The primary goal in aquaculture is to maximize the growth and survival of farmed fishes at a minimal cost, which requires an understanding changes metabolism undergone by different fish breeds during development. In particular, highly intensive production systems, such as recirculating require better oxygen consumption. Ontogenetic phase shifts (i.e., sudden changes) have been observed several ...

In order to determine the most effective hormones on the in vitro oocyte maturation (germinal vesicle breakdown GVBD) in a hybrid sturgeon bester, ovarian follicles were incubated at the migratory nucleus stage in the presence of several steroids, gonadotropin preparations and forskolin. Occurrence of GVBD and 17,20β-dihydroxy-4-pregnen-3 -one (DHP) production were followed during an experiment...

Genome instability occurs early in the development of most cancers. Bester et al. now provide evidence that oncogenic signals trigger cell division without coordinate nucleotide synthesis, engendering aberrant DNA replication and damage that could promote carcinogenesis. A mismatch between proliferation and metabolite production may characterize oncogenic cell cycles.

This note presents a simple model of competitive screening in a credit market with adverse selection, where firms use interest and collateral as instruments for screening borrowers’ risk type. While the basic ideas appear in Bester (1985,1987), this version of the model is far more useful pedagogically, also (arguably) when compared with models that are more conventionally employed for this pur...

M.N. Bester, J.P. Bloomer, R.J. van Aarde, B.H. Erasmus, P.J.J. van Rensburg, J.D. Skinner, P.G. Howell & T.W. Naude Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, 0002 South Africa Department of Infectious Diseases, Faculty of Veterinary Sciences, University of Pretoria, Onderstepoort, 0110 South Africa Department of Pharmacology and Toxicolo...

2009;22(1) S Afr J Clin Nutr a Hattingh Z, PhD a Walsh C, PhD b Veldman FJ, PhD c Bester CJ, BScHons a Department of Nutrition and Dietetics, University of the Free State, b Fibrinogen Unit, Central University of Technology, Free State, c Department of Biostatistics, University of the Free State Correspondence to: Zorada Hattingh, e-mail: [email protected]

  In this study Amplified Fragment Length Polymorphism (AFLP) was applied to species identification of bester hybrids. Hybrids identification was performed by comparison of electrophoresis profiles with parental species. The simultaneous occurrence of diagnostic bands fixed in the parental species, genetic distance and identification and cluster analyses (UPGMA) allow a correct identification. ...