Wells and Local ( 1983) intend to propose a thoroughly pragmatics-based explanationfor the unacceptability ofcertain instances ofaccented injinitival to, have, and be in English, in reaction to Zwicky and Levin’s (1980) argumentsfor a constraint couched in syntactic terms. A comparison ofthe two accounts serves as the vehicle for a discussion ofseveral larger issues: choosing between theoretica...

We study the D → σπ, D → ρπ, B− → σπ−, B− → ρ0π− and B̄ → ρ±π∓ decays in a valence quark triangle model, incorporating chiral symmetries. We find a good agreement with recent experimental data for D → σπ and for D → ρπ. We point out that a long-distance contribution due to the axial vector a1 meson pole, calculated by using chiral symmetry, can be relevant to explain D → ρπ and for lowering the ...

This paper contains an investigation of some aspects of Romanian modality constructed with auxiliaries. These forms can be combined either with the infinitive, or with overt (imperfective /perfective) aspectual morphology. In the latter case, they might give rise to interpretations which have been classified in Romanian grammars as presumptive (broadly described as referring to probability, unc...

synthesis of some new monocyclic β-lactams containing a quaternary carbon center via a [2+2]cycloaddition reaction is described. the reaction of achiral diphenyl ketene with chiral aldimines derivedfrom chiral 2, 3, 4, 6-tetra-o-acetyl-β-d-galactopyranosylamine, 2, 3, 4, 6-tetra-o-acetyl-β-dglucopyranosylamine and different benzaldehydes resulted in the formation of β-lactams as singlediastereo...

Multinuclear organometallic species play a significant role in alkylation of carbonyl compounds. Enantioselective alkylation of aldehydes using a 1: 1 reagent/substrate stoichiometry is achievable by chirally modified lithium/magnesium binary organometallic reagents. For example, diethylmagnesium treated with di-O-lithio-(S)-2.2'dihydroxy1, 1'-binaphthyl reacts with benzaldehyde in a THFdimetho...

The loop algebra L(sl2) symmetry is found in a sector of the nilpotent BazhanovStroganov model. The Drinfeld polynomial of a L(sl2)-degenerate eigenspace of the model is equivalent to the polynomial [4, 5, 10–14] which characterizes a subspace with the Isinglike spectrum of the superintegrable chiral Potts model.

Chiral phosphines are essential ligands for asymmetric transitionmetal-catalyzed transformations.1 In 1972, Knowles and co-workers reported the first practical and highly asymmetric hydrogenation using P-stereogenic phosphines,2 yet planar chiral and point chiral phosphines are the most commonly employed ligands today. P-Stereogenic phosphines are less often utilized, in part due to the lack of...