Thesis (Ph. D.)--Texas State University-San Marcos, 2007. / Vita. Includes bibliographical references (leaves 120-136).

Amostras de água subterrânea provenientes de uma área industrial contaminada por hidrocarbonetos monoaromáticos foram utilizadas para a obtenção de bactérias degradadoras de BTEX (benzeno, tolueno, etilbenzeno e isômeros de xileno), com o intuito de realizar sua identificação, caracterização e avaliação do potencial de degradação. Foram estudados os perfis de crescimento dos consórcios de bactérias enriquecidos em BTEX, isoladamente e com diferentes substratos. Apenas parte das cepas isoladas apresentaram capacidade de crescimento quando expostas individualmente aos compostos em que foram previamente adaptadas. Foram identificadas, por análises de ácidos graxos e seqüenciamento do DNAr 16S, as espécies Stenotrophomonas maltophilia, Serratia marcescens, Burkholderia cepacia, Enterobacter sp., Bacillus cereus e Bacillus tropicalis. / Groundwater samples from an industrial area contaminated with monoaromatic hydrocarbons were used to obtain BTEX (benzene, toluene, ethylbenzene and xylene isomers) degrading bacteria, for the purpose of do their identification, characterization and evaluate their degradation potential. The growth rate of bacterial consortia enriched on BTEX was studied, individually and with different substrates. Just some of the strains isolated showed growth capacity when individually exposed to the compounds in which they were previously adapted. Were identified, by fatty acid analysis and 16S rDNA sequencing, the species Stenotrophomonas maltophilia, Serratia marcescens, Burkholderia cepacia, Enterobacter sp., Bacillus cereus and Bacillus tropicalis.

Transition is a common characteristic of our lives, particularly in a rapidly changing world. In this context, how careers are enacted has become increasingly varied, requiring new conceptual tools to study the transitions of learners and workers. This paper uses theoretical constructs from the literature on boundaryless career discourse as well as learning and on work transitioning in order to explore the learning pathways of environmental engineers. It thus contributes to empirical work that articulates ongoing transitions (beyond the first job) within ‘occupational and organisational life’, as well as to the understanding of learning pathways as educational and occupational progression. The career stories help us to understand how non-linear transitions emerge, the complexity of these transitions, and the need to attend to broader institutional arrangements within and across education and training, the labour market and the workplace. Through its focus on the environmental engineer, it helps us to understand the processes and outcomes of transitions in an important occupation in contemporary professional work in South Africa. Finally, in a field dominated by research on entry into a first job, the paper also provides much-needed insights into occupational transitions into specialised work.

<p>In the early 2000’s scientists noticed an increase in biomass production in the Sahel for the period 1982-2002 (a process which is referred to as ‘greening’). The goal of this thesis was to investigate the greening phenomenon at the local scale in 4 villages in south-central Niger and compare results of the investigation with the already available regional scale studies. Theoretical starting points for this study were: the micro-macro scale paradox in the Sahelian studies and the critical research about ‘received wisdoms’ and environmental narratives of African landscapes. Methods for this study were: visual interpretation of remote sensing data (aerial photographs and satellite images) and collection of farmers’ knowledge during a fieldtrip (PRA and personal interviews). This study identified that greening was not a uniform or strong process in four villages. Greening primarily concerned appearance of new trees, whereas big old trees continued to disappear. Not only rainfall was a reason behind greening, but also human factor played a substantial role. The greening phenomenon should be investigated critically, as far as its meaning for the affected land users is not clear.</p>

In the early 2000’s scientists noticed an increase in biomass production in the Sahel for the period 1982-2002 (a process which is referred to as ‘greening’). The goal of this thesis was to investigate the greening phenomenon at the local scale in 4 villages in south-central Niger and compare results of the investigation with the already available regional scale studies. Theoretical starting points for this study were: the micro-macro scale paradox in the Sahelian studies and the critical research about ‘received wisdoms’ and environmental narratives of African landscapes. Methods for this study were: visual interpretation of remote sensing data (aerial photographs and satellite images) and collection of farmers’ knowledge during a fieldtrip (PRA and personal interviews). This study identified that greening was not a uniform or strong process in four villages. Greening primarily concerned appearance of new trees, whereas big old trees continued to disappear. Not only rainfall was a reason behind greening, but also human factor played a substantial role. The greening phenomenon should be investigated critically, as far as its meaning for the affected land users is not clear.

Diss. Linköping : Univ.

Thesis (Ph.D.)--University of Western Sydney, 2009. / A thesis presented to the University of Western Sydney, College of Arts, in fulfilment of the requirements for the degree of Doctor of Philosophy. Includes bibliographies.

Thesis (MAgric)--University of Stellenbosch, 2006. / Bibliography. Also available via the Internet.

Thesis (PhD)--Montana State University--Bozeman, 2008. / Typescript. Chairperson, Graduate Committee: Lisa J. Rew. Includes bibliographical references (leaves 198-217).

Thesis (M.F.A.)--Rochester Institute of Technology, 2009. / Typescript. Includes bibliographical references (leaf 21).