The net movement of water through a semi permeable membrane and its dependency upon the concentration of solutes in a solution. Abstract: Osmosis is a process by which water molecules travel between a semi permeable membrane in order to equalize solute concentration on both sides of the membrane. This experiment was performed in order to show how the concentration and tonicity of the solute/ solution combination affects the net water movement between the cell and its environment. The results obtained
lab experiment was to measure how the rate of osmosis can be effected by different kind of concentration gradients. It is determined that the rate of diffusion is effected by how strong the concentration gradient is. This was determined this by taking five dialysis bags and filling each with different concentration of fructose solution. Each bag was then placed into a beaker. Four of the beakers were filled with just tap while but the last one consumed 40% sucrose solution. Each bag weighted at a certain
Osmosis is the net movement of water from an area of high concentration to an area of low concentration. The process was first studied in 1877 by a German physiologist, Wilhelm Pfeffer. The general term osmose, now osmosis, was introduced in 1854 by a British chemist, Thomas Graham. (Britannica, n.d). This lab shows the rate of osmosis between three different concentrated cells and their outer environment. The dialysis tube mimicked the purpose of a cell membrane and the water in the beaker acted
BIOFUELS Two problems roused the world’s concern in recent years. One is energy crisis caused by the squandering of petroleum fuel. Second problem is environmental problems such as greenhouse effect, global warming, etc. To deal with such problems, renewable sources, utilization technology and bioenergy production technology have been developed. Bioethanol as one of the biofuel can be blended in different proportions in automobiles with gasoline. Biobutanol is also a new biofuel (Liu, Wang, & Zhang