Titlebook: Meß- Steuerungs- Regelungstechnik; Formeln, Daten und B Thomas Krist Book 1997Latest edition Springer Fachmedien Wiesbaden 1997 Datenverarb

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978-3-528-04974-4Springer Fachmedien Wiesbaden 1997

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Regelungstechnik, anderen Größe im Sinne einer Angleichung an diese Größe beeinflußt wird. Bei der Regelung sind somit zwei miteinander verknüpfte Vorgänge zu verwirklichen: Vergleichen und Stellen (Verstellen). Der hierzu notwendige Wirkungsablauf vollzieht sich in einem geschlossenen Kreis — dem ..

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usly being replaced by proliferation of more primitive cells. These tissues are composed of a hierarchy of cells: at one end of the hierarchy are stem cells which are less differentiated and can divide without limit; at the other end are mature cells which are highly differentiated and have no capac

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Thomas Kristntrol the function of this gland. Research on control of luteal function has encompassed a broad spectrum of mammalian taxa and has evolved from early studies to identify the source and nature of controlling factors to present day attempts to resolve their action at the level of the luteal cell. Fro

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Thomas Kristp of the hypothaiamo-pituitary-gonadal axis is well established. In 1932, Moore and Price proposed that a tight reciprocal relationship between the gonad and the pituitary was responsible for maintaining gonadal function in the adult rat (Fig. 1). Intensive investigations over the intervening years

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Thomas Kristosphate transport by the renal tubule, Troehler, Bonjour and Fleisch (1) and Steele and DeLuca (2) showed that phosphate deprivation results in marked increases in phosphate transport which were independent of plasma phosphate and parathyroid hormone. Further, rats fed a low phosphate diet provide a

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Thomas Kriste and adenine nucleotides in energy transport. The classical viewpoint (Fig. 1) regards CPK as a near equilibrium enzyme buffering cytosolic changes in nucleotide concentration (1,2), with creatine phosphate representing a reservoir of high energy phosphate equivalents (3) and with regulation of ene

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Thomas Krist that the active form of the vitamin, 1,25-dihydroxycholecalciferol [1,25-(OH).D.], enhances, by an unknown mechanism, the intestinal absorption of phosphate.. The effect of 1,25-(OH).D. on the reabsorption of phosphate in the kidney is less clear. In some studies, infusion of the vitamin has been f