Exploring Microbial Diversity: Extending the boundaries of biopolymer production using parallel cultivation

Quickly, the show is about the start. Date: 3.5 thousand million years ago, location: planet Earth, event: life. Naturally, life is starting small, even microscopically tiny. Life in the form of microorganisms endures eons of time in which the world changes. They survived, failed, adapted, thrived, and they actually changed the world. They have...

Seemingly trivial secondary factors may determine microbial competition: a cautionary tale on the impact of iron supplementation through corrosion

Microbial community engineering aims for enrichment of a specific microbial trait by imposing specific cultivation conditions. This work demonstrates that things may be more complicated than typically presumed and that microbial competition can be affected by seemingly insignificant variables, like in this case the type of acid used for pH...

Product Inhibition and pH Affect Stoichiometry and Kinetics of Chain Elongating Microbial Communities in Sequencing Batch Bioreactors

Anaerobic microbial communities can produce carboxylic acids of medium chain length (e.g., caproate, caprylate) by elongating short chain fatty acids through reversed β-oxidation. Ethanol is a common electron donor for this process. The influence of environmental conditions on the stoichiometry and kinetics of ethanol-based chain elongation...

Experimental infrastructure requirements for quantitative research on microbial communities

Natural microbial communities are composed of a large diversity of interacting microorganisms, each with a specific role in the functional properties of the ecosystem. The objectives in microbial ecology research are related to identifying, understanding and exploring the role of these different microorganisms. Because of the rapidly...

“Candidatus Galacturonibacter soehngenii” Shows Acetogenic Catabolism of Galacturonic Acid but Lacks a Canonical Carbon Monoxide Dehydrogenase/Acetyl-CoA Synthase Complex

Acetogens have the ability to fixate carbon during fermentation by employing the Wood-Ljungdahl pathway (WLP), which is highly conserved across Bacteria and Archaea. In a previous study, product stoichometries in galacturonate-limited, anaerobic enrichment cultures of “Candidatus Galacturonibacter soehngenii,” from a novel genus within the...

Simultaneous growth and poly(3-hydroxybutyrate) (PHB) accumulation in a Plasticicumulans acidivorans dominated enrichment culture

The wide variety of organic carbon to nitrogen and phosphorous ratios that are encountered in different wastewaters has a major impact on the poly(3-hydroxybutyrate) (PHB) accumulation potential of microbial communities. In this study we investigated the influence of the substrate composition in terms of the carbon to nitrogen (C/N) or...

O₂ versus N₂O respiration in a continuous microbial enrichment

Despite its ecological importance, essential aspects of microbial N₂O reduction—such as the effect of O₂ availability on the N₂O sink capacity of a community—remain unclear. We studied N₂O vs. aerobic respiration in a chemostat culture to explore (i) the extent to which simultaneous respiration of N...

Urban Design and the Changing Context of Urban Regeneration in the Netherlands

Urban design schemes accompanied by avant-garde design of space have been an outcome of economic growth of cities and countries in many periods of time. At the beginning of the 21st century, Nieuw Crooswijk in Rotterdam was the largest area involved in nationally launched policies. Many times the conflicts surrounding the plan were in the...

Urban regeneration in Rotterdam: Economic and social values

Development of economic and social values is regarded as a key factor in urban development and urban regeneration. With its history of urban renewal and regeneration since the 1970s, Rotterdam provides an example to assess the profound changes from a socialized mode of housing provision and urban renewal towards more market-oriented strategies....

Urban Regeneration in Lyon Connectivity and Social Exclusion

Changing contexts in urban regeneration

The need to combat decay of obsolete housing and services in urban renewal areas has been recognized by every major country in Western Europe, including the Netherlands (Couch et al., 2003). Urban regeneration in general can be considered as developing an approach in a complex urban context that includes a variety of spatial scales, sectors,...

Duurzaamheid van de stadsvernieuwing: Een onderzoek naar de woonsituatie in het Oude Noorden te Rotterdam tijdens en na de stadsvernieuwing

Bedrijfsverbetering Zeescheepsreparatie: Arbeidspool, eisen, mogelijkheden en oplossingen

Over lange lijnen; ontwerp en beheer: Stedelijke vernieuwing als ontwerpstrategie

Stedelijke vernieuwing als ontwerpstrategie heeft de afgelopen jaren tot plannen geleid waarbij de relatie van de desbetreffende locatie met de stad als geheel een belangrijk thema vormt. In deze publikatie worden een aantal plantypen behandeld die na jaren van experimenteren zijn gerealiseerd of nog in uitvoering zijn. Bij de totstandkoming van...

Urban renewal in transition

Urban renewal in transition consists revised and enlarged version of two papers. The first paper 'urban renewal and restructuring: between economie and social renewal' had been presented at the conference 'Labour on the move and transitions in the building process', organlzed by the Bartlett School of Architecture and Planning (University...

Onderzoek vergeleken: Een vergelijking van de opzet en methodiek van zeven onderzoeken gericht op de aanpak van naoorlogse wijken

De naoorlogse wijken en daarmee bedoelen we in deze rapportage de wijken die gebouwd zijn in de periode 1945-1975, (1) staan sinds het begin van de jaren tachtig in de belangstelling. Vooral woningcorporaties brachten een toename van verhuur- en exploitatieproblemen in complexen die ze in deze wijken beheren in de publiciteit.

Eigenaar-bewoners in Bloemhof: Een haalbaarheidsonderzoek naar woningverbetering, zelfwerkzaamheid en werkloosheidsbestrijding

Nieuwe randvoorwaarden voor de stadsvernieuwing zijn stagnatie bij de verwerving van panden in het bezit van eigenaar-bewoners, en een hoge werkloosheid onder de bewoners van de stadsvernieuwingsgebieden. In 'Eigenaar-bewoners in Bloemhof' zijn deze randvoorwaarden nauw met elkaar verbonden. Deze publicatie bevat de resultaten van een onderzoek...

Woning- en wijkverbetering met behulp van georganiseerde zelfwerkzaamheid