Abstract: This invention relates to means of qualitative and quantitative analysis of microbial populations potentially present in a sample. These means notably comprise the use of at least one RNA-targeted oligonucleotide probe for in situ hybridization in whole cells; followed by the extraction of those probes which have become hybridized by separation from their target and elution from the microbial cells; as well as the detection and measurement of said extracted probes.

Abstract: This cap is intended especially for a bottle or a container with a neck and is designed to be fastened to the latter in the conventional way by means of a thread or as a result of force-fitting and for this purpose has relative to the neck an outer skirt (1) and an inner skirt (2). According to the invention, this cap is provided with a pouring orifice (3) which can be closed sealingly and opened so as to ensure a flow variable on demand, as a result of the sliding movement of a flap (5) held laid against it by means of a slideway and fixed to the top (4) of the cap on the opposite side (8) to the pouring orifice (3) by means of a folded part (7) which is retractable and concealable as a result of finger operation.