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  • 2005-2009
  • 2000-2004  (1)
  • 1970-1974  (1)
  • 1965-1969  (4)
  • Chemistry  (4)
  • Amphetamine  (1)
  • Soil and water retention  (1)
  • 1
    Digitale Medien
    Digitale Medien
    The interaction of amphetamine and body weight on a food-reinforced operant (1969)
    Springer
    Psychopharmacology 15 (1969), S. 64-72 
    Details
    ISSN: 1432-2072
    Schlagwort(e): Amphetamine ; Dextro Amphetamine ; Psychopharmacology ; Conditioning, Operant ; Pharmacodynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Bar pressing was maintained by food reinforcement of each fiftieth response (FR50 schedule). Rats were tested at 3 levels of food deprivation (60, 80 and 100% of ad libitum body weight) under three drug conditions (0, 0.2 and 0.4 mg of D-amphetamine per rat). Overall response rate was reduced by increasing doses of drug, but not significantly by deprivation, within the range studied. The components of response rate were analysed separately into the starting speed (latency of the first response of each ratio run of 50 responses) and running rate. Drug level affected running rate and first latency of the session, whereas body weight affected only first latency of the session. Only the first latency of the session showed an interaction of drug level and body weight. The lack of interaction raises the question, whether amphetamine is more properly administered as total dose per rat, rather than proportional to body weight.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00410802
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  • 2
    Digitale Medien
    Digitale Medien
    Assessing and Monitoring the Health of Western Rangeland Watersheds (2000)
    Springer
    Environmental monitoring and assessment 64 (2000), S. 153-166 
    Details
    ISSN: 1573-2959
    Schlagwort(e): Soil and water retention ; bare patch size ; percent bare soil ; grass ; shrub ; remote sensing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: Abstract The most important function of watersheds in the western U.S. is the capacity to retain soil and water, thereby providing stability in hydrologic head and minimizing stream sediment loads. Long-term soil and water retention varies directly with vegetation cover. Data on ground cover and plant species composition were collected from 129 sites in the Rio Grande drainage of south-central New Mexico. This area was previously assessed by classification of Advanced Very High Resolution Radiometry (AVHRR) imagery. The classification of irreversibly degraded sites failed to identify most of the severely degraded sites based on size of bare patches and 35% of the sites classified as degraded were healthy based on mean bare patch size and vegetation cover. Previous research showed that an index of unvegetated soil (bare patch size and percent of ground without vegetative cover) was the most robust indicator of the soil and water retention function. Although the regression of mean bare patch size on percent bare ground was significant (p 〈 0.001), percent bare ground accounted for only 11% of the variability in bare patch size. Therefore bare patch size cannot be estimated from data on percent bare ground derived from remote sensing. At sites with less than 25% grass cover, and on sites with more than 15% shrub cover, there were significant relationships between percent bare soil and mean bare patch size (p 〈 0.05). Several other indicators of ecosystem health were related to mean bare patch size: perennial plant species richness (r = 0.6, p 〈 0.0001), percent cover of increaser species (r = 0.5, p 〈 0.0001) and percent cover of forage useable by livestock (r = 0.62, p 〈 0.0001). There was no relationship between bare patch size and cover of species that are toxic to livestock. In order to assess the ability of western rangeland watersheds to retain soil and water using remote sensing, it will be necessary to detect and estimate sizes of bare patches ranging between at least 0.5 m in diameter to several meters in diameter.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006423708707
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  • 3
    Digitale Medien
    Digitale Medien
    Kathodische Korrosion von Blei im Erdboden (1969)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 20 (1969), S. 578-583 
    Details
    ISSN: 0947-5117
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Cathodic corrosion of lead in the soilCathodic corrosion of lead in the soil can be expected in exceptional cases only. The corrosion found on a particular lead cable could be simulated in the laboratory. It could be confirmed, that  -  probably by decomposition of primary lead hydride  -  metallic lead is deposited below layers of Ca and Mg compounds already at potentials below -1,7 V. A special switching method was developed to account for breakthrough polarisation.
    Notizen: Kathodische Korrosion von Blei im Boden ist grundsätzlich nur in Ausnahmefällen zu erwarten. Diese an einem Kabel gefundene Korrosion wurde im Laboratorium nachgebildet. Hierbei konnte bestätigt werden, daß unter Deckschichten aus Calcium- und Magnesiumverbindungen bei Potentialen schon unter -1,7 V metallisches, Blei abgeschieden wurde, wahrscheinlich durch Zersetzung von primär entstandenem Bleihydrid. Für derartige Untersuchungen wurde eine spezielle Schaltmethode entwickelt, bei welcher auch die Durchtrittspolarisation berücksichtigt wird.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/maco.19690200704
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  • 4
    Digitale Medien
    Digitale Medien
    Estimation of pressure drop for vertical pneumatic transport of solids (1967)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 608-611 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690130338
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  • 5
    Digitale Medien
    Digitale Medien
    Slip velocity of particulate solids in vertical tubes (1966)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 1070-1074 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: An equation using only easily determined physical properties of particles has been developed for calculating the slip velocity of nonspherical particulate solids falling in fluid media in the intermediate flow range where neither the Stokes nor Newton law applies. The variation in Reynolds numbers covered by this work ranged from 12 to 460. Slip velocities calculated from the equation differed from experimental data by an average deviation of only 3.7% when solids of a wide range of diameters (156 to 1,247 microns), densities (71 to 475 lb./cu. ft.), surface shape factors (0.40 to 0.97), and gases of a wide density range (0.01 to 0.31 lb./cu. ft.) were utilized. Thirty-eight different gas-solid systems were studied.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690120607
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  • 6
    Digitale Medien
    Digitale Medien
    Untersuchung von vinylpyridiniumverbindungen IV.III. I. MIELKE und H. RINGSDORF, Makromol. Chem. 142 (1970) 319. Polyreaktionen von 2-vinylpyridiniumsalzen (1971)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 149 (1971), S. 295-301 
    Details
    ISSN: 0025-116X
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/macp.1971.021490124
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