EDITOR LETTER, p. 5

A. Wojtasz-Pająk
Chemical degradation of chitosan obtained from krill chitin, p. 7

J. Szumilewicz, W. Meller, A. Wojtasz-Pająk
Determination of the molar mass of chitosan by means of size exclusion chromatography coupled with triple detector system, p. 15

S. Trzciński, M. Wilkońska, D. U. Staszewska
Effect of ultrasounds on the heterogeneous de-N-acetylation of chitins. l. N-acetylation degree and N-acetylation degree distribution changes, p. 25

J. Marszałek, M. Mucha, L. Szosland
Biodegradation of blends with dibutyrylchitin in presence of in bio active CL, p. 31

M. M. Jaworska, E. Konieczna, H. Kusaoke
Chitosanolytic enzyme from the fungus Absidia orchidis, p. 43

A. Chmiel, R. Zarzycki, Z. Modrzejewska, T. Antczak, M. Szczęsna-Antczak
Chitosan as a carrier in the process of immobilisation, p. 51

M.  Kucharska,  A.  Niekraszewicz,  M.  Wiśniewska-Wrona, H. Struszczyk
Manufacture and assessment of medical dressing from variousforms chitosan, p. 63

A. Niekraszewicz, H. Struszczyk, M. Kucharska, H. Gonera, D. Paluch, S. Pielka, J. Staniszewska-Kuś, L. Solski
Wound-dressing non-woven containing chitosan fibres, p. 69

K. H. Bodek
Effect of chitosan film composition on release of ketoprofen in vitro, p. 79

J. Ignacak, B. Ostrowska, I. Pałka, H. Struszczyk
The in vitro effect of microcrystalline chitosan and Cytochalasin D on the activity of the M2 isoenzyme of pyruvate kinase from nuclei Ehrlich Ascites Tumor cells, p. 91

B. Kochańska, A. Kędzia, A. Kędzia
In vitro activity of chitosan ascorbate against yeastlike fungi isolated from oral cavity and respiratory tract in chlidren, p. 101

B. Kochańska, A. Kędzia, A. Wojtasz-Pająk
Susceptibility of oral streptococci to chitosan ascorbate, p. 107

M. Grabowska, J. Ignacak, H. Struszczyk
The influence of microcrystalline chitosan on (Ca2+ATPase activity from Ehrlich ascite tumor membrane and regular mammary gland mouse cells in vitro, p. 113

P. Drenda, P. Lampe
The influence of chitosan-placental dressing on removing microbes from experimentally infected wounds, p. 121

S. V. Nemtsev, V. P. Varlamov, K. G. Skryabin
Stimulation of plant growth and induction of plant to diseases by acid-free water-soluble chitosan, p. 125

D. Pięta, A. Pastucha, H. Struszczyk, W. Wójcik
The effect of chitosan and runner bean (Phaseolus coccineus L.) cultivation on tne formation of microorganisms communities in the soil, p. 133

J. Borkowski, H. Struszczyk, A. Niekraszewicz
Effect of chitosan and other preparations on the infection of powdery mildew on tomato, plant growth and red spider population, p. 141

J. Borkowski, T. Kotlińska, A. Niekraszewicz, H. Struszczyk
Effect of chitosan and Tytanit on the growth of top onion and infections with fungal diseases, p. 149

A. Maćkowiak, H. Pospieszny
Dependence of antibacterial activity of chitosan on plant species, p. 155