14 research outputs found
On the Graphoanalytical Investigation of the Anisotropy of the Physical Properties of Crystals
No full textInvestigation into the structure of Langmuir-Blodgett films prepared from salts of acetylenic acids
No full textOrder and frustration in liquid-crystalline dendrimers
No full textAbstract. X-ray diffraction has been used to elucidate the structure and phase behavior of several liquidcrystalline dendrimers with a different surface topology of the terminal chains. This includes secondgeneration liquid-crystalline block and statistical dendrimers with mixed aliphatic and mesogenic terminal groups as well as homo-dendrimers of several generations containing only mesogenic end groups. The homodendrimers of generation one to four display a monolayer smectic phase, while the fifth generation shows a more ordered columnar phase. The block-dendrimer of the second generation has a bilayer smectic phase. The precise structure of the lamellar ordering has been determined by X-ray reflectivity from thin films on a substrate. The second-generation statistical dendrimer does not show any mesogenic phase. The observed phase behavior is discussed in terms of the frustration due to competition between the stiff geometry of the dendritic matrix and the close-packing conditions of the terminal chains
Interleukin-1 bedingte Endothelzellaktivierung als Invasionsfaktor beim Urothelkarzinom der Harnblase
No full textX-ray diffraction has been used to elucidate the structure and phase behavior of several liquid-crystalline dendrimers with a different surface topology of the terminal chains. This includes second-generation liquid-crystalline block and statistical dendrimers with mixed aliphatic and mesogenic terminal groups as well as homo-dendrimers of several generations containing only mesogenic end groups. The homo-dendrimers of generation one to four display a monolayer smectic phase, while the fifth generation shows a more ordered columnar phase. The block-dendrimer of the second generation has a bilayer smectic phase. The precise structure of the lamellar ordering has been determined by X-ray reflectivity from thin films on a substrate. The second-generation statistical dendrimer does not show any mesogenic phase. The observed phase behavior is discussed in terms of the frustration due to competition between the stiff geometry of the dendritic matrix and the close-packing conditions of the terminal chains
Estimation of the characteristic parameters of the multilayered film model using the patterson differential function
No full textIntestinal development of bovine foetuses during gestation is affected by foetal sex and maternal nutrition
No full textRestoration of structure of thin multilayer films from reflectivity data by stepwise model refinement
No full textStudy of the process of PbS nanocrystal formation in lead stearate and behenate Langmuir-Blodgett films by electron diffraction and x-ray reflectometry
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