Novel silylium ions with N-heterocyclic imines were successfully synthesized. The reaction of trimethylsilyl imidazolin-2-imine Me₃SiNIPr (NIPr = bis(2,6-diisopropylphenyl)-imidazolin-2-imino) with B(C₆F₅)₃ leads to dimeric imino-substituted silylium ions through a methyl group abstraction on the silicon atom. Meanwhile, the intermolecular imino-coordinated silylium ion is formed by using the l...

INTRODUCTION The management of esophageal strictures has evolved from surgical treatment to the endoscopic dilation and, more recently, esophageal stenting. CLINICAL CASE We describe a case of a two-year-old boy with a double stenosis of the esophagus resulting from accidental ingestion of strong alkaline liquid. After several unsuccessful endoscopic dilations for three years and even topical...

The reactions of [2+3] cycloaddition of pyridylnitrile oxides to vinyl- and allylgermanes proceed regioselectively and afford 5-Ge-substituted isoxazolines-2. We have synthesized 9 new pyridyl substituted 5-Si(Ge)-isoxazolines-2 and investigated their biological activity. The vasodilating, anticoagulant and cardioprotective activities of 5-Si(Ge) substituted isoxazolines-2 have been studied in ...

In this chapter, a system-on-chip design of the newest powerful standard in the hash families, named Whirlpool, is presented. With more details an architecture and two very large-scale integration (VLSI) implementations are presented. The first implementation is suitable for high speed applications while the second one is suitable for applications with constrained silicon area resources. The ar...

The crystal structure of two samples of bazzite, from the Baveno granite, in Piemonte, Italy (type locality, miarolitic occurrence) and from T0rdal, Norway (pegmatitic occurrence), has been retlned. Compared to material from Alpine fissures, these specimens contain greater amounts of heavy alkali ions (Cs+, Rb+, and K+) in the channels and minor quantities of magnesium in the octahedral positio...

The utilization of recycled brick aggregate (RBA) and powder (RBP) in cementitious materials helps the reclamation clay waste construction demolition waste. This work studied properties with RBA as RBP supplementary material. has lower apparent density higher water absorption than natural aggregate, an irregular micro-structure contains high content silicon aluminum oxides possesses excellent p...

High-purity (SupT) and reagent-grade (ST), stoichiometric and silicate-containing α-tricalcium phosphate (α-TCP: ST0/SupT0 and Si-TCP x=0.10: ST10/SupT10) were prepared by solid-state reaction based on the substitution mechanism Ca3(PO4)(2-x)(SiO4)x. Samples were determined to be phase pure by X-ray diffraction (XRD), and Rietveld analysis performed on the XRD data confirmed inclusion of Si in ...

abstract:any effects of wood coating with different compounds as nano-zinc, nano-chitosan, chitosan, silicon oil and flaxseed oil on surface properties as; wood color change, surface roughness and wettability were studied in the current research work. for this purpose, sample boards of beech wood were cut into sizes of 2×10×20cm. the specimens were coated with the noticed coatings and tested fo...