Publications 2003

Benkendorff, K.; Liebert, F., 2003: The Effect of Substituting Fish Meal on Threonine Requirement in Diets for Nile Tilapia (Oreochromis Niloticus) Derived by an N-Utilization-Model. Deutscher Tropentag October 8-10, 2003: Technological and Institutional Innovations for Sustainable Rural Development. Book of Abstract 2003, 261.

Benkendorff, K.; Portz, L; Liebert, F., 2003: Influence of level of N-deposition on determination of lysine efficiency in diets for Nile Tilapia (Oreochromis niloticus). Proc. Soc. Nutr. Physiol. 12, 91.

Benkendorff, K; Liebert, F.; Portz, L., 2003: Model calculation for lysine requirement of OREOCHROMIS NILOTICUS corresponding to growth capacity and efficiency of lysine. Proc. Congr. World Aquaculture Society, Salvador, Brazil 2003, 94.

Chaudry, M. A.; Badshah, A.; Bibi, N.; Zeb, A.; Ahmed, S. A.; ter Meulen, U., 2003: Citrus waste utilization in poultry rations. Arch. Geflügelk. 67 (6), 1 - 5.

Gaye-Siessegger, J.; Focken, U.; Abel, H.-J.; Becker, K., 2003: Feeding level and diet quality influence trophic shift of C N isotopes in Nile tilapia (oreochromis niloticus (L.)). Isotopes Environ. Health Stud. 39 (2), 125-134.

Htoo, J. K. K., 2003: Phosphorus and nutrient utilization of growing chickens and laying hens fed corn-soybean and wheat soybean based diets supplemented with microbial phytase. Diss. sc. agr. Göttingen, 163 Seiten. ISBN 3-89873-862-0

Htoo, J. K.; Liebert, F., 2003: Phytate degradation in different parts of the gut depending on native phytase activity and phytase supplementations in broiler diets. Proc. Soc. Nutr. Physiol. 12, 37.

Htoo, J. K.; Liebert; F., 2003: Einfluss mikrobieller Phytase in Mais-Soja Diäten für Legehennen auf Leistung sowie Energie- und Nährstoffverwertung. In: 9. Symposium Vitamine und Zusatzstoffe in der Ernährung von Mensch und Tier, Jena/Thüringen, Abstracts.

Lee, C. W.; Liebert, F., 2003: Effects of dietary protein and threonine supply on in vitro liver threonine dehydrogenase activity and threonine efficiency in rat and chicken. J. Anim. Physiol. a. Anim. Nutr. (submitted 2003).

Liebert, F.; Lee, C. W., 2003: Influence of protein and threonine level on liver threonine dehydrogenase activity and efficiency of threonine utilization in diets for laboratory rat and growing chicken. EAAP-publ. No. 109, Wageningen Academic Publ., 2003, 705 - 708.

Liebert, F.; Mohamed, K., 2003: Estimation of growth capacity in nile tilapia genotypes and further conclusions for determination of amino acid requirements based on an exponential N-utilization model. Proc. Congr. World Aquaculture Society, Salvador, Brazil 2003, 417.

Liebert, F.; Portz, L., 2003: Nutrient utilization of Nile Tilapia Oreochromis niloticus fed plant based low phosphorus diets supplemented with graded levels of different sources of microbial phytase. Proc. Congr. World Aquaculture Society, Salvador, Brazil 2003, 43.

Liebert, F.; Portz, L., 2003: Phytate degradation in the gut of Nile Tilapia Oreochromis bukitucys fed plant based low phosphorus diets with different sources of microbial phytase. Poster Congr. World Aquaculture Society, Salvador, Brazil 2003, P44, 157.

Nurhayati, 2003: Study on the potential distribution, accumulation and metabolite products of chlorocholine chloride (CCC) in tissues of laying hens receiving diets with varying levels of 15N-CCC. Diss. sc. agr., Göttingen, 129 Seiten. ISBN 3-89873-783-7.

Portz, L.; Liebert, F., 2003: Effects of dietary phytase activity on inorganic phosphorus concentration in blood, scale and vertebral of Nile Tilapia Oreochromis niloticus fed low phosphorus plant based diets. Poster Congr. World Aquaculture Society, Salvador, Brazil 2003, P 39, 152.

Portz, L.; Liebert, F., 2003: Comparison of three different external markers in digestibility study of nutrient and minerals involving the Nile Tilapia Oreochromis niloticus. Poster Congr. World Aquaculture Society, Salvador, Brazil 2003, P 47, 160.

Portz, L.; Liebert; F., 2003: Wirkung verschiedener mikrobieller Phytasen in pflanzlichen Diäten von Tilapien (Oreochromis niloticus). In: 9. Symposium Vitamine und Zusatzstoffe in der Ernährung von Mensch und Tier, Jena/Thüringen, Abstracts.

Portz, L.; Liebert, F., 2004 (accepted 2003): Growth, nutrient utilization and parameters of mineral metabolism in Nile tilapia Oreochromis niloticus (Linnaeus, 1758) fed plant based diets with graded levels of microbial phytase. J. Anim. Physiol. a. Anim. Nutr. 88 (9-10), 311-320.

Portz, L.; Benkendorff, K.; Liebert, F., 2003: Effects of phytase supplementation on parameters of growth, digestibility and nutrient utilization of Nile Tilapia. Proc. Soc. Nutr. Physiol. 12, 80.

Portz, L.; Benkendorff, K.; Liebert, F., 2003: Growth and mineral absorption of Nile Tilapia (Oreochromis niloticus) fed a plant based diet supplemented with microbial phytase. Proc. Congr. World Aquaculture Society, Salvador, Brazil 2003, 592.

Sukria, H. A.; Liebert, F.; Htoo, J. K.; Schlemmer, U.; Jany, K.-D., 2003: Phosphorus utilization and activity of phytate degrading enzymes in the digesta of different parts of the digestive tract of chicken. Proc. Soc. Nutr. Physiol. 12, 30.

Sukria, Heri Ahmad, 2003: Studies on the efficiency of microbial phytase and nutrient utilization of chicken diets with thermal processing of feed components. Diss. sc. agr. Göttingen, 114 Seiten. ISBN 3-89873-838-8.

Sünder, Angela; Liebert, F., 2003: Feed-related transfer of polycyclic aromatic hydrocarbons (PAH's) into various tissues of broiler chicken. Proc. Soc. Nutr. Physiol. 12, 113.

Thong, H. T.; Liebert, F., 2003: Variability of lysine efficiency in different batches of peas (Pisum sativum) on efficiency of lysine of growing pigs. Proc. Soc. Nutr. Physiol. 12, 88.

Thong, H. T.; Liebert, F., 2003: Effect of hydrothermal processing of soybean flakes and peas (Pisum sativum) on efficiency of lysine for growing pigs. Proc. Soc. Nutr. Physiol. 12, 89.

Thong, H. T., 2003: Variability of Lysine and Threonine Efficiency in Feed Proteins and Implications on Amino Acid Requirements of Growing Pigs of Modern Genotype. Diss. sc. agr. Göttingen, 183 Seiten. ISBN 3-89873-659-8.

Thong, H. T.; Liebert, F., 2004 (accepted 2003): Potential for protein deposition and threonine requirement of modern genotype barrows fed graded levels of protein with threonine as the limiting amino acid. J. Anim. Physiol. a. Anim. Nutr. 88, 196 - 203.

Thong, H. T.; Liebert, F., 2004 (accepted 2003): Amino acid requirement of growing pigs depending on efficiency of amino acid utilization and level of protein deposition. 1st Communication: Lysine. Arch. Anim. Nutr. 58, 69 - 87.

Thong, H. T.; Liebert, F., 2004 (accepted 2003): Amino acid requirement of growing pigs depending on efficiency of amino acid utilization and level of protein deposition. 2nd Communication: Threonine. Arch. Anim. Nutr. 58(2), 157 - 168.

Wesseling, B., 2003: Zur Wirksamkeit von Futteraminosäuren beim Schwein. Diss. sc. agr. Göttingen, 159 Seiten. ISBN 3-86537-002-0.