bluuebunny/crossref_metadata_2025 huggingface dataset:
Isolation and Identification of Nitrite-Degrading Lactic Acid Bacteria from Salted Fish
Authors: Wu Yan Yan , Liu Fa Jia , Li Lai Hao , Yang Xian Qing , Deng Jian Chao , Chen Sheng Jun
Published: December 2011

Lactic acid bacteria commonly used in fermented meat products, dairy products and smoked products such as pickled food industry. They can make the products have a special flavor and color, inhibit the growth of pathogenic bacteria, and reduce the nitrite content of products, improve food security. 12 strains of lactic acid bacteria were isolated from the salted fish. Some of their biochemical characteristics were studied and compared, as well as their abilities on the tolerance and degradation of nitrite. 3 strains named b2、j2、j5 were approved to degrade nitrite quickly with good biochemical characteristics. After amplification and sequencing of 16S rDNA gene, the isolated strains were identified by sequence homology as Lactobacillus plantarum, Leuconostoc mesenteroides and Pediococcus pentosaceus. Strainb2, j2 and j5could degrade 96.2%, 85.6%, 91.2%.
Measure Scheme According to Siemens PLC
Authors: Yang Zhi Fang , Qing Shan , Yao Gang , Wang Hua , Shi Zhe , He Ping
Published: December 2011

Using the Siemens PLC programmable controller, a new weighing and control integration plan was discussed, and the debugging points was analyzed according to the engineering experience, and the principle part and program details were presented.
Optimization of Culture Conditions for Improving the Biomass of Agaricus brunnescens
Authors: Wang Yu , Ban Li Tong , Li Zheng , Wu Jia Xin
Published: December 2011

Agaricus brunnescens is a producer for novel biomaterial (exopolysaccharide ofAgaricus brunnescens). In this paper, the optimization of culture conditions for the biomass ofAgaricus brunnescensthrough orthogonal methods was reported. The optimal conditions for enhancing production was: inoculum size 10 %, broth volume 100 mL in a 250 mL flask, pH 6.0. This optimization strategy in shake flask culture lead to an biomass 0.8 g/L, which was considerably higher than that obtained in preliminary studied.
Recognition Patterns Construction of Coronary Heart Disease Patients with Qi Deficiency Syndrome Based on Artificial Neural Network
Authors: Shi Qi , Zhao Hui Hui , Chen Jian Xin , Yang Yi , Zheng Cheng Long , Wang Wei
Published: December 2011

Coronary heart disease (CHD), called “thoracic obstruction” in TCM, is one of the most important types of heart disease for its high incidence and mortality. The methods of syndrome studies in TCM can not be completely in accordance with these of modern medicine because of the complexity itself. In this paper, we investigated the ability of Artificial Neural Networks (ANNs) to predict CHD patients with or without qi deficiency syndrome. Predictions with Multilayer Perceptron Neural Network (MPLNN, one type of the ANNS), we obtained recognition patterns made up of eight biological parameters. The accuracy of this recognition pattern was 82.2%, and the accuracy of validation pattern was 80.0%.
Fabrication of Rice Husk Ash/Natural Rubber Composite
Authors: Zeng Zong Qiang , Yu He Ping , Liu Hong Chao , Liao Shuang Quan , Peng Zheng
Published: December 2011

The preparation of rubber-based composite from agricultural by-product is the main trend to upgrade the performance of rubber and reduce the cost. In this work, the rice husk ash/natural rubber (RHA/NR) composites were prepared by latex mixing process using the RHA modified with rare earth coupling agent. The mechanical properties, dynamic mechanical properties, thermal stability and morphology of RHA/NR composites were analyzed by universal testing machine, dynamic mechanical analyzer, thermo gravimetric analyzer and scanning electron microscope. The results indicate that previous modification of RHA with rare earth coupling agent can improve the dispersion of RHA in NR matrix significantly and increase the interaction between RHA particles and NR matrix and thus upgrade the mechanical properties and anti-oxidative behaviors of RHA/NR composite. The RHA/NR composite of highest mechanical properties and anti-oxidative behaviors can be obtained with a RHA loading of 4 per hundred rubber.
Research of a New Model to Optimize Resource Allocation
Authors: Li Shu Jing , Ma Hui
Published: December 2011

In construction project, it is important for managers to optimize resource allocation. It leads to get the optimum time and control cost. In this paper, we get a new approach to optimize resource allocation through analyze the time-cost curve and PERT technique. It is easy to use this method even if the information is limited.
Research on Resistance of Aphis Glycines in Hei Longjiang Province
Authors: Wang Qian , Xu Wei Jun , Yan Shan Chun , Wang Chun
Published: December 2011

Aphis glycines were collected in primary grain crop production region of Hei long jiang province in 2010.The resistance of Aphis glycines to ten commonly used insecticides was tested by immension method.The LC50 and relative toxicity ratio of Aphis glycines were gotten. it could be used as a reference for resistance monitoring or other related researches. The results showed that Aphis glycines had light resistance to organophosphorus pesticide, and it was sensitive to avermectins and cypermethrin.
Solvothermal Synthesis and Magnetic Properties of Fe3O4 Microspheres
Authors: Sun De Hui , Zhang Ji Lin , Sun De Xin
Published: December 2011

We synthesized Fe3O4 microspheres using a solvothermal method and characterized their morphologies, structures, surface property and magnetism by field emission scanning electron microscopy (FE-SEM), powder X-ray diffraction (XRD) patterns, Fourier transform infrared (FTIR) absorption spectra, and vibrating sample magnetometer (VSM). The results showed that the synthesized Fe3O4 microspheres with a tunable size range of ca. 80–200 nm are composed of many Fe3O4 collective nanoparticles. XRD pattern confirmed that the Fe3O4 microspheres belong to cubic structure. Magnetic investigation reveals that the Fe3O4 microspheres have higher saturation magnetization and negligible coercivity at room temperature.
Study on Gastric Juice Secretion by Electroacupuncture at Zusanli Point on Rabbits under Action of Cimetidine
Authors: Peng Yong , Li Jian
Published: December 2011

The effect and mechanism on gastric juice secretion by electroacupuncturing at Zusanli points on rabbits with modern apparatuses were studied. Zusanli points were stimulated with electroacupunctures to observe the flux of gastric juice in the study. Before and after Cimetidine being injected by the pathway of points, Zusanli points were respectively stimulated with electroacupunctures to observe the flux of gastric juice secretion. The results showed that the flux of gastric juice slowered (P0.05) when the stopping acupuncture group for 10 minutes compared with the during acupuncturing group, but after Cimetidine being injected, the flux of gastric juice secretion did not increase obviously (P>0.05) during acupuncturing for 10 minutes compared with the no acupuncturing group, and also did not increase (P>0.05) stopping acupuncture for 10 minutes compared with no acupuncture. So the study showed that the flux of gastric juice secretion could be increased by electroacupuncturing at Zusanli points, and the mechanism may be come true by the gastric H2 receptor pathway.
Study on Reproduction of Color Information of Print Media Based on Chromaticity Measurement
Authors: Chen Wen Ge , Wang Wei Li
Published: December 2011

This article is to study, under the same conditions, the color reproduction which were used coated paper, matte paper and special paper separately, with Bangte ink or Daiichi ink, printed by Mitsubishi printing machine. Then the Lab values of the three sheets of blank paper and the four-color color were measured by spectrophotometric densitometer,and analysed by Excel, meanwhile, drawing the colors maps and the chromatic aberration maps. Base on the data and maps, illustrate the three types of paper and two kinds of ink coloration and chromatic aberration, and come to conclusion to control the stability of ink and paper, improve the standardization and accuracy, decrease the error.
Study on Temperature Field of L-Phenylalanine Fermentation in Heat Pipe Bioreactor
Authors: Xu Shu
Published: December 2011

L-phenylalanine fermentation (L-Phe) is produced by the preparation method of PPA-transamination using the ferment liquor, which is the production of the E.coli No.1 fermented in heat pipe bioreactor (HPBR), the technical indexes are superior. The temperature profile of ferment liquor in the period of microbe growth is well distributed, the mean difference in temperature is 0.08°C, while the maximum value is 0.4°C.Base on operational principle of heat pipe, HPBR solves many problems on heat transfer in traditional bioreactor: nonuniformity of temperature profile, inefficiency of heat transfer etc. The study in-depth on transfer process in HPBR will effectively accelerate exploitation for new-style bioreactor and advancement of biotechnology.
The Pinch Design Method for Heat Exchanger Networks Considering the Heat Capacity Flowrate of a Stream with Variation in Temperature
Authors: Zhang Fei Long , Yu Shu Rong , Shen Ling
Published: December 2011

A novel method of locating the pinch is presented for the design of heat exchanger networks. The method is based on the pinch design method for heat exchanger networks which was first introduced by Linnhoff. The method first consider the heat capacity flowrate of a stream with variation in temperature. This is because heat capacity flowrate of a stream with variation in temperature not only affect minimum utility requirement for heat exchanger network but also affect the pinch location, choice ofΔTmin.
To Eliminate Vibration's Hazard of Chemical Enterprises Production Equipments by Absorber
Authors: Guo Xiao Yu , Xiang Zhao Hui , Zhang Jun , Zhang Shu Han
Published: December 2011

Abstract: Unwanted vibration produced by production process of chemical enterprises is controlled by the vibration absorber. This design is low-cost, easy installation and monitoring. The control algorithm builds a dynamic absorber model to analyze attributes of damping characteristics, and completes detailed experimental work in simulated factory environment. The investigation results demonstrate the good performance of absorber, and experiment results are able to prove the theory.
Preparation of CuO/γ-Al2O3 Catalysts by Impregnationin Supercritical CO2
Authors: Li Li Min , Xu San Kui , Wang Xiao Dong , Guo Nan Nan , Su Yun Lai , Zhang Peng
Published: December 2011

CuO/γ-Al2O3 catalysts were prepared by supercritical CO2 (SC-CO2) impregnation method. The preparation was carried out in SC-CO2 with Cu(NO3)2 as precursor, methanol as assistant solvent, and γ-Al2O3 as support. The effects of impregnation parameters such as temperature and pressure of SC-CO2, impregnation time, ratio of precursor to support, and amount of assistant solvent on catalyst preparation were investigated. The as-prepared catalysts were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis and compared to that prepared by the conventional impregnation method. The SC-CO2 impregnation method provided higher adsorption rate, larger adsorption quantity, more homogeneous dispersion of precursor, and stronger interaction between precursor and support. The catalytic degradation of methylene blue (MB) was used as probe reaction to estimate the catalytic activity of two catalysts prepared by two methods. The catalyst prepared by SC-CO2 impregnation method exhibits significantly improved catalytic activity. These results show that the inorganic metallic reagents as precursor with assistant solvent can be used as an alternative for the organometallic precursors in SC-CO2 impregnation method.
Chemical Constituents from Euphorbia helioscopia
Authors: Geng Di , Weng Lian Jin , Han Yuan Yuan , Yang Xin
Published: December 2011

AIM: To study the chemical constituents of Euphorbia helioscopia. METHODS: Compounds 1-10 were isolated and purified by silica gel, Sephadex LH-20 and Rp-18 chromatogarphy. Their structures were elucidated mainly by spectroscopic methods. RESULTS: Ten known compounds, helioscopinolide A(1), helioscopinolide B(2), scopoletin(3), scoparone(4), isoscopoletin(5), licochalone A(6), quercelin(7), 7, 4’-dihydroxy-5-methoxy flacanone(8), 2’, 4’-dihydroxy-6’-methoxydihydrochalcone(9) and pinocembrin(10), were isolated and structurally elucidated. CONCLUSION: Compound 3-5 and 8-10 were isolated from this plant for the first time. 2D NMR spectrum data of 2 were also reported in this paper.
Optimization of Simultaneous Distillation Extraction of the Black Pepper
Authors: Chen Wen Xue , Wang Fang , Hu Yue Ying , Li Cong Fa
Published: December 2011

The aim of this work was to optimize a simultaneous distillation-extraction (SDE) procedure for the volatile compounds of black pepper (Piper Nigrum L.). Several variables that could potentially affect the extraction efficiency, namely, the liquid: solid ratio (volume per mass), soaking time and simultaneous distillation-extraction time have been optimized by means of response surface methodology (RSM). The optimum technology conditions have been attained by RSM as follows: the ratio of liquid to solid 25:1, simultaneous distillation-extraction time 3h and the soaking time 1.5h, under the optimum operating conditions, the extraction yield was 1.458%.
Changes in the Antioxidant Activity of Purple Sweet Potato Wine during Storage
Authors: Fu Wei Na , Li Tuo Ping , Jia You Feng , Zhao Zhong Sheng , Hou Wei , Chen Ying
Published: December 2011

Anthocyanins, which possess strong antioxidant activities, are abundant in purple sweet potato wine. In the present study, changes in the antioxidant activity of purple sweet potato wine during storage were investigated. The results showed that purple sweet potato wine had high 2,2-dipheny-l-picrylhydrazyl (DPPH) free-radical and superoxide-radical scavenging activities, which were stable during storage periods. Compared with these two scavenging activities, the hydroxyl-radical scavenging activity of purple sweet potato wine was concentration-dependent and only presented relatively obvious scavenging activity at high concentrations. This hydroxyl-radical scavenging activity was also stabile during storage periods. The results are valuable in purple sweet potato wine research and development.
Effects of Polyacrylamide Mixtures with Different MolecularWeights on Sedimentation of Red Mud
Authors: Du Hui Xiang , Sun Yan Lin , Wang Hong , Huang Yun Hua
Published: December 2011

This paper introduced a method to subside red mud slurry using a kind of mixed polyacrylamide (PAM) solutions which composed two different molecular weights (19×106 and 0.8×106). The mixing ratio and feeding method of the different PAMs were investigated. The results show that the sedimentation rate can be obviously increased when using polyacrylamide mixtures. The optimum PAM mixing ratio (19×106/0.8×106, v/v) is 8:2, and feeding them by adding the mixed PAM solution prepared in advance. In this way, the supernatant liquid height can be increased by 5% compared with that of using PAM of 0.8×106 alone, the settling time can be shortened by 31.9% compared with that of using PAM of 19×106 alone.
Diagnosis Value of Detection K-Ras Gene Mutations in Patients with Gastric Cancer
Authors: Zhang Ai Mei , Wang Rong , Sun Kun , Jia Zheng Ping , Xie Hua
Published: December 2011

Mutations of K-ras gene have been proven to play important roles in human tumor progression. Point mutations of K-ras gene located in codons 61 are gene hot spot mutation regions in patients with gastric cancer. A simple and effective capillary electrophoresis (CE) method for point mutation detection in codon 61 of K-ras gene was established. The polymerase chain reaction (PCR) fragments included codon 61 of K-ras gene were analyzed by single-strand conformation polymorphism (SSCP)-CE method. The CE analysis was performed by using a 1×Tris–borate–EDTA (TBE) buffer containing 3.0% (w/v) poly (ethylene oxide) (PEO) (MW 300 000) under reverse polarity with 15 oC and voltage of 15 kV. Forty-two gastric cancer patients were analyzed using this developed method. K-ras gene mutation was found in 17 cases (40.5 %) and the results showed that K-ras gene mutation in gastric cancer tissue is a usual event, and the SSCP-CE was feasible for mutation detection of K-ras gene in populations. Detection of gene mutation of gastric cancer tissue by PCR - SSCP has a certain value to diagnosis of gastric cancer and to prevent gastric cancer associated with clinical and pathological features, living habits of different patients by detection mutation of K-ras gene codon 61.
Effect on Xylanase from Leveking in Bleaching Soda-AQ Pulp of Fast-Growing Poplar
Authors: Ji Xing Xiang , Chen Jia Chuan , Yang Gui Hua , Wang Jia Fu , Wang Lu Yan
Published: December 2011

The xylanase from Leveking was used in the experiment of bleached Soda-AQ pulp of fast-growing poplar. The suitable conditions of the xylanase from Leveking were obtained in the pretreatment of the Soda-AQ pulp of fast-growing poplar that temperature was 58°C, pH was 8.5, time was 120min and the dosage of the xylanase was 8IU/g. The pulp brightness was increased by 3.7%ISO when compared XDPQ and DPQ bleaching pulp under identical conditions. The pulp brightness was increased by 4.1%ISO when compared XDED and DED bleaching pulp under identical conditions. The untreated and pretreated Soda-AQ pulp of fast-growing poplar by the xylanase of two-dimensional and three dimensional figure of fiber surface under AFM were analyzed to explain the xylanase effect in the pulp bleaching theoretically.
Effect of Plant Starch on the Production of Glucoamylase from Aspergillus niger
Authors: Liang Xin Hong , Zhao Gong Ling , Guo Zu Feng , Tang Yu
Published: December 2011

Abstract. Glucoamylase is an inducible enzyme and generally induced in the presence of starch. Corn starch, wheat starch, sweet potato starch and potato starch were used as the carbon sources to produce the glucoamylase by A. niger FJL0801. The results showed that the maximum glucoamylase activity was 594.511.7 U/mL when 4% sweet potato starch was used as the carbon source, its enzyme activity was increased by 34.9% than potato starch, by 17.2% than wheat starch and by 4.6% than corn starch. In the four media, the adaptive phage of A. niger FJL0801 were all 0-12 h, the logarithmic growth phase all 12-60 h, and the stationary phase all 60-192 h. The maximum biomass of the strain was 1.950.09 μg/mL in the corn starch medium. The glucoamylase activity was inversely proportional to the growth rate of A. niger FJL0801. The final pH value was all within 6.960.057.110.07 in the four midia. There was no significant difference at 0.05 probability level between the pH of the four media at the same fermentation time. The pH change was not the reason for glucoamylase activity by A. niger FJL0801 used different plant starch.
Study on Brain Fatigue Based on EEG Signals
Authors: Pang Chun Ying , Zhao Chun Hua , Xu Feng Juan
Published: December 2011

In order to detect human brain fatigue,we recorded EEG signals of 50 subjects by means of MP150 recorder system.The subjects were divided into two groups.One group was in mind fatigue state,the other was controled group who had full of energy.We analysed the EEG signals by wavelet packet decomposition method.After analysis and reconstructure operation,we got the α,β,γ,δ rhythm and the power spectrum distribution of these componengts.Compared with the control,the human in fatigue state have enhanced α wave and reduced β wave.So the conclusion is that the redistribution of α and β wave could regard as a potential diagnostic critera of brain fatigue.
Effect of MIG1 Gene Deletion on Glucose Repression in Baker’s Yeast
Authors: Zhang Yan , Xiao Dong Guang , Zhang Cui Ying , Sun Xi , Wu Ming Yue
Published: December 2011

Mig1p, a zinc finger class of DNA-binding protein, plays a critical role in glucose repression for maltose utilization in Baker’s yeast. Maltose is the hydrolyzate of starch, which is the main component of dough. In this study, the recombinant yeast strains with MIG1 gene deletion were constructed, and the maltose metabolism of the parental and mutant strains in batch cultivations were investigated. Our results show that the degree of glucose repression of mutants △MIG1α and △MIG1a are reduced by 49.88% and 41.59% respectively compared to their parental strains, suggesting that MIG1 deletion can partially relieve glucose repression of maltose metabolism.
The Flavor Property of Soft Cheese Fermented by Two Stains of Streptococcus thermophilus and Made of Reconstituted Milk
Authors: Li Yan Hua , Zhang Lan Wei , Wang Wei Jun , Zhang Li Li , Han Xue , Jiao Yue Hua
Published: December 2011

The effect of reconstituted milk inoculation with Streptococcus thermophilus TM11 and Streptococcus thermophilus SP 1.1 on soft cheese volatiles was investigated. The impact flavors of 2,3-butanedione, 2,3-pentanedione, ethyl acetate, methyl butyrate, ethyl butyrate, butyl acetate and butyric acid were only detected in the fermented cheeses. Levels of diketones were higher in the cheeses fermented by mixed cultures than single culture, while levels of esters except ethyl acetate and butyl acetate showed an opposite tendency. There was significant difference in the levels of 2-hexenal and 2-nonenal among the cheeses. Other compounds originated from lipid oxidation, Strecker degradation, biosynthesis and forages were not significantly influenced by milk inoculation with Streptococcus thermophilus.
Study on Antioxidant Activity of Aqueous Extracts from Scum of Mixed Juice
Authors: Pu Yuan Yuan , Zou Qing Song , Feng Zi Yan , Lu An Gen , Han Zhong , Yuan Zhu Lian , Chen Shan
Published: December 2011

The scum of mixed juice is a by-product in sugarcane factory, which used up-floating method for mixed juice clarification. The scum is of great research and utilization value due to its rich organic non-sugar compounds such as proteins, lipids and polyphenols. Studies on the free radical scavenging capacity and reducing power of water extraction sample (A) and macroporous resin purified sample (B) from mixed juice scum were investigated, comparing with Vc. It was showed that the antioxidant activity of macroporous resin purified sample (B) was much stronger than that of water extraction sample (A) and Vc in , and system. For example, the scavenging capacity of sample B on was 11 times than that of Vc and 1450 times of sample A. In addition, the free radical scavenging activity of sample A and B was dependent on the sample concentration. Results in this study indicated that scum of mixed juice may be a promising natural antioxidant, which can be used as additives in food industry or feed industry.
Kinetic Study of Titanium-Modified Phenolic Resin Curing Process by DSC Analysis
Authors: Shen Shi Hong , Zhang Yan , Liu Yu Jian
Published: December 2011

A Titanium-modified phenol-formaldehyde resin (Ti-PF) was prepared. FT-IR was adopted to characterize the molecular structure of the modified resin. And the curing behavior and curing kinetic characteristics were studied by differential scanning calorimetry (DSC). The initial curing temperature Ti, the exothermic peak temperature Tp and the end curing temperature Td of Ti-PF are 153.1°C, 172.5°C and 193.9°C, respectively, all about 10°C higher than that of the unmodified phenolic resin. The Kissinger and Crane equations were applied to establish the curing kinetic parameters of Ti-PF. The kinetic analysis indicates the activation energy for the Ti-PF is 79.9kJ•mol-1, lower than that of the unmodified phenolic resin(87.6kJ•mol-1). In addition, the thermal degradation behavior of the cured Ti-PF was studied by thermal gravimetric (TG) method. TG results show that the char yield of Ti-PF is 73.3% at 850°C, while that of the unmodified phenolic resin is only 62.3%. It demonstrated that titanium-modified phenolic resin has much better thermal stability compared with the unmodified one.
Antioxidant Properties of Cashew Apple Wine (CAW)
Authors: Zhong Qiu Ping , Li Yong Cheng
Published: December 2011

In this study, total polyphenols content (TPC) and ascorbic acid content (AAC) in CAW were quantified. Total antioxidant activity, reducing capacity, and free radical scavenging activity of CAW were assayed. The TPC and AAC were 160 mg GAE /100ml and 132 mg/100 ml，respectivity. CAW exhibited effective antioxidant activities in the employed in vitro experiments, including total antioxidant activity, reducing capacity, and free radical scavenging activity, which indicates that phenolic compounds and ascorbic acid may play a key role in the antioxidant function of CAW.
Optimization of L-Arabinose Hydrolization from Corn Fibers Using Response Surface Methodology
Authors: Zhang Ze Sheng , Zheng Min , Zou Hong Fei
Published: December 2011

The main objective of this study was to optimize the hydrolyzing conditions of L-Arabinose from corn fibers. The response surface methodology was used for the optimization. Independent variables were the concentration of the oxalic acid (2-4%), the hydrolysis time (3.5-4.5h) ,the dosage of the oxalic acid(6-10ml/g,v/w)and the reaction temperature (80-100°C). Significant regression model describing the changes of L-Arabinose yield with respect to hydrolysis parameters were established with the coefficient of determination, R2= 0.9501.Data were analyzed by Design Expert 7.0 and regression analysis. The L-Arabinose yield ranged from 7.53% to 11.46%. The models had significant effects on L-Arabinose yield at P<0.05. Optimum the hydrolysis time, the concentration of the oxalic acid, the dosage of the oxalic acid and the reaction temperature were 3.86h, 3.97%, 6mL/g (v/w) and 100°C, respectively. This combination gave 11.46% L-Arabinose yield.
The Distribution and Pasting Properties of Starches in Fresh Sweet Potato (Ipomoea batatas Lam.) Tuber
Authors: Shi Yu Zhong , Tian Feng He , Zhang Jun He , Zhang Bao Bao , Jin Wei Na , Jia Yan Yu
Published: December 2011

This study focused on the distribution and pasting properties of starches in sweet potato (Ipomoea batatas L.) tuber. A fresh sweet potato tuber was cut into six equivalent parts. The extractable contents and pasting properties of starches from different parts of fresh sweet potato tuber were determined. The results showed that the extractable content of starches from the Middle section of sweet potato tuber is lower than that from the head and the end section of sweet potato tuber. The extractable content of starches from the inner-end part and the outer-Middle part of sweet potato tuber are 16.2% and 10.3% respectively. The amylose content of starches is relatively higher in the Middle section and outer layer of sweet potato tuber. The amylose content of starches from the outer-Middle part and the inner-end part of sweet potato tuber are 29.5% and 26.7% respectively. Pasting properties of starches from different parts of sweet potato tubers are different from each other. Among them, the starches from inner-end part of sweet potato tuber have the highest viscosities and a lower breakdown.
Synthesis of Triaxial LiFePO4 Nanorod with Graphite through the Electrospinning Method
Authors: Ma Yan Chun , Yang Yong Bin , Xiong Yue Ping
Published: December 2011

A triaxial LiFePO4 nanorod with Graphite was successfully synthesized through the electrospinning method.In order to improve lithium-ion battery cathode material lithium ion phosphate properties, to enhance its electronic conductivity and lithium ion diffusion rate and lower electrode polarization, the present invention was prepared by using electrospinning lithium-ion battery cathode material lithium iron phosphate / graphite nanorods. The following is the process: first of all, precursor solution is prepared by electrospinning, the use of high voltage power supply, LiFePO4/graphite nanorods, and then the use of LiFePO4 / graphite nano-fiber sintering, and use change to reduce the carbon content of the sintering process, with varying carbon content of LiFePO4/graphite nano-rod nanorods.
Synthesis of Glycine Using Two-Step Reaction Approach in Alcohol and its Purification
Authors: Yang Li Min , Jiang Ni Ni , Zhao Zhen Ying
Published: December 2011

A two-step reaction approach in alcohol, which comprised a step of monochoroacetic acid reacting with ammonia and a step of the resulted ammonium monochloroacetate reacting with ammonia in presence of urotropine as catalyst, was employed to synthesize glycine. Operating conditions for synthesizing glycine and for purifying glycine product were investigated through intensive experimental approach. The optimal operating conditions for the whole process including synthesis and purification of glycine were obtained and tested. Under such conditions, for methanol as reaction media and for methanol aqueous solution as separating agent, the glycine product yield reaches 92.9% with a purity of 99.7%, whereas for methanol as reaction media and for ethanol aqueous solution as separating agent, the glycine product yield is 89.5% with a purity of 98.6%.
Electrochemical Corrosion Characteristic of Structured Low Carbon Steel DC04 and Stainless Steel 304 Sheets in Sodium Chloride Solution
Authors: Kornienko Elena , Ossenbrink Ralf , Michailov Vesselin
Published: December 2011

In this work structured sheet metals were investigated using electrochemical measurement techniques. The main purpose is obtaining fundamental information about the corrosion resistance of structured sheet metals in comparison to smooth sheet metals as well determination of the influence of the structuring process on the corrosion properties. The corrosion resistance of structured sheet metals is affected by manufacturing process. One of the main influence factors is the change of the surface roughness. In this study the low carbon steel DC04 and the stainless steel 304 (X5CrNi18-10) were investi-gated. The electrochemical tests were carried out in 3%-NaCl solution. Potentiodynamic linear polarization was used to determine such electrochemical characteristics as the free corrosion potential, the corrosion current, the pitting and protection potential. Furthermore, the corrosion rate was calculated for smooth and structured sheet metals of the low carbon steel DC04. For the stainless steel 304 the pitting density was estimated. The surface roughness was measured for both materials. The electrochemical corrosion tests show a small difference in the corrosion behaviour of structured and smooth sheet metals. Structured sheet metals have a lower corrosion resistance than smooth sheet metals. The steel DC04 shows the worst corrosion properties at the structure location “negative” in comparison to the structure location “positive”. The corrosion resistance of the stainless steel 304 is better at the structure location “negative” than at the structure location “positive”. Moreover, the results show the correlation between the surface roughness and the corrosion resistance for structured sheet metals.
A Study of Bright Sn Electroplating Technology in Methanesulfonic Acid System
Authors: Chu Hong Tao , Zhang Jin Qiu , An Mao Zhong
Published: December 2011

A bright tin coating was prepared by electrodeposition method in the electroplating system of methanesulfonic acid. The effects of methylsulfonic acid concentration, main salt concentration, current density and brightener on brightness of coating were investigated by orthogonal experiment. A plating process of bright tin was confirmed: concentration of methylsulfonic acid: concentration of Sn2+: current density: 2.5A/dm2, dosage of brightener: at the same time, current efficiency, throwing power, covering power and electrochemical behavior for the process were inspected systematically. And the coatings are characterized by X-ray diffraction analysis (XRD) and scanning electron microscope (SEM).
Preparation and Characterization of a Novel Gel Polymer Membrane Based on a Tetra-Copolymer
Authors: Zhang Lan , Zhang Shi Chao
Published: December 2011

A acrylonitrile (AN)-methyl acrylate (MMA)-methoxy polyethylene glycol(350) monoacrylate (MPGA)-lithium acrylate (LiAc) tetra-copolymer was synthesized by emulsion polymerization, and phase inversion technique was adopted to prepare the as prepared polymer based microporous membrane. The gel polymer electrolytes (GPEs) were obtained by soak the as-prepared microporous membrane into 1M LiPF6/ (EC (ethylene carbonate) + DEC (diethylene carbonate)) (1:1 vol) electrolyte. FTIR, NMR and TGA/DSC measurements are used to character the components and structure of the polymer. The GPE’s ionic conductivity exceeds 3.0×10-3S/cm at ambient temperature, and this system also shows a sufficient electrochemical stability with a decomposition voltage as much as 6.0V vs Lithium(Li)/Li+ to allow far wider operation in the rechargeable lithium-ion polymer batteries. What’s more, this membrane also shows good characters in battery’s charge-discharge cycles.
Investigation of Anticorrosive Trivalent-Chrome Coatings on 6063 Aluminum Alloy
Authors: Yu Hui Cheng , Lei Fu Hou , Deng Guang Hui , Tan Xue Cai
Published: December 2011

In this work, Chromium (Cr(III)) conversion coatings on Al 6063 alloy was prepared using trivalent-chrome compound (KCr(SO4)2) and H3PO4. The influence of five variables (i.e. deposition temperature, time, bath pH, and concentrations of (Cr(III)) compound (KCr(SO4)2) and H3PO4) on the preparation of (Cr(III)) coating on Al 6063 alloy was investigated using polarization curve in 3.5 wt% NaCl solution. The parameters of polarization curves were obtained from the extrapolation of anodic and cathodic Tafel lines. The optimum chemical passivation parameters of the chromium (Cr((III)) conversion coatings on the 6063 Al surface were obtained in this paper The results show the chromium (Cr(III)) conversion coatings formed under the optimal range present better corrosion resistance than those under the other conditions. Proper mechanisms were proposed to explain the above electrochemical behavior for the five treated conditions.
Electrochemical Degradation of RDX in Aqueous Solution at Constructed Sb-Doped SnO2 Anode
Authors: Chen Yong , Hong Lei , Shi Wei , Han Wei Qing , Wang Lian Jun
Published: December 2011

The constructed Sb-doped SnO2 electrode was obtained for electrochemical degradation of RDX. The influences of current density and initial concentration of RDX on electrochemical degradation of RDX were studied. Kinetics analysis shows that the electrochemical degradation of RDX follows the pseudo first-order reaction. The mechanism of electrochemical degradation of RDX was also discussed.
Numerical Integral in the Ideal Adsorbed Solution Theory
Authors: Feng Quan Li , Lian Ming Lei , Wang Xue Qian , Ning Ping
Published: December 2011

The ideal adsorbed solution (IAS) theory has an advantage that no restriction exists for the type of pure component isotherm. One can choose the isotherm that fits the experimental data best. However, the theory requires a lot of numerical calculation, including numerical integration. This study shows that IAS needs very accurate values of numerical integration when the D-R equation is used as a single component isotherm. The error of numerical integration should be set to be no larger than 10-7. Otherwise the error of numerical calculation will occur, which may increase prediction deviation.
Preparation and Crystal Structure Nickel Acetate Tetrahydrate
Authors: Tai Xi Shi
Published: December 2011

The crystals of nickel acetate tetrahydrate have been obtained in the existence of 4-amino-2-methylquinoline. The crystal structure of the nickel acetate tetrahydrate was determined by X-ray single crystal diffraction analysis. The crystal data for nickel acetate tetrahydrate: monoclinic, space group P2(1)/c, a = 0.48319(9) nm, b = 1.1900(2) nm, c = 0.85531(17) nm, V = 0.49064(16) nm3, Z=2, M r= 248.86, De = 1.685 g/cm3, T = 298(2) K, F (000) = 260, R = 0.0756 and wR = 0.1662. The complex forms three-dimensional network structure through hydrogen bonds.
Regulator Experiment of Lubricating Oil Reutilization of DongFeng 4B (DF4B) Type Locomotive
Authors: Wang Chong Zhuo , Wang Bao Hui
Published: December 2011

With the increase of locomotive traction tonnage and train speed improvements, the DF4B locomotives have been in heavy load and high speed working condition for long time, while the lubricating oil dilution problem has not been solved. We have been in the research of the three-generation oil dilution of theDF4B locomotives in laboratory simulation experiment, especially in the oil addition experiments of the kinematic viscosity, and got a numerical trend graph and regression empirical formula. Through the diluted oil adjusting agent experiment, we inspected DF4B locomotives diesel engine for a period of tracking, and discovered that the modified oil has little influence on locomotive riding quality, thereby providing the new thought of reusing and saving the oil resources.
Electroless Plating of Gold by Using “Au—Amino Acid” Complex
Authors: Li De Liang , Luo Jie , Han Li Lu , Peng Yun , Zhong Di Yuan
Published: December 2011

A novel chemical deposition process based on aurous-glycine complex was reported in this paper. By using single factor’s and orthogonal experiments the optimal plating index has been gotten and they are: pH=4~6,[Au]=1.5~2.5 g/L , temperature 40~55 Ċ and plating time 6~8min respectively. Deposition results and quality inspection of the plated panels show that its plating rate is as fast as that of the gold-cyanide complex and reaches 0.020~0.025 um/min, and the quality related parameters including appearance, adhesion power and gold thickness can meet the standard of the modern PCB products.
Photocatalytic Oxidation Degradation Behavior on Fracturing Wastewater in Oilfield
Authors: Wan Li Ping , Meng Ying Feng , Li Gao , Zhou Hua
Published: December 2011

Due to great variety additives and disposal difficulty, chemical method, biochemical method and solidification are adopted to treat fracturing wastewater in oil field. These processes easily bring about shortcomings, including high cost and secondary pollution. Studied on the treatment of fracturing wastewater of 4# well in Sichuan Oilfield by modified bentonite loading TiO2-Ag2O composite catalyst, COD removal rate is determined for different condition of pH value of solution, adding content of TiO2, inflating volume and light application time. The optimal condition is obtained as follows: pH value of solution is 3, adding content of TiO2 is 0.4-0.5%, inflating volume is 15L/min and light application time is 3h. Under this condition, COD removal rate of fracturing wastewater is 58.1%. The composite catalyst performance is stable and without secondary pollution. It is reusable by high temperature activation, so it can reduce wastewater treatment cost, and should be widely applied.
Scaling Factors of ASP Flooding in Oilfield
Authors: Yu Lan Lan , Wang Bao Hui , Guan Xiao Yan
Published: December 2011

According to the experimental conditions of ASP scene, the indoor simulation experiments were designed to measure the equilibrium concentrations of soluble silicon ion, calcium and magnesium ions under different conditions, then to determine the main scaling influence factors of ASP flooding. The results showed that silicon ion scale was seriously affected by pH value and temperature in a single silicon ion system. Under the polyacrylamide and surfactant single role, the influence to scale was not obvious, and with the higher concentrations of polyacrylamide, surfactant, calcium and magnesium ions,it was easier to form the scale.
Supercritical Fluid Spray Dyeing: A New Method of Dyeing and Simulations of its Flow Field
Authors: Wang Ming Lu , Wang Wei Qiang , Qu Yan Peng , Liu Yan , Xu Zhi Yong
Published: December 2011

The supercritical fluid flow jetted out from a nozzle was divided into two stages, free jetting and passing through the porous media, in a supercritical spray dyeing process. According to the nature of the flow, the free jetting model and passing through porous media model were established separately. Based on the established models, the characteristics of supercritical fluid flow field in the supercritical fluid spray dyeing process were investigated firstly in this paper. Distributions of the temperature and pressure and their influencing factors in the flow field, which are the determinants of the spray dyeing process, were obtained and analyzed. Besides, the mass flow and covering diameter sprayed by supercritical fluid were studied. The simulating analysis may provide a theoretical basis and guidance for the actual process of supercritical fluid spray dyeing.
Study on ANAMMOX Treatment of Ammonium-Rich Wastewater
Authors: Zhao Qun Ying , Wang Xiao Chang
Published: December 2011

ANAMMOX is a biological reaction system that it can convert ammonium and nitrite to N2 without organic matter and oxygen in reactor. The reaction happened in anaerobic conditions, so it needs little energy. But ammonia oxidation belongs to difficult development germ, this restricted the technology application at the industry. The UBF reactor was used to treat ammonium-rich wastewater in the test, and we control the pH is about 8, HRT is 24h and temperature is about 28°C. Abundant ammonia oxidations were cultured succeed in the UBF reactor. Ammonium and nitrite achieve 89% and 92% respectively and the volume load of reactor is 0.773kgTN/m3.d after 100d of operating UBF reactor.
Flame Retardancy and Mechanical Property of Bi-Layer Polypropylene Sheets with Flame Retardant Selective Distribution
Authors: Xu Yuan Yuan , Guo Zheng Hong , Fang Zheng Ping , Wu Yu
Published: December 2011

The flame performance and mechanical property of bi-layer polypropylene/intumescent flame retardant/clay (PP/IFR/clay) sheets with flame retardant selective distribution were studied. The cone calorimeter measurements demonstrated that the selective distributed IFR can further reduce the peak first heat release rate (PHRR1), especially for the reduction in normalized mass loss. The digital images for the char residues after cone tests suggested that the char layer formed by the IFR particles in the selective distribution PP samples was more rapid and effective. The presence of IFR particles decreased the tensile strength and fracture strain of PP/IFR composites. The IFR composite with IFR particles selective in one layer can improve the fracture strain.
Time Response Analysis of Ag-Cs2O Photoelectric Thin Film
Authors: Zhang Li Sha , Dai Hong Xia
Published: December 2011

Photoelectric thin film is an important information functional material transforming optical signals into electric signals. Composite dielectric photoelectric thin film formed by burying metal nanoparticles in semiconductors is different from traditional photoelectric thin film. It has ultra-fast time response, plays a vital role in the conversion of photoelectric pulses and the diagnosis and measurement of multi-wavelength ultra-short pulses and may be applied in high-speed optical and optoelectronic devices.
Magnetorheological Fluid Test and Application
Authors: Zhao Dong Mei , Liu Xue Peng
Published: December 2011

Magnetorheological fluid is a kind of new intelligent materials, because of its good controllable and mechanical properties; therefore it can be widely used in aerospace, mechanical engineering and automotive engineering, precision processing engineering, control engineering and engineering field. This paper introduces magnetorheological fluid mechanics model of MRF, temperature static shear yield stress, and the influence of MRF static shear yield stress test, introduces magnetorheological fluid in the application of variable hardness collar. The application tendency of the magnetic fluid flow is pointed out
Evaluation Pattern of Irrigation Influence on Eco-Environment Based on Public Participation
Authors: Zhou Zhen Min
Published: December 2011

Firstly, the principle of public participation in evaluation of irrigation influence on eco-environment was analyzed. Then, the formation of quantitative evaluation systems of irrigation influence on eco-environment was studied, which includes the scope and purpose of public participation in evaluation, the evaluation programs, the forms and evaluation methods of the public inquiry, etc. The matrix of irrigation influence on eco-environment, evaluation index, methods and requirement were set up. Finally, selecting Heigangkou Yellow River Irrigation Area as an example, quantitative index systems of public participation in evaluation of irrigation influence on eco-environment were calculated.
The Adsorption Behavior of Reactive Dye on Magnetic Chitosan Coated Cotton Fibers
Authors: He Xue Mei , Xie Kong Liang
Published: December 2011

A new composite magnetic chitosan coated cotton (MSCC) fiber with 3-glycidyloxypropyltrimethoxysilane (GPTMS) as a crosslinking agent was prepared for the adsorption of C.I. Reactive red 194 from aqueous solution. The structure and morphology of MSCC fibers were analyzed by FTIR and SEM. The adsorption behavior of C.I. Reactive red 194 from aqueous solution onto MSCC fibers was investigated under various experimental conditions such as initial concentration of the dyes, temperature, pH and adsorb time. Experimental data indicated that the adsorption capacity of MSCC fibers on C.I. Reactive red 194 was higher in acidic rather than in basic solutions. A rise of temperature accelerates mass transfer of dyes into the MSCC fibers. The kinetics of the interactions was best described by pseudo-second-order mechanism.
Simulation Analysis of Slope Stability Based on Strength Reduction
Authors: Zhang Dong Ming , He Hong Fu , Chen Jiang , Wang Yan Zeng
Published: December 2011

The characteristic of the stress and strain distribution of rock landslide are simulated by ANSYS finite element software, while its variation and distribution of plastic zone are analyzed by shear strength reduction method at the same time, which are used to search out the most dangerous slip surface. Calculation results show that: (1)Geotechnical landslide along the interface has decline; the stress increases by the depth of the slope and presents the layered distribution in the X, Y directions. (2)According to the contours of the plastic strain, the plastic strain contour ridge is the most dangerous slip surface. (3)Safety coefficients are offered by calculating the non-convergence, the maximum horizontal displacement and horizontal displacement of feature point mutation in slope failure criterion, to provide the basis for the landslide hazard warning.
Desulfurization of Fuel Oils by Extraction with Ionic Liquids
Authors: Yu Xiao Jiao , Hao Hai Ling , Zhang Jian , Zheng Gang , Yao Bing Hua
Published: December 2011

Four N-alkyl-pyridinium-based ionic liquids, N-ethyl-pyridinium hexafluorophosphate, N-butyl-pyridinium hexafluorophosphate,4-methyl-1-ethyl-pyridinium hexafluorophosphate，and 4-methyl-1- butyl -pyridinium hexafluorophosphate were synthetized by microwave method . The simulated gasoline was prepared by mixing n-hexane, n-heptane,toluene and thiophene. Effect of extraction temperature, the ratio of solvents and diverse ionic liquids are investigated with extraction equilibrium experiment. The best conditions of transport desulfurization are discussed. The result showed that the partition ratio of [MBPy]PF6 to the thiophene could exceed 1.3 at temperature 45°C , the ionic liquid composition in rafﬁnates was undetectable, [MBPy]PF6 has the best effect on the selective removal of sulfur-contSubscript textaining compounds from gasoline among these ionic liquids. When temperature is 50°C and desulfurization agent to fuel oil is 1:1, the extraction efficiency can reach over 90% only three-step extraction for gasoline.