The present invention provides a process for the preparation of stable and reusable biosensing granules useful in the assessment of biodegradability of effluents. An information searcher accesses a Web server and searches it for desired information. In another embodiment, the node comprises the processor cores and the node controller. Also, data of the second data stream are assigned to the signal points of each signal point group. At least one of the sleeve-shaped member and the extension part is of a resilient material. More specifically, methyl acetate is selectively produced by reaction of dimethyl ether with carbon monoxide in the presence of a catalyst comprising mordenite or ferrierite, under substantially anhydrous conditions.