Structural, photoluminescence and energy transfer investigations of novel Dy → Sm co-doped NaCaPO phosphors for white-light-emitting diode applications.

In this study, Dy-doped and Dy/Sm co-doped NaCaPO white-emitting polycrystalline phosphor samples were synthesized using a solid-state reaction method. The samples were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field-emission scanning electron microscopy (FE-SEM), and Photoluminescence (PL) analysis. The phase purity characterization and crystal structural analysis were done using the Rietveld refinement-based FullProf Suite software.

Bifunctional Zirconium Phosphate with Greigite for Electrochemical Detection and Simultaneous Removal of Heavy Metal Ions and Nitro Compounds.

Electrochemical sensing is emerging as a method of choice for the sensing and monitoring of contaminants in water. Various sensing platforms have been designed for sensing heavy metal ions and organic pollutants in water bodies. Herein, we report a new electrochemical platform that can be used for the detection of both heavy metal ions and nitro-based organic contaminants in water bodies.

Electrophysiological changes in patients with liver cirrhosis in a tertiary care hospital in Karachi, Pakistan.

Background: Electrophysiological changes in cirrhosis are well known but least investigated especially in our country hence we wanted to see electrophysiological changes especially QT interval in cirrhotic patients.

Methods: A cross-sectional study was conducted at Aga Khan University Hospital Karachi (AKUH) in which medical records (duration 2008-2010) of cirrhotic patients were reviewed.

Results: Three hundred and eighty cirrhotic patients' charts were studied, 227 (59.

The safety and efficacy of optical urethrotomy using a spongiosum block with sedation: a comparative nonrandomized study.

Purpose: Optical urethrotomy is generally performed with the patient under general or major regional anesthesia. We determined the safety and efficacy of optical urethrotomy using a spongiosum block with sedation for anterior urethral stricture in a comparative, nonrandomized study.

Materials And Methods: In 32 patients with anterior urethral stricture optical urethrotomy was performed under general/major regional anesthesia in 16 patients (group 1) or a spongiosum block and sedation in 16 (group 2).