منابع مشابه
Dust-free bleaching powder may not prevent symptoms in hairdressers with bleaching-associated rhinitis
OBJECTIVE Hairdressers have an increased risk for airway symptoms especially when using hair-bleaching powder containing persulfate. To minimize exposure, dust-free bleaching powder (DFP) has been made available. We studied the effects of regular powder (RP) or DFP on the airway symptoms of hairdressers with hair-bleaching associated rhinitis. METHODS Twelve hairdressers each performed three ...
متن کاملLOW TEMPERATURE MOLTEN SALT SYNTHESIS OF NANO CRYSTALLINE MgAl2O4 POWDER
Abstract: composition of MgO and nano boehmite. The reactant and potassium chloride, as the reaction media, were fired at800-1000 °C at different dwell times (0.5-5 h) in the ambient atmosphere. After washing and filtration, the spinel nanopowder was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) techniques. It was demonstrated tha...
متن کاملAZ31/HA-Zeolite Nano Crystalline Biocomposite Fabricated by Mechanical Alloying and Powder Metallurgy: Mechanical Properties
Magnesium and its alloys are light, biodegradable, biocompatible metals that have promising applications as biomaterials. Magnesium is potentially useful for orthopedic and cardiovascular applications. However, the corrosion rate of this metal is so high that its degradation occurs before the end of the healing process. One of the ways to improve the corrosion rate is to compose it’s with cer...
متن کاملAN INVESTIGATION ON REACTIVE SINTERING OF NANO-CRYSTALLINE TiO2 -Al POWDER PREPARED BY MECHANICAL ALLOYING
In this research an ultra-fine grained composite structure consisting of an intermetallic matrix together with dispersed nano-sized Al2O3 obtained via mechanical activation of TiO2 and Al in a high energy ball mill and sintering of consolidated samples. Phase composition and morphology of the milled and sintered samples were evaluated by XRD and SEM techniques Thermal behavior of the powder sa...
متن کاملSurvey of AZ31/HA-Zeolite Nano Crystalline Biocomposite with Powder Metallurgy (PM)
Magnesium is potentially useful for orthopedic and cardiovascular applications. Magnesium and its alloys are light, biodegradable, biocompatible metals that have promising applications as biomaterials. However, the corrosion rate of this metal is so high that its degradation occurs before the end of the healing process. One of the ways to improve the corrosion rate is to compose it with ceramic...
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ژورنال
عنوان ژورنال: J. Chem. Soc., Trans.
سال: 1909
ISSN: 0368-1645
DOI: 10.1039/ct9099500751