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  • Life and Medical Sciences  (2)
  • Age (pea root)  (1)
  • Algae  (1)
  • 1
    ISSN: 1432-2048
    Keywords: Age (pea root) ; Lectin (pea root) ; Nitrate (nodulation) ; Nodule ; Pisum (root lectin) ; Root lectin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Root lectins are believed to participate in the recognition between Rhizobium and its leguminous host plant. Among other factors, testing this hypothesis is difficult because of the very low amounts in which root lectins are produced. A double-antibody-sandwich enzyme-linked immunoassay, was used to determine nanogram quantities of pea lectin in root slime and salt extracts of root cell-wall material when pea seedlings were 4 and 7 d old. In addition, a critical NO 3 - concentration (20 mM) which inhibited nodulation was found, and the lectin present in root slime and salt extracts of root cell walls of 4- and 7-d-old peas supplied with 20 mM NO 3 - was comparatively determined. With the enzyme-linked immunoassay, lectin quantities ranging between 20 and 100 nanograms could be determined. The assay is not affected by monomeric mannose and glucose (pealectin haptens). The slime of the 4-d-old roots contained more lectin than the slime of the 7-d-old roots. Salt-extractable, cell-wall-associated lectin accumulated in the older roots. Nitrate affected slime and cell-wall production, and the extractability of cell-wall material in both age groups. The presence of NO 3 - increased lectin in the slime, most notably in the younger roots; the relative amount of lectin in the slime was almost doubled. The cell-wall-associated, salt-extractable lectin decreased two- to threefold compared with the control group.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 203 (1990), S. 301-310 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The development of the morphologic features of neurons in the anterior dorsal ventricular ridge (ADVR) has been followed in Golgi preparations from the lizard Gallotia galloti between embryonic stage 32 and post-eclosion stages of specimens 3.6-4.5 cm in length. The differentiation sequence of multipolar and bitufted neurons was established. Dendritic growth cones are present after stage 34. Filiform dendritic processes are replaced later on by spines. Clusters of neurons first appear at stage 39 in the periventricular zone, the cells becoming Golgi-impregnated in pairs. After hatching, the number of impregnated cells per cluster increases.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 203 (1990), S. 293-300 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Using Golgi techniques we have studied neuronal cell types in the anterior dorsal ventricular ridge (ADVR) of the adult lizard Gallotia galloti. Multipolar, bitufted, and juxtaependymal neuronal forms were found. The multipolar and bitufted neurons are present in both the periventricular and central ADVR zones. Multipolar neurons can be subdivided into multipolar neurons with polygonal somata and four to six main dendritic trunks and multipolar neurons with pyramidal somata and three or more dendritic trunks. The former are the cells most frequently impregnated in the ADVR. In the population of bitufted neurons, we distinguish subtypes I, II, and III according to the number of dendritic trunks that emerge from the somata. Juxtaependymal neurons are restricted to a cell-poor zone, adjacent to ependymal cells. Their dendrites either are orientated parallel to the ventricular surface or extend into the periventricular zone. The dendrites of ADVR neurons have pedunculated spines with knob-like tips. However, such spines do not appear on the somata or on the primary dendritic trunks. The number of spines is scarce or moderate. The periventricular neuronal clusters contain two to five cells. The morphology of these neurons is mainly multipolar, but we also found some bitufted neurons.
    Additional Material: 4 Ill.
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  • 4
    Publication Date: 2021-05-19
    Description: Marine organisms represent a new source for the discovery of anti-inflammatory agents (Grace et al., 1994), mainly obtained starting from sponges, coelenterates and algae. A representative compound from algae, due to its great number of properties, is the epitaondiol that inhibits the phospholipase A2 and the formation and/or release of prostaglandins and leukotrienes. Taking into account these antecedents, we decided to evaluate extracts from four Rhodophyte algae species of the genera Laurencia, Acantophora and Gracilaria in the models of mouse ear oedema induced by croton oil, writhing induced by acetic acid in mouse, and the assay of the tiobarbituric acid (TBA). The objective was to detect antiinflammatory, analgesic and antioxidant properties of the extracts. The extract from the algae of the genus Acantophora inhibits the mouse ear oedema induced by croton oil in 58%, and the extracts from the genera Laurencia and Gracilaria inhibit the writhing induced by acetic acid with values higher than 50%. None of the studied extracts had any effect in the assay of the TBA. Therefore, it can be concluded that the studied algae extracts seem to have antiinflammatory and analgesic properties, probably inhibiting the formation and/or release of prostaglandins.
    Description: Published
    Description: anti-inflammatory, analgesic,
    Keywords: Algae ; Antioxidants ; Algae ; Antioxidants
    Repository Name: AquaDocs
    Type: Journal Contribution
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