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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Carfax Publishing, part of the Taylor & Francis Group
    Addiction 96 (2001), S. 0 
    ISSN: 1360-0443
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Founded in 1969, SOCIDROGALCOHOL is a reference point for professionals interested in drug dependencies, both for Spaniards and for professionals belonging to Spanish-speaking areas. In its 32 years of existence SOCIDROGALCOHOL has spread to all the regions of Spain and most of the Latin-American countries. In the past 5 years SOCIDROGALCOHOL has undergone notable growth, increasing the number of members (from 460 to 816), as well as the number of scientific activities carried out. The National Conferences represent an annual meeting point for the members, where multiple scientific sessions take place, as well as the ordinary general assembly. They are usually held in the spring and last 3 days, with an attendance of around 400 professionals. Within the field of ongoing training, SOCIDROGALCOHOL also carries out other activities: the Autumn School, the Latin-American Virtual Congress of Drug Dependence, distance learning courses, etc. Special mention should be made to the official journal of the Society, Adicciones, founded in 1989. Adicciones is published quarterly in Spanish and its articles are subjected to peer review; 2000 copies of each issue are published. The abstracts can be accessed free on the website of the Society, www.SOCIDROGALCOHOL.org. In this paper the most relevant historical aspects of SOCIDROGALCOHOL will be summarized, along with its current activities and future perspectives.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Plant immune responses are usually accompanied by the production of extracellular superoxide at and surrounding infection sites. Extracellular reactive oxygen intermediates (ROIs) in plants were proposed to drive programmed cell death correlated with disease resistance (the hypersensitive ...
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cell expansion is a central process in plant morphogenesis, and the elongation of roots and root hairs is essential for uptake of minerals and water from the soil. Ca2+ influx from the extracellular store is required for (and sets the rates of) cell elongation in roots. ...
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  • 4
    ISSN: 1573-5028
    Keywords: Caffeic acid O-methyltransferase ; in situ hybridization ; lignification ; maize ; maize transformation ; tobacco transformation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pattern of expression directed by the promoter of the maize caffeic acid O-methyltransferase (COMT) gene was studied by histochemical and fluorometric β-glucuronidase (GUS) analysis in transgenic maize and tobacco plants. The COMT promoter directs GUS expression to the xylem and the other tissues undergoing lignification, and it responds to wounding and to elicitors. In transgenic maize plants, expression of GUS corresponds to the pattern of expression of the endogenous COMT gene as determined by northern analysis and in situ hybridization. The pattern in transgenic tobacco plants clearly shows that the maize promoter sequence is recognized by tobacco transcriptional factors, in spite of the anatomical differences and the evolutionary distance between these two species. The results suggest that the most significant promoter signals that induce the specific expression of the lignin COMT are conserved in different species.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-5028
    Keywords: in situ hybridization ; maize ; promoter analysis ; tobacco transformation ; tubulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the past few years many α- and β-tubulin genes of different organisms have been cloned and studied, and in most systems studied they constitute multigene families. In plants, most studies have been done in Arabidopsis thaliana and Zea mays. In this paper, the study of mRNA accumulation by in situ hybridization and the activity of three maize α-tubulin gene promoters (tua1, tua2 and tua3) in transgenic tobacco plants are described. In maize, the expression of these three tubulin isotypes differ in the root and shoot apex and is associated with different groups of cells throughout the distinct stages of cell differentiation. In transgenic tobacco plants the promoters of the genes, fused to the uidA reporter gene (GUS), direct expression to the same tissues observed by in situ hybridization experiments. The tua1 promoter is mainly active in cortex-producing meristematic cells and in pollen, whereas tua3 is active in cells which are differentiating to form vascular bundles in the root and shoot apices. The accumulation of tua2 mRNA is detected by RNA blot in a similar form as tua1, but at a very much low level. In situ hybridization indicates that the tua2 mRNA specifically accumulates in the maize root epidermis. No GUS staining was detected in transgenic tobacco plants with the tua2 promoter. The difference in expression of the specific genes may be linked to processes where microtubules have different functions, suggesting that in plants, as in animals, there are differences in the function of the tubulin isotypes.
    Type of Medium: Electronic Resource
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