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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of Langmuir-Blodgett Multilayers Using a QuartzCrystal Microbalance: Estimation of Molecular Area and Ionization (1994)
    s.l. : American Chemical Society
    Langmuir 10 (1994), S. 1524-1527 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00017a033
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  • 2
    Electronic Resource
    Electronic Resource
    Transport Phenomena. (1961)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 83 (1961), S. 1521-1521 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01467a065
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  • 3
    Electronic Resource
    Electronic Resource
    Diffusion in Gels and Polymeric Solutions (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 907-907 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Metzner's article appeared just after a study had been completed in this laboratory in which the diffusion coefficients of carbon dioxide and sulphur dioxide in aqueous solutions of carboxymethylcellulose (CMC) had been measured2,3. Unlike Metzner, we found no anomalous diffusion rates in the CMC ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/214907a0
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  • 4
    Electronic Resource
    Electronic Resource
    Cleistogamy in Grasses (1983)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 14 (1983), S. 411-441 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.14.110183.002211
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  • 5
    Electronic Resource
    Electronic Resource
    Pentaerythritol Production Yields (1955)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 47 (1955), S. 1710-1713 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50549a016
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  • 6
    Electronic Resource
    Electronic Resource
    Amphicarpum purshii and the “pessimistic strategy” in amphicarpic annuals with subterranean fruit (1982)
    Springer
    Oecologia 52 (1982), S. 327-332 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Amphicarpum purshii Kunth is an annual amphicarpic grass of recently disturbed sandy areas in the Coastal Plain of eastern North America, producing small aerial and larger subterranean seeds. At study sites on the eastern edge of the Pine Barrens of New Jersey, the temporal aspects of reproductive allocation were investigated through biweekly whole-plant field harvests of 25 plants each throughout the 1980 growing season, and the survivorship of plants arising from aerial and subterranean seeds was monitored in a total of 10 high and 10 low density quadrats at two sites differeing in soil moisture. Plants arising from subterranean propagules began to allocate early (July 16) considerable energy to subterranean reproduction (ca 40% of whole-plant dry weight by the last half of August); allocation to aerial culms and flowers did not begin until mid-August and never exceeded 3% on a population basis. Plants arising from aerial propagules (“aerial plants”) produced only subterranean flowers, and these flowers first appeared 2 wk later than they did on “subterranean plants.” Survivorship was greater for the subterranean seedlings at both the dry and wet sites and at low and high densities, and aerial plants showed significantly less total growth and seed production than subterranean plants. The “pessimistic strategy” (early allocation of energy to large subterranean propagules) in the annual Amphicarpum has its selective basis in the relative vigor, survival, and timing and amount of reproduction of the two types of seedlings, and appears comparable to the allocation strategies of at least eight other amphicarpic annuals in at least five other families of plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00367955
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  • 7
    Electronic Resource
    Electronic Resource
    The shift in aerial/subterranean fruit ratio in Amphicarpum purshii: causes and significance (1983)
    Springer
    Oecologia 57 (1983), S. 374-379 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Amphicarpum purshii Kunth, an annual grass, produces both small aerial and larger subterranean seeds, and previous research has indicated that the ratio of the number of viable aerial seeds to the number of viable subterranean seeds decreases with secondary succession and/or the lack of frequent disturbance. The objective of this research was to determine if increasing density and/or greater seed depth could produce this shift in reproductive allocation. Plants arising from aerial and subterranean seeds were grown in pure and mixed cultures at varying densities in a greenhouse to note the effects of intraspecific competition on biomass allocation. In addition, subterranean seeds were sown at varying depths to note the effects of seed depth. Results showed that the growth of plants from aerial seeds was severely depressed in mixtures of plants from the two types of seeds. Increasing density in both pure and mixed cultures led to drastic decreases in allocation to aerial seeds, but the percentage allocation to subterranean seeds was not significantly reduced. Greater seed depth led to decreased emergence rates and increased percentage allocation to subterrancean seeds. It is suggested that as secondary succession progresses, A. purshii and other plants increase in abundance, and the increasing density and the deeper burial of subterrranean seeds result in plants producing mostly subterranean seeds which accumulate in the soil seed bank. These strongly indurate propagules remain viable following the disappearance of Amphicarpum plants in secondary succession and can give rise to “instant populations” upon subsequent vegetation removal and/or soil disturbance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377183
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  • 8
    Electronic Resource
    Electronic Resource
    The role of seed depth, litter, and fire in the seedling establishment of amphicarpic peanutgrass (Amphicarpum purshii) (1987)
    Springer
    Oecologia 73 (1987), S. 459-464 
    Details
    ISSN: 1432-1939
    Keywords: Amphicarpum ; Fire ; Litter ; Seedling establishment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Amphicarpum purshii is an annual grass which mostly grows in disturbed areas of the New Jersey Pine Barrens, USA. It is amphicarpic, producing spikelets (and seeds) both above and below the soil surface. Previous research has shown that subterranean seed production ensures reproduction in the event of a major disturbance such as fire and results in rapid post-burn colonization of these sandy habitats. The effects of fire, litter, and seed depth were further examined by planting subterranean seeds at four depths in 16 litter-covered flats buried at ground level and comparing plants arising from burned flats with those in undisturbed litter-covered flats. At 0 and 1 cm depth, rates of seedling emergence were lowest in burned flats. Surface-sown seeds produced seedlings more likely to desiccate. Sowing depth had a greater influence on most measured characters than burning treatments. The mean depth of subterranean seed placement by Amphicarpum is 3.5 cm and this coincides with the seed depth from which plants showed the greatest height growth, shoot biomass, and reproductive output. In a second experiment, subterranean seeds on the bare soil surface in clay pots were more likely to lose viability and less likely to germinate than seeds protected by litter or burial in soil. In addition to providing protection from fire, placement of seeds below ground in the sandy habitat of peanutgrass provides conditions more suitable for seed survival and subsequent seedling establishment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385265
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  • 9
    Electronic Resource
    Electronic Resource
    Grenzflächenwiderstand: Diffusion in einem laminaren Flüssig/flüssig-Strahl (1962)
    Springer
    Colloid & polymer science 184 (1962), S. 67-67 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01840174
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  • 10
    Electronic Resource
    Electronic Resource
    Diffusion through the liquid-liquid interface (1964)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 10 (1964), S. 155-159 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690100206
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