Avian infectious bronchitis virus (IBV) causes tremendous economic losses to the poultry industry worldwide. Different serotypes of this virus show little cross-protection. The present study investigated the relationship between differences in the genotype based on the N-terminus of the spike protein and the protection provided by vaccination with IBVs. Cross-immunization tests were performed u...

Erklärung Ich erkläre hiermit, dass ich die vorliegende Arbeit selbstständig verfasst und keine anderen als die angegebenen Quellen und Hilfsmittel verwendet habe.

who had a major influence on my mathematical development and who always had time for me and my questions. I am especially indebted to Prof. Hilgert for his guidance. He encouraged me to spend a semester abroad and proposed the topic of this thesis to me. I am also grateful to the " Studienstiftung des deutschen Volkes " for two brilliant summer academies and the opportunity to meet a lot of gre...

Purpose – Although the role of enterprise in R&D is broadly acknowledged, few attempts have been made to gather data for analyzing the nature and scope of private sector collaboration. This study aims to deliver empirical results based on quantitative data to gain insight into the role of private enterprise as an indispensable actor in scientific development and innovation. Design/methodology/a...

Ich versichere hiermit ehrenwörtlich, dass die vorgelegte Dissertation von mir selbständig und ohne unerlaubte Hilfe angefertigt wurde. Erklärung Hiermit erkläre ich, dass ich mich nicht anderweitig einer Doktorprüfung ohne Erfolg unterzogen habe.

An alle ein großes Dankeschön. Matthias Zinram kann ich nicht genug danken! Ohne seine Unterstützung, seine Ermutigung und seine Zuversicht hätte ich es nicht geschafft.

The present investigations were aimed to evaluate the antimicrobial and antioxidant efficacies of budmunchiamine-A (BUA) of Albizia amara . The activity-guided isolation leaded to isolate the bioactive compound budmunchiamine-A from alkaloid extract of A. amara . The budmunchiamine-A showed significant broad-spectrum antimicrobial activity with zone of inhibition (ZOI), minimum inhibitory conce...

In late 2014, a H5N8 highly pathogenic avian influenza (HPAI) virus, clade 2.3.4.4, spread by migratory waterfowl into North America reassorting with low pathogenicity AI viruses to produce a H5N2 HPAI virus. Since domestic waterfowl are common backyard poultry frequently in contact with wild waterfowl, the infectivity, transmissibility, and pathogenicity of the United States H5 HPAI index viru...

An influenza A strain, Ryan, isolated in Melbourne in 1954 contains on a particle basis about 20% filaments. By using the electron microscope for particle counting, the efficiency as haemagglutinin of Ryan ‘long’ filaments (particles in which length : width > 6) was estimated to be about 6 times greater than that of spheres of PR8 virus. Allantoic fluid preparations of Ryan virus have high valu...

Erklärung Hiermit erkläre ich, dass ich die vorliegende Diplomarbeit selbstständig durchgeführt und keine anderen als die angegebenen Quellen und Hilfsmittel benutzt habe.