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Dietary Changes in Bronze Age Switzerland: Highlights of Analytical Sciences in Switzerland
No full textBaseLaunch - How to Launch and Build Exceptional Biotech Companies: Medicinal Chemistry and Chemical Biology Highlights
No full textHyperpolarized Solvatochromic Nanosensors towards Heparin Sensing in Blood: CHIMIA 2022, 76, 284-287
No full textSwitzerland at the International Chemistry Olympiad 2022: Conference Report
No full textAt the remote International Chemistry Olympiad 2022 hosted by China, two outstanding students from Switzerland won one bronze medal and one honorable mention. A joint remote participation to the event of the delegations from Germany, Austria, and Switzerland could be realized in Basel with the support of the University of Basel. The International Chemistry Olympiad 2023 will be hosted at ETH Zurich. This itinerary will mark the first time this annual event comes to Switzerland
ARXADA: A strong heritage - a powerful vision
Get PDFArxada, formerly part of Lonza Group, is a global specialty chemicals business with a world-class offering in Consumer Microbial Control (‘CMC’), Industrial Microbial Control (‘IMC’) and Specialty Products Solutions (‘SPS’). Its broad portfolio targets a range of end markets, and is supported by leading regulatory capabilities, IP expertise, and an established track record in R&D and manufacturing. With 3,800 employees, 26 production sites and 17 R&D centers, Arxada’s purpose is to make daily life safer, healthier, and greener
Molecular Similarity for Drug Discovery, Target Prediction and Chemical Space Visualization
Get PDFSimilar drug molecules often have similar properties and activities. Therefore, quantifying molecular similarity is central to drug discovery and optimization. Here I review computational methods using molecular similarity measures developed in my group within the interdisciplinary network NCCR TransCure investigating the physiology, structural biology and pharmacology of ion channels and membrane transporters. We designed a 3D molecular shape and pharmacophore comparison algorithm to optimize weak and unselective inhibitors by scaffold hopping and discovered potent and selective inhibitors of the ion channels TRPV6 and TRPM4, of endocannabinoid membrane transport, and of the divalent metal transporters DMT1 and ZIP8. We predicted off-target effects by combining molecular similarity searches from different molecular fingerprints against target annotated compounds from the ChEMBL database. Finally, we created interactive chemical space maps reflecting molecular similarities to facilitate the selection of screening compounds and the analysis of screening results. These different tools are available online at https://gdb.unibe.ch/tools/
Aqueous humour – The Art of the Chemical Spoof: Chemical Education
No full textChemical journals are serious things. However, occasionally the humour of chemistry breaks through and hoax or spoof articles are published. This article looks at some notable examples of this human side of our science.  
Challenges in ESI-MS-based Untargeted Metabolomics
Get PDFUntargeted metabolomics is now widely recognized as a useful tool for exploring metabolic changes taking place in biological systems under different conditions. In this article, we aim to provide a short overview of the liquid-phase separation methods hyphenated to MS to perform untargeted metabolomics of biological samples. Each approach is complemented by up-to-date literature to guide readers, as well as practical information for avoiding or fixing some of the most frequently encountered pitfalls. This article covers mainly data acquisition, but a short discussion is provided regarding signal processing and data treatment, as well as data analysis and its biological interpretation in the context of metabolomic studies
Soft Ionization Mass Spectrometry for Studying Noncovalent Interactions
Get PDFBiochemistry and structural biology have benefited tremendously from the development of electrospray ionization and matrix-assisted laser desorption/ionization, the two most important soft ionization methods used in modern mass spectrometry. Of importance in this context is that noncovalently bound complexes can be maintained in the gas phase using appropriate sample preparation conditions and instrumental settings in ESI-MS and MALDI-MS. This allows one to determine the architecture and stoichiometry of large noncovalent complexes, the binding of small molecule ligands and cofactors, and often even noncovalent binding affinities, since bound and unbound states can be clearly resolved and quantified using MS. This article presents an overview of the research in this particular area undertaken by my research group at ETH Zurich. I will introduce a number of specialized technologies that we have available in our laboratory, including MALDI mass spectrometry with high-mass detection for measuring complexes with molecular weights in the 100s of kDa range; the so-called “gap sampler” technology for high-throughput experiments; and a temperature programmed spray source for ESI. A number of selected applications will then be presented, including the study of GPCRs and other membrane proteins and their complexes, the determination of the melting behavior of non-canonical nucleic acid structures, the investigation of heterogeneous protein complexes and protein-based capsids, and the investigation of the influence of protein post-translational modifications on noncovalent binding profiles
Enhancement of Power-to-Gas via Multi-catalyst Reactors Tailoring Reaction Rate and Heat Exchange
Get PDFThe Sabatier reaction is a key element of power-to-gas development. For this reason, even though the process is known since more than one century, the Sabatier reaction is currently the object of important research efforts towards the development of new catalysts for performance improvement. However, the industrial exploitation of the Sabatier reaction depends on the development of reactors that match the best catalyst with an appropriate heat management. For this reason, this paper develops a methodology for the contemporary optimization of the reactor concept and the catalysts. It is observed that the reactor can be divided into three sections with contrasting requirements. In the first section, the main requirement concerns the reach of the reaction activation conditions. Hence, an adequate match between catalyst and reactor is needed, for example with an appropriate pre-heater. Once the reaction is activated, a reaction hotspot is formed, so that the cooling becomes determining and the main requirement for the catalyst is the resistance to poisoning and sintering. In the last section of the reactor, the low temperature activity of the catalyst is determining, so that a high-performing catalyst is needed. This paper indicates a strategy for the rational design of this catalyst, based on mechanistic evidences