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  • Springer  (55)
  • American Association of Petroleum Geologists
  • 1995-1999  (28)
  • 1980-1984  (28)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    A chemically-defined medium supporting growth and providing cells converting compactin to pravastatin (1999)
    Springer
    Journal of industrial microbiology and biotechnology 22 (1999), S. 78-79 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: Actinomadura; pravastatin; compactin; nutrition; vitamins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Actinomadura sp strain 2966, which converts compactin to pravastatin, requires vitamins to support its growth. Addition of folic acid, thiamine and cyanocobalamine allowed growth in chemically-defined medium. Cells grown in a chemically-defined medium were as capable of converting compactin to pravastatin as cells grown in a complex medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900602
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  • 2
    Electronic Resource
    Electronic Resource
    A field study of the chemical degradation of paraquat dichloride following simulated spillage on soil (1981)
    Springer
    Bulletin of environmental contamination and toxicology 26 (1981), S. 16-21 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01622047
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  • 3
    Electronic Resource
    Electronic Resource
    Potential exposure to dislodgable residues after application of two formulations of methyl parathion to apple trees (1981)
    Springer
    Bulletin of environmental contamination and toxicology 27 (1981), S. 95-100 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01610993
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  • 4
    Electronic Resource
    Electronic Resource
    Gastric availability of a liquid concentrate formulation of paraquat dichloride following simulated spillage on soil (1980)
    Springer
    Bulletin of environmental contamination and toxicology 24 (1980), S. 555-561 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01608155
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison of coronal holes observed in soft X-ray and He i 10 830 Å spectroheliograms (1983)
    Springer
    Solar physics 87 (1983), S. 47-56 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare coronal holes observed in solar soft X-ray images obtained with rocket-borne telescopes during 1974 to 1981 with holes observed on nearly simultaneous 10830 Å maps. Hole boundaries are frequently poorly defined, and after 1974 the brightness contrast between the large scale structure and holes appears substantially diminished in both X-rays and 10830 Å. We find good agreement between soft X-rays and 10830 Å for large area holes but poor agreement for mid and low latitude small area holes, which are generally of low contrast. These results appear inconsistent with the popular view that the quiet corona is sharply separated into open magnetic field regions consisting of coronal holes and closed field regions consisting of the large scale structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151159
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  • 6
    Electronic Resource
    Electronic Resource
    The spatial distribution of 6 centimeter gyroresonance emission from a flaring X-ray loop (1984)
    Springer
    Solar physics 92 (1984), S. 271-281 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare simultaneous high resolution soft X-ray and 6 cm images of the decay phase of an M3 X-ray flare in Hale Region 16413. The photographic X-ray images were obtained on an AS & E sounding rocket flown 7 November, 1979, and the 6 cm observations were made with the VLA. The X-ray images were converted to arrays of line-of-sight emission integrals and average temperature throughout the region. The X-ray flare structure consisted of a large loop system of length ∼ 1.3 arc min and average temperature ∼8 × 106 K. The peak 6 cm emission appeared to come from a region below the X-ray loop. The predicted 6 cm flux due to thermal bremsstrahlung calculated on the basis of the X-ray parameters along the loop was about an order of magnitude less than observed. We model the loop geometry to examine the expected gyroresonance absorption along the loop. We find that thermal gyroresonance emission requiring rather large azimuthal or radial field components, or nonthermal gyrosynchrotron emission involving continual acceleration of electrons can explain the observations. However, we cannot choose between these possibilities because of our poor knowledge of the loop magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157251
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  • 7
    Electronic Resource
    Electronic Resource
    X-Ray and microwave observations of active regions (1983)
    Springer
    Solar physics 85 (1983), S. 267-283 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare coordinated, high spatial resolution (2–3 arc sec) observations at 6 cm and in soft X-rays with photospheric magnetograms and optical filtergrams of two active regions. The correspondence of the brightest centimetric components in these regions with coronal loops, sunspots and pores, chromospheric structures and the photospheric magnetic field was determined. Our principal results are: The association between the microwave components and coronal X-ray and photospheric magnetic field structures is complex; in general X-ray emission was not associated with the microwave components. A majority of the components were not associated with sunspots, although the brightest (T b ≥ 4 × 106 K) components overlay regions of strong photospheric field or high field gradients. Several of the components coincided with the apparent bases of shorter coronal loops and 4 with the tops of X-ray loops. The X-ray and magnetic field observations are used to constrain possible centimetric emission mechanisms. Thermal bremsstrahlung can not be a significant contributor to this bright microwave emission. Thermal gyro-resonance absorption is consistent with some of the observations, but untenable for those components which are bright in microwaves, lack X-ray emission, and overlie regions of weak magnetic field. As an explanation for the brightest (T b ≥ 4 × 106 K) components, the g-r theory requires coronal loops with significant currents but very low densities. Alternatively, a nonthermal mechanism implies that the emission arises from the transition region and suggests that discrete regions of continuous particle acceleration may be common in active regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148654
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  • 8
    Electronic Resource
    Electronic Resource
    Methyl parathion persistence in soil following simulated spillage (1981)
    Springer
    Archives of environmental contamination and toxicology 10 (1981), S. 451-458 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Simulated spillage of emulsifiable concentrate (E.C.) and microencapsulated formulations of methyl parathion on soil were studied. Persistence of residues from both formulations spilled as concentrates and as simulated drum rinses were followed for up to 45 months. Spillage of encapsulated formulation resulted in the formulation of a solid cake-like deposit on the soil surface, which could be a particularly attractive hazard to small children. At 45 months, soil residues had decreased by 64% for emulsifiable concentrate spills, and 68% for the soil beneath the microencapsulated cake. Residue in the cake itself only decreased by 31%. Soil residue levels from simulated drum rinses were essentially innocuous by 45 months for the emulsifiable concentrate and by one year for the microencapsulated material. The leaching of methyl parathion from the microencapsulated cake into soil and the relationship between available residue and wet weather were also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01055441
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  • 9
    Electronic Resource
    Electronic Resource
    Evaluation of various clothing materials for protection and worker acceptability during application of pesticides (1982)
    Springer
    Archives of environmental contamination and toxicology 11 (1982), S. 391-398 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Seven different garment materials were examined for resistance to penetration by eight commonly used sprays and one concentrated pesticide formulation. The lightweight materials were four types of spunbonded olefin and a water repellent cellulostic and were compared to heavy cotton drill and rubberized cotton. The latter two materials are used for making coveralls and raingear commonly employed as applicator's protective clothing. Penetration tests were designed to mimic repeated exposure to drifting spray and exposure to concentrated pesticide formulation splashed on a worker during preparation of spray. Lightweight materials were penetrated by more pesticide than would penetrate rubberized rainwear. All of the materials tested would provide significant protection for applicators who chose to wear only short-sleeved shirts and cotton trousers during hot weather rather than endure the discomfort of rubberized cotton garments. Only polyethylene-coated spunbonded olefin and rubberized cotton provided adequate protection against concentrated pesticide formulations. In direct sunlight, the interior surface temperatures of black or dark green, rubberized raingear averaged ∼70°C (158°F) and reached as high as 83°C (181°F). Under similar conditions the interior surface of white, lightweight jackets averaged ∼40°C (104°F). Cellulostic material tore too easily for use in orchard spraying. Some garments leaked around the seams, but this may be corrected by use of other seam designs. Spraymen indicated they would wear lightweight garments during hot weather.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056064
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  • 10
    Electronic Resource
    Electronic Resource
    Geology and evolution of lakes in north-central Florida (1999)
    Springer
    Environmental geology 38 (1999), S. 301-321 
    Details
    ISSN: 1432-0495
    Keywords: Key words Sinkhole ; Karst ; Lake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Fluid exchange between surficial waters and groundwater in karst environments, and the processes that control exchange, are of critical concern to water management districts and planners. High-resolution seismic data were collected from 30 lakes of north-central Florida. In each case study, lake structure and geomorphology were controlled by solution and/or mechanical processes. Processes that control lake development are twofold: (1) karstification or dissolution of the underlying limestone, and (2) the collapse, subsidence, or slumping of overburden to form sinkholes. Initial lake formation is directly related to the karst topography of the underlying host limestone. Case studies have shown that lakes can be divided by geomorphic types into progressive developmental phases: (1) active subsidence or collapse phase (young); (2) transitional phase (middle age); (3) baselevel phase (mature); and (4) polje (drowned prairie) – broad flat-bottom that have one or all phases of sinkhole. Using these criteria, Florida lakes can be classified by size, fill, subsurface features, and geomorphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050428
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