Quantenchemische Untersuchung der Elementarprozesse beim Plasmaätzen im System Fluor/Silizium

Opitz, Christian; Müller, Hans; Kodlaa, Adnan

doi:10.1007/bf00809447

Monatsh Chem

1990

DOI: 10.1007/bf00809447

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Quantenchemische Untersuchung der Elementarprozesse beim Plasmaätzen im System Fluor/Silizium

Christian Opitz

Hans Müller

Adnan Kodlaa

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1994

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Cited by 2 publications

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Optical activity measurements in solids 5. Optical rotation of natural polymers

Bartus¹,

Vogl²

1994

Polymer International

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The optical activity of ten natural-type polymers [poly(a-aminoacids), polysaccharides, proteins and nucleic acids] was measured in solution, as solid powders in suspension, and where possible in the form of films. In some cases the specific rotation of powder samples showed significant differences to the values obtained from solution measurements. The discrepancies seem to reflect the arrangements of polymer chains in supermolecular assemblies in the polymer solid state. K e y words: optical activity, solid-state measurements, natural polymers, suspension, birefringence, isorefractive media.

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Optical activity measurements in solids 5. Optical rotation of natural polymers

Bartus¹,

Vogl²

1994

Polymer International

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Optical activity measurements in solids 7. Polylactides and poly(β‐hydroxybutyrates)

Bartus

Weng

Vogl

1994

Polymer International

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The optical activities of poly‐(R)‐lactide, poly‐(S)‐lactide, poly(β‐hydroxybutyrate) and two β‐hydroxyvalerate copolymers were measured in solution, as solid powders in suspension, and where possible, as films. Poly‐(+)‐3‐methyl‐1‐pentene was also reinvestigated. In some cases the specific rotation values of powder samples showed significant differences from the values of the solution measurements. The discrepancies of the data observed seem to reflect the local environment of the polymer chains in supermolecular assemblies and consequently the solid state structure(morphology)of the polymers. The circular dichroism (CD) spectra of the polymers were also measured in solution and in the form of their films. For comparison, the CD spectra of the naturally occurring protein casein and of the synthetic polypeptide poly‐(L)‐proline were also measured.

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Quantenchemische Untersuchung der Elementarprozesse beim Plasmaätzen im System Fluor/Silizium

Cited by 2 publications

References 6 publications

Optical activity measurements in solids 5. Optical rotation of natural polymers

Optical activity measurements in solids 5. Optical rotation of natural polymers

Optical activity measurements in solids 7. Polylactides and poly(β‐hydroxybutyrates)

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