Complex Oxides under Simulated Electric Field: Determinants of Defect Polarization in ABO Perovskites.

Polarization of ionic and electronic defects in response to high electric fields plays an essential role in determining properties of materials in applications such as memristive devices. However, isolating the polarization response of individual defects has been challenging for both models and measurements. Here the authors quantify the nonlinear dielectric response of neutral oxygen vacancies, comprised of strongly localized electrons at an oxygen vacancy site, in perovskite oxides of the form ABO .

Direct Prediction of Phonon Density of States With Euclidean Neural Networks.

Machine learning has demonstrated great power in materials design, discovery, and property prediction. However, despite the success of machine learning in predicting discrete properties, challenges remain for continuous property prediction. The challenge is aggravated in crystalline solids due to crystallographic symmetry considerations and data scarcity.

Corrigendum to "Design of CGMP Production of F- and Ga-Radiopharmaceuticals".

[This corrects the article DOI: 10.1155/2014/680195.].

Design of CGMP production of 18F- and 68Ga-radiopharmaceuticals.

Objective: Radiopharmaceutical production process must adhere to current good manufacturing process (CGMP) compliance to ensure the quality of precursor, prodrug (active pharmaceutical ingredient, API), and the final drug product that meet acceptance criteria. We aimed to develop an automated system for production of CGMP grade of PET radiopharmaceuticals.

Methods: The hardware and software of the automated synthesizer that fit in the hot cell under cGMP requirement were developed.