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  • 1
    Digitale Medien
    Digitale Medien
    Mixture distributions fitted to instrument counts (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 1347-1352 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A technique for fitting mixture distributions to discrete and continuous instrument count data is presented. The use of the EM algorithm for performing maximum likelihood estimation is introduced and advantages over other methods are discussed. Equations are presented for fitting mixtures of Poisson distributions and mixtures of normal distributions. Examples of the fitting of these two types of mixture distribution are given, and it is shown how standard errors of the parameter estimates can be obtained from within the framework of the fitting process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1142497
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  • 2
    Digitale Medien
    Digitale Medien
    Why Doctors Join the British Medical Association (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Social policy and administration 7 (1973), S. 0 
    Details
    ISSN: 1467-9515
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Politikwissenschaft , Sociologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1467-9515.1973.tb00043.x
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  • 3
    Digitale Medien
    Digitale Medien
    Comparison of responses to floret and seedling inoculation in wheat- Ustilago tritici and barley- U. nuda combinations (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 40 (1991), S. 0 
    Details
    ISSN: 1365-3059
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: The floret and seedling methods for inoculating wheat and barley with Ustilago tritici and U. nuda, respectively, were optimized and then compared. Floret inoculation gave higher infection levels than did seedling inoculation, especially for wheat, but problems of plant mortality and standardization of tissue age were greater with the former method. Floret inoculation identified wheat and barley varieties exhibiting embryo resistance (class 1 or 2 resistance) or seedling resistance (class 3), but only class 3 wheat and barley varieties (and one class 2 wheat variety) were resistant to seedling inoculation. Using near-isogenic wheat lines expressing different levels of partial resistance to floret inoculation, positive correlations were obtained between percentage infection levels resulting from the two inoculation protocols. In addition, race-specific host-pathogen interactions such as hypersensitivity and partial smutting were expressed following both floret and seedling inoculation, indicating that these interactions operate in the developing plant. The potential value of the seedling inoculation method in fundamental and applied research into the cereal-loose smut interaction is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-3059.1991.tb02376.x
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  • 4
    Digitale Medien
    Digitale Medien
    Virulent and fungicide-tolerant races of loose smut (Ustilago nuda and U. tritici) in Ireland (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 40 (1991), S. 0 
    Details
    ISSN: 1365-3059
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Following the severe outbreaks of loose smut in the early 1980s, a survey was carried out over the period l984-86of the Ustilago nuda and U. tritici populations in the Republic of Ireland. U. tritici was very rare, only one infected wheat plant being reported in the 3 years of the survey. This fungus was represented by a virulent race distinct from those identified in Britain in the 1950s. U. nuda was widespread, and two races were identified in 1984. A virulent race, capable of overcoming the recessive resistance gene present in differential variety Missouri Early Beardless, was isolated from a single crop grown from imported seed. Several crops grown from seed treated with Vitavax (active ingredient carboxin), which had been imported from France, contained a carboxin-tolerant race of U. nuda. Subsequent surveys in 1985 and 1986 failed to recover these U. nuda races. The role of imported infected seed in the introduction of new races of the loose smut fungi is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-3059.1991.tb02413.x
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  • 5
    Digitale Medien
    Digitale Medien
    Environmental contamination during tracheal suction (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 46 (1991), S. 0 
    Details
    ISSN: 1365-2044
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The extent of airborne environmental bacterial contamination which occurs following tracheal suction has been investigated in patients undergoing intermittent positive pressure ventilation in the intensive therapy unit. Two methods of performing suction, one using a conventional open technique and one using a closed system (Stericath), have been compared. Significantly lower levels of environmental contamination were observed when the closed system was used.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2044.1991.tb09858.x
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  • 6
    Digitale Medien
    Digitale Medien
    The quantitative analysis of Sb, Ag, Zn, Co and Fe in human dental calculus by neutron activation analysis and high-resolution gamma spectrometry (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 8 (1973), S. 0 
    Details
    ISSN: 1600-0765
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: The sample to be analysed, and a standard of known composition, were irradiated simultaneously in the poolside facility of a nuclear reactor for 130 hours in a thermal neutron flux of approximately 2×1013 n.cm−2. sec−1, and the induced radioactivity compared after a cooling period of four weeks. The investigation was done with a high resolution Ge(Li) detector coupled to a fully transistorized 4000 channel analyser. The concentration of five elements, namely Sb, Ag, Zn, Co and Fe, was determined in human dental calculus by instrumental activation analysis and found to be 0,68 ppm, 0,18 ppm, 174 ppm, 0,08 ppm and 54 ppm respectively.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0765.1973.tb00766.x
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  • 7
    Digitale Medien
    Digitale Medien
    Pulpal response to a new composite dental restorative material (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 2 (1973), S. 0 
    Details
    ISSN: 1600-0714
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Abstract. A new composite restorative material, Enamelite, has recently been introduced for the conservative treatment of cervical erosion and hypoplastic enamel surfaces. The pulpal response elided by the restorative material was investigated in teeth of the vervet monkey and compared to a modified zinc oxide-eugenol cement.Buccal or labial Class V cavities were prepared in 128 teeth in six vervet monkeys. The teeth in contralateral segments were restored with the restorative and control materials, respectively. The experimental animals were killed at 4, 14 and 42 days.The restorative and control materials exhibited about the same minimal degree of cellular displacement and inflammatory response at each of the three postoperative time intervals.The percentage of specimens with reparative dentin increased progressively with time. At all three intervals the restorative material elicited a greater response than the control zinc oxide-eugenol cement.The results suggest that the clinical application of the restorative material on cervical eroded or hypoplastic enamel surfaces without a protective lining is a safe procedure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0714.1973.tb01684.x
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  • 8
    Digitale Medien
    Digitale Medien
    A comparative study of the surface of keratinized and non-keratinized oral epithelia (1973)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 8 (1973), S. 0 
    Details
    ISSN: 1600-0765
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Portions of clinically healthy epithelium from the hard and soft palates, free and attached gingivae, cheek, floor of mouth and lip from the vervet monkey (Cercopithecus aethiops) were examined with the light and with the scanning electron microscope.The epithelia can be subdivided histolocally into keratinized and non-keratinized types. Each of these has a definite surface appearance irrespective of the region from which they are derived. Non-keratinized epithelia show a corrugated surface formed by microplications while keratinized epithelia have a cratered or pitted appearance. In addition, the parakeratinized free gingival surface may be masked by the presence of pellicle. The reason for the different surface appearances is obscure but may be related to different intercellular interdigitations in the two types of epithelia.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1600-0765.1973.tb00770.x
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  • 9
    facet.materialart.
    Unbekannt
    OBSERVER ERROR IN SKINFOLD THICKNESS MEASUREMENTS (1973)
    Baltimore : Periodicals Archive Online (PAO)
    Human Biology. 45:2 (1973:May) 273 
    Details
    ISSN: 0018-7143
    Thema: Biologie
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5243-1973-045-02-000010
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  • 10
    Digitale Medien
    Digitale Medien
    Omeprazole and Helicobacter Pylori: temporary suppression rather than true eradication (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Alimentary pharmacology & therapeutics 5 (1991), S. 0 
    Details
    ISSN: 1365-2036
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Twenty-four Helicobacter pylori (H. pylori)-positive patients were treated for 28 days with either 20 mg omeprazole o.m. (n= 12) or 40 mg omeprazole o.m. (n= 12). Clearance (absence of H. pylori at the end of or shortly after treatment) and eradication (absence of H. pylori 1 month after cessation of treatment) were assessed using the 14C-urea breath test. Observed clearance and eradication were: 20 mg omeprazole 3/12 and 0/12; 40 mg omeprazole 6/12 and 1/12 respectively. The effect on H. pylori is probably due to the change in gastric pH from acid to neutral, however it is insufficient to recommend the inclusion of omeprazole in regimens aimed at eradicating H. pylori.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2036.1991.tb00032.x
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