PhD theses

All Wageningen University PhD theses

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    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012

     

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    We will mail you new results for this query: (dissertatie/nummer=* AND publication year==2006)
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Organic nitrogen uptake and endophytic, mutualistic fungi in Dutch heathland ecosystems [PhD thesis]
Zijlstra, J. \ 2006
nitrogen - heathlands - cycling - mineralization - tannins - ericaceae - deschampsia flexuosa - mycorrhizal fungi - calluna vulgaris - deposition - endophytes - netherlands - natural areas
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Fingerponds: seasonal integrated aquaculture in East African freshwater wetlands : exploring their potential for wise use strategies [PhD thesis]
Kipkemboi, J. \ 2006
aquaculture - fish culture - fish ponds - wetlands - small farms - environmental impact - subsistence - sustainability - kenya - integrated farming systems - livelihood strategies
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The politics of policy : participatory irrigation management in Andhra Pradesh [PhD thesis]
Nikku, B.R. \ 2006
irrigation - management - participative management - politics - policy - andhra pradesh - india
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Modernization and the evolution of irrigation practices in the Rio Dulce Irrigation Project, Santiago del Estero, Argentina : una tarea de todos [PhD thesis]
Prieto, D. \ 2006
irrigation systems - practice - modernization - evolution - argentina
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Reforms in turbulent times : a study on the theory and practice of three irrigation management policy reform models in Mashonaland, Zimbabwe [PhD thesis]
Zawe, C. \ 2006
irrigation - management - zimbabwe - policy - agrarian reform - theory - practice

Abstract:
This thesis focuses on smallholder Irrigation Management Reform (IMR) policy models implemented in Mashonaland West and Mashonaland Central provinces of Zimbabwe. In particular it is concerned with how the models were negotiated, recursively shaped, adopted, transformed and accepted into policy by an array of actors spanning across international funding agencies, government ministries, local agencies responsible for smallholder irrigation development, the irrigators and their surrounding communities. The thesis intends to add to the growing body of debate on IMRs by providing information on ‘the reform process,’ an aspect that has been underplayed so far. It also aims to contribute to the development of an irrigation management policy for the smallholder irrigation sector in Zimbabwe that has been lacking to date.

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The dynamics of shoreline wetlands and sediments of northern Lake Victoria [PhD thesis]
Azza, N. \ 2006
wetlands - lakes - mangroves - sediment - east africa - change - shores

Abstract:
cum laude graduation (with distinction)

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Water, stakeholders and common ground : challenges for multi-stakeholder platforms in water resource management in South Africa [PhD thesis]
Simpungwe, E. \ 2006
water management - water policy - water supply - water quality - water resources - natural resources - floods - disasters - participation - south africa
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Fingerponds: managing nutrients and primary productivity for enhanced fish production in Lake Victoria's wetlands, Uganda [PhD thesis]
Kaggwa, R.S. \ 2006
aquaculture - fish culture - fish ponds - wetlands - small farms - nutrients - manures - sustainability - fish production - uganda - integrated farming systems - livelihood strategies
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Natural mating in Nile tilapia (Oreochromis niloticus L.) : implications for reproductive success, inbreeding and cannibalism [PhD thesis]
Fessehaye, Y. \ 2006
oreochromis niloticus - tilapia - natural mating - reproductive efficiency - inbreeding - cannibalism - genetic improvement - fish culture
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Function-structure relationships of acetylated pea starches [PhD thesis]
Huang, J. \ 2006
peas - starch - acetylation - physicochemical properties - characterization - structure activity relationships

Abstract:
Cowpea, chickpea and yellow pea starches were studied and the results showed that their properties were strongly related to the chemical fine structures of the starches. Furthermore, granular starches were modified using two types of chemical acetylation reagents and then separated into different size fractions. The amount of introduced acetyl groups was found to depend on the size of the granules for the reaction with rapidly reacting reagent acetic acid anhydride, whereas the amount of introduced acetyl groups was independent from the granule size for reaction with the slowly reacting reagent vinyl acetate. Modification with the two types of reagents resulted in significant difference in physical properties of the starches. The investigation on the chemical fine structure of modified starches suggested that the distribution of acetyl groups over both the amylose and amylopectin populations of the starches was different, not only at molecular level but also at granular level.

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Comparative genomics of the relationship between gene structure and expression [PhD thesis]
Ren, X.Y. \ 2006
gene expression - bioinformatics - molecular genetics - dna sequencing - genomics
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Van oude dingen, de mensen, die voorbij gaan... : over de voorwaarden meer recht te kunnen doen aan de door burgers gewaardeerde cultuurhistories [PhD thesis]
Duineveld, M. \ 2006
landscape - archaeology - cultural heritage - heritage areas - ecology - policy - experts - government policy - netherlands - cultural landscape

Abstract:
Duineveld beargumenteert dat als de Nederlandse overheid haar cultuurhistorisch beleid wil democratiseren daarvoor meer openheid moet worden gecreëerd in het formele beleidsysteem

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Agriculture, resource management and institutions : a socioeconomic analysis of households in Tigray, Ethiopia [PhD thesis]
Tesfay, G. \ 2006
economic development - rural development - agriculture - resource management - socioeconomics - natural resources - productivity - land management - metayage - tenure systems - sustainability - ethiopia - institutional economics
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On the role of feral ruminants in the transmission of bovine herpesvirus 1 to domestic cattle [PhD thesis]
Mollema, E. \ 2006
bovine herpesvirus 1 - cattle - domestic animals - ruminants - feral herds - disease transmission - disease control - persistence - vaccination - disease models - epidemiology - nature reserves - netherlands
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Simulation and analysis of FRET in the study of membrane proteins [PhD thesis]
Nazarov, P.V. \ 2006
surface proteins - fluorescence emission spectroscopy - energy exchange - neural networks - bacteriophages
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Anemia among school children in Vietnam: the efficacy of iron fortification [PhD thesis]
Le, H.T. \ 2006
anaemia - iron deficiency anaemia - iron - fortification - nutritional state - school children - vietnam - supplementary feeding

Abstract:
The present thesis aimed to determine the efficacy of a school-based food fortification program to improve hemoglobin concentrations and iron stores of intestinal parasites-prone school children. Furthermore this thesis also compares the effect of iron fortification and iron supplementation on the changes in hemoglobin and iron status.

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Identification and characterization of some Aspergillus pectinolytic glycoside hydrolases [PhD thesis]
Zandleven, J.S. \ 2006
polygalacturonase - pectins - cell wall components - aspergillus niger - microbial degradation - arabidopsis thaliana
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Land rental market and off-farm employment: rural households in Jiangxi Province, P.R. China [PhD thesis]
Feng, S. \ 2006
economic development - rural development - agricultural households - land markets - rent - tenure systems - ground rent - labour market - agricultural economics - off-farm employment - china
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Interrelated modeling of land use and habitat for the design of an ecological corridor : a case study in the Yungas, Argentina [PhD thesis]
Somma, D.J. \ 2006
land use - habitats - physical planning - nature conservation - argentina - ecological network - habitat fragmentation

Abstract:
This thesis aims at developing tools to mitigate the process of natural habitat fragmentation related to deforestation, which is becoming a crucial conservation issue in the Yungas, a mountain subtropical forest in the northwest of Argentina. The conservation of forest connections among protected areas is one of the principal targets of nature conservation action in the region, and therefore a major objective of our development. A multi-temporal approach to analyze the evolution of the land use and cover change (LUCC) is proposed. A spatially explicit quantitative analysis of the historical sequence of deforestation for the period 1973 - 2000 is presented. In this period, 80,000 ha have been deforested. This gives an actual indication of the intensity of the conversion of native forest into farmland (farmland area increased from 5 % to 11 % of the total region). A conceptual model depicting the main driving forces interacting from global to local level is formulated. A logistic regression analysis allowed the identification of the spatial determinants (as local proximate variables) for the location of possible future changes in land use. These variables (soil classes, accessibility, slope) were integrated using a GIS procedure that produced a LUCC probability spatial model. This has the principal purpose of predicting the location of future clearings.

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Barley-Puccinia rusts: a model system to study the genetics, evolution and mechanisms of nonhost immunity in plants [PhD thesis]
Jafary, H. \ 2006
hordeum vulgare - barley - puccinia - rust diseases - disease resistance - plant breeding - host parasite relationships - genetics - evolution - models
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