1. Department
of Nutritional and Physiological Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria
2. Institute
of Animal Nutrition and Functional Plant Compounds, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
3. Department
of Inorganic Chemistry, University of Vienna, 1090 Vienna, Austria
4. Department
of Zoology, University of Johannesburg, P.O. Box 524, Auckland Park, 2006 South Africa
5. Institute
of Pharmacology and Toxicology, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
6. State
Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, 530004 Nanning, Guangxi, China