2. M. Vija, G. Bacneanu, M. Petcu, D. Stilpeanu, M. Vinatoru, "Electron Transfer from Alkaline Metals to Nitrocompunds Ultrasonically Stimulated." Poster presented at 19th, Symposium on chemical research, Calimanesti, 23-25 October, 1993, Romania.
3. S. Velea, D. Stilpeanu, M. Vinatoru, "The Use of Ultrasound in Organic Compounds Synthesis." Poster presented at the Chemistry and Engineering Conference, Bucharest, 29-30 October, 1993. Romania.
4. I. R. Deleanu, M. Vinatoru, "Drugs and Enzymes Ultrasonic Delivery System." Poster presented at 19th, Symposium on chemical research, Calimanesti, 23-25 October, 1993, Romania.
5. M. Vinatoru, D. Niculescu-Duvaz, F. Badea, "An Unusual Electron Transfer from Triphenyl-methane, Promoted by Ultrasounds." Poster presented at 4th Meeting of European Society of Sonochemistry, Belgium, September 1994.
6. I. R. Deleanu, M. Vinatoru, V. Trandafir, "Ultrasonically Controlled Delivery System of Bioactive Agents Immobilized on Collagen Membrane." Poster presented at 4th Meeting of European Society of Sonochemistry, Belgium, September 1994.
7. S. Velea, D. Petrescu, S. Serban, M. Vinatoru, "The Use of Ultrasounds in Pesticides Synthesis" Poster presented at first Symposium 'Chemistry and Plant Protection' PROPLANT, Calimanesti, 1-4 November 1994. Romania.
8. D. Stilpeanu, M. Petcu, M. Vija, G. Bacneanu, C. Brinzan, M. Vinatoru, "Ultrasonically Obtained Natural Extracts from Plants, as Synergetic for Pesticides" Poster presented at first Symposium 'Chemistry and Plant Protection', PROPLANT, Calimanesti, 1-4 November 1994. Romania.
9. I. R. Deleanu, V. Trandafir, M. V�n�toru, V. Cialacu, "Ultrasonic Effect on Transdermal Collagenic Occlusive Dressings" Poster presented at the first World Congress on Ultrasounds, 3-7 September 1995, Berlin, Germany.
10. D. Stilpeanu, M. Petcu, M. Vija, G. Bacneanu, C. Brinzan, M. Vinatoru, "Ultrasonically Improved Extraction of Active Principle from Plants. COPERNICUS Joint Research Programme: ROMANIA, UNITED KINGDOM and SLOVAK REPUBLIC." Poster presented at the first World Congress on Ultrasounds, 3-7 September 1995, Berlin, Germany.
11. M. Vinatoru, Ana-Maria Pocsan, "The Synthesis of 5H-5Cl-dibenzo[a,d]cycloheptatriene and reaction with nitrobenzene under thermally and ultrasonically activation" Poster presented 21st Symposium on chemical research, Calimanesti, 23-25 October, 1995, Romania.
12. S. Velea, D. Stilpeanu, G. Bacneanu, M. Vinatoru, "Non-conventional techniques and Technologies used for Conditioned Pesticides" Poster presented at 2nd Symposium 'Chemistry and Plant Protection', PROPLANT, Calimanesti, 7-10; November 1995. Romania.
13. M. Vinatoru, M. Toma, O. Radu, "The Use of Ultrasounds for Extraction of Bioactive Principles from Plants" Poster presented at 5th Meeting of European Society of Sonochemistry, Cambridge, 7-11 July, 1996, United Kingdom.
14. S. Velea, S. Serban, D. Stilpeanu, M. Vinatoru, "New Aspects Related to Ultrasonic Extraction of Bioactive Principles from Plants" Poster presented at 5th Meeting of European Society of Sonochemistry, Cambridge, 7-11 July, 1996, United Kingdom.
15. M. Toma, M. Vinatoru, O. Radu, "The use of ultrasounds for extraction of bioactive principles from plants", Poster presented at first International Congress of Botanical gardens, Arad, August, 1996, Romania.
16. M. Vinatoru, M. Toma, O. Radu, T. J. Mason, "Ultrasounds for extraction of plant's bioactive principles", Poster presented at 22nd Symposium on chemical research, Olanesti, 23-25 October, 1996, Romania.
17. M. Vinatoru, C. Bernard, C. Degrand, "Modification of Conductivity of the Organic Solvents by Means of Ultrasounds", Poster presented at the COST anual meeting, Chambery, 1-4 December, 1996, France.
18. N. D. Totir, M. I. Ionita, M. Vinatoru, "Photoelectrochemical and Sonoelectrochemical Study of Ethanol Electrochemical Oxidation", Poster presented at The 9th Conference on Physical Chemistry, Galati, 23-25 September, 1998, Romania.
19. M. Vinatoru, M.Toma, "Ultrasonic Extraction of Active Principles from Plants. Allelopathy: A New Route Towards Useful Compounds for Agriculture." Poster presented at 25-th Symposium on chemical research, Calimanesti, 6-8 October, 1999, Romania.
20. Maria Ileana Ionita, N. Ene, M. Vinatoru, "Sonoelectrochemical Studies of Ehtanol Oxidation in Alkaline Medium" Poster presented at 51st ISE Meeting 'Electrochemistry at the Turn of the Millenium' 3-8 September, 2000, Warsaw, Poland.