Abstract: A frequency measuring apparatus and a flowmeter which can carry out highly accurate measurement in a short time is provided. A measured pulse signal from a frequency detecting portion is outputted to a first counter as a count input and to second counter as a control signal. The first counter counts the number of the input pulse in each period of the first timer output according to the output from the first timer having been set in 1 second period, for example. The second counter carries out the count of the reference clock from the rising point of the input pulse and measures the period of the input pulse. The arithmetic processing portion calculates the input pulse signal frequency up to the decimal portion on the basis of the count value of the first counter, the count value of the second counter at a generation timing of the output signal from the first timer, and the period of the input pulse.

Abstract: Novel nucleotide compounds represented by the formula (I) wherein R1 represents a protective group or a PEG bearing organic group; R2, R2′, R2″, R3, R3′ and R3″ each represents a hydrogen atom or an alkyl, cycloalkyl, aryl or aralkyl group which may contain a hetero-atom; B1, B2, B3 and B4 each represents a base, if necessary, protected by a protective group common in nucleotide chemistry or by a PEG bearing organic group; X, X′ and X″ each represents an oxygen atom or a sulfur atom; Y represents an azolyl group, a mono- or di-alkylamino group or a saturated nitrogenous heterocyclic ring; A1, A2, A3 and A4 each represents a hydrogen atom, a hydroxyl group, an alkoxy group or a trialkylsilyloxy group; and m and n each represents 0 or an integer of 1 to 100.

Abstract: An earthquake resistant, even loaded man-made land structure including an open container provided in the earth, a plate slidably provided in and enclosing the opening of the container, at least one layer of sand provided between the plate and the container, a means for introducing hydraulic fluid into the sand for maintaining the hydraulic fluid under pressure and dirt provided on top of the plate and filling the remainder of the container.