The evolution of early diagenetic processes at the Mozambique margin during the last glacial-interglacial transition

The Mozambique continental margin experienced large variations in sedimentation rates, primarily due to re-routing of sediment deposition from the Zambezi River during the last glacial-Holocene transition. As changes in sediment accumulation and organic matter deposition impose a strong control on the formation of authigenic minerals in the sediment, the distribution of these minerals may reflect the regional paleoenvironmental and paleoclimatic evolution. Combining geochemical analyses of porewaters and sediments with a reactive transport modeling approach, we reconstruct the depositional history and its effect on pyrite formation and other biogeochemical transformations at a site on the Mozambique margin over the past 27 kyr. Fitting the model to match the observed geochemical patterns, most importantly authigenic pyrite, allowed for the reconstruction of past sulfate-methane transition zone depth, which migrated in response to changes in the sediment accumulation and organic matter deposition. Changes in sediment deposition quickly affected organoclastic sulfate reduction and associated pyrite formation, but the effect on anaerobic methane oxidation and subsequent pyrite formation occurred with a lag on the order of thousands of years. Model results reveal a transition from high diagenetic reaction rates representative of near-shore depositional environments during the late glacial maximum, to a setting typical of offshore sediments with low reaction rates at the present day. Notably, the remnants of methane and dissolved iron pools produced in the past still shape the diagenetic processes at and below the sulfate-methane transition zone today. Since deglacial shelf-flooding and corresponding changes in sediment deposition occurred along continental margins worldwide, our analysis highlights the important role of non-steady state diagenesis in continental margin sediments and its relevance for paleoceanographic interpretation of sediment cores experiencing strong variations in sediment input

Introducing the notion of social context of collective trauma to ESTSS

Living amidst war and mass suffering while grasping the opportunity for professional growth, intertwined into my life perspective. Along the years, ESTSS provided a backdrop for my contacts with mental health colleagues from whom I learned, and among whom many became my friends. These rich experiences guided me towards promoting awareness within ESTSS of the importance of social context in which healing of traumatized populations is expected to progress. Each incident of organized violence leaves behind new scores of traumatized individuals and family members, among whom many will need support that may stretch their resources beyond reasonable limits. We need to acknowledge the hindering effects of living in such a social context and that many people that we meet as professionals may carry the burden of unresolved trauma, which should not go by unattended

Expression of Msx1 and Dlx1 during Dumbo rat head development: Correlation with morphological features

The Dumbo rat possesses some characteristics that evoke several human syndromes, such as Treacher-Collins: shortness of the maxillary, zygomatic and mandibular bones, and low position of the ears. Knowing that many homeobox genes are candidates in craniofacial development, we investigated the involvement of the Msx1 and Dlx1 genes in the Dumbo phenotype with the aim of understanding their possible role in abnormal craniofacial morphogenesis and examining the possibility of using Dumbo rat as an experimental model for understanding abnormal craniofacial development. We studied the expression of these genes during craniofacial morphogenesis by RT-PCR method. We used Dumbo embryos at E12 and E14 and included the Wistar strain as a control. Semi-quantitative PCR analysis demonstrated that Msx1 and Dlx1 are expressed differently between Dumbo and Wistar rats, indicating that their low expression may underly the Dumbo phenotype

Versterken van de positie van de school in de regio

Samen met studenten werken aan een betere toekomst voor de regio. Dat is regioleren. Ondernemers, overheden en maatschappelijke organisaties bepalen de agenda en werken samen met onderwijs en onderzoek aan oplossingen. Waar liggen de uitdagingen? Voor de instellingen is het een belangrijke uitdaging om aansluiting te vinden bij de regio. Hoe verander je van een onderwijsinstelling in een regionaal kenniscentrum? Hoe wordt je een volwaardige partner in een kenniswerkplaats? Een tweede belangrijke uitdaging ligt in de koppeling van het leren in de regio aan de lerende regio. In het programma Regionale Transitie is deze taak bij de kenniswerkplaatsen gelegd. De kenniswerkplaats is gebaseerd op een gezamenlijke regionale kennisagenda van overheid, ondernemers, maatschappelijke organisaties, onderwijs en onderzoek

Studenten Van Hall Larenstein brengen verstening in kaart: voor gemeente Rheden

Drie Van Hall Larenstein-studenten, locatie Velp, ontwikkelden onlangs in opdracht van de gemeente Rheden een methode om verstening van privétuinen in kaart te brengen. Het doel hiervan is het in kaart brengen welke buurten het meest zijn versteend. Aan de hand van die informatie gaat de gemeente aan de slag met Operatie Steenbreek

Towards resilient organisation of recovery and care after disaster.

It is sometimes said that ‘water comes in three kinds: too little (drought), too much (floods) or too dirty (polluted)’. Floods are the most widespread disaster on land and can be generated by excessive precipitation coupled with saturation of the ground, very rapid rainfall which generates flash floods, rapid snowmelt, storm surges, tsunamis, the breaching of volcanic crater lakes or anthropogenic causes such as dam bursts. The devastating power of water necessitates precautionary and protective measures. Examples of risk assessment, spatial planning, capacity management and specific lessons drawn from past disasters are described elsewhere in this book. While emphasising their relevance, in this section we consider what happens after protective barriers fail and floods occur