The ammonium salts of many drugs have significantly improved the solubility and, accordingly, bioavailability medicinal substances in human body. 5-(4-Hydroxy-2-oxo-2H-chromen-3-yl)-5H-chromeno[2,3-b]pyridines are potential NPY1R ligands, which attractive for antiobesity treatment. Ammonium 5H-chromeno[2,3-b]pyridines were previously unknown. In this communication, it was found that four-compon...

This paper reports the feasibility of biopsy needle tract cauterization and cauterization monitoring using an embedded array of piezoceramic microheaters. Circular heaters of lead zirconate titanate (PZT-5A), with 200 μm diameter and 70-80 μm thickness, are fabricated using a batch mode micro ultrasonic machining process. These are then assembled into cavities in the walls of 20-gauge stainless...

In this study, new impedance measurement techniques are developed specially for structural health monitoring of large-scale structures. Electromechanical (EM) impedance based damage detection techniques, which utilize the electromechanical coupling effect between a piezoelectric transducer such as lead zirconate titanate (PZT) and a host structure, have been shown to be very sensitive to local ...

Fiber reinforced polymeric composites can be employed for the construction of structures that are highly durable and easy to fabricate. At EMPA, a prototype footbridge with girders and deck made of pultruded composite sections has been designed and constructed. For thin-wall pultruded sections such as I-beam or T-beam, delaminations can form easily at the web/flange junction. If the delaminatio...

The effect of MnO2 addition on the microstructural evolution and piezoelectric properties of low temperature sinterable PZT–PZN ceramics was investigated. When a small amount of MnO2 (≤0.5 wt% ) was added, the Mn ions were homogeneously dissolved in the PZT– PZN ceramics, leading to full densification at a temperature as low as 930 °C. However, the further addition of MnO2 hindered the densific...

Automation ProTune, ProTune-PZT/OneNMR probe support Improved and unified support of ProTune and ProTune-PZT is provided. This includes automatically setting the RF phase with a reboot of the console. Other enhancements also include increased sensitivity of tuning data averaging; added phase correction for propagation delay in the probe; enhanced status reporting; better handling of exceptional...

Magnetoelectric coupling effect of Ni1-xZnxFe2O4/PZT (NZFO/PZT) thin film heterostructures is investigated by tuning the Zn content in NZFO film. The highest magnetoelectric coefficient NZFO/PZT achieved at x=0.15 with value 328 mV/cm Oe. This various different induced distinct magnetostriction film, which related to piezomagnetic q and initial permeability μi layer, as well exchange interactio...

Phosphine-catalyzed highly enantioselective γ-additions of 5H-thiazol-4-ones and 5H-oxazol-4-ones to allenoates have been developed for the first time. With the employment of amino-acid derived bifunctional phosphines, a wide range of substituted 5H-thiazol-4-one and 5H-oxazol-4-one derivatives bearing heteroatom (S or O)-containing tertiary chiral centers were constructed in high yields and ex...

Abstract The use of an identical electrolyte in electrochemical metallization (ECM)-based neuron and synaptic devices has not yet been achieved due to their different resistive-switching characteristics. Herein, we describe ECM comprising the same ferroelectric PbZr 0.52 Ti 0.48 O 3 (PZT) electrolyte, which can sustain both behavior depending on identity active electrode. Ag/PZT/La 0.8 Sr 0.2 M...