1,721,097 research outputs found
N-Octanol/Water Partition Coefficients of the Acetylacetonate and Maltolate Complexes of Al(III), Cr(III) and Fe(III) and of Aluminum Lactate
No full textEffetti del particolato atmosferico sulla salute umana. Indagine a Vicenza
No full textHealth effects of PM10 have been
estimated on urban population of
Vicenza (Italy) over the period
2002-2005 taking into account
most recent epidemiological evidences.
Large adverse effects attributable
to short-term and long-term
exposure to particulate matter have
been quantified: an average chronic
mortality of 17% (all causes, excluding
accidents, age>30, PM2.5>10
μg/m3) with 178 deaths a year and
a short-term mortality of 1.9-2.3%
(all causes, excluding accidents,
age>1, PM10>20 μg/m3) with
20.0-23.5 deaths a year, were estimated.
The health impact evaluated
for Vicenza appears markedly
higher than figures emerging from
main Italian and European studies,
mainly due to the higher exposure
levels of PM10 observed in Vicenza
in the period 2002-2005 (55.4
μg/m3)
Caratterizzazione superficiale di manufatti litici preistorici mediante microscopia elettronica a scansione. Il caso delle selci della collezione Lioy provenienti dalla Grotta della Mura
No full textSurface analysis of prehistoric lithic tools by scanning electron microscopy. The case of the flints of the
Lioy Collection coming from the cave “della Mura” (Colli Berici) - The authenticity of three prehistoric lithic tools
coming from the lower deposit of the cave “della Mura” (Colli Berici, Veneto, Italy) has been investigated. The objects
were described by Paolo Lioy in 1876 and now belong to the private Lioy Collection. They are three points obtained from
flint flakes (grey flint belonging to the Biancone formation) coming from the Lessini Mountains. Their morphology, in
particular the butts and the proximal parts, raised some doubts about their authenticity. The instrumental analysis by
SEM-EDS of the butts evidenced the localized presence of abnormal iron concentration around the impact points. This
support the hypothesis that they are false objects, produced in the 19th century and than introduced in the deposit
Direct determination of t,t-muconic acid in human urine by two-dimensional liquid chromatography
No full textHead-space gas-chromatographic determination of 2-alkyl-5,5-dimethyl-1,3-dioxane derivatives in wastewaters of a polyester resin plant
No full textThe static headspace gas chromatographic technique can be conveniently employed to check the presence and
amount of the odorous side-products, 2-R-1,3-dioxanes (R = H, CH3, C2H5, i-C3H7, n-C3H7), directly from the
wastewaters flowing from the reactors during the synthesis of polyester resins. By the optimisation of a simple and
direct analytical method, the amounts of these compounds may be continuously monitored and controlled. This
method is characterized by good repeatability (3–4%) and does not seem to suffer from matrix effects. The
detection limits for the determination of the five dioxanes fall in the range 400–700 mg dm23 (alfa=beta=0.05)
Ion chromatografic determination of borate in aqueous samples together with other common anions.
No full textThe conversion of boric acid (pK(a) approximate to 9) in a more acidic complex, using mannitol or sorbitol as ligands, has been exploited to obtain a sensitive and accurate method for the determination of boric acid by ion chromatography. Both separation and detection conditions have been selected on the basis of available thermodynamic data on the relevant equilibria, and then experimentally optimised on a conventional ion cromatograph equipped with a suppressed conductivity detector. The performances of the method are practically identical for the two eluent solutions adopted, containing mannitol or sorbitol: the detection limit is about 1 mu mol dm(-3), the linear response range extends up to 200 mu mol dm(-3), the repeatability is better than 5% and the analysis time is less than 6 min. Moreover, other common anions (i.e., acetate, fluoride, and chloride) can be determined together with borate. The comparison of results with those obtained by conventional analytical techniques applied to real samples at known concentration of borate allows the estimation of a negligible bias for the ion chromatographic method
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