Ongoing discussion for students in Chemistry III

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Monday, October 31, 2011

BioLuminescence

Bioluminescence is light that is created by living creatures such as bugs, fish, bacteria, etc... Bioluminescence is known as cold light because it does not require or generate any energy as result. A pigment known as luciferin will react with oxygen to produce light inside or outside a cell with the enzyme luciferase speeding up these reactions. Luciferin and luciferase are just the type of enzyme and pigments used in animals which use bioluminescence. This pigment and enzyme are needed in order for the reaction to occur for light to be produced that is why not all animals and organisms cannot produce light. Bioluminescence is used for camouflage, attraction, and communication. If there was a bug which emmited light and heat as a result of its bioluminescence, it would mean that the bug is not an efficient bug. With Bioluminescence there is little heat produced, which is what makes it so efficient as opposed to incandescent lights. If a bug was producing enough heat to burn skin (<140 degrees) means that the bug is producing more heat than light making it an ineffective form of bioluninecence. Combustion though is a series of exothermic reactions with the production of heat and if the bug continued to produce more heat than the bug is able to handle it will combust. Given that skin burns at around 140 degrees Fahrenheit and at most 20 % of the energy is produced as a heat byproduct. If the bug was producing that much heat it would not combust unless the temperature was above boiling point. Water has a boiling point of 212 degrees farenheit and given that bugs are made of molecules other than water the boiling point would be actually more than 212 and so the bug would not combust until the amount of heat released would be more than the boiling point and much higher then it would be able to reach.

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