4 research outputs found

    Enzymatic Synthesis of Alkyl Glucosides by β‐Glucosidases in a 2‐in‐1 Deep Eutectic Solvent System 

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    Alkyl glycosides are biodegradable surfactants with excellent physico-chemical properties. Although their wide-range application is considered ecofriendly, their synthesis is not due to the need for toxic organic solvents and corrosive acids as catalysts. Moreover, chemical synthesis results in complex mixtures rather than defined compounds. To overcome both disadvantages as well as the limited solubility of sugars in organic solvents, a highly selective enzymatic synthesis was set up with a β-glucosidase condensing D-glucose and different fatty alcohols in a deep eutectic solvent

    Enantiomer discrimination in β-phenylalanine degradation by a newly isolated Paraburkholderia strain BS115 and type strain PsJN

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    Despite their key role in numerous natural compounds, β-amino acids have rarely been studied as substrates for microbial degradation. Fermentation of the newly isolated Paraburkholderia strain BS115 and the type strain P. phytofirmans PsJN with β-phenylalanine (β-PA) as sole nitrogen source revealed (S)-selective transamination of β-PA to the corresponding β-keto acid by both strains, accompanied by substantial formation of acetophenone (AP) from spontaneous decarboxylation of the emerging β-keto acid. While the PsJN culture became stationary after entire (S)-β-PA consumption, BS115 showed further growth at a considerably slower rate, consuming (R)-β-PA without generation of AP which points to a different degradation mechanism for this enantiomer. This is the first report on degradation of both enantiomers of any β-amino acid by one single bacterial strain

    MorphableUI: a hypergraph-based approach to distributed multimodal interaction for rapid prototyping and changing environments

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    Nowadays, users interact with applications in constantly changing environments. The plethora of I/O modalities is beneficial for a wide range of application areas such as virtual reality, cloud-based software, or scientific visualization. These areas require interfaces based not only on the traditional mouse and keyboard but also on gestures, speech, or highly-specialized and environment-dependent equipment. We introduce a hypergraph-based interaction model and its implementation as a distributed system, called MorphableUI. Its primary focus is to deliver a user- and developer-friendly way to establish dynamic connections between applications and interaction devices. We present an easy-to-use API for developers and a mobile frontend for users to set up their preferred interfaces. During runtime, MorphableUI transports interaction data between devices and applications. As one of the novelties, the system supports I/O transfer functions by automatically splitting, merging, and casting inputs from different modalities. MorphableUI emphasizes rapid prototyping and, e.g., facilitates the execution of user studies due to easy UI reconfiguration and device exchangeability

    Enantiomer discrimination in β-phenylalanine degradation by a newly isolated Paraburkholderia strain BS115 and type strain PsJN

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    Abstract Despite their key role in numerous natural compounds, β-amino acids have rarely been studied as substrates for microbial degradation. Fermentation of the newly isolated Paraburkholderia strain BS115 and the type strain P. phytofirmans PsJN with β-phenylalanine (β-PA) as sole nitrogen source revealed (S)-selective transamination of β-PA to the corresponding β-keto acid by both strains, accompanied by substantial formation of acetophenone (AP) from spontaneous decarboxylation of the emerging β-keto acid. While the PsJN culture became stationary after entire (S)-β-PA consumption, BS115 showed further growth at a considerably slower rate, consuming (R)-β-PA without generation of AP which points to a different degradation mechanism for this enantiomer. This is the first report on degradation of both enantiomers of any β-amino acid by one single bacterial strain
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