Thursday, September 23, 2010

THE CYTOPLASM

The Cytoplasm is the part of a cell that is enclosed within the cell membrane.

All the contents of the cells of prokaryote organisms (which lack a cell nucleus) are contained within the cytoplasm. Within the cells of eukaryote organisms the contents of the cell nucleus are separated from the cytoplasm, and are there called the nucleoplasm.

In eukaryotic cells also, the cytoplasm contains organelles, such as mitochondria, which are filled with liquid that is kept separate from the rest of the cytoplasm by biological membranes. It is within the cytoplasm that most cellular activities occur, such as many metabolic pathways including glycolysis, and processes such as cell division. The inner, granular mass is called the endoplasm and the outer, clear and glassy layer is called the cell cortex or the ectoplasm.

The part of the cytoplasm that is not held within organelles is called the cytosol. The cytosol is a complex mixture of cytoskeleton filaments, dissolved molecules, and water that fills much of the volume of a cell. The cytosol is a gel, with a network of fibers dispersed through water. Due to this network of pores and high concentrations of dissolved macromolecules, such as proteins, an effect called macromolecular crowding occurs and the cytosol does not act as an ideal solution. This crowding effect alters how the components of the cytosol interact with each other.

Sunday, September 19, 2010

The secret power of youtube.

The secret power of youtube :
Ideas worth spreading.

Everyone thinks or at least almost everyone that youtube is a website for teenagers idiocy, mindless narcisism, watching funny videos making fun of other people.
But not everyone knows that it has now becamed a new form of communicating people news, its called : crowd-accelerated innovation. Which means that like before people have been innovating new types of communication such as printing (books, newpapers, magazines) internet is now one of them, not just youtube. What is really impressing about this new type of communication is that is now allowing the rest of the worlds talents (not just news)to be shared digitally, Justin Bieber is one example. Online video is driving astonishing innovation in thousands of different fields from the ultra-niche to the sharing of truly world-changing ideas.

Questions :
Do you think youtube should be used only for entertainment ?
Can you think of other to come forms of communicating ?