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  • 1
    Electronic Resource
    Electronic Resource
    Mathematical Modeling of Microwave Thawing by the Modified Isotherm Migration Method (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 52 (1987), 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 mathematical model of microwave thawing of homogeneous food products is developed and solved numerically using the Modified Isotherm Migration Method. The model is used to predict thawing time and temperature profiles for microwave thawed meat cylinders at three frequencies (2450 MHz, 915 MHz, 300 MHz) and different power levels. Model and experimental results for thawing a lean beef cylinder heated at low microwave power using 2450 MHz frequency compare well. The advantage of using 915 or 300 MHz power over 2450 MHz power is shown by calculations. The results show that microwaves significantly accelerate the thawing rate. The mathematical model is explored as a tool for designing optimal microwave/convective heating protocols for rapidly thawing foods in desired temperature ranges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1987.tb06638.x
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  • 2
    Electronic Resource
    Electronic Resource
    Technology and deskilling: the case of five principal trade areas in New South Wales (1988)
    Oxford, UK : Blackwell Publishing Ltd
    New technology, work and employment 3 (1988), S. 0 
    Details
    ISSN: 1468-005X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Sociology , Economics
    Notes: This article summarises features of the current debate over whether new technology upgrades or downgrades skill and knowledge requirements and reports on how 1,700 tradespeople (craftspeople) interviewed in 1983–85 in NSW, substantially reported an upgrading effect.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-005X.1988.tb00088.x
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  • 3
    Electronic Resource
    Electronic Resource
    The Manchester Society, Manchester, UK (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Economic affairs 6 (1986), S. 0 
    Details
    ISSN: 1468-0270
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-0270.1986.tb01936.x
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of a methylase gene for erythromycin resistance within the sequence of a spontaneously deleting fragment of Corynebacterium diphtheriae plasmid pNG2 (1988)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 56 (1988), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A 9.6 Mda Corynebacterium diphtheriae plasmid, pNG2, mediates inducible resistance to erythromycin and other macrolide-lincosamide-streptogramin B (MLS) antibiotics. Spontaneous deletion of a 1.2 Mda fragment of pNG2 leaves the derivative plasmid incapable of conferring MLS-resistance on its host. The pNG2 region containing this fragment was sequenced as were the regions flanking it. The fragment contained 1606 bp, was flanked by almost perfect 23 bp inverted repeats, and appeared to be excised precisely. It contained an open reading frame encoding a leader protein plus a protein which was similar in its amino acid sequence to the rRNA methylases produced by other erythromycin-resistant, Gram-positive bacteria. The C. diphtheriae gene was named ermCd.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1988.tb03142.x
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  • 5
    Electronic Resource
    Electronic Resource
    The sulphation inhibitor sodium selenate arrests the growth of Dictyostelium discoideum (1985)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 30 (1985), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Sulphate incorporation into glycopeptides appears to be a key event in the development of a number of organisms. An inhibitor of sulphation, sodium selenate, has been used in this study to examine the possibility that sulphation has a comparable role in the development of Dictyostelium discoideum. At concentrations of 0.1 mM and 1.0 mM, exogenously supplied selenate reversibly arrested the growth of bacterially grown amoebae of D. discoideum. In contrast, the effect of selenate on development was minimal. In the presence of 1.0 mM selenate, aggregation and tip formation were delayed 2–3 h and aggregates were slightly smaller; exogenous 0.1 mM selenate had no visible effect on development. However, the possibility that starved amoebae are impermeable to selenate was not excluded. The vegetative growth and development of an axenic strain in the presence of selenate closely resembled that of the bacterially grown strain. Since an inhibitory effect of 1.0 mM selenate on [35S]sulphate incorporation into acetone precipitable protein was also demonstrated, these results suggest that sulphation is necessary for the growth of D. discoideum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1985.tb01109.x
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  • 6
    Electronic Resource
    Electronic Resource
    Validation of signature polarlipid fatty acid biomarkers for alkane-utilizing bacteria in soils and subsurface aquifer materials (1989)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 62 (1989), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Extractable cell membrane-derived polarlipid ester-linked fatty acids (PLFA) obtained from aerated soils gassed with methane or propane and from methane- and propane-oxidizing bacteria isolated from the soils were analyzed by capillary gas chromatography/mass spectrometry. Exposure of aerated soils to methane resulted in the formation of a high proportion of an unusual 18-carbon mono-unsaturated PLFA, 18:lw8c. High proportions of this fatty acid biomarker are found in monocultures from this soil grown in minimal media with methane. This PLFA has been previously established as associated with authentic type II methane-oxidizing bacteria. The microbiota in aerated soils exposed to hydrocarbons containing propane, formed a suite of PLFA characterized by high proportions of a 16-carbon mono-unsaturated acid, 16:lw6c, and an 18-carbon saturated fatty acid with an additional methyl branch at the 10 position, 10 Me 18:0. This PLFA pattern has been detected in several monocultures enriched from the soil with propane-amended minimal media. The correspondence of high proportions of these unusual mono-unsaturated PLFA in the isolated monocultures and in situ in the soils after stimulation with the appropriate hydrocarbon is a strong validation of the utility of these biomarkers in defining the community structure of the surface soil microbial community.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1989.tb03656.x
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Subprimal Fabrication and Packaging Methods on Palatability and Retail Caselife of Loin Steaks from Lean Beef (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), 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: Eighty subprimals were fabricated from 20 pairs of beef strip loins from lean (fat thickness, 0.2-0.4 cm) US Standard and US Good carcasses. Three vacuum packaged (VP) and one dry aged treatments were randomly assigned to short loin sections of each carcass. Steaks from VP intact and VP not-reassembled subprimals were rated highest in overall appearance and eating quality. Dry aging reduced retail caselife, produced greater shrinkage and trim losses and lower overall satisfaction ratings by panelists. Precutting subprimals into steaks followed by VP aging tends to decrease retail caselife (especially if steaks are reassembled) and decrease juiciness and tenderness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10529.x
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  • 8
    Electronic Resource
    Electronic Resource
    Isolation and Heat Stability of Trypsin Inhibitors in Amaranth (Amaranthus hypochondriacus) (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), 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: Trypsin inhibitors were isolated from seeds of Amaranthus hypochondriacus by extraction at pH 7.5, heat treatment at 70°C for 15 min and affinity chromatography with trypsin-Sepharose 4B. Inhibitors of trypsin and chymotrypsin were identified in polyacrylamide gels following electrophoresis using a stain procedure that employed the chromogenic substrate acetyl-D, L-phenylalanine-2-napthyl ester. Three of the thirteen trypsin inhibitors identified in the electrophoresis gels, also had antichymotryptic activity. The inhibitor preparation was very thermostable retaining 20% of its original activity after 7 hr at 100°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10523.x
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  • 9
    Electronic Resource
    Electronic Resource
    Headspace Sulfur Dioxide and the Storage of Dried Apples (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), 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 gas chromatographic technique was used to determine sulfur dioxide and carbon dioxide in the headspace of packaged apples during storage. The headspace sulfur dioxide so determined decreased more rapidly and correlated better with nonenzymatic browning of the apples than free or total sulfur dioxide. The decrease in headspace sulfur dioxide, which was not accompanied by a comparable decrease in free sulfur dioxide, was attributed to the binding of sulfite to organic components of the apple. Free sulfur dioxide was found to measure not just the inorganic sulfite, which is commonly assumed, but also bound sulfite which was rapidly released under the acid conditions. Neither free nor total sulfur dioxide in a product could be quantitatively determined from headspace gas chromatographic techniques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb10556.x
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  • 10
    Electronic Resource
    Electronic Resource
    Color, Doneness and Soluble Protein Characteristics of Dry Roasted Beef Semitendinosus (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 51 (1986), 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: Subjective color and doneness profiles, objective color measurements and compositional changes in water and low-salt extractable protein fractions of beef semitendinosus roasts cooked to 60°C, 68°C, and 75°C internal temperature (IT) were evaluated. Sensory color scores showed higher significant correlations with IT than objective color measurements. Extractable biuret positive ratio (EBPR) and coagulation test values had the highest significant correlations with IT compared to related water and saline-extractable protein parameters. Intensity profiles of isoelectrofocused water-extractable protein aliquots indicated that proteins with pI 3–10 decreased as IT increased. Proteins with pI 6.2–8.0 also accounted for an increase in percent of the total protein extracted as IT increased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1986.tb10827.x
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