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Stoyan Stoytchev

Position:Associate Professor, PhD

Department: Biomechanics

Room number: 312

Phone: +359 2 979 6448

E-mail: stoyan@imbm.bas.bg

Scientific degrees, institution, year:

 

 

MS, Sanкt Petersburg State University, Sanкt Petersburg, Russia, Faculty of Physics, Theoretical Physics, 1970

Assistant Professor, BAS, Central Laboratory of Biomechanics, 1973

PhD, BAS, Institute of Mechanics and Biomechanics, 1979

Associate Professor, BAS, Institute of Mechanics and Biomechanics, 1984

Fields of Research:

 

mechanics, biomechanics, experimental methods, modeling of biological tissues and processes, biofilm, modeling of bioprocess systems

Extended Information

Recent Publications:

1. Nikolov L., V. Mamatarkova, S. Slavchev, S. Stoytchev. The convergence of biotechnology and nanotechnology as an accelerator of the development of biofilm technologies. Ecological Engineering and Environment Protection, vol. 7, No. 1, 36-47 (2008).

2. Hadjikov L., Kirilova M., Stoytchev S., Pashkouleva D., Visco-elastic mechanical behavior of human abdominal fascia, Series on Biomechanics, vol. 23, No. 1, pp. 43-51 (2007).

3. Mladenov Kl., Petrova E., Mamatarkova V., Nikolov L., Stoytchev S., System analysis of homogenius - heterogenius mechanisms in biofilm reactor. Proceedings of the Thirty Sixth Spring Conference of the Union of Bulgarian Mathematicians, St. Konstantin & Elena resort, Varna, April 2-6, 2007, pp. 263-268.

4. R. A. Turusov, S. Stoytchev, L. Hadjikov, V.I. Egorov. Modeling of human intestine mechanical properties and anastomosis stresses. Journal of Biomechanics, Volume 39, Supplement 1, 2006, p. 422.

5. M. Kirilova, S. Stoytchev, D. Pashkouleva, V. Kavardzhikov, R. Radev. Evaluation of mechanical properties of synthetic hernia meshes. Journal of Biomechanics, Volume 39, Supplement 1, 2006, p. 263.

6. L. Nikolov, E. Petrova, V. Mamatarkova, S. Stoytchev. Study of forming and functioning of biofilm by means of mathematical model. Ecological engineering and environment protection (Sofia), 2006, v. 2, pp. 46-52.

7. M. Kirilova, S. Stoytchev, D. Pashkouleva, V. Kavardzhikov, V. Tsenova. Mechanical properties of human fascia transversalis, 2006, Доклади на БАН, т.59, No7, стр.731-736.

8. S. Nikolov, St. Stoytchev. B. Bozhkov. Mathematical model of blood flow pulsations in the circle of Willis. Доклади на БАН, т. 59, № 8, 2006, стр. 811-820.

9. S. Stoytchev, L. Hadjikov, V.I. Egorov, A.O. Baranov, R.A. Turusov, I.V. Schastlivtsev. Pasive visco-elastic mechanical properties of small human intestine. Comparative study with other soft tissues. Journal of Theoretical and Applied Mechanics, Sofia, 2006, vol. 36, No. 4, pp. 55-70.

10. M. Kirilova, S. Stoytchev, D. Pashkouleva, V. Kavardzhikov. Mechanical properties of hernia meshes. Journal of Theoretical and Applied Mechanics, Sofia, 2006, vol. 36, No. 3, pp. 87-96

11. Svetoslav Nikolov and Stoyan Stoytchev. A mathematical model of blood flow in an intracranial aneurysm. Analytical and numerical study. Journal of Mechanics in Medicine and Biology, (2006), v. 6, #2, 137-151

12. Hadjikov L., Stoytchev S., Alexandrova D., Egorov V., Baranov A., Schastlivtsev I., Turusov R. Non-linear mechanical model of small human intestine at stress relaxation experiments, In: Proc. 10-th Jubilee Nat. Congress on Theor. Appl. Mechanics, 13-16 Sept. 2005, Varna, Bulgaria, volume 2, pp. 124- 127.

13. Kirilova M., Stoytchev S., Pashkouleva D., Kavardzhikov V., Radev R., Bonev S. An experimental investigation of human fascia transversalis and synthetic hernial meshes. In: Proceedings of 10-th Jubilee National Congress on Theoretical and Applied Mechanics, Varna, 13-16.09, 2005, v. 2, pp. 139-144.

14. Nikolov L., Mamatarkova V., Petrova E., Stoytchev St. Modeling of base phenomena in bioprocess systems with spontaneously fixed biomass. In: Proc. of 10-th Jubilee National Congress on Theoretical and Applied Mechanics, Varna, 13-16.09.2005, volume 1, pp. 543-547.

15. S. Nikolov, St. Stoytchev. Analysis of blood flow in the circle of Willis. In: Proceedings of 10-th Jubilee National Congress on Theoretical and Applied Mechanics, Varna, 13-16.09, 2005, v. 2, pp. 163-169.

16. Svetoslav Nikolov, Stoyan Stoytchev, Juan J. Nieto, Angela Torres. Mathematical modeling and analysis of blood flow in an intracranial aneurysm. Neurological Research, v. 25 (2003), pp. 479-504

17. Stoytchev, S, V.I. Egorov, A.O. Baranov, I. V. Schastlivtsev, L. Hadjikov, and R. A. Turusov.. Visco-elastic Mechanical Behavior of the Small Human Intestine. In: Proceedings of EuroSummer School on Biorheology, Varna, 28-30 June, 2003, pp. 86-89.

18. Stoytchev, S., G. Pallotti and P. Pettazzoni. Method for presurgical determination of the optimal arterial bypass diameter. In: Proceedings of 2. European Medical & Biological Engineering Conference, December 04-08, 2002, Vienna, Austria, Part 2, pp. 1028-1029.

19. S. Stoytchev, RA Turusov, VI Egorov, IV Shtastlivtsev, AO Baranov, Passive visco-elastic properties of the small human intestine, In: Proceedings of 2. European Medical & Biological Engineering Conference, December 04-08, 2002, Vienna, Austria, Part I, pp. 244-245.

20. Nikolov S., S. Stoytchev, J.J Nieto and A. Tores. The critical diameter of intracranial aneurysm can be In: Proceedings of 2. European Medical & Biological Engineering Conference, December 04-08, 2002, Vienna, Austria, Part I, pp. 640-641.

21. Stoytchev, S., G. Pallotti and P. Pettazzoni. Optimal design of arterial bypass prostheses diameter. Journal of Mechanics in Medicine and Biology, Vol. 1, No. 2 (2001), pp. 107-122.

22. Turusov, RA, VI Egorov, IV Shtastlivtsev, AO Baranov and S. Stoytchev. Selected biomechanical problems of the human intestinal anastomosis. In: Proc. 9th Nat. Congress on Theor. Appl. Mechanics, 19-22 Sept. 2001,Varna, Bulgaria, Vol. 2, pp. 171-176.

23. Stoytchev, S., G Fratamico and G. Pallotti. Computer study of the effects of peripheral resistance on the wall shear stress near end-to-end arterial anastomoses. Automedica, 2000, vol. 18, pp. 107-126.

24. Stoytchev, S. Mechanical interaction between host arteries and their substitutes. In: 4th EUROMECH Solid Mechanics Conference, Metz, France, June 26-30, 2000, BOOK OF ABSTRACTS II, p. 234.

25. Stoytchev, S. Influences of the peripheral resistance and graft diameter on the wall shear stress near arterial anastomoses. In: PROCEEDINGS of the 3rd International Conference on Bioelectromagnetism and 1st Slovenian-Croatian Meeting on Biomedical Engineering, Bled, Slovenia, 8-10 October 2000, pp. 69-70

26. Stoytchev, S., Effects of the peripheral resistance and graft diameter on the wall shear stress near end-to-end arterial anastomoses. In: PROCEEDINGS of the 12th Conference of the European Society of Biomecanics, 27-30 August 2000, Dublin, Ireland, p. 440.

27. Stoytchev, S., G. Fratamico, G. Pallotti. Influences of the peripheral resistance on the wall shear stressnear the anastomoses of a synthetic graft and human arteries. In: IV Congresso Nattionale della Societa Italiana di Matematica Applicata e Industriale, 1-5 Giunio 1998, Messina, v.2, pp.28-30.

28. Stoytchev, S., A. Rachev. Mechanical criteria for design and use of deformable synthetic grafts. J. of Theoretical and Applied Mechanics, Sofia, XXXVII, No. 4, 74-84, 1997

29. Stoytchev, S. Mathematical model of the residual strain in the left ventricle.- In: Topics on Biomathematics, World Scientific Publishing Co. Pte. Ltd., Singapore, 1993, pp. 125-130.

30. Stoytchev, S. Theoretical investigations of residual strain in left ventricle. J. Theoretical and Applied Mechanics (Sofia), 24(3), 107-112, 1993

31. Stoytchev, St., I. Alexandrov, A.Savova. "In vivo" determination of the rheological properties and atherosclerotic changes of the human aorta. In: Progress and Trends in Rheology II, eds. H.Giesekus and M.F.Hibberd, Supl. to Rheologica Acta, vol.26,1988, 476-477.

32. Dragoichev, Ch., A. Savova, S. Stoytchev, B. Finkov. Determinants of the left ventricular function in patients with coronary heart disease: A multivariate approach.- Cor Vasa, 26(5), 353-360, 1984

33. Savova, A., S. Stoytchev. Computer model for chronic heart disease patients investigation. Bulgarian patent No 2666/6.06.1984, Ministry of Health, Sofia.

34. Savova, A., S. Stoytchev, R. Ivanova. A method for classification of patients with ischemic heart disease. Bulgarian patent No 1612/6.05.1983, Medical Academy, Sofia.

35. Savova,A., L. Zahariev, St. Stoytchev. Quantitative evaluation of coronary stenosis.- Savr. Med., 34, No 1, 149-156, 1983.

36. Stoytchev, S. Stress-strain relationships for large blood vessels.- Mech. Compos. Mater.(Riga), 1980,1, 92-99 (in russian).

37. Stoychev, S. Constitutive equations for large human arteries.-In: Rheology, volume 3: Applications, Plenum Press, New York, 1980, 553-559.

38. Stoichev, S. Stress-deformation relationships for large human arteries.- Mech. Compos. Mater.(USA), v.16, N 1, 81-86, 1980

39. Stoychev, S., L. Draganov, A. Rachev. A device for measuring the elastic properties of the blood vessel segments.- Bulgarian patent No 867/26.04.1977, Ministry of Health.

40. Brankov, G., A. Rachev, S. Stoychev. A composite model of large blood vessels.- In: Mechanics of Biological Solids, Publ. House of the Bulgarian Academy of Sciences, Sofia, 1977, 71-78..

41. Brankov, G., A. Rachev, S. Stoychev. On the nonlinear elastic behavior of the biological membranes.- In: Proc. of the Second National Congress on Theoretical and Applied Mechanics, 1976,vol.2, 785-794.

 

Recent Projects:

  1. In Bulgaria

    1. “Analysis of the mechanical interaction between arteries and their substitutes”, Grant MM-601/96, NSF (Bulgaria);

    2. “Biomechanical study of arterial aneurysms”, Grant MM-1302/2003, NSF (Bulgaria);

    3. “Biomechanical study of synthetic substitutes of soft biological tissues”, Grant TH-1502/2005, NSF (Bulgaria);

    4. “Experimental study and modeling of basic phenomena in bioprocess systems”, Grant of the Institute of Mechanics, 2006.

  2. International

    1. “Mechanical aspects of the stability of the intestinal anastomosis”, Bilateral Cooperation with Russian Academy of Sciences, Institute of Chemical Physics, 2002-2005;

    2. “Mechanical aspects of the intestinal peristaltic and anastomosis”, Bilateral Cooperation with Russian Academy of Sciences, Institute of Chemical Physics, 2006;

    3. “Comparative analysis of the mechanical properties of human blood vessels and synthetic vascular grafts”, Science Cooperation with Riga Stradins University, Latvia, 2005.

 

Honors: Golden Medal of Bulgarian Academy of Sciences for scientific activity

 


Modified date:28-03-2012