Sandra Patricia Romero Nieto、J.J. Olaya2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Este artículo estudia la influencia de la transferencia de arco pulsado en el proceso de soldadura por arco eléctrico con gas de protección (GMAW, Gas Metal Arc Welding), sobre la microestructura, utilizando dos composiciones de gas de protección y los modos de transferencia de arco pulsado y corto circuito. Se caract…
Metal and Thin Film MechanicsWelding Techniques and Residual StressesMetal Alloys Wear and Properties
CHEN Na、Ye Xiang2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
In this paper,we present an investigation on the elastic properties of CdSe nanowires by using molecular dynamics simulation.The results show that the Young's modulus and Poisson's ratio of CdSe nanowires will decrease with increasing radius and the Young's modulus of all nanowires studied here are remarkably higher t…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
作者信息未提供2012-12-01Indian Chemical Engineer
The leading health risk factors for global burden of disease in 2010 were high blood pressure, tobacco smoking and alcohol use, respectively. Globally, 9.5 million lives were lost in 2010 owing to ...
Advanced Sensor and Energy Harvesting MaterialsPolymer composites and self-healing
G. N. Koshel、Т. Н. Нестерова、Yu. B. Rumyantseva 等 5 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Methods of cresols obtaining and the main directions of their applications were analysed. It was concluded that the synthesis of cresols on the basis of cymenes is most perspective nowadays.
Inorganic and Organometallic ChemistryPorphyrin and Phthalocyanine ChemistryAnalytical Chemistry and Chromatography
María Graciela Aguayo、Regis Teixeira Mendonça、Paulina Martínez 等 5 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Tension (TW) and opposite wood (OW) of Eucalyptus globulus trees were analyzed for its chemical characteristics and Kraft pulp production. Lignin content was 16% lower and contained 32% more syringyl units in TW than in OW. The increase in syringyl units favoured the formation of β-O-4 bonds that was also higher in TW…
Wood Treatment and PropertiesLignin and Wood ChemistryNatural Fiber Reinforced Composites
Dian Hendrayanti、Lestari Rahayu Kusmadji、Pratiwi Yuliana 等 5 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
In order to collect Indonesian Nostoc, isolation of soil microflora from several paddy fields in West Java, Bali, andSouth Celebes was carried out. Fast-growing isolates of Nostoc were selected to describe and perform molecular identification using partial sequences of 16S rRNA. The results showed that partial sequenc…
Diatoms and Algae ResearchIsotope Analysis in EcologyBiocrusts and Microbial Ecology
Elena V Nibogina2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
The method for solving the boundary value problem of the beam’s creep and creep rupture strength under condition of the pure bending based on the rod type structural model is proposed. Energy criterion of local element destruction is introduced. Comparative analysis of structural model calculated data and the quarter…
Structural mechanics and materialsMaterial Properties and Failure Mechanisms
Marise Bonifácio Queiróz、Theo Guenter Kieckbusch2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Os principais fatores que afetam a textura em um fondant são: formulação, relacionada com a existência de outros ingredientes além da sacarose; temperatura de cristalização; geometria do cristalizador, e velocidade de cristalização. Neste estudo, procurou-se avaliar a influência de parâmetros de processo sobre as cara…
Minerals Flotation and Separation TechniquesCalcium Carbonate Crystallization and Inhibition
K. J. Mohammed、M. F. A. AL.Baghdadi、W. I. Kurdi2012-12-01Anbar Journal of Agricultural Sciences
Gelatin had been processed from bones, heads. legs and skin which got from spent hens. The samples were cleared, cut and getting rid of oil by boiling then the removal of mineral salts was done by6% hydrochloric acid for 24 hours . After that samples were soaked in diluted base (0.2N NaOH ) for 18 hours and wash with…
Biopolymer Synthesis and ApplicationsCollagen: Extraction and Characterization
В. А. Харитонов、M. Yu. Usanov2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
In this work we showed that techniques such as drawing and broaching in roller don't let intensively to grind grain. Effective way of grind grain is radial-displacement broach. This paper also contains the results of modeling radial-displacement broach.
Material Properties and Applications
V. V. Guskov、В. В. Павлова、V. V. Ravino 等 5 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
The paper considers application properties of «Belarus»-family wheel-tractors, their complex and individual indices. A systematic approach for determination of systematically important parameters of future tractors has been proposed in the paper.
Material Properties and Applications
Mihaela MARIN、Florentina Potecașu、Elena DRUGESCU 等 5 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
This paper is a study of the influence of fluidized bed carburizing of sintered steels on the mechanical properties and the abrasive wear behavior for two different types of powder. Carburizing was carried out at a temperature of 900 °C and maintained for 20 minutes and 40 minutes, respectively. It was found that the…
Powder Metallurgy Techniques and MaterialsAdvanced materials and compositesMetal Alloys Wear and Properties
AYAD A. UTTAR、ALI S. ABED2012-12-01Journal of university of Anbar for pure science
In this study Ziegler – Natta catalyst was prepared which is a multi component catalytic system composed of, titaniumtetrachloride (TiCl4) as a active material, anhydrous magnesium chloride MgCl2 as support (carrier) which distribute the active material, ethyl benzoate EB as electron donor compound, and triethylalumin…
biodegradable polymer synthesis and propertiesOrganometallic Complex Synthesis and Catalysis
KHALEEL IBRAHIM ABDULLAH2012-12-01Journal of university of Anbar for pure science
The addition of phenol and effect of temperature and pH on the U.V. spectra of ortho, meta and para benzilnyledene aniline in ethanol as a solvent was studied. The thermodynamic parameters (G, H, S) were calculated in which the values of (G, H) are positive while the (S) is negative these support that the change…
Inorganic and Organometallic ChemistryThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure
Raisa Valdivé Lunar、Juan Carlos Osorio、Rafael Valdivé2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
The work presented shows the simulated values of the temperatures experimentally un-dertaken in [1] and [11] during friction stir welding (FSW) of AA 1100-0 aluminum plates. This is done using the finite element method (FEM). We studied the behavior of temperature by applying MEF to the heat transfer equation used by…
Advanced ceramic materials synthesisAdvanced Welding Techniques Analysis
Aurimas Ralys、Valdemar Prokopovič、Vytautas Striška2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
The article reviews techniques for preparing clean surfaces used in the manufacturing process, considers the types of clean surfaces and their role in modern production and provides the classification methods of arranging such surfaces. The paper also discusses the principles of methods for solvent cleaning, aqueous c…
Mechanical and Thermal Properties AnalysisUltrasound and Cavitation PhenomenaErosion and Abrasive Machining
K. Belaroui、M. N. Pons2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
The aim of our work is to establish a morphological characterization of particles. The particle size analysis determines the size distribution of a population of particles using a laser granulometer device. The evolution of particle size distributions is complemented by a study on the particle shape. Thus, morphologic…
Crystallization and Solubility StudiesCoagulation and Flocculation StudiesPoint processes and geometric inequalities
A. A. Valishin、Stepanova Ts2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
This article is dedicated to accumulation of local defects in the zone of forced elasticity before the front of a failure crack in polymers. The mechanism of microcavity formation in the crack and the mechanism of the break-up of loose junctions in the support framework were described. The kinetic equation of the brea…
Engineering Diagnostics and ReliabilityMaterial Properties and Failure MechanismsPolymer Science and Applications
G.V. Colibaba、Kolibaba, G.V.、Колибаба, Г.В. 等 9 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Features of the growth of ZnO single crystals by chemical vapor transport with the use of H2, HCl, H2 HCl mixture, and CO as transport agents and dopant sources are discussed in the present paper. Based on the investigation of electrical, luminescent, and optical properties of these samples with various doping level,…
ZnO doping and propertiesAdvanced Semiconductor Detectors and MaterialsChalcogenide Semiconductor Thin Films
Azam A、Ahmed AS、Oves M 等 6 位作者2012-12-01DOAJ (DOAJ: Directory of Open Access Journals)
Ameer Azam,1,2 Arham S Ahmed,2 Mohammad Oves,3 Mohammad S Khan,3 Sami S Habib,1 Adnan Memic11Centre of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia; 2Centre of Excellence in Materials Science (Nanomaterials), 3Department of Agricultural Microbiology, Aligarh Muslim University, Aligarh, IndiaBackgrou…
Copper-based nanomaterials and applicationsMagnesium Oxide Properties and ApplicationsNanoparticles: synthesis and applications