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  • 11
    Electronic Resource
    Electronic Resource
    Radio frequency photoinjector using LaB6 cathode and a nitrogen drive laser (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 411-413 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the successful operation of an inexpensive, simple, and reliable 2.856 GHz radio frequency photoinjector using a rugged LaB6 cathode and a nitrogen drive laser operating at a wavelength of 337 nm. The cathode was operated at a vacuum of (approximate)10−8 Torr, and produced excellent beam quality. The device produces a 1 ns long pulse containing 0.1 nC of charge. The photoelectrons have been accelerated to 270 MeV in traveling-wave linear accelerator. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.121851
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Zeta potential measurements of cell wall preparations from Regnellidium diphyllum and Nymphoides peltata (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 13 (1990), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract. Cell wall particles were prepared from the semi-aquatic plants Regnellidium diphyllum and Nymphoides peltata with minimum disruption to the integrity of the cell wall. The behaviour of freshly-prepared and frozen-thawed particles in a D.C. electric field was monitored with a microscope attached to video recording apparatus. From the respective particles mobility in a well-defined electric field. it was possible to determine their electrostatic potential and consequently estimate the corresponding surface charge density. Experiments were performed in media of different pH and cation concentration (ie, K+ Ca2+). A significant electronegative potential was found in cell wall preparations of both plants. Freezing and thawing further reduced the electrostatic potential for both plant species in all the media utilized for electrophoresis. A reduction of pH or an increase of the cation concentration was found to neutralize the electrostatic potential in a sigmoidal fashion. Ca2+ was more than 10 times more effective than K+ at neutralizing the apparent electrostatic potential of the cell wall preparations. Regnellidium was found to have a lower electrostatic potential than Nymphoides, although both responded in a similar manner to the various treatments. The possible relevance of the cell wall electrostatic potential, pH and [Ca2+] and particularly their inter-relationship is discussed for the two species of plants in terms of their differing growth responses to the ionic environment of the plant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1990.tb01321.x
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  • 13
    Electronic Resource
    Electronic Resource
    Bear rfq-beam experiment aboard a rocket
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 40-41 (1989), S. 949-953 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(89)90514-4
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    Paper (German National Licenses)
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  • 14
    Electronic Resource
    Electronic Resource
    The Electrostatic Nature of the Cell Surface of Candida albicans: A Role in Adhesion
    Amsterdam : Elsevier
    Experimental Mycology 18 (1994), S. 111-120 
    Details
    ISSN: 0147-5975
    Keywords: Adhesion ; Candida albicans ; cell surface ; cell wall ; electrostatic forces
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/emyc.1994.1013
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  • 15
    Electronic Resource
    Electronic Resource
    Introduction (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 631-632 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941022
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  • 16
    Electronic Resource
    Electronic Resource
    Studies on the mineral nutrition of tea (1975)
    Springer
    Plant and soil 43 (1975), S. 259-278 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate fertilizer incorporated in the soil placed around tea plants when planted in the field produced a large improvement in the rate of growth of the plants, thus indicating that tea in acid soils had a demand for phosphate. Yield responses to phosphate fertilizer applied to mature tea were uncommon and the pattern of these confused. This work showed that mature tea will absorb phosphate and give positive yield responses when there is an undisturbed mulch layer on the soil surface. Within this layer phosphate is maintained in a more available form and many highly active roots are formed. These conditions are destroyed by manual weeding; the mulch forms naturally from tea leaves and prunings where no-cultivation herbicidal weed control is practised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928491
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    Paper (German National Licenses)
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  • 17
    Electronic Resource
    Electronic Resource
    Studies on the mineral nutrition of tea (1975)
    Springer
    Plant and soil 43 (1975), S. 259-278 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate fertilizer incorporated in the soil placed around tea plants when planted in the field produced a large improvement in the rate of growth of the plants, thus indicating that tea in acid soils had a demand for phosphate. Yield responses to phosphate fertilizer applied to mature tea were uncommon and the pattern of these confused. This work showed that mature tea will absorb phosphate and give positive yield responses when there is an undisturbed mulch layer on the soil surface. Within this layer phosphate is maintained in a more available form and many highly active roots are formed. These conditions are destroyed by manual weeding; the mulch forms naturally from tea leaves and prunings where no-cultivation herbicidal weed control is practised.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01928491
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    Paper (German National Licenses)
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