Scientifics - April 2013
Diamond-Hard Polish: Shiny Shimmering Smoothness
Diamonds are a symbol of perfection. They are stunning, transparent gemstones. At its core, a diamond is, in essence, carbon. The carbon atoms are arranged in a rigid tetrahedral structure. The more common form of carbon, graphite, has a hexagonal structure and is actually slightly more stable than diamond.
Turnover a Lake
Freshwater lakes are unique, mainly self-sustained ecosystems. Dissolved oxygen is essential for all the creatures that live in the lake. There are two sources of dissolved oxygen. Plankton and other organisms can perform photosynthesis, provided that there is sunlight. Oxygen can also diffuse in from the atmosphere. The larger the lake, the more surface area available for the diffusion of oxygen.