Heat induced denaturation of fibrous hard alpha-keratins and their reaction with various chemical reagents [Elektronische Ressource] / Daniel Vasilica Istrate

Dan Andersson

Informations

• Publié par: rheinisch-westfalischen_technischen_hochschule_-rwth-_aachen
• Publié le: 01 janvier 2011
• Nombre de lectures: 73
• Langue: English
• Poids de l'ouvrage: 3 Mo

Extrait

Heat induced denaturation of fibrous hard
α-keratins and their reaction with various
chemical reagents


Von der Fakultät für Mathematik, Informatik und
Naturwissenschaften der RWTH Aachen University zur
Erlangung des akademischen Grades eines Doktors der
Naturwissenschaften genehmigte Dissertation

vorgelegt von

Diplom-Ingenieur
Daniel-Vasilica Istrate
aus Iasi, Rumänien


Berichter: Universitätsprofessor Dr. rer. nat. Martin Möller
Universitätsprofessor Dr. rer. nat. Walter Richtering



Tag der mündlichen Prüfung: 20. Juni 2011
Diese Dissertation ist auf den Internetseiten der Hochschulbibliothek online verfügbar.


Acknowledgements

First of all I would like to thank Prof. Dr. Martin Möller, Director of the DWI who
honoured me by accepting my PhD study under his coordination. I am greatly indebted to him
for giving me the opportunity to do the PhD thesis on a topic of such a great actual interest and
also for his support and innovative ideas that contributed essentially to the success of this
project.
I would like to express my deep gratitude to Prof. Dr. Crisan Popescu for the enlightening
and stimulating dialogue throughout the all years of my PhD study, for the permanent
encouragement and warm support. This thesis would hardly have become possible without his
critical and creative discussions.
I am furthermore indebted to Professor Franz-Josef Wortmann from School of Materials
Manchester for his contribution to the initiation and development of this project, as DWI
member.
I gratefully acknowledge the financial support and the prolific exchange of ideas during the
development of this project from Beiersdorf AG, CIBA Spezialitaetenchemie Grenzach GmbH,
COGNIS GmbH, HENKEL AG & Co. KGaA, KPSS-KAO Professional Salon Services GmbH
and WELLA Services GmbH through the German cosmetic industry committee ―DSC of Human
Hair‖.
In great recognition of his service in performing amino acid analyses I am deeply grateful
to Dr. Josef Föhles.
My thanks go also to Dr. Er Rafik Meriem for the scientific discussions and help, for
sharing her knowledge with me regarding the X-ray analyses involved in this work. Moreover, I
would like to thank Dr. Hô Phan and Franz Steffens for preparing the electron microscopic
pictures.
I am filled with a deep sense of gratitude to my beloved wife, Monica. I would like to
thank her, beside for the outstanding support and valuable advices regarding the tensile
properties experiments, for her tremendous confidence and for her special way of making come
to light the best of myself.
To come so far was also the merit of the wonderful professors I had the chance to work Aknowledgements
with during my study at the Faculty of Textiles and Leather Engineering from the University
―Gh. Asachi‖, Iasi, Romania. My greatest appreciation and thanks go to Conf. dr. ing. Radu
Cezar Doru. Very grateful I am to Prof. dr. ing. Mureşan Augustin. I owe also enormously to all
members of the Textile Chemical Technology Department.
Last but not least, I am thankful to all former and present colleagues from DWI and
especially from the joint groups of Prof. Dr. Crisan Popescu, for the nice atmosphere and for the
time we spent together.
Though, many have not been mentioned, none is forgotten.



























To Monica

List of Publications

Parts of this thesis are published, in preparation to be published or presented at
conferences:

Articles D. Istrate, C. Popescu, M. Möller, Nonisothermal kinetics of hard α-keratin
thermal denaturation, Macromolecular Bioscience, Volume 9, Issue 8, p 805-812,
2009

D. Istrate, C. Popescu, M. Er Rafik, M. Möller, Thermal denaturation of fibrous
hard α-keratins and the effect of pH, Polymer Degradation and Stability,
submitted 2010

D. Istrate, C. Popescu, F.-J. Wortmann, M. Möller, Micro-tubes of keratin. The
thermal stability of cortex and cuticle, Biomacromolecules, submitted 2010

D. Istrate, C. Popescu, M. Er Rafik, M. Möller, Differential scanning calorimetry
(DSC) analysis of structural changes in bleached, perm-waved and dyed hard
alpha-keratin fibres, Journal of the Society of Cosmetic Chemists, submitted 2009

M. Baias, D.E. Demco, D. Istrate, C. Popescu, B. Blümich, M. Möller,
Morphology and molecular mobility of fibrous hard α-keratins by 1H, 13C, and
129Xe NMR, The Journal of Physical Chemistry B, 113 (35), p 12136–12147,
2009

Posters D. Istrate, C. Popescu, Investigations by Differential Scanning Calorimetry of the
effects of hair bleaching on the main morphological components of human hair,
DWI Reports 130, P14 (2006)

M. Er Rafik, D. Istrate, C. Popescu, Behaviour of human hair at various
temperatures, TRI/Princeton Hair Conference 2006

M. Baias, D. Istrate, C. Popescu, D. E. Demco, M. Möller, B. Blümich, Thermal
denaturation of keratin by 1H solid-state NMR, Aachen Dresden International
Textile Conference, Aachen, Germany, November 2007