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  • 1
    Digitale Medien
    Digitale Medien
    Effects of Alkaline Protease in Minced Fish on Texture of Heat-Processed Gels (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 46 (1981), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Measurements of properties relating to the physical integrity of heat-processed fish gels varied among samples obtained over a 1-yr period or subjected to various processing temperatures. Such gel properties correlated well with the heat-stable protease (alkaline protease) activity measured in the raw samples. A significant inhibitor concentration-dependent relationship was noted between the addition of a potato derived protease inhibitor and gel strength. These observations support the causative role of an erzymic proteolytic agent in the weakening of gel integrity at processing temperatures near 60°C.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1981.tb04451.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Variations in Proximate Composition of North Carolina Scallop Meats (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 34 (1969), S. 0 
    Details
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: SUMMARY: Bay scallops (Aequipecten irradians), calico scallops (Aequipecten gibbus) and sea scallops (Placopecten magellanicus) were sampled from known locations and months of harvest for determination of proximate composition. A scallop sample (Chlamys hericius) was obtained from near Whidbey Island, Puget Sound, for comparative purposes. The adductor muscles were analyzed for total moisture, protein, fat, glycogen and ash content. The proximate composition varied widely among locations and months of harvesting. In general, coefficients of variation were relatively low for moisture and protein but high for fat, glycogen and ash. The range for each component was fairly similar among species studied. The percent ranges for bay and calico scallop meats, respectively, were: moisture 74.15–83.66, 76.12–81.86; protein 13.44–21.57, 13.28–17.53; fat 0.23–0.91, 0.23–1.13; glycogen 0.13–3.86, 0.35–3.71 and ash 1.09–2.24, 1.17–1.91. Sea scallop percent ranges were: moisture 74.63–80.97; protein 13.87–18.11; fat 0.31–0.96; glycogen 0.27–8.74 and ash 1.28–1.81.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2621.1969.tb12061.x
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Laminar radial flow electrochemical reactors. III. Electroorganic sysnthesis (1989)
    Springer
    Journal of applied electrochemistry 19 (1989), S. 856-867 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract This paper investigates the performance and design of three laminar radial flow electrochemical cells (the capillary gap cell, stationary discs; the rotating electrolyzer, co-rotational discs; the pump cell, one disc rotating and the other stationary). Modeling of a competing electrosynthesis pathway is described — the methoxylation of furan. The model developed incorporates convective, diffusive and migrative influences with three homogeneous and two electrodic reactions. Two sizes of reactors are considered and the performance of the different reactor types analyzed as a function of size. The superiority of the rotational cells is illustrated for this reaction scheme compared to both the capillary gap cell (CG) and a parallel plate reactor (PPER). Scale-up criteria are scrutinized and two approaches to laminar radial flow reactor scale-up are investigated. The one suggested herein shows that Taylor number, residence time,IR drop and rotational Reynolds number must all be accounted for even with a fairly simple electrosynthesis pathway. A quantitative evaluation of this scale-up procedure is included.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01007933
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  • 4
    Digitale Medien
    Digitale Medien
    Laminar radial flow electrochemical reactors. II. Convective diffusion of inert tracer (1989)
    Springer
    Journal of applied electrochemistry 19 (1989), S. 845-855 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract Mixing is investigated in three laminar radial flow cells (capillary gap cell (stationary discs), pump cell (one disc spinning) and the rotating electrolyser (co-rotating discs)) using numerical and semianalytical methods for inert tracer transport. Results are compared to existing data. Mixing in the three cells is modelled using finite element techniques applied to convection-dominated inert tracer transport. For the capillary gap cell modes of tracer tagging and detection are commented on with respect to which type provides the correct representation of the residence time distribution. The extent of cross-gap communication, from anode to cathode, is quantified and compared to that observed in the other radial cell designs. Two semi-analytical solutions (convection only, Taylor diffusion) are derived for inert tracer transport in this configuration and are compared to the detailed numerical results. Convection only is relevant fort d/t c ratios of greater than 100 and the Taylor diffusion model applies fort d/t c ratios of about 0.10 and only beyond a critical radius defined herein. Pump cell (PC) mixing is modelled using finite element techniques for the tracer, the velocity field being provided by a semi-analytical solution. Mixing is quantified in this cell and cross-gap communication evaluated. The large axial velocities provide for significant cross-gap mixing. The rotating electrolyser is modelled and the efficiency of separation of catholyte/anolyte streams is observed to be determined by Taylor number (Taylor number (α) — ratio of half-gap width divided by theoretical boundary layer thickness). The superiority of separation in this cell is quantified by definition of the zeroth wall moment and comparison with the other two radial cells. For the example modelled, cross-gap communication was less than half that of the other cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01007932
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  • 5
    Digitale Medien
    Digitale Medien
    Laminar radial flow electrochemical reactors. I. Flow fields (1988)
    Springer
    Journal of applied electrochemistry 18 (1988), S. 768-780 
    Details
    ISSN: 1572-8838
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: Abstract The velocity fields of three laminar radial flow electrochemical reactors are modeled using numerical and semi-analytical techniques. The capillary gap cell configuration is modeled using Galerkin finite element (GFEM) analysis and the asymptotic form of its velocities presented. An approximate asymptotic expression for entry length is also derived and compared to predicted entry lengths from the GFEM. Qualitative agreement is achieved. Two areas of flow separation are observed, their location being a function of gap width, flow Reynolds number (Re) and inlet pipe diameter. The rotating electrolyzer (REL) flow field is also simulated with the GFEM model. The insensitivity of the REL radial velocity profiles as a function of flow rate is shown. The shape of the radial velocity profiles and the degree of separation of the radial velocity jets are shown to be determined by the Taylor number (being the ratio of half-gap width over the theoretical boundary layer thickness). The asymptotic entry length solution is shown to provide a better estimate for this cell than for the capillary gap cell. Unlike the previous cells the pump cell shows less asymptotic behavior and is therefore more difficult to simulate. The GFEM approach is usually too costly for this cell and therefore perturbation techniques are applied. The resulting semi-analytical solution adequately represents laminar pump cell velocity profiles over a broad range of parameter values and is very short and easy to implement. One high Taylor number simulation is performed using the GFEM and the previously reported decoupling of electrodic mass transfer is interpreted via velocity profiles.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01016906
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