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Manos Dassenakis
Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Zografos, Panepistimiopolis, Athens, 15784, Greece

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Journal article
Published: 02 August 2021 in Journal of Trace Elements in Medicine and Biology
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The present study focuses on the evaluation of potential relationships between trace elements and acute and chronic types of leukemia, via the determination of their levels in human blood serum. A total of 199 serum samples from a Greek cohort were examined, including both leukemia cases and controls. Elements’ analysis was carried out using inductively coupled plasma mass spectrometry (ICP-MS) and demographic features such as age, gender, smoking habits and area of residence were recorded and statistically treated applying Shapiro-Wilk, Kolmogorov-Smirnov, Mann Whitney and Kruskal Wallis tests (p < 0.05). Spearman correlation and principal component analysis (PCA) were also performed to investigate possible associations. The results demonstrated significantly higher (p < 0.05) trace elements concentrations in cases’ serum compared to that of controls excluding Ba, with Cu (median concentration 1295 μg L−1) being the most abundant in cases. Additionally, concentration of toxic Pb and Cd were found at seven and four fold higher concentrations in cases, respectively. Among the trace elements examined, only Rb (164 μg L−1) was detected in higher concentrations in controls. Ba, Cd and Co presented the lowest concentrations (lower than 1 μg L−1). PCA was performed for overall and classified data, indicating a stronger relation among the toxic As, Cd, Ni and Pb in cases than controls, particularly referring to smokers and industrial sites’ residents. Hematological parameters and factors such as age and gender did not present any significant outcome or correlation. The findings from this pilot study suggest a potential relationship between metals and leukemia, especially concerning the toxic ones. Results from the employed source apportionment tools imply that smoking and atmospheric degradation may be positively related with higher metal serum levels in leukemia patients.

ACS Style

Eirini Chrysochou; Konstantinos Koukoulakis; Panagiotis Georgios Kanellopoulos; Aikaterini Sakellari; Sotirios Karavoltsos; Manos Dassenakis; Minas Minaidis; George Maropoulos; Evangelos Bakeas. Human serum elements’ levels and leukemia: A first pilot study from an adult Greek cohort. Journal of Trace Elements in Medicine and Biology 2021, 68, 126833 .

AMA Style

Eirini Chrysochou, Konstantinos Koukoulakis, Panagiotis Georgios Kanellopoulos, Aikaterini Sakellari, Sotirios Karavoltsos, Manos Dassenakis, Minas Minaidis, George Maropoulos, Evangelos Bakeas. Human serum elements’ levels and leukemia: A first pilot study from an adult Greek cohort. Journal of Trace Elements in Medicine and Biology. 2021; 68 ():126833.

Chicago/Turabian Style

Eirini Chrysochou; Konstantinos Koukoulakis; Panagiotis Georgios Kanellopoulos; Aikaterini Sakellari; Sotirios Karavoltsos; Manos Dassenakis; Minas Minaidis; George Maropoulos; Evangelos Bakeas. 2021. "Human serum elements’ levels and leukemia: A first pilot study from an adult Greek cohort." Journal of Trace Elements in Medicine and Biology 68, no. : 126833.

Review
Published: 30 July 2021 in Water
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The multiple anthropogenic activities taking place in the marine environment increase and create a high demand for maritime space. The pressures generated thereof on coastal and marine resources require an integrated planning and management approach. The MSPD (2014/89/EU) forms the legislative framework to regulate maritime activities and ensure a sustainable use of the marine environment. Based on the MSFD (2008/56/EC), the present study provides an overview of the state of the marine environment in Greece and the existing pressures while examining the potential contribution of MSFD knowledge to the MSPD implementation, identifying possible knowledge gaps for the subsequent MSP process phases. It is supported that the MSFD constitutes the best available scientific knowledge about the ecosystem and its dynamics, and provides an open access database which should be optimally used in the MSP process. The MSFD data provided concerning Greece can support the implementation of the MSP process, as the MSFD qualitative descriptors of state and pressures feed MSP sectors with environmental data essential for the MSP application, and weigh the intensity of each descriptor contribution to this interrelationship. Considering MSPD requires the adoption of an ecosystem-based approach, it can only attain its goals based on MSFD input and aspirations.

ACS Style

Theodora Paramana; Aikaterini Karditsa; Niki Milatou; Stelios Petrakis; Persefoni Megalofonou; Serafim Poulos; Manos Dassenakis. MSFD In-Depth Knowledge of the Marine Environment as the Stepping Stone to Perform Marine Spatial Planning in Greece. Water 2021, 13, 2084 .

AMA Style

Theodora Paramana, Aikaterini Karditsa, Niki Milatou, Stelios Petrakis, Persefoni Megalofonou, Serafim Poulos, Manos Dassenakis. MSFD In-Depth Knowledge of the Marine Environment as the Stepping Stone to Perform Marine Spatial Planning in Greece. Water. 2021; 13 (15):2084.

Chicago/Turabian Style

Theodora Paramana; Aikaterini Karditsa; Niki Milatou; Stelios Petrakis; Persefoni Megalofonou; Serafim Poulos; Manos Dassenakis. 2021. "MSFD In-Depth Knowledge of the Marine Environment as the Stepping Stone to Perform Marine Spatial Planning in Greece." Water 13, no. 15: 2084.

Journal article
Published: 23 June 2020 in Journal of Marine Science and Engineering
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Normally atmospheric CO2 is the major driver of ocean acidification (OA); however, local discharge/degradation of organic matter (OM) and redox reactions can exacerbate OA in coastal areas. In this work we study the response of nutrient and carbon systems to pH decrease in relation to hydrographically induced intermittent characteristics and examine scenarios for future ocean acidification in a coastal system. Laboratory microcosm experiments were conducted using seawater and surface sediment collected from the deepest part of Elefsis Bay; the pH was constantly being monitored while CO2 gas addition was adjusted automatically. In Elefsis Bay surface pCO2 is already higher than global present atmospheric values, while near the bottom pCO2 reaches 1538 μatm and carbonate saturation states were calculated to be around 1.5. During the experiment, in more acidified conditions, limited alkalinity increase was observed and was correlated with the addition of bicarbonates and OM. Ammonium oxidation was decelerated and a nitrification mechanism was noticed, despite oxygen deficiency, paralleled by reduction of Mn-oxides. Phosphate was found significantly elevated for the first time in lower pH values, without reprecipitating after reoxygenation; this was linked with Fe(II) oxidation and Fe(III) reprecipitation without phosphate adsorption affecting both available dissolved phosphate and (dissolved inorganic nitrogen) DIN:DIP (dissolved inorganic phosphate)ratio.

ACS Style

Natalia Kapetanaki; Evangelia Krasakopoulou; Eleni Stathopoulou; Manos Dassenakis; Michael Scoullos. Severe Coastal Hypoxia Interchange with Ocean Acidification: An Experimental Perturbation Study on Carbon and Nutrient Biogeochemistry. Journal of Marine Science and Engineering 2020, 8, 462 .

AMA Style

Natalia Kapetanaki, Evangelia Krasakopoulou, Eleni Stathopoulou, Manos Dassenakis, Michael Scoullos. Severe Coastal Hypoxia Interchange with Ocean Acidification: An Experimental Perturbation Study on Carbon and Nutrient Biogeochemistry. Journal of Marine Science and Engineering. 2020; 8 (6):462.

Chicago/Turabian Style

Natalia Kapetanaki; Evangelia Krasakopoulou; Eleni Stathopoulou; Manos Dassenakis; Michael Scoullos. 2020. "Severe Coastal Hypoxia Interchange with Ocean Acidification: An Experimental Perturbation Study on Carbon and Nutrient Biogeochemistry." Journal of Marine Science and Engineering 8, no. 6: 462.

Journal article
Published: 27 May 2020 in Water
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Reduction of nutrient loadings is often prioritized among other management measures for improving the water quality of freshwaters within the catchment. However, urban point sources and agriculture still thrive as the main drivers of nitrogen and phosphorus pollution in European rivers. With this article we present a nationwide assessment of nitrogen and phosphorus loads that 18 large rivers in Greece receive with the purpose to assess variability among seasons, catchments, and river types and distinguish relationships between loads and land uses of the catchment. We employed an extensive dataset of 636 field measurements of nutrient concentrations and river discharges to calculate nitrogen and phosphorus loads. Descriptive statistics and a cluster analysis were conducted to identify commonalties and differences among catchments and seasons. In addition a network analysis was conducted and its modularity feature was used to detect commonalities among rivers and sampling sites with regard to their nutrient loads. A correlation analysis was used to identify major possible connections between types of land uses and nutrient loads. The results indicated that the rivers Alfeios, Strymonas, and Aliakmonas receive the highest inorganic nitrogen loads while the highest inorganic phosphorus loads were calculated for the rivers Strymonas, Aliakmonas, and Axios. Concerning the temporal variation of loads, inorganic nitrogen presented a peak on March and gradually declined until October when the dry period typically ends for most regions of Greece. Inorganic phosphorus loads had the highest average value in August and the lowest in October. Thus, our findings confirmed the presence of a typical seasonal variation in nitrogen loads that follows the seasonality in hydrology where high surface runoff during the wet months contribute to higher river discharges and higher nitrogen loads from the catchment. On the contrary, high phosphorus loads persisted during dry months that could be attributed to a dilution effect. Furthermore, the results imply a clear connection between agriculture and both nitrogen and phosphorus. Overall, this work presents extensive information on the nitrogen and phosphorus loads that major rivers in Greece receive that can largely aid water managers to adapt and revise basin management plans in accordance with agricultural management (e.g., which months farmers should reduce the use of fertilizers) with the purpose of meeting the environmental targets defined by the Water Framework Directive (WFD).

ACS Style

Konstantinos Stefanidis; Aikaterini Christopoulou; Serafeim Poulos; Emmanouil Dassenakis; Elias Dimitriou. Nitrogen and Phosphorus Loads in Greek Rivers: Implications for Management in Compliance with the Water Framework Directive. Water 2020, 12, 1531 .

AMA Style

Konstantinos Stefanidis, Aikaterini Christopoulou, Serafeim Poulos, Emmanouil Dassenakis, Elias Dimitriou. Nitrogen and Phosphorus Loads in Greek Rivers: Implications for Management in Compliance with the Water Framework Directive. Water. 2020; 12 (6):1531.

Chicago/Turabian Style

Konstantinos Stefanidis; Aikaterini Christopoulou; Serafeim Poulos; Emmanouil Dassenakis; Elias Dimitriou. 2020. "Nitrogen and Phosphorus Loads in Greek Rivers: Implications for Management in Compliance with the Water Framework Directive." Water 12, no. 6: 1531.

Journal article
Published: 15 February 2020 in Molecules
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Complex formation is among the mechanisms affecting metal bioaccessibility. Hence, the quantification of organic metal complexation in food items is of interest. Organic ligands in solutions of environmental and/or food origin function as buffering agents against small changes in dissolved metal concentrations, being able to maintain free metal ion concentrations below the toxicity threshold. Organic matter in vinegars consists of bioactive compounds, such as polyphenols, Maillard reaction endproducts, etc., capable of complexing metal ions. Furthermore, transition metal ions are considered as micronutrients essential for living organisms exerting a crucial role in metabolic processes. In this study, differential pulse anodic stripping voltammetry (DPASV), a sensitive electrochemical technique considered to be a powerful tool for the study of metal speciation, was applied for the first time in vinegar samples. The concentrations of Cu complexing ligands (LT) in 43 vinegars retailed in Greece varied between 0.05 and 52 μM, with the highest median concentration determined in balsamic vinegars (14 μM), compared to that of common vinegars (0.86 μM). In 21% of the vinegar samples examined, LT values were exceeded by the corresponding total Cu concentrations, indicating the presence of free Cu ion and/or bound within labile inorganic/organic complexes. Red grape balsamic vinegars exhibited the highest density of Cu ligands per mass unit of organic matter compared to other foodstuffs such as herbal infusions, coffee brews, and beers. Among the 16 metals determined in vinegars, Pb is of particular importance from a toxicological point of view, whereas further investigation is required regarding potential Rb biomagnification.

ACS Style

Sotirios Karavoltsos; Aikaterini Sakellari; Vassilia J. Sinanoglou; Panagiotis Zoumpoulakis; Marta Plavšić; Manos Dassenakis; Nick Kalogeropoulos. Copper Complexing Capacity and Trace Metal Content in Common and Balsamic Vinegars: Impact of Organic Matter. Molecules 2020, 25, 861 .

AMA Style

Sotirios Karavoltsos, Aikaterini Sakellari, Vassilia J. Sinanoglou, Panagiotis Zoumpoulakis, Marta Plavšić, Manos Dassenakis, Nick Kalogeropoulos. Copper Complexing Capacity and Trace Metal Content in Common and Balsamic Vinegars: Impact of Organic Matter. Molecules. 2020; 25 (4):861.

Chicago/Turabian Style

Sotirios Karavoltsos; Aikaterini Sakellari; Vassilia J. Sinanoglou; Panagiotis Zoumpoulakis; Marta Plavšić; Manos Dassenakis; Nick Kalogeropoulos. 2020. "Copper Complexing Capacity and Trace Metal Content in Common and Balsamic Vinegars: Impact of Organic Matter." Molecules 25, no. 4: 861.

Journal article
Published: 04 September 2019 in Journal of Marine Science and Engineering
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The Antinioti Lagoon is a karstified, rather pristine, and shallow coastal lagoon located in the northern part of Corfu Island in NW Greece. The present study examines the levels of metals (Al, Fe, Mn, Cd, Cu, Pb, and Zn) in the dissolved and particulate phase, as well as in surface and core sediments, and identifies the critical processes that define their behavior. The major transport pathway of dissolved Mn, Cd, and Pb, and particulate Mn, Cd, and Zn into the lagoon is through freshwater springs, whereas surface runoff dominates the transport of particulate Al, Fe, and Cu. Interestingly, large particles (>8 μm) contain higher amounts of Al, Fe and Mn than the finer ones (

ACS Style

Fotini Botsou; Aristomenis P. Karageorgis; Vasiliki Paraskevopoulou; Manos Dassenakis; Michael Scoullos. Critical Processes of Trace Metals Mobility in Transitional Waters: Implications from the Remote, Antinioti Lagoon, Corfu Island, Greece. Journal of Marine Science and Engineering 2019, 7, 307 .

AMA Style

Fotini Botsou, Aristomenis P. Karageorgis, Vasiliki Paraskevopoulou, Manos Dassenakis, Michael Scoullos. Critical Processes of Trace Metals Mobility in Transitional Waters: Implications from the Remote, Antinioti Lagoon, Corfu Island, Greece. Journal of Marine Science and Engineering. 2019; 7 (9):307.

Chicago/Turabian Style

Fotini Botsou; Aristomenis P. Karageorgis; Vasiliki Paraskevopoulou; Manos Dassenakis; Michael Scoullos. 2019. "Critical Processes of Trace Metals Mobility in Transitional Waters: Implications from the Remote, Antinioti Lagoon, Corfu Island, Greece." Journal of Marine Science and Engineering 7, no. 9: 307.