Intravenous administration of cell-free Hb induces vasoconstriction and circulatory disorders, presumably because of the intrinsic affinities to endogenous nitric oxide (NO) and carbon monoxide (CO) as vasorelaxation factors and because of the facilitated O(2) release that might induce autoregulatory vasoconstriction. We examined these gas reactions when Hb-containing solutions of four kinds we...

Oblivious low-distortion subspace embeddings are a crucial building block for numerical linear algebra problems. We show for any real p, 1 ≤ p < ∞, given a matrix M ∈ R with n ≫ d, with constant probability we can choose a matrix Π with max(1, n)poly(d) rows and n columns so that simultaneously for all x ∈ R, ‖Mx‖p ≤ ‖ΠMx‖∞ ≤ poly(d)‖Mx‖p. Importantly, ΠM can be computed in the optimal O(nnz(M)...

BACKGROUND We assessed the bioavailability of orange juice (poly)phenols by monitoring urinary flavanone metabolites and ring fission catabolites produced by the action of the colonic microbiota. OBJECTIVE Our objective was to identify and quantify metabolites and catabolites excreted in urine 0-24 h after the acute ingestion of a (poly)phenol-rich orange juice by 12 volunteers. DESIGN Twel...

Given an n-bit to n-bit MAC (e.g., a fixed key blockcipher) with MAC security ε against q queries, we design a variable-length MAC achieving MAC security O(εq poly(n)) against queries of total length qn. In particular, our construction is the first to break the “birthday barrier” for MAC domain extension from noncompressing primitives, since our security bound is meaningful even for q = 2/poly(...

Procedures are described for synthesis via solid support methodology of oligonucleotide analogues derived in part from 3'-amino-3'-deoxythymidine or 5'-amino-5'-deoxythymidine. Oligothymidylate decamers terminated with a 3'-amino group or containing a 3'-NHP(O)(O-)O-5' internucleoside link are found to form unusually stable complexes with poly(dA), poly(A), and oligo(dA). For related derivative...

Site-specific chemical reactions following core excitation of poly-(methyl methacrylate) (PMMA) and poly-(isopropenyl acetate) (PiPAc) thin films were investigated. New x-ray absorption spectra of PMMA and PiPAc at the C and O K edges and theoretical spectra within the framework of density functional theory using model molecules were reported, and some new peak assignments were proposed for the...

In a novel application, infrared spectroscopic ellipsometry is used to provide clear evidence for the formation of a covalent bond at a polymer/polymer interface. Specifically, there is evidence for the formation of a Si-O-C bond resulting from a reaction between the silyl (SiH) group of a poly(hydrogen methyl siloxane) crosslinker used in poly(dimethyl siloxane) and the carboxylic acid group o...

We consider the computational complexity of languages of symbolic dynamical systems. In particular, we study complexity hierarchies and membership of the non-uniform class P/poly. We prove: 1. For every time-constructible, non-decreasing function t(n) = ω(n), there is a symbolic dynamical system with language decidable in deterministic time O(nt(n)), but not in deterministic time o(t(n)). 2. Fo...

In the title compound, {[Ce(C(8)H(7)O(3))(2)(NO(3))(H(2)O)(2)]·H(2)O}(n), the Ce(III) ion is coordinated by eight O atoms from four 2-(4-hy-droxy-phen-yl)acetate (HPAA) ligands, two O atoms from the chelating nitrate anion and two water mol-ecules in a distorted bis-capped quadrangular prismatic geometry. The HPAA ligands coordinate in a bridging tridentate mode. In the crystal, inter-molecular...

In the title complex, [Dy(C(7)H(3)NO(4))(C(7)H(4)NO(4))](n), one of the ligands is fully deprotonated while the second has lost only one H atom. Each Dy(III) ion is coordinated by six O atoms and two N atoms from two pyridine-2,6-dicarboxyl-ate and two 6-carboxy-picolinate ligands, displaying a bicapped trigonal-prismatic geometry. The average Dy-O bond distance is 2.40 Å, some 0.1Å longer than...