A new synthetic pathway to various mono-alkyl-substituted phosphinoboranes HRP–BH2–NMe3 has been developed. The route starting from alkyl halides and NaPH2 followed by metalation salt metathesis is performed in a one-pot procedure leads higher yields purity of the resulting phosphinoboranes, as compared previously reported routes. Additionally, scope accessible compounds could be expanded short...

Rapid and in-depth exploration of the chemical space high-molecular-weight synthetic polypeptides via ring-opening polymerization N-carboxyanhydride allows discovery protein mimics functional biomaterials. The traditional workflow, however, is labour intensive has limited throughput. Here we develop an approach for high-throughput diversification based on a click-like reaction between selenolat...

The relativistic Hermite polynomials (RHP) were introduced in 1991 by Aldaya et al. [3] in a generalization of the theory of the quantum harmonic oscillator to the relativistic context. These polynomials were later related to the more classical Gegenbauer (or more generally Jacobi) polynomials in a study by Nagel [4]. For this reason, they do not deserve any special study since their properties...

We study the asymptotics of recurrence coefficients for monic orthogonal polynomials πn(z) with the quartic exponential weight exp[−N( 1 2z2 + 14 tz)], where t ∈ C and N ∈ N, N → ∞. Our goal is to describe these asymptotic behaviors globally for t ∈ C in different regions. We also describe the “breaking” curves separating these regions, and discuss their special (critical) points. All these pie...

DC grid interfaces for supercapacitors (SCs) are expected to operate with a wide range of input voltages fast dynamics. The class-C DC-DC converter is commonly used in this application because its simplicity. However, it does not work if the output voltage (V2) becomes smaller than (V1). non-isolated bi-directional Buck–Boost have limitation. Its two half-bridges provide means controlling power...

RESUMO O uso de séries históricas registros hidrológicos é uma das ferramentas base para a gestão dos recursos hídricos, contudo diversas regiões não possuem históricos longos. Dessa forma, o objetivo geral deste trabalho foi definir tamanho série amostral ideal vazões mínimas. Foram utilizadas 19 estações fluviométricas da Região Hidrográfica Paraná (RHP) e outras 35 São Francisco (RHSF), com ...

An important issue in control structure selection is the plant ”stabilization”. By the term ”stabilize” we here include both modes which are mathematically unstable (modes with RHP poles) as well as ”drifting” modes which need to be kept within limits to avoid operational problems. By this definition, we can include the states x as variables that should be ”stabilized”, i.e., we want to avoid t...

Hydrogen peroxide (H2O2) released by neutrophils is an important mediator of endothelial cell (EC) injury and vascular inflammation via its effect on EC-free Ca2+, [Ca2+]i. Although the underlying mechanisms are not well understood, platelet endothelial cell adhesion molecule (PECAM)-1/CD-31 is a critical modulator of neutrophil-EC transmigration. PECAM-1 is also known to regulate EC calcium si...