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  • 1
    Electronic Resource
    Electronic Resource
    Increased glucose carbon recycling in severely insulin deficient Type 1 (insulin-dependent) diabetic subjects (1990)
    Springer
    Diabetologia 33 (1990), S. 158-162 
    Details
    ISSN: 1432-0428
    Keywords: Diabetes mellitus ; insulin-dependent ; glucose recycling ; glucose ; insulin ; Cori cycle ; isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Six Type 1 (insulin-dependent) diabetic subjects were studied in order to determine the contribution of recycling of glucose carbon to the overproduction of glucose which is characteristic of the fasting hyperglycaemia produced by insulin withdrawal. The subjects were studied on two occasions, once after an overnight insulin infusion and once following 24 h of insulin withdrawal. The difference in turnover rates of 1-14C-glucose and 3-3H-glucose was used as a measure of glucose recycling. Insulin withdrawal caused a marked metabolic derangement with a rise in non-esterified fatty acids from 0.69±0.23 to 1.11±0.21 mmol/l (mean±SEM, p〈0.05), total ketones from 0.27±0.06 to 2.06±0.51 mmol/l (p〈0.01), cortisol from 341±43 to 479±31 nmol/l (p〈0.05) and growth hormone from 1.1±0.3 to 19+5-mu/l (p〈0.05). Glucose turnover rose from 13.8±2.3 μmol·kg−1·min−1 at a glucose of 6.9±0.7 mmol/l in the insulin infused study to 25.8±4.4 μmol·kg−1·min−1 (p〈0.05) at a glucose of 16.4±0.7 mmol/l in the insulin withdrawn study. Recycling also rose from 3.0±0.4 μmol· kg−1·min−1 to 9.4±2.2 μmol·kg−1·min−1 (p〈0.05) when insulin withdrawn, accounting for 23±3% and 36±3% of glucose turnover, respectively. We conclude that in the severely insulin deficient Type 1 diabetic subject recycling of glucose carbon is a major contributor to the excess glucose production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00404043
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Variations in skinfold thickness during de-acclimatisation and re-acclimatisation to high altitude (1987)
    Springer
    European journal of applied physiology 56 (1987), S. 570-576 
    Details
    ISSN: 1439-6327
    Keywords: Skinfold thickness ; Body fat ; Density ; Segment volumes ; High altitude
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Skinfold thickness, body weight, body water, anthropometric measurements and segment volumes were determined in 28 young and healthy Indian soldiers on return to Delhi (200 m) after staying for more than 24 months at high altitude (3500 m). The measurements were made on the 2nd day and after 3 weeks. Ten subjects were then randomly selected from this group and returned by air to the high-altitude station, and the measurements were repeated on the 3rd and 12th day of their reinduction. Though body weight and total body water increased marginally on transfer to the lower altitude, body density remained more or less unchanged. There were significant increases in the thickness of skinfolds, even when body density had increased. During this period hand and foot volumes decreased significantly. Despite significant increases in thoracic skinfold thickness, the torso volume decreased slightly. On returning to high altitude, the soldiers lost body weight, were hypohydrated and showed reduced skinfold thickness. Fat losses calculated on the basis of reduction in skinfold thickness were far in excess of those calculated from losses in body weight and in total body water. As the reduced skinfold thickness was unrelated to changes in body water content at high altitude, it seems that such reductions are due to redistribution of blood in the skin. From the results of these investigations it is concluded that variations in skinfold thickness during acclimatisation to high altitude do not accurately represent the changes in body fat content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00635372
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Strain-specific salt tolerance and chemotaxis ofAzospirillum brasilense and their associative N-fixation with finger millet in saline calcareous soil (1991)
    Springer
    Plant and soil 137 (1991), S. 55-59 
    Details
    ISSN: 1573-5036
    Keywords: Azospirillum brasilense ; chemotaxis ; Eleusine coracana ; nitrogenase activity ; root exudates ; salt tolerant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Three salt-tolerantAzospirillum brasilense strains were isolated from the roots of finger millet grown in saline calcareous soil and characterized. The effect of various salts on growth and N2ase activity of these strains was tested and strain STR1 was found more tolerant at higher concentrations of Cl-, SO4 2 and HCO3 -. Bicarbonate was found to be the most toxic. The content and concentrations of root exudates of finger millet genotypes were different and chemotaxis to sugars, amino acids, organic acids and root exudates was strain specific. Under salt stress, significant interactions between strains and genotypes of finger millet resulted in different responses of N2ase activity, endo- and exorhizospheric population, dry weight of root, shoot and grain yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02187432
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    Paper (German National Licenses)
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