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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of thin films of Y-Ba-Cu-O on oxidized silicon with a zirconia buffer layer (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 2068-2070 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of the high-temperature superconductor Y-Ba-Cu-O with zero-resistance transition temperatures up to 83 K have been recently reported by using a zirconia buffer layer on the primary materials of interest for electronics, Si and SiO2. In this letter, various characteristics of these films are discussed. Microstructural analysis using transmission electron microscopy shows the complex morphology of the unoriented polycrystalline films. Elemental depth profiling by x-ray photoelectron spectroscopy shows the effectiveness of the zirconia buffer layer in preventing interdiffusion; fluorine is found throughout the film at an abundance of 4 at. % The critical current density was measured as a function of temperature; its value is 5 kA cm−2 at 4.2 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99749
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  • 2
    Electronic Resource
    Electronic Resource
    Y-Ba-Cu-O superconducting thin films by simultaneous or sequential evaporation (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 584-586 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting thin films of Y-Ba-Cu-O near the 1:2:3 stoichiometry were produced by simultaneous (coevaporation) and sequential (multilayer) evaporation in the same evaporator. The best film obtained on yttria-stabilized zirconia (YSZ) had a superconducting onset temperature of 104 K, a midpoint Tc of 92 K, and zero resistance at T≤74 K. Stoichiometry was deduced by inductively coupled plasma emission spectroscopy, and elemental depth profiles were obtained by x-ray photoelectron spectroscopy. Film stoichiometry changes only near the film/substrate boundary for films on YSZ. Films on Si/SiO2 were not superconducting; depth profiling shows severe changes of film composition with depth. A major theme of this work is process reproducibility, which was found to be poor for coevaporation but improved considerably for sequential evaporation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99373
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  • 3
    Electronic Resource
    Electronic Resource
    Electrochemical oxide formation on titanium and titanium hydride (deuteride) thin-film surfaces (1986)
    s.l. : American Chemical Society
    Langmuir 2 (1986), S. 37-42 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00067a006
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  • 4
    Electronic Resource
    Electronic Resource
    Inhibition of browning, phenoxyacetic acids and phenolic metabolism in potato tuber discs: a model system to study chemicals that control common scab (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 33 (1984), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The browning of tuber discs was used as a model system to study the effect of substituted phenoxyacetic acids on tuber metabolism. Those substituted phenoxyacetic acids that reduce scab reduced browning but several compounds that do not affect scab also reduced browning. Evidence presented indicates that 3,5-dichlorophenoxyacetic acid preferentially inhibited phenolic metabolism rather than generally inhibiting the changes that occur after cutting (wounding). It is suggested that the decrease in potato common scab by foliar sprays of 3,5-D is due to a modified host metabolism which involves inhibition of phenolic biosynthesis but which has no effect on terpenoid biosynthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3059.1984.tb01327.x
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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
    Drug-induced disorders of the colon (1999)
    Springer
    Abdominal imaging 24 (1999), S. 23-28 
    Details
    ISSN: 1432-0509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900434
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  • 7
    Electronic Resource
    Electronic Resource
    Drug-induced disorders of the small bowel (1999)
    Springer
    Abdominal imaging 24 (1999), S. 17-22 
    Details
    ISSN: 1432-0509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900433
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  • 8
    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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  • 9
    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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  • 10
    Electronic Resource
    Electronic Resource
    The expression of class I patatin gene fusions in transgenic potato varies with both gene and cultivar (1991)
    Springer
    Plant molecular biology 16 (1991), S. 153-160 
    Details
    ISSN: 1573-5028
    Keywords: β-glucuronidase (GUS) (β-D-glucuronoside glucuronosohydrolase ; E.C.3.2.1.31) ; patatin ; potato cultivar promoter ; transgenic expression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Patatin is a family of glycoproteins that contributes about 40% of the total soluble protein in tubers of potato (Solanum tuberosum L.). The protein is encoded by a multigene family of 50–70 genes which have been divided into classes I and II on the basis of sequence homology. The promoters of two class I genes, PS20 and PS3/27, were transcriptionally fused to β-glucuronidase and transformed into the potato cultivars Désirée and Maris Bard. Examination of the expression levels in large populations of microtubers indicated that the PS20 promoter produced β-glucuronidase activities 5-fold lower in Désirée than Maris Bard whereas the PS3/27 promoter showed similar levels in both cultivars. Furthermore, the relative expression levels from the two promoters were reversed in the two cultivars. The β-glucuronidase enzyme activity was correlated with the mRNA level but not the copy number of the introduced gene. The implications for the use of patatin promoters in the genetic modification of tubers is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017925
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