We consider completely irrational nilflows on any nilmanifold of step at least 2. show that there exists a dense set smooth time-changes such time-change in this class which is not measurably trivial gives rise to mixing nilflow. This particular reproves and generalizes nilflow (of 2) the main result proved [3] for special Heisenberg (step nilflows, later generalized [58] arbitrary are isomorph...

We present rheological experiments of confined suspensions at moderate concentrations. The analysis is carried out in the framework of a previous study on particle suspensions [Davit and Peyla, EPL, 83, 64001 (2008)] where simulations revealed the presence of unusual effects attributed to confinement, i.e. when the gap size (h) becomes closer to the particle size (d). Deviations from the usual ...

Let k be a field and let D be a k-linear algebraic triangulated category with split idempotents. Let Σ be the suspension functor of D and let s be a 2-spherical object of D, that is, the morphism space D(s,Σs) is k for i = 0 and i = 2 and vanishes otherwise. Assume that s classically generates D, that is, each object of D can be built from s using (de)suspensions, direct sums, direct summands, ...

A real-time PCR assay method was established to monitor Leuconostoc spp. populations via specific amplification of the dextransucrase gene. Quantification of L. mesenteroides B-512F using both genomic DNA and cell suspensions yielded a log-linear correlation spanning approximately 5 log units. By using this method, monitoring changes of Leuconostoc spp. during sauerkraut fermentation was succes...

Colloidal suspensions aging under gravity have long been known to spontaneously separate into layers. We demonstrate through flow visualization experiments that a lateral temperature gradient as small as 10 mKycm can be responsible for such stratification and that strata correspond to a stack of convection rolls. A linear stability analysis suggests that the onset of stratification results from...

The theory accounting for nonlinear particle relaxation (viscous and thermal) has been applied to the prediction of dispersion of sound in dilute suspensions. The results suggest that significant deviations exist for sound dispersion between the linear and nonlinear theories at large values of omegatau(d), where omega is the circular frequency and tau(d) is the Stokesian particle relaxation tim...

Del University of Technology, Departm Maasweg 9, 2629 HZ Del, The Netherland Wetsus – European Centre of Excellen Oostergoweg 9, 8932 PG Leeuwarden, The N Wageningen University & Research, Labora 6708 WE Wageningen, The Netherlands. E-m † Electronic supplementary informatio synthesized PAH–Gu (Fig. S1), pictur suspensions (Fig. S2 and S3). Pseudo se pseudo second-order non-linear curve  10.1...

Rheological and electrical properties of polymeric nanoparticle solutions and their influence on the rheological and electrical properties of red blood cell (RBC) suspensions have been studied. Poly(acrylic acid) macromolecules of different architecture and molecular weight were used: (i) a new core-shell type star polymer whose interior forms hyperbranched polystyrene bearing arms of poly(acry...