Abstract Amino acid decorated imidazole, pyrimidine and purine derivatives, resembling analogues of peptide nucleic acid's building blocks, have been synthesized by a three‐way multicomponent chemistry diaminomaleonitrile, one the most studied chemical precursors in prebiotic chemistry. The regioselectivity reaction between trimethyl orthoacetate selected panel α‐amino acids, was controlled ene...

in this paper, 4,4ʹ-bipyridinium dichloride  supported sba-15 (sba@bipy2+ 2cl-) was used for the synthesis of dihydropyrimidinones. the synthesized catalyst was characterized by ft-ir spectroscopy, scanning electron microscopy (sem), transmission electron microscopy (tem) and thermogravimetric analysis (tga). this nanocomposite was shown to be an efficient heterogeneous catalyst for the synthes...

Land multicomponent seismic has garnered significant attention and demonstrated substantial growth in the last five years. The bulk of this growth in multicomponent activity has been in western Canada. While multicomponent seismic has been around for many years, historical cost and quality concerns have limited its use as a routine exploration tool. The current resurgence of multicomponent seis...

Dioxidovanadium(V) complex [VVO2(sal-aebmz)] (1) (where Hsal-aebmz = Schiff base derived from the condensation of salicylaldehyde and 2-aminoethylbenzimidazole) has been immobilized on chloromethylated polystyrene (PS-Cl) cross-linked with divinylbenzene to obtain [VVO2(sal-aebmz)]@PS (2), a heterogeneous complex. Both complexes, after characterization, have used as catalysts explore single pot...

introduction: the purpose of this study was to evaluate the sealing ability of 3 obturation techniques in oval-shaped canals by bacterial leakage assessment. methods: sixty mandibular incisors with oval canals were selected after providing buccolingual and mesiodistal radiographs. the teeth were sectioned at a 10 mm distance from the apex. after instrumentation, the teeth were divided into 3 gr...

Since the acceleration of different wind species may be different, their wind velocities may differ and so hot star winds have a multicomponent nature. For high density winds (e.g. of galactic O stars) this multicomponent nature does not influence the wind structure, however for low density winds multicomponent effects occur, for example frictional heating, decoupling of wind components, etc. (...

We develop a formalism of multicomponent BKP hierarchies using elementary geometry of spinors. The multicomponent KP and the modified KP hierarchy (hence all their reductions like KdV, NLS, AKNS or DS) are reductions of the multicomponent BKP.

By the immobilization of bipyridinium chloride onto mesoporous MCM-41encapsulated Fe3O4 nanoparticles via a simple post-synthesis method, a totally new organic-inorganic hybrid nanocomposite was formulated. The heterogeneous hybrid nanomagnetic composite was characterized by <spa...

The Community Preventive Services Task Force recently posted on its website new information regarding recommendations for multicomponent interventions for three different cancers: 1) “Increasing Cancer Screening: Multicomponent Interventions — Breast Cancer,” https://www.thecommunityguide.org/findings/cancer-screening-multicomponentinterventions-breast-cancer; 2) “Increasing Cancer Screening: M...