In the title compound, C11H11NO3, the di-hydro-furan-2,5-dione ring has a shallow envelope conformation, with one of the methyl-ene C atoms displaced by 0.216 (1) Å from the other atoms. These near-planar atoms subtend a dihedral angle of 55.88 (8)° with the benzene ring. In the crystal, C-H⋯O hydrogen bonds link the mol-ecules into [010] chains.

NotI and SfiI genomic restriction maps were used to detect and characterize a ring chromosome II in a Schizosaccharomyces pombe strain with a meiotic defect on chromosome II. The ring chromosome was formed by an intrachromosomal fusion near, or at, the very ends of chromosome II.

In his classical paper 1 , Chang invented the notion of MV-algebra in order to provide an algebraic proof of the completeness theorem of infinite valued Lukasiewicz propositional calculus. Recently, the algebraic theory of MV-algebras is intensively studied, see 2–5 . The notion of derivation, introduced from the analytic theory, is helpful to the research of structure and property in algebraic...

Fano resonances in plasmonic nanostructures, generated by the spectral interference between a broad resonance or continuum and narrow resonance, have attracted significant interest recent literature. Herein, introducing nanodisc next to nanoring via electron beam lithography, set of for such ring-disc-pair (RDP) hybrid is confirmed through coupling dipolar disc mode different multipolar bonding...

In the title compound, C16H16N2, the dihydro-pyrazole ring adopts a shallow envelope conformation, with the C atom bearing the phenyl group displaced by 0.298 (2) Å from the other atoms (r.m.s. deviation = 0.015 Å). The dihedral angles between the four near coplanar atoms of the central ring and the N- and C-bonded phenyl groups are 13.49 (13) and 82.22 (16)°, respectively.

The title compound, C17H11ClN2O2, which contains two stereogenic C atoms, crystallizes in a centrosymmetric space group as a racemate. The pyran ring and the isoxazole ring adopt sofa and twisted conformations, respectively. The dihedral angle between the benzene ring and the mean plane through the near coplanar atoms of the pyran ring is 4.17 (5)°. The mol-ecular conformation features a weak C...

Let N be a prime Γ-near ring with multiplicative center Z. Let σ and τ be automorphisms of N and δ be a Γ− (σ, τ)-derivation of N such that N is 2-torsion free. In this paper the following results are proved: (1) If σγδ = δγσ and τγδ = δγτ and δ(N) ⊆ Z, or [δ(x), δ(y)]γ = 0, for all x, y ∈ N and γ ∈ Γ, then N is a commutative ring. (2) If δ1 is a Γ-derivation, δ2 is a Γ − (σ, τ) derivation of N...

In the mol-ecule of the title compound, C(17)H(13)N(3)O(2), the naphthyl ring system and the pyridine ring form a dihedral angle of 12.2 (3)°. An intra-molecular O-H⋯N hydrogen bond generates a six-membered ring with an S(6) ring motif. This also contributes to the relative overall near planarity of the mol-ecule [r.m.s. deviation of all 22 non-H atoms = 0.107 (5) Å]. In the crystal, mol-ecules...

In the title compound, C(15)H(14)Cl(2)N(2)OS, the piperidine ring adopts a chair conformation. The dihedral angle between the thia-zolidine ring and the dichloro-benzene ring is 9.30 (4)°; this near coplanar conformation is stabilized by the formation of an intra-molecular C-H⋯S hydrogen bond, which generates an S(6) ring. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming [...

For a finite group G, let E(G) denote the near-ring of functions generated by the semigroup, End(G), of endomorphisms of G. We characterize when E(G) is maximal as a subnear-ring of M0(G). A group G is an E-group if E(G) is a ring. We give a new characterization of finite Egroups and investigate the problem of determining, for finite E-groups, when E(G) is maximal as a ring in M0(G). 2000 Mathe...