34366
2014
2014
deu
293 S.
320
doctoralthesis
Kova?
Hamburg
1
--
--
--
Die nachträgliche Sicherungsverwahrung im Jugendstrafrecht
Studein zur Rechtswissenschaft
978-3-8300-7766-4
1435-6821
allegro:1991-2014
10111757
Zugl.: Potsdam, Univ., Diss., 2014
Kerstin Caroll
Bürgerliches Recht
29651
2008
2008
deu
193 S.
doctoralthesis
1
--
--
--
Bewertung der Ernährungssituation jugendlicher Leistungssportler : nutritive und belastungsassoziierte Einflüsse auf ausgewählte Parameter des plasmatischen Redoxstatus
allegro:1991-2014
10105440
Potsdam, Univ., Diss., 2008
Anja Carlsohn
Institut für Ernährungswissenschaft
12119
2006
2006
eng
97 S. : graph. Darst.
doctoralthesis
Potsdam
1
--
--
--
Ontogeny of leptin signalling in the rat hypothalamus: Evidence for selective leptin insensitivity
allegro:1991-2014
10101744
Potsdam, Univ., Diss., 2006
Anne-Sophie Carlo
Institut für Ernährungswissenschaft
Nicht referiert
7530
2014
eng
156
doctoralthesis
1
2015-04-17
--
--
Vegetation and climate change in eastern continental Asia during the last 22 ka inferred from pollen data synthesis
online registration
Potsdam, Univ., Diss., 2014
Xianyong Cao
Geowissenschaften
Institut für Geowissenschaften
Institut für Erd- und Umweltwissenschaften
Universität Potsdam
34192
2014
2014
deu
391 S.
824
doctoralthesis
Nomos Verl.-Ges
Baden-Baden
1
--
--
--
Das vietnamesische Erbrecht im Vergleich zum deutschen Erbrecht
Nomos Universitätsschriten Recht
978-3-8487-0724-9
allegro:1991-2014
10111347
Zugl.: Potsdam, Univ., Diss., 2013
Thanh Clara Cao
Bürgerliches Recht
48376
2020
2020
2020
eng
132
doctoralthesis
1
--
--
2020-10-28
Graphitic carbon nitride and polymer hybrid materials
Advanced hybrid materials are recognized as one of the most significant enablers for new technologies, which holds true especially on the quest for sustainable energy sources and energy production schemes (e.g., semiconductor based photocatalytic materials). Usually, a single component is far from meeting all the demands needed for these advanced applications. Hybrid materials are composed of at least two components commonly an inorganic and an organic material on the molecular level, which feature novel properties exceeding the sum of the individual parts and might be the milestones of next-generation applications. This dissertation aims to provide novel combinations of the metal-free semiconductor graphitic carbon nitride (g-C3N4) with polymers to obtain materials with advanced properties and applications. Visible light constitutes the core of the present work as it is the only energy source utilized either in synthesis or in the application process. In the area of applications by combination of g-C3N4 and polymers, two different hybrids were thoroughly elucidated, i.e.. their design and construction as well as potential application in photocatalysis. Novel soft 3D liquid objects were formed via charge-interaction driven interfacial jamming between polyelectrolytes in aqueous environment and colloidal dispersions of g-C3N4 in edible sunflower oil. As such, stable liquid objects could be molded into specific shapes and utilized for photodegradation of organic dyes in water. Furthermore, the grafting of polymers onto g-C3N4 was investigated. Allyl-end functionalized polymers were grafted onto g-C3N4 by a photoinitiated process to yield g-C3N4 with versatile and improved properties, e.g. advanced dispersibility enabling processing via spin coating. As g-C3N4 produces radicals under visible light irradiation, which is of significant interest for polymer science, g-C3N4 containing polymer latex and macrogel beads (MGB) were synthesized by emulsion photopolymerization and inverse suspension photopolymerization, respectively. A well-controlled emulsion photopolymerization process via g-C3N4 initiation was designed, which features synthesis of well-defined and cross-linked polymer particles. Furthermore, the polymerization process was investigated thoroughly, indicating an ad-layer polymerization in early stages of the process. The utilization of functionalized g-C3N4 allowed the polymerization of various monomer types. Moreover, g-C3N4 was utilized as photoinitiator in hydrogel MGB formation. The formed MGB properties could be tailored via process design, e.g. stirring rate, cross-linker content and g-C3N4 content. Finally, MGBs were introduced as photocatalyst for waste water remediation, i.e. the degradation of Rhodamine B in aqueous solution was studied. The present thesis therefore builds a bridge between g-C3N4 and polymers and provides strategies for hybrid material formation. Furthermore, several potential applications are revealed with significant implications for photocatalysis, polymerization processes and polymer materials.
a promising combination for advanced properties
Dissertation, Universität Potsdam, 2020
Qian Cao
eng
uncontrolled
Graphitic carbon nitride
eng
uncontrolled
Hybrid materials synthesis
eng
uncontrolled
Polymers
eng
uncontrolled
Photopolymerization
Chemie und zugeordnete Wissenschaften
Institut für Chemie
Universität Potsdam
Universität Potsdam
15839
2003
2003
deu
260 S.
3685
doctoralthesis
Lang
Frankfurt am Main
1
--
--
--
Staatsanwaltliche Division im deutschen und spanischen Jugendstrafrecht : eine juristisch-kriminologische Analyse einer speziellen Reaktionsmöglichkeit auf Jugendkriminalität aus rechtsvergleichender Sicht
Europäische Hochschulschriften : Reihe 2, Rechtswissenschaftlen
3-631-51154-x
0531-7312
allegro:1991-2014
10096062
Zugl.: Potsdam, Univ., Diss., 2003
Miguel Angel Cano Panos
Strafrecht
44305
2019
2019
eng
111
doctoralthesis
1
--
--
2019-05-22
Genome and karyotype evolution underlying speciation and diversification of electric organ discharges in African weakly electric fish (Campylomormyrus, Mormyridae, Teleostei)
The African weakly electric fish genus Campylomormyrus is a well-investigated fish group of the species-rich family Mormyridae. They are able to generate species-specific electric organ discharges (EODs) which vary in their waveform characteristics including polarity, phase umber and duration. In mormyrid species EODs are used for communication, species discrimination and mate recognition, and it is thought hat they serve as pre-zygotic isolation mechanism driving sympatric speciation by promoting assortative mating. The EOD diversification, its volutionary effects and the link to species divergence have been examined histologically, behaviorally, and genetically. Molecular analyses are a major tool to identify species and their phenotypic traits by studying the underlying genes. The genetic variability between species further provides information from which evolutionary processes, such as speciation, can be deduced. Hence, the ultimate aim of this study is the investigation of genetic variability within the African weakly electric fish genus Campylomormyrus to better understand their sympatric speciation and comprehend their evolutionary drivers. In order to extend the current knowledge and gain more insights into its species history, karyological and genomic approaches are being pursued considering species differences. Previous studies have shown that species with different EOD duration have specific gene expression patterns and single nucleotide polymorphisms (SNPs). As EODs play a crucial role during the evolution of Campylomormyrus species, the identification of its underlying genes may suggest how the EOD diversity evolved and whether this trait is based on a complex network of genetic processes or is regulated by only a few genes. The results obtained in this study suggest that genes with non-synonymous SNPs, which are exclusive to C. tshokwe with an elongated EOD, have frequent functions ssociated with tissue morphogenesis and transcriptional regulation. Therefore, it is proposed that these processes likely co-determine EOD characteristics of Campylomormyrus species. Furthermore, genome-wide analyses confirm the genetic difference among most Campylomormyrus species. In contrast, the same analyses reveal genetic similarity among individuals of the alces-complex showing different EOD waveforms. It is therefore hypothesized that the low genetic variability and high EOD diversity represents incipient sympatric speciation. The karyological description of a Campylomormyrus species provides crucial information about chromosome number and shapes. Its diploid chromosome number of 2n=48 supports the conservation of this trait within Mormyridae. Differences have been detected in the number of bi-armed chromosomes which is unusually high compared to other mormyrid species. This high amount can be due to chromosome rearrangements which could cause genetic incompatibility and reproductive isolation. Hence an alternative hypothesis regarding processes which cause sympatric speciation is that chromosome differences are involved in the speciation process of Campylomormyrus by acting as postzygotic isolation mechanism. In summary, the karyological and genomic investigations conducted in this study contributed to the increase of knowledge about Campylomormyrus species, to the solution of some existing ambiguities like phylogenetic relationships and to the raising of new hypothesis explaining the sympatric speciation of those African weakly electric fish. This study provides a basis for future genomic research to obtain a complete picture for causes and results of evolutionary processes in Campylomormyrus.
Dissertation, Universiät Potsdam, 2019
Julia Canitz
Tiere (Zoologie)
Institut für Biochemie und Biologie
Universität Potsdam
Universität Potsdam
40348
2017
2017
eng
106
doctoralthesis
1
--
--
--
Elastic interactions between antagonistic molecular motors
online registration
Dissertation, Universität Potsdam, 2017
Mehmet Can Ucar
Physik
Institut für Physik und Astronomie
Universität Potsdam
Universität Potsdam
15364
2004
2004
eng
doctoralthesis
1
--
--
--
Scale dependency in spatial patterns of saturated hydraulic conductivity
This study investigates spatial patterns of Ks and tests the hypothesis of whether structural variance emerges from noise with increasing sampling precision. We analyzed point measurements of Ks along independent transects at sampling intervals of 25, 10, 1 and 0.25 m. The field area is a tropical rainforest catena (i.e. toposequence) characterized by systematic downslope changes in soil properties including color (red to yellow), mineralogy (kaolinite- illite to kaolinite) and texture (sandy clay to sand). Independent tramsects spanning the entire catena at lag intervals of 25 and 10 in reveal little to no spatial patterns in Ks; i.e. scatter plots are noisy and lack apparent spatial trends, and semivariograms suggest little to no autocorrelation in Ks. As sampling precision is increased (h = 1 and 0.25 m), spatial patterns emerge in Ks for the downslope areas, in which distinctive hydraulic boundaries in Ks correlate with relatively small-scale, topography-controlled soils with coarse textures (greater than or equal to 80% sand). For these areas, semivariograms of Ks and those of %sand and %clay exhibit similar spatial structure characterized by small nugget variances and large ranges, and nugget variance is reduced as sampling precision increases from 1 to 0.25 m. In the upslope, clay-rich locations along this toposequence, Ks exhibits few spatial patterns, irrespective of sampling scale. For these locations, scatter plots are noisy without apparent spatial trends, and semivariograms show almost complete nugget variance, suggesting little to no correlation in this hydraulic parameter at any scale. This study suggests that in the absence of coarse textures (greater than or equal to 80% sand), there is little predictability in Ks, even at sampling intervals of 0.25 m. We believe this lack of spatial structure is due to a predominance of small-scale processes such as biological activity that largely control Ks in this forested setting. (C) 2003 Elsevier B.V. All rights reserved
http://www.uni-potsdam.de/u/Geooekologie/download/elsenbeer/publikationen/RG5.pdf
0341-8162
allegro:1991-2014
10098231
Catena : an interdisciplinary journal of soil science, hydrology, geomorphology focusing on geoecology and landscape evolution. - ISSN 0341-8162. - 55 (2004), 1, S. 49 - 77
G. Cameron
J. A. Sobieraj
Helmut Elsenbeer
Referiert
Open Access
Institut für Geographie und Geoökologie
Institut für Geoökologie
Institut für Umweltwissenschaften und Geographie