Inaug.-Diss.--Köln. / Vita. Reprint of typescript, reduced slightly by method of processing, and printed on one side of double leaves, folded once in oriental style. Includes bibliographical references.

Zugl.: Münster (Westfalen), Univ., Diss.

Originally issued as author's thesis, Universidad de Madrid, 1948. / Bibliography: p. [207]-216.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1960. / Typescript. Abstracted in Dissertation abstracts, v. 20 (1960) no. 8, p. 3312. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [348]-362).

Zugl.: Mainz, Univ., überarb. Diplomarbeit, 2007

Thesis (M.A.)--Kutztown State College, 1974. / Source: Masters Abstracts International, Volume: 45-06, page: 2849. Typescript. Includes bibliographical reference (leaf [92]).

Significant discrepancies exist in global estimates of the atmospheric methane (CH4) budget. This is particularly true for tropical South America where bottom-up approaches, rooted in field observation, tend to under estimate atmospheric observations. As such, a better understanding of soil environments, which are capable of acting as both source and sink for atmospheric CH4, is required. Soil-atmosphere CH4 exchange is fundamentally determined by the balance between strictly anaerobic methanogenic and aerobic methanotrophic microbial processes. For this reason, CH4 emissions are typically associated with anoxic wetland soils, whilst, oxic upland soils are thought to uptake CH4 from the atmosphere. However, there is increasing evidence that upland soils may act as sources of CH4 through methanogenic activity within cryptic wetlands or anoxic microsites. This thesis aims to: document soil-atmosphere CH4 fluxes in poorly represented tropical upland and montane ecosystems, investigate controls on CH4 flux with a focus on soil oxygen (O2) concentration and investigate relationships between methanogenic and methanotrophic processes under oxic conditions. These aims are addressed in three chapters focusing on lowland terra firme, premontane and montane forests and montane humid puna grasslands and wetlands along an Amazonian to Andean transect spanning ~ 3300 m of elevation in southeastern Peru. In the lowland rainforest intensive seasonal field campaigns and laboratory incubations were conducted on higher porosity ultisol and lower porosity inceptisol soils. Mean (s.e.) net CH4 fluxes for dry and wet seasons were, respectively, -1.59 (0.06) and - 1.39 (0.07) mg CH4-C m−2 d−1 for the ultisol and -0.95 (0.06) and -0.41 (0.10) mg CH4-C m−2 d−1 for the inceptisol. Greater uptake rates in the ultisol than the inceptisol were best explained by lower water-filled pore space (WFPS). Similarly, WFPS best explained between season variation in net CH4 flux from the inceptisol, whilst, we were unable to explain the smaller variations observed for the ultisol. Methanogenic processes were active in both the ultisol and inceptisol soils despite oxic conditions. In the premontane and montane forests, long-term monthly field measurements were conducted over two and a half years in premontane, lower montane and upper montane settings. Mean (s.e.) net CH4 fluxes for aggregated dry and wet season months were, respectively, -0.20 (0.15) and -0.08 (0.13) mg CH4-C m−2 d−1 for the premontane forest, -1.12 (0.13) and -0.97 (0.11) mg CH4-C m−2 d−1 for the lower montane forest and -1.55 (0.13) and -1.04 (0.11) mg CH4-C m−2 d−1 for the upper montane forest. Increased uptake with elevation was best explained by decreases in WFPS. Significant variation in net CH4 flux between seasons, driven by variation in WFPS, was only identified for the upper montane forest.

Marburg, Univ., Diss., 1998 / Erscheinungsjahr an der Haupttitelstelle: 1997

Geóloga / El Oroclino Boliviano es uno de los rasgos estructurales más notables de los Andes Centrales. Diversos estudios han constatado su historial tectónico, deformación y estrecha relación con las rotaciones tectónicas. A su vez, numerosos estudios paleomagnéticos han permitido documentar un patrón sistemático de rotaciones tectónicas, antihorarias al sur de Perú y horarias al norte de Chile, las cuales habrían ocurrido esencialmente durante el Paleógeno. Estos trabajos se han concentrado, esencialmente, en rocas del Mesozoico y Cenozioco. Hasta el momento no existen, al menos en el norte de Chile, estudios paleomagnéticos recientes, que hallan documentado las propiedades magnéticas de unidades más antiguas (de edad paleozoica o triásica). En consecuencia, al momento, poco se sabe acerca del paleomagnetismo en el basamento Paleozoico-Triásico, su rol en la construcción del Oroclino Boliviano y en el origen de las rotaciones tectónicas. En este contexto, y con la idea de aportar nuevos antecedentes, que permitan acotar la temporalidad y el origen de las rotaciones horarias del norte de Chile, en especial la existencia o ausencia de rotaciones tectónicas en unidades paleozoicas y triásicas, es que en este trabajo, se presentan los resultados de un estudio paleomagnético realizado en 20 sitios que incluyen 181 muestras perforadas y orientadas in situ, en la Formación Tuina (Permo-Triásico) y en ambos flancos del Sinclinal Barros Arana al norte del Salar de Atacama dentro del Grupo Purilactis (Cretácico Superior). Por primera vez, ha sido posible, en esta región, obtener resultados favorables en unidades pertenecientes al basamento, en la parte oriental de la Cordillera de Domeyko (Formación Tuina). Además los resultados obtenidos en este trabajo permiten reconocer, dentro de las muestras pertenecientes tanto a la Formación Tuina como al Grupo Purilactis, el patrón de rotaciones horarias descrito en trabajos anteriores. Además, 3 sitios de la Formación Tuina, más uno del miembro inferior del Grupo Purilactis (Formación Tonel), que sobreyace a los anteriores, registran rotaciones horarias que van entre los 57 a los 79° que son atribuidas a tectónica transpresiva local. A su vez, es posible descartar rotaciones significativas previas a las de edad paleógena que hayan afectado tanto a la Formación Tuina como al Grupo Purilactis. En consecuencia, es posible inferir que las faces tectónicas Peruana y K-T no habrían producido rotaciones tectónicas significativas en el área.

This dissertation explored visual representations of death in the photographic work of Andres Serrano and Joel-Peter Witkin, as well as the MAFA candidate's (David Buchler) own art practice. It looked at historical overviews of representations of death from the Middle Ages to present, as a means of contextualising and locating the reasons as to how images came to be the way they are in the present. Selected artworks were examined with particular theoretical reference to Phillipe Ariès' investigation into the changing attitudes towards death in Western society and Julia Kristeva's abjection theory. This dissertation focuses on the abjection of death and more specifically the corpse and the treatment of it in the work of Serrano and Witkin. This project explored some of the reasons why the images in this dissertation may be seen as disturbing and confrontational. / Thesis (M.A.)-University of KwaZulu-Natal, Pietermaritzburg, 2010.