[1] M. Horisberger, In Preparation of Biological Specimen for Scanning Elecetron Microscopy J.A. Murphy,G.M. Roomans, Eds. Scanning Electron Microscopy Inc. Chicago, IL, 1984; pp. 315- 336. 

[2] J. Roth, In Techniques in Immunocytochesmistry G.R. Bullock, P. Petrusz, Eds. Academic Press, London, 1983; Vol. 2, pp-216-284. 

[3] K. Kneipp, H. Kneipp, I. Itzkan, R.R. Dasari, M.S. Feld, Chem. Rev. 99 ( 1999 ) 2957. 

[4] C.L. Haynes, A.D. McFarland, R.P. VanDuyne, Anal. Chem. ( 2005 ) 338A. 

[5] H. Xu, E.J. Bjerneld, L. K¨ all, M. B¨ orjesson, Phys. Rev. Lett. 83 ( 1999 ) 4357. 

[6] E.S. Grabbe, R.P. Buck, J. Electroanal. Chem. 308 ( 1991 ) 227. 

[7] A.M. Ahern, R.L. Garrell, Langmuir 7 ( 1991 ) 254. 

[8] J. Hu, R.S. Sheng, Z.S. Xu, Y. Zeng, Spectrochim. Acta 51A ( 1995 ) 1087. 

[9] E. Podstawka, Y. Ozaki, L.M. Proniewicz, Appl. Spectrosc. 58 ( 2004 ) 1147. 

[10] G.D. Chumanov, R.G. Efremov, I.R. Nabiev, J. Raman Spectrosc. 21 ( 1990 ) 43. 

[11] A. Pellegrini, U. Thomas, N. Bramaz, S. Klauser, P. Hunziker, R. von Fellenberg, J. Appl. Microbi. 82 ( 1997 ) 372. 

[12] H.R. Ibrahim, T. Matsuzaki, T. Aoki, FEBS Lett. 506 ( 2001 ) 27. 

[13] A. Pellegrini, U. Thomas, P. Wild, E. Schraner, R. von Fellenberg, Microbiol. Res. 155(2) ( 2000 ) 69. 

[14] T. Croguennec, F. Nau, D. Molle, Y.L. Graet, G. Brule, Food Chem. 68 ( 2000 ) 29. 

[15] C.J. Sheng, H.D. Dian, Lysozyme, Shandong Science and Technology Press, 1982, pp. 50-51. 

[16] T. Imoto, L.S. Foster, J.A. Ruoley, F. Tanaka, Proc. Natl, Acad. Sci. USA 69 ( 1972 ) 1151. 

[17] G. Das, F. Mecarini, F. Gentile, F. D. Angelis, HG. M. Kumar, P. Candeloro, C. Liberale, G. Cuda, E. D. Fabrizio, Biosensors and Bioelectronics 24 ( 2009 ) 1693. 

[18] K.S. Ghosh, B.K. Sahoo and S. Dasgupta , Chemical Physics Letts. 452 ( 2008 ) 193. 

[19] Md. Imranul Hoq, K. Mitsuno, Y. Tsujino, T. Aoki, H.R. Ibrahim, International Journal of Biological Macromolecules 42 ( 2008 ) 468. 

[20] Jai Prakash, A.M. van Loenen-Weemaes, M. Haas, J.H. Proost, D.K.F. Meijer, F. Moolenaar, 

