Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 530 for “"apical"”.
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Protein sorting to the apical membrane of epithelial cells
… along pathways that deliver proteins to the apical membrane of polarised cells. Based on this, the aim of this work was to contribute to the understanding of apical sorting in epithelial cells. The study of how lipid rafts are structured has been hampered by the scarcity of techniques for …
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Organization and formation of the apical membrane of epithelial cells
… of cell membranes, in particular of the apical membrane of columnar epithelia, is the topic of this thesis. The first part characterizes the apical membrane and its specialized organization and morphology, whereas the second part focuses on the formation of this unique plasma membrane …
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Factors Associated with Orthodontically Induced Apical Root Resorption of Maxillary Incisors
… that are widely accepted as responsible for apical root resorption (RR), such as heavy compressive forces on the periodontal ligament (PDL). Unfortunately, it is still largely unpredictable if one patient will experience more root loss than what is considered normal. Thus, it is of clinical …
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Rab35 Centered Membrane Trafficking Pathway Directs Apical Constriction During Drosophila Gastrulation
… mesoderm is driven by the pulsed constriction of apical surfaces. Here, we address the mechanisms by which the irreversibility of pulsed events is achieved while also permitting uniform epithelial behaviors to emerge. We use MSD-based analyses to identify contractile steps and find that when a …
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Agronomic management of soybean with foliar manganese and apical meristem alterations
… in 2015 evaluated alternative practices to break apical dominance in soybean in order to facilitate plant branching or create multiple new main stems to potentially increase yield. Practices to eliminate the plant apical meristem included applying the herbicide Cobra …
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Evaluation of Apical, Coronal and Occlusal Form Diffrences with Conventional Orthodontic Treatment
… The objective of this study was to determine how apical, coronal and occlusal arch forms change following orthodontic treatment with fixed appliances and to establish a base for future studies. Material and Methods: Maxillary and mandibular apical, coronal and occlusal landmarks of 27 subjects …
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Molecular organization of the actin cortex in apical constriction and epithelial folding
… nonmuscle contraction by demonstrating that the apical actin cortex and associated proteins are spatially organized in epithelia. In addition, I demonstrate that this spatial organization forms a sarcomere-like actomyosin apparatus, which is essential for epithelial contractility. This updated …
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Cochlear morphology and sound-induced motion of the apical mammalian inner ear
… pigs, as well as the acoustic response of the apical turn of in vitro and in vivo apical mammalian cochleae to low frequency (100 to 1000 Hz) sounds - frequencies that are critical to our understanding of speech.
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Apical Testis Structure and the Effects of Cadmium Treatment on Spermatogenesis in Drosophila
… fasciclin-positive zone that fills the apical end of the testis. The first aim of the current work was to characterize the stem cell niche in two additional species based on their evolutionary relationship to <em>D. melanogaster</em> and <em>D. pseudoobscura</em>: <em>D. ananassae</em> …
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The localisation and role of Sidekick at apical vertices in Drosophila epithelial morphogenesis
… Together, my work shows that Sidekick at apical vertices is a novel regulator of epithelial morphogenesis.
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COMPARATIVE ULTRASTRUCTURE OF APICAL CELLS AND DERIVATIVES IN BRYOPHYTES, WITH SPECIAL REFERENCE TO PLASMODESMATA
… (PD) density in three mosses and four liverwort apical cells (AC) and immediate derivatives. The three mosses have tetrahedral apical cells and the liverworts possess tetrahedral, hemidiscoid and lenticular AC geometries. The primary cell wall in the studied taxa is comprised of two layers. A …
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Calcium transport in fish intestine: calcium entry across the apical membrane of the enterocyte
Contains fulltext : mmubn000001_19804481x.pdf (Publisher’s version ) (Open Access)
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Understanding the evolution of the apical organ in the early branching metazoan, Nematostella vectensis
The apical organ is a key sensory structure in marine invertebrate larvae that is involved in sensory processing and neural coordination, thereby influencing larval locomotion, settlement, and metamorphosis. This thesis explores the evolution, development, and function of the apical organ and wider …
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Optical imaging of dendritic spikes in apical oblique dendrites of layer 5 pyramidal neurons
… of information about cortical processing in apical tuft and basal dendrites, the functional role of apical oblique dendrites of layer 5 pyramidal neurons (L5PNs) are less understood. In this thesis, I aim to understand to functional role of thin apical oblique dendrites of L5PNs in the …
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Optical imaging of dendritic spikes in apical oblique dendrites of layer 5 pyramidal neurons
… of information about cortical processing in apical tuft and basal dendrites, the functional role of apical oblique dendrites of layer 5 pyramidal neurons (L5PNs) are less understood. In this thesis, I aim to understand to functional role of thin apical oblique dendrites of L5PNs in the …
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Design, modeling, and validation of an apical flow Transwell insert for small intestinal models
… validation of a device that allows for apical flow over an in 'vitro small intestine model. The device is designed to interface with commercially available hanging Transwells. Design considerations and specifications are discussed, based on user considerations, mechanical requirements, …
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The Manipulation Of Apical Dendritic Plasticity And The Consequences For The Effects of Chronic Stress
<p>Pyramidal cell apical dendrites in region CA3 of the hippocampus of male rats collapse in size and complexity following chronic stress. These dendrites return to control sizes with a recovery period. This suggests that dendritic remodeling can function as a protective response mechanism, …
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Calcium-dependent changes of apical membrane sodium channel density and open probability in frog skin
… noise analysis of Na$\sp{+}$ channels at apical membranes of intact and isolated epithelia of frog skin was carried out to investigate whether treatment of tissues with ionomycin, quinine, or acidification of basolateral solution shared similar mechanisms of inhibition of Na$\sp{+}$ …
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Needleless shoots and loss of apical dominance in greenhouse-grown loblolly pine (Pinus taeda L.)
… growth abnormalities in the form of multiple apical and needleless shoots. Seedlings that exhibit growth abnormalities are of questionable value in the evaluation of progeny tests. The use growth data from this seedling material could result in biased and erroneous or invalid conclusions about …
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The Effect of Chlorhexidine Gluconate as an Endodontic Irrigant on the Apical Seal: Long-term Results
… endodontic irrigating solution would affect the apical seal of three root canal cements. One hundred extracted human single-canal teeth were divided into 9 experimental groups of 10 teeth each, in addition to a positive and negative control group of 5 teeth each. The teeth were decoronated at the …
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