371 research outputs found
Effect of ozone and vuv light in the presence of food components
The aim of the current work is the comparison of the ozone, ozone/UV, UV and UV/VU V induced destruction of a spore-former (Bacillus megaterium), a Gram positive (Micrococcus luteus) and a Gram negative (Serratia marcesens) bacterium in the presence of a model food component carbohydrate lactose, and carbohydrate and protein containing solution. In "clear" solutions both method was sufficient to achieve 1 or in most cases min. 2 order of magnitudes decrease of microorganisms. The Gram negative Serratia marcesens appeared to be the most sensitive, while the Bacillus megaterium and Micrococcus luteus were more resistant to the treatments. The presence of organic matter had affected to disinfecting efficiency of all methods in the case of all microorganism, but the effect depends on the type of the substrate. In the presence of protein and carbohydrate containing solution the situation is markedly different. It was found that lactose inhibits the disinfection, while protein increase the disinfection efficiency which can be explained by the formation of toxic degradation products derived from proteins
Poisson Reductions of Master Integrable Systems on Doubles of Compact Lie Groups
We consider three 'classical doubles' of any semisimple, connected and simply
connected compact Lie group : the cotangent bundle, the Heisenberg double
and the internally fused quasi-Poisson double. On each double we identify a
pair of 'master integrable systems' and investigate their Poisson reductions.
In the simplest cotangent bundle case, the reduction is defined by taking
quotient by the cotangent lift of the conjugation action of on itself, and
this naturally generalizes to the other two doubles. In each case, we derive
explicit formulas for the reduced Poisson structure and equations of motion and
find that they are associated with well known classical dynamical -matrices.
Our principal result is that we provide a unified treatment of a large family
of reduced systems, which contains new models as well as examples of spin
Sutherland and Ruijsenaars--Schneider models that were studied previously. We
argue that on generic symplectic leaves of the Poisson quotients the reduced
systems are integrable in the degenerate sense, although further work is
required to prove this rigorously.Comment: 33 pages, minor edits in v2, correction of small typos in v
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