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Clinical Application of the Anterior Maxilla Atraumatic Immediate Implant by Cone Beam Computer Tomography
Li Wen-chao,
Ruan Ning,
Zu Wei,
Tian Yuan,
Lin Yang,
Zhao Min-qiang,
Lei Bo-cheng,
Wang Yi-fu,
Cheng Wen
Issue:
Volume 4, Issue 2, April 2016
Pages:
61-64
Received:
22 April 2016
Published:
4 May 2016
Abstract: This paper is aimed to investigate the value of using con-beam computer tomography(CBCT)to evaluate bone volume and labial bone wall integrity in the anterior maxillar,and guide atraumatic immediate implant.Thirty patients who planed to receive atraumatic immediate implant in the anterior maxillar under-went CBCT scan. After analysis of 6 patients with 8 tooth labial bone wall intact, alveolar crest width is greater than 5mm, less than or equal 7mm, which suitable for atraumatic immediate implant and bone defects not filling,while 14 patients 20 tooth labial bone wall intact, alveolar crest width is greater than 7mm, which suitable for atraumatic immediate implant and bone defects need to be filled by bio-oss collagen. 10 patients 14 tooth labial bone wall defects or bone buried teeth, which did not suitable for atraumatic immediate implant and excluded in this study.The treatment outcomes were Assessed postoperatively.According to the results of 20 patients with 28 tooth completed the atraumatic immediate implant, 14 patients 20 bone defects were filled by bio-oss collagen.CBCT detected the value of anterior maxillary alveolar bone and alveolar bone measured value is consistent. The research shows that CBCT imaging plays an important role in determining bone quality and evaluating labial bone wall integrity in anterior maxillar and guiding atraumatic immediate implant.
Abstract: This paper is aimed to investigate the value of using con-beam computer tomography(CBCT)to evaluate bone volume and labial bone wall integrity in the anterior maxillar,and guide atraumatic immediate implant.Thirty patients who planed to receive atraumatic immediate implant in the anterior maxillar under-went CBCT scan. After analysis of 6 patients ...
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Distribution Characteristics and Source of the Heavy Metal in Jianghan Oilfield,China
Ou Yanghao,
Zuo Limin,
Yu Ronghua,
Cai Liegang,
Li Zhimin,
Liu Hui,
Jiang Yaming,
Peng Zhenghua
Issue:
Volume 4, Issue 2, April 2016
Pages:
65-69
Received:
3 May 2016
Published:
4 May 2016
Abstract: Selected within Oilfield wells abandoned mine sites, to collect soil samples at different depths to test the heavy metal content, explore the vertical distribution of heavy metal content, combined with the soil texture and the surrounding environment of the samples, the study area to explore sources of heavy metals. Studies have shown that the four heavy metals content are quite different, the lead(Pb) content is inbetween 0.7-33 mg / kg, the nickel(Ni) content is inbetween13-55mg / kg, barium(Ba) content is inbetween 110-725mg / kg, the cobalt(Co) content is 15-60mg / kg. These four heavy metals are mainly comes from exogenous human activities, including oil exploration, atmospheric deposition, vehicle emissions, manure and fertilizer.
Abstract: Selected within Oilfield wells abandoned mine sites, to collect soil samples at different depths to test the heavy metal content, explore the vertical distribution of heavy metal content, combined with the soil texture and the surrounding environment of the samples, the study area to explore sources of heavy metals. Studies have shown that the four...
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Effect of Different Mutation Methods on Xylanase Production Ability by Aspergillus Niger
Zheng Lili,
Sheng Zhanwu,
Ai Binling,
Zheng Xiaoyan,
Jin Zhiqiang
Issue:
Volume 4, Issue 2, April 2016
Pages:
70-74
Received:
3 May 2016
Published:
4 May 2016
Abstract: Based on the Aspergillus niger AS3.350, the mutants were brewed through inducing five treatments.The effect of different mutation methods on enzyme production ability of Xylanase was disscused and obtainedmutant strain of Xylanase production high ability. The results indicate that: the mutagenesis of UV irradiation and fast neutron irradiation was sensitive to increasing Xylanase activity. UV irradiation seted at 256 nm wavelength,the vertical distance was 20cm,exposure time was 90s, obtained mutant UV256-90 of the emzyme activity was 170.79U/ml,it was 2.18 times of the original strain.The rate 0.0025Gy / s of fast neutron irradiation and vertical distance 12cm,the optimal dose is 0.75Gy, screened out the mutant Fn5-2, the activity is 134.77U/ml,its 1.72 times of the original strain. Mutagenesis by diethyl sulfate, sodium nitrite, and nitrosoguanidine, enzyme activityof the optimal mutant strains were recently starting strain of 1.51 times, 1.46 times, and 1.38 times.Two physical mutagenic methods include ultraviolet mutagenesis and fast neutron irradiation were more sensitive on producing xylanase based on aspergillus Niger.
Abstract: Based on the Aspergillus niger AS3.350, the mutants were brewed through inducing five treatments.The effect of different mutation methods on enzyme production ability of Xylanase was disscused and obtainedmutant strain of Xylanase production high ability. The results indicate that: the mutagenesis of UV irradiation and fast neutron irradiation was ...
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The Extraction of Linalool from Coriander Seeds by Steam Distillation
Yuelin Zhang,
Zhanrong Sun,
Xu Chen,
Qin Chen
Issue:
Volume 4, Issue 2, April 2016
Pages:
75-78
Received:
22 April 2016
Published:
4 May 2016
Abstract: Linalool is crucial chemical raw material which is widely used in food flavoring, perfumery cosmetic and pharmaceutical industry. The natural linalool from coriander seeds volatile oil was extracted by steam distillation method and analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). Effects of pretreatment (smash, testa chipping, soak and boiling), solid-liquid ratio (weight of coriander seeds (g): volume of deionized water (mL)) and the extractant (ethyl acetate and ether) on natural linalool extracted from the volatile oil were studied. The result shows that when the coriander seeds were smashed and soaked for 3 hours, the ratio of solid-liquid was 1:7, the time of distillation was 4h and the extractant was ether, natural linalool of the volatile oil was higher than the others, and the content was about 13.45g/kg. These results lay a foundation for the extraction of linalool from coriander seeds by steam distillation.
Abstract: Linalool is crucial chemical raw material which is widely used in food flavoring, perfumery cosmetic and pharmaceutical industry. The natural linalool from coriander seeds volatile oil was extracted by steam distillation method and analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). Effects of pretreatment (smash, testa chipping, soak and boi...
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Bilayer Distributed Energy Model with Pollution Consideration
Lin Yang,
Ming Li,
Xiangchao Gong,
Desan Ji,
Mingjin Liao
Issue:
Volume 4, Issue 2, April 2016
Pages:
79-85
Received:
22 April 2016
Published:
4 May 2016
Abstract: In this paper, the use of energy resource is combined with environmental pollution to establish the model of distributed energy system. The pollution problem is reasonally assessed by using environomics as the optimization tool of energy system, considering environment as consumable resources, and quantitative analysis on the environment problem caused by pollutants. The optimal solution is given by use of genetic algorithm with the comprehensive cost which contains pollution processing costs of energy supplying point and fines for pollution as the objective function. Besides, the network layout of supply chain of distributed energy system is also discussed with emphasis. The supply chains and heat supply pipelines of the whole distributed energy system are reasonally designed with a double programming model. Finally, the energy system is comprehensively assessed under the uncertain condition and unsafe factors, and then is optimized with a robust method, so that the model of distributed energy is economical, reasonal, safe and credible.
Abstract: In this paper, the use of energy resource is combined with environmental pollution to establish the model of distributed energy system. The pollution problem is reasonally assessed by using environomics as the optimization tool of energy system, considering environment as consumable resources, and quantitative analysis on the environment problem ca...
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Empirical Analysis of Price Fluctuation and Characteristics of Specialty Agriculture Crops – Under the Investigation on Pepper
Issue:
Volume 4, Issue 2, April 2016
Pages:
86-93
Received:
16 May 2016
Published:
18 May 2016
Abstract: Careen characteristic of modern agriculture crops, it is an important part of the modernization of agriculture. Pepper is one kind of important and special agricultural crop, price fluctuation will have an directly affection on increase of farmers income, thereby affecting the development of pepper industry. Based on the analysis of current situation and the causes of price fluctuation on pepper, making use of Variety of statistical measurement methods of Price Fluctuation and Characteristics of Chinese Pepper nearly eight years. The results show: Price volatility of pepper is of diversity. Price fluctuation of pepper showed a high frequency, low resistance, big discrete, slightly flat and moderate right-skewed distribution of morphological characteristics; Simultaneously Price fluctuation of pepper also has a seasonal, irregular, cyclical trend, cyclical, non-agglomeration features. Accordingly, the article suggest the government should Combine with price changes reasons of pepper, grasping the variation characteristics of pepper from all aspects, do the following work: macro statistical information, the main producing areas of support, information platform construction, perfection futures options and so on.
Abstract: Careen characteristic of modern agriculture crops, it is an important part of the modernization of agriculture. Pepper is one kind of important and special agricultural crop, price fluctuation will have an directly affection on increase of farmers income, thereby affecting the development of pepper industry. Based on the analysis of current situati...
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Advances in the Combination Therapy of Targeted Anti-Cancer Drugs
Jie Yang,
Yan Wu,
Zhen Wu,
Yong-Tao Cui,
Xiao-Qi Peng
Issue:
Volume 4, Issue 2, April 2016
Pages:
94-98
Received:
16 May 2016
Published:
18 May 2016
Abstract: The combination therapy of targeted anti-cancer drugs is important in the research of anti-cancer drugs. This articleintroduced the status of combination therapy of the same targeted and different targeted anti-cancer drugs, and analyzed the challenges and difficulties. In order to provide reference basis for development of combination therapy technique of targeted anti-cancer drugs in China.
Abstract: The combination therapy of targeted anti-cancer drugs is important in the research of anti-cancer drugs. This articleintroduced the status of combination therapy of the same targeted and different targeted anti-cancer drugs, and analyzed the challenges and difficulties. In order to provide reference basis for development of combination therapy tech...
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Feasibility Study of Azo Dye Treatment by Decolorized Metabolites-Assisted Salt-Bearing Microbial Fuel Cells
Pei-Lin Yueh,
Bor Yann Chen,
Chung Chuan Hsueh
Issue:
Volume 4, Issue 2, April 2016
Pages:
99-108
Received:
17 May 2016
Published:
18 May 2016
Abstract: Prior findings mentioned that -OH and -NH2 substitute-containing auxochrome compounds (e.g., 2-aminophenol and 1,2-dihydroxybenzene) could act as electron shuttles (ESs) for simultaneous dye decolorization and bioelectricity generation (DD&BG) in microbial fuel cells (MFCs). This feasibility study used decolorized intermediates (DIs) of reactive blue 171, reactive blue 5, reactive red 198 to show such significant electron-shuttling capabilities. Cyclic voltammetric inspections clearly revealed that some of DIs could act as ESs to enhance dye-decolorizing and bioelectricity-generating capabilities without dispute. However, electron transfer (ET) efficiency significantly reduced ca. 40% at higher salt conditions. With supplementation of DIs, ET efficiency was apparently augmented for highly efficient DD and BG. Meanwhile, significant stimulation of ET characteristics also overcame osmotic pressure-gradients between intracellular and extracellular compartments for promising DD and BG. Accumulation of DIs was kinetically favorable for expression of dye-decolorizing capabilities. Of course, such accumulation of DIs autocatalytically enhanced DD and MFC-assisted treatment was technically appropriate for ET-based bioremediation.
Abstract: Prior findings mentioned that -OH and -NH2 substitute-containing auxochrome compounds (e.g., 2-aminophenol and 1,2-dihydroxybenzene) could act as electron shuttles (ESs) for simultaneous dye decolorization and bioelectricity generation (DD&BG) in microbial fuel cells (MFCs). This feasibility study used decolorized intermediates (DIs) of reactive bl...
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Comparative Study on Biodecolorization Capabilities of Indigenous Strains to Azo Dyes
Chin-Tang Chen,
Chia-Chyi Wu,
Bor-Yann Chen,
Chung-Chuan Hsueh,
Mao-Lin Hsu
Issue:
Volume 4, Issue 2, April 2016
Pages:
109-115
Received:
17 May 2016
Published:
18 May 2016
Abstract: This study is to inspect the biodecolorization capabilities of indigenous strains to azo dyes (RR198, RR141, RBk5, RBu160, RBu171, DY86, RY84 and RG19). Shewanella sp. WLP72 isolated under selection pressure of decolorization of RBu160 upon gut microbial consortia of Babylonia areolate showed the optimal color removal capability. Due to this, WLP 72 had the highest capability to decolorize RBu160. Apparently, conditions of isolation of model dye(s) would affect dye-decolorizing capabilities of strains to be expressed. Moreover, the chemical structure effect of azo dyes would have a significant impact on decolorization efficiency as indicated through specific decolorization rate (SDR) of azo dyes by WLP72. The presence of electron-withdrawing groups (i.e., -SO3-) as the substituents at ortho- or para to azo bond would enhance decolorization efficiency. However, since the ortho substituent caused steric hindrance near azo linkage(s), azo dyes with para substituent could be more favorable than those with ortho substituent for decolorization. This study suggested that both the electronic characteristics of substituents in azo dyes and the positions of substituents related to azo bond on the aromatic ring all significantly affected the efficiency of biodecolorization of azo dyes.
Abstract: This study is to inspect the biodecolorization capabilities of indigenous strains to azo dyes (RR198, RR141, RBk5, RBu160, RBu171, DY86, RY84 and RG19). Shewanella sp. WLP72 isolated under selection pressure of decolorization of RBu160 upon gut microbial consortia of Babylonia areolate showed the optimal color removal capability. Due to this, WLP 7...
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Feasibility Study on Dye Decolorization Using Microbial Cultures Supplemented with Decolorized Metabolites of Hylocereus polyrhizus
Jen-Hung Yuan,
Chung-Chuan Hsueh,
Bor-Yann Chen
Issue:
Volume 4, Issue 2, April 2016
Pages:
116-121
Received:
17 May 2016
Published:
18 May 2016
Abstract: This feasibility study used indigenous microbes to implement assessment upon capabilites of dye decolorization with supplementation of decolorized metabolites (DM) of Hylocereus polyrhizus. As indicated, ca. 5% DM of Hylocereus polyrhizus could clearly exhibit reversible redox peak potentials via cyclic voltammetric analysis, revealing its significant capability as electron-shuttling mediators. Compared to DM-supplemented decolorization, the ranking of dye-decolorizing capabilities of bacteria was Shewanella putrefaciens WLP72> Enterobacter cancerogenus BYm30> Aeromonas hydrophila NIU01~ A. hydrophila YTl1> Klebsiella pneumoniae ZMd31. The ranking of biodegradability of azo dyes was RB160 > RBk5 > DY86˜=RG19 > RR141. Evidently, the presence of DM significantly stimulated bacterial decolorization performance of WLP72, BYm30, ZMd31. However, possibly due to inhibitory characteristics of DM to A. hydrophila, its dye decolorization was delayed. That is, using DM to enhance dye decolorization, biodecolorizers should be acclimated in such envionments for effective expression. The findings also pointed out that supplementation of DM to YTl1, WLP72 at ca. 10~15 % for decolorization of RR141 could effectively increase dye-decolorizing efficiency ca. 2.33~2.88 fold. Such DM augmentation inevitably could autocatalytically stimulate electron transfer capabilities for optimal wastewater decolorization with sustainable development.
Abstract: This feasibility study used indigenous microbes to implement assessment upon capabilites of dye decolorization with supplementation of decolorized metabolites (DM) of Hylocereus polyrhizus. As indicated, ca. 5% DM of Hylocereus polyrhizus could clearly exhibit reversible redox peak potentials via cyclic voltammetric analysis, revealing its signific...
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Effect of High Concentrations of CO2 on the Cell Density, Lipid Content and Fatty Acid Components of Nannochloropsis oceanica
Wang Yuejie,
Meng Fanping,
Cui Hongwu,
Duan Weiyan,
Yi Xiaoyan
Issue:
Volume 4, Issue 2, April 2016
Pages:
122-128
Received:
17 May 2016
Published:
18 May 2016
Abstract: In order to evaluate the capability of Nannochloropsis oceanica to product biodiesel, the cell density, lipid content and fatty acid components of N. oceanica under different CO2 concentrations were analized. The results indicated that the cell density and lipid content of N. oceanica were increased under 5% CO2, but the growth of N. oceanica was inhibited under 10% and 15% CO2. Over 88% of the N. oceanica lipids produced consisted of C16 ~ C18 fatty acids and the concentration of unsaturated fatty acids (>69%) is high and suitable for biofuel production. The highest content of eicosapentaenoic acid (EPA) was also obtained under 5% CO2. The present results suggested that N. oceanica was suitable biodiesel feedstock and the maximum economic effectiveness will be obtained using flue gas containing 5% CO2 in the cultivation of N. oceanica.
Abstract: In order to evaluate the capability of Nannochloropsis oceanica to product biodiesel, the cell density, lipid content and fatty acid components of N. oceanica under different CO2 concentrations were analized. The results indicated that the cell density and lipid content of N. oceanica were increased under 5% CO2, but the growth of N. oceanica was i...
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Effects of Artificial Light Source and Light Quality on the Growth of Two Species of Microalgae
Hongwu Cui,
Fanping Meng,
Yongfu Li,
Yuejie Wang,
Weiyan Duan
Issue:
Volume 4, Issue 2, April 2016
Pages:
129-136
Received:
17 May 2016
Published:
18 May 2016
Abstract: The effects of different kinds of artificial light source and light quality on two species of microalgae (Chlorella vulgaris and Dunaliella salina) of high resistance of acid, heat and CO2 concentration were investigated in this research, 9 light qualities (LR, LB, LW, FL, LR+LB, LW+LR, LW+LB, FW+LR and FW+LB) were set up with 4 kinds of light source (LED-Red (LR), LED-Blue (LB), LED-White (LW)) and Fluorescent lamp white (FW) to cultivate microalgae, while biological parameters and P-I curves were measured and drawn to evaluate the effect of light source and light quality on growth characteristics of microalgae, respectively. Results showed that -Pm of two microalgae were observed under the illumination of LED-W when 4 kinds of light source were employed. At the end of cultivation, maximum biomass of C. vulgaris were observed under the illumination of light qualities LW+LB, which were 0.19 g•L-1, however, the highest growth rate was obtained under the illumination of light quality LB by D. salina, which was 1.5 times as much as that in LR treatment. In addition, the nonuniformity between photosynthetic pigments content and μ along with the changed light quality indicated that the variation of photosynthetic pigments content may not be the main cause of microalgae growth regulated by light quality, while the light absorption of living cells might be the primary reason affecting the growth of microalgae.
Abstract: The effects of different kinds of artificial light source and light quality on two species of microalgae (Chlorella vulgaris and Dunaliella salina) of high resistance of acid, heat and CO2 concentration were investigated in this research, 9 light qualities (LR, LB, LW, FL, LR+LB, LW+LR, LW+LB, FW+LR and FW+LB) were set up with 4 kinds of light sour...
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Porous Resin Catalyst with Strong Acidity for Hydration Reaction of Butane and Its Catalytic Performance
Cai Jian-guo,
Shi Hong-yan,
Zhu Zhi-rong,
Shi Xiao-li
Issue:
Volume 4, Issue 2, April 2016
Pages:
137-141
Received:
19 May 2016
Published:
19 May 2016
Abstract: With nano-alumina modified by the fat acid as an inorganic template for making pores, a new kind of porous resin particle with the large surface was synthesized by emulsion polymerization. Moreover, the sulfonated polystyrene resin was fluorinated to increase its acid strength up to Ho 8.6 and the acid amount of 4.1mmol/g. The ratio of butane to water was increased by packing the catalytic resin with the fixed beds of four stages. Under reaction temperature of 168-174°C, butane to water ratio of 2 mol/mol and WHSV1.0 h-1, hydration reaction conversion was over 15 wt%, with the butyl alcohol selectivity of 99 wt% and a good thermal stability.
Abstract: With nano-alumina modified by the fat acid as an inorganic template for making pores, a new kind of porous resin particle with the large surface was synthesized by emulsion polymerization. Moreover, the sulfonated polystyrene resin was fluorinated to increase its acid strength up to Ho 8.6 and the acid amount of 4.1mmol/g. The ratio of butane to wa...
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Study on Panax notoginseng F.H.Chen Cultivation Under Forest
Gong Zhou,
Gong Fanwu,
Peng Jing,
Luo Xianquan
Issue:
Volume 4, Issue 2, April 2016
Pages:
142-146
Received:
19 May 2016
Published:
19 May 2016
Abstract: To overcome the Panax notoginseng F.H.Chen facility cultivation high cost and the consecutive monoculture problems of cultivated land, to satisfy the market demand, to save the production cost, improve the utilization rate of forest land, increase the income of forest farmers, protect the ecological environment, we has been used Yunnan wenshan Panax notoginseng F.H.Chen high quality seedlings for carring out cultivation technology research under forests, according to plant spacing 25 cm ×30 cm to planting, used randomized block design, repeated three times. We choice the Nut forest and China fir forest that the altitude is above 1000m and forests canopy density pond are 0.8 in shuping township Hongjiang, Gracp forest and Kiwi fruit forest that the altitude is 900m and forest canopy density of 0.6 and 0.5 respectively in tangwan township. The test results in 4 forests showed that cultivation growth of nut forest cultivation of Panax notoginseng F.H.Chen, crown diameter, survival rate, three years raw tuber weight were higher than the other three kinds of forests land, China fir forest is better than that of grape and Kiwi fruit forest, grapes forest is higher than the kiwi fruit forest at crown diameter and survival rate, but high growth and tuber weight below the kiwi fruit forest. when we cultivated Panax notoginseng F.H.Chen for scale cultivation under forests, Research results show that we should preference chioce Nut forest in Nut forest, China fir forest, Gracp forest and Kiwi fruit forest at Panax notoginseng F.H. Chen cultivation. because the nut are broadleaf deciduous tree species, lots of fallen leaves decomposed by decaing, increased the soil humus content that makes more loose fertile soil, better permeability, and damp, cool, more diffuse light and scattered light under forests. It is comformed to Panax notoginseng F.H.Chen ecological habit and the rule of the growth and development, and the Panax notoginseng F.H.Chen liked cloudy, joied the cool shade under forests, avoid direct light, liked oblique or scattered light. The Panax notoginseng F.H.Chen large scale cultivations undergrowth can overcome the facility cultivation cost high, production input more, technology is difficulty disadvantages such as, it’s can save the production cost, improve the utilization efficiency of forest land and increase the income of forest farmers, drive to get rich of local forest farmers, protect the ecological environment, promote the sustainable development of Panax notoginseng F.H.Chen industry.
Abstract: To overcome the Panax notoginseng F.H.Chen facility cultivation high cost and the consecutive monoculture problems of cultivated land, to satisfy the market demand, to save the production cost, improve the utilization rate of forest land, increase the income of forest farmers, protect the ecological environment, we has been used Yunnan wenshan Pana...
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Performance Investigation on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF)-Based Composite Cathode for Intermediate Temperature Fuel Cells
Zhao Chao-yue,
Zhu Wen-xia,
Wang Ting,
Zhang Jian
Issue:
Volume 4, Issue 2, April 2016
Pages:
147-150
Received:
19 May 2016
Published:
19 May 2016
Abstract: The Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Sm0.5Sr0.5CoO3-δ (BSCF-SSC) cathodes with pores have been prepared by doping different amount of SSC powders into BSCF. The composite materials BSCF-SSC were investigated thoroughly by electrical conductivity and electrochemical impedance spectra. The results showed that addition of SSC enhanced not only conductivities of cathodes but also performance of cathodes.
Abstract: The Ba0.5Sr0.5Co0.8Fe0.2O3-δ-Sm0.5Sr0.5CoO3-δ (BSCF-SSC) cathodes with pores have been prepared by doping different amount of SSC powders into BSCF. The composite materials BSCF-SSC were investigated thoroughly by electrical conductivity and electrochemical impedance spectra. The results showed that addition of SSC enhanced not only conductivities ...
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Diamond/Cu Composites Fabricated by Pressureless Infiltration Method
Jia Jin-Hao,
Xiong De-Gan,
Bai Shu-Xin,
Guo Wei-Qiang,
Du Guang-Bao
Issue:
Volume 4, Issue 2, April 2016
Pages:
151-155
Received:
22 May 2016
Published:
23 May 2016
Abstract: Copper matrix composites reinforced diamond (diamond/Cu) composites were successfully fabricated by pressureless infiltration method. The composition and structure of the coating are investigated using scanning electron microscopy(SEM), X-ray diffraction. The results indicate that the composition of the coatings is WC which is uniform on diamond. The microstructure and properties of diamond/Cu composites were investigated. The results show that the diamond/Cu composites were compact and WC transition layers onto diamond can greatly promote the compatibility between diamond and Cu. Further investigation reveals that the diamond/Cu composites possess low density (5.3907g/cm3), excellent thermal management function as a result of high thermal conductivity up to 761.1 W/(m•K) and a fine tightness (2.5×10-10 Pa•m3/s).
Abstract: Copper matrix composites reinforced diamond (diamond/Cu) composites were successfully fabricated by pressureless infiltration method. The composition and structure of the coating are investigated using scanning electron microscopy(SEM), X-ray diffraction. The results indicate that the composition of the coatings is WC which is uniform on diamond. T...
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Containing High Order Compact Scheme Source of Steady Convection-Diffusion Equation
Rongfei Wang,
Weihua Wang,
Jinhong Yang
Issue:
Volume 4, Issue 2, April 2016
Pages:
156-160
Received:
12 June 2016
Published:
12 June 2016
Abstract: Convection-diffusion equation have a wide range of applications in many practical engineering problems, such as magnetic confinement fusion problems, heat transfer, particle diffusion. Traditional solutionof convection-diffusion equation in magnetic confinement fusion is Crank-Nicolson scheme. This paper presents a new numerical solution of one-dimensional steady-containing source convection diffusion equation high accuracy difference schemes O(t2+h4), which proved to be unconditionally stable using Fourier analysis, numerical experiments show the accuracy and robustness of this format, this scheme has a higher accuracy.
Abstract: Convection-diffusion equation have a wide range of applications in many practical engineering problems, such as magnetic confinement fusion problems, heat transfer, particle diffusion. Traditional solutionof convection-diffusion equation in magnetic confinement fusion is Crank-Nicolson scheme. This paper presents a new numerical solution of one-dim...
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