A donor–acceptor–donor (D–A–D) type monomer (3,6-bis(2-(3,4-ethylenedioxy thiophene))pyridazine, EPE) with pyridazine as an intermediate unit (acceptor) and 3,4-ethylenedioxythiophene (EDOT) as a sealing unit (donor) was prepared. The monomer was then polymerized by adjusting various ratios of FeCl3/monomer to prepare a donor–acceptor–donor (D–A–D) type conjugated polymer: poly(EPE). The result...

An lp oblivious subspace embedding is a distribution over r × n matrices Π such that for any fixed n× d matrix A, Pr Π [for all x, ‖Ax‖p ≤ ‖ΠAx‖p ≤ κ‖Ax‖p] ≥ 9/10, where r is the dimension of the embedding, κ is the distortion of the embedding, and for an n-dimensional vector y, ‖y‖p = ( ∑n i=1 |yi|) 1/p is the lp-norm. Another important property is the sparsity of Π, that is, the maximum numbe...

In the present paper we prove a statement closely related to the cyclic formality conjecture [Sh]. In particular, we prove that for a volume form Ω and a Poisson bivector field π on Rd such that divΩ π = 0, the Kontsevich star-product [K] with the harmonic angle function is cyclic, i.e. ∫ Rd (f ∗ g) · h · Ω = ∫ Rd (g ∗ h) · f · Ω for any three functions f, g, h on Rd (for which the integrals ma...

The poly(A) site of bovine prolactin (bPRL) mRNA was examined by phased priming of cDNA synthesis with oligodeoxynucleotides of the general sequence d(pT8-N-N'). The existence of multiple poly(A)-adjacent sequences in bPRL mRNA was indicated by the production of specific chain-termination fragments with at least three d(pT8-N-N') sequences. Comparison of the sequence bands produced by initiatio...

As with other guanine-rich sequences, poly[d(GGA)], poly[d(GA)] and poly[d(GAA)] probably form four-stranded or tetraplex structures. Thermal denaturation profiles were measured for these polymers at pH8 in the presence of Na+, NH4+, K+, Cs+, Mg2+, Ca2+ and Ba2+. For poly[d(GA)], Na+, NH4+, K+ stabilize the tetraplex to similar extents and the Tm increases with increasing ionic strength. In con...

methoxy poly(ethylene glycol) (mpeg) with molecular mass of 5 kda activated with succinimidyl carbonate and cyanuric chloride, separately was covalently attached to human red blood cells (rbcs). inhibition of agglutination by blood-type specific antisera (anti-d) was employed to evaluate the effect of the polymer coating. the remaining single cells after incubation with anti-d sera were counted...

in this study, porous scaffolds from poly(d,l-lactic acid) have been prepared via liquid- liquid phase separation method in ternary system of polymer-1,4-dioxane-water. polymer dissolved in dioxane in 1.5, 2.5 and 5 % wt/v and the solvent/non-solvent ratios were 13/87, 15/85 and 17/83. cloud point curves prepared by visual turbidometry. in order to obtain porous scaffolds with inter-connected p...

Different procedures have been used in attempts to increase the production of interferon by polyriboinosinic acid-polyribocytidylic acid (poly [rI].poly [rC]) in mice: simultaneous injection of lead acetate, cycloheximide, or actinomycin D and prior injection of Freund's adjuvant, chlorite-oxidized oxyamylose (COAM), endotoxin, or Brucella abortus. In the experimental conditions tested, lead ac...

The role of thymus in antibody responses to a series of four synthetic polypeptide immunogens of the general formula multi-copoly(Tyr,Glu)-poly(Pro)-poly(Lys) was investigated as a function of the optical activity of the amino acids composing their structure. Irradiated nonthymectomized and thymectomized SJL mice were injected with thymocytes, marrow cells, or a mixture of both. Each group of r...