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Phylogeny and evolution of the epiphytic Rhipsalideae (Cactaceae)
(2012-01-11)Cactaceae are one of the major floristic components of the New World’s arid as well as seasonally moist tropical regions and at the same time one of the most popular plant families in horticulture. The taxonomic units ... -
Phylogeny of Echiura (Annelida, Polychaeta) inferred from morphological and molecular data-implications for character evolution
(2012-09-14)Contrary to echiuran monophyly, which is unambiguously supported by several autapomorphies, echiuran phylogenetic intra-relationships are still unknown to date. In order to contribute to a clarification this thesis ... -
Phylogeny, Biogeography and Systematics of Loasaceae subfam. Loasoideae
(2019-02-01)Loasaceae subfam. Loasoideae is a mostly South American group of angiosperms that reaches its highest diversity in the Andean mountain ranges but also extends into Central America, Africa and Oceania. Although some molecular ... -
Phylogeography of the Komodo monitor Varanus komodoensis (Reptilia: Varanidae) inferred from mitochondrial DNA Control Region I and the implications for in situ management plans
(2011-03-16)The Komodo monitor (<i>Varanus</i> <i>komodoensis</i>) is the largest living lizard in the world, which was discovered by scientists only about one hundred years ago. The wild populations of the Komodo monitor are restricted ... -
Physical activity and fitness for healthy ageing
(2024-02-19)The proportion of individuals suffering from age-associated noncommunicable diseases is expected to rise rapidly in the next decades. To maintain health, well-being and socioeconomic stability in an ageing society, identifying ... -
The physical and chemical conditions of molecular clouds on large scales
(2021-09-15)Observations of molecular emission lines in the radio and (sub)millimetre wavelength regime provide insights into the interiors of molecular clouds which are inaccessible by other forms of radiation. Examining the physical ... -
Physical and Chemical Properties of Protocluster Clumps and Massive Young Stellar Objects Associated to Infrared Dark Clouds
(2012-08-10)The study of high-mass stars is important not only because of the effects they produce in their environment through outflows, expanding HII regions, stellar winds, and eventually supernova shock waves, but also because ... -
Physical Initialisation of Precipitation in a Mesoscale Numerical Weather Forecast Model
(2010-03-03)Short term quantitative precipitation forecast (QPF) is an important task for numerical weather prediction (NWP) models, particularly in summer. The increase of model resolution requires the understanding of the initiation ... -
Physical processes behind the periodic radio and gamma-ray emission from the X-ray binary LS I +61°303
(2016-07-21)X-ray binaries are binary stars composed of a normal star and a compact object which, via Roche-lobe overflow or wind accretion, accretes matter from the companion. X-ray emission from these objects can be either thermal ... -
The Physical Properties of Intermediate-Velocity Gas at High Galactic Latitudes
(2016-07-26)The accretion of matter onto galactic disks, the formation of molecular clouds, and the formation of stars are of major importance for the evolution of galaxies over cosmic times. During their lifetimes, high-mass stars ... -
Physically Based Modeling of Micro-Appearance
(2023-07-11)This dissertation addresses the challenges of creating photorealistic images by focusing on generating and rendering microscale details and irregularities, because a lack of such imperfections is usually the key aspect of ... -
Physicochemical Analysis of Bacterial and Firefly Bioluminescence
(2013-10-17)The light emitting reaction of bioluminescence is one of the most visible processes in nature. The present work provides new significant information about the bioluminescent reaction in bacteria. A radical intermediate ... -
The Physics and Chemistry of Oxygen-rich Circumstellar Envelopes as Traced by Simple Molecules
(2018-04-17)The physics and chemistry of the circumstellar envelopes (CSEs) of evolved stars are not fully understood despite decades of research. This thesis addresses two issues in the study of the CSEs of oxygen-rich (O-rich) evolved ... -
Physikochemische und biochemische Mechanismen in der Plasmamembran zur Kontrolle des Clusterverhaltens des T-Zell-Rezeptors
(2014-02-26)Die Plasmamembran als Vermittlerin zwischen Zellinnerem und umgebender Umwelt ist eine wichtige Struktur der Zelle, deren Organisationsprinzipien nur ansatzweise verstanden sind. Membranproteine erfüllen essentielle Aufgaben ... -
Physiological and Molecular Characterization of Kenyan Barley Lines (Hordeum vulgare L.) for Abiotic Stress Tolerance and Malting Attributes
(2016-01-11)Abiotic stresses such as drought, salinity agriculturally poor soils, and inappropriate fertilizer usage as factors of production determining yield and quality of barley for various end uses challenges the production of ... -
Physiological and molecular studies of different aldehyde dehydrogenase (ALDH) genes in response to high temperature and functional analyses of the ALDH7B4 promoter in Arabidopsis thaliana
(2017-04-06)In this study, the function of aldehyde dehydrogenase (<i>ALDH</i>) genes in response to heat stress alone and in combination with dehydration, salinity, or wounding stress was investigated using selected <i>ALDH</i> genes ... -
Physiological role of cation channels of P. irradians ciliary photoreceptors and human sperm
(2017-04-07)Eukaryotic flagella and cilia are antenna-like cellular extrusions, shaped by microtubules and covered by a specialized extension of the plasma membrane. They serve several tasks, like light and olfactory sensation or cell ... -
Physiological, biochemical and molecular responses of different barley varieties to drought and salinity
(2018-03-02)Barley (Hordeum vulgare) is an important member of grass family Poaceae. Among various agricultural crops, barley is considered a model plant due to its important features like short season, tolerance to abiotic stress, ... -
Phytochemical and analytical studies of feed and medicinal plants in relation to the presence of toxic pyrrolizidine alkaloids
(2013-10-28)Pyrrolizidine alkaloids (PAs) are wide-spread in the plant kingdom; they are present in approximately 3 % of all flowering plants. Unsaturated PAs possess hepatotoxic, carcinogenic, genotoxic, teratogenic properties.<br ... -
Phytol and Tocopherol Metabolism in Arabidopsis thaliana
(2015-12-04)The ability of a plant to convert light energy into chemical energy relies on the integrity and functionality of the photosynthetic membranes of the chloroplasts. Chlorophyll is one of the key players in photosynthesis as ...
