Patient interface (
50
) optically indicating a user that a member (
22
) of the patient interface (
50
) needs to be replaced due to wear. In particular, it relates to a member (
22
) for patient interface (
50
) which comprises at least one functional material (
32, 34
) having a predefined functionality and at least one indicator (
28, 30
) wherein the concentration of said at least one indicator (
28, 30
) in said member (
22
) correlates with the predefined functionality of said at least one functional material (
32, 34
).
N-Acyl-3-amino-5H-furanone derivatives as new inhibitors of LuxR-dependent quorum sensing: Synthesis, biological evaluation and binding mode study
New N-acyl homoserine lactone analogues, N-acyl-3-amino-5H-furanone derivatives and some 4-halogeno counterparts, were synthesised and tested for their ability to modulate LuxR-dependent bacterial quorumsensing. Both types of analogues proved to be inhibitors, the halogenated compounds being significantly more active. Molecular modelling suggested that the conjugated enamide group induces two preferential