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  • 1
    Electronic Resource
    Electronic Resource
    Calcitonin Gene—Related Peptide as Modulator of Cholecystokinin-Induced Contraction of Guinea Pig Gall Bladder Strips in Vitro (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 657 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb22828.x
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  • 2
    Electronic Resource
    Electronic Resource
    Longitudinal electron diffusion coefficients in gases: Noble gases (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 5363-5371 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Values of the ratio of the longitudinal diffusion coefficient to mobility DL/μ for electrons in He, Ar, Kr, and Xe are derived from current waveforms obtained during earlier measurements of electron mobility. The electric field to gas density ratios E/N cover the wide range of 10−3 to 20 Td, thereby bridging previous experiments at low E/N to recent experiments at high E/N. Here 1 Td=1×10−21 V m2. The corresponding DL/μ values range from 0.0066 eV for thermal electrons at 77 K to 10 eV. In addition to the well-known peak in DL/μ for Ar at E/N between 0.01 and 0.1 Td caused by the Ramsauer minimum in the momentum transfer cross section, we find previously unreported low-energy peaks in DL/μ vs E/N in Kr and Xe and previously unreported pronounced leveling-off in DL/μ at E/N(approximately-greater-than)8 Td in Ar, Kr, and Xe. Calculations of transport coefficients using numerical solutions of the Boltzmann equation and cross section sets in the literature give good agreement with experiment from E/N producing thermal electrons up to average energies ≈10 eV and E/N up to 100 Td, the upper limit of our calculations. The leveling off of DL/μ at high E/N is caused by inelastic collisions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350555
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  • 3
    Electronic Resource
    Electronic Resource
    Measurements of swarm parameters and derived electron collision cross sections in methane (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 3311-3323 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A pulsed drift tube has been used to measure the electron drift velocity in methane over the range of E/N from 10 to 1000 Td. In addition, measurements of the positive ion mobility and ionization coefficient have been made over the range of E/N from 80 to 1000 Td. Within the experimental sensitivity, no evidence of attachment has been observed in this range. A set of electron collision cross sections has been assembled and used in Monte Carlo simulations to predict values of swarm parameters. The cross-section set includes a momentum transfer cross section which is based primarily on the present and previous drift velocity measurements, cross sections for vibrational excitation and ionization based on published experimental cross-section measurements, and a cross section for dissociation into neutral products obtained by subtracting a measured dissociative ionization cross section from a measured total dissociation cross section. Isotropic scattering is assumed for all types of collisions in the Monte Carlo simulations. Good agreement between the predicted and measured values of swarm parameters is obtained without making any adjustments to these cross sections. A two-term Boltzmann equation method has also been used to predict swarm parameters using the same cross sections as input. The two-term results are in poor agreement with experiment and confirm the well-known inadequacy of two-term methods in the case of methane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342642
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  • 4
    Electronic Resource
    Electronic Resource
    Monte Carlo study of ionization zone electron kinetics in negative pin-plane coronas in atmospheric air (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 3715-3719 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Monte Carlo simulation techniques are used to study the electron transport properties in the high electric field region near the pin in negative pin-plane corona discharges in atmospheric air. The results of the calculations show that the discharge electrons are nearly in equilibrium with the high local electric field near the pin tip. Consequently, a simpler computational model can be used to predict the voltage-current characteristics of these discharges. The results also show that ionization growth is very rapid for the pin-tip radii, gap lengths, and applied voltages which have been studied experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335635
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  • 5
    Electronic Resource
    Electronic Resource
    The tooth replacement phenomenon and growth in the green iguana,Iguana iguana (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 595-596 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A long term study of the relationship between growth and the increase in tooth width and number of teeth was conducted. The results indicate that the tooth replacement phenomenon provides a mechanism for increasing tooth size in relation to increasing body size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01971114
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  • 6
    Electronic Resource
    Electronic Resource
    Rhythmic activity in frog (Rana pipiens) visual system (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 1040-1041 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Nachweis, dass die Netzhaut-Ganglienzellen dritter Klasse beiRana pipiens auf Beleuchtungsperiodenausgleich reaktiv rhythmische potentialfolgen von ≪bursts≫ und ≪firing≫ erzeugen. Als wirksamste Beleuchtungsperioden erwiesen sich solche im mesopischen Bereich bei Mindestdauer von 15 sec. Weder skotopische noch photopische Belichtungen führten zu rhythmischer Aktivität.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01938997
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of calcitonin on calcium uptake in mouse molars in vitro (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 480-481 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Mouse maxillary second molars were removed at either 24 or 96 h of age and maintained in vitro. Half of the teeth, of each age group, were treated with 50 m-units of synthetic salmon calcitonin. By comparing the initial and final calcium concentrations in the medium, the net uptake or release of calcium was inferred. The treated molars took up significantly more calcium than the untreated groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01986147
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  • 8
    Electronic Resource
    Electronic Resource
    Untersuchung von Essig (1937)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 109 (1937), S. 64-66 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01370748
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  • 9
    Electronic Resource
    Electronic Resource
    Aceton (1932)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 89 (1932), S. 367-371 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01555134
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  • 10
    Electronic Resource
    Electronic Resource
    Tooth replacement and growth in the young green iguana, Iguana iguana (1985)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 186 (1985), S. 265-269 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A study using eight rapidly growing young green iguanas (Iguana iguana; initial mean weight 68.0 ± 3.8 gm) examined the changes in the wave replacement of teeth, the increased size of the teeth, and the posterior migration of tooth positions over a period of 16 weeks. The teeth increase in width as the lizards grow. The tooth positions shifted posteriorly, providing adequate space for the larger replacement teeth. These observations suggest that the wave replacement of teeth allows for growth of the dentition in length and height adequate to maintain tooth size in proportion to the overall size of the individual.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051860303
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