Jukka Holappa

Antimicrobial activity of piperazine derivatives of chitosan

M. Másson, Jukka Holappa, M. Hjálmarsdóttir, 2008 .

Antibacterial activity of methylated chitosan and chitooligomer derivatives: Synthesis and structure activity relationships

M. Másson, Jukka Holappa, M. Hjálmarsdóttir, 2007 .

Synthesis and Characterization of Chitosan N-Betainates Having Various Degrees of Substitution

P. Soininen, T. Pakkanen, M. Elomaa, 2004 .

N-Chloroacyl-6-O-triphenylmethylchitosans: useful intermediates for synthetic modifications of chitosan.

P. Soininen, M. Elomaa, M. Másson, 2005, Biomacromolecules.

Synthesis of novel quaternary chitosan derivatives via N-Chloroacyl-6-O-triphenylmethylchitosans.

P. Soininen, M. Másson, Jukka Holappa, 2006, Biomacromolecules.

N-selective ‘one pot’ synthesis of highly N-substituted trimethyl chitosan (TMC)

M. Másson, Jukka Holappa, Ögmundur Vidar Rúnarsson, 2008 .

Cyclodextrins and chitosan derivatives in sublingual delivery of low solubility peptides: A study using cyclosporin A, alpha-cyclodextrin and quaternary chitosan N-betainate.

K. Järvinen, S. Auriola, Jukka Holappa, 2009, International journal of pharmaceutics.

Antibacterial activity of N-quaternary chitosan derivatives: Synthesis, characterization and structure activity relationship (SAR) investigations

M. Másson, Jukka Holappa, M. Hjálmarsdóttir, 2010 .

Effect of N-betainate and N-piperazine derivatives of chitosan on the paracellular transport of mannitol in Caco-2 cells.

J. Mönkkönen, Jukka Holappa, J. Savolainen, 2008, European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences.

tert-Butyldimethylsilyl O-protected chitosan and chitooligosaccharides: useful precursors for N-modifications in common organic solvents.

S. Sigurdsson, M. Másson, Jukka Holappa, 2008, Carbohydrate research.

Antimicrobial activity of chitosan N-betainates

P. Soininen, M. Másson, Jukka Holappa, 2006 .

Novel water-soluble quaternary piperazine derivatives of chitosan: synthesis and characterization.

P. Soininen, M. Másson, Jukka Holappa, 2006, Macromolecular Bioscience.

A novel and selective synthesis of di- and trimethylpiperazinium acetic acid iodide salts

Jukka Holappa, T. Nevalainen, J. Vepsäläinen, 2006 .