Some new compounds based on bis-benzimidazole moieties have been synthesized and characterized by IR and NMR spectroscopies. The ability of 3a in transition metal cation sensing such as Co2+, Ni2+, Zn2+, Mn2+, Fe2+ and Cu2+ have been investigated by Uv-vis and fluorescence spectroscopy in methanol solvent. The complexation constants and complex stoichiometry of Cu2+ have been determined. The ex...

Research has shown that group IVB nitrides have a narrow direct electronic band gap, but there been few investigations into the dependence of gap on cation defects and whether tuning is possible by controlling level substitutional oxygen in c-Zr3–x(N1–xOx)4. We use combination soft X-ray spectroscopy density functional theory to study structure determine as well exciton binding energy an oxygen...

BaTiO3 is a technologically relevant material in the perovskite oxide class with above room temperature ferroelectricity and very large electro optical coefficient, making it highly suitable for emerging electronic photonic devices. An easy, robust, straightforward, scalable growth method required to synthesize epitaxial thin films sufficient control over film stoichiometry achieve reproducible...

The KCNQ1 voltage-gated potassium channel and its auxiliary subunit KCNE1 play a crucial role in the regulation of the heartbeat. The stoichiometry of KCNQ1 and KCNE1 complex has been debated, with some results suggesting that the four KCNQ1 subunits that form the channel associate with two KCNE1 subunits (a 42 stoichiometry), while others have suggested that the stoichiometry may not be fixed....

Understanding the geographic patterns and potential drivers of leaf stoichiometry is critical for modelling the nutrient fluxes of ecosystems and to predict the responses of ecosystems to global changes. This study aimed to explore the altitudinal patterns and potential drivers of leaf C∶N∶P stoichiometry. We measured the concentrations of leaf C, N and P in 175 plant species as well as soil nu...

background: lip carcinoma is a common cancer with a good prognosis and when patients refer early in the course of disease the results of treatment are acceptable. surgical procedures for reconstruction of lip defects are the use of remaining lip tissue, tissue from the opposite lip, adjacent cheek tissue, distant flaps and microvascular free flaps. the bitemporal (visor) flap is a regional flap...

We demonstrate the benefits of a convex geometric perspective for questions on chemical stoichiometry. We show that the balancing of chemical equations, the use of “mixtures” to explain multiple stoichiometry, and the half-reaction for balancing redox actions all yield nice convex geometric interpretations. We also relate some natural questions on reaction mechanisms with the enumeration of lat...

Niobate perovskites like the (K,Na)NbO3 (KNN) family are among most important lead-free ferroelectrics. Ba and Ni have been co-doped into KNN to induce Ni2+-oxygen vacancy defect dipoles significantly reduce band gap while maintaining ferroelectricity. This opens doors novel optoferroelectric applications such as multisensors photocatalysts. However, obtaining a single phase of above is difficu...

This paper initially fits a comprehensive set of thermodynamic and transport properties charged mobile defects (protons, oxygen vacancies, small polarons) in proton-conducting BaZr 0.8 Y 0.2 O 3− δ (BZY20). The are based on recently published measurements, including conductivity, proton concentrations via Karl–Fischer titration, non-stoichiometry thermogravimetric analysis, all with wide ranges...

HIV-1 enters target cells by virtue of envelope glycoprotein trimers that are incorporated at low density in the viral membrane. How many trimers are required to interact with target cell receptors to mediate virus entry, the HIV entry stoichiometry, still awaits clarification. Here, we provide estimates of the HIV entry stoichiometry utilizing a combined approach of experimental analyses and m...