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  • 1990-1994  (2)
  • Kidney  (1)
  • Solanum tuberosum L.  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Influence of antihypertensive therapy on renal function (1992)
    Springer
    Journal of molecular medicine 70 (1992), S. S120 
    Details
    ISSN: 1432-1440
    Keywords: Hypertension ; Kidney ; Antihypertensive drugs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antihypertensive therapy influences kidney function by different mechanisms depending on the mode of action of the drug used. The GFR is improved by calcium entry blockers and ACE inhibitors, unaffected by vasodilators, α-blockers and centrally acting sympatholytics and impaired by β-blockers. The same is true for renal blood flow and is due to changes of renal vascular resistance. Renal sodium excretion is impaired mostly by vasodilators, by α-blockers, sympatholytics and β-blockers; in contrast, calcium entry blockers and ACE inhibitors acutely induce natriuresis. The RAAS is stimulated by vasodilators, unaffected by α-blockers and sympatholytics and suppressed by β-blockers. Plasma catecholamines are stimulated by vasodilators and suppressed by centrally acting sympatholytics and unaffected by the others. Induction of acute renal functional impairment is reported for ACE inhibitors under conditions of compromised renal perfusion pressure such as in renal artery stenosis. These data from the literature reviewed are supported by our own experimental data on sodium balance under different drugs and micropuncture data in experimental renal artery stenosis. To achieve effective antihypertensive treatment with a low profile of side effects, careful monitoring of renal function seems to be mandatory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00207622
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Source: sink relationships in potato (Solanum tuberosum) as influenced by potassium chloride or potassium sulphate nutrition (1990)
    Springer
    Plant and soil 124 (1990), S. 287-290 
    Details
    ISSN: 1573-5036
    Keywords: cell sap ; chloride ; fertilizer ; potassium ; potato ; Solanum tuberosum L. ; solute potential ; source: sink ; sulphate ; tuber
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In pot experiments with Solanum tuberosum L. (cv Saturna) the application of KCl as compared to K2SO4 delayed tuber development. The solute composition of leaves of the KCl treated plants was significantly lower in K+ and NO3 -, but higher in Mg2+, Ca2+ and Cl-. Since the solute potential in the KCl treated plants was more negative and associated with a higher water content, a higher turgor pressure can be assumed. This could explain the enhanced shoot growth observed with KCl. Application of K2SO4, on the other hand, accelerated the development of tubers. This might result from a less competitive shoot sink in K2SO4 treated plants and a stimulated phloem loading and translocation of assimilates by higher concentrations of leaf-K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009274
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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