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  • 1
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In this preliminary study, 120 cord blood samples were subjected to a simple on-the-ward triglyceride screening procedure and 15 were designated as being high and another 15 randomly selected as controls. All the samples were then subjected to detailed biochemical analysis for fatty acid profiles and/or concentrations of free fatty acids, triglycerides (TG), phospholipids, cholesterol esters and glycerol. Eleven of the samples designated ‘high’ were associated with one or more of the following clinical conditions: family history of ischaemic heart disease, maternal starvation, fetal distress, light-for-dates babies and excessive weight gain during pregnancy. There was an association between high TG levels and high glycerol levels. The fatty acid pattern of the TG was altered when at abnormally high concentration, in particular oleic acid was increased relative to the others, and this was associated with an increase in cholesterol ester oleic acid. The possible mechanisms resulting in cord hypertriglyceridaemia are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Field measurements of CO2 and water vapor exchange were made on Atriplex hymenelytra (Torr.) Wats. shrubs growing in Death Valley, California during March 1971 and July 1972. Rates of CO2 uptake and leaf conductances were substantially higher in March as compared to July. In spite of the large differences in ambient temperatures in March and July, no adaptive acclimation response was apparent in the temperature dependence of photosynthesis. Photosynthesis transpiration ratios at typical midday leaf temperatures were much higher in March than in July. High water use efficiency results from a combination of the C4 photosynthetic pathway, relatively low leaf conductances, and maximum growth and photosynthetic activity during the cooler months of the year.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Oecologia 19 (1975), S. 293-301 
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The photosynthetic response of Heteromeles arbutifolia, a California evergreen shrub, was measured in natural habitats representing both the climatic center of distribution and the southern warm arid extreme of this species. At all sites the seasonal carbon gain was limited primarily by available water, secondarily by photoperiod, and only slightly by temperature. Thus, the warmer winter temperatures at the southern habitat would not result in a carbon gain sufficient to offset losses due to the longer drought there. It is thus postulated that the competitive advantage of evergreens over drought deciduous types is often limited at these arid habitats.
    Type of Medium: Electronic Resource
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