X-ray microdiffraction on flow-controlled biomolecular assemblies

• Autorzy: Evans H.M. , Dootz R. , Köster S. , Pfohl T.
• Języki publikacji: EN

Abstrakty

EN

The study of liquid crystalline assemblies, with an emphasis on biological phenomena, is now accessible using newly developed microdevices integrated with X-ray analysis capability. Many biological systems can be described in terms of gradients, mixing, and confinement, all of which can be mimicked with the use of appropriate microfluidic designs. The use of hydro-dynamic focusing creates well-defined mixing conditions that vary depending on parameters such as device geometry, and can be quantified with finite element modelling. We describe experiments in which geometry and strain rate induce finite changes in liquid crystalline orientation. We also demonstrate the online supramolecular assembly of lipoplexes. The measurement of lipoplex orientation as a function of flow velocity allows us to record a relaxation process of the lipoplexes, as evidenced by a remarkable 4-fold azimuthal symmetry. All of these processes ale accessible due to the intentional integration of design elements in the microdevices.

Słowa kluczowe

EN

X-ray diffraction; hydrodynamic focusing; DNA; microfluidic; self-assembly; lipoplex

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2007
• Tom: Vol. 55, nr 2
• Strony: 217--227
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Evans H.M.

autor

Dootz R.

autor

Köster S.

autor

Pfohl T.

• Max Planck Institute for Dynamics and Self-Organization, Bunsenstr 10, D-37073 Gottingen, Germany,

Bibliografia

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