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  • 27.60.+j  (32)
  • Immunocytochemistry  (32)
  • Calcium
  • Springer  (82)
  • PANGAEA
  • 1990-1994  (82)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Role ofh 11/2 protons in144Pm (1993)
    Springer
    The European physical journal 345 (1993), S. 119-120 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.En ; 23.20.Lv ; 23.20.Nx ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High spin states of the N=83 nucleus144Pm have been studied using the reaction130Te(19F,5n) and the techniques of gamma-ray and conversion electron spectroscopy. Empirical shell model calculations indicate that three observed states with J=14, 15 and 16 haveπh 11 2/2 configurations. This is the first observation ofπh 11 2/2 states in a Z〈64, N=83 nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290346
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  • 2
    Electronic Resource
    Electronic Resource
    Superdeformation in142Eu (1994)
    Springer
    The European physical journal 348 (1994), S. 251-253 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Re ; 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A rotational band with 15 transitions has been observed in142Eu in an experiment with the GASP Ge detector array by the110Pd(37Cl,5n) reaction. The average energy spacing between the neighbouring transitions is 60 keV, which is similar to the energy spacings in the superdeformed bands in the mass 140 region. The band has a constant dynamic moment of inertia as suggested by Cranked Shell Model calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01305880
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  • 3
    Electronic Resource
    Electronic Resource
    First observation of low lying states in the doubly odd nucleus132Pr from beta decay of132Nd (1994)
    Springer
    The European physical journal 349 (1994), S. 3-4 
    Details
    ISSN: 1434-601X
    Keywords: 23.20.Lv ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The lowlying level scheme of the oddodd nucleus132Pr has been investigated for the first time. The radioactive nuclei were produced by bombarding96Mo targets with 225 MeV40Ca beam. Levels have been populated from the132Nd β- decay. A new value of its halflife has been measured: T1/2=88±7 s. The mass identification has been made with an ionguide coupled with an online isotope separator. γ- γ- t, X-γ-t and e−-γ-t coincidence measurements have been performed. The observed distribution of the level feedings is similar to that of the neighbouring odd-odd nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01296324
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  • 4
    Electronic Resource
    Electronic Resource
    Calcium plays a central role in phase shifting the ocular circadian pacemaker of Aplysia (1994)
    Springer
    Journal of comparative physiology 175 (1994), S. 415-423 
    Details
    ISSN: 1432-1351
    Keywords: Aplysia ; Calcium ; Circadian ; Light ; Serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The eye of the marine mollusk Aplysia californica contains an oscillator that drives a circadian rhythm of spontaneous compound action potentials in the optic nerve. Both light and serotonin are known to influence the phase of this ocular rhythm. The aim of the present study was to evaluate the role of extracellular calcium in both light and serotonin-mediated phase shifts. Low calcium treatments were found to cause phase shifts which resembled those produced by the transmitter serotonin. However, unlike serotonin, low calcium neither increased ocular cAMP levels nor could these phase shifts be prevented by increasing extracellular potassium concentration. Low calcium-induced phase shifts were prevented by the simultaneous application of the translational inhibitor anisomycin and low calcium treatment resulted in changes in [35S]methionine incorporation into several proteins as measured by a two-dimensional electrophoresis gel analysis. Finally, light treatments failed to produce phase shifts in the presence of low calcium or the calcium channel antagonist nickel chloride. These results are consistent with a model in which serotonin phase shifts the ocular pacemaker by decreasing a transmembrane calcium flux through membrane hyperpolarization while light-induced phase shifts are mediated by an increase in calcium flux.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00199249
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  • 5
    Electronic Resource
    Electronic Resource
    Amelioration of subsoil acidity in an Oxisol of the humid tropics (1993)
    Springer
    Biology and fertility of soils 15 (1993), S. 153-159 
    Details
    ISSN: 1432-0789
    Keywords: Calcium ; Maize ; Nitrogen ; Brazilian Amazon ; Cation leaching ; Canavalia ensiformes ; Mucuna aterrima
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This work investigated the effectsof amendments of fertilizer N and lime on subsoil acidity and maize rooting depth in an acid soil of the central Amazon basin. A split-plot designed field experiment was conducted on a clayey Oxisol (Typic Acrudox) during a 16-month period. Main plots received 0 or 4 Mt ha-1 of lime. Subplots were four crop sequences: (1) Maize-green manure (Canavalia ensiformes); (2) maize-green manure (Mucuna aterrima); (3) maize-bare fallow, with the maize receiving 300 kg ha-1 of urea-N; and (4) bare fallow, with an application of 300 kg ha-1 of urea-N at the same time as sequence 3. Plots were periodically sampled to 1.2 m. The experimental site received 4265 mm of precipitation during 16 months; approximately 60%–90% of this rain percolated through the profile. Substantial amounts of Ca were leached from the 0–30 cm horizon during the experimental period, but only limited amounts accumulated in the subsoil. Base saturation below 45 cm was less than 50% at the end of the experiment regardless of lime treatment. Roots of maize were concentrated in the 0–30 cm layers in limed plots and the 0–20 cm layers in unlimed plots. In all treatments less than 5% of the roots was found below 50 cm. An acidity balance indicated that considerable acidity was leached below the plow layer and out of the profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336435
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  • 6
    Electronic Resource
    Electronic Resource
    Functional morphology of the light yellow cell and yellow cell (sodium influx-stimulating peptide) neuroendocrine systems of the pond snail Lymnaea stagnalis (1994)
    Springer
    Cell & tissue research 275 (1994), S. 361-368 
    Details
    ISSN: 1432-0878
    Keywords: Sodium influx-stimulating peptide, mollusc ; Neuroendocrine cells, mollusc ; Light yellow cells ; Yellow cells ; In situ hybridization ; Immunocytochemistry ; Osmoregulation ; Lymnaea stagnalis (Mollusca)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Neuroendocrine light yellow cells of the pond snail Lymnaea stagnalis express a neuropeptide gene encoding three different peptides. The morphology of the cell system has been studied by in situ hybridization, using two synthetic oligonucleotides encoding parts of light yellow cell peptides I and III, and by immunocytochemistry with antisera to synthetic light yellow cell peptide II and to two fragments of light yellow cell peptide I. One large cluster of light yellow cells was observed in the ventro-lateral protrusion of the right parietal ganglion, smaller clusters lying in the posterior dorsal part of this ganglion and in the visceral ganglion. The cells had an extended central neurohaemal area. Immunopositive axons projected into all nerves of the ganglia of the visceral complex, into the superior cervical and the nuchal nerves, and into the connective tissue surrounding the central nervous system. Axon tracts ramified between the muscle cells of the walls of the anterior aorta and of smaller blood vessels. Peripheral innervation by the light yellow cell system was only found in muscular tissue of the ureter papilla. The antisera to the two peptide fragments of light yellow cell peptide I not only stained the light yellow cells, but also the identified yellow cells, which have previously been shown to produce the sodium influx-stimulating neuropeptide. The latter cells were negative to the in situ hybridization probes and antisera specific to the light yellow cell system. It is therefore unlikely that the yellow cells express the light yellow cell neuropeptide gene. Nevertheless, the cells contain a neuropeptide sharing antigenic determinants with light yellow cell peptide I. Our observations support the hypothesis that light yellow cells are involved in maintaining the shape of the animal via the regulation of ion- and waterbalance processes and blood pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319435
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  • 7
    Electronic Resource
    Electronic Resource
    Immunoreactivity to the pancreatic polypeptide family in the nervous system of the adult human blood fluke, Schistosoma mansoni (1990)
    Springer
    Cell & tissue research 261 (1990), S. 573-581 
    Details
    ISSN: 1432-0878
    Keywords: Neuropeptides (pancreatic polypeptide, peptide YY, neuropeptide Y) ; Immunocytochemistry ; Confocal scanning laser microscopy ; Schistosoma mansoni (Scolecida, Trematoda)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The presence and distribution of neuropeptides belonging to the pancreatic polypeptide family have been demonstrated by an indirect immunofluorescence technique in the nervous systems of adult male and female Schistosoma mansoni. Seven antisera of differing regional specificity to pancreatic polypeptide (PP), peptide YY (PYY) and neuropeptide Y (NPY) were employed on both whole-mount and cryostat-sectioned material. Positive immunoreactivity (IR) was obtained with all antisera except an N-terminally-directed antiserum to NPY. In the CNS, immunoreactivity was restricted to cell bodies and nerve fibres in the anterior ganglia, central commissure and dorsal and ventral nerve cords of both sexes, whereas, in the PNS, positive-IR was present in the plexuses innervating the subtegumental musculature and the oral and ventral suckers. Intense immunoreactivity was observed in a plexus of nerve fibres and cell bodies in the lining of the gynaecophoric canal and in fine nerve fibres innervating the dorsal tubercles of the male. In contrast, in the female, strong immunoreactivity was evident in nerve plexuses innervating the lining of the ovovitelline duct and in the wall of the ootype, but most notably in a cluster of cells in the region of Mehlis' gland. Results suggest that molecules with C-terminal homology to the PP-family are present in S. mansoni. These peptides would appear to be important regulatory molecules in the parasite's nervous system and may play a role in the control of egg production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00313537
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  • 8
    Electronic Resource
    Electronic Resource
    Superdeformation in144Eu (1993)
    Springer
    The European physical journal 346 (1993), S. 327-328 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 23.20.Lv ; 21.10.Re ; 21.60.Ev
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A ridge has been found in a γ-γ coincidence matrix obtained from the reaction122Sn(27Al,5n)144Euat 142 MeV.The half-width of the valley is ∼59 keV,which is similar to the energy spacings in the superdeformed bands in 143Euand 142Sm.This indicates the existence of superdeformed bands in 144Eu.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292528
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  • 9
    Electronic Resource
    Electronic Resource
    Structure of the Triplet of low-lying states in101Mo (1991)
    Springer
    The European physical journal 339 (1991), S. 269-278 
    Details
    ISSN: 1434-601X
    Keywords: 27.60.+j ; 23.20.−g ; 21.60.−n
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The properties of the triplet of low-lying states in101Mo have been studied through spectroscopy of theγ radiation following thermal neutron capture in100Mo and β− decay of101Nb and through a measurement of the proton angular distributions in the100Mo(d,p) reaction with 14 MeV deuteron energy. The half-lives of the 13.5 keV state and the 57.0 keV 5/2+ state have been measured as 226(7) and 133(7)ns, respectively. These values and the quadrupole/dipole mixing ratios of the 13.5 keV and 43.5 keV transitions yield spin and parity 3/2+ for the 13.5 keV level. The E2 components in the 13.5 (3/2+ →1/2+) and 43.5 keV (5/2+→3/2+) transitions are ≦ 8·10−4 and 54(9)%, respectively. The possibility of an additional state near to the 57.0 keV level is discussed. IBFM/PTQM calculations, taking into consideration the transitional character of the100Mo boson core, account for the electromagnetic-transition and transfer-reaction pattern of the triplet of states.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01284064
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  • 10
    Electronic Resource
    Electronic Resource
    Beta-decay energy measurements using total gamma-absorption spectroscopy (1993)
    Springer
    The European physical journal 344 (1993), S. 425-429 
    Details
    ISSN: 1434-601X
    Keywords: 23.40.−s ; 27.50.+e ; 27.60.+j ; 27.70.+q ; 29.90.+r
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An application of the totalγ-absorption (TGA) spectroscopy to measurements of theβ-decay energies (Q) for nuclei far from stability is described. This approach provides theQ-values with accuracies up to 60 keV. TheQ values determined by this method at the IRIS facility for 64 nuclides in the mass region fromA=76 toA=165 are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01283198
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