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  • Elsevier  (271)
  • Blackwell Publishing Ltd  (39)
  • Oxford University Press  (21)
  • American Geophysical Union  (20)
  • International Union of Crystallography (IUCr)  (15)
  • De Gruyter
  • Ovid Technologies
  • 2005-2009
  • 1990-1994  (197)
  • 1985-1989
  • 1980-1984  (103)
  • 1975-1979  (70)
  • 1950-1954
  • 1991  (197)
  • 1983  (103)
  • 1975  (70)
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  • 2005-2009
  • 1990-1994  (197)
  • 1985-1989
  • 1980-1984  (103)
  • 1975-1979  (70)
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  • 11
    Electronic Resource
    Electronic Resource
    Variations in the Carcinogenicity of Tremolite Dust Samples of Differing Morphology (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 643 (1991), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1991.tb24497.x
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  • 12
    Electronic Resource
    Electronic Resource
    Impact of the Proposed Qattara Reservoir on the Moghra Aquifer of Northwestern Egypt (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 29 (1991), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: This paper examines hydrogeologie effects of proposed diversion of water from the Mediterranean Sea to the Qattara Depression for generation of electricity in northwestern Egypt. The Lower Miocene Moghra aquifer directly underlies the Qattara Depression, extending to the east and dipping beneath younger formations to the north. The Qattara Depression is a sink for ground-water flow from the Nile Delta aquifer in the east, the Mediterranean Sea in the north, and the Nubian artesian aquifer in the south. In this study, a two-dimensional finite-difference model was used in conjunction with available meteorologie, geologic, and hydrologie data to characterize the present ground-water conditions in this aquifer and to make predictions about the water-table rise which could occur as a result of the proposed Qattara Reservoir. Model predictions indicate that creation of the reservoir could cause a 30-meter rise of the Moghra aquifer's water table in the central part of the Qattara Depression. This water-table rise decreases to the north and east. Transient simulations indicate that steady-state conditions in the modeled area of the Moghra aquifer are not likely to be reached during the expected 100-year lifetime of the reservoir.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1991.tb00515.x
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  • 13
    Electronic Resource
    Electronic Resource
    REPLY TO the preceding Discussion by I. V. Zelenin of “Prospect Risk Analysis Applied to Ground-Water Reservoir Evaluation” (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 21 (1983), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1983.tb00757.x
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  • 14
    Electronic Resource
    Electronic Resource
    INNOVATION WITHOUT CHANGE: THE CONTRADICTION BETWEEN THEORIES-ESPOUSED AND THEORIES-IN-USE (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of management studies 28 (1991), S. 0 
    Details
    ISSN: 1467-6486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The reforms in many of the socialist countries have caused enterprises to re-evaluate their structures to adapt to a more turbulent environment. In one industry, the canned and fresh fruit and vegetable industry in Poland, managers created a new association designed to serve the industry through long-range planning and analysis of the environment. Managers from 30 enterprises in this industry were surveyed. Counter to the design of the association, managers used the association for short-term problem solving. This study further reveals that managers believe the association should operate in this fashion. This reflects the industry's general failure to make use of the innovation and to adapt to change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-6486.1991.tb00284.x
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  • 15
    Electronic Resource
    Electronic Resource
    Responses of stomata of senescing and nonsenescing leaves of Nicotians glauca to changes in intercellular concentrations of leaf carbon dioxide (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 14 (1991), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Gas exchange measurements were performed to test the hypothesis that failure of stomata to open in senescing leaves of Nicotiana glauca is caused by elevated concentrations of carbon dioxide in the intercellular spaces of leaf mesophyll tissue (ci). Senescing leaves selected for experiments were completely chlorotic and lacked positive rates of photosynthesis. When stomata in detached epidermis from senescing leaves were illuminated in CO2-free air, they opened to similar apertures as those in detached epidermis from nonsenescing leaves. To compare the effects of changes in ci on stomatal responses of the two leaf types, leaf ‘flags’ of either nonsenescing or senescing leaves were illuminated at a photosynthetic photon flux density of 500 μmol m−2 s−1 in a gas exchange cuvette. Leaf temperatures were maintained at 23.5 ± 0.5°C, and vapour pressure differences between leaves and the air were maintained between 0.70 and 0.75kPa. Ci was adjusted by changing external concentrations of carbon dioxide in air circulating through the cuvette. Conductances and photosynthetic rates of nonsenescing leaves changed in response to changes in ci, but neither the conductances nor the photosynthetic rates of senescing leaves were affected significantly by changes in q. We conclude that guard cells of senescing leaves of Nicotiana glauca do not lose the capacity to respond to changes in carbon dioxide concentration and that increases in ci resulting from declining rates of mesophyll photosynthesis are not the sole cause of maintenance of stomatal closure during leaf senescence. The data suggest that factors external to guard cells may prevent them from responding to changes in carbon dioxide concentrations in intact senescing leaves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1991.tb00967.x
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  • 16
    Electronic Resource
    Electronic Resource
    Control of weeds with UHF electromagnetic fields (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Weed research 15 (1975), S. 0 
    Details
    ISSN: 1365-3180
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Ultra-high frequency (UHF) etectromagnetic energy (2450±20 MHz) was applied for the pre-emergent and post-emergent control of weeds. Pre-emergent tests in the field indicated that energy levels above 70 J/cm2 were required for consistent control. There was no consistent selectivity between broad-leaved weeds and grasses when pre-emergent applications were made. Post-emergent tests indicated that broadleaved weeds were more susceptible than grasses to the UHF energy. Established plants were more susceptible than were seedings of the same species.Lutte contre les mauvaises herbes avec des champs magnétiques a ultra hautes fréquencesUne énergie électromagnétique à ultra haute fréquence (UHF) (2450±20 MhZ.) a été utilisée pour la lutte contre les mauvaises herbcs en pre et en post levee. Des essais au champ en prélevée out montré que des niveaux d'énergie supérieurs à 70 joules:cm2étaient nécessaires pour obtenir des résultats satisfaisants. II n'a pas été constaté de sélectivité entre plantes à feuilles larges et graminées vis-à-vis des traitements en prélevée, Les essais en posilevée onl montré que les mauvaises herbes à feuilles larges étaient plus sensibles que les graminées. à I'énergie UHF. Les plantes établies se sont révelées plus sensibles que les plantules des mêmes espéces.Unkrautbekämpfung mit elektromagnetischen UHF-FeldernElektromagnetische Energie im Bereich der Ultrahochfrequenzen (UHF; 2450±20 MHz) wurde zur Unkrautbekämpfung im Vor- und Nachauflaufverfahren eingeseizt. Feldversuche im Vorauflauf zeigten, dass für eine brauchbare Bekämpfung, Energien von über 70 joules/cm2 nötig waren. Die Anwendung im Vorauflauf war zwischen dikotylen Unkräutern und Gräsern nicht selektiv. Versuche im Nachauflaufverfahren zeigten, dass dikotyle Unkräuter gegenüber der UHF-Energie empfindlicher waren als die Gräser. Von der gleichen Species waren grössere Pflanzen jeweils empfindlicher als die Keimpflanzen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3180.1975.tb01088.x
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  • 17
    Electronic Resource
    Electronic Resource
    The dipping antiplane crack (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 106 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: We derive the elastostatic field arising from the introduction of a 2-D dipping antiplane crack at the surface of an elastic half-space having a pre-existing uniform field. The problem is equivalent to that of two identical, joined, antiplane cracks in an infinite, uniformly strained medium; each crack is inclined by the same amount from the axis of symmetry, giving rise to a bent crack. For cracks with the same depth of crack tip beneath the surface, the amount of elastic energy released increases with the angle from the vertical. However, the rate of energy release with increasing angle is less than the rate of increase of surface energy. Plane, vertical cracks are favoured energetically in infinite, homogeneous media, while bent cracks are favoured in heterogeneous media where a crack must deviate from straight line growth in order to bypass a high-strength barrier. We compare the trade-offs in total energy of bent cracks with barrier energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb06331.x
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  • 18
    Electronic Resource
    Electronic Resource
    Single-Link Cluster Analysis, Synthetic Earthquake Catalogues, and Aftershock Identification (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 104 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: This paper investigates several aspects of synthetic catalogue generation and aftershock identification schemes. First, we introduce a method for generating synthetic catalogues of earthquakes. This method produces a catalogue which has the geographic appearance of an actual catalogue when the hypocentres are plotted in map view, but allows us to vary the spatial and temporal relationships between pairs of close events. Second, we discuss six statistics to measure certain characteristics of synthetic and actual catalogues. These include four new statistics So, Bo, S1 and B1 which evaluate the distributions of link lengths between events in space and space-time as computed by single-link cluster analysis (SLC). Third, we develop a new scheme for identifying aftershocks in which a group of events forms an aftershock sequence if each event is within a space-time distance D of at least one other event in the group. We define the space-time separation of events by dst=√(d2+C2τ2), where d is the spatial separation of events, τ is the time separation, and C= 1km day-1. Our experience with several synthetic catalogues suggests that an appropriate trial value for D is 9.4 km1/2 (√S1) - 25.2 km. Here, S1, is the median link length using SLC with the metric dsT. Fourth, we generate synthetic catalogues resembling both teleseismic and local network catalogues to evaluate the validity and reliability of this aftershock identification scheme, as well as other schemes proposed by Gardner & Knopoff (1974), Shlien & Toksöz (1974), Knopoff, Kagan & Knopoff (1982), and Reasenberg (1985). Using a simple scoring method, we find that the SLC method compares favourably with other aftershock identification algorithms described in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb02512.x
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  • 19
    Electronic Resource
    Electronic Resource
    Nutrient Retention of Portioned Menu Items after Infrared and Convective Heat Processing (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Portion-controlled menu items were heat processed in infrared and convection ovens to compare the effects of the heating methods upon nutrient retention. Product yields for hamburger and potatoes were significantly greater (P 〈 0.05) after convective heating; for tomatoes, after infrared heating. Nutrients analyzed foi selected menu items included: thiamin, riboflavin, vitamin C, β-carotene, seven fatty acids, 18 amino acids, ammonia, phosphorus, iron and sodium. Several significant differences between the heat processed samples were revealed. The riboflavin and vitamin A contents in hamburger and tomatoes, respectively, were significantly greater after infrared heating. The total amino acid contents were significantly greater after infrared heating for the hamburger patties and cod fillets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb14919.x
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  • 20
    Electronic Resource
    Electronic Resource
    Nutrient Retention in Pork, Turkey Breast and Corned Beef Roasts after Infrared and Convective Heat Processing (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), 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: Roasts were heat processed by infrared and convection to compare the effects of these alternate heating methods upon nutrient retention. In addition to proximate analyses, nutrients analyzed included: thiamin, riboflavin, seven fatty acids, 18 amino acids, ammonia, sodium, phosphorus and iron. Convective heating of turkey breast and corned beef produced a higher product yield. Few significant differences between heat processed samples were revealed. After convection heating of corned beef, riboflavin was significantly higher (P 〈 0.05) than after infrared heating. Similarly, arachidonic acid (C20:4) was higher in turkey breasts. After infrared heating of pork, aspartic acid, threonine, serine were lower than after convective heating; ammonia was higher.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb14918.x
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