نتایج جستجو برای: aluminium

تعداد نتایج: 14927  

2009
O. A. Ileperuma H. A. Dharmagunawardhane K. P. R. P Herath

*Corresponding author ([email protected]) Abstract: Chronic renal failure of an endemic nature and unknown aetiology affects people in the North-Central Province of Sri Lanka. People affected, consume fluoride rich water and almost exclusively use sub-standard aluminium pots for cooking and storing water. Leaching of aluminium under different fluoride stress and under the acidic conditions used...

2016
A. Ahmad M. A. Lajis N. K. Yusuf

Aluminium is totally recyclable with no downgrading of its qualities, but in the process of typical conventional aluminium recycling, there are quite a number of negative impacts. The recycling of aluminium and its alloys by direct recycling method is relatively simple, consumes small amount of energy, produce small amount of waste and does not have a harmful effect on the environment. This app...

2002
Figen KADIRGAN

Solar thermal collectors represent a widely used type of system for the conversion of solar energy. In order to produce selective coatings on aluminium substrates to be used as absorber plates in high efficiency solar collectors, nickel pigmentation was applied to anodically oxidised surfaces. Electrochemical dc methods are used to study the oxidation of aluminium as functions of the following ...

Journal: :Medical hypotheses 2009
Christopher Exley Louise Swarbrick Rhomain K Gherardi Francois-Jérôme Authier

Macrophagic myofasciitis and chronic fatigue syndrome are severely disabling conditions which may be caused by adverse reactions to aluminium-containing adjuvants in vaccines. While a little is known of disease aetiology both conditions are characterised by an aberrant immune response, have a number of prominent symptoms in common and are coincident in many individuals. Herein, we have describe...

2015
Peter Michal Alena Vagaská Miroslav Gombár Ján Kmec Emil Spišák Daniel Kučerka

This paper shows an influence of chemical composition of used electrolyte, such as amount of sulphuric acid in electrolyte, amount of aluminium cations in electrolyte and amount of oxalic acid in electrolyte, and operating parameters of process of anodic oxidation of aluminium such as the temperature of electrolyte, anodizing time, and voltage applied during anodizing process. The paper shows t...

2014
A. Slaninova J. Machova Z. Svobodova

Contamination of Pansky Pond, in March 2013, with 119 mg/l aluminium, and 87 mg/l iron by acidic (pH 3.17) inflow from a nearby quarry caused fish die-off, while exhibiting symptoms of suffocation. Transformation of soluble forms of aluminium and iron into insoluble forms occurred on fish gill where the content of aluminium and iron was 100-fold and 12-fold, respectively, that found in control ...

2002
J. VAN S. GRAVER

Recommended methods for disposal of aluminium phosphide may involve burial. A range of aluminium phosphide preparations used for fumigation consisting of partially spent, and unspent commercial phosphine (PH3) generating aluminium phosphide formulations (blankets and sachets, pellets, and tablets), was buried for 19 months. Phosphine produced by the formulations during this period was monitored...

2017
Houshang Alamdari Hugo F. Lopez

Aluminium, with more than 50 Mt annual production in 2016, is an essential material in modern engineering designs of lightweight structures. To obtain aluminium ingots from bauxite, three main processes are involved: the Bayer process to produce alumina from bauxite; the anode manufacturing process to produce electrodes, and the smelting process using the Hall-Héroult technology. The Hall-Hérou...

2014
CD Lewis JL Jacobs KF Smith R Behrendt

The benefits, costs and risk from introducing aluminium-tolerant lucerne (alfalfa) into a sheep grazing enterprise, consisting of a perennial ryegrass-based pasture, located in the high rainfall zone of Victoria, Australia, were estimated using a discounted cash flow analysis. Two ‘what if’ scenarios were compared for a modelled representative case study farm; 1) where aluminium toxicity occurr...

Journal: :Occupational and environmental medicine 1996
B Sjögren A Iregren W Frech M Hagman L Johansson M Tesarz A Wennberg

OBJECTIVES The purpose was to study the effects on the nervous system in welders exposed to aluminium and manganese. METHODS The investigation included questionnaires on symptoms, psychological methods (simple reaction time, finger tapping speed and endurance, digit span, vocabulary, tracking, symbol digit, cylinders, olfactory threshold, Luria-Nebraska motor scale), neurophysiological method...

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