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  • Articles  (23)
  • Articles: DFG German National Licenses  (23)
  • Blackwell Publishing Ltd  (23)
  • American Geophysical Union
  • Arctic Institute of North America
  • Oxford University Press
  • 1990-1994  (12)
  • 1985-1989
  • 1980-1984
  • 1975-1979  (11)
  • 1950-1954
  • 1935-1939
  • 1994  (12)
  • 1979  (4)
  • 1978  (4)
  • 1975  (3)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (15)
  • Geosciences  (8)
  • Process Engineering, Biotechnology, Nutrition Technology  (8)
  • Mathematics
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  • Articles  (23)
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  • 1990-1994  (12)
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  • 1975-1979  (11)
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  • 1
    Electronic Resource
    Electronic Resource
    Filtration Experiments of Henry Darcy (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 32 (1994), 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.1745-6584.1994.tb00926.x
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  • 2
    Electronic Resource
    Electronic Resource
    MECHANISMS OF WATER LOSS OF BOVINE SEMITENDINOSUS MUSCLE DRY COOKED FROM THE FROZEN STATE (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 43 (1978), 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 mechanisms of water loss and their relation to muscle shortening were investigated by dry cooking in a controlled environment oven. Air was pumped vertically upward in the oven at a rate of 13.7 m3/hr. Cylindrical muscle samples were cooked at 121°C, 149°C and 177°C. The axes of these samples were in vertical, 45° and horizontal directions with respect to the oven. The muscle fibers were parallel to the axes of these samples. It is observed that total weight loss is almost independent of sample orientation, implying that the draining of fluid by gravity (a mechanism which is believed to be closely related to sample orientation) is not an important mechanism of mass transfer. The main mechanism is possibly fiber shrinkage which squeezes fluid out during cooking. Linear relationships between remaining water content and sample length were observed both before and after protein denaturation. The slopes of these two linear relations are different, suggesting that the way fluid is squeezed out is different before and after protein denaturation. Also, these slopes are almost independent of oven temperature in the 121-177°C range, suggesting that the remaining moisture content depends primarily on the shortening during cooking of a sample and only weakly on the oven temperature and initial condition (i.e., frozen or frozen-thawed) of the sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1978.tb15266.x
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  • 3
    Electronic Resource
    Electronic Resource
    Ground Water Monitoring Statistics Update: Part II: Nonparametric Prediction Limits (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water monitoring & remediation 14 (1994), S. 0 
    Details
    ISSN: 1745-6592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Nonparametric prediction limits can be useful statistical tools for ground water monitoring at facilities regulated under RCRA Subtitle C. Subtitle D. and similar regulations. New, exact tables arc presented for both “1 of m” plans (m chances to gel one observation inbounds at each of r monitoring wells to avoid a statistically significant increase) and “California” plans (first or all of the next m-1 observations inbounds at each well). The tables provide per-constituent significance levels (false positive rates) as a function of the background sample size n. m. r, the prediction limit (the largest or the next to largest, background observation), and the confirmatory resampling plan selected.When used in a monitoring program, future observations from several wells are compared with a prediction limit obtained from a common background sample. The table significance levels therefore depend critically on having IID (independent and identically distributed) observations. In particular, the false positive rate computations are not valid, and the procedures should not be used, with constituents whose measurements exhibit inherent spatial or systematic temporal variability.Recent U.S. EPA guidance explicitly encourages controlling facility-wide false positive rates over both constituents and wells. Nonparametric prediction limits, particularly with California resampling plans, will have greater difficulty in meeting the new. lower per-constituent false positive rate goals than previous ones, especially if many constituents are involved. Nonetheless, nonparametric prediction limits remain superior to other commonly used procedures for dealing with data with high proportions of nondctects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6592.1994.tb00494.x
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  • 4
    Electronic Resource
    Electronic Resource
    Growth Response of Penaeus setiferus to Four Commercial Feeds Under Controlled Laboratory Conditions (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 25 (1994), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Shrimp farmers have access to and have evaluated a diverse number of shrimp species; however, due to culture and market considerations three penaeid species (Penaeus monodon, P. orientalis and P. vunnamei) account for 80% of the world production (Weidner and Rosenbeny 1992). Although culture techniques for these species have been extensively studied and are relatively well established, they are not native to U.S. coastal waters and hence possess problems associated with the use of exotic species. Three native species P. aztecus. brown shrimp; P. duorarum, pink shrimp; and P. setiferus, white shrimp, support commercial fisheries along the Gulf states (Gulf of Mexico Fishery Management Council 1981). The commercial culture of these species would avoid the inherent problems associated with the culture of exotic species and allow shrimp farmers in the Caribbean basin to more effectively expand operations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1994.tb00825.x
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  • 5
    Electronic Resource
    Electronic Resource
    EDUCATION OF FUTURE GROUND-WATER PROFESSIONALS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 32 (1994), 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.1745-6584.1994.tb00910.x
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  • 6
    Electronic Resource
    Electronic Resource
    Natural Biological Attenuation of Benzene in Ground Water Beneath a Manufacturing Facility (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 32 (1994), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Subsurface unsaturated soils and ground water directly beneath a manufacturing site have been shown to contain benzene. The vadose zone appears to be the current source for benzene to the aquifer. Although the ground water contains several mg/1 of contamination in the area immediately beneath the source, benzene was not detected in monitoring wells approximately 400 feet downgradient. Based upon the length of time benzene has been present in the ground water, as well as the permeability of the aquifer, physical processes alone such as adsorption and advection/dispersion are unlikely to account for the observed attenuation. Results from this investigation indicated the attenuation was primarily due to the natural biological processes occurring within the aquifer.Evidence for the natural bioremediation of benzene from the ground water included: (1) analysis of ground-water chemistry, (2) laboratory studies demonstrating benzene biodegradation in aquifer samples, and (3) computer simulations examining contaminant transport. Laboratory studies indicated that under conditions similar to those encountered in the ground water, benzene was degraded to carbon dioxide by the naturally occurring microorganisms. The aerobic degradation of benzene in aquifer samples was quite rapid, with the time for 50% disappearance of the parent compound ranging from 4 to 14 days. In situ analyses of the ground water indicated significant levels of dissolved oxygen throughout the aquifer. Thus, the availability of oxygen should not limit the aerobic biodegradation of benzene. However, benzene was also shown to degrade under anaerobic conditions in microcosms prepared with aquifer material. Computer model simulations were also conducted to examine the processes influencing the transport of benzene in the aquifer. Results from the model simulations indicated biodegradation was the dominant process influencing attenuation of the contaminant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1994.tb00636.x
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  • 7
    Electronic Resource
    Electronic Resource
    Attenuation and Biodegradation of Chlorophenols in Ground Water at a Former Wood Treating Facility (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 32 (1994), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: This communication describes novel methods to measure site-specific sorption data, and to determine if biodegradation of pentachlorophenol (PCP) in complex technical-grade formulations occurs at industrial facilities. Ground-water slurry samples containing between 0.012 and 230 mg/l PCP were collected from a former wood treating site, the liquid and solid fractions separated, and both fractions analyzed for PCP using selective ion monitoring to determine sorption coefficients (Kd(PCP)). Although field sorption coefficients could not be represented by simple Freundlich and Langmuir isotherms, an empirical hyperbolic function (Kd(PCP)) = 0.054 + 0.086/Caq) fit the isotherm (r 〉 0.99), demonstrating that for PCP 〉 10 mg/l, no measurable retardation occurred in the aquifer. Biodegradation of PCP in ground water was apparent when PCP concentrations were 〈 20 mg/1, while at higher concentrations, PCP in the technical-grade formulation appeared to break down less readily. The results imply that, at the plume periphery, PCP in the subsurface will be attenuated and degrade, while at higher concentrations (i.e., at the source), PCP is mobile, and more recalcitrant to degradation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1994.tb00639.x
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  • 8
    Electronic Resource
    Electronic Resource
    A Portable Air-Minipermeameter for Rapid In Situ Field Measurements (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 32 (1994), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Measurements of air-permeability in outcrops provide a means of obtaining numerous spatially distributed measurements for statistical analysis and subsequent parameterization of ground-water flow and transport modeling. The air-minipermeameters previously used for such studies generally consist of a compressed air source, rotameters, and diaphragm gauges. We present a lightweight syringe-based air-minipermeameter (LSAMP) design that is significantly more portable than previous instruments. The prototype model is contained in a 12.7 × 15.2 × 23 centimeter (5 × 6 × 9 inch) electrical box and weighs approximately 2 kilograms. The prototype LSAMP has a sampling range of 0.5 to 200 darcys. Individual measurements in this range require less than one minute. Permeability measured with the LSAMP closely correspond to permeability measured with a traditional minipermeameter and those measured on cores. Measurement error caused by soil moisture is less than 5 percent for volumetric water contents less than 5 percent. An analysis of variance on 38 triplicate measurements indicates that the variability associated with measurement error is much less than the range of measured values. Repeated permeability measurements under field conditions on two standard cores indicate that while the measurement error is greater under field conditions, the prototype device field performance is consistent with laboratory calibration results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1994.tb00640.x
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  • 9
    Electronic Resource
    Electronic Resource
    FLOATATION OF FRESH WATER ON SEA WATER, A HISTORICAL NOTE (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Ground water 16 (1978), S. 0 
    Details
    ISSN: 1745-6584
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Abstract. W. Badon Ghyben and A. Herzberg are commonly credited with the first scientific description of fresh ground water floating on deeper saline water along coastal areas of the world. As C. W. Carlston has pointed out, J. DuCommun should receive the credit for the first quantitative statement of the “Ghyben-Herzberg principle,” DuCommun's work having antedated publications by both Badon Ghyben and Herzberg by more than 60 years. Moreover, two well-known scholars, Pliny the Elder and Charles Darwin also wrote on the topic long before Badon Ghyben and Herzberg.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-6584.1978.tb03260.x
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  • 10
    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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