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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diabetologia 15 (1978), S. 87-90 
    ISSN: 1432-0428
    Keywords: Bone mineral content ; osteopenia ; diabetes mellitus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Bone mineral content was measured by photon absorptiometry in 215 insulin treated diabetic out-patients aged 7–70 years. As bone mass increases until the age of 20–25 years, patients were so selected that all remained within the same phase of bone mineral storage throughout the entire course of their diabetes. Other criteria for exclusion were diseases or drugs interfering with mineral metabolism and previous use of oral antidiabetic agents. As a group the patients demonstrated a bone mineral deficit of 9.8% compared with sex- and age-matched controls (P〈0.001). Comparison between patients who had developed diabetes before the age of 20 years and after that of 25 years revealed deficits of 14% and 7%, respectively (P〈0.001). Sex differences were not observed. The initiation of osteopenia seemed to coincide with the onset of clinical diabetes mellitus, and significantly reduced bone mineral content was observed after 2 years of diabetes (P〈0.001). After 3–5 years the osteopenia appeared to attain a stable level.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Bone mineral content ; diabetes mellitus ; diabetic control ; insulin secretion ; insulin dosage ; fasting blood glucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The significance of different risk factors for the development of bone loss in diabetes mellitus was evaluated in a cross sectional study of 215 insulin treated diabetic outpatients. Bone mineral content in the forearms was measured by photon absorptiometry and the metabolic status was evaluated by three indices: residual B-cell function, insulin dosage and fasting blood glucose. The mean bone mineral content was reduced to 90.2% of sex- and agematched normal mean values (P〈0.001). Stratification of the patients showed that bone mineral content was 99.3% of that found in sex- and age matched normal subjects in the group with residual B-cell function, low insulin dosage and low fasting blood glucose; it was only 79.3% of normal in the group with no detectable insulin secretion, high insulin dosage and more severe hyperglycaemia. Thus, residual insulin secretion and the quality of metabolic control are major factors in determining bone mineral content in insulin treated diabetic patients.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0495
    Keywords: Key words Nutrient dynamics ; Sedimentation ; Resuspension ; Scandinavia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The yearly nutrient supply from land and atmosphere to the study area in SW Kattegat is 10 900 tons of N and 365 tons of P. This is only few percent of the supply from adjacent marine areas, as the yearly transport through the study area is 218 000 tons of N and 18 250 tons of P. Yearly net deposition makes up 1340 tons of N (on average 2.5 g m–2 yr–1) and 477 ton of P (on average 0.9 g m–2 yr–1). Shallow-water parts of the study area have no net deposition because of frequent (〉35% of the year) resuspension. Resuspension frequency in deep water is 〈1% of the year. Resuspension rates, as averages for the study area, are 10–17 times higher than net deposition rates. Because of resuspension, shallow-water sediments are coarse lag deposits with small amounts of organic matter (1.1%) and nutrients (0.04% N and 0.02% P). Deep-water sediments, in contrast, are fine grained with high levels of organic matter (11.7%) and nutrients (0.43% N and 0.15% P). Laboratory studies showed that resuspension changes the diffusive sediment water fluxes of nutrients, oxygen consumption, and penetration into the sediment. Fluxes of dissolved reactive phosphate from sediment to water after resuspension were negative in organic-rich sediments (13.2% organic matter) with low porosity (56) and close to zero in coarse sediments with a low organic matter content (2.3%) and high porosity (73). Fluxes of inorganic N after resuspension were reduced to 70% and 0–20% in relation to the rates before resuspension, respectively.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 35 (1983), S. 708-711 
    ISSN: 1432-0827
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 36 (1984), S. 269-273 
    ISSN: 1432-0827
    Keywords: Bone loss (osteopenia) ; Calcium ; Corticosteroids (glucocorticosteroids) ; Fluoride ; Vitamin D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary To evaluate the effect of prednisone and triple treatment (sodium fluoride, calcium, and vitamin D) on trabecular and cortical bone serial bone mineral content (BMC) measurements were made at a metaphyseal (BMCD) and diaphyseal (BMCP) site on the forearm on 31 consecutive and previously bone-healthy patients scheduled for at least 24 weeks high-dose prednisone treatment. The patients were randomized into two further treatment groups: group I (n=16) received prednisone plus triple treatment and group II (n=15) received only prednisone. The two groups were similar with regard to age, sex, prednisone dose, and initial BMC. During 24 weeks treatment, BMCD (partially representing trabecular bone) and BMCP (mainly representing cortical bone) fell significantly and similarly, demonstrating that there is no preventive effect on bone mineral loss on the triple regimen. The BMC fall after 12 weeks was significantly more pronounced for metaphyseal (partially trabecular) than for diaphyseal (cortical) bone, whereas the values did not differ significantly after 24 weeks; this indicates a greater sensitivity to the hormone treatment of trabecular bone. In the entire group, the fall in BMC correlated positively with individual prednisone dose, significant at the diaphyseal site (r=0.39,P〈0.05), but not at the metaphyseal site (r=0.31, P=0.08). It is concluded that corticosteroid-induced osteopenia is a diffuse bone disease which affects trabecular as well as cortical bone, suggesting that BMC measured on the forearm reflects changes in bone mineral at other locations.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0827
    Keywords: Osteoporosis ; Menopause ; Estrogen ; Pyridinoline ; Bone resorption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Objective: To evaluate and compare the effects or oral and transdermal estrogen replacement therapy on biochemical markers of bone resorption in early postmenopausal women Design: Controlled, randomized group comparison. Setting: Outpatient clinic for menopausal women and research into osteoporosis. Subjects: Sixty healthy women menopausal for less than 5 years and who had never received any medications interfering with bone metabolism. Interventions: The 60 women were randomly allocated to 3 months therapy with either oral conjugated estrogens (0.625 mg/day) (n = 28) or transdermal estradiol (50 jig/day) (n = 32) in cyclical combination with medroxyprogesterone acetate (5 mg/day). Main outcome measures: Traditional (urinary calcium/creatinine and hydroxyproline/creatinine) and the new specific (urinary pyridinoline/creatinine and deoxypyridinoline/creatinine) markers of bone resorption were determined before and after 3 months of treatment. Results: In both groups, circulating levels of estrone and estradiol were significantly (P 〈 0.001) increased during treatment. In women treated with oral conjugated equine estrogens, urinary calcium/creatinine and hydroxyproline/creatinine ratios were significantly (P 〈 0.05) reduced. Pyridinoline/creatinine ratio fell from 69.1 (4) [mean (SEM)] to 50 (4) μmol/μmol (P 〈 0.01) and deoxypyridinoline/creatinine ratio fell from 10.8 (1) [mean (SEM)] to 8.3 (0.8) μmol/μmol (P 〈 0.01). In the group treated with transdermal estradiol, urinary hydroxyproline/creatinine ratio was significantly (P 〈 0.05) reduced. Pyridinoline/creatinine ratio fell from 66.3 (4) [mean (SEM)] to 46.2 (3) μmol/μmol (P 〈 0.01) and deoxypyridinoline/creatinine ratio fell from 11.5 (1.5) [mean (SEM)] to 7.7 (0.6) μmol/μmol (P 〈 0.01). There were no differences between the evolution of the biochemical variables in the two groups. Conclusion: These results suggest that oral conjugated equine estrogens and transdermal estradiol, in the given doses, are equally effective in reducing postmenopausal bone resorption.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 143 (1984), S. 149-151 
    ISSN: 1432-1076
    Keywords: Total body bone mineral ; Mineralisation ; Male puberty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The bone mineral content of the distal forearm (BMC) using single-photon absorptiometry and total body bone mineral (TBBM) using dual-photon absorptiometry were determined in 19 normal boys at different pubertal stages. A highly significant correlation between BMC and TBBM was seen (r=0.78, P〈0.001) with a standard error of estimate (SEE) of 13%. Subgroups of early and late pubertal stages did not show any significant differences in the regression lines indicating an identical relationship between BMC and TBBM at various stages of pubertal development although great changes in bone mineral content take place. Due to high accuracy and reproducibility of both methods, which are non-invasive and harmless, measurement of BMC is suitable to estimate changes in total mineral content of the body. This may be of importance in various diseases with disturbance in growth and bone metabolism.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 603 (1980), S. 1-12 
    ISSN: 0005-2736
    Keywords: (Na^+ + K^+)-ATPase ; (Rectal gland) ; Detergent solubilization ; Glycerol protection
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 47 (1972), S. 524-530 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 52 (1973), S. 1426-1433 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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