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  • 1
    Electronic Resource
    Electronic Resource
    Food uptake and fine structure of Cryothecomonas longipes sp. nov., a marine nanoflagellate incertae sedis feeding phagotrophically on large diatoms (2000)
    Springer
    Helgoland marine research 54 (2000), S. 18-32 
    Details
    ISSN: 1438-3888
    Keywords: Key words Cryothecomonas longipes ; Marine diatoms ; Nanoflagellate ; Parasitoid ; Phagocytosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Cryothecomonas longipes Schnepf and Kühn sp. nov. is a colourless biflagellate organism, 9–14 µm long and 7–9 µm wide when not filled with food vacuoles. It was detected in the North Sea, feeding with pseudopodia on diatoms. It penetrates the host shell, while the main body of the flagellate remains outside the frustule. Cells are covered with a multilayered theca. The pseudopodium protrudes through a preformed slit in the theca. Each flagellum also emerges through a pit in which the theca forms a funnel of complex structure that girdles each flagellum. The anterior flagellum is 9–15 µm long and oriented forward; the ventral flagellum, posteriorly directed, is 20–24 µm long and bears fine hairs. The flagellar roots consist of microtubules that emerge at satellites around the basal bodies and run along the flagellar pits. In addition, the ventral flagellum is accompanied by a band of six microtubules. It is proximally attached to a small fibrillar band, which interconnects the basal bodies. Cryothecomonas longipes has two or three types of extrusomes which pierce the theca when discharged. Their mode of discharge is discussed. Microbody-like vesicles containing small tubules are closely associated with older digestion vacuoles. Cryothecomonas longipes is compared with other species of the genus and a diagnosis is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101520050032
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  • 2
    Electronic Resource
    Electronic Resource
    A theory of the adaptive growth of biological materials (2000)
    Springer
    Archive of applied mechanics 70 (2000), S. 183-192 
    Details
    ISSN: 1432-0681
    Keywords: Key words Mixture theory ; adaptive growth ; tree ; bone remodeling ; biomechanics ; stimulus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary In this paper, a new theory of the adaptive growth of biological materials is presented. The theory is derived from the basic laws of continuum mechanics. The material is described as a classical mixture of solid material and fluid. It will be shown that several well-known models of the adaptive growth are embedded in this more general theory. In addition, it is clarified on which material assumptions these models are based. Finally, a solution procedure for the new theory is developed, and several examples are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004199900056
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  • 3
    Electronic Resource
    Electronic Resource
    Room temperature stable single-photon source (2002)
    Springer
    The European physical journal 18 (2002), S. 191-196 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 42.50.Dv Nonclassical field states; squeezed, antibunched, and sub-Poissonian states; operational definitions of the phase of the field; phase measurements – 03.67.-a Quantum information – 78.67.-n Optical properties of nanoscale materials and structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We report on the realization of a stable solid state room temperature source for single photons. It is based on the fluorescence of a single nitrogen-vacancy (NV) color center in a diamond nanocrystal. Antibunching has been observed in the fluorescence light under both continuous and pulsed excitation. Our source delivers 2×104 s-1 single-photon pulses at an excitation repetition rate of 10 MHz. The number of two-photon pulses is reduced by a factor of five compared to strongly attenuated coherent sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjd/e20020023
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    Paper (German National Licenses)
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