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  • 1995-1999
  • 1980-1984  (1)
  • 1970-1974  (1)
  • 1900-1904
  • 1983  (1)
  • 1973  (1)
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  • 1995-1999
  • 1980-1984  (1)
  • 1970-1974  (1)
  • 1900-1904
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  • 1
    Electronic Resource
    Electronic Resource
    The regulation of feeding in Locusta migratoria: Internal inhibitory mechanisms (1973)
    Springer
    Entomologia experimentalis et applicata 16 (1973), S. 329-342 
    Details
    ISSN: 1570-7458
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Alle Hauptnerven des Mund- und Rachennervensystems wurden kontrolliert reseziert. Erst wenn die rückwärtigen Rachennerven zerschnitten werden, nehmen die Insekten wesentlich mehr Nahrung zu sich. Solche Insekten versuchen längere Zeit zu fressen. Wenn sich während des Fressens der Vorderdarm füllt, wird keine Nahrung an den Mitteldarm weitergegeben und sein Vorderende ist der letzte Teil, der sich vollständig ausdehnt. Nach Durchtrennung der rückwärtigen Rachennerven sind alle Teile des Vorderdarms offen-sichtlich mehr gedehnt. Eine solche erhöhte Nahrungsaufnahme tritt aber nicht ein, wenn die Nahrung relativ ungünstig ist. Das Abbinden des Kropfes verursacht beim nachträglichen Fressen keine übermäßige Ausdehnung des Vorderteiles. Die Nahrungsaufnahme hat keinen Unterschied im Körpervolumen zur Folge und das Durchtrennen des ventralen Nervenstranges bleibt ohne Einfluß auf die nachträglich aufgenommenen Nahrungsmengen. Das vergrößerte Darmvolumen wird durch Kollaps des Luftsackes kompensiert.
    Notes: Abstract During the course of a meal by insects with an empty gut, food is held in the foregut and the midgut remains empty. The last part of the foregut to fill is the extreme anterior end of the crop, and stretch receptors in this region control the amount eaten. Cutting the posterior pharyngeal nerves isolates these receptors from the frontal garglion and results in hyperphagia pharyngeal nerves isolates these receptors from the frontal garglion and results in hyperphagia during one meal. On unfavourable food, when smaller amounts are eaten, distension of the foregut is not involved in regulating meal size. Feedback from receptors in the body wall is not important in regulating meal size; most of the increase in gut volume resulting from feeding is taken up by the collapse of the air sacs so that there is little or no change in the body volume.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00334244
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Acute and chronic effects of alcohol on iron absorption (1983)
    Springer
    Digestive diseases and sciences 28 (1983), S. 321-327 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The absorption of nonheme59ferric chloride from a test meal was measured, using a whole-body counter, in 34 alcoholics with liver disease of varying severity, 30 of whom had normal hemoglobin values and four of whom were anemic. The results were compared with those obtained in five patients with iron-deficient anemia and nine healthy control subjects. There were no significant differences in mean percentage iron absorption (±sem) in the nonanemic alcoholic patients with fatty liver (14.6±3.7), alcoholic hepatitis (18.6±5.7), or cirrhosis (21.1±3.5) when compared with control subjects (22.0±2.5). Significantly increased mean percentage iron absorptions were seen, however, in the patients with iron-deficient anemia (64.8±5.6;P〈0.0001) and the alcoholics with anemia (60.7±7.8;P〈0.0001). There was an inverse relationship between iron absorption and serum ferritin concentration in the nonanemic alcoholics (r=−0.37;P〈0.025) but no correlation between iron absorption and liver iron concentration. The addition of absolute alcohol (0.5 g/kg body weight) to the test meal resulted in an increase in mean percentage iron absorption in eight control subjects (21.6±1.6 to 29.0±6.1) and in ten nonanemic alcoholics (15.8±3.2 to 20.0±3.8), although these differences did not achieve significance. Similarly when intravenous alcohol was given to four control subjects at the time of the test meal, iron absorption increased in all four so that the mean percentage iron absorption increased, although not significantly, from 17.6±2.7 to 39.3±9.5. Iron absorption in alcoholics does not differ significantly from normal. While the increased liver iron concentrations seen in approximately one third of alcoholics cannot be attributed to an increase in iron absorption as a result of chronic alcohol ingestion, further studies are needed to elucidate the acute effects of alcohol on iron absorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01324948
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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