Thursday, November 30, 2006

Reverse Osmosis


Common use for Reverse osmosis is in purifying water where it produces water, which is in demand at all, places. One of the finest filtration under Reverse Osmosis is Hyper Filtration, where the removals of particles are as small as ions. In this Process, water gets purified and the various salts and other impurities are removed to improve the Properties of fluid, its taste as well as color.

Reverse osmosis occurs when the water is moved across the membrane against the concentration gradient, from lower concentration to higher concentration. It thus purifies water by ejecting out fluids, inorganic chemicals such as nitrates, calcium, and magnesium, other ions and contaminants.

It uses a semi-permeable membrane, allowing the fluid that is being purified to pass through it. Most of the reverse osmosis technology procedures undergoes a cross flow Process to allow the membrane to clean itself periodically. As some of the fluid gets rested in downstream, continuous cross-flow process helps or sweeps out the rejected species away from the membrane.

Wednesday, November 22, 2006

The Mausoleum at Halicarnassus


Similar to the Great Pyramid, we are now visiting the burial place of an ancient king. Yet the Mausoleum is different - so different from the Pyramid that it earned its reputation - and a spot within the list - for other reasons. Geographically, it is closer to the Temple of Artemis... And it was the beauty of the tomb rather than its size that fascinated its visitors for years. In the city of Bodrum on the Aegean Sea, in south-west Turkey.

When the Persians expanded their ancient kingdom to include Mesopotamia, Northern India, Syria, Egypt, and Asia Minor, the king could not control his vast empire without the help of local governors or rulers -- the Satraps. Like many other provinces, the kingdom of Caria in the western part of Asia Minor (Turkey) was so far from the Persian capital that it was practically autonomous. From 377 to 353 BC, king Mausollos of Caria reigned and moved his capital to Halicarnassus. Nothing is exciting about Maussollos life except the construction of his tomb. The project was conceived by his wife and sister Artemisia, and the construction might have started during the king's lifetime. The Mausoleum was completed around 350 BC, three years after Maussollos death, and one year after Artemisia's.