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  • 1
    Electronic Resource
    Electronic Resource
    A new method for measuring time constants of a thermocouple wire in varying flow states (1996)
    Springer
    Experiments in fluids 21 (1996), S. 380-386 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A new measuring method is suggested for determining the time constant of a thermocouple wire to be applied for the measurement of the true fluid temperatures in varying flow states. Based on the techniques of internal heating which are commonly used to measure mean time constants, we extend the existing method to measure instantaneous time constants continuously. A method of measurement and analysis is presented and verified experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00189059
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of a Combined Process of High-Pressure Carbon Dioxide and High Hydrostatic Pressure on the Quality of Carrot Juice (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), 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: : A combined treatment of high-pressure carbon dioxide (HPCD) and high hydrostatic pressure (HHP) was investigated as a non-thermal processing technique to enhance the safety and shelf life of carrot juice. Aerobes were completely inactivated by a combined treatment of 4.90 MPa-HPCD and 300 MPa-HHP. A combined treatment of 4.90 MPa-HPCD and 600 MPa-HHP effectively inactivated enzymes. The residual activities of polyphenoloxidase, lipoxygenase, and pectinmethylesterase were less than 11.3%, 8.8%, and 35.1%, respectively. Cloud and color were considerably affected by HPCD, but not by HHP. Enzyme activities and the total color difference showed a strong correlation with pH, which was dependent on the pressure of carbon dioxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2002.tb08730.x
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  • 3
    Electronic Resource
    Electronic Resource
    Inactivation Kinetics of Food Poisoning Microorganisms by Carbon Dioxide and High Hydrostatic Pressure (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), 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: The inactivation kinetics of food poisoning microorganisms using a combined treatment of carbon dioxide (CO2) with high hydrostatic pressure (HHP) was investigated. Staphylococcus aureus, Fusarium oxysporum, and Fusarium sporotrichioides were totally inactivated by a combined treatment of carbonation and HHP at 500 MPa. Bacillus subtilis, a spore forming bacteria, were not completely inactivated after the combined treatment. The microorganisms treated by carbonation and HHP were exponentially reduced in a pressure range and the Dp -value, the Zp-value, and the activation volume were determined. UV absorbing materials leaked from injured cells. Morphological changes of the cells were observed by scanning and transmission electron microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb08273.x
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of Combined Treatment of High Hydrostatic Pressure and Mild Heat on the Quality of Carrot Juice (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 66 (2001), 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: : This study was performed to investigate the effects of the combined treatment of high pressure and heat on the quality of carrot juice, and to optimize the process condition. About 95% of food quality-related enzymes were lost at 400 MPa and 70 °C, for 10 min, while α- and β-carotene were relatively stable at the combined process. The optimum process condition was estimated at 395 to 445 MPa, 70 °C, for 8 to 11 min. These results indicate that the combined treatment of high pressure and mild heat could be used as an effective process for production of high-quality carrot juice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2001.tb15214.x
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  • 5
    Electronic Resource
    Electronic Resource
    Further studies on Pseudomonas aeruginosa LasA: analysis of specificity (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 6 (1992), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Full elastolytic activity in Pseudomonas aeruginosa is a result of the combined activities of elastase, alkaline proteinase, and the lasA gene product, LasA. The results of this study demonstrate that an active fragment of the LasA protein which is isolated from the culture supernatant fraction is capable of degrading elastin in the absence of elastase, thus showing that LasA is a second elastase produced by this organism. In addition, it is shown that LasA-mediated enhancement of elastotysis results from the separate activities of LasA and elastase upon elastin. The LasA protein does not affect the secretion or activation of a proelastase as previously proposed in other studies. Furthermore, LasA has specific proteolytic capability, as demonstrated by its ability to cleave β-casein. Preliminary analysis of β-casein cleavage in the presence of various protease inhibitors suggests that LasA may be classified as a modified serine protease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1992.tb01554.x
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  • 6
    Electronic Resource
    Electronic Resource
    Rotational magnetic measurements of vortex pinning in polycrystalline superconductors (abstract) : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 5879-5879 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetization-vector measurements were made at various temperatures on polycrystalline disks of YBa2Cu3O7 and (Ba,K)BiO3 as each was rotated about its axis in a fixed field H along the disk plane. For hysteretic starting states, the vortex flux density vector B is found to bifurcate into a BR component that rotates rigidly with the sample and a BF component that stays at a fixed angle (θF) relative to H, thus turning frictionally relative to the sample, as seen earlier. With increasing H, BR decreases and BF increases in size, indicating a distribution in the strength of the vortex pinning torques. After BR has vanished, the frictional angle θF decreases rapidly. Thus, the quantity Hμ sin θF (μ being the quantized vortex moment), which equals the average pinning torque (τp) on each vortex, does not remain constant but diminishes with increasing H. This decrease of τp is consistent with the collective pinning phenomenon known as vortex bundling. At fixed H, τp diminishes rapidly with increasing temperature, reaching very low values well below Tc. These results are compared with those derived from critical-state model interpretations of conventional hysteresis loop data. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362159
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  • 7
    Electronic Resource
    Electronic Resource
    Marker-assisted selection of common beans for resistance to common bacterial blight: efficacy and economics (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 119 (2000), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The possibility of using random amplified polymorphic DNA (RAPD) markers previously mapped in the common bean PC50/XANI59 population to select for resistance to common bacterial blight (CBB) in different populations was examined. Two out of 02 selected RAPD markers were polymorphic in HR56 and W0633d, the parental lines used in this experiment. Cosegregation analysis of the two polymorphic markers and disease reaction in a recombinant inbred (RI) population derived from HR67/W1744d confirmed that one of the two RAPD markers, BC420900, was significantly associated with a major quantitative trait locus-conditioning resistance to CBB in HR67. This locus accounted for approximately 51) of the phenotypic variation. The RAPD marker was transformed into a sequence characterized amplified region (SCAR) marker and used for selection in a different population derived from ‘Envoy’/HR67. Prediction for resistance to CBB with the BC420.990 SCAR marker was 94.2% accurate in this population. A comparison between marker-assisted selection (MAS) and conventional greenhouse screening showed that the cost of MAS is about one-third less than that of the greenhouse test.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2000.00514.x
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  • 8
    Electronic Resource
    Electronic Resource
    Schematic frictional model for interacting vortices in an isotropic superconducting plate (abstract) : The 6th joint magnetism and magnetic materials (MMM)-intermag conference (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 6965-6965 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In the simple model proposed, repulsive intervortex forces are balanced by containing forces produced by the external field (H) and by frictional forces representing the effects of pinning on displaced vortices. For the field-cooled (FC) state, whose vortex density is presumably uniform, the empirical fact that the average flux density (B¯) in nearly equal to H yields an operational inverse-square dependence of the intervortex force on the intervortex spacing. For both the FC and zero-field-cooled (ZFC) states, expressions are derived for B¯ vs H (including the remanences at H=0) and for the profiles of B across the sample thickness. Calculations of these properties are compared with experiment and with the macroscopically related critical-state model, revealing again that the pinning forces are strongly dependent on H. The frictional interacting-vortex model is also used in deriving the critical current as a transport property of the FC and ZFC states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358058
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  • 9
    Electronic Resource
    Electronic Resource
    Vortex flux creep and magnetic hysteresis in a type-II superconductor (abstract) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6343-6343 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Upon reversal of the external magnetic field H during any hysteretic cycling of a type-II superconductor in its vortex state, the rate at which the magnetic flux density B varies with H is typically seen to start from zero and then change gradually. Measurements have now been made of the time dependence of B (the vortex flux creep) at many fixed-H points on several hysteresis loops of a grain-oriented YBa2Cu3O7 sample at 4.2 K (with H and B along the c axis), and it is observed that the size of the logarithmic dB/dt drops abruptly to zero, before proceeding to change in sign, whenever H is reversed. This curious similarity between the hysteretic behavior of dB/dt at fixed H and that of the nearly instantaneously measured dB/dH can be understood qualitatively in terms of the vortex pinning. As rotational magnetization measurements have recently shown,1 the unpinning and repinning of moving vortices is manifested macroscopically as a frictional process. Thus, the reversal of vortex motion involves the reversal of frictional forces, during which the vortex population in the superconducting sample (which is proportional to B) does not change with time or field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355394
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  • 10
    Electronic Resource
    Electronic Resource
    Independently addressable subarrays of silicon microdischarge devices: Electrical characteristics of large (30×30) arrays and excitation of a phosphor (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2100-2102 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Large arrays (up to 30×30) of microdischarge devices having separately addressable subarrays have been fabricated in Si and operated continuously in Ne, Ne/Ar, and Ne/Xe gas mixtures at pressures up to 800 Torr. Eight 3×3 arrays fabricated on the same substrate operate simultaneously at voltages as low as 210 V in 400 Torr of Ne and exhibit lifetimes beyond 19 h, or approximately 1 order of magnitude larger than those for earlier arrays in which all devices have a common anode. Four 15×15 arrays have also been tested and, when operated in Ne/Ar or Ne/10% Xe gas mixtures, generate intense fluorescence in the green from a phosphor over an area of 16 mm2. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1401791
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