Bernd S. W. Schröder

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Endogenous P(i) recycling is a characteristic feature of the P homeostasis in ruminants. A pronounced salivary P(i) secretion into the rumen is balanced by a high intestinal P(i) absorption and an almost complete renal P(i) reabsorption. In monogastric animals, the major P(i) transport mechanism across the apical membrane of the enterocyte is an(More)
Experimental data on the effects of Saccharomyces boulardii on rumen microbial metabolism are scarce. The aim of this study was to examine whether S. boulardii had an effect on parameters of rumen microbial metabolism at different dosages and whether the yeast would be suitable as a probiotic agent for ruminants. To test whether the potential positive(More)
In order to study the localization and mechanisms of intestinal phosphate transport in sheep and goats, unidirectional inorganic phosphate (Pi) flux rates across isolated stripped epithelial tissues were measured in vitro by applying the Ussing-chamber technique. In the first experiment the tissues were obtained from animals which had been kept on an(More)
Adequate blood calcium (Ca) concentrations are a prerequisite to maintain several physiological functions of mammals such as pig and ruminants. Thus, blood Ca levels have to be regulated within very close limits. This is basically ensured through the coordinated effects of the calcitropic hormones parathyroid hormone (PTH) and calcitriol(More)
This study concerns the uptake of inorganic phosphate into brush-border membrane vesicles prepared from jejunal tissues of either control or Ca-and/or P-depleted goats. The brush-border membrane vesicles showed a time-dependent accumulation of inorganic phosphate with a typical overshoot phenomenon in the presence of an inwardly directed Na+ gradient. The(More)
conjecture was finally proved shortly after the publication of this book[1]. Packing and covering properties of various clutters including two–commodity flows, r–cuts and r–arborescences, T–cuts and T–joins, and odd cycles are the subject of chapters one through five of the book. In chapters six and seven, the approach is extended to balanced and totally(More)
Functional studies indicate marked differences in the extent and site of gastrointestinal calcium absorption between monogastric and ruminant species. Given that the epithelial calcium channel TRPV6 has a pivotal role in active intestinal calcium transport, this study investigated TRPV6 expression in ovine duodenal, jejunal, ruminal and renal epithelial(More)
The ex vivo expansion of hematopoietic progenitor cells is of great interest for a variety of clinical applications, e.g. bone marrow transplantation or gene therapy. Therefore it is of general interest to develop a culture system, able to mimic the in vivo hematopoesis, which is a prerequisite for long-term hematopoietic culture. Our approach was to modify(More)
Feeding experiments were carried out in growing pigs using topinambur powder or inactivated yeasts as prebiotic additives with an application period of at least 3 weeks. At the end of the experimental periods the animals were killed and segments of the intestinal tract were used for measuring transport physiological parameters and for mucin histochemistry.(More)