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What has been a purification process in wastewater treatment plants for decades can also be used decentrally or semi-centrally as a recycling process for nutrients. Early separation of "solid and liquid" plays a key role here. It allows for flexible solutions in terms of process technology, especially in the treatment of urine.

A team from the UNIGE has succeeded in visualizing crystal nucleation - the stage that precedes crystallization - that was invisible until now. At the interface between chemistry and physics, the process of crystallization is omnipresent in nature and industry. It is the basis for the formation of snowflakes but also of certain active ingredients used in pharmacology.

Chemical syntheses in liquids and gases take place in three-dimensional space. Random collisions between molecules have to result in something new in an extremely short time. But there is another way: on a gold surface under ultrahigh vacuum conditions, molecules lying still next to each other can be made to combine - even those that would never want to react with each other in a liquid.

All living organisms that respire have to get rid of electrons. In oxygen-free environments, microorganisms deploy special molecules which act as extracellular electron shuttles to transfer the electrons from cells to minerals. A group of researchers has now discovered what determines the electron transfer efficiency of these "cabs".

Researchers at the Paul Scherrer Institute PSI and the Italian Institute of Technology IIT have developed a novel substance that disables a protein in the cell skeleton, leading to cell death. In this way, substances of this type can prevent, for example, the growth of tumours. To accomplish this, the researchers combined a structural biological method with the computational design of active agents.

Radiation therapy is one of the cornerstones of cancer therapy. However, some types of tumor respond little or hardly at all to radiation. If it were possible to make tumor cells more sensitive, treatment would be more effective and gentler. Empa and researchers have now succeeded in using metal oxide nanoparticles as "radiosensitizers" - and in producing them on an industrial scale.

Scientists at EPFL and the Paul Scherrer Institute (PSI) have studied the chemical composition and origin - whether natural or anthropogenic - of aerosols in a region spanning from Russia to Canada. Their findings provide unique insights for helping researchers better understand climate change in the Arctic and design effective pollution-mitigation measures.

The shape of galaxies and how they evolve depend on a web of cosmological filaments that run across the Universe. According to a recent study headed by EPFL's Laboratory of Astrophysics, this cosmic web plays a much bigger role than previously thought. Across the Universe, galaxies are distributed along what's called the cosmic web, a complex network of filaments made up of ordinary and dark matter.

Bioengineers at EPFL have found a way to radically increase the efficiency of single-cell RNA-sequencing, a powerful tool that can -read- the genetic profile of an individual cell. Single-cell RNA sequencing, or -scRNA-seq- for short, is a technique that allows scientists to study the expression of genes in an individual cell within a mixed population - which is virtually how all cells exist in the body's tissues.

A team from the University of Geneva has developed a new material that improves the performance of solid-state sodium batteries, a less dangerous and more durable alternative to lithium. The future of battery technologies lies in sodium. More sustainable than lithium - which currently powers most of our devices and vehicles - sodium is also abundant on the earth's surface.

Scientists at EPFL have developed a way to maximize hydrogen yields from biowaste, within few milliseconds. The method uses rapid photo-pyrolysis to produce hydrogen gas and solid conductive carbon from banana peels. As the world's energy demands increase, so does our consumption of fossil fuels. The result is a massive rise in greenhouse gases emissions with severely adverse environmental effects.

For the elimination of trace substances at wastewater treatment plants (WWTP), granular activated carbon (GAC) is also available as an alternative treatment option to ozonation and the powdered activated carbon process (PAC). In contrast to the high energy consumption in ozonation (electrical energy to generate ozone and liquid oxygen), the energy-intensive production and CO2-footprint of carbon (starting raw materials, process energy) have an impact on activated carbon treatment.

Scientists have observed how catalysts behave at the particle level during water electrolysis. Catalysts play a crucial role in this reaction, in which water splits into hydrogen and oxygen. By shedding light on the underlying mechanism of the functional role of catalysts during the reaction, the scientists have made an important discovery for the design of renewable-energy storage systems.

Organoids are miniature lab-grown tissue structures that can mimic real organs. But guiding stem cells to grow an organoid of defined shape and size is difficult. Now, EPFL bioengineers have developed new methods for successfully guiding the stem cells to grow into intestinal tissues with real-life 3D structure and function.

Chemical engineers at EPFL have developed a new approach to artificial photosynthesis, a method for harvesting solar energy that produces hydrogen as a clean fuel from water. -Artificial photosynthesis is the holy grail of all chemists,- says Astrid Olaya, a chemical engineer at EPFL's Institute of Chemical Sciences and Engineering (ISIC).

Every living thing requires energy. This is also true of microorganisms. This energy is frequently generated in the cells by respiration, that is by the combustion of organic compounds, in other words: food. During this process, electrons are released which the microorganisms then need to get rid of.

Scientists in Switzerland and Germany have achieved efficient electron-beam modulation using integrated photonics - circuits that guide light on a chip. The experiments could lead to entirely new quantum measurement schemes in electron microscopy. The transmission electron microscope (TEM) can image molecular structures at the atomic scale by using electrons instead of light, and has revolutionized materials science and structural biology.

Chemists at the University of Geneva have developed a new technique for selecting assemblies of molecules, making it possible to find the best combinations for each protein to be combated quickly and cheaply. Our body must constantly defend itself against bacteria and viruses. It generates millions of different antibodies, which are selected to recognise the enemy and trigger the best possible immune response.

Researchers at EPFL, China, Spain and the Netherlands have built a micro-device that uses vibrating molecules to transform invisible mid-infrared light into visible light. The breakthrough ushers in a new class of compact sensors for thermal imaging and chemical or biological analysis. Image: Artistic view of the nanoparticle-in-groove plasmonic cavities.

In the quest to study the womb and its role in reproductive health, researchers in the Turco lab and their collaborators have generated a cellular map of the human uterus and of endometrial organoids — lab-grown models of the womb's lining. The atlas, which is the most detailed of its kind, will help scientists to develop better models of the womb.