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  • 1980-1984  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 16 (1981), S. 221-225 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of radiation on the physical properties of styrene-acylonitrile co-polymer impregnated concrete was examined and compared with that of polymethyl methacrylate impregnated concrete. Monomer conversion, compressive and tensile strengths, molecular weight and water absorption were determined with changes in polymer loading. The impact strength and the acid resistance of styrene-acrylonitrile co-polymer impregnated specimens were also determined. Polymer loading was increased using vacuum and pressure impregnation techniques.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 15 (1983), S. 139-143 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Sont présentés les résultats d'une vaste enquête sérologique sur la brucellose portant sur 14000 échantillons de sérum prélevés sur des animaux domestiques et du bétail importé pendante une période de 5 ans. La méthode standard d'agglutination sur lame a été utilisée. L'incidence de la brucellose était la plus élevée (11,6 p. 100) chez les petits ruminants des Centres d'Elevage intensif. Ensuite venaient les animaux importés (2,6 p. 100) sacrifiés pendant la période du Hajj 1977. Enfin, on a trouvé une incidence quelque peu plus faible chez le bétail local (1,5 p. 100) sacrifié la même période du Hajj. L'incidence était très faible parmi les groupes suivants de bétail: petits ruminants élevés sur des parcours désertiques (0,5 p. 100), petits ruminants élevés en petit groupe autour de maisons individuelles (0,4 p. 100) et dans les troupeaux laitiers industriels (0,2 p. 100).
    Abstract: Resumen Se describen los resultados de un extenso estudio sobre brucelosis, utilizando la prueba de aglutinación en placa, en 14,000 muestras de suero proveniente de animales nativos e importados, estudio que duró cinco años. La prevalencia de brucelosis fue alta (11.6%) en pequeños rumiantes criados intensivamente, menor (2.6%) en animales importados sacrificados durante la estación Hajj de 1.977 y baja (1.5%) en animales locales sacrificados durante la misma estación. La prevalencia fué muy baja en los siguientes grupos de ganado: pequeños rumiantes criados en el desierto (0.5%), pequenos rumiantes criados cerca de las casas de habitación (0.4%) y en hatos lecheros comerciales (0.2%).
    Notes: Summary The results of an extensive serological survey for brucellosis antibodies using the standard plate agglutination procedure on 14,000 serum samples from native domestic animals and imported livestock over a five year period are reported. The incidence of brucellosis was highest (11.6%) in small ruminants reared intensively in breeding establishments, next highest (2.6%) in imported animals sacrificed during the Hajj season of 1977 and somewhat lower (1.5%) in local livestock sacrificed during the same Hajj season. The incidence was very low among the following groups of livestock: small ruminants raised on desert ranges (0.5%), small ruminants raised in small groups around individual homes (0.4%) and in commercial dairy herds (0.2%).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 16 (1984), S. 213-218 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Un programme pratique de lutte contre la brucellose ovine dans un troupeau de moutons Najdi à Haradh et de protection des éleveurs contre l'infection a été mis en oeuvre. Les moutons de Haradh ont été testés sérologiquement trois fois à six mois d'intervalle. Sur 2 721 moutons soumis au premier test, 387 (14,2 p. 100) ont réagi positivement; sur 2 072 moutons, au second test, 31 (1,5 p. 100); et sur 2 963 moutons, au troisième test, seulement 0,3 p. 100. Sur huit éleveurs de moutons, six étaient atteints de fièvre de Malte. Les moutons ayant réagi positivement ont été abattus et enterrés après chaque test. Après le troisième test, tous les animaux négatifs ont été vaccinés avec un vaccin àBrucella melitensis inactivé. Les éleveurs ont été soignés la clinique de Haradh. Un an après la fin du programme, les avortements et les problèmes d'infertilité avaient disparu et le pourcentage d'agnelages avait augmenté de 0,8 à 1,3 agneau par brebis. De plus, tous les jeunes agneaux nés de mères vaccinées étaient sérologiquement négatifs. L'extension de ce programme en une campagne de lutte nationale est préconisée.
    Abstract: Resumen Se implementó un programa práctico, para el control de brucelosis ovina en ovejas Najdi en Haradh, y para proteger a los pastores. Las ovejas se analizaron serológicamente tres veces con intervalos de seis meses. De 2.721 ovejas analizadas la primera vez, 387 (14.2%) dieron resultados positivos. La segunda vez, se analizaron los sueros de 2.072 ovejas, de las cuales 31 (1.5%) fueron positivas. El tercer analisis se realizo en 2.963 ovejas de la cuales solo nueve (0.3%) se detectaron como reactores positivos. De ocho pastores, seis tenían fiebre de Malta. Las ovejas positivas fueron eliminadas después de cada prueba serológica. Seguidamente, después de la tercera prueba, todas las ovejas negativas se vacunaron con la vacuna inactivada deBrucella melitensis. Los pastores enfermos, fueron hospitalizados. Un año después de la campaña, los problemas de aborto e infertilidad habían desaparecido, y el porcentaje de nacimientos se incrementó de 0.8 a 1.3 corderos por oveja. Más aún, todos los corderos nacidos de madres vacunadas fueron negativos serológicamente. Nosotros sugerimos la expansión del presente programa de control de brucelosis, a todo el Reino.
    Notes: Summary A practical programme for control of ovine brucellosis in a Najdi sheep flock at Haradh and protection of sheep handlers from infection was implemented. Haradh sheep were serologically tested three times at six-month intervals. Of 2,721 sheep subjected to the first test, 387 (14.2%) were positive reactors. At the second test 2,072 sheep were tested and 31 (1.5%) were positive. The third test was performed on 2,963 sheep and only nine (0.3%) positive reactors were found. Of eight sheep handlers six had Malta fever. Positive reactor sheep were slaughtered and buried after each test. Following the third test all negative sheep were vaccinated with inactivatedBrucella melitensis vaccine. Infected sheep handlers were treated at the Haradh clinic. One year after completion of the programme abortions and infertility problems had disappeared and the lambing percentage had increased from 0.8 to 1.3 lambs per ewe. In addition all young lambs born to vaccinated ewes were found to be serologically negative. We suggest expansion of the present programme into a national brucellosis control campaign in the kingdom.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 25 (1980), S. 821-828 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Some 2,4′-substituted poly(arylene ether sulfones) have been prepared and their properties compared with those of the conventional 4,4′ homopolymer. The introduction of the comonomer leads to a small increase in yield stress and to a greater tendency to brittle fracture, which can be demonstrated from fracture surface micrographs.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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