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  • 2005-2009  (8)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    The Effects of Irradiation at 1.6 kGy on Quality Characteristics of Commercially Produced Ham and Pork Frankfurters over Extended Storage (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 70 (2005), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Commercially produced sliced ham and all-pork frankfurters were obtained from a national meat processor and irradiated at 1.6 kGy. The samples were evaluated for color, lipid oxidation, odor, flavor, and the production of volatiles over an 8-wk storage period. Irradiation processing did not affect color values for the ham or frankfurters. Lipid oxidation as measured by 2-thiobarbituric acid-reactive substances (TBARS) did not increase for either the ham or frankfurters. Irradiation processing increased off-odor scores for the ham but not for frankfurters. On the other hand, off-flavor scores were not significantly different for ham but were higher in frankfurters after irradiation processing. Dimethyl disulfide content increased as a result of irradiation in both the ham and frankfurters but decreased during the 8-week storage period. Irradiation processing resulted in the formation of new volatile compounds in the ham samples including heptane, trans-1-butyl-2-methylcyclopropanone, 2-octene, and toluene, which were not present in nonirradiated ham. In the case of frankfurters, irradiation treatment resulted in the formation of 2-butanone, which was not present in the nonirradiated frankfurters. Most volatile compounds that were affected by irradiation processing of either the ham or frankfurters were increased when compared with nonirradiated controls. Although color and lipid oxidation (TBARS) did not seem to be affected by irradiation processing at 1.6 kGy, changes in odor, flavor, and the production of volatiles are of concern if irradiation is to be used to control microbial growth in ready-to-eat pork products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2005.tb07200.x
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  • 2
    Electronic Resource
    Electronic Resource
    Irradiation-induced Cured Ham Color Fading and Regeneration (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 70 (2005), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : Color stability of cured ham as a result of irradiation, packaging atmosphere, and storage time was evaluated. Sliced cured ham was packaged in aerobic or vacuum atmospheres, irradiated at 0, 1.2, 2.3, and 4.5 kGy and stored for 0 and 7 d. The ham treatments were evaluated for cured color, oxidation-reduction potential, and residual nitrite content. Irradiation decreased cured color as irradiation dose increased from 0 to 4.5 kGy as evidenced by lower a*/b* ratios and cured pigment analysis regardless of packaging atmosphere. Residual nitrite levels were also lower for the 4.5-kGy treatment compared with nonirradiated control following irradiation. Cured color was regenerated over time and resulted in higher a*/b* ratios on day 7 compared with day 0 for the 4.5-kGy treatment. Oxidation-reduction potential was decreased on day 0 and day 7 for the vacuum-packaged treatment that was irradiated at 4.5 kGy compared with the 0-kGy treatment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2005.tb07174.x
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  • 3
    Electronic Resource
    Electronic Resource
    Die Design of a Back Panel for a PDP TV Using 3-D Elasto-Plastic Finite Element Analysis (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 322-327 
    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: The objective of this research work is to design optimally dies and the blank sheet formanufacturing of the back panel of a PDP TV. The influence of design parameters of the dies and theblank sheet on the formation of wrinkling in the upper trimming area of the stamped part has beenquantitatively investigated through three-dimensional elasto-plastic finite element analysis. Thecorner radius of the upper trimming area of the die and the blank gap, which is the distance from theouter line of the blank holder to that of the blank, have been chosen as design parameters to removewrinkling associated with a stamping part in a upper trimming area. From the results of the analyses, ithas been shown that a product without wrinkles and skid lines can be manufactured when the cornerradius is 8 mm and the blank gap is 60 mm. Several stamping tests have been performed using themanufactured die set and the blank sheet according to the proposed optimum design. From the resultsof the stamping tests, it has been shown that a back panel of the PDP TV can be successfullymanufactured using the proposed optimum design condition
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.322.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Oxidation Behavior and Cutting Performance between Ti〈sub〉0.75〈/sub〉-Al〈sub〉0.25〈/sub〉-N and Ti〈sub〉0.69〈/sub〉-Al〈sub〉0.23〈/sub〉-Si〈sub〉0.08〈/sub〉-N Coated Tool through Measurement of Cutting Temperature (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 569 (Jan. 2008), p. 141-144 
    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: Ti-Al-Si-N and Ti-Al-N coatings were deposited on WC-Co substrates by a DC magnetronsputtering method. The oxidation behavior of two kinds of Ti0.75Al0.25N and Ti0.69Al0.23Si0.08Ncoatings were comparatively investigated by XRD patterns and GDOES depth profiles. Si addition of8 at.% into Ti-Al-N film modified its microstructure to a fine composite comprising, Ti-Al-Ncrystallites and amorphous Si3N4, and to a smoother surface morphology. While the solid solutionTi0.75Al0.25N film had superior oxidation resistance up to around 700°C, the composite Ti-Al-Si-Nfilm showed further enhanced oxidation resistance. Both Al2O3 and SiO2 layers played roles as abarrier against oxygen diffusion for the quaternary Ti-Al-Si-N film, whereas only the Al2O3 oxidelayer formed at surface did a role for the Ti-Al-N film. The cutting performances of two coatedcarbide ball-end mills were evaluated by cutting of AISI D2 cold-worked die steel (60 HRC) underhigh-speed cutting condition. The tool wear and cutting temperature are discussed along with coatingcharacteristics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.141.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    The Effect of Substrate Surface Characteristics on AIP PVD Coating of Cemented Carbide Inserts and Their Cutting Performance (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 534-536 (Jan. 2007), p. 1241-1244 
    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: The effects of substrate surface treatment on TiAlN PVD coating on submicron cementedcarbide was investigated. Surface roughness and morphology were improved by physical treatmentsuch as micro blasting, brush lapping and plasma etching with decreased Co content in the surfacelayer. The Co content in the surface does not seem to affect coating adhesion or the qualityconsiderably. The smoother surface induced by the surface treatment improved TiAlN adhesion andsurface roughness. The insert treated by blasting and lapping before coating showed a better cuttingperformance than those with ultrasonic treatment. It was concluded that the substrate surfacecharacteristics are closely related to the performance of the TiAlN coated inserts
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.1241.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of Process Parameters on Surface Characteristics in Cutting of Cold Rolled Steel Sheets Using a High-Power CW Nd: YAG Laser (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 580-582 (June 2008), p. 455-458 
    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: The objective of the present paper is to examine the effects of process parameters, suchas laser power, cutting speed of the laser and thickness of the workpiece, on characteristics of thecut section in the cutting of cold rolled steel sheets using a high-power Nd:YAG laser with acontinuous wave (CW). From the results of the experiments, the influence of the process parameterson surface roughness and average striation angle has been quantitatively investigated. In addition,critical cutting speeds with a minimum surface roughness and a maximum average striation anglehas been obtained. Finally, the optimum cutting conditions for each workpiece thickness have beenestimated to improve both the quality of the cut section and the cutting efficiency
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.580-582.455.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Evaluation of RGD-Grafted Porous PLLA Scaffold for Chondrogenic Differentiation of Stem Cells (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 297-300 
    Details
    ISSN: 1013-9826
    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: Biodegradable porous poly(L-lactic acid) (PLLA) scaffolds were prepared using gasfoaming method. The PLLA scaffolds with a hydrophobic surface were subjected to Ar plasmatreatment and in situ acrylic acid (AA) grafting to obtain hydrophilic PLLA scaffold (PLLA-PAA).Cell-adhesive RGD peptide was then immobilized onto the AA-grafted PLLA (PLLA-PAA-RGD).Once rabbit bone marrow-derived mesenchymal stem cells (BM-MSC) were isolated, MSCs wereseeded into PLLA control, PLLA-PAA, and PLLA-PAA-RGD scaffold and cultured for up to 4weeks in chondrogenic medium with the addition of 10 ng/ml transforming growth factor (TGF)-β1.Surface analysis of AA-grafted PLLA identified significant alterations of surface characteristics,including reduced contact angle and different atomic compositions. From WST-1 assay at 4 weeks,cells were found more proliferative in PLLA-PAA than the others. Upon the histological analysis ofSafranin O staining, chondrogenic differentiation of MSCs appeared to be progressed more activelyin PLLA-PAA. The effect of RGD immobilization on MSC differentiation was barely notable
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.297.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Investigation into Thermal Characteristics in Cutting of a Low Carbon Sheet Using a High-Power CW Nd:YAG Laser for Net Shape Manufacturing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 344 (July 2007), p. 169-176 
    Details
    ISSN: 1013-9826
    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: The objective of this paper is to investigate the influence of process parameters onkerfwidth and the melted area in sharp corners for cutting of a low carbon (CSP 1N) sheet using a highpower Nd:YAG laser with a continuous wave for net shape manufacturing. In order to investigate theeffects of the power of laser, the cutting speed of the laser and the thickness of the material on thekerfwidth, several linear cutting tests have been carried out. From the results of experiments, therelationship between the effective heat input and kerfwidth has been obtained. In addition, it has beenshown that the kerfwidth ranges from 0.47 mm to 0.79 mm. In order to investigate the influence of thecorner angle and size of the loop on the melted area in sharp corners for each cutting condition,angular cutting tests and loop cutting tests have been performed. From the results of angular cuttingtests, the relationship between the corner angle and the melted area has been obtained and it has beenfound that the melted area is nearly zero at the corner angle of 150 o. Through the results of loopcutting experiments, the relationship between the corner angles on the melted area in the corneraccording to the size of the loop has been obtained. In addition, a proper size of loop for each cornerangle has been obtained. The above empirical results have been applied in the development of aknowledge-based path generation program for laser cutting with algorithms of the offset generationand the path modification
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.344.169.pdf
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