Search results for "Monitoring"

Biomonitoring pasywny terenów leśnych w gminie Twardogóra

2016

Celem przeprowadzonych badań była ocena poziomu zanieczyszczenia wybranymi metalami ciężkimi: Zn, Ni, Cd i Pb terenów leśnych gminy Twardogóra. Miasto Twardogóra położone jest w północno-wschodniej części województwa dolnośląskiego, lasy stanowią 44% całej powierzchni gminy. Porosty Hypogymnia physodes oraz mchy Pleurozium schreberi pobrane zostały z 32 miejsc zlokalizowanych w pobliżu wsi Gola, Goszcz, Grabowno Wielkie oraz Sosnówka. Wybrane metale ciężkie (Ni, Zn, Cd i Pb) oznaczono metodą absorpcyjnej spektroskopii atomowej. Wyniki badań zinterpretowano, wykorzystując m.in. współczynnik porównawczy CF, będący różnicą w stężeniach analitu zakumulowanego w porostach i w mchach, odniesioną …

Environmental impact of Mt. Etna’s degassing: volcanogenic trace elements bioaccumulation in two endemic plant species (Senecio aethnensis and Rumex …

2010

A biomonitoring survey, above tree line level, using two endemic species (Senecio aethnensis and Rumex aethnensis)was performed on Mt. Etna, in order to evaluate the dispersion and the impact of volcanic atmospheric emissions. Samples of leaves were collected in summer 2008 from 30 sites in the upper part of the volcano (1500-3000 m a.s.l). Acid digestion of samples was carried out with a microwave oven, and 44 elements were analyzed by using plasma spectrometry (ICP-MS and ICP-OES). The highest concentrations of all investigated elements were found in the samples collected closest to the degassing craters, and in the downwind sector, confirming that the eastern flank of Mt. Etna is the mos…

Application of the moss bag biomonitoring technique in an active volcanic environment (Mt. Etna, Italy).

2011

This paper presents the preliminary results of a biomonitoring study based on the use of moss bags exposed at 24 sites on Etna volcano. Sphagnum mosses were used to study bioaccumulation originating from atmospheric deposition, by measuring the tissue contents of major and a large suite of trace elements. Elements, such as Tl, Bi, As, Se, Cu and Cd, display high concentrations in the exposed samples close to the active vents. This study confirms the effectiveness of the moss bags technique also in active volcanic areas.

CHEMICAL AND MINERALOGICAL CHARACTERIZATION OF ETNEAN VOLCANIC EMISSIONS USING ACTIVE BIOMONITORING TEC HNIQUE (MOSS-BAGS)

2011

ANALISI DELLA RISPOSTA DEL BIOMONITORAGGIO DI METALLI IN TRACCIA MEDIANTE L’UTILIZZO DI LICHENI IN CAMPAGNE DI STUDIO CONDOTTE IN CONDIZIONI CLIMATIC…

2007

The results of a biomonitoring surveys carried on in Palermo using the accumulation of heavy metals in lichens, thalli of Xanthoria s.l. as indicators of air pollution are reported in this work. Beginning from the data of 38 simple sites shed on Palermo’s territory, has been developed a study of the air pollution in the centre of the town, the target of this work is to know the existing relationship between the concentration of heavy metals study area and the possible pollution sources as industry, shipyards, vehicles etc. In order to recuperate most information of the territory, the development of this work has been carried on with a new technology for the data management: the GIS (Geograp…

Mercury’s Distribution in the Atmosphere, Soils and Plants of the Active Hydrothermal Area of Nisyros (Greece).

2014

Health Risk Assessment of Exposure to 15 Essential and Toxic Elements in Spanish Women of Reproductive Age: A Case Study

2021

This case study investigates the exposure of 119 Spanish women of reproductive age to 5 essential (Co, Cu, Mn, V, Zn) and 10 toxic (Ba, Be, Cs, Ni, Pb, Pt, Sb, Th, Al, U) elements and assesses their risk. The essential elements (Co, Cu, Mn, V, and Zn) showed average concentrations (GM: geometric mean) of 0.8, 35, 0.5, 0.2, and 347 μg/L, respectively. Five of the toxic elements (Ba, Cs, Ni, Al, U) exhibited detection frequencies of 100%. The GM concentrations of the novel toxic elements were 12 μg/L (Al), 0.01 μg/L (Pt), 0.02 μg/L (U), 0.12 μg/L (Th), 0.009 μg/L (Be) and 4 μg/L (Cs). The urine analysis was combined with a survey to assess any variations between subgroups…

Augsnes un veģetācijas izmaiņas piesārņojuma dēļ Rīgas pilsētas mežos

2017

Pilsētas vides piesārņojumu var novērtēt dažādos veidos un viens no visbiežāk izmantotajiem ir sūnu biomonitorings. Līdz šim vēl nav atklāti un noskaidroti vienoti standarti par sūnu biomonitoringa efektīvāku izmantošanu. Nav arī vienota pētījuma par augsnes piesārņojuma ietekmi uz augu sugu daudzveidību. Pētījuma mērķis ir noskaidrot pilsētas vides piesārņotības pakāpes izvērtējumu, izmantojot sūnas un augsni kā bioindikatorus, un noteikt augu sugu daudzveidību atkarībā no augsnes piesārņojuma. Sphagnum sūnu sastāvā esošās smago metālu augstās koncentrācijas norāda, ka lielākais vides piesārņojums atrodams ceļa malās ar intensīvu satiksmi vai rūpnīcu, ostu tuvumā. Smago metālu piesārņojums…

A new calibration of the effective scattering albedo and soil roughness parameters in the SMOS SM retrieval algorithm

2017

Abstract This study focuses on the calibration of the effective vegetation scattering albedo (ω) and surface soil roughness parameters (H R , and N Rp , p = H,V) in the Soil Moisture (SM) retrieval from L-band passive microwave observations using the L-band Microwave Emission of the Biosphere (L-MEB) model. In the current Soil Moisture and Ocean Salinity (SMOS) Level 2 (L2), v620, and Level 3 (L3), v300, SM retrieval algorithms, low vegetated areas are parameterized by ω = 0 and H R  = 0.1, whereas values of ω = 0.06 − 0.08 and H R  = 0.3 are used for forests. Several parameterizations of the vegetation and soil roughness parameters (ω, H R and N Rp , p = H,V) were tested in this study, tre…

Mutes gļotādas mikrocirkulācijas novērtējums izmantojot attēlvides fotopletizmogrāfiju

2019

Manipulācijas ar smaganām ir kļuvušas par standarta procedūrām zobārstniecībā rosinot nepieciešamību pēc smaganu funkcionālām izvērtēšanas metodēm. It īpaši tādēļ, ka smaganu klīniskā aina nevienmēr atspoguļo to funkcionālo stāvokli un morfoloģiskās īpatnības var nomaskēt funkcionālos traucējumus. Vietējā anestēzija ir neatņemama zobārstniecības procedūra, kas novērš pacienta diskomfortu manipulāciju laikā, taču dažreiz tā var radīt arī nevēlamās blakusparādības vai pat komplikācijas, kam ir vairāki iemesli (lielās devas, individuālā jutība uz kādu no anestēzijas komponentu, traucējumi pulpas un smaganu asins apgādē, vai pat neirotoksicitāte). Līdz ar to devas samazināšana ir ļoti svarīga, …