Es wurde gefunden, dass Tris(pentafluorphenyl)boran die zweifache C(sp3)-H-Silylierung von mehreren Trialkylaminderivaten mit Dihydrosilanen katalysiert und entsprechenden 4-Silapiperidine in annehmbaren Ausbeuten ergibt. Die mehrstufige Reaktionsabfolge beinhaltet Dehydrierung des Amins zum Enamin an zwei Alkylresten elektrophile (eine inter- eine intramolekular) Silylierungen jener Enamine.

3 4 Thibault Viennet, Michael M. Wördehoff, Boran Uluca, Chetan Poojari, Hamed 5 Shaykhalishahi, Dieter Willbold, Birgit Strodel, Henrike Heise, Alexander K. Buell, 6 Wolfgang Hoyer, Manuel Etzkorn 7 8 Institute of Physical Biology, Heinrich-Heine-University Düsseldorf, Germany 9 Instititue of Complex Systems, Forschungszentrum Jülich, Germany 10 Department of Physics, Tampere University of Tec...

In many parts of Africa, people searching for honey are led to bees' nests by the greater honeyguide (Indicator indicator Sparrman). The Boran people of Kenya claim that they can deduce the direction and the distance to the nest as well as their own arrival at the nest from the bird's flight pattern, perching height, and calls. Analyses of the behavior of guiding birds confirmed these claims.

African bovine trypanosomiasis, caused by the protozoan parasite Trypanosoma congolense, is endemic throughout sub-Saharan Africa and is a major constraint on livestock production. A promising approach to disease control is to understand and exploit naturally evolved trypanotolerance. We describe the first attempt to investigate the transcriptional response of susceptible Boran (Bos indicus) ca...

The pharmacokinetics of diminazene in five female Boran (Bos indicus) cattle before and then during acute and chronic phases of experimental infections with Trypanosoma congolense were investigated. A 7.0% (wt/vol) solution of diminazene aceturate (Berenil) was used in all three phases of the study and administered as a single intramuscular dose of 3.5 mg of diminazene base per kg of body weigh...

Theileria parva-naïve Friesian (Bos taurus), Boran (Bos indicus) and Maasai Zebu steers (B. indicus) were infected with a T. parva sporozoite stabilate dose which had previously been shown to induce an estimated 50% mortality rate in Boran cattle. All the cattle developed patent infections with no significant differences in the length of the prepatent period to development of macroschizonts (P ...

The objective of this study was to characterize breeds representing diverse biological types for birth and weaning traits in crossbred cattle. Gestation length, calving difficulty, percentage of unassisted calving, percentage of perinatal survival, percentage of survival from birth to weaning, birth weight, BW at 200 d, and ADG were measured in 2,500 calves born and 2,395 calves weaned. Calves ...

During the last few years, more and more researchers have been applying IFSs to multi-attribute decision making under various different situations, and a lot of work has been done (Chen and Tan 1994; Hong and Choi 2000; Xu and Yager 2006; Boran et al. 2009; Xu 2010a, c; Zhao 2009; Zhao et al. 2010; Tan and Chen 2010; Wei 2010a; Xu and Xia 2012a; Xu and Cai 2010; Wu and Chen 2011, etc.). The con...