Sebastian Ehmann's Books

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

By: Sebastian Ehmann

Write a review Read reviews Take a Quiz Solve Book Puzzle

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

By: Sebastian Ehmann

Das Thema dieser Doktorarbeit ist die Reorientierung und Auswertung von vektoriellen Magnetfelddaten, die in zwei Bohrungen während der IODP Expedition 330 zu den Louisville Seamounts aufgezeichnet wurden. Ein Ziel der Expedition war festzustellen, ob sich der Louisville Hotspot relativ zu dem Hawaiian-Emperor Hotspot im Erdmantel bewegt oder ob er stationär ist. Für die Magnetfeldmessungen wurde das Göttinger Bohrlochmagnetometer verwendet, dessen faseroptische Kreisel in der Lage sind, die Drehungen der Sonde im Bohrloch zu bestimmen, wodurch das gemessene Magnetfeld aus dem Bezugssystem der Sonde in das geographische Koordinatensystem reorientiert werden kann. Es werden verschiedene Algorithmen vorgestellt, die auf unterschiedliche Art und Weise die vorhandenen Sensoren kombinieren, um die Daten bestmöglich zu orientieren. Weiterhin werden verschiedene Schichtmodelle verwendet, um die Richtung der Gesteinsmagnetisierung aus den Magnetfelddaten zu bestimmen, wobei auf Uneindeutigkeiten und Messfehler eingegangen wird. Die Ergebnisse dieser Modellierungen unterstützen die Annahme eines stationären Louisville Hotspots.

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

180

Publisher

Cuvillier Verlag

Published Date

ISBN 10

3736984251

ISBN 13

9783736984257

Random Non-Random Periodic Fau

By: M. T. Sebastian,P. Krishna

Write a review Read reviews Take a Quiz Solve Book Puzzle

Random Non-Random Periodic Fau

By: M. T. Sebastian,P. Krishna

This book provides a comprehensive overview of stacking faults in crystal structures. Subjects covered include: notations used in representations of close-packed structures; types of faults; methods of detection and measurement such as X-ray diffraction, electron diffraction and other techniques; theoretical models of non-random faulting during phase transitions; specific examples of - close packed structures including, zinc sulphide, silicon carbide and silver iodide.

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

400

Publisher

Routledge

Published Date

ISBN 10

1351552376

ISBN 13

9781351552370

Synthesis and Analytics of Rigidified Peptide Architectures. Neuropeptide Y Dipeptide Scan Ring-Chain-Equilibria of Iminopeptides Thiazole Amino Acids for Thiopeptide Antibiotics

By: Sebastian Enck

Write a review Read reviews Take a Quiz Solve Book Puzzle

Synthesis and Analytics of Rigidified Peptide Architectures. Neuropeptide Y Dipeptide Scan Ring-Chain-Equilibria of Iminopeptides Thiazole Amino Acids for Thiopeptide Antibiotics

By: Sebastian Enck

The architectures (three-dimensional shapes) of peptides determine their respective biological functions. Therefore, the correct alignment of functionalities in a structure by constraining the flexibility is a key process in evolution as well as in medicinal chemistry in order to increase binding affinity and selectivity. The rigidification of a peptide chain can have local effects (incorporation of the amino acid proline) or it can globally restrain flexibility (macrocyclization). Furthermore, the combination of both strategies has given rise to complex antibiotics with highly optimized modes of action. This work approaches these principles in three topics and for different purposes. The first chapter presents a novel scanning strategy which utilizes synthetic local rigidifications for the evaluation of Neuropeptide Y structure and receptor binding patterns. The fundamental process of macrocyclization is topic of the second chapter. For iminopeptides, ring-chain equilibria can be established and controlled, thereby allowing for the thermodynamic analysis of the ring closure. This leads to the identification of structural determinants that influence the inclination of a peptide chain to close the ring. In the third chapter, a sugarbased synthetic pathway leading to highly functionalized thiazole dipeptides is described. This strategy led to the synthesis of core motivs of complex thiopeptide antibiotics, as well as to diastereomers and homologs thereof.

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

536

Publisher

Logos Verlag Berlin GmbH

Published Date

ISBN 10

3832526129

ISBN 13

9783832526122

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

By: Sebastian Ehmann

Write a review Read reviews Take a Quiz Solve Book Puzzle

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

By: Sebastian Ehmann

Average ratings

N/A

Write a review

Solve jigsaw puzzle

Age

Page Count

180

Publisher

Cuvillier Verlag

Published Date

ISBN 10

3736984251

ISBN 13

9783736984257

Book's by Sebastian Ehmann

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

Random Non-Random Periodic Fau

Random Non-Random Periodic Fau

Synthesis and Analytics of Rigidified Peptide Architectures. Neuropeptide Y Dipeptide Scan Ring-Chain-Equilibria of Iminopeptides Thiazole Amino Acids for Thiopeptide Antibiotics

Synthesis and Analytics of Rigidified Peptide Architectures. Neuropeptide Y Dipeptide Scan Ring-Chain-Equilibria of Iminopeptides Thiazole Amino Acids for Thiopeptide Antibiotics

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

Oriented Magnetic Field Measurements during IODP Expedition 330 to the Louisville Seamount Chain

Username

Password

Username

Password

Password again

Birthday

Email