Scriptiebank overzicht

Het traditionele lineaire model in de bouwsector heeft een aanzienlijke ecologische impact door grondstoffenontginning en afvalproductie. Hergebruik van bouwmaterialen kan deze impact verminderen, maar de kosten-effectiviteit is twijfelachtig. Deze masterproef onderzoekt welke materialen rendabel kunnen worden hergebruikt door een een kosten-batenanalyse uit te voeren op de materialen van de lbSN-woning van BLAF architecten. De woning wordt gedemonteerd en heropgebouwd bij de Verbeke Foundation. De analyse vergelijkt de kosten van demontage en verwerking met de prijzen van nieuwe materialen en die op de hergebruikmarkt. De nodige gegevens hiervoor werden verzameld door literatuur en gesprekken met betrokkenen

Purpose - This thesis determines how to preserve and adapt built heritage while simultaneously adding density to the urban fabric of historic cities. Densifying already-existing houses could be an effective alternative for urban sprawl, which is unsustainable and puts cultural heritage at risk by causing heritage assets to become fragmented and deteriorated. The main goal is to investigate the current strategies used to densify townhouses from the 19th century in Zuidwijk, Antwerp.

Methodology - By creating a database on the historic and current situation of these 19th-century townhouses in Zuidwijk, tendencies regarding their residential use and densification are analysed. Additionally, a qualitative categorization of various adaption strategies for the same townhouses is created by examining building permits that are accessible through archived and on-site research.

Findings - This study shows that Zuidwijk is experiencing a trend of single-family townhouses being adapted into multiple-family residences. This adaptation can occur through a variety of strategies. Selecting the appropriate typology for a given building is crucial within the adaptation process, as it determines the potential of the existing townhouse and the objectives to be achieved through the adaptation. This thesis aims to serve as a basis for conducting more in-depth research into the phenomenon of adapting historic residences into multiple-family units, exploring its range of opportunities.

Research limitations - Identified research limitations include a small case study sample, mainly analysed without on-site visits and assessed from an architectural and heritage perspective. Further research and more detailed data regarding criteria such as policy and sustainability, should be considered in the future.

Anthropogenic activities across various land uses (e.g. roadsides, industrial areas,
agricultural zones) have introduced xenobiotics, substances not natural to the
ecosystem, in the environment, affecting soil physiochemical characteristics and soil
bacterial communities. To adapt to this changing environment, bacteria have evolved
to withstand these harsh conditions. Insertion sequences (IS) can form composite
transposons that recruit and carry along passenger genes, including those involved in
the degradation of organic pollutants. However, studies examining IS elements
abundance and its cargo in bacterial communities within their natural context is limited.
The purpose of this thesis is to improve our knowledge of the role of the IS element
IS6100 in genetic adaptation within soil bacterial communities. This research focused
on two parts, the first part on Pakistani soil samples that determined how bacterial
community structure and abundance of IS6100 associates with land uses, spatial, and
environmental factors. Land use and location exerted significant influence on alpha
and beta diversity in soil ecosystems, notably with agricultural soil demonstrating
higher diversity due to increased disturbance. While environmental factors such as Cu,
total nitrogen, As, Cd, and total carbon contribute to soil bacterial community variability,
their impact is relatively small compared to land use in shaping soil bacterial
composition. Nevertheless, 86% unexplained variability suggests the presence of
additional important factors that were not measured in our study. IS6100 is
widespread, with no differences in abundance across various geographic Pakistani
samples with differing land use. While effects of environmental factors including
community diversity was low, some toxic contaminants like DiPCB and TriPCB
exhibited a negative correlation with IS6100 abundance. The second part examined
contaminated soils in Belgium, assessing IS6100 abundance by qPCR. Moreover, a
new long-range PCR (LR-PCR) method was applied to amplify the cargo of IS6100
associated CTs for functional analysis by nanopore sequencing. IS6100 was present
across all samples, with significant variations in relative abundance between soils.
Particularly, soil samples continuously exposed to pesticides exhibited elevated
IS6100 abundances compared to those with less clear contaminants. Regarding cargo
genes identification, clear bands in the AGE for every sample suggested that the LR
PCR IS6100 cargo genes were successfully and reproducibly amplified. The amplicons
were successfully sequenced by nanopore sequencing for future functional analysis.

In de studie wordt de milieu-impact van keramische gevelstenen onderzocht. Hierbij wordt aandacht besteed aan de huidige recuperatiepraktijk door gesprekken aan te gaan met specialisten in het vakgebied. Op deze manier wordt relevante informatie verzameld die bewijst dat hergebruik een waardevolle strategie is in de schakeling naar een circulaire toekomst.

Door water te vervangen door ethyleenglycol als een van de vloeistoffasen bij solventextractie, kan een efficiëntere scheiding van zeldzame aarden verkregen worden. Het scheiden van yttrium en europium, twee zeldzame aarden die terug te vinden zijn in lampfosforen, is het doel van het beoogde extractieproces.

Jouw oude smartphone als grondstof voor jouw nieuwe“Jouw oude smartphone is geld waard!” wordt dikwijls gezegd. Dit geldt niet alleen voor jouw smartphone, maar ook voor tal van andere elektronica. Ze bevatten namelijk een groot aantal kritieke metalen. Al deze metalen kunnen hergebruikt worden in nieuwe toepassingen. Eén van deze metalen is indium.Indium? Nog nooit van gehoord!Indium is een belangrijke grondstof voor tal van hoogtechnologische toepassingen, vooral in de elektronische industrie.

Preserving nature in an urbanized modern environment proves to be rather difficult. A lot of effort is put into conserving the natural habitat. However in western Europe this natural habitat is reduced to small patches if not completely gone. Centuries of urbanization have reformed the landscape from a wild, natural environment to a more controlled, humanized creation. This shaping of the scenery has lead to a massive increase of human-induced pressure on natural populations of organisms.

Zeldzame aarden: van drone tot smartphoneHet begrip zeldzame aarden (Eng.: Rare Earth Elements, REE) klinkt waarschijnlijk niet echt bekend in de oren, maar iedereen maakt dagelijks gebruik van toepassingen waarin deze chemische stoffen in zitten verwerkt. Namen als europium, yttrium, dysprosium of praseodymium klinken exotisch en doen allicht geen belletje rinkelen, maar onze huidige samenleving zou ineenstorten zonder het gebruik van deze chemische elementen in tal van toepassingen.Wat zijn zeldzame aarden?De zeldzame aarden zijn, zoals hun naam reeds doet vermoeden, zeer schaars.