Search Results - (Author, Cooperation:P. Ferretti)
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1Latest Papers from Table of Contents or Articles in PressH. Elderfield ; P. Ferretti ; M. Greaves ; S. Crowhurst ; I. N. McCave ; D. Hodell ; A. M. Piotrowski
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-08-11Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Articles: DFG German National LicensesStaff View
ISSN: 1471-4159Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Abstract: The presence of Chol-1, an antigen identified in the plasma membrane of cholinergic electromotor nerve terminals of Torpedo marmorata, was investigated in Torpedo electric organ after 3, 6, and 9 weeks’denervation. Denervation was monitored by the cessation of stimulus-evoked discharge potentials, by the reduction in nerve terminals seen morphologically, and by the decrease in ACh and ChAT contents. The content of ganglioside-bound sialic acid did not show any appreciable change with time. Some modification of ganglioside pattern on TLC was observed after 9 weeks’denervation. The presence of Chol-1 after denervation was assayed by its activity in inhibiting the selective complement-induced lysis of the cholinergic subpopulation of guinea pig cortical synaptosome which is mediated by the anti-Chol-1 antiserum. Denervation did not affect Chol-1 immunoreactivity although it did alter the distribution of the immunoreactivity among gangliosides. The possible significance of the results is discussed.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 0012-1606Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesIantomasi, T. ; Marraccini, P. ; Favilli, F. ; Vincenzini, M.T. ; Ferretti, P. ; Tonelli, F.
Amsterdam : ElsevierStaff ViewISSN: 0885-4505Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: MedicineType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 0309-1651Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 1432-0878Keywords: Synaptogenesis ; Acetylcholine receptor ; Gangliosides ; Heparan-sulphate protoglycan ; Cholinergic nerve terminal ; Torpedo marmorataSource: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Summary Synaptogenesis has been studied in the electric organ of embryonic Torpedo marmorata by use of two antisera directed against components of synaptic vesicles (anti-SV) and presynaptic plasma membranes (ap-anti-TSM), respectively. The anti-SV serum was previously shown to recognize a proteoglycan specific for synaptic vesicles. The ap-anti-TSM serum was raised to plasma membranes of synaptosomes derived from the electromotor nerve terminals and affinity-purified on electric-organ gangliosides. The vesicular antigen was first detectable at the 81-mm stage of development, which is 1–2 weeks earlier than the formation of morphologically mature presynaptic terminals, but is coincident with a rise in choline acetyltransferase levels and the ability of the electric organ to generate discharges. The gangliosidic antigen recognized by the ap-anti-TSM was first detectable on the ventral electrocyte surface at the 93-mm stage of development. This indicates that specific carbohydrate epitopes, not present on the growth cones, are expressed during maturation of the nerve terminal. The nerve terminal components recognized by these sera arose pari passu with neurite coverage of the ventral surface of the electrocyte, reaching a maximum in the adult. In contrast, postsynaptic aggregates of acetylcholine receptor, rendered visible with rhodamine-labeled α-bungarotoxin, arose previous to the presynaptic antigens, reaching a maximum surface density at 110 mm and then declining in the adult.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesBaumgarten, C. ; Braun, B. ; Court, G. ; Ciullo, G. ; Ferretti, P. ; Graw, G. ; Haeberli, W. ; Henoch, M. ; Hertenberger, R. ; Koch, N. ; Kolster, H. ; Lenisa, P. ; Nass, A. ; Pod'yachev, S.P. ; Reggiani, D. ; Rith, K. ; Simani, M.C. ; Steffens, E. ; Stewart, J. ; Wise, T.
Springer
Published 2002Staff ViewISSN: 1434-6079Keywords: PACS. 47.45.Dt Free molecular flows – 51.20.+d Viscosity, diffusion, and thermal conductivity – 29.25.Pj Polarized and other targetsSource: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract: The use of storage cells has become a standard technique for internal gas targets in conjunction with high energy storage rings. In case of spin-polarized hydrogen and deuterium gas targets the interaction of the injected atoms with the walls of the storage cell can lead to depolarization and recombination. Thus the number of wall collisions of the atoms in the target gas is important for modeling the processes of spin relaxation and recombination. It is shown in this article that the diffusion process of rarefied gases in long tubes or storage cells can be described with the help of the one-dimensional diffusion equation. Mathematical methods are presented that allow one to calculate collision age distributions (CAD) and their moments analytically. These methods provide a better understanding of the different aspects of diffusion than Monte Carlo calculations. Additionally it is shown that measurements of the atomic density or polarization of a gas sample taken from the center of the tube allow one to determine the possible range of the corresponding density weighted average values along the tube. The calculations are applied to the storage cell geometry of the HERMES internal polarized hydrogen and deuterium gas target.Type of Medium: Electronic ResourceURL: