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  • 1
    Electronic Resource
    Electronic Resource
    Gracilaria conferta and its epiphytes: (2) Interrelationship between the red seaweed and Ulva cf. lactuca (1993)
    Springer
    Hydrobiologia 260-261 (1993), S. 391-396 
    Details
    ISSN: 1573-5117
    Keywords: Gracilaria ; Ulva ; epiphytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ulva cf. lactuca has been a disturbing competitor of experimental Gracilaria conferta outdoor cultures in Israel. The effect of environmental conditions on the competitive ability of Ulva versus Gracilaria, and the main limiting factors for which these seaweeds compete, were studied here. Single and biculture experiments of both seaweeds showed that Ulva outgrew and damaged Gracilaria under all irradiance and temperature combinations. The higher competitive ability of Ulva cf. lactuca in bicultures was not a result of responses to shading or nitrogen shortage, but rather to a shortage of available inorganic carbon, an increase in pH and apparent excretions of Ulva which inhibited the growth of Gracilaria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00049046
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  • 2
    Electronic Resource
    Electronic Resource
    Health related quality of life among persons with HIV after the use of protease inhibitors (2000)
    Springer
    Quality of life research 9 (2000), S. 941-949 
    Details
    ISSN: 1573-2649
    Keywords: Antiretroviral therapy ; Canada ; HIV/AIDS ; Protease inhibitors ; Quality of life
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: This study was conducted to determine the effect of the use of HIV protease inhibitors on the quality of life among persons infected with HIV. Methods: Subjects were participants in the British Columbia Centre for Excellence in HIV/AIDS Drug Treatment Program who had completed two annual participant surveys, one prior to initiating therapy with a protease inhibitor and one after. Quality of life was measured using the Medical Outcomes Study Short Form Health Survey (MOS-SF). Statistical analyses were conducted using parametric and multivariate methods. Results: Our analysis was based on 179 HIV-positive individuals. Compared to quality of life at baseline, we found no statistically significant changes in the health perception, pain, physical, role and social functioning MOS-SF subscale scores at follow-up. The measure of mental health was the only component to decline significantly over time. Sub-analyses found significant increases in the measures of health perception (p = 0.004), physical (p = 0.037), role (p 〈 0.001) and social functioning (p = 0.053) for individuals with a low baseline quality of life. For those with a higher quality of life before starting a protease inhibitor containing regimen we observed a significant decline in the subscales of mental health (p = 0.001), physical (p = 0.007), role (p = 0.021) and social functioning (p = 0.003) over the study period. Conclusions: Our findings indicate that despite strict dosage requirements and adverse side effects associated with protease inhibitor use patients are on the whole maintaining their quality of life after starting on a protease inhibitor containing regimen. Continued follow-up of this cohort will be required to determine the long term implications of these observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008985728271
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Gracilaria conferta and its epiphytes: 3. Allelopathic inhibition of the red seaweed byUlva cf.lactuca (1996)
    Springer
    Journal of applied phycology 8 (1996), S. 21-25 
    Details
    ISSN: 1573-5176
    Keywords: Gracilaria ; epiphytes ; allelopathy ; interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In a previous study (Svirski et al., 1993), it was found that growth inhibition ofGracilaria spp., when cultured in the presence ofUlva cf.lactuca, was not due to shading or nutrient depletion, but seemed to be caused by competition for inorganic carbon or some type of allelopathy. In the present study, we attempted to differentiate between these two possible influences by (1) growing the two algae in biculture under various conditions, but keeping inorganic carbon levels constant and measuring net photosynthesis, respiration and growth rates, and by (2) measuring growth rates ofGracilaria spp. in the presence of extracts derived from media previously used to growUlva cf.lactuca. Both net photosynthesis and growth rates ofGracilaria spp. in biculture were inhibited, despite CO2 (and also HCO3 −) levels being kept constantly high in the culture media. It is likely that these responses were due to markedly enhanced rates of dark respiration inGracilaria spp. when grown together withUlva cf.lactuca. Growth ofGracilaria spp. was also inhibited by extracts derived from seawater in whichUlva cf.lactuca had previously been grown. The strong inhibition by ethyl acetate and chloroform extracts indicate an allelopathic effect onGracilaria spp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02186217
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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