Article - 16 Aug 2003
Sapphires are well known gem stones. The stages in their processing, such as grading, heat treatment and marketing are discussed. Characteristics and colours are also mentioned.
Article - 21 Jan 2002
A comprehensive overview of tungsten including history, occurrence, deposits, supply, mining and benficiation, prising, processing, recycling, toxicity and applications.
Article - 26 Oct 2001
Vinyl has many uses in cars and is used for several reasons. Some include cost advantages, environmental reasons and recyclability. Some applications include body mouldings, under bonnet wiring,...
Article - 5 Jun 2001
Paper, natural fibres, glass, metals and many plastics are used as packaging materials. The reasons for their use and developments in the packaging industry are explained.
Article - 8 Nov 2013
For more than thirty years or so, heavy metals have been considered as potential toxic environmental contaminants.
Article - 4 Sep 2013
Alloy 690 is a high-chromium nickel alloy that exhibits excellent resistance to many corrosive aqueous media and high temperature environments. It has good fabrication characteristics, metallurgical...
Article - 9 Apr 2013
Arsenic trisulfide is an inorganic compound with the chemical formula As2S3. It occurs in a bright yellow mineral named as orpiment and a red-orange mineral called as realgar.
Article - 10 Jan 2010
The nuclear industry is at the eye of a perfect storm with fuel oil and natural gas prices near record highs, worldwide energy demands increasing at an alarming rate, and increased concerns about...
Article - 31 Oct 2001
PVC is the most widely used material for water delivery, sprinkler systems and sewage transport due to its reliablity and durability.
Article - 22 Sep 2005
Much effort and funding by the government and private sectors are being allocated towards making Malaysia as a centre of education in South East Asia region. The various universities and colleges in...