The [OII]3727 emission line is frequently used as an indicator of the star formation rate (SFR) despite its complex dependence on metallicity and excitation conditions. We have analysed the properties of the [OII] and Halpha emission lines for a complete sample of local Halpha-selected galaxies, the Universidad Complutense de Madrid (UCM) survey

Selected photometric bands, spatial resolution, disk dimension in the frame and the scanned sky background level are determined in order to establish galactic structural parameters. A crude analysis could lead to erroneous results. Possible causes of error, as well as the minimum requirements for a precise determination of parameters, will be

Recent progress on the structure and dynamics of bulges is reviewed. Those aspects that link galaxy bulges either to oblate spheroids akin to elliptical galaxies or to rapidly-rotating, flattened systems more nearly resembling the products of disk internal transformations, are highlighted. The analysis of surface brightness profiles derived from

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Variations of temperature values for the last 20 000 years measured in the cave Dos Anas (Sierra del Rosario Cuba) are studied in comparison with the values of the hydrogen isotopes concentration obtained in the coral reef of the Barbados Island in the Caribbean region. They are compared as well with the abundance of Be10 measured in the permanent

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