Aggregation of blood platelets in static magnetic fields
作者:M. Iwasaka、M. Takeuchi、S. Ueno
DOI:10.1109/20.908952
日期:——
We investigated the effects of intense magnetic fields on the blood platelet aggregation process with and without static magnetic fields of up to 14 T. A rabbit plasma and collagen mixture was used as the model system for a wounded blood vessel. Platelet aggregation was activated by the stimulation of acid soluble collagen. The platelet aggregates in strong magnetic fields were larger than the aggregates in an ambient field. An optical transmission of blood plasma during platelet aggregation also indicated that strong magnetic fields enhanced blood platelet aggregation in plasma.
Limpricht, Justus Liebigs Annalen der Chemie, 1891, vol. 263, p. 234
作者:Limpricht
DOI:——
日期:——
Particle retention in the forestomach of a browsing ruminant, the roe deerCapreolus capreolus
作者:Marcus Clauss、Matthias Lechner-Doll、Anke Behrend、Karin Lason、Denise Lang、Wolf J. Streich
DOI:10.1007/bf03192422
日期:2001.3
A combination of a flotation/sedimentation experiment and sieve analysis for the reticulorumen (RR) contents of roe deer Capreolus capreolus Linnaeus, 1758, a browsing ruminant, showed that there was no correlation between particle size and particle density. Large particles were present in both the sedimented and the buoyant fraction, which is in accord with the reported absence of stratification of RR contents in browsing ruminants. Comparative sieve analysis of roe deer RR and caecal/rectal material demonstrated that there must be some selective particle retention in the browsing ruminant as well, as a certain fraction of large particles in RR contents does not occur in the caecal/rectal material. These results lead to the explanatory dilemma that, while selective particle retention is observed, it cannot be due to the mechanisms known to work in grazing ruminants.
Sustainable Synthesis of Balsalazide and Sulfasalazine Based on Diazotization with Low Concentrations of Nitrogen Dioxide in Air
作者:Dagmar Hofmann、Eva Gans、Jasmin Krüll、Markus R. Heinrich
DOI:10.1002/chem.201605359
日期:2017.3.23
Low concentrations of nitrogendioxide, which arises as a side product from a range of industrial processes, can effectively be recycled through the diazotization of anilines. The studies reported herein now demonstrate that the removal of nitrogendioxide from gas streams is even more effective when hydrophilic anilines are used as starting materials. The diazonium salts, which are obtained in this