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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Tropical animal health and production 27 (1995), S. 167-170 
    ISSN: 1573-7438
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Sur un total de 22 élevages de poulets de chair, 347 prélèvements de sérum ont été testés en inhibition de l'hémagglutination (HI). 114 (32,9 p. 100) ont présenté des anticorps du syndrome “Egg drop 1976” (EDS'76). Les titres HI de ces sérums variaient de 2 à 9 log2, le titre moyen général (moyenne géométrique) était de 3,9 log2. Parmi ces prélèvements, 82,5 p. 100 ont révélé des titres compris entre 22 et 25, le titre le plus fréquent étant 23. Tour les élevages étaient positifs et la prévalence par troupeau des anticorps HI, ainsi que leurs titres, ont également été enregistrés. Les auteurs discutent de la très large prévalence de l'infection virale EDS'76 chez les poulets de chair et de sa probable signification.
    Abstract: Resumen Se analizaron 347 muestras de suero de un total de 22 grupos de pollos broiler (pollos de engorde) mediante la prueba de hemaglutinación-inhibición (HI), y 114 (32·9%) presentaron anticuerpos frente al “síndrome de la disminución de la puesta 1976”. El rango de los titulos de HI de los sueros fue de 2 a 9 log2, siendo la media geométrica total de 3 a 9 log2. Un 82·5% de todas las muestras de suero presentaron titulos de HI entre 22 y 25, siendo el título mas frecuente 23. Todos los grupos fueron positivos y la prevalencia de grupo de anticuerpos de HI tuvo un rango de 13·3 a 46%. También se estudió la distribución por edades de anticuerpos de HI y sus titulos. Se discute la alta prevalencia de la infección por el virus del ‘síndrome de la disminución de la puesta 1976’ en broilers, así como su posible significado.
    Notes: Summary From a total of 22 broiler flocks 347 serum samples were screened by the haemagglutination inhibition (HI) test and 114 (32·9%) were positive for antibodies to egg drop syndrome 1976 (EDS'76). The HI titres of the serum samples ranged from 2 to 9 log2 and the overall geometric mean titre was 3·9 log2. Of the serum samples 82·5% showed HI titres between 22 to 25 and the most frequent titre was 23. All the flocks were positive and the flock prevalence of HI antibodies ranged from 13·3 to 46·6 per cent. The age distribution of HI antibodies and their titres have also been recorded. The widespread prevalence of EDS'76 virus infection in broilers and its likely significance are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 35 (1995), S. 77-82 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A dropped-weight test apparatus has been developed that can be used to perform low-speed impact tests on composite aircraft structures. This vertical drop-weight test apparatus is simple, compact, inexpensive and has precision impact and self-arresting design features similar to the more sophisticated, expensive test machines. The test apparatus has been used to perform low-speed impact response studies on laminated composite plates to understand the influence of impactor and target parameters on structural response and to develop a validated analysis method. Some of the experimental results generated by using this test apparatus for composite laminated plates are presented in the present paper and compared with the corresponding analytical results.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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