Numerous technical advances in the area of polymer light emitting diodes (PLEDs) have been made since their discovery in 1990 by Friend et al at Cambridge University . PLEDs are derivatives from the more commonly known LED (light emitting diode) devices. LEDs are solid-state semiconductor devices that convert electrical energy into light. They are typically used as indicator lights and numeric ...

Since 1994, the Applied Physics Laboratory has been collaborating with NASA Goddard Space Flight Center to develop photodetectors based on gallium nitride and aluminum gallium nitride material produced in the Milton S. Eisenhower Research and Technology Development Center. This article describes the results of our collaboration and highlights the development of gallium nitride photodetectors wi...

Adam J. Hauser and Fengyuan Yang Department of Physics, The Ohio State University, 191 Woodruff Avenue, Columbus, Ohio 43210, USA (Dated: August 22, 2010) Abstract Ferromagnetic δ-phase manganese gallium layers with Mn/(Mn + Ga) = 60% have been successfully grown on ScN(001) by molecular beam epitaxy, expanding possibilities for ferromagnetic layers on nitride semiconductors. The in-plane epita...

A series of antimony-doped Ba(8)Ga(16)Ge(30) clathrates was grown as large crystals from gallium flux. These compounds form in the cubic space group Pm(-)3n, with the unit cell parameter varying from 10.784(5) to 10.9008(6) A as the amount of GaSb substituting for germanium atoms in the framework is increased. It was found that more antimony than extra gallium was incorporated into the material...

We have investigated the equilibrium melting point of gallium as a temperature fixed-point at which to calibrate small thermistor thermometers, such as those used to measure temperature in enzyme reaction analysis and other temperature-dependent biological assays. We have determined that the melting temperature of "6N" (99.999% pure) gallium is 29.770 +/- 0.002 degrees C, and that the constant-...

Introduction: The malignant lymphomas are the fifth most common neoplasm in both men and women. Staging, re-staging and treatment response evaluation pose a difficult task in many patients of lymphomas. Histological variants in both Hodgkin’s and Non-Hodgkin’s types of lymphoma greatly affect the response to treatment and overall prognosis. Objective: This study was conducted to correlate the d...

M F v t 65-year-old man with a history of recurrent lymphoma status-post matched sibling donor transplant presented ith swelling of the right testicle. Four years earlier, he had resented with right leg swelling, night sweats, and pelvic ain. Computed tomography (CT) scan showed bulky rightided pelvic adenopathy. Biopsy showed diffuse high-grade -cell lymphoma. The remainder of the staging eval...

A 63-year-old man with a history of hypertension and non-insulindependent diabetes mellitus had had fever, night sweats, and vertigo for 2 months. Digital rectal examination revealed a firm prostate containing a small , hard, centrally located nodule. No other abnormalities were detected on physical examination. Laboratory studies showed an elevated erythrocyte sedimentation rate, increased lev...

Introduction: Gallium-67 citrate has been known as a good infection agent in nuclear medicine for decades. In this work the value of Ga-citrate has been investigated in infected animal models using SPECT imaging at optimized/standardized conditions. Methods: The bacterial (Staphylococcus aureus; S.a. and Escherichia coli; E.c.) and fungal (Candidae albicans; C.a.) species from standard sources ...

In this paper, the structure of SAW has been studied. In previous work in SAW, materials such as lithium niobium, lithium tantalite and gallium nitride were used in the structure of SAW, and thus had a low operating frequency and the highest reported operating frequency was about 4 GHz. In this paper, aluminum nitride and gallium nitride in the SAW structure are used in combination. The electro...