In this study, alterations in glucose, blood enzymes (alkaline phosphatase (ALP), lactate dehydrogenase (LDH), alanine transaminase (ALT), aspartate aminotransferase (AST)) and serum ion (P, Mg, Cl, Ca, Fe) levels were investigated in Tilapia (Oreochromis mossambicus), which were semi-statically exposed to different lead concentrations in vivo. The fish were exposed to low (0.5 mg/L), medium (2...

The photoluminescence properties of Eu2+-activated α’-Sr2SiO4 and α’-Ba2SiO4 with a high Eu2+ concentration were investigated. In the case of Sr2−xEuxSiO4, emission was shifted from 585 to 611 nm with increasing the total Eu2+ concentration (x) from 0.1 to 0.8. This trend was similar to that in Ba2−xEuxSiO4, where the emission was shifted from 513 to 545 nm. The large redshifts in both the exci...

White-light emitting diode lamps for general illumination can be realized by a combination of a blue light-emitting diode semiconductor die and phosphors. Newly developed oxynitride and nitride phosphors are promising candidates for this application because they have suitable excitation and emission wavelengths and stable optical properties in a high temperature environment. High brightness war...

The use of a conventional streak camera for subnanosecond timeresolved fluorimetry is extended to the single-photon counting regime by utilizing intensified readout of the phosphor. The system achieves the usual k e y advantages of photon counting, namely single-photon sensitivity, large dynamic range and shot noise limited statistics, but also permits measurements of lower repetition rate and ...

An image ultraviolet, visible light, or near infrared is projected onto the transparent window of the vacuum tube as shown in Fig. 1. The vacuum side of this window carries a sensitive layer called the photocathode. Light radiation causes the emission of electrons from the photocathode into the vacuum which are then accelerated by an applied DC voltage towards a luminescent screen (phosphor scr...

Abstract To achieve high color rendering and proper temperature, a red converter is essential for phosphor-converted white lighting devices. CaAlSiN3:Eu2+ (CASN) highly suitable phosphor light-emitting diodes. However, it can be hardly used in high-power laser due to poor thermal/chemical performance of the phosphor/silicone resin mixture. A series all-inorganic CASN-based phosphors (e.g., comp...

<p>The goal of this study is to discover a new method that uses standard phosphors and quantum dots improve the lighting qualities heat manipulation white light-emitting diodes (WLEDs). Despite popularity as good ingredient offers color rendering properties, (QDs) have not been widely employed in fabrication WLEDs, particularly, utilization QDs-phosphor-mixed nanocomposite limited. We pro...

Alternating current thin-film electroluminescent (ACTFEL) devices already occupy a segment of the largearea, high-resolution, flat-panel-display market. The AC-TFEL displays, which consist of a phosphor layer, such as manganese doped-zinc sulfide (ZnS:Mn), vertically sandwiched between two insulators that are contacted by electrodes, are robust, possess long lifetimes, and offer high luminance ...

Highly efficient red-emitting nitridosilicate phosphors Sr2Si5N8:Eu and Ba1.5Sr0.5Si5N8:Eu (doping level 1 %) applicable to phosphor converted pc-LEDs were synthesized in nanocrystalline form at low temperatures employing a novel single-source precursor approach. Synthesis starts from nanocrystalline silicon and uses mixed metal amides M(NH2)2 with M ) Sr, Ba, Eu as reactive intermediates. In a...