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Home > All Images > 2003 > August > 15 Aug 2003

Images Dated 15th August 2003

Choose from 48 pictures in our Images Dated 15th August 2003 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Aquamarine crystal Featured 15 Aug 2003 Print

Aquamarine crystal

Aquamarine crystal. Aquamarine is a transparent blue or blue-green variety of beryl (beryllium aluminium silicate). The colour is due to trace amounts of iron within the crystal structure. Beryl occurs in many colours; green beryl is termed emerald. The rare, transparent beryl varieties are used as gemstones, while the more common types form the principal ore of the metal beryllium, which is widely used in industrial alloys. The main producer of aquamarines is Brazil. They are also found in Pakistan and the USA


Miniature thermal conductivity detector Featured 15 Aug 2003 Print

Miniature thermal conductivity detector

Miniature thermal conductivity detector. Coloured scanning electron micrograph of a detector that can be used to measure thermal conductivity of gases. It contains a gold wire (upper left to lower right) that is 200 times thinner than a human hair. When a reaction occurs between gases the change in composition results in a change in the temperature and consequently resistance of the wire. This triggers a signal that the reaction has occurred. Such detectors will be incorporated into microreactors to produce small amounts of chemicals. This detector was designed by the German technology company Siemens. Magnification: x670 when printed at 10 centimetres wide


Coronavirus Featured 15 Aug 2003 Print


Coronavirus. This type of virus is thought tobe responsible for the fatal outbreak of SARS(severe acute respiratory syndrome) in early 2003.Related coronaviruses cause the common cold andsome forms of gastroenteritis. They take theirname from their crown (corona) of surface proteins(red). These are made ofs glycoprotein, achemical that binds to cells in the virus's host, allowing it to enter them. The virus is coated ina membrane (green) that it derives from the cellsthat it invades. Inside this is the core, anicosahedral protein capsid (purple) thatencloses the RNA genetic material (yellow). SARSoriginated in China in late 2002

© Russell Kightley/Science Photo Library