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author = "Dijkstra, P"
<< < 4 5 6 7 8 > >>

Found 75 documents, displaying page 3 of 8

In vivo and in vitro degradation of glycine/DL-lactic acid copolymers

Author(s) : Schakenraad, J.M. , Nieuwenhuis, P. , Molenaar, I. , Helder, Janneke , Dijkstra, P.J. , Feijen, J.
Description : A series of copolymers of glycine and DL-lactic acid with various compositions was synthesized and their in vivo and in vitro degradation behavior was studied. For the in vivo examination, discs of the copolymer films were subcutaneously implanted in rats. The in vitro studies were carried out in ph...
Repository : University of Twente Publications
Language(s) : Undetermined

Phase behavior of polylactides in solvent-nonsolvent mixtures

Author(s) : Witte van de, P. , Dijkstra, P.J. , Berg van den, J.W.A. , Feijen, J.
Description : Isothermal phase diagrams for the semicrystalline poly-L-lactide (PLLA) and the amorphous poly-DL-lactide (PDLLA) in combination with several solvent-nonsolvent combinations (dioxane/water, dioxane/methanol, chloroform/methanol, and NMP/water) have been determined. The locations of the liquid-liquid...
Repository : University of Twente Publications
Language(s) : Undetermined

Block copolymers of poly(L-lactide) and poly(ε-caprolactone) or poly(ethylene glycol) prepared by reactive extrusion

Author(s) : Stevels, W.M. , Bernard, A. , Witte van de, P. , Dijkstra, P.J. , Feijen, J.
Description : Blends of poly(L-lactide) (PLLA) and poly(-caprolactone) (PCL) were prepared in a co-rotating twin screw miniextruder (40 rpm, 200°). It was attempted to prepare multiblock copolymers by allowing a controlled number of transesterification reactions. Various cat-alysts (n-Bu3SnOMe, Sn(Oct)2, Ti(OBu)4...
Repository : University of Twente Publications
Language(s) : Undetermined

Metastable liquid-liquid and solid-liquid phase boundaries in polymer-solvent-nonsolvent systems

Author(s) : Witte van de, P. , Dijkstra, P.J. , Berg van den, J.W.A. , Feijen, J.
Description : In general liquid-liquid demixing processes are responsible for the porous morphology of membranes obtained by immersion precipitation. For rapidly crystallizing polymers, solid-liquid demixing processes also generate porous morphologies. In this study, the interference of both phase transitions has...
Repository : University of Twente Publications
Language(s) : Undetermined

Phase separation processes in polymer solutions in relation to membrane formation

Author(s) : Witte van de, P. , Dijkstra, P.J. , Berg van den, J.W.A. , Feijen, J.
Description : This review covers new experimental and theoretical physical research related to the formation of polymeric membranes by phase separation of a polymer solution, and to the morphology of these membranes. Two main phase separation processes for polymeric membrane formation are discussed: thermally ind...
Repository : University of Twente Publications
Language(s) : Undetermined

An experimental facility to study effects of CO2 enrichment on the daily and long-term carbon exchange of a crop/soil system.

Author(s) : Geijn, S.C., van de , Dijkstra, P. , Kleef, J., van , Groenwold, J. , Goudriaan, J.
Description :
Repository : Wageningen University and Researchcenter Publications
Language(s) : English

Interactions between atmospheric CO2-concentration, temperature and environmental factors with respect to photosynthesis, assimilate distribution and development rhythm of three agricultural crops

Author(s) : Dijkstra, P. , Schapendonk, A.H.C.M. , Geijn, S.C., van de , Visser, A. , Rozema, J.
Description :
Repository : Wageningen University and Researchcenter Publications
Language(s) : Undetermined

Effects of climate change on wheat productivity: model evaluation of observed yearto-year variability of the CO2 response

Author(s) : Geijn, S.C. , Dijkstra, P. , Grashoff, C. , Schapendonk, A.H.C.M. , Nonhebel, S.
Description :
Repository : Wageningen University and Researchcenter Publications
Language(s) : Undetermined

Grasslands: a buffer for increasing atmospheric carbon dioxide?

Author(s) : Schapendonk, A.H.C.M. , Dijkstra, P. , Geijn, S.C., van de , Groenwold, J.
Description :
Repository : Wageningen University and Researchcenter Publications
Language(s) : Undetermined

Two year growth and carbon partitioning of Lolium perenne swards at ambient and doubled carbon dioxide concentrations

Author(s) : Schapendonk, A.H.C.M. , Dijkstra, P. , Geijn, S.C., van de , Groenwold, J.
Description :
Repository : Wageningen University and Researchcenter Publications
Language(s) : Undetermined
<< < 4 5 6 7 8 > >>

Found 75 documents, displaying page 3 of 8