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  • 1
    Electronic Resource
    Electronic Resource
    Effective mass density of fluid suspensions (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 1091-1097 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The influence of particles suspended in a fluid on the effective mass density of the suspension is studied. It is shown how at high concentration the low-density, single-particle behavior is modified by retarded hydrodynamic interactions. To simplify the calculation we make a point particle approximation and take account only of two-body hydrodynamic interactions. It is found that the effective mass density depends on frequency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.857399
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  • 2
    Electronic Resource
    Electronic Resource
    FLUID MECHANICAL ASPECTS OF THE GAS-LIFT TECHNIQUE (2006)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 38 (2006), S. 225-249 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The gas-lift technique comprises the injection of gas bubbles in vertical oil wells to increase production. It is based on a reduction of the tubing gravitational pressure gradient. Several fluid-flow phenomena influencing such vertical gas-liquid flows are discussed. These effects include the radial distribution of void fraction and of gas and liquid velocity, flow regime changes, and system stability problems. Associated consequences for gas-lift performance and related optimization approaches are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fluid.38.061505.093942
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  • 3
    Electronic Resource
    Electronic Resource
    Relative stabilities of zeolitic aluminosilicates (1988)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 92 (1988), S. 4462-4465 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100326a043
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  • 4
    Electronic Resource
    Electronic Resource
    TL-DNA from Agrobacterium rhizogenes plasmid pRi1855 reduces the osmotic pressure in transformed plants grown in vitro (1986)
    Springer
    Planta 168 (1986), S. 106-112 
    Details
    ISSN: 1432-2048
    Keywords: Agrobacterium ; Brassica (transformed plants) ; Genetic manipulation ; Osmotic pressure ; Potassium ; Solanum (transformed plants)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Growth, water content, osmotic pressure and solute content were examined for normal potato (Solanum tuberosum L. cv. Desiree) and a derivative (line D9X8a), which was genetically transformed with TL-DNA from Agrobacterium rhizogenes. Plants were grown (i) in vitro, (ii) in a growth chamber and (iii) in the field. In vitro, the transformed potato plants produced more biomass than the untransformed plants, partly because they had a higher water content. Potassium concentration and osmotic pressure were lower in cell sap extracted from the transformed potato shoots. In some cases the difference was as much as 50%. These differences were less clear, absent or reversed in plants from a growth chamber or from the field. In the field, however, transformed potato senesced early. It is suggested that a cellular basis for these observations may be changes induced by Ri TL-DNA expression products in plant membrane properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00407016
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  • 5
    Electronic Resource
    Electronic Resource
    Genetic transformation in two potato cultivars with T-DNA from disarmed Agrobacterium (1987)
    Springer
    Theoretical and applied genetics 73 (1987), S. 744-750 
    Details
    ISSN: 1432-2242
    Keywords: Genetic manipulation ; Neomycin phosphotransferase ; Mixed infection ; Somaclonal variation ; Solanum tuberosum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Derivatives of potato (Solanum tuberosum cv.'s ‘Maris Bard’ and ‘Desiree’) transformed with disarmed T-DNA from genetically engineered Agrobacterium tumefaciens strains were isolated. The transformed plants were recovered from shoot-forming tumours induced by infection of wounds with mixedcultures of shoot-inducing A. tumefaciens strains T37 and either Agrobacterium strain LBA1834(pRAL1834), (Hille et al. 1983) or LBA4404(pBIN6; pRAL4404), (Bevan 1984). Two small-scale feasibility experiments gave at least four ‘Maris Bard’ plants transformed with pRAL1834 T-DNA and two ‘Desiree’ plants with pBIN6 T-DNA. The transformed ‘Maris Bard’ plants were morphologically abnormal and highly aneuploid. This was probably an unfortunate side-effect of a tissue culture-step introduced to promote the efficiency of shoot regeneration. The transformed ‘Desiree’ plants, in contrast, were isolated without promoting additional shoot-growth. They were morphologically normal, contained 47 and the euploid 48 chromosomes per cell respectively and had improved growth on media containing kanamycin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260785
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic manipulation in cultivars of oilseed rape (Brassica napus) using Agrobacterium (1985)
    Springer
    Theoretical and applied genetics 71 (1985), S. 325-329 
    Details
    ISSN: 1432-2242
    Keywords: A. tumefaciens ; A. rhizogenes ; Brassica napus ; Plant development
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The response of oilseed rape cultivars to infection with Agrobacterium tumefaciens and A. rhizogenes and the possibility of regenerating genetically transformed oilseed rape plants were examined. The frequency at which Agrobacterium induced galls or hairy-roots on in vitro cultured plants ranged from 10% to 70%, depending on the cultivar. From galls induced by the tumorigenic strain T37, known to be strongly shoot inducing on tobacco, roots developed frequently. Occasionally, shoots formed and some of these produced tumour cell specific nopaline. Attempts to grow the transformed shoots into plants have so far been unsuccessful. Whole plants transformed with Ri-T-DNA, however, were regenerated. These had crinkled leaves and abundant, frequently branching roots that showed reduced geotropism, similar to previously isolated Ri T-DNA transformed tobacco and potato plants. The transformed oilseed rape plants flowered, but failed to form seeds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252075
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  • 7
    Electronic Resource
    Electronic Resource
    Changes in translatable poly(A) RNA from differentiated potato tissues transformed with shoot-inducing Ti TL-DNA of Agrobacterium tumefaciens (1986)
    Springer
    Plant molecular biology 6 (1986), S. 213-220 
    Details
    ISSN: 1573-5028
    Keywords: Crown gall ; cytokinins ; in vitro translation ; poly(A) RNA ; potato ; T-DNa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Two dimensional gel electrophoresis was used to examine differences in steady state total poly(A) RNA from untransformed potato (Solanum tuberosum cv. Maris Bard) and potato transformed with shoot-inducing TL-DNA from A. tumefaciens. RNA was compared from phenotypically very distinct in vitro cultured shoots, more similar grafted plants and tubers. In each case between 200–400 translation products were identified representing the more abundant poly(A) mRNA's. In general, poly(A) RNA from the transformed tissues gave more high molecular weight products. This increase was most evident in poly(A) RNA from shoot cultures. Depending on the tissue examined, 1–5% of the translation products with a molecular weight 〈43 KD were observed to increase or decrease in abundance. The influence of T-DNA on cellular gene expression in the different transformed potato tissues is discussed in relation to previously determined changes in T-DNA gene expression (particularly of the T-DNA cytokinin gene) and the corresponding changes in endogenous hormone concentrations. It is concluded that some of the specific changes in low molecular weight products are either directly caused by the increased cytokinin levels or are indirectly involved in maintaining the transformed phenotype. re]19850530 rv]19851206 ac]19851210
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015227
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  • 8
    Electronic Resource
    Electronic Resource
    Book reviews (1988)
    Springer
    Space science reviews 47 (1988), S. 203-209 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223241
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  • 9
    Electronic Resource
    Electronic Resource
    Genetic modification of potato development using Ri T-DNA (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 440-446 
    Details
    ISSN: 1432-2242
    Keywords: Agrobacterium rhizogenes ; Potato ; Somaclonal variation ; Genetic manipulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Forty-two potato plants were regenerated from a hairy-root line obtained after infection of a shoot of Solanum tuberosum cv ‘Desiree’ with Agrobacterium rhizogenes strain LBA 9402 (pRil855). Transformed plants were uniform and had a distinct phenotype and development compared with untransformed controls. Their growth was vigorous, especially early in their development, their roots were abundant and showed reduced geotropism, their leaves were slightly crinkled and glossy and they produced longer tubers with more frequent, prominent eyes. Cytological examination showed that ten of the forty-two transformed plants had either 47 or 49 chromosomes instead of the normal 48. In two of these aneuploids structural changes were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273752
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  • 10
    Electronic Resource
    Electronic Resource
    Particle collision theories applied to agglomeration in suspension (1985)
    Springer
    Flow, turbulence and combustion 42 (1985), S. 265-276 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An experimental and theoretical investigation has been made of an agglomeration technique for small solid particles suspended in a liquid. In this technique the particles are agglomerated under the action of a binding liquid, which is added to the turbulently flowing suspension and wets the particles. Special attention was paid to the first part of the wetting period of the technique. Using existing particle collision theories it was found, that the collision efficiency for solid particles and binding liquid droplets during the first part of the wetting period is extremely low; only one out of every thousand to ten thousand collisions results in an adhesion of a particle to a droplet. The influence of the energy dissipation rate and of the viscosity of the suspension liquid on the collision process as predicted by one of the theories is in reasonably good agreement with the experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00539344
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