Rezumate Simpozion 2006 - ICECHIM

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4 CUPRINS pag. Comunicări plenare 4 Secţiunea 1. Bioresurse şi biomateriale Comunicări orale 6 Postere 12 Secţiunea 2. Protecţia şi ingineria mediului Comunicări orale 20 Postere 27 Secţiunea 3. Materiale multifuncţionale şi nanocompozite Comunicări orale 42 Postere 62 Secţiunea 4. Chimia medicală şi terapeutică Comunicări orale 87 Postere 90 Comunicări plenare
5 1. BACTERICIDAL MATERIALS BASED ON SILVER NANOPARTICLES I. The Tollens Reaction Revisited Radu Bordeianu VESTOLIT GmbH & Co. KG, Marl, Germany The bactericidal properties of heavy metals are universally known. Silver ocuppies among heavy metals a unique position, due to a combination of low toxicity to humans and strong bacteria killing activity. The virtues of silver were known to ancient Persians, who stored water in silver-lined vessels in order to prevent fouling and to American pioneers of the West who used to preserve milk by putting a silver coin in the jar. The scientific study of the bactericidal properties of silver started in the late 1800s Around the turn of the last century and up to the 1930s silver was used in a wide variety of preparations, from wound dressing to swimming pool disinfection. With the advent of sulfamides and, later, of modern antibiotics the use of silver has decreased dramatically and this versatile disinfectant sank into oblivion. Recently however, the dramatic increase in the number of antibiotic-resistant germs has helped to refocus the attention on silver, mainly in the form of extremely fine crystals (nanoparticles.) Various methods for producing such particles, notably by plasma deposition, are currently being investigated. At VESTOLIT we are in the process of developing bacteriostatic PVC-based materials carrying Ag nanoparticles by a very simple chemical process, involving the well-known Tollens reaction. This implies, in a first phase, the reduction of silver nitrate (as ammonia complex) with aldehydes or other reducing agents in the presence of a protective colloid (polyvinyl alcohol.) The PVA containing silver nanoparticles (typically < 30 nm) can, in the 2 nd step, be used as protective colloid in a conventional suspension polymerization of vinyl chloride. Preliminary investigations carried out in the laboratory of Prof. Dr. Guggenbichler of the University Hospital in Erlangen indicate a high bactericidal activity of PVC profiles and sheets containing small amounts of the new material.
Page 1 and 2: SUB PATRONAJUL MINISTERULUI EDUCAŢ
Page 3: 3 Simpozionul va oferi posibilitate
Page 7 and 8: 7 Sectiunea 1. Bioresurse si biomat
Page 9 and 10: 9 3. TEHNOLOGIE DE REALIZARE A UNUI
Page 11 and 12: 11 5. ANALIZA PRIN INJECTARE IN FLU
Page 13 and 14: 13 Postere 1. EFICIENTA AGROCHIMICA
Page 15 and 16: 15 3. CONDITIONAREA MIJLOACELOR BIO
Page 17 and 18: 17 5. DIRECŢII NOI PENTRU RECUPERA
Page 19 and 20: 19 7. PRODUSE NATURALE UTILIZATE IN
Page 21 and 22: 21 Sectiunea 2. Protectia si ingine
Page 23 and 24: 23 3. MONITORIZAREA POLUANTILOR AER
Page 25 and 26: 25 5. ASSESSMENT OF THE HEAVY METAL
Page 27 and 28: 27 7. IMPACT STUDY OF URBAN WASTE O
Page 29 and 30: 29 2. COAGULANŢI ANORGANICI PRE-PO
Page 31 and 32: 31 4. RP-HPLC METHOD APPLIED TO DIR
Page 33 and 34: 33 6. DETERMINAREA POLUARII APELOR
Page 35 and 36: 35 8. SPECTROSCOPIC TEHNIQUES IN CU
Page 37 and 38: 37 10. BIOTEHNOLOGII INTEGRATE CU P
Page 39 and 40: 39 procesului (aerob sau anaerob, c
Page 41 and 42: 41 50g, viteza de amestecare = 90 r
Page 43 and 44: 43 17. TEHNOLOGIE DE ADSORBTIE A CO
Page 45 and 46: 45 2. OPTICAL CHARACTERISTICS OF PH
Page 47 and 48: 47 2. Meshalkin A., A. Andries, V.
Page 49 and 50: 49 6. PROCEDEU DE OBTINERE A POLIFE
Page 51 and 52: 51 8. DFT CALCULATIONS OF METAL-TET
Page 53 and 54: 53 DE PRODUSE BOLAAMFIFILE Aurelia
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55 12. NEW ADVANCES IN CALCIUM PHOS
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57 14. SINTEZA ŞI STRUCTURA UNOR N
Page 59 and 60:
59 16. NANOCOMPOZITE BUTIL ACRILAT
Page 61 and 62:
61 18. NANOHIBRIDE FILMOGENE CU POL
Page 63 and 64:
63 20. STUDII ASUPRA COMPLEXULUI DE
Page 65 and 66:
65 2. DYE-SENSITIZED SOLAR CELLS BA
Page 67 and 68:
67 5. SUSTAINABLE DEVELOPMENT OF TH
Page 69 and 70:
69 8.COMPORTAREA REOLOGICA A UNOR A
Page 71 and 72:
71 10. ADEZIVI EPOXIMETACRILICI - O
Page 73 and 74:
73 12. TREATMENT TEMPERATURE EFFECT
Page 75 and 76:
75 14. NEW ELASTOMERS BASED ON ALKY
Page 77 and 78:
77 complexe alcatuite atat din lega
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79 19. UTILIZAREA ANALIZEI FIZICO-C
Page 81 and 82:
81 21. TENDINTE SI REALIZARI IN DOM
Page 83 and 84:
83 23. MATERIALE NOI DESTINATE FINI
Page 85 and 86:
85 25. EVALUAREA CICLULUI DE VIATA
Page 87 and 88:
87 INCDTP desfasoara demersuri pent
Page 89 and 90:
89 Substituirea atomilor de hidrog
Page 91 and 92:
91 1. Guillén, C., McInnes, I.B.,
Page 93 and 94:
93 Postere 1. LACTOFERINA - GLICOPR
Page 95 and 96:
95 3. OBTAINING OF SOME N,N’-MALO
Page 97 and 98:
97 drug in aqueous buffer. This app
Page 99 and 100:
99 4 Lindequist U., Niedermeyer T.M
Page 101 and 102:
101 Fondat în 1951, Institutul de
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