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  • Selenium  (7)
  • Normal values  (2)
  • Activation analysis  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Selenium and myocardial infarction: Glutathione peroxidase in platelets (1981)
    Springer
    Journal of molecular medicine 59 (1981), S. 817-818 
    Details
    ISSN: 1432-1440
    Schlagwort(e): Selenium ; Glutathione peroxidase ; Platelets Thrombosis ; Myocardial infarction ; Selen ; Glutathionperoxidase ; Thrombozyten ; Thrombose ; Herzinfarkt
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die Aktivität des Selenenzyms Glutathionperoxidase (EC 1.11.1.9) wurde in den Blutplättchen von 15 Patienten mit frischem Herzinfarkt und 13 Kontrollpersonen gemessen. Die Blutplättchen der Patienten zeigten signifikant niedrigere Enzymaktivitäten (P(t)〉0.99). Möglicherweise steht dies mit der Erkrankung in pathogenetischem Zusammenhang.
    Notizen: Summary The activity of the selenoenzyme glutathione peroxidase (EC 1.11.1.9) was determined in platelets of 15 patients with acute myocardial infarction and 13 control subjects. The platelets of the patients had significantly lower activities of the enzyme (P(t)〉0.99). This may be related to the pathogenesis of the disease.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01724689
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  • 2
    Digitale Medien
    Digitale Medien
    Selenium content of human milk, cow's milk and cow's milk infant formulas (1978)
    Springer
    European journal of pediatrics 129 (1978), S. 139-145 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Human milk ; Cow's milk ; Cow's milk infant formula
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The selenium content of human milk, cow's milk and cow's milk infant formula were estimated by instrumental neutron activation analysis. The highest values were found in 3 samples of human colostrum (524–865×10-9 g/g dry weight). There was a significant decrease with increasing time post partum. Mature human milk exhibited a selenium content of 230±79×10-9 g/g dry weight. The selenium content of 45 samples of cow's milk from the north-western area of Germany was 200±39×10-9 g/g dry weight. While there was no significant difference between the values of mature human milk and of cow's milk, cow's milk infant formula exhibited significantly (P〈0.01) lower values than human milk. The average selenium content of 107 samples of 10 different commercially available fluid and powdered cow's milk infant formulas (range: 18–171×10-9 g/g dry weight) amounted to about only one third of that in mature human milk.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00442157
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  • 3
    Digitale Medien
    Digitale Medien
    Selenium requirements in patients with inborn errors of amino acid metabolism and selenium deficiency (1980)
    Springer
    European journal of pediatrics 134 (1980), S. 65-68 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Glutathione peroxidase ; Selenium deficiency ; Selenium supplementation ; Nutrition
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The diets of 5 patients with phenylketonuria or maple-syrup-urine disease were supplemented with yeast which was rich in selenium. For 120 days the patients received 45 μg Se/day to increase the Se content of their diets to 10–12ng Se/Kjoule. Before supplementation the selenium content of serum (5–15 ng/ml) and whole blood (10–27 ng/ml), and the activity of the erythrocyte glutathione peroxidase (0.19–2.69 U37/g Hb), amounted to only 10–20% of normal. The serum selenium content reached normal values within 4 weeks of supplementation, followed by normalisation of the selenium content of whole blood within 4–8 weeks. Restoration of the activity of erythrocyte glutathione peroxidase took 9 to 15 weeks —the red cell life span. There was a significant positive correlation between the selenium content of the erythrocytes and the activity of erythrocyte glutathione peroxidase.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00442405
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  • 4
    Digitale Medien
    Digitale Medien
    The selenium state of healthy children (1977)
    Springer
    European journal of pediatrics 125 (1977), S. 81-88 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Glutathione peroxidase ; Normal values ; Blood ; Infants ; Children ; Milk ; Nutrition
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The selenium concentration of serum is age-dependent. The median value at birth ( $$\tilde x$$ =50×10−9g/ml) amounts to half of the median value of adults ( $$\tilde x$$ =102×10−9g/ml). After a decrease in early infancy to $$\tilde x$$ =34×10−9g/ml it steadily increases to $$\tilde x$$ =58×10−9g/ml in the second half of the first year, to $$\tilde x$$ =82×10−9g/ml in 1–5 year old children, and to $$\tilde x$$ =92×10−9g/ml in school children. The activities of the selenium containing enzyme glutathione peroxidase of erythrocytes are also reduced in early infancy (x=7.2±0.36 U37/g Hb), whereas the enzyme activities of cord blood erythrocytes (x=8.72±0.76 U37/g Hb) are in the same range as those of older children or adults. The selenium content of some commercially available milk formulas for infants are lower than those of human and cow's milk.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00470608
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  • 5
    Digitale Medien
    Digitale Medien
    Selenium intake of infants and young children, healthy children and dietetically treated patients with phenylketonuria (1984)
    Springer
    European journal of pediatrics 143 (1984), S. 99-102 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Intake ; Children ; Phenylketonuria
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract In 20 healthy infants and children, 5–20 months old, the Se intake was estimated by analysing food samples by instrumental neutron activation analysis. The intake was calculated by weighing the portions offered and actually consumed. The median Se content of the food amounted to 27 ng/g wet weight (gww) and median daily Se intake to 33.5 μg. The Se intake was not equally distributed over the day. About 50% of the daily Se intake was derived from the supper. The main Se sources (41%) for young children were cereal paps. Commercially, available meals (30 ng/g) contained less Se than home-made ones (50 ng/g). In nine dietetically treated patients with phenylketonuria the median Se intake amounted only to 6.9 μg/day corresponding to a mean Se content of the diet of 7.9 ng/g. The main Se source in the diet was vegetables (36.3%) and 20% derived from their protein supplements. The Se intake of young children, healthy or dietetically treated, cannot be calculated accurately from tables but must be estimated by measuring the Se content of the local food because cereals and vegetables-the main Se sources-exhibit great regional variations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00445794
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  • 6
    Digitale Medien
    Digitale Medien
    The selenium state of children (1978)
    Springer
    European journal of pediatrics 128 (1978), S. 213-223 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Gluthathione peroxidase ; Dietotherapy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The selenium content of serum, whole blood and hair was measured by neutron activation analysis in dietetically treated patients with phenylketonuria (PKU) and maple-syrup-urine disease (MSUD). Follow-up studies showed a decrease of the serum selenium content and the glutathione peroxidase activity of erythrocytes—a selenoenzyme—from normal values at the beginning of the diet to 20% (selenium) and 50% (gluthione peroxidase) of normal within 10–12 weeks of dietary treatment. In 36 patients the serum selenium content was lower at 6.7–28×10-9 g/ml, independent of the age of the patients (0.5 to 10 years). The selenium content of whole blood was reduced: median=98×10-9 g/g dry weight; range 75 to 165×10-9 g/g dry weight (healthy children: median=381×10-9 g/g dry weight; range 245 to 588×10-9 g/g dry weight). The selenium content of hair was markedly lower in the patients (median=62×10-9 g/g; range 13–140×10-9 g/g) than in healthy children (median=429; range 213 to 720×10-9 g/g). The mean glutathione peroxidase activity of erythrocytes was reduced to 4.6±0.64 U37/g Hb, in comparison to normal values (mean=8.8±0.88 U37/gHb).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00445606
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  • 7
    Digitale Medien
    Digitale Medien
    Hair selenium content during infancy and childhood (1982)
    Springer
    European journal of pediatrics 139 (1982), S. 295-296 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Selenium ; Hair ; Infants ; Children
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Hair selenium content was estimated by instrumental neutron activation analysis in Libyan infants and children. There was no significant difference between the values of young infants from North and South Libya. The hair selenium content rapidly decreased from 1071 ±75 ng/g in newborns to 301±99 ng/g in 7–10 months old infants in North Libya and to 557±204 ng/g in South Libya. In North Libya the values of preschool children were 409±117 ng/g and those of school children 464±124 ng/g.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00442184
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  • 8
    Digitale Medien
    Digitale Medien
    Serum zinc concentration during childhood (1977)
    Springer
    European journal of pediatrics 126 (1977), S. 199-202 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Zinc ; Serum ; Normal values ; Children ; Infants ; Cord blood ; Adults
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Serum zinc concentrations in subjects of different ages were estimated by neutron activation analysis to obtain reliable reference values for the diagnosis of primary or secondary zinc deficiency during childhood. In these healthy individuals a small age-dependent variation of the mean values was found. Serum zinc concentrations were lower in cord blood (mean value: 880×10−9 g/ml) and in infants (mean value: 820×10−9 g/ml) than in adults (mean value 1178×10−9 g/ml). In comparison to these values, the serum zinc concentration in a patient with secondary zinc deficiency and 4 patients with acrodermatitis enteropathica was reduced to about 25% of normal.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00477045
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  • 9
    Digitale Medien
    Digitale Medien
    Neutronenaktivierungsanalytische Bestimmung von Kobalt und Calcium bei der experimentellen Herzinsuffizienz durch Kobaltchlorid (1969)
    Springer
    Clinical and experimental medicine 150 (1969), S. 316-324 
    Details
    ISSN: 1591-9528
    Schlagwort(e): Aktivierungsanalyse ; Kobalt und Calcium ; Herzinsuffizienz ; Ratten ; Activation analysis ; Cobalt and calcium ; Cardiac failure ; Rats
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Der Gehalt an Kobalt und Calcium im Herzmuskel und in Mitochondrienfraktionen des Herzmuskels der Ratte wurde mit Hilfe der Neutronenaktivierungsanalyse bestimmt. Nach intraperitonealer Injektion von insgesamt 50–60 mg Kobaltchlorid während einer Periode von 10–12 Tagen stieg der Gehalt an Kobalt im Herzmuskel von normal 0,15 auf 10,7 μ/g. Gleichzeitig kam es zu einer Abnahme der Calciumkonzentration im Herzmuskel von normal 265 auf 148 μg/g. Der Calciumgehalt in den Mitochondrien änderte sich dagegen nicht. Die Verschiebung des Kobalt-Calcium-Quotienten unter Kobaltchloridbehandlung kann als zahlenmäßiger Ausdruck der einsetzenden Herzinsuffizienz gewertet werden.
    Notizen: Summary Concentrations of cobalt and calcium in the myocardium and in myocardial mitochondria of the rat were determined using neutron activation analysis. After intraperitoneal injections of a total dose of 50–60 mg CoCl2 during a period of 10–12 days the content of cobalt in the myocardium increased from normal 0.15 to 10.7 μg/g. At the same time calcium concentrations in the myocardium decreased from normal 265 to 148 μg/g. The calcium content of the mitochondria did not change. The shift in the ratio cobalt/calcium during treatment with CoCl2 may be quantitatively related to the resulting cardiac failure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02044450
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