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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Hand-built Ceramics at 810 Royal and Intercultural Trade in French Colonial New Orleans

Trahan, Travis M 05 August 2019 (has links)
While trade relations between French colonists and indigenous peoples in New Orleans are well documented, there have been few in depth studies utilizing archaeological sites in the city to illuminate the ways in which such relations shaped the day to day lives of the peoples involved. This work has attempted to elucidate trade practices between these groups by utilizing archaeological data uncovered at 810 Royal Street during excavations from 2015 through 2018. A collection of hand-built ceramics typically associated with indigenous peoples found in French colonial contexts on the site may help explicate the nature of trade occurring within the city and the ways in which this trade was reflective of larger patterns of urban colonial adaptation and creolization. This work seeks to illuminate the motivations behind such trade and the ways in which economic motives and individual self-interests drove colonists to undermine the original French designs for the city.
2

Optimierung der Glaswollefiltration von menschlichen Ejakulaten zum Zwecke der assistierten Reproduktion für labordiagnostische Untersuchungen

Weber, Holm 01 April 1999 (has links)
Mittels Glaswolle (Microfibre code 112) in einer speziellen Filtrations-Anordnung steht ein effektives Spermienpräparationsverfahren zur Verfügung. Durch Ausnutzung eines gefäßforminduzierten Konzentrierungseffektes kann auf samenzellschädigende Zentrifugation zur Spermatozoen-Anreicherung verzichtet werden. Folgend aufgeführte Ergebnisse sind Mittelwerte aus 30 Messungen. Die Computer-Assistierte Spermienmotilitäts-Analyse (CASA) zeigt eine gegenüber dem nativen Ejakulat signifikante Erhöhung der Spermienkonzentration im Filtrat (27,45 vs. 69,56 Mio/ml). Das Verteilungsverhältnis der Samenzell-Populationen nach Glaswolle- Filtration bietet gute Voraussetzungen für assistierte Reproduktion. Unter Abnahme des immotilen Anteils auf 1/5 (54,53 vs. 11,66 %), erhöht sich konsekutiv der motile Spermien-Anteil (39,53 vs. 82,06 %). In der weiteren Spezifisierung motiler Spermatozoen, kann eine Verschiebung zugunsten linear motiler Spermien registriert werden. Während die Verringerung der nicht linear motilen Subpopulation nur zufälligen Charakters ist, weist der Kreisläuferanteil post filtrationem einen signifikanten Rückgang auf (34,96 vs. 31,1 %). Der Zuwachs linear motiler Samenzellen ist jedoch von besonderem Interesse (7,36 vs. 12,43 %). Bei Zugrundelegung von Absolut- zahlenwerten, läßt sich (auch für oligozoosperme Ejakulate) ein nahezu 9-facher Anstieg linear motiler Spermatozoen von nativ 0,8 auf 7,1 Mio/ml nach Filtration demonstrieren. Ihre Spurgeschwindigkeit (curvilinear velocity-VCL) nimmt dabei überproportional zu (41,26 vs. 62,66 µm/s), während sich über alle motilen Spermien im Mittel nur eine filtrationsbedingte VCL-Erhöhung von 10 µm/s abzeichnet. Weiterhin kam ein Cell Counter + Analyser System (CASY®) zum Einsatz, das ein Verfahren der Partikelmeßtechnik nutzt. So gelang der Nachweis, daß die Glaswolle-Filtration unter Reduktion klein- und großkorpuskulärer Bestandteile (zelluläre und nichtzelluläre) eine deutliche Anreicherung einer Samenzell-Population mit medianen Membrandurchmesser von 3,47 µm bewirkt. Die Ergebnisse der morphologischen Differenzierung (strict criteria) stehen damit im Einklang. Nach Filtration konnte eine signifikante Zunahme der Normalform (13,33 vs. 19,16 %) bei adäquater Verminderung von Makro- und Mikroköpfen (6,5 vs. 3,03 %) sowie Vorstufen (8,33 vs. 5,96 %) registriert werden. Auf den raster-elektronen-mikroskopischen Aufnahmen wird deutlich, wie besonders membrandefekte Spermatozoen und muköses Eiweiß der Glaswolle-Faseroberfläche verhaften. / An efficient procedure for sperm preparation is presented using glass wool (microfibre code 112) in a special filter arrangement. Centrifugation as a means of spermatozoa concentration, a process which is extremely harmful to the sperm cells, can be dispensed with by making use of a concentration effect induced by the form of the vessel. The results that follow are mean values from 30 measurements. Computer-Assisted Sperm-motility Analysis (CASA) shows a significant rise of the sperm cell contents in the filtrate (27,45 vs. 69,56 million/ml) as compared with the native ejaculate. The distribution ratio of sperm populations observed after glass wool filtration provides favourable conditions for assisted reproduction. Reduction of the immotile portion to one fifth (54,53 vs. 11,66 %) yields a consecutive rise of the portion of motile sperms (39,53 vs. 82,06 %). Further specification of motile spermatozoa shows a shift in favour of sperms moving in a straight line. The decrease of the portion moving in circles is significant (34,96 vs. 31,1 %) after filtration, whereas the reduction in the subpopulation of sperms not moving in a straight line is of a rather incidental nature. Of particular interest, however, is the increase in sperm cells moving in straight lines (7,36 vs. 12,43 %). Basing considerations on absolute figures , a nine-fold increase in spermatozoa moving in straight lines, from the native value of 0,8 to 7,1 million/ml, can be demonstrated (even for oligozoospermial ejaculates) after filtration. Their curvilinear velocity (VCL) rises, in this connection, to a disproportionately high degree (41,26 vs. 62,66 µm/sec), whereas a filtration-induced rise of the VCL by only 10 µm/sec is observed for all motile spermatozoa on the average. Furthermore, a Cell Counter + Analyser System (CASY®) was employed making use of a particle test procedure. In this way, it could be proved that glass wool filtration produces a marked enrichment in a population of sperm cells with a mean membrane diameter of 3,47 µm with simultaneous reduction of the small- and large-corpuscular (cellular and non-cellular) fractions. In keeping with this are the results of the morphological differentiation (strict criteria). A significant increase in the standard form (13,33 vs. 19,16 %) with an adequate reduction in macro and micro heads (6,5 vs. 3,03 %) as well as in prestages (8,33 vs. 5,96 %) could be observed after filtration. Pictures taken with the electron-scan microscope clearly show that spermatozoa presenting membrane defects as well as mucous proteins, in particular, attach to the glass wool fibre surface.
3

Pottery Exchange and Interaction at the Crystal River Site (8CI1), Florida

Kemp, Kassie Christine 29 October 2015 (has links)
The Crystal River site (8CI1) is a Woodland-period mound (ca. 1000 BC to AD 1050) complex located on the west-central Gulf coast of Florida. Links to the Hopewell Interaction Sphere suggest that the people of Crystal River had connections with a broad range of communities, yet little is known concerning the role the site played in local, regional, or long-distance exchange networks. Pottery traditions vary amongst different communities of practice, therefore the level of interaction at Crystal River can be measured by looking at variation in the ceramic assemblage. I combine type/attribute, vessel form and function, gross paste, and chemical analyses to determine the amount of variability present in the pottery assemblage. These analyses show that Crystal River has a high level of ceramic variation with some spatial and temporal patterning. To determine Crystal River’s membership in and potential role within a sphere of interaction, I compare these patterns to three community types with diverse social interfaces. This research suggests that Crystal River may have started out as a homogenous, residential community but through time began to interact with a number of diverse, regionally associated communities drawn to the site for special occasions.

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