Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Records 1 - 12 / 12

  • help
  • print

    Print search results

  • export

    Export search results

  • alert
    We will mail you new results for this query: q=Kemmink
Check title to add to marked list
Looped structure of flowerlike micelles revealed by (1)H NMR relaxometry and light scattering
Graaf, A.J. de; Boere, K.W.M. ; Kemmink, J. ; Fokkink, R.G. ; Nostrum, C.F. van; Rijkers, D.T.S. ; Gucht, J. van der; Wienk, H. ; Baldus, M. ; Mastrobattista, E. ; Vermonden, T. ; Hennink, W.E. - \ 2011
Langmuir 27 (2011)16. - ISSN 0743-7463 - p. 9843 - 9848.
block-copolymer micelles - triblock copolymer - aqueous-solution - poly(ethylene glycol) - drug-delivery - aggregation behavior - nmr relaxation - oxide) - micellization - nanoparticles
We present experimental proof that so-called “flowerlike micelles” exist and that they have some distinctly different properties compared to their “starlike” counterparts. Amphiphilic AB diblock and BAB triblock copolymers consisting of poly(ethylene glycol) (PEG) as hydrophilic A block and thermosensitive poly(N-isopropylacrylamide) (pNIPAm) B block(s) were synthesized via atom transfer radical polymerization (ATRP). In aqueous solutions, both block copolymer types form micelles above the cloud point of pNIPAm. Static and dynamic light scattering measurements in combination with NMR relaxation experiments proved the existence of flowerlike micelles based on pNIPAm16kDa-PEG4kDa-pNIPAm16kDa which had a smaller radius and lower mass and aggregation number than starlike micelles based on mPEG2kDa-pNIPAm16kDa. Furthermore, the PEG surface density was much lower for the flowerlike micelles, which we attribute to the looped configuration of the hydrophilic PEG block. 1H NMR relaxation measurements showed biphasic T2 relaxation for PEG, indicating rigid PEG segments close to the micelle core and more flexible distal segments. Even the flexible distal segments were shown to have a lower mobility in the flowerlike micelles compared to the starlike micelles, indicating strain due to loop formation. Taken together, it is demonstrated that self-assemblies of BAB triblock copolymers have their hydrophilic block in a looped conformation and thus indeed adopt a flowerlike conformation.
1H NMR analysis of the partly-folded non-native two-disulphide intermediates (30-51,5-14) and (30-51,5-38) in the folding pathway of bovine pancreatic trypsin inhibitor.
Mierlo, C.P.M. van; Kemmink, J. ; Neuhaus, D. ; Darby, N.J. ; Creighton, T.E. - \ 1994
Journal of Molecular Biology 235 (1994). - ISSN 0022-2836 - p. 1044 - 1061.
Local structure due to an aromatic-amide interaction observed by 1H-nuclear magnetic resonancespectroscopy in peptides related to the N terminus of bovine pancreatic trypsin inhibitor
Kemmink, Johan ; Mierlo, Carlo P.M. van; Scheek, Ruud M. ; Creighton, Thomas E. - \ 1993
Journal of Molecular Biology 230 (1993)1. - ISSN 0022-2836 - p. 312 - 322.
Aromatic hydrogen bonds - Aromatic-amide interaction - Bovine pancreatic trypsin inhibitor (BPTI) - NMR - Peptide conformation

A synthetic peptide corresponding to the 15 N-terminal residues of bovine pancreatic trypsin inhibitor, with serine replacing the two cysteine residues, has been characterized by 1H-nuclear magnetic resonance spectroscopy. This peptide has a very disordered conformation that is essentially the same when it is part of the analogue of the (30-51) one-disulphide intermediate in folding. This confirms the conclusion of a previous paper, that the (30-51) intermediate is partially folded, with the N-terminal segment disordered. Local elements of non-randomconformation were observed in the peptide. Especially prominent was an apparently electrostaticinteraction between the face of the aromatic ringof Tyr10 and the amide group of Gly12, which caused the latter to have a very anomalous chemicalshift. A similar interaction was observed in shorter peptides, especially in tetrapeptides with the sequences Tyr/Phe-X-Gly-Y. The local nature of this interaction indicates that it should be a general feature in peptides and in unfolded proteins with such a sequence.

Determination of the nutritive value of roughages by the "in vitro" digestibility method
Koelen, C.J. van der; Kemmink, A. ; Dijkstra, N.D. - \ 1975
Hoorn : Institute for Animal Feeding and Nutrition Research "Hoorn" (Intern rapport / Instituut voor Veevoedingsonderzoek "Hoorn" no. 70) - 20
ruwvoer (roughage) - voer - voedingswaarde - in vitro - experimenten - roughage - feeds - nutritive value - experiments
De voederopname door grazende herkauwers: Beweidingsproeven met melkkoeien, waarbij verschillende exogene en endogene indicatoren worden vergeleken
Dijkstra, N.D. ; Kemmink, A. - \ 1970
Wageningen : Pudoc, Centrum voor Landbouwpublikaties en Landbouwdocumentatie (Verslagen van landbouwkundige onderzoekingen 738) - 23
geiten - begrazing - gerantsoeneerde voeding - schapen - zoölogie - goats - grazing - restricted feeding - sheep - zoology
Verslag van een bezoek aan de "Jahreshauptversammlung des Verbandes Deutscher Landwirtschaftlicher Untersuchungs- und Forschungsanstalten" te Leubeck. 30 september tot 5 oktober 1968
Deijs, W.B. ; Hartmans, J. ; Kemmink, A. - \ 1969
Wageningen : Instituut voor biologisch en scheikundig onderzoek van landbouwgewassen (Verslagen / Instituut voor Biologisch en Scheikundig Onderzoek van Landbouwgewassen nr. 50) - 29
gewassen - biologie - chemie - crops - biology - chemistry
De bepaling van de voederwaarde van ruwvoeders met behulp van de in vitro - verteerbaarheid
Koelen, C.J. van der; Kemmink, A. ; Dijkstra, N.D. - \ 1969
Lelystad : Instituut voor Veevoedingsonderzoek "Hoorn" (Intern rapport / Instituut voor Veevoedingsonderzoek "Hoorn" no. 27) - 16
voer - voedingswaarde - ruwvoer (roughage) - feeds - nutritive value - roughage
De bepaling van stikstof in organisch materiaal volgens Kjeldahl - Willfahrt - Gunning met behulp van een electrisch verwarmd destructieapparaat, fabrikaat Gerhardt
Kemmink, A. - \ 1969
Lelystad : Instituut voor Veevoedingsonderzoek "Hoorn" (Intern rapport / Instituut voor Veevoedingsonderzoek "Hoorn" no. 17) - 15
analyse - organische stikstofverbindingen - kjeldahlmethode - voer - analysis - organic nitrogen compounds - kjeldahl method - feeds
De voederopname door grazende herkauwers: Chroomoxide en polyethyleen als exogene indicatoren en chromogeen als endogene indicator voor de bepaling van de grasopname
Kemmink, A. ; Dijkstra, N.D. - \ 1968
Wageningen : Pudoc, Centrum voor Landbouwpublikaties en Landbouwdocumentatie (Verslagen van landbouwkundige onderzoekingen 717) - 29
geiten - begrazing - gerantsoeneerde voeding - schapen - zoölogie - goats - grazing - restricted feeding - sheep - zoology
De bepaling van ruw vet in veevoeders en faeces
Kemmink, A. - \ 1968
Hoorn : [s.n.] (Intern rapport / Instituut voor veevoedingsonderzoek "Hoorn" no. 20) - 13
analyse - chemie - vetten - voer - oliën - kwantitatieve analyse - onderzoek - analytische scheikunde - wetenschap - wetenschappelijk onderzoek - analysis - chemistry - fats - feeds - oils - quantitative analysis - research - analytical chemistry - science - scientific research
De bepaling van ruwe celstof in veevoeders en mest
Kemmink, A. - \ 1968
Hoorn : [s.n.] (Intern rapport / Instituut voor veevoedingsonderzoek "Hoorn" no. 23)
analyse - koolhydraten - celmembranen - celwanden - cellulose - chemie - kwantitatieve analyse - analytische scheikunde - analysis - carbohydrates - cell membranes - cell walls - chemistry - quantitative analysis - analytical chemistry
Verslag van de jaarvergadering van "Der Verband Deutscher Landwirtschaftlicher Untersuchungs- und Forschungsanstalten" en de bijeenkomst van de "Internationale Werkgroep voor het Chemisch Onderzoek van voedermiddelen", gehouden te Kassel (West-Duitsland) van 25 tot 30 sept. 1967
Kemmink, A. ; Leeuwen, J.M. van - \ 1967
Lelystad : Instituut voor Veevoedingsonderzoek "Hoorn" (Intern rapport / Instituut voor Veevoedingsonderzoek "Hoorn" no. 15) - 17
diervoedering - animal feeding
Check title to add to marked list

Show 20 50 100 records per page

 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.