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The geographical position of the USA, its climate, the major rivers, lakes, mountain rangers, some general information about the country.

T.G. Srinivasan would like to acknowledge with thanks The Department of Atomic Energy, India for the award of Raja Ramanna Fellowship.

REFERENCES

  1. M. Caude and D. Thiebaut, “Practical Supercritical Fluid Chromatography and Extraction,” Harwood Academic Publishers, Switzerland, 1999.
  2. M. A. Mc-Hugh and V. J. Krukonis, “Supercritical Fluid Extraction: Principle and Practice,” 2nd Edition, Butterworth-Heinamann, Boston, 1994.
  3. C. Erkey, “Supercritical Carbon Dioxide Extraction of Metals from Aqueous Solutions: A Review,” Journal of Supercritical Fluids, Vol. 17, No. 3, 2000, pp. 259-287. doi:10.1016/S0896-8446(99)00047-9
  4. K. E. Laintz, C. M. Wai, C. R. Yonker and R. D. Smith, “Extraction of Metal Ions from Liquid and Solid Materials by Supercritical Carbon Dioxide,” Analitical Chemistry, Vol. 64, No. 22, 1992, pp. 2875-2878. doi:10.1021/ac00046a039
  5. Y. Lin, N. G. Smart and C. M. Wai, “Supercritical Fluid Extraction and Chromatography of Metal Chelates and Organometallic Compounds,” Trend Analitical Chemistry, Vol. 14, No. 3, 1995, pp. 123-133. doi:10.1016/0165-9936(95)94045-G
  6. C .M. Wai, “Supercritical Fluid Extraction of Trace Metals from Solid and Liquid Materials for Analytical Applications,” Analitical Sciences, Vol. 11, No. 1, 1995, pp. 165-167. doi:10.2116/analsci.11.165
  7. Y. Lin, R. D. Brauer, K. E. Laintz and C. M. Wai, “Supercritical Fluid Extraction of Lanthanides and Actinides from Solid Materials with a Fluorinated β-Diketone,” Analitical Chemistry, Vol. 65, No. 18, 1993, pp. 2549- 2551. doi:10.1021/ac00066a027
  8. S. Iso, S. Uno, Y. Meguro, T. Sasaki and Z. Yoshida, “Pressure Dependence of Extraction Behaviour of Plutonium (IV) and Uranium (VI) from Nitric Acid Solution to Supercritical Carbon Dioxide Containing Tributylphosphate,” Progress in Nuclear Energy, Vol. 37, No. 1-4, 2000, pp. 423-428. doi:10.1016/S0149-1970(00)00082-2
  9. O. Tomioka, Y. Meguro, Y. Enokida, I. Yamamoto and Z. Yoshida, “Dissolution Behaviour of Uranium Oxides with Supercritical CO2 Using HNO3-TBP Complex as a Reactant,” Journal of Nuclear Science and Technology, Vol. 38, No. 12, 2001, pp. 1097-1102. doi:10.1080/18811248.2001.9715141
  10. Y. Meguro, S. Iso, Z. Yoshida, O. Tomioka, Y. Enokida and I. Yamamoto, “Decontamination of Uranium Oxides from Solid Wastes by Supercritical CO2 Fluid Leaching Method Using HNO3-TBP Complex as a Reactant,” Journal of Supercritical Fluids, Vol. 31, No. 2, 2004, pp. 141- 147. doi:10.1016/j.supflu.2003.10.005
  11. T. I. Trofimov, M. D. Samsonov, Y. M. Kulyako and B. F. Myasoedov, “Dissolution and Extraction of Actinide Oxides in Supercritical Carbon Dioxide Containing the Complex of Tri-n-Butylphosphate with Nitric Acid,” Comptes Rendus Chimie, Vol. 7, No. 12, 2004, pp. 1209-1213. doi:10.1016/j.crci.2004.04.010
  12. B. J. Mincher, R. V. Fox, R. G. G. Holmes, R. A. Robbins and C. Boardman, “Supercritical Fluid Extraction of Plutonium and Americium from Soil Using Theonytrifluoroacetone and Tributylphosphate Complexation,” Radiochimica Acta, Vol. 89, No. 10, 2001, pp. 613-617. doi:10.1524/ract.2001.89.10.613
  13. A. A. Murzin, V. A. Babain, A. Yu. Shadrin, V. A. Kamachev, V. N. Romanovskii, V. A. Starchenko, S. V. Podoinitsyn, Yu. A. Revenko, M. V. Logunov and N. G. Smart, “Deactivation in Sub and Supercritical Carbon Dioxide,” Radiochemistry, Vol. 44, No. 4, 2002, pp. 410- 415. doi:10.1023/A:1020641431291
  14. M. Shamsipur, A. R. Ghiasvand and Y. Yamini, “Extraction of Uranium from Solid Matrices Using Modified Supercritical Fluid CO2,” Journal of Supercritical Fluids, Vol. 20, No. 2, 2001, pp. 163-169. doi:10.1016/S0896-8446(01)00052-3
  15. Y. Lin, C. M. Wai, F. M. Jean and R. D. Brauer, “Supercritical Fluid Extraction of Thorium and Uranium Ions from Solid and Liquid Materials with Fluorinated betaDiketones and Tributyl Phosphate,” Environmental Science and Technology, Vol. 28, No. 6, 1994, pp. 1190- 1193. doi:10.1021/es00055a034
  16. P. Kumar, A. Pal, M. K. Saxena and K. L. Ramakumar, “Supercritical Fluid Extraction of Uranium and Thorium from Solid Matrices,” Desalination, Vol. 232, No. 1-3, 2008, pp. 71-79. doi:10.1016/j.desal.2007.08.022
  17. A. Rao, P. Kumar and K. L. Ramakumar, “Separation of Uranium from Different Uranium Oxide Matrices Employing Supercritical Carbon Dioxide Extraction,” Journal of Radioanalytical Nuclear Chemistry, Vol. 285, No. 2, 2010, pp. 247-257. doi:10.1007/s10967-010-0568-7
  18. R. Kumar, N. Sivaraman, E. Senthil Vadivu, T. G. Srinivasan and P. R. Vasudeva Rao, “Complete Removal of Uranyl Nitrate from Tissue Matrix Using Supercritical Fluid Extraction,” Radiochimica Acta, Vol. 91, No. 4, 2003, pp. 197-201. doi:10.1524/ract.91.4.197.19966
  19. R. Kumar, N. Sivaraman, K. Sujatha, T. G. Srinivasan and P. R. Vasudeva Rao, “Removal of Plutonium and Americium from Waste Matrices by Supercritical Carbon Dioxide Extraction,” Radiochimica Acta, Vol. 95, No. 10, 2007, pp. 577-584. doi:10.1524/ract.2007.95.10.577
  20. V. Suresh Kumar, R. Kumar, N. Sivaraman, G. Ravisankar and P. R. Vasudeva Rao, “Design and Adaptation of a Novel Supercritical Extraction Facility for Operation in a Glove Box for Recovery of Radioactive Elements,” Review of Scientific Instruments, Vol. 81, No. 9, 2010, Article ID: 094101. doi:10.1063/1.3484190
  21. A. Datta, N. Sivaraman, T. G. Srinivasan and P. R. Vasudeva Rao, “Liquid Chromatographic Behaviour of Actinides and Lanthanides on Monolith Supports,” Radiochimica Acta, Vol. 99, No. 5, 2011, pp. 275-283.
  22. R. Kumar, N. Sivaraman, K. Sujatha, T. G. Srinivasan and P. R. Vasudeva Rao, “A Novel Technique for Modifier Free Delivery of Ligands for Supercritical Fluid Extraction,” Radiochimica Acta, Vol. 97, No. 8, 2009, pp. 443-451. doi:10.1524/ract.2009.1633

 



The geographical position of the USA, its climate, the major rivers, lakes, mountain rangers, some general information about the country.

The USA is situated in the central part of the North American continent and borders with Canada in the north and Mexico in the south. It's washed by the Atlantic ocean in the west. The USA covers the territory of over 9 million square km. The USA is the 4th largest country in the world after Russia, Canada and China. It runs 3d in population after China and India. Population is 280 562 489. The main feature of the USA population is ethnic diversity. The USA originated with the declaration of independence comprises 50 states and the District of Columbia and Puerto Rico and Virgin islands. The main landmass includes 48 states .Two separate states of Hawaii in the Pacific ocean and Alaska which occupies the north western part of North American continent.

The capital of the USA is Washington, which is in the district of Columbia. The official language is English. National anthem-the star -spangled Banner .National flag -the old glory. 50 white stars represent 50states of the USA.13stripes*red and white denote the original 13states.The red colour symbolizes courage. The white colour –purity .The blue -justice and firmness .National moto *in god we trust. Bold headed eagle-national bird. National cartoon figure-uncle Sam.

The main geographical areas of the USA the atlantic lowland to the east of Appalachians the central plains between the Rocky mountains in the west and Appalachians in the east .the narrow pacific lowlands of the west coast .the southern part of the great lakes in the central USA the great plateau most of which is desert between the Rockies and Sierra Nevada .The main mountains*the Appalachians ,the Rocky mountains ,Sierra Nevada ,the Cascades ,Coast Rangers.

The Rockies are a sort of natural border .All the rivers west of Rockies flow to the Pacific Ocean .All the ricers east of the Rockies flow to the Atlantic Ocean .The greatest rivers of the USA*the Colorado ,the Columbia flow into the Pacific ocean .The Mississipi runs from the west ,is the longest river ,called the father of waters .Has tributaries the Missouri river and the Ohio river ,flow into the Gulf of Mexico .The Hudson river ? .The rivers in the west are unsuitable for navigation as they are cut by deep rapids .They serve as a great source of electricity .World famous is the region of Great Lakes * Huron ,Ontario ,Erie ,Superior ,Michigan .The lakes are joined together by short rivers and canals and cut by rapids .The greatest of them is the Niagara Falls .In the west of the USA -the Great Salt Lake .The deepest lake is situated in Oregon ,called Crater lake.

Climate There're different climatic zones of the territory of the USA.On the whole the climate is continental .Alaska lies in sub-arktic and arktic zones .The southern part of Florida and Hawaii are situated in the tropical zones .

Large reserves of coal ,oil, gas ,iron ,ferrous and non-ferrous metals form a solid base for the development of the USA industry.

The american states * 1 New England states –Maine ,Vermont, New Hampshire ,Massachusetts ,Rhode Island, Connecticut. 2Middle Atlantic states -New Jork ,New Jersey ,Pennsylvania ,Maryland, Delaware ,District of Columbia .3 the South – Virginia ,West Virginia ,Kentucky ,North +South Carolina ,Georgia, Florida ,Alabama ,Tennessee , Mississippi .4South Central states -Arkansas,Louisiana,Oklahoma,,Texas.5 the Mid Western states –Ohio ,Indiana ,Illinois ,Michigan ,Wisconsin.6 the Plains states –Iowa ,Kansas ,Minnesota ,North +South Dakota, Nebraska, Missouri .7 the Mountain states –Arizona ,Colorado ,Idaho ,Montana ,Nevada ,New Mexico,Utah,Wyoming.8 the Pacific states –California ,Oregon ,Washington. 9 Alaska +Hawaii. Each state has an elected government and state legislature to make the states laws with state courts to enforce them .Every state has its own official name ,flag ,song, animal, bird, moto. There is at least 1 university in each state.


Date: 2015-01-02; view: 1993


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