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  • 1
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    UMBERTO CERRONI, "La Libertà dei Moderni" (Book Review) (1969)
    Camden, N. J. : Periodicals Archive Online (PAO)
    Social Research. 36:3 (1969:Autumn) 481 
    Details
    ISSN: 0037-783X
    Topics: Sociology
    Notes: BOOK REVIEW SECTION
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3313-1969-036-03-000008
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  • 2
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    Elite Theory and Ideology (1970)
    Camden, N. J. : Periodicals Archive Online (PAO)
    Social Research. 37:2 (1970:Summer) 275 
    Details
    ISSN: 0037-783X
    Topics: Sociology
    Notes: "FOCUS: SECULARIZATION AND COUNTER-SECULARIZATION IN CONTEMPORARY SOCIETY"
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3313-1970-037-02-000007
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular technologies for biodiversity evaluation: Opportunities and challenges (1997)
    [s.l.] : Nature Publishing Company
    Nature biotechnology 15 (1997), S. 625-628 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] Better information on the degree and distribution of genetic variation is essential for developing more efficient ways of evaluating and conserving biodiversity. At present, an array of molecular techniques is available to detect diversity at the DNA level1, but the application of these ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0797-625
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  • 4
    Electronic Resource
    Electronic Resource
    Biotechnology, Biodiversity, and Conservation (1995)
    [s.l.] : Nature Publishing Company
    Nature biotechnology 13 (1995), S. 522-522 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] “Biodiversity”is an issue high on the political agenda that molecular biology could help to address. Decisions concerning the environment and industrial exploitation are being made in the name of “biodiversity,” but in the absence of efficient methods of evaluation and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0595-522
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  • 5
    Electronic Resource
    Electronic Resource
    Isolation, culture, and regeneration of plants from potato protoplasts (1989)
    Springer
    Plant cell reports 8 (1989), S. 307-311 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A technique is described for the routine isolation of protoplasts from storage parenchyma cells of potato tubers grown in vitro. The protoplasts typically contained many starch grains. On culture, most of the starch grains were metabolised during the first 7 days, after which the cells began to divide. Following further culture, protoplast-derived colonies and calli were obtained, from which shoots and intact plants were regenerated. Cytological study of regenerated plants showed that the majority were octaploid or aneuploid at the octaploid level. This aspect is compared with plants regenerated from mesophyll protoplasts of potato. The use of tuber protoplasts for studies on tissue-specific transient gene expression of chimeric gene constructs, following their introduction into the protoplasts by electroporation, is discussed, together with the uses of tuber protoplasts in fundamental physiological and biochemical studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00274137
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  • 6
    Electronic Resource
    Electronic Resource
    Analysis of rye B-chromosome structure using fluorescencein situ hybridization (FISH) (1995)
    Springer
    Chromosome research 3 (1995), S. 466-472 
    Details
    ISSN: 1573-6849
    Keywords: B chromosome ; DNA sequence composition ; fluorescencein situ hybridization ; repetitive sequence ; Secale cereale ; translocations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Fluorescencein situ hybridization (FISH) has been used to analyse the structure of the rye B chromosome. Genomicin situ hybridization (GISH) demonstrates the high level of overall similarity between A and B chromosomes of rye, as well as the presence of a number of specific sequences. The B-specific repeat families D1100 and E3900 have been analysed in terms of their physical location and possible contiguity. Rye Bs contain members of the rye-specific dispersed repetitive family R173, as well as centromeric regions similar to those of the As. The B chromosomes analysed in our study lack detectable rDNA sequences. Anomalous results have been obtained with a number of subtelomeric repetitive probes from rye. Bs usually lack these sequences, but evidence is presented that in some cases A–B translocation events may relocate such sequences from the As to the Bs. These data are discussed in the context of current models for the origin of the B chromosome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713960
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  • 7
    Electronic Resource
    Electronic Resource
    Karyotypic changes in potato plants regenerated from protoplasts (1985)
    Springer
    Plant cell, tissue and organ culture 4 (1985), S. 171-182 
    Details
    ISSN: 1573-5044
    Keywords: potato ; protoplasts ; regeneration ; aneuploidy ; karyotypic changes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Over two hundred plants were regenerated from shoot-culture derived proto-plasts of potato (Solanum tuberosum L. cv. Majestic). Some had grossly aberrant phenotypes but the majority were similar to, or indistinguishable from normal control Majestic. Cytological examination showed that on average, 57% of the regenerants had the normal chromosome number (2n=4x=48). The remainder were aneuploids and fell into two classes in approximately equal numbers. The first class was limited at about the euploid level (ie, 2n=44−49). The second class contained plants with higher chromosome numbers ranging from 2n=73 to the octaploid level (2n=8x=96). The overall results represent an improvement over our earlier studies on chromosome variation in protoplast-derived potato plants. In addition, three cases of structural chromosome variation were observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042275
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  • 8
    Electronic Resource
    Electronic Resource
    Somaclonal variation as a tool for crop improvement (1955)
    Springer
    Euphytica 85 (1955), S. 295-302 
    Details
    ISSN: 1573-5060
    Keywords: tissue culture ; somaclonal variation ; plant breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Somaclonal variation is a tool that can be used by plant breeders. The review examines where this tool can be applied most effectively and the factors that limit or improve its chances of success. The main factors that influence the variation generated from tissue culture are (1) the degree of departure from organised growth, (2) the genotype, (3) growth regulators and (4) tissue source. Despite an increasing understanding of how these factors work it is still not possible to predict the outcome of a somaclonal breeding programme. New varieties have been produced by somaclonal variation, but in a large number of cases improved variants have not been selected because (1) the variation was all negative, (2) positive changes were also altered in negative ways, (3) the changes were not novel, or (4) the changes were not stable after selfing or crossing. Somaclonal variation is cheaper than other methods of genetic manipulation. At the present time, it is also more universally applicable and does not require ‘containment’ procedures. It has been most successful in crops with limited genetic systems and/or narrow genetic bases, where it can provide a rapid source of variability for crop improvement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023959
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  • 9
    Electronic Resource
    Electronic Resource
    Chromosome doubling in monohaploid and dihaploid potatoes by regeneration from cultured leaf explants (1984)
    Springer
    Plant cell, tissue and organ culture 3 (1984), S. 363-373 
    Details
    ISSN: 1573-5044
    Keywords: Potato chromosome doubling ; leaf callus ; regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plants were regenerated from cultured excised leaf segments of monohaploid (2n=x=12) and diphaloid (2n=2x=24) potato (Solanum tuberosum L.) and a sample has been studied cytologically. In the case of monohaploids, a single leaf regeneration cycle resulted in almost total recovery of doubled monohaploid plants (2n=2x=24), whilst 50% of the plants regenerated from doubled monohaploid leaves had doubled again to the doubled double monohaploid (or homozygous tetraploid, 2n=4x=48) level. Regeneration from dihaploid leaf pieces also gave a good proportion (60%) of doubled genotypes. Very few mixoploids and very few aneuploids were found. These results, together with the general applicability of the method to a large number of potato cultivars, suggest that it can be used as a simple and reliable method of obtaining homozygous tetraploid potatoes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043089
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