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Items: 36

1.

Active crystals on a sphere.

Praetorius S, Voigt A, Wittkowski R, Löwen H.

Phys Rev E. 2018 May;97(5-1):052615. doi: 10.1103/PhysRevE.97.052615.

PMID:
29906962
2.

Liquid crystals of hard rectangles on flat and cylindrical manifolds.

Sitta CE, Smallenburg F, Wittkowski R, Löwen H.

Phys Chem Chem Phys. 2018 Feb 14;20(7):5285-5294. doi: 10.1039/c7cp07026h.

PMID:
29405214
3.

Helical paths, gravitaxis, and separation phenomena for mass-anisotropic self-propelling colloids: Experiment versus theory.

Campbell AI, Wittkowski R, Ten Hagen B, Löwen H, Ebbens SJ.

J Chem Phys. 2017 Aug 28;147(8):084905. doi: 10.1063/1.4998605.

4.

[Contaminants in food - successes, challenges and trends].

Fiack S, Wittkowski R.

Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz. 2017 Jul;60(7):685-688. doi: 10.1007/s00103-017-2583-0. German. No abstract available.

PMID:
28623380
5.

[Persistent organic contaminants in food : Exposure, hazard potential, and health assessment].

Pabel U, Buhrke T, Abraham K, Nölke T, Gehling M, Lampen A, Lahrssen-Wiederholt M, Wittkowski R.

Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz. 2017 Jul;60(7):697-706. doi: 10.1007/s00103-017-2563-4. Review. German.

PMID:
28573516
6.

Symmetry breaking in clogging for oppositely driven particles.

Glanz T, Wittkowski R, Löwen H.

Phys Rev E. 2016 Nov;94(5-1):052606. Epub 2016 Nov 17.

PMID:
27967033
7.

Hard rectangles near curved hard walls: Tuning the sign of the Tolman length.

Sitta CE, Smallenburg F, Wittkowski R, Löwen H.

J Chem Phys. 2016 Nov 28;145(20):204508.

PMID:
27908133
8.

Light-induced self-assembly of active rectification devices.

Stenhammar J, Wittkowski R, Marenduzzo D, Cates ME.

Sci Adv. 2016 Apr 1;2(4):e1501850. doi: 10.1126/sciadv.1501850. eCollection 2016 Apr.

9.

Active Model H: Scalar Active Matter in a Momentum-Conserving Fluid.

Tiribocchi A, Wittkowski R, Marenduzzo D, Cates ME.

Phys Rev Lett. 2015 Oct 30;115(18):188302. doi: 10.1103/PhysRevLett.115.188302. Epub 2015 Oct 28.

PMID:
26565505
10.

Pressure and phase equilibria in interacting active brownian spheres.

Solon AP, Stenhammar J, Wittkowski R, Kardar M, Kafri Y, Cates ME, Tailleur J.

Phys Rev Lett. 2015 May 15;114(19):198301. Epub 2015 May 11.

PMID:
26024201
11.

Can the self-propulsion of anisotropic microswimmers be described by using forces and torques?

ten Hagen B, Wittkowski R, Takagi D, Kümmel F, Bechinger C, Löwen H.

J Phys Condens Matter. 2015 May 20;27(19):194110. doi: 10.1088/0953-8984/27/19/194110. Epub 2015 Apr 29.

PMID:
25923010
12.

Regulatory toxicology in the twenty-first century: challenges, perspectives and possible solutions.

Tralau T, Oelgeschläger M, Gürtler R, Heinemeyer G, Herzler M, Höfer T, Itter H, Kuhl T, Lange N, Lorenz N, Müller-Graf C, Pabel U, Pirow R, Ritz V, Schafft H, Schneider H, Schulz T, Schumacher D, Zellmer S, Fleur-Böl G, Greiner M, Lahrssen-Wiederholt M, Lampen A, Luch A, Schönfelder G, Solecki R, Wittkowski R, Hensel A.

Arch Toxicol. 2015 Jun;89(6):823-50. doi: 10.1007/s00204-015-1510-0. Epub 2015 Mar 28. Review.

PMID:
25820917
13.

Activity-induced phase separation and self-assembly in mixtures of active and passive particles.

Stenhammar J, Wittkowski R, Marenduzzo D, Cates ME.

Phys Rev Lett. 2015 Jan 9;114(1):018301. Epub 2015 Jan 6.

PMID:
25615509
14.

Gravitaxis of asymmetric self-propelled colloidal particles.

ten Hagen B, Kümmel F, Wittkowski R, Takagi D, Löwen H, Bechinger C.

Nat Commun. 2014 Sep 19;5:4829. doi: 10.1038/ncomms5829.

PMID:
25234416
15.

Kümmel et al. reply:.

Kümmel F, ten Hagen B, Wittkowski R, Takagi D, Buttinoni I, Eichhorn R, Volpe G, Löwen H, Bechinger C.

Phys Rev Lett. 2014 Jul 11;113(2):029802. Epub 2014 Jul 10. No abstract available.

PMID:
25062249
16.

Scalar φ4 field theory for active-particle phase separation.

Wittkowski R, Tiribocchi A, Stenhammar J, Allen RJ, Marenduzzo D, Cates ME.

Nat Commun. 2014 Jul 10;5:4351. doi: 10.1038/ncomms5351.

PMID:
25008346
17.

Brownian motion and the hydrodynamic friction tensor for colloidal particles of complex shape.

Kraft DJ, Wittkowski R, ten Hagen B, Edmond KV, Pine DJ, Löwen H.

Phys Rev E Stat Nonlin Soft Matter Phys. 2013 Nov;88(5):050301. Epub 2013 Nov 22.

PMID:
24329198
18.

Dynamics of a deformable active particle under shear flow.

Tarama M, Menzel AM, ten Hagen B, Wittkowski R, Ohta T, Löwen H.

J Chem Phys. 2013 Sep 14;139(10):104906. doi: 10.1063/1.4820416.

PMID:
24050364
19.

Structure and dynamics of interfaces between two coexisting liquid-crystalline phases.

Praetorius S, Voigt A, Wittkowski R, Löwen H.

Phys Rev E Stat Nonlin Soft Matter Phys. 2013 May;87(5):052406. Epub 2013 May 28.

PMID:
23767553
20.

Circular motion of asymmetric self-propelling particles.

Kümmel F, ten Hagen B, Wittkowski R, Buttinoni I, Eichhorn R, Volpe G, Löwen H, Bechinger C.

Phys Rev Lett. 2013 May 10;110(19):198302. Epub 2013 May 9.

PMID:
23705745
21.

Extended dynamical density functional theory for colloidal mixtures with temperature gradients.

Wittkowski R, Löwen H, Brand HR.

J Chem Phys. 2012 Dec 14;137(22):224904. doi: 10.1063/1.4769101.

PMID:
23249029
22.

Self-propelled Brownian spinning top: dynamics of a biaxial swimmer at low Reynolds numbers.

Wittkowski R, Löwen H.

Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Feb;85(2 Pt 1):021406. Epub 2012 Feb 21.

PMID:
22463211
23.

Microscopic and macroscopic theories for the dynamics of polar liquid crystals.

Wittkowski R, Löwen H, Brand HR.

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Oct;84(4 Pt 1):041708. Epub 2011 Oct 28.

PMID:
22181158
24.

Brownian dynamics of a self-propelled particle in shear flow.

ten Hagen B, Wittkowski R, Löwen H.

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Sep;84(3 Pt 1):031105. Epub 2011 Sep 2.

PMID:
22060326
25.

Stability of liquid crystalline phases in the phase-field-crystal model.

Achim CV, Wittkowski R, Löwen H.

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6 Pt 1):061712. Epub 2011 Jun 29.

PMID:
21797392
26.

Polar liquid crystals in two spatial dimensions: the bridge from microscopic to macroscopic modeling.

Wittkowski R, Löwen H, Brand HR.

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6 Pt 1):061706. Epub 2011 Jun 22.

PMID:
21797386
27.

Derivation of a three-dimensional phase-field-crystal model for liquid crystals from density functional theory.

Wittkowski R, Löwen H, Brand HR.

Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Sep;82(3 Pt 1):031708. Epub 2010 Sep 24.

PMID:
21230092
28.

A basic tool for risk assessment: a new method for the analysis of ergot alkaloids in rye and selected rye products.

Müller C, Kemmlein S, Klaffke H, Krauthause W, Preiss-Weigert A, Wittkowski R.

Mol Nutr Food Res. 2009 Apr;53(4):500-7. doi: 10.1002/mnfr.200800091.

PMID:
19360756
29.

Zero tolerances in food and animal feed -- are there any scientific alternatives? A European point of view on an international controversy.

Heberer T, Lahrssen-Wiederholt M, Schafft H, Abraham K, Pzyrembel H, Henning KJ, Schauzu M, Braeunig J, Goetz M, Niemann L, Gundert-Remy U, Luch A, Appel B, Banasiak U, Böl GF, Lampen A, Wittkowski R, Hensel A.

Toxicol Lett. 2007 Dec 10;175(1-3):118-35. Epub 2007 Oct 10.

PMID:
18024010
30.

Determination of ergot alkaloids in rye and rye flour.

Müller C, Klaffke HS, Krauthause W, Wittkowski R.

Mycotoxin Res. 2006 Dec;22(4):197-200. doi: 10.1007/BF02946741.

PMID:
23605708
31.

Results from two interlaboratory comparison tests organized in Germany and at the EU level for analysis of acrylamide in food.

Klaffke H, Fauhl C, Mathar W, Palavinskas R, Wittkowski R, Wenzl T, Anklam E.

J AOAC Int. 2005 Jan-Feb;88(1):292-8.

PMID:
15759754
32.

[Determination of zearalenone in edible oils with SEC and LC-ESI-MS/MS].

Kappenstein O, Klaffke HS, Mehlitz I, Tiebach R, Weber R, Lepschy J, Wittkowski R.

Mycotoxin Res. 2005 Mar;21(1):3-6. doi: 10.1007/BF02954804. German.

PMID:
23605196
33.

Gas chromatographic/mass spectrometric determination of 3-methoxy-1,2-propanediol and cyclic diglycerols, by-products of technical glycerol, in wine: interlaboratory study.

Fauhl C, Wittkowski R, Lofthouse J, Hird S, Brereton P, Versini G, Lees M, Guillou C.

J AOAC Int. 2004 Sep-Oct;87(5):1179-88.

PMID:
15493676
34.

Oenological influences on the D/H ratios of wine ethanol.

Fauhl C, Wittkowski R.

J Agric Food Chem. 2000 Sep;48(9):3979-84.

PMID:
10995300
35.

Gas chromatographic determination of volatile congeners in spirit drinks: interlaboratory study.

Kelly J, Chapman S, Brereton P, Bertrand A, Guillou C, Wittkowski R.

J AOAC Int. 1999 Nov-Dec;82(6):1375-88.

PMID:
10589492
36.

Isomer-specific determination of 2,3,7,8-tetrachlorodibenzo-p-dioxin and related compounds in human fat and food.

Beck H, Eckart K, Mathar W, Rühl CS, Wittkowski R.

Biomed Environ Mass Spectrom. 1988 Oct;16(1-12):161-5.

PMID:
3242665

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