Method for computing variances of estimates derived from the Health Interview Survey

A method for computing variances of estimates derived from the health interview survey[by Judy A. Bean].Public Health Service publication no. 1000, ser. 2, no. 38.Includes bibliographical references.1970500686

Thermal decomposition of hydrated selenites of trivalent lanthanides and yttrium

Hydrated lanthanide(III) and yttrium(III) selenites were prepared. Simultaneous thermogravimetric and differential thermal analysis, classical differential thermal analysis, X-ray diffraction and other methods of analysis have been used in the characterisation as well as in the study of the thermal decomposition of these compounds. The results led to the composition and thermal stability and also to interpretations concerning the thermal decomposition mechanisms. © 1990

The hydrothermal-volcanic system of Rincon de la Vieja volcano (Costa Rica): A combined (inorganic and organic) geochemical approach to understanding the origin of the fluid discharges and its possible application to volcanic surveillance

In the period 1998\u20132002 thermal spring discharges of Rincon de la Vieja volcano (NW Costa Rica) have been sampled and analyzed for major, trace and isotopic (18O/16O and D/H in waters and 3He/4He and 13C/12C in CO2 in gases) composition. The boiling pools hosted inside the summit crater (Active Crater) are characterized by high contents of magmatic-related compounds (SO2, HCl and HF) that strongly affect the chemistry of the crater lake. These chemical features are not shown by the thermal discharges seeping out in the surrounding area of the volcano. Here, the shallow aquifer apparently masks any possible clues related to the magmatic system. This suggests that the fluid vents located inside the Active Crater are likely to represent the most appropriate sampling sites for geochemical surveillance purposes, although the high gas discharge rate from the lake may occasionally prevent any fluid sampling. Alternatively, as already suggested by recent studies on the behavior of light hydrocarbons in different volcanic environments, the compositional features of the organic gas fraction in the more accessible outer flank thermal discharges could usefully be utilized, at least, to assess the thermodynamic conditions of the volcanichydrothermal system, since these compounds are affected by secondary processes only at limited extent

Breast cancer estrogen and progesterone receptors: associations with patient’s clinical and epidemiologic characteristics

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