Synthesis and characterization of nanocrystalline gallium nitride by nitridation of Ga-EDTA complex
摘要:
Gallium nitride (GaN) nanocrystals were synthesized by nitridation of Ga-EDTA (ethylene diamine tetra acetic acid) complexes at different temperatures starting from 600 to 900 degrees C. X-ray diffraction analysis, Fourier transform infrared spectroscopy and Raman studies revealed that the compound synthesized at 900 degrees C consists of single-phase GaN nanocrystals with wurtzite structure. The change in morphology of the GaN crystals at different temperatures was observed using scanning electron microscopy. The transmission electron microscopy showed the average size of the crystalline particles to be similar to 20 nm. The room temperature photoluminescence exhibits band-edge emission of GaN at 3.46 eV for all the samples. The present study demonstrates that the nitridation of Ca-EDTA complex method has significant potential for the synthesis of GaN nanocrystals as a simple and inexpensive method. (C) 2010 Published by Elsevier B.V.
[EN] ANTIBACTERIAL MICROELEMENT CHELATES AND THE USE THEREOF IN ANIMAL FEEDS<br/>[FR] CHÉLATES DE MICROÉLÉMENTS ANTIBACTÉRIENS ET UTILISATION ASSOCIÉE DANS DES NOURRITURES ANIMALES
申请人:BATA ZRT DR
公开号:WO2014001924A1
公开(公告)日:2014-01-03
The present invention relates to a microelement organic O-chelate or N-chelate complex compound, for the inhibition of facultative pathogenic bacteria. The present invention further relates to a composition, feed additive or feed comprising the compounds, as well as methods for the preparation thereof, and for the use thereof in animal stock farming.
There is described a process for removing metal salts from a chelating agent (e.g. EDTA) by esterification to produce a solid metal salt and an ester of the chelating agent and by thereafter separating the solid metal salt from the reaction mixture.
An external skin treatment composition containing (I) vitamin A (retinol) and (II) as a stabilizer, an oil, polyethylene (propylene) glycol, a hydroxy carboxylate, a neutral amino acid salt, an oil-soluble antioxidant/EDTA/a benzophenone compound, an oil-soluble antioxidant/an acid/a benzophenone compound, an inclusion compound of cyclodextrin including an antioxidant and/or an ultraviolet absorber, butanediol and/or an oil-soluble antioxidant, a water-soluble benzophenone compound, a basic amino acid and the salt thereof, an acidic amino acid and the salt thereof, a polar oil, a water-swellable clay mineral.
The invention relates to an external skin treatment composition comprising (I) vitamin A selected from the group consisting of retinol, all-trans type retinol and 13-cis type retinol, and (II) at least one stabilizer selected from the group consisting of polyethyleneglycols (PEG) and polypropyleneglycols (PPG).
Autonomous surface cleaning robot for wet and dry cleaning
申请人:iRobot Corporation
公开号:EP2145573A1
公开(公告)日:2010-01-20
An autonomous floor cleaning robot (100) includes a transport drive and control system arranged for autonomous movement of the robot over a floor for performing cleaning operations. The robot chassis carries a first cleaning zone (A) comprising cleaning elements (600) arranged to suction loose particulates up from the cleaning surface and a second cleaning zone (B) comprising cleaning elements (700) arraigned to apply a cleaning fluid onto the surface and to thereafter collect the cleaning fluid up from the surface after it has been used to clean the surface. The robot chassis (200) carries a supply of cleaning fluid and a waste container (D) for storing waste materials collected up from the cleaning surface.