Abstract Aureobasidium is omnipresent and can be isolated from air, water bodies, soil, wood, and other plant materials, as well as inorganic materials such as rocks and marble. A total of 32 species of this fungal genus have been identified at the level of DNA, of which Aureobasidium pullulans is best known. Aureobasidium is of interest for a sustainable economy because it can be used to produce a wide variety of compounds, including enzymes, polysaccharides, and biosurfactants. Moreover, it can be used to promote plant growth and protect wood and crops. To this end, Aureobasidium cells adhere to wood or plants by producing extracellular polysaccharides, thereby forming a biofilm. This biofilm provides a sustainable alternative to petrol-based coatings and toxic chemicals. This and the fact that Aureobasidium biofilms have the potential of self-repair make them a potential engineered living material avant la lettre.
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Can you remember the last time the ground gave way beneath you? When you thought the ground was stable, but for some reason it wasn’t? Perhaps you encountered a pothole on the streets of Amsterdam, or you were renovating your house and broke through the floor. Perhaps there was a molehill in a park or garden. You probably had to hold on to something to steady yourself. Perhaps you even slipped or fell. While I sincerely hope that nobody here was hurt in the process, I would like you to keep that feeling in your mind when reading what follows. It is the central theme of the words that will follow. The ground beneath our feet today is not as stable as the streets of Amsterdam, your park around the corner or even a poorly renovated upstairs bedroom. This is because whatever devices we use and whatever pathways we choose, we all live in hybrid physical and digital social spaces (Kitchin and Dodge 2011). Digital social spaces can be social media platforms like Twitter or Facebook, but also chat apps like WhatsApp or Signal. Crucially, social spaces are increasingly hybrid, in which conversations take place across digital spaces (WhatsApp chat group) and physical spaces (meeting friends in a cafe) simultaneously. The ground beneath our feet is not made of concrete or stone or wood but of bits and bytes.
Dark homogenous fungal-based layers called biofinishes and vegetable oils are keyingredients of an innovative wood protecting system. The aim of this study was todetermine which of the vegetable oils that have been used to generate biofinishes onwood will provide carbon and energy for the biofinish-inhabiting fungus Aureobasidiummelanogenum, and to determine the effect of the oil type and the amount of oil on thecell yield. Aureobasidium melanogenum was cultivated in shake flasks with differenttypes and amounts of carbon-based nutrients. Oil-related total cell and colony-formingunit growth were demonstrated in suspensions with initially 1% raw linseed,stand linseed, and olive oil. Oil-related cell growth was also demonstrated with rawlinseed oil, using an initial amount of 0.02% and an oil addition during cultivation. Nilered staining showed the accumulation of fatty acids inside cells grown in the presenceof oil. In conclusion, each tested vegetable oil was used as carbon and energysource by A. melanogenum. The results indicated that stand linseed oil provides lesscarbon and energy than olive and raw linseed oil. This research is a fundamental stepin unraveling the effects of vegetable oils on biofinish formation.
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