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  • 1
    Electronic Resource
    Electronic Resource
    Translocation of assimilates in Undaria and its cultivation in China (1997)
    Springer
    Hydrobiologia 352 (1997), S. 287-293 
    Details
    ISSN: 1573-5117
    Keywords: Undaria pinnatifida ; translocation ; photoassimilates ; growth ; cultivation ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Undaria cultivation on a commercial scale began in China only in the last decade. Today, Undaria pinnatifida is the main species under cultivation concentrated in two provinces, Liaoning and Shandong. The annual production in the early nineties was 8000-13 000 tons dry weight, which is two or three times the pre-1980 figures. The raft cultivation method maintaining the alga at the desired depths generally ensures the light saturated rate of photosynthesis on clear days, and enhances production. Under the cultivated condition, the calculated annual primary productivity of this alga is 160 gC m−2 y−1. Translocation of 14C-labelled photoassimilates in rapidly growing sporophyte of Undaria pinnatifida was studied in the open sea. Samples from different parts of the blade with counterparts exposed to tracer (NaH14CO3) showed that the translocation that occurred mainly from the tip of the blade to the growing region had obvious source-sink relationship. It took 20 minutes to translocate the labelled photoassimilates from the epidermis, via cortex, to the medulla of the midrib, where rates of translocation averaging 42–48 cm h−1 were observed in the open sea. Production experiments of tip-cutting of the blades showed an increased production of 9%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003004230593
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    Paper (German National Licenses)
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  • 2
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    Dynamic properties of micro-particles in ultrasonic transportation using phase-controllable standing waves (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-10-23
    Description: Ultrasonic manipulation has become an attractive method for surface-sensitive objects in micro-technology. Related phenomena, such as radiation force, multiple scattering, and acoustic streaming, have been widely studied. However, in current studies, the behavior of micro-particles in potential force fields is always analyzed in a quasi-static manner. We developed a dynamic model of a dilute micro-particle in the commonly used two-dimensional ultrasonic manipulation system to provide a systemic and quantitative analysis of the transient properties of particle movement. In this model, the acoustic streaming and hydrodynamic forces, omitted in previous work, were both considered. The trajectory of a spherical silica particle with different initial conditions was derived by numerically solving the established nonlinear differential integral equation system, which was then validated experimentally. The envelope of the experimental data on the x -axis showed good agreement with the theoretical calculation, and the greater influence on the y -axis of the deviation between the actual sound field and the ideal distribution employed in our dynamic model could account for the differences in displacement in that direction. Finally, the influence of particle size on its movement and the effect of acoustic streaming on calculating the hydrodynamic forces for an isolated particle with motion relative to the fluid were analyzed theoretically. It was found that the ultrasonic manipulation system will translate from an under-damped system to an over-damped system with a decrease in particle size and the micro-scale acoustic streaming velocity was negligible when calculating the hydrodynamic forces on the particle in the ultrasonic manipulation system.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 3
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    An approach to improving transporting velocity in the long-range ultrasonic transportation of micro-particles (2014)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2014-08-15
    Description: In existing ultrasonic transportation methods, the long-range transportation of micro-particles is always realized in step-by-step way. Due to the substantial decrease of the driving force in each step, the transportation is lower-speed and stair-stepping. To improve the transporting velocity, a non-stepping ultrasonic transportation approach is proposed. By quantitatively analyzing the acoustic potential well, an optimal region is defined as the position, where the largest driving force is provided under the condition that the driving force is simultaneously the major component of an acoustic radiation force. To keep the micro-particle trapped in the optimal region during the whole transportation process, an approach of optimizing the phase-shifting velocity and phase-shifting step is adopted. Due to the stable and large driving force, the displacement of the micro-particle is an approximately linear function of time, instead of a stair-stepping function of time as in the existing step-by-step methods. An experimental setup is also developed to validate this approach. Long-range ultrasonic transportations of zirconium beads with high transporting velocity were realized. The experimental results demonstrated that this approach is an effective way to improve transporting velocity in the long-range ultrasonic transportation of micro-particles.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 4
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    Thermoluminescence and Temperature-Dependent Afterglow Properties in BaSi2O2N2:Eu2+ (2013)
    Wiley
    Details
    Publication Date: 2013-06-29
    Description: BaSi 2 O 2 N 2 : Eu 2+ phosphor was successfully synthesized by using a simple solid-state reaction method. Its properties were systematically investigated utilizing XRD, photoluminescence, excited state decay curve, afterglow emission spectra, and thermoluminescence (TL) glow curve. With increasing temperature, its emission intensity decreases with the broadening full widths at half maximum. Particularly, its temperature-dependent afterglow emission spectra were investigated for the first time. Based on the information from TL glow curve, temperature-dependent afterglow decay curves, and afterglow emission spectra, a model was constructed to explain the mechanism of afterglow. This study provides a new perspective to use the temperature-dependent luminescence properties for studying the afterglow processes of long-lasting phosphorescence phosphors.
    Print ISSN: 0002-7820
    Electronic ISSN: 1551-2916
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Wiley
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  • 5
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    Specificity and binding affinity of an anti-crotoxin combinatorial antibody selected from a phage-displayed library (1995)
    Elsevier
    Details
    Publication Date: 1995-12-01
    Print ISSN: 0006-2952
    Electronic ISSN: 1873-2968
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Elsevier
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