Atomic / Ezine
Side effects of a non-peroxide-based home bleaching agent on dental enamel
Date: Jan 5, 2009
Author:
Changes in the chemistry and structure of enamel due to a commercial non-peroxide-based home bleaching product were studied in vitro using several techniques including electron probe microanalysis, flame atomic absorption spectroscopy and total reflection X-ray fluorescence.
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Batteries are included
Date: Dec 15, 2008
Author: David Bradley
Atomic absorption spectroscopy reveals the chemical cocktail of gaseous emissions produced by the incineration of spent alkaline batteries.
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Total and extractable heavy metals in indoor, outdoor and street dust from Aswan City, Egypt
Date: Dec 1, 2008
Author:
The level of heavy metal contamination in indoor room dust is evaluated and its relationship to the external environment examined. Samples of outdoor fallen dust, indoor room dust and street dust were collected from two different environmental locations in Aswan city, Egypt.
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Recycled oil
Date: Nov 15, 2008
Author: David Bradley
Recycled engine oil has high levels of organic impurities, heavy metals, and carcinogenic compounds, according to work carried out by researchers in Jordan. They have used atomic absorption (AA), inductive couple plasma (ICP) and Fourier transform infrared (FTIR) analyses to spot the differences between virgin and recycled engine oil.
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Leaves of orange jasmine (Murraya paniculata) as indicators of airborne heavy metal in Bangkok, Thailand
Date: Nov 3, 2008
Author:
Orange jasmine leaves were collected from three different sites in the area of Bangkok and the concentrations of Cu, Fe, Pb, Mn, Ni, Cr, and Zn were quantified by ICP-AES. All three Bangkok sites were polluted with heavy metals compared with a background site.
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Glowing Nobel Prize
Date: Oct 15, 2008
Author: David Bradley
The Nobel Prize for Chemistry this year went to three scientists for the discovery and development of the glowing jellyfish protein green fluorescent protein (GFP). GFP underpins much of modern biochemistry specifically because of its power as an absorption and emission marker that lights up the behaviour of biological molecules.
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The trading of ancient glass beads: new analytical data from South Asian and East African soda-alumina glass beads
Date: Oct 6, 2008
Author:
Laser ablation-inductively coupled plasma-mass spectrometry has been used to study of a group of archaeological glass beads with a specific alumina-rich composition from East Africa, India and Sri Lanka.
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Diamond approach to artificial atoms
Date: Sep 15, 2008
Author: David Bradley
A new spectroscopic approach to measuring the energy levels of an atomic system has been developed by US researchers. Amplitude spectroscopy can be used to measure the energies of an artificial atom, by scanning the amplitude of the radiation from the system and so overcomes one of the main barriers remaining before powerful quantum computers can be realised.
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Mangrove trees growing in a very saline condition but not using seawater
Date: Sep 1, 2008
Author:
ICP-AES, stable isotope ratio mass spectrometry and HPLC have been used to distinguish the types of water (seawater or freshwater) in neighbouring locations in French Guiana where magrove trees flourish.
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Running with KITA
Date: Aug 15, 2008
Author: David Bradley
A new clue about the folding of proteins comes from studies with a novel technique known as kinetic terahertz absorption spectroscopy (KITA). Results have now been compared for the first time with X-ray diffraction (SAXS) results, and fluorescence and circular dichroism spectra to reveal how protein folding takes place in two stages on different timescales.
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