| Antibacterial activity of methylated chitosan and chitooligomer derivatives: Synthesis and structure activity relationships ÖV Rúnarsson, J Holappa, T Nevalainen, M Hjálmarsdóttir, T Järvinen, ... European Polymer Journal 43 (6), 2660-2671, 2007 | 195 | 2007 |
| Antimicrobial activity of chitosan N-betainates J Holappa, M Hjálmarsdóttir, M Másson, Ö Rúnarsson, T Asplund, ... Carbohydrate Polymers 65 (1), 114-118, 2006 | 159 | 2006 |
| Synthesis and characterization of chitosan N-betainates having various degrees of substitution J Holappa, T Nevalainen, J Savolainen, P Soininen, M Elomaa, R Safin, ... Macromolecules 37 (8), 2784-2789, 2004 | 129 | 2004 |
| Antibacterial activity of N-quaternary chitosan derivatives: Synthesis, characterization and structure activity relationship (SAR) investigations ÖV Rúnarsson, J Holappa, C Malainer, H Steinsson, M Hjálmarsdóttir, ... European Polymer Journal 46 (6), 1251-1267, 2010 | 126 | 2010 |
| Antimicrobial activity of piperazine derivatives of chitosan M Másson, J Holappa, M Hjálmarsdóttir, ÖV Rúnarsson, T Nevalainen, ... Carbohydrate polymers 74 (3), 566-571, 2008 | 122 | 2008 |
| N-selective ‘one pot’synthesis of highly N-substituted trimethyl chitosan (TMC) ÖV Rúnarsson, J Holappa, S Jónsdóttir, H Steinsson, M Másson Carbohydrate polymers 74 (3), 740-744, 2008 | 79 | 2008 |
| tert-Butyldimethylsilyl O-protected chitosan and chitooligosaccharides: Useful precursors for N-modifications in common organic solvents ÖV Rúnarsson, C Malainer, J Holappa, ST Sigurdsson, M Másson Carbohydrate research 343 (15), 2576-2582, 2008 | 68 | 2008 |
| Synthesis of novel quaternary chitosan derivatives via N-chloroacyl-6-O-triphenylmethylchitosans J Holappa, T Nevalainen, P Soininen, M Másson, T Järvinen Biomacromolecules 7 (2), 407-410, 2006 | 58 | 2006 |
| N-Chloroacyl-6-O-triphenylmethylchitosans: Useful Intermediates for Synthetic Modifications of Chitosan J Holappa, T Nevalainen, P Soininen, M Elomaa, R Safin, M Másson, ... Biomacromolecules 6 (2), 858-863, 2005 | 51 | 2005 |
| Novel Water‐Soluble Quaternary Piperazine Derivatives of Chitosan: Synthesis and Characterization J Holappa, T Nevalainen, R Safin, P Soininen, T Asplund, T Luttikhedde, ... Macromolecular bioscience 6 (2), 139-144, 2006 | 46 | 2006 |
| Cyclodextrins and chitosan derivatives in sublingual delivery of low solubility peptides: A study using cyclosporin A, α-cyclodextrin and quaternary chitosan N-betainate J Mannila, K Järvinen, J Holappa, L Matilainen, S Auriola, P Jarho International journal of pharmaceutics 381 (1), 19-24, 2009 | 31 | 2009 |
| Effect of N-betainate and N-piperazine derivatives of chitosan on the paracellular transport of mannitol in Caco-2 cells T Korjamo, J Holappa, S Taimisto, J Savolainen, T Järvinen, J Mönkkönen european journal of pharmaceutical sciences 35 (3), 226-234, 2008 | 10 | 2008 |
| Quaternary polymers J Holappa, T Järvinen, T Nevalainen, J Savolainen, R Safin US Patent 7,838,643, 2010 | 4 | 2010 |
| A novel and selective synthesis of di-and trimethylpiperazinium acetic acid iodide salts J Holappa, T Nevalainen, R Safin, J Vepsäläinen, T Järvinen Tetrahedron letters 47 (3), 323-325, 2006 | 4 | 2006 |
