Page 1 of 2

Science Investigatory Project

Continues for 1 more pages »
Read full document

Science Investigatory Project

  • By
  • August 2011
  • 430 Words
Page 1 of 2
Chapter II: Review of Related Literature
1.Conceptual Research
It is said that Lemon Grass is an excellent insect repellant. The ancients were familiar with this attribute. This action, bug repelling, does not carry the same punch that it did in the days of the Israelites. Egypt was fertile because it had good soil and lots of water. An abundance of water meant lots of insects, specifically mosquitoes. Mosquitoes carry malaria, which was bad news in the ancient world. The ancients burned lemon grass to keep the bugs away just as we do. However, they were worried about a little more than unsightly bump on the legs. Keeping bugs away was a life or death situation. Using coconut oil for the skin is healthy, the natural way. Tropical dwellers have known this fact for at least a millennium or two. Unlike superficial cosmetics formulated in labs of profit-hungry corporations, coconut oil contains absolutely nothing that will harm your precious skin, including the rest of your body. 2.Related/Previous Studies

Synthetic repellents tend to be more effective and/or longer lasting than "natural" repellents. In comparative studies, IR3535 was as effective or better than DEET in protection against mosquitoes. However, some plant-based repellents may provide effective relief as well. Essential oil repellents can be short-lived in their effectiveness, since essential oils can evaporate completely. A test of various insect repellents by an independent consumer organization found that repellents containing DEET or picaridin are more effective than repellents with "natural" active ingredients. All the synthetics gave almost 100% repellency for the first 2 hours, where the natural repellent products were most effective for the first 30 to 60 minutes, and required reapplication to be effective over several hours. For protection against mosquitos, the U.S. Centers for Disease Control issued a statement in May 2008 recommending equally DEET, picaridin, oil of lemon eucalyptus...

Rate this document

What do you think about the quality of this document?

Share this document

Let your classmates know about this document and more at