Processes mediated by small nucleophilic catalysts are currently experiencing a renaissance. In addition to competing with well-established metal-catalyzed reactions, there is a tempting opportunity to invert conventional reactivity patterns by exploiting the concept of polarity reversal (umpolung). Following this strategy, aldehydes can be turned into acylanion equivalents through covalent act...

In this paper, we present two new results of layered permutation densities. The first one generalizes theorems from Hästö (2003) and Warren (2004) to compute the permutation packing of permutations whose layer sequence is (1, l1, l2, . . . , lk) with 2−a−1 ≥ k (and similar permutations). As a second result, we prove that the minimum density of monotone sequences of length k + 1 in an arbitraril...

An overview is given of the use of symmetry considerations for aperiodic crystals. Superspace groups were introduced in the seventies for the description of incommensurate modulated phases with one modulation vector. Later, these groups were also used for quasi-periodic crystals of arbitrary rank. Further extensions use time reversal and time translation operations on magnetic and electrodynami...

Three possibilities for the origin of CP violation are discussed: (1) the Standard Model in which all CP violation is due to one parameter in the CKM matrix, (2) the superweak model in which all CP violation is due to new physics and (3) the Standard Model plus new physics. A major goal of B physics is to distinguish these possibilities. CP violation implies time reversal violation (TRV) but di...

The localization properties are investigated within a transfer matrix formulation. We find that there may exist one extended eigenstate when the rank of the transfer matrix is odd. An edge state in a quantum Hall system is such an example. It is a chiral state that can always carry a current. PACS numbers: 03.65.−w, 72.10.Bg, 73.20.Jc A non-interacting Schrödinger equation can be formulated int...

March 29, 2017 Version 3.0.0 Date 2016-09-16 Title Rank Product method for identifying differentially expressed genes with application in meta-analysis Author Francesco Del Carratore , Andris Janckevics Fangxin Hong , Ben Wittner , Rainer Breitling <r.breitling@b...

mancozeb, a fungicide of a manganese-zinc ethylenebisdithio-carbamate (ebdc), was administered by gavage at doses of 200, 400, 600 and 800 mg/kg/day to female virgin mice for 30 days. the mice were autopsied on 31st day. mice were also treated with similar doses for a period of 30 days and the treatment was withdrawn for a further period of 30 days for reversible study. the mice were autopsied ...

Abstract Technique for order preference by similarity to ideal solution (TOPSIS) is a well-known multi attribute decision making (MADM) method and it has been widely used in materials selection. However, the main drawback of traditional TOPSIS that rank reversal phenomenon. To overcome this drawback, we propose an improved without based on linear max-min normalization with absolute maximum mini...

Among the most extraordinary phenomena in nuclear magnetic resonance (NMR) is the spin echo [1]. Although the original spin echo and its analogs in other areas of spectroscopy [2] result from reversing the dephasing due to independent, "inhomogeneous" interactions, a true many-body spin echo resulting from a reversal of the (seemingly irreversible) decay due to "homogeneous" spin-spin couplings...