1,720,963 research outputs found
IRER (Istituto Regionale di Ricercha della Lombardia): RicercheSostenibilità ed evoluzione tecnologica nel sistema di depurazione lombardo: il riutilizzo delle acque reflue e dei fanghi di depurazione.
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Caratteristiche qualitative dei fanghi di depurazione. La gestione dei fanghi di depurazione: aspetti Tecnici, Economici e di Pianfificazione.
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Le sorgenti della placca di Castagnola (Appennino pavese-alessandrino) - Rapporti tra struttura geologica e chimismo delle acque.
No full textRisultati di un'indagine sperimentale sul percolato di discariche di rifiuti solidi urbani
No full textInfluence of three species of arbuscular mycorrhizal fungi on the persistence of aromatic hydrocarbons in contaminated substrates.
No full textAromatic hydrocarbons are pollutants which
have mutagenic and carcinogenic properties as well as
relatively high hydrosolubility. Their presence in soils
makes techniques such as bioremediation an important
topic for research. In this work, the effect of arbuscular
mycorrhiza (AM) on the persistence of benzene, toluene,
ethylbenzene and xylene (BTEX) in artificially contaminated
substrates was evaluated. Leek plants were grown
with three AM fungal species using a specially designed
mesocosm system, in which internal air and substrate
samples were analyzed by gas chromatography for BTEX
content. Strong reductions in the BTEX concentration in
substrates were generally observed in the presence of
mycorrhizal plants. Residual BTEX content ranged between
nearly total disappearance (<2%) and 40% of the
original concentration, whereas there was a high persistence
of hydrocarbons in the samples of substrate alone
or with non-mycorrhizal plants. These results provide first
evidence for an influence of AM activity in reducing pollution
of substrates by aromatic hydrocarbons
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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