Loading...

Effect of Low Power CW Laser (He-Ne)on Artemia Cyst

Hojjati Vayghan, Reza | 2012

2235 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42677 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Sadighi Bonabi, Rasoul
  7. Abstract:
  8. Artemia (brine shrimp) is a genus of crustaceans that lives in saltwater and due to having unique features, in producing the food and nutrients needed for larvae and other types of farmed sea creatures, is of great importance. In its natural environment under certain conditions, Artemia produces cysts that float at the water surface and are driven ashore by wind and waves. These cysts are inactive and do not develop further as long as they are kept dry. Upon immersion in seawater, the biconcave cysts hydrate and become spherical and, within the shell, the embryo resumes its interrupted metabolism. After about 20 h the outer membrane of the cyst breaking and the embryo appears, surrounded by the hatching membrane while the embryo hangs underneath the empty shell (the ‘umbrella’ stage) the development of the nauplius is completed and within a short period the hatching membrane is hatching, giving rise to the free-swimming nauplius. [1] Lifespan, Hatching rate, length growth and color in a living creature are examples of important and considerable factors to be studied. The studies on artemia show this creature tends to places with a lot of sun light so through this feature solar ponds are built which focus the sun light in one place and raise hatching rate in artemia. [2] This effect (the increase in hatching rate) can be due to the changes which electromagnetic field has had on this creature, [3] since magnetic fields induce changes in the shape and the surface of the cells. [4] In this research, the artemia cysts are exposed to laser in order to study its effects on main factors (like lifespan and hatching rate) after incubation. The laser used here is low power CW laser (He-Ne) and the purpose is to find an appropriate laser characteristic (duration and power) so that laser-artemia's cyst's tissues interaction induce positive effects. [5]
  9. Keywords:
  10. Electromagnetic Fields ; Urmiana Artemia Cyst ; Hatching Percentage (H%) ; Low Power CW Laser

 Digital Object List

 Bookmark

...see more