Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Gallenblase  (1)
  • Heat capacities of liquids  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 11 (1989), S. 123-139 
    ISSN: 0392-6737
    Keywords: Heat capacities of liquids ; Functional analytic methods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si presentano i risultati di una formulazione basata sugli integrali di cammino applicata alla termodinamica di un sistema a due stati accoppiato agli elettroni di conduzione. Si mostra che l'usuale approssimazione di un gas diluito di «bounce» è inadeguata nel caso di debole smorzamento e basse temperature e si presenta pertanto un'appropriata generalizzazione. Il modo di valutare esattamente la funzione di partizione di un sistema a due stati debolmente smorzato è quello di generalizzare un singolo «bounce» a una classe di insiemi irriducibili di «bounce» multipli con interazioni interne e di considerare questi insiemi come un gas diluito. Si ricavano le espressioni per la funzione di partizione e per il calore specifico. Si discute anche il caso di un sistema a due stati in presenza di moderata asimmetria.
    Abstract: Резюме Приводятся результаты применения метода интегрирования по траекториям к термодинамике системы с двумя состояниями, связанной с электронами проводимости. Показывается, что стандартное приближение разжиженного газа не является адекватным для слабого затухания и при низких температурах. Предлагается соотаетствующее обобщение. Для выписления функции распределения для слабо затухающей системы с двумя состояниями необходимо обобщение рассматриваемого приближения для класса неприводимых кластеров с внутренними взвимодействиями, в затем рассматривать эти кластеры, как разжиженный газ. Приводятся количественные выражения для функции распределения и для удельной теплоёмкости. Так же обсуждается случай смещения.
    Notes: Summary The results of a path integral approach to the thermodynamics of a two-state system coupled to conduction electrons are presented. It is shown that the standard dilute bounce gas approximation is inadequate for weak damping and low temperatures and the appropriate generalization is presented. The strategy to evaluate exactly the partition function of a weakly damped two-state system is to generalize a single bounce to a class of irreducible multibounce clusters with internal interactions and to consider these clusters as a dilute gas. Quantitative expressions for the partition function and for the specific heat are presented. The case of a bias is also discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 260 (1968), S. 269-274 
    ISSN: 1432-1912
    Keywords: Substance P ; Physalaemin ; Gall Bladder ; Pancreatic Secretion ; Substanz P ; Physalämin ; Gallenblase ; Pankreas-Sekretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Substanz P-Extrakt aus Hirn (4150 E/mg Protein) und das Physalämin-ähnliche Peptid Pro-Asp(NH2)-Lys-Phe-Tyr-Gly-Leu-Eti-NH2 kontrahieren beim Hund die Gallenblase und stimulieren die Pancreas-Sekretion. Die Sekretion von Lebergalle bleibt konstant oder nimmt ab. Die Wirkung des Substanz P-Extraktes wird durch Inkubation mit Chymotrypsin zerstört. 2. Roher Substanz P-Extrakt aus Darm (22 E/mg Protein) wirkt wesentlich stärker als Hirnextrakt, wahrscheinlich wegen seines zusätzlichen Gehaltes an Sekretin und/oder Cholecystokinin. 3. Substanz P ist auch in diesen Wirkungen dem Physalämin und seinen Abkömmlingen sehr ähnlich.
    Notes: Summary 1. Substance P-extract from brain (4150 u/mg protein) and the physalaemin-like peptide Pro-Asp(NH2)-Lys-Phe-Tyr-Gly-Leu-Eti-NH2 contract the gall bladder and stimulate pancreatic secretion in the dog. Hepatic bile flow remains constant or is decreased. The activity of the substance P-extract is destroyed by incubation with chymotrypsin. 2. Crude substance P-extract from the intestine (22 u/mg protein) is much more effective than brain extract, probably because of its additional content of secretin and/or cholecystokinin. 3. In these actions, as in others, a close similarity between substance P and physalaemin derivatives is evident.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...