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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 29 (1975), S. 343-350 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Contamination of Dunaliella bioculata by 51Cr and 109Cd was observed experimentally to determine the possible uptake mechanisms of the metals by this alga. Despite slight contamination by 51Cr, it was not possible to demonstrate any active mode of absorption of the radionuclide. In the case of 109Cd, however, the various tests revealed that uptake did occur, the concentration factor being about 300 for a contact time of 15 days with this element.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 15 (1972), S. 74-80 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé 1. Des cultures de Dunaliella bioculata Butcher, 1959 ont été soumises à différentes doses d'irradiation γ (2, 4, 6, 8, 16, 32, 64, 128 milliers de rads). 2. Les doses égales ou supérieures à 10000 rads entraînent la destruction des cellules dans les 24 h qui suivent l'irradiation. Les doses inférieures provoquent l'arrêt ou le ralentissement des divisions cellulaires. 3. La teneur en chlorophylle a/l de suspension irradiée est toujours inférieure à celle des suspensions témoins non irradiées. 4. La quantité de chlorophylle a par cellule est par contre supérieure pour les algues irradiées et d'autant plus que la dose d'irradiation augmente (2000 à 800 rads). 5. L'augmentation du taux de chlorophylle a par cellule, étroitement liée à la dose de rayonnement, apparrît très clairement après les 24 h qui suivent l'irradiation.
    Notes: Abstract The influence of gamma radiation on the rate of cell division and the amount of chlorophyll a per cell was studied for Dunaliella bioculata Butcher, 1959 cultures. A decrease in the cell-division rate and an increase of chlorophyll a per cell were observed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Munksgaard International Publishers
    Journal of clinical periodontology 30 (2003), S. 0 
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective: To evaluate the effectiveness of a 0.5% chlorhexidine gel on the reduction of interdental gingival bleeding.Material and Methods: Forty-three mentally handicapped subjects, living in an institution (Casas André Luiz, Brazil), were enrolled in a double-blind randomised clinical trial. The subjects were randomly divided into two groups: test (chlorhexidine gel) and control (placebo gel). The gel was applied with trays, twice a day, over a period of 8 weeks. The interdental bleeding index (IBI) was recorded before and after the period in which the gel was used.Results: Statistical analysis showed that baseline IBI scores were similar (p=0.82) for test and control groups (55.6% and 54.5%, respectively). After 8 weeks, a statistically significant (p〈0.001) decrease in IBI means took place in the test group (33.2%). The control group presented a small increase (60.6%) in IBI scores. The difference between groups was significant at the end of the study (p〈0.001).Conclusion: The results indicated that the use of a 0.5% chlorhexidine gel was effective in reducing interdental gingival bleeding in special patients.
    Type of Medium: Electronic Resource
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