performance is studied and analyzed ,and the influence of the water-cement ratio, the amount of cementation materials, the mineral admixtures and other factors on High Performance Concrete is discussed, as well as the impact of different admixtures for concrete. According to the analysis results, the concrete mix is designed and used in practice.
The Performance about Multi-Component Blended-Spun-Yarn Fabric Based on Superfine Profiled Acrylic
Authors: Wu Hua , Zhang Hong Xia , Shen Hong Wei , Xu Jian Feng , Jiang Ya Fen , Zhang San Xing , Zhu Cheng Yan
Published: October 2014

The raw materials of blended yarns are Dralon superfine profiled acrylic, spun silk, Modal and cotton. Considering the different components and proportion, 6 kinds of woven fabrics were designed to test, then put to test and analysis the date of the heat retention, hygroscopicity, permeability, wrinkle resistance and drape performance. The results showed that,40S/1 acrylic / Modal (65/35) blended yarn can improve the warm of blended-spun-yarn fabric,40S/1 spun silk / acrylic / Modal (30/40/30) blended has a good quality of wrinkle resistance and permeability.40S/1 spun silk/ acrylic / cotton (20/50/30) blended can improve the drape performance and hygroscopicity of multi-component blended-spun-yarn fabric.
Microstructure Evolution in Magnesium Alloy ZK60 during Cyclic Extrusion and Compression
Authors: Han Fei , Liu Hong Wei , Chen Gang
Published: October 2014

The microstructural evolution of of as-cast ZK60 magnesium alloy processed by cyclic extrusion and compression (CEC) were studied, and the effects of technical parameters on microstructural evolution were investigated. The results show that the grains of as-cast ZK60 magnesium alloy were obviously refined and uniformed by CEC, the average grain size was decreased from original 50 ~ 60 μm to about 2 μm when the extrusion ratio was 8 with 8-passes at 350°C, and the refinement effect was increased with the rising of extrusion ratio and passes. The effect of increasing passes on grain refinement was not obvious when it exceeds 8. Nevertheless, it is beneficial for the grain homogenization.
Transformation between Antase and Rutile Titania-Mica Pearlescent Pigment by MnO2 Induced Process
Authors: Liu Yue Long , Liu Jia
Published: October 2014

A chemical inducing process was developed to prepare titania-mica pearlescent pigment. MnO2 was used as crystal inducing promoters, a transformation between antase and rutile titania-mica pearlescent pigment was found by calcining at 800°C for 0.5 h. The mass ratio of mica to MnO2, pH value, temperature and dripping rate of MnO2solution and TiOSO4was studied. The crystalline form of titania-mica pearlescent pigment was measured by XRD.
Continuous Cooling Transformation Behavior and the Phase Transformation Model in Low Carbon High Strength Sheet Steel
Authors: Pei Yu , Gao Zhe , Liu Yi , Zhao Shi Qian , Xu Chang Yu , Ren Li Yong , Li Xing Liang
Published: October 2014

Phase transformation of austenite continuous cooling process in low carbon high strength sheet steel has been researched by DIL805 thermal mechanical simulate. The Austenite continuous cooling transformation (CCT) diagram of steel has been determined by dilatometry and metallography. With the increase of cooling rate, ferritic transformation, perlitic transformation, bainite transformation and martensitic transformation have produced in the organization. Mathematical equations of phase transformation point-cooling rate and phase variable-cooling rate have been established and phase transformation model of high fit degree has been gained by regression calculation. The results show that calculated value and experimental value are nearly similar, so the phase transformation model is feasible.
Effect of Heat Treatment on Microstructure and Properties of Casting Al-5.5Fe-4Cu-2Zn-0.4Mg-0.5Mn Alloy
Authors: Li Run Xia , Li Qing , Tong Yan Jiao , Luan Xin Ying , Liu Zhe , Yuan Xiao Guang
Published: October 2014

The effect of heat treatment process on the microstructure and properties of casting Al-5.5Fe-4Cu-2Zn-0.4Mg-0.5Mn alloy were studied. It has been founded that, the mechanicals properties of casting Al-5.5Fe-4Cu-2Zn-0.4Mg-0.5Mn alloy improved significantly after solid solution and aging treated (T6), the tensile strength increased from 173.4MPa to 218.7 MPa. However the mechanical properties of the alloy after aging treated (T1) get less enhanced and the tensile strength only achieved 194.07MPa. The SEM and TEM analysis shows that solid solution treatment plays a role of dissolving the second phases in casting Al-5.5Fe-4Cu-2Zn-0.4Mg-0.5Mn alloy. After solution treatment the alloy was proceed with low-temperature ageing treatment, a large number of dispersively tiny phases precipitated in the matrix of the alloy, which exhibits strengthening action.
Effect of Y on Microstructure and Mechanical Properties of Mg-6Al-1Zn-1.8Gd Magnesium Alloy
Authors: Chen Xiao Ya , Li Quan An , Zhang Qing , Chen Jun , Jiang Hui Zhen
Published: October 2014

The microstructure and mechanical properties of Mg-6Al-1Zn-0.9Y-1.8Gd alloy have been studied by micro-analysis and tensile tests. The results showed that the alloy mainly consists of Mg matrix, Al2Y, Mg17Al12and Al2Gd. The best tensile strength of the alloy was 255 Mpa at room temperature, and the alloy still had the very high mechanical property at high temperature.
Study on Microstructure and Composition of Nanocrystalline Fe-Based Soft Magnetic Material
Authors: Qian Kun Ming , Hao Jie , Ji Song , Zhang Yan Song , Ding Ang , Huang Jing Hui , Qian Chun Yang , Zhang Zu Jun
Published: October 2014

The composition and microstructure of nanocrystalline soft magnetic materials with different components were analyzed and calculated in detail by using the method of micro-structural analysis and thermal magnetic analysis. The results show that the micro-structural parameters of the nanocrystalline soft magnetic materials are closely related to their chemical composition. The internal mechanism of the chemical composition affecting on the micro-structural parameters were explained by the crystallization process of amorphous materials and the phase transition kinetics, respectively.
Preparation of CdO Nanowires from CdO2 Nanoparticles
Authors: Li Jing , Chen Yan , Zhang Yong Cai , Duan Jin Gui
Published: October 2014

A two-step method was developed for the preparation of CdO nanowires from CdO2 nanoparticles, that is, first, Cd(OH)2 nanowires were synthesized via solvothermal treatment of CdO2 nanoparticles in the mixed solution of deionized water and toluene at 180 °C for 24 h; second, CdO nanowires were obtained by thermolysis of the Cd(OH)2 nanowires in air at 300 °C for 3 h. The obtained products were characterized by powder X-ray diffraction and transmission electron microscopy.
Study on Bamboo Particleboard Bambooceramics - PF Resin Content Influence on Properties of Bambooceramics
Authors: Du Chun Gui , Li Ren
Published: October 2014

This paper presents a study on the different PF resin content influence on properties of bamboo particleboard bambooceramics by precise shaving bamboo particles as raw materials. The results showed: the size (length, width, thickness and volume ) shrinkage ratio of bambooceramics and density reduction ratio gradually decreased with the rising of PF resin content, and its carbon yield ratio and MOR gradually increased.
Structure and Properties of the GeAsS Glasses from Ab initio Calculations
Authors: Chen Li An
Published: October 2014

The structure and properties of the GexAsxS100-2x have been studied by ab initio molecular dynamics simulation. By calculating the pair distribution functions, bond angle distribution functions, we analyze the structure and properties of the alloys. Calculations show that Ge and As are all well combined with S atoms. When x is smaller than 25.0 the binding increases with x , when x is larger than 25.0 the binding decreases with increasing x . The intervention of As atom does not affect the GeS2 formation in Ge40As40S80
Electromagnetic Wave Absorption Cement Based on Composited Absorbing Agent
Authors: Sun Ye , Zhang Yue Fang , Hao Wan Jun
Published: October 2014

To solve more and more serious electromagnetic radiations, electromagnetic wave absorption cement were prepared by introducing carbon black and glass fiber as composited absorbing reagent, wich can be useful in building anechoic chamber and other electromagnetic radiation protection to buildings. The results showed that the absorption properties were improved compared with single absorbing agent such as carbon or glass fiber. the lowest reflection loss of-11.3dB was obtained at 18 GHz of 5wt.% carbon black and 9wt.% glass fiber filled cement with thickness of 20mm. The increase of thickness separately can not improve the absorption properties.
Facile Hydrothermal Synthesis of a Graphene–Bismuth Oxide Composite and its Photoresponse Performance
Authors: Yang Bao Cheng , Lv Xiao Wei , Li Zi Jiong , Zhang Jie Jie
Published: October 2014

Graphene-bismuth oxide composite were fabricated through a facile hydrothermal method. The SEM, XRD, EDS, FTIR were performed to characterize the morphology, composition, structure and surface functional groups. It was found that the Bi2O3 evenly spread on the surface of graphene. What is interesting is that two kinds of bismuth oxide can be generate in an experiment. One is spherical Bi2O3 with a diameter of 1~2 μm, the other is about 40 nm particle-size growed on the surface of the graphene. The possible growth mechanism was discussed. Under UV-pulsed illumination, graphene-Bi2O3 composite electrodes can produce an extracurrent of about 52.92 μA/cm2 under 0.3 V bias voltage, this value is higher than the existing report, indicating potential applications in optoelectronic devices. The possible reasons are explained.
Research on the Shaft-Frequency Electric Field Character of Ship’s Physical Scale Model
Authors: Liang Cheng Hao , Yao Jing Di , Huang Nai Bao , Wu Jian Hua
Published: October 2014

By signature gathering system, the shaft-frequency electric field of ship’s physical scale model is measured. At the same time, the mechanism of the corrosion related to shaft-frequency electric field is also described. Results show that the shaft-frequency electric field signature arises around a vessel and transmits in the surrounding seawater due to the current flow from impressed current cathodic protection (ICCP) system and the current flow resulting from the corrosion of dissimilar metals during propeller rotation, which contains both shaft fundamental and harmonics. The signature character of electric field is more and more marked with the shaft rotation speed increasing. The amplitude of electric shaft-frequency electric field by modulating the current of ICCP system is 10 times greater than that of corrosion current. It is proved that the using a 1:100 physical scale model of a vessel to study the shaft-frequency electric field character is an effective method and provided an new way.
Flame-Retardant Properties of Ethylene-Vinyl Acetate/Layered Double Hydroxides Composites
Authors: Jia Chui Xuan , Qian Yi , Chen Xi Lei
Published: October 2014

Mg-Al-Fe ternary layered double hydroxides (LDHs) were synthesized based on Red mud by a calcination-rehydration method, and characterized using X-ray diffraction (XRD). The flame-retardant properties of EVA/LDHs (EVA, ethylene-vinyl acetate) composites were studied via cone calorimeter test (CCT), smoke density test (SDT), and Thermogravimetric analysis (TGA). The CCTs data indicate that heat release rates (HRR) of EVA/LDHs composites decrease in comparison with that of EVA, EVA/Red mud, EVA/ATH and EVA/MH composites. The SDT results show that LDHs is helpful to smoke suppression. The TGA show that LDHs-containing EVA2 has higher thermal stability at high temperatures than the other samples.
Application of Functional Features to the Description of Technical Means Conception
Authors: Herbuś Krzysztof , Ociepka Piotr , Gwiazda Aleksander
Published: October 2014

The paper presents the method of describing the conception of a future technical mean basing on the method of functional features. In order to determine the attributes which should characterize the functional features for the description of the conception of a technical mean it has been analyzed the different stages of the design-constructional-manufacturing process. Basing on the review of literature it was supposed the structure of the design-constructional-manufacturing process which includes the following stages: the need determination, designing, constructing, manufacturing and exploitation. In the process of designing-constructing-manufacturing one can distinguish models associated with each of its stages, and namely: the model related to designing (a conception), the model related to constructing (a construction), the model related to planning, the model related to manufacturing. The most important from mentioned models, in the terms of description of the conception of a technical mean, is the model related to the designing sub-process. It was assumed that the model related to the designing sub-process should include such information as: the structure of the system of a future technical mean (system of conjugations and transformations relationships), the design solutions of components of a technical system associated with the transformations relations, the design solutions of connections between components of s technical system mapping the established conjugations relationships between elements.