Forschungslandschaft biotische Rohstoffe: Unternehmen und Branchen auf dem Weg zur Nachhaltigkeit (COMPASS)

Sustainable production and the sustainable use of biotic resources have becomeincreasingly significant. This results in the demand by society for a sustainable useof biotic resources especially within the nutrition sector. But also their use for industrial purposes had led research and development being given the task to support our economy with conceptional ideas.In this respect, the Working Group Eco-Efficiency & Sustainable Enterprises at theWuppertal Institute with Dr. Christa Liedtke as head, has developed a research landscape that gives a general overview of the theme of biotic resources - their sustainable production and use. The working group defines aims of research andlists urgent and current research tasks on a macro (politico-economically), meso (branches) and micro (enterprises and production) level. It is necessary to take onthe challenge that a future sustainable development presents for us. That is to realizeecologically, socially and economically a triple gain strategy along the three pillars of sustainability - to save resources, to create wealth and to strengthencompetitiveness.To implement this strategy the Working Group Eco-Efficiency and Sustainable Enterprises has developed the methodology tool of COMPASS (COMPAnies and Sectors' Path to Sustainability). Its aim is the system-embracing optimization ofsingle process chains, of products and services considering ecological, social and economic aspects. This methodology has already been implemented in various otherbranches and enterprises and it is now necessary to further adopt, test andspecifically develop COMPASS as a decision tool in the vast area of production anduse of biotic resources.This is done in a dialogue- and practice oriented way and inclose co-operation with all actors of the corresponding production lines. Generalworking themes that the Working Group will concentrate on in future deal with theproduct lines food products and products from renewable resources as follows:Identification of the ecological, economic and social targets of sustainability and aclassification of frameworks, obstacles and supporting aspects of sustainabledevelopment Identification of main material flows and severest pollution, of areas of highestmaterial turnover and of most significant social impacts within the area ofnutrition and use of renewable resources --

Mechanical robustness of Pseudomonas aeruginosa biofilms

Biofilms grow on various surfaces and in many different environments, a phenomenon that constitutes major problems in industry and medicine. Despite their importance little is known about the viscoelastic properties of biofilms and how these depend on the chemical microenvironment. Here, we find that the mechanical properties of Pseudomonas aeruginosa (P.a.) biofilms are highly robust towards chemical perturbations. Specifically, we observe that P.a. biofilms are able to fully regain their initial stiffness after yielding is enforced, even in the presence of chemicals. Moreover, only trivalent ions and citric acid significantly affect the biofilm elasticity, the first of which also alters the texture of the material. Finally, our results indicate that biofilm mechanics and bacteria viability inside the biofilm are not necessarily linked which suggests that targeting bacteria alone might not be sufficient for biofilm removal strategies.National Institute of Mental Health (U.S.) (P50-GM068763)National Institute of Mental Health (U.S.) (P30-ES002109)German Academic Exchange Service (DAAD

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe