The movement of a solvent through a membrane separating two solutions of different concentrations. The solvent from the side of weaker concentration usually moves to the side of the stronger concentration, diluting it, until the concentrations of the solutions are equal on both sides of the membrane.
We manage Trafalgar Square, one of Londonâs most vibrant spaces in the middle of the city. Find out about the history of this heritage site, its statues and its fountains.
Home / Destinations / Beijing / Attractions / Tiananmen Square. Located at the center of Beijing City and the midpoint of Chang'an Avenue is the remarkable Tiananmen Square, where you can visit the Tiananmen Tower, Monument to the People's Heroes, Great Hall of the People, Chairman Mao Zedong Memorial Hall and see the national flag raising ceremony. Thousands of people come to the Square every day. It is the must place to visit in Beijing City. Tiananmen Tower. At the north end of the Square is Tiananmen Tower. Initially built in 1417 during the Ming Dynasty (1368 A.D.- 1644 A.D.), the Square was the front door of the Forbidden City.