We study a transmission problem in high contrast media. The 3-D case of the Maxwell equations in harmonic regime is considered. We derive an asymptotic expansion with respect to a small parameter δ > 0 related to high conductivity. This expansion is theoretically justified at any order. Numerical simulations highlight the skin-effect and the expansion accuracy. Introduction We consider the diff...

In metazoan the 3'-end processing of histone mRNAs is a conserved process involving the concerted action of many protein factors and the non-coding U7 snRNA. Recently, we identified that the processing of histone pre-mRNAs is promoted by an additional ncRNA, the Y3-derived Y3** RNA. U7 modulates the association of the U7 snRNP whereas Y3** promotes recruitment of CPSF (cleavage and polyadenylat...

Heat shock or transfection with heat shock protein 70 (Hsp70) genes has been shown to protect tumor cell lines against immune mechanisms of cytotoxicity. We have reported previously that heat shock confers resistance to CTL in the rat myeloma cell line Y3 that is Hsp70 defective. Evidence is now presented that Hsp70 is able to prevent the induction of the resistant phenotype. In Con A-stimulate...

Let K 3,3 be the 3-graph with 15 vertices {xi, yi : 1 ≤ i ≤ 3} and {zij : 1 ≤ i, j ≤ 3}, and 11 edges {x1, x2, x3}, {y1, y2, y3} and {{xi, yj , zij} : 1 ≤ i, j ≤ 3}. We show that for large n, the unique largest K 3,3-free 3-graph on n vertices is a balanced blow-up of the complete 3-graph on 5 vertices. Our proof uses the stability method and a result on lagrangians of intersecting families tha...

The reaction of bis(diphenylphosphino)methane dioxide (dppmO2) with LaCl3, LaI3 or LaCl3/[NH4][PF6] produces [La(dppmO2)4]Y3 (Y = Cl, I, PF6) which contain eight-coordinate, distorted square antiprismatic cations. In contrast, LaCl3 or LaCl3/[NH4][PF6] and 1,2-bis(diphenylphosphino)ethane dioxide (dppeO2) produce the polymer [LaCl3(dppeO2)1.5]n, which has a six-coordinate La centre with three m...

This work is devoted to the crystallization and investigation of optical properties single crystalline films (SCFs) Ce3+-doped Y3−xCaxAl5−ySiyO12 garnet, where content Ca2+ Si4+ cations varied in x = 0.13–0.52 y 0.065–0.5 ranges, respectively. The SCF samples were grown using liquid phase epitaxy technique onto Y3Al5O12 substrates from melt solution with equimolar Ca Si PbO-B2O3 flux. However, ...

Previous work from this laboratory has indicated that intramolecular homologous recombination of polyomavirus (Py) DNA is dependent upon promoter structure or function. In this report, we demonstrate that Py DNA contains not two but three binding sites for transcription factor YY1, all located on the late side of viral origin of replication (ori) and the third well within the VP1 coding sequenc...