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  • hypertension  (38)
  • crystal structure
  • evolution
  • porous silicon
  • Springer  (62)
  • 2000-2004
  • 1985-1989  (62)
  • 1985  (62)
Collection
Keywords
Publisher
Years
  • 2000-2004
  • 1985-1989  (62)
Year
  • 1
    Electronic Resource
    Electronic Resource
    On the physical crosslinking of amine-extended polyurethane urea elastomers: A crystallographic analysis of bis-urea from diphenyl methane-4-isocyanate and 1,4-butane diamine (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 335-341 
    Details
    ISSN: 1435-1536
    Keywords: Polyurethane elastomers ; hard segment ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The substance under investigation is taken as a model for hard segments consisting of MDI 1) and 1,4-butane diamine. It crystallizes in the triclinic space group P¯1 witha=4.6297;b=5.8259;c=25.286 Å;α=90.721;β=91.580;γ=102.90 degrees andZ=1. Bond distances and angles are given, together with some data on the conformation. The most significant finding is that neighbouring molecules in one and the same plane are linked to one another by means of bifurcated hydrogen bonds. A comparison with the corresponding data for an analogous bis-urethane provides a plausible explanation of the main differences between diamine and glycol extension in polyurethane elastomers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412250
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  • 2
    Electronic Resource
    Electronic Resource
    Creativity in biology and in the human mind (Manifestation of Concepts) (1985)
    Springer
    Acta biotheoretica 34 (1985), S. 3-51 
    Details
    ISSN: 1572-8358
    Keywords: anthropic principle ; creativity ; evolution ; insight ; manifestation ; mental creativity ; organismal creativity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00418105
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  • 3
    Electronic Resource
    Electronic Resource
    Systematics and evolution of holarctic Pierinae (Lepidoptera). An enzyme electrophoretic approach (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 24-29 
    Details
    ISSN: 1420-9071
    Keywords: Pieridae ; Lepidoptera ; systematics ; evolution ; enzyme electrophoresis ; genetic differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Enzyme electrophoretic data show a remarkably high degree of genetic similarity within the European group ofnapi s.l. whereas genetic differences exist at several loci between the European and the North American taxa ofnapi s.l. It is concluded that the European taxa did not differentiate to the species level and form a phylogenetically young group. The North American taxa included in this study are specifically distinct from Europeannapi and separated much earlier. Within these North American taxamarginalis, oleracea andvirginiensis did undergo speciation. The data show a splitting of the genusPieris into three species groups, each genetically differentiated to the same level. The splitting ofPieris into two genera, as suggested by earlier investigators, is not supported here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02005856
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  • 4
    Electronic Resource
    Electronic Resource
    The evolution of sex and the role of sex in evolution (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1231-1235 
    Details
    ISSN: 1420-9071
    Keywords: Sex ; recombination ; evolution ; parasites ; the Tangled Bank ; the Red Queen ; sex-allocation ; sexual selection ; sex determination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952065
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  • 5
    Electronic Resource
    Electronic Resource
    Two theories of sex and variation (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1235-1245 
    Details
    ISSN: 1420-9071
    Keywords: Sex ; evolution ; the Tangled Bank ; the Red Queen ; recombination experiments ; genotype × environment interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952066
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  • 6
    Electronic Resource
    Electronic Resource
    Structural characteristics of the mammalian spleen indicating storage and release of red blood cells. Aspects of evolutionary and environmental demands (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 159-163 
    Details
    ISSN: 1420-9071
    Keywords: Spleen ; red pulp ; storage ; release ; morphology ; evolution ; structural characteristics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02002608
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  • 7
    Electronic Resource
    Electronic Resource
    On the evolution of the spleen (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 145-152 
    Details
    ISSN: 1420-9071
    Keywords: Spleen ; evolution ; phylogeny ; ontogeny ; non-mammalian spleen ; mammalian spleen ; comparative macromorphology ; comparative micromorphology ; intralienal vessels ; extralienal vessels ; differentiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02002606
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  • 8
    Electronic Resource
    Electronic Resource
    Sex determining mechanisms: An evolutionary perspective (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1285-1296 
    Details
    ISSN: 1420-9071
    Keywords: Sex ; sex determination ; sex ratio ; evolution ; animals ; genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Theories on the evolution of sex determining mechanisms are reviewed for male and female heterogamety, environmental sex determination, and briefly, haplo-diploidy and hermaphroditism. Because of their discrete and well-defined nature, sex determining mechanisms lend themselves to three types of evolutionary questions:what variety occurs and might be expected but does not occur,how do changes occur from one mechanism to another, andwhy do certain changes occur? All three approaches were illustrated for these different sex determining mechanisms. A generality emerging from these studies is that, at the level of selection on the sex ratio, there are no intrinsic problems in evolving from one sex determining mechanism to another: straightforward transitions between different mechanisms exist under various conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952071
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  • 9
    Electronic Resource
    Electronic Resource
    Phosphoglycerate mutase isozymes in the lower vertebrates (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1471-1472 
    Details
    ISSN: 1420-9071
    Keywords: Phosphoglycerate mutase isozymes ; evolution ; gene duplication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The phosphoglycerate mutase isozyme patterns from cyclostomata, cartilaginous and bony fish were analyzed. The observed patterns indicate that a duplication of a single ancestral gene coding for phosphoglycerate mutase took place during the evolution of the gnathostome vertebrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950042
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  • 10
    Electronic Resource
    Electronic Resource
    Stimulation of aldosterone secretion by metoclopramide is not affected by chronic converting enzyme inhibition (1985)
    Springer
    European journal of clinical pharmacology 29 (1985), S. 207-210 
    Details
    ISSN: 1432-1041
    Keywords: metoclopramide ; enalapril ; aldosterone secretion ; dopamine receptors ; hypertension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary To assess if dopaminergic control of aldosterone secretion is mediated by the renin-angiotensin system, the effect of chronic angiotensin converting enzyme inhibition by enalapril on the aldosterone response to metoclopramide has been studied in 10 patients with mild to moderate essential hypertension. Enalapril reduced supine blood pressure and increased the heart rate significantly. Plasma renin activity and urinary sodium excretion rose significantly. PRA was not changed by metoclopramide, neither during placebo nor during enalapril treatment. Metoclopramide induced a two-fold increase in plasma aldosterone, the peak response being reached within 15 min. Enalapril treatment did not alter the aldosterone response to metoclopramide. Dopaminergic control of aldosterone secretion appears to be independent of the renin-angiotensin system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00547423
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