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  • Substance P  (2)
  • Josephson tunneling  (1)
  • 1
    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
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 261 (1968), S. 329-337 
    ISSN: 1432-1912
    Keywords: Substance P ; Physalaemine-Derivatives ; Parotid Gland ; Submandibular Gland ; Substanz P ; Physalämin-Derivate ; Speichelsekretion ; Parotis ; Submandibularis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. 1. Das Physalämin-ähnliche Octapeptid Pro-Asn-Lys-Phe-Tyr-Gly-Leu-Eti(NH2) sowie Substanz P wurden in die V. lienalis, V. femoralis und A. carotis von Hunden infundiert. Die Sekretionsmengen der Gl. parotis und der Gl. submandibularis wurden verglichen. 2. Die Gl. parotis reagierte schon auf niedrigere Dosen dieser Peptide, bei mittleren Dosen mit größerer Sekretion als die Gl. submandibularis. Gegenüber Carbachol verhielten sich die Drüsen umgekehrt. 3. Die Wirkung kleiner Dosen der Peptide auf die Gl. parotis war stets bei femoraler größer als bei portaler Infusion. Es wird gefolgert, daß die beiden Peptide in der Leber inaktiviert werden. 4. Peptidmengen, die bei Infusion in die A. carotis ipsilateral zu maximaler Sekretion führten, lösten auch auf der Gegenseite eine Sekretion der Parotis aus. Diese Wirkung auf die Parotis der Gegenseite war jedoch schwächer als bei Infusion derselben Dosis in die V. femoralis; ein Teil des Peptides scheint also während der Passage durch das Carotis-Gebiet zu verschwinden.
    Notes: Summary 1. The physalaemine-like octapeptide Pro-Asn-Lys-Phe-Tyr-Gly-Leu-Eti(NH2) and substance P were infused into the V. lienalis, V. femoralis and A. carotis of the dog. The secretion of the parotid and submandibular glands were compared. 2. The parotid gland responded to lower doses and produced larger amounts of secretion than the submandibular gland. The glands responded in the reverse order to carbachol. 3. Infusion of the peptide into the femoral vein elicited a greater secretion from the parotid gland than the infusion of the same doses into the splenic vein; it can be concluded that an inactivation of the peptide takes place in the liver. 4. Intracarotid infusion of the peptide in amounts which produced maximal secretion of the ispilateral gland also caused a contralateral secretion. The effect on the contralateral side was smaller than that of the same dose infused into the femoral vein; part of the peptide seems to dissappear during passage through the carotid circulation.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of superconductivity 12 (1999), S. 783-787 
    ISSN: 1572-9605
    Keywords: Josephson tunneling ; mesoscopic systems ; quantum dissipative systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We study exact self-duality in the model of a Brownian particle in a washboard (WB) potential which describes a Josephson junction (JJ) coupled to an environment, for arbitrary temperature and arbitrary form of the spectral density of the environment. To this end we introduce the quantum dissipative Villain model (QDVM), which models tunneling of a degree of freedom coupled to a linear quantum environment through an infinite set of states. We derive general exact mappings on various dual discrete representations (one-dimensional Coulomb gases or surface-roughening models) which are exactly self-dual. Then we show how the QDVM maps exactly onto the WB model and use duality relations to calculate the leading terms of the total impedance of a JJ circuit, for general frequency dependence of the spectral density of the environment and arbitrary temperature.
    Type of Medium: Electronic Resource
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