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  • 1995-1999  (3)
  • Migration  (2)
  • Tracer test  (2)
  • Mouse urine  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Effective porosity and specific yield of a sedimentary rock determined by a field tracing test using tritium as a tracer (1996)
    Springer
    Environmental geology 27 (1996), S. 170-177 
    Details
    ISSN: 1432-0495
    Keywords: Effective porosity ; Specific yield ; Migration ; Tracer test ; Porosity ; Tritium ; Finite element method ; Longitudinal dispersivity ; Sedimentary rock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Effective porosity value was analyzed from the tritium concentration of sampled groundwater using a three-dimensional groundwater-flow and advection-dispersion code based on the finite element method. The effective porosity value was about 10%. Porosity values measured from core samples were 7–15%. The groundwater flow velocity estimated from the tritium concentrations was about 1 × 10−5 cm s−1. Therefore, during the low groundwater flow velocity condition, effective porosity and porosity values were the same. At the same test site, a 0.48% effective porosity value, determined by another tracer test injecting Br− solution into the aquifer during groundwater level change, was smaller than the porosity value when the flow velocity was 1.8×10−2 cm s−1. Thus the effective porosity value is concluded to be due to groundwater flow velocity. The specific yield value was calculated to be 0.6% by the total volume of tunnel seepage water and the total volume of the rock unsaturated during tunnel construction. However, as pore water continued to be drained after the groundwater level change was completed, the specific yield value became larger than 0.6%. Thus specific yield value is concluded to be due to drainage time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00770429
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Effective porosity and specific yield of a sedimentary rock determined by a field tracing test using tritium as a tracer (1996)
    Springer
    Environmental geology 27 (1996), S. 170-177 
    Details
    ISSN: 1432-0495
    Keywords: Key words Effective porosity ; Specific yield ; Migration ; Tracer test ; Porosity ; Tritium ; Finite element method ; Longitudinal dispersivity ; Sedimentary rock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Effective porosity value was analyzed from the tritium concentration of sampled groundwater using a three-dimensional groundwater-flow and advection-dispersion code based on the finite element method. The effective porosity value was about 10%. Porosity values measured from core samples were 7–15%. The groundwater flow velocity estimated from the tritium concentrations was about 1 × 10–5 cm s–1. Therefore, during the low groundwater flow velocity condition, effective porosity and porosity values were the same. At the same test site, a 0.48% effective porosity value, determined by another tracer test injecting Br– solution into the aquifer during groundwater level change, was smaller than the porosity value when the flow velocity was 1.8 × 10–2 cm s–1. Thus the effective porosity value is concluded to be due to groundwater flow velocity. The specific yield value was calculated to be 0.6% by the total volume of tunnel seepage water and the total volume of the rock unsaturated during tunnel construction. However, as pore water continued to be drained after the groundwater level change was completed, the specific yield value became larger than 0.6%. Thus specific yield value is concluded to be due to drainage time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002540050048
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Nullification of a positive correlation between urinary contents of α1-microglobulin and ulinastatin with intracerebroventricularly administered 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and 1-methyl-4-phenylpyridinium (MPP+) in mice (1998)
    Springer
    Psychopharmacology 136 (1998), S. 374-378 
    Details
    ISSN: 1432-2072
    Keywords: Key words MPTP ; MPP+ ; α1-Microglobulin ; Ulinastatin ; Mouse urine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Striatal dopamine contents in C57BL/6J mice were reduced at 24 h after intracerebroventricular (ICV) administration of 1-methyl-4-phenyl-1,2, 3,6-tetrahydropyridine (MPTP) or 1-methyl-4-phenylpyridinium (MPP+) in a dose-dependent manner. A dose of 1.8 μg MPP+ significantly (P 〈 0.05) suppressed the dopamine contents, whereas a similar dose of MPTP did not. A definite positive correlation between urinary contents of α1-microglobulin (α1M) and ulinastatin (UT) existed in normal mice. However, this correlation was nullified by ICV administration of 18 and 36 μg MPTP or 1.8 and 18 μg MPP+. With 1.8 μg MPTP, a positive correlation between urinary contents of α1M and UT was displayed. The urine volume, creatinine content, glomerular filtration rate, α1M and UT contents, and α1M/UT ratio of urine collected for 24 h post-ICV administration of MPTP or MPP+, were not statistically different from those of control mice. Our findings suggest that the central effects of MPP+, a neurotoxic metabolite of MPTP, nullify the positive correlation between urinary contents of α1M and UT without affecting renal functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002130050580
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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