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  • 1
    Electronic Resource
    Electronic Resource
    Effect of dietary protein and lipid levels on growth and body composition of juvenile turbot (Scophthalmus maximus L) reared under optimum salinity and temperature conditions (2005)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture nutrition 11 (2005), S. 0 
    Details
    ISSN: 1365-2095
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Effect of dietary protein and lipid levels on growth and body composition of juvenile turbot was determined at optimum salinity and temperature conditions of 17 g L−1 and 19.2 °C, respectively, by using 3 × 2 (protein levels: 550, 600 and 650 g kg−1; lipid levels: 69 and 168 g kg−1) factorial design with three replications of each. Fish were hand-fed to satiety twice daily throughout the feeding trial. Weight gain and specific growth rate of fish were significantly (P 〈 0.05) increased with increased dietary lipid level, but not by dietary protein level. Daily feed intake was significantly (P 〈 0.05) affected by both dietary protein and lipid levels. Feed efficiency ratio and protein efficiency ratio were significantly (P 〈 0.05) affected by dietary lipid level, but not by dietary protein level. Moisture content of whole body was significantly (P 〈 0.05) affected by dietary lipid level, but not by dietary protein level. Crude lipid content of whole body was significantly (P 〈 0.05) affected by dietary lipid level, but not by dietary protein level. Significantly higher 20:5n−3, 22:6n−3 and n−3 highly unsaturated fatty acids were observed in turbot fed the low lipid diet than fish fed the high lipid diet in all protein levels, but significantly lower 18:2n−6 was observed in fish fed the former compared with the latter. In considering results of growth, specific growth rate and efficiency of feed, optimum dietary protein and lipid levels for juvenile turbot seemed to be 550 and 168 g kg−1 of the diet, respectively, under optimum salinity and temperature conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2095.2005.00338.x
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  • 2
    Electronic Resource
    Electronic Resource
    Tribological Behavior and Surface Chemistry Characteristics of Quasicrystal Coatings (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 124-126 (June 2007), p. 1541-1544 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The aim of this study was to investigate the effects of air plasma spraying processparameters on the tribological behavior and surface characteristics of quasicrystal coatings. For thispurpose, the response surface method (RSM), one of the designs of experiment (DOE) was utilized tosystematically investigate the combined effects of each process parameters. The RSM analysisrevealed that the superior tribological performance of quasicrystal coatings was obtained by theoptimized condition of specific micro-hardness and porosity level. It was specially quoted that therelatively low hardness of quasicrystal coatings caused the improvement of abrasive wear resistanceduring the current investigation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.1541.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Forging Process of Wrought Aluminum Alloy with Controlled Solid Fraction by Electromagnetic Stirring (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 277-282 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: This study demonstrates the indirect rheoforging of wrought aluminum alloys fabricatedby electromagnetic stirring (EMS). EMS was carried out by varying pouring temperature oftheological material and subsequently the rheo-material was forged into the sample which consistedof the direct and indirect forging part, by varying the applied forging pressure. The rheo-materialcompletely filled the die cavity at the applied forging pressure of 150 MPa. To transfer thedensification pressure to the end of the part, the applied forging pressure of over 170 MPa wasnecessary. To control liquid segregation, solid and liquid phases distribute uniformly by derivingthe laminar flow. When liquid segregation occurred significantly during rheoforging, the strengthrevealed as low as 268 MPa. Investigating relationship between microstructural features andmechanical properties of the product, the rheoforged material through EMS revealed the fine andglobular microstructure. Microstructure with uniform distribution of solid and liquid phase (nosegregation) showed good mechanical property of the rheoforged material whose tensile strengthwas 341 MPa for Al6061
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.277.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Fabrication of Rheological Material of A356 Aluminum Alloy by Electromagnetic Stirring through Vacuum Pump (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 731-736 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: This study demonstrates fabricating rheological material by EMS system attachedvacuum pump, in order to improve mechanical properties of rheoforged products by removingdefects such as porosity and oxides arising from rheological forging process. The billet fabricatedby EMS in vacuum pressure reduced formation of oxides and porosities of the inner material. Thebillet fabricated by EMS in vacuum pressure below 56 cm/Hg remarkably reduced porosities,comparing to the EMS in atmospheric pressure
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.731.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison between Tribological Characteristics of Al-Cu-Fe-B Quasicrystalline and Mo Coatings (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 715-718 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Al-Cu-Fe-B quasicrystalline and Mo coatings were obtained on the mild steel and brasssubstrates by thermal spraying routes for the purpose of replacement of Mo coatings withquasicrystalline ones. Quasicrystalline coatings were prepared by air plasma spraying and/or HVOF(High Velocity Oxygen Fuel) techniques followed by subsequent heat treatment, and Mo coatings,wire flame spraying. For comparative studies of important properties for industrial application,mechanical properties, bonding strength, surface energy, and tribological behavior were investigatedbased on microstructural characterization. Basic mechanical properties such as hardness, fracturetoughness, and elastic modulus of quasicrystalline coating showed comparable values with those ofMo coatings. De-bonding tests of coatings deposited onto brass substrate indicated that the bondingstrength of quasicrystalline coatings obtained by HVOF techniques exhibit higher value to Mocoatings. Non-sticking property analogized from surface energy calculation and friction coefficient ofquasicrystalline coatings also showed better performance during the tests. It is suggested from thisinvestigation that the quasicrystalline coating can be effectively used as a replacement of the Mocoating, which has shown a recent steep price rise and problems of accidental existence of minorenvironment harmful elements such as Cr6+, Pb, Cd, and Hg
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.715.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Permanent Mold Casting Practice and Microstructure and Mechanical Properties of Thin-Sectioned ADI Casting (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 531-534 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: For thin-walled casting development of austempered ductile iron (ADI), permanent moldcasting and accompanied heat treatment practice were systematically investigated to suppress and/orremove chill defects of ductile cast iron (DCI) with various thickness of 2 to 9 mm and to ensuremechanical properties of the final ADI casting. Si content was increased up to 3.8% to reduce the chillformation tendency under a high cooling rate. The residual Mg content remarkably affected thenodule count, while the nodule size and spherodization were proven to have weak relationships.Austenitizing process followed by austempering was very sensitive to chemical compositions (Si andSn) and heat treatment temperature. As a practical application, the steel bar coupler for a structuralframe was tried to produce without subsequent machining
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.531.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Optimization of Heat Treatment Parameters of Mo-Free High-Cr Cast Iron Mill Balls (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 913-916 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A Mo-free high-Cr cast iron with superior impact-wear resistance was tried to develop formill balls by alloy design and subsequent heat treatment. The Cr/C ratio was varied up to 7.7 in orderto minimize and eventually eliminate Mo addition, still ensuring hardenability. For the proper balancebetween abrasion resistance and toughness, the combined effects of each heat treatment parameterson the mechanical properties were systematically investigated using Taguchi method and responsesurface method (RSM), well recognized as powerful tools of the designs of experiments (DOE). Itwas found that hardness and impact energy were mainly affected by tempering and destabilizationconditions, respectively. It is noted that high impact energy of 5.2 J/cm2 was obtained withoutdeteriorating hardness (54 HRc) during the verification experiments under the heat treatmentcondition optimized by the DOE analyses
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.913.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Heat Treatment Processes of A2024 Rheoforging Alloy and Morphology Investigation by Nanoindentation and Atomic Force Microscopy (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 141-143 (July 2008), p. 385-390 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: This study demonstrated nanoindentation techniques of investigating the effects of sizeand feature in a microstructure on the mechanical properties of rheology-forged aluminum alloy.Mechanical properties and tribological characteristics of rheology-forged Al2024 wroughtaluminum alloy in terms of T6 heat treatment were investigated by varying the aging time bynanoindentation and nanoscratch techniques. By nanoindentation/nanoscratch tests and atomic forcemicroscopy, it was demonstrated that the 4 hour aged material exhibites the highest hardnessbecause of the intermediate precipitate phase θ″, which was precipitated by T6 heat treatment at495˚C. Moreover, the friction coefficients in the precipitates in the eutectic phase region were lowerthan those in the primary α phase region
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.385.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    A Perturbation Observer Based Robust Estimation Technique for Structural Monitoring and Control (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 120 (Feb. 2007), p. 241-246 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.120.241.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    The Effect of Crucible Configuration on Joule and Pinch Effects in EMCC Process of Silicon (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3179-3183 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: For the development of an economical production technology of multi-crystalline silicon,an EMCC (Electro Magnetic Continuous Casting) process using a segmented Cu cold crucible waspracticed. In order to enhance significantly the heating efficiency of silicon melt keeping non-contactcondition during continuous melting and casting processes, the effects of Joule heating andelectromagnetic pressure in molten silicon were optimized by systematically varying crucible designand configuration. Throughout the present investigation, multi-crystalline silicon ingot wassuccessfully produced at the casting speed of above 1.5 mm/min under a non-contact condition
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3179.pdf
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