A good LED phosphor must possess strong enough absorption, high quantum yields, colour purity, and quenching temperatures. Our synthesized Y2Mo4O15:Eu(3+) phosphors possess all of these properties. Excitation of these materials with near-UV or blue radiation yields bright red emission and the colour coordinates are relatively stable upon temperature increase. Furthermore, samples doped with 50%...

The purpose of this article is two fold. First, we show how quasi-periodic solutions for theN-body problem can be constructed by variational methods. We illustrate this by constructing uncountably many quasi-periodic solutions for the fourand six-body problems with equal masses. Second, we show by examples that a system of N masses can possess infinitely many simple or multiple choreographic so...

We present the results of a 10.5 yr, volume limited (28Mpc) search for supernova (SN) progenitor stars. In doing so we compile all SNe discovered within this volume (132, of which 27% are type Ia) and determine the relative rates of each sub-type from literature studies. The core-collapse SNe break down into 59% II-P and 29% Ib/c, with the remainder being IIb (5%), IIn(4%) and II-L (3%). There ...

N ASSOCIATION between hepatocellular carcinoma and pol cythemia was reported in 1958 by McFadzean, Todd and Tsang’ who found the red cell mass to be increased in 17 of 28 patients investigated. The red cell masses were calculated from the plasma volumes determined by the T-1824 dye method. When radioactive isotopes became available it was decided further to investigate the red cell mass in hepa...

Although the relevant properties of bismuthinite Bi2S3, it was recently approved that substitution Se atoms in Bi2S3 lattice can significantly enhance its electro-optical properties. In present work, a detailed study on structural, electronic and optical Bi2S2.75Se0.25 has been carried out based first principle calculations. The simultaneous effect Se-doping spin–orbit coupling (SOC) bismuth su...

Abstract We study the possible existence of deconfined quark matter in the interior of neutron stars using the Nambu–Jona-Lasinio model to describe the quark phase. We find that typical neutron stars with masses around 1.4 solar masses do not possess any deconfined quark matter in their center. This can be traced back to the property of the NJL model which suggests a large constituent strange q...

Red palm oil (RPO) contains high concentrations of beta- and alpha-carotene, and is presumed to possess a higher vitamin A value than other foods. The objective was to determine the metabolic vitamin A and carotene values of refined red palm oil in healthy adult subjects, using a stable isotope reference method. Twelve healthy subjects were administered a small standardised meal containing 10 g...