Nikolaos V. Stamatis

Hellenic Agricultural Organisation "Demeter", Fisheries Research Institute, Kavala, Greece · Marine Chemistry, Fish Processing

Seminar details on the cource in Kalymnos island aiming processing methods of low demand fishery products (albacore, bogue ect.)

This paper aims to determine the content and bioaccumulation patterns of eight trace elements (Li, Cr, Co, As, Se, Cd, Pb and Hg) and one radioisotope (U) in kidney, liver and muscle tissues of two fish species (Squalius orpheus and Barbus strumicae) from Nestos River (northern Greece), and the potential human health risk due to the fish muscle con...

This research aims to examine the nutritional value (proximate analysis, ω-3 fatty acids profile, total phosphorus) and the calorific energy of eight commercial marine species caught on the open sea, lagoons, and fish farms in the region of Kavala but also of the local botargo ("aygotaracho", in Greek), a processed product of Mugil cephalus gonads....

Fish and their products are rich sources of essential fatty acids beneficial for the human health. The region of Kavala, Greece, is an important spot of fish production, contributing to the growing need for food of high quality. The present work aimed to specify the profiles of the fatty acids, emphasizing in omega-3 (ω-3) fatty acids, in the edibl...

The current research aimed to assess the impact of 1% and 2% aqueous extracts of Greek oregano (Origanum vulgare subsp. hirtum) as natural preservation medium for European anchovy (E. encrasicolus), compared to the conventional method (seawater and ice). The research encompassed the assessment of moisture, ash, total protein, total fat content, fat...

Fresh fillets of M. cephalus constitute a valuable by-product of the botargo, 'avgotaracho' in Greek, processing process in Greece and the Mediterranean. Thus, using them to manufacture processed final products is of high importance for the lagoon fishermen. This study conducted the production of a new, 'fish satay' type, exportable, ready to eat,...

Despite significant progress, certain inflammation related to chronic disorders, including cardiovascular diseases (CVD) and cancer, still present high mortality rates. Thus, further study is needed to address such pathologies more appropriately. Apart from classic therapeutics, natural bioactives with less toxic side effects have gained attention,...

This paper aims to determine the content of eight trace elements (Li, Cr, Co, As, Se, Cd, Pb and Hg) and one radioisotope ( ²³⁸ U) in kidney, liver and muscle tissues of two endemic species ( Squalius orpheus and Barbus strumicae ) from Nestos River (northern Greece), and to evaluate the potential risk to human health due to the consumption of the...

Over the last century, anthropogenic activities have increased global carbon emissions and freshwater use, intensifying critical environmental problems such as global warming and water scarcity. This study unveils the metabolic and physiological adaptation of Chlorella vulgaris under extreme NaCl and CO2 concentrations, suggesting a possible haloto...

Marketing of fresh anchovy in Greece is of great importance. In the present study, the effect of ozone on some basic chemical (moisture, ash, protein, fat, fatty acids, biogenic amines), microbial (total viable count, Enterobacteriaceae and pseudomonads) and sensorial (general appearance, color and shape of eyes, color of gills, muscle and abdomen...

The fatty acid profiles of the lipid classes in the polar and neutral fractions of the filet fat of day-fresh European anchovy (Engraulis encrasicolus, Lineus 1758) were determined by a combination of Thin Layer Chromatography and Gas Chromatography. The results show the polar fraction of the fat is rich in polyunsaturated fatty acids with docosahe...

Fishery of decapod crustaceans remain, globally, a process that provides societies with very important commercial food items, which are considered high nutritional resources, mainly due to their composition in protein and fatty acids. The aim of the present study is to investigate and compare the chemical composition of fatty acids and calorific en...

Management of nutrient inputs and usage of nuisance biomass as feedstock for bioenergy may be the solution of coastal lagoons eutrophication. We studied the species composition, photosynthetic pigments (Chl-a and Chl-c) and performance (OJIP-kinetics and JIP-test parameters), biochemistry (lipids and carbohydrates composition), and hydrogen product...

Pollution with copper (Cu), lead (Pb), zinc (Zn), chromium (Cr), and nickel (Ni) heavy metals of the surface sediments collected from three semi-closed East Mediterranean Gulfs, namely Kavala, Strymonikos, and Ierissos Gulfs, North Aegean Sea, Greece, was investigated to evaluate potential benthic ecological risks. The mean concentrations of the st...

Aegean Sea albacore (T. alalunga), fresh or processed, is marketed locally in Greece or exported, mainly to Japan, Italy, Spain, and France. To provide information for consumers and biomonitoring programs and assess the potential human health risks, concentrations of mercury (Hg), cadmium (Cd) and lead (Pb) were determined in albacore edible muscle...

This work demonstrates the tolerance of lichen Pleurosticta acetabulum under extreme conditions, similar to those encountered in extraterrestrial environments. Specifically, the impact of three extreme Mars-like conditions, complete dehydration, extremely low temperature (-196oC/77K) and oxygen depletion on lichens were investigated. The symbiosis...

This report provides data and analysis applying the available DCF data up to 2015. In 2015 the fish processing sector in the EU comprised approximately 3,600 enterprises with fish processing as main activity, 2% more than in 2008. The number of workers employed in the European fish processing industry in 2015 was 124,242, a decrease of 2% compared...

Simultaneous nitrogen depletion and 3,4-dichlorophenol addition induce a bioenergetic microalgal reprogramming, through strong Cyt b6f synthesis, that quench excess electrons from dichlorophenol’s biodegradation to an overactivated photosynthetic electron flow and H2 -productivity. Cellular energy management includes “rational” planning and operat...

60-70% των ψαρικών που καταναλώνονται είναι εισαγόμενα, με τάση συνέχισης της αύξησης των εισαγωγών, κάτι που θα μειώσει περαιτέρω τον βαθμό αυτάρκειας της ΕΕ. Η αυξημένη ζήτηση των αλιευμάτων σε παγκόσμιο επίπεδο εί-ναι αποτέλεσμα τόσο των διαφόρων εκστρατειών προώθησης (promotion campaigns) των προϊόντων, όσο και της "διαπαιδα-γώγησης" των κατανα...

Biofuels are gaining importance as significant substitutes for the depleting fossil fuels. Recent focus is on microalgae as the third generation feedstock. In the present research work, two indigenous fresh water and two marine Chlorophyte strains have been cultivated successfully under laboratory conditions using commercial fertilizer (Nutrileaf 3...

In this study, chemical composition and growth responses of chia plants (Salvia hispanica L.) to inoculation with an arbuscular mycorrhiza (AM, Glomus mosseae, Nicol. & Gerd.) fungal inoculum (namely MC10) under the influence of soil pH were investigated. The experiment project included six treatments, i.e., control-non-arbuscular mycorrhiza fungi...

The 2014 Economic Report on the European Union (EU) fish processing industry provides a comprehensive overview of the latest information available on the structure and economic performance of the sector. The report has been produced by fisheries economists from the JRC and a group of economic experts convened under the Scientific, Technical and Eco...

This study investigates the distribution of heavy metals in the suspended particulate matter and the sediments of Kavala Gulf, located in Northern Greece. Particulate trace metals were determined in accordance to water column physicochemical parameters. Metals in sediments were related to the textural characteristics, the organic matter, and carbon...

A total of 96 street dusts and 96 roadside soils have been sampled from three different localities (urban, industrial, peripheral) of the city of Kavala (Greece) and analyzed for Pb, Cu, Zn, Ni, Cr, Cd, As and Hg using the atomic absorption spectrophotometric method. Results showed that dust and soil samples from the urban and industrial area conta...

Chemical, microbial and sensory quality indices of raw and marinated sea urchin Paracentrotus lividus Lamark, 1816, were determined. Marinades were prepared using three different formulations and stored over a 75-day period at 6 °C, under vacuum and air (control) packaging conditions. Significant differences were found between chemical (pH, moistur...

Chemical, microbial and sensory quality aspects of the marinated ascidia Microcosmus sabatieri Roule, 1885, were examined over a 150-day period at 6 °C, under vacuum and air (control) packaging conditions using three different formulations (with 12% sodium chloride and 3%, 5% or 7% acetic acid). Significant differences were found between chemical a...

1.The variation of structural (multi-dimensional scaling plot of Bray–Curtis similarity, species number, Shannon–Weaver index, percentage coverage) and functional (Ecological State Group (ESG) I percentage coverage, ESG II percentage coverage, Ecological Evaluation Index (EEI)) metrics in benthic macrophyte communities was studied in two different...

The shelf life of fresh eel in various packaging conditions of atmospheric air, vacuum and modified atmosphere packaging (MAP) (40% CO(2), 30% N(2) and 30% O(2)) at 0 degrees C was investigated. All raw eel samples received acceptable sensory scores during the first 11+/-1 days of storage in atmospheric air, 11+/-1 days of storage in vacuum and fin...

The effect of initial head-spaces of atmospheric air, vacuum and modified atmospheres packaging (50% CO2/50% N2) on microbiological, physicochemical and sensory changes of chub mackerel (Scomber colias japonicus) was studied at 3 and 6 °C. The microbial flora of chub mackerel comprised mainly lactic acid bacteria, Brochothrix thermosphacta (Gram-po...

The self-life, quality and safety of refrigerated sardine fillets (Sardina pilchardus) were determined at 3 °C in atmospheric air, vacuum and modified atmosphere (50% CO2/50% N2) packaging conditions. Microbiological, physico-chemical and sensory parameters were utilised as quality indicators. The microbial flora of sardine comprised—according to o...

Sediment and suspended particulate matter samples from 24 stations in the Gulf of Kavala have been examined for lead contamination. Grain size analysis and organic matter content were also performed. Total -- anthropogenic sediment lead concentrations and enrichment factors at stations close to harbors and chemical industries were found higher (up...

The results of an intensive monitoring study of main eutrophication parameters in relation to fish farming management, climate and hydrography in the Vassova coastal lagoon (Nestos Delta) are pre- sented. The overall aim is to produce basic knowledge in order to contribute to the management of eutrophication of coastal lagoons at local and national...

The economic and social indices for the year 2003 of the Greek seafood exploitation sector, composed of 157 small to medium-sized enterprises (SME's) is investigated in this paper. The economic state concerns the number of SME's, their activities and some fundamental financial indices, e.g. quantity and value of purchased raw material per species,...

The results of a systematic and intensive nutrient monitoring program are reported, which took place during the period 1997–1999 in Kavala Gulf, Northern Greece, having as a general task to study the impact of the various human activities on the nutrient loadings and cycling of the aquatic environment. A nutrient budget box model was used to estima...

The ecological evaluation index (EEI) was designed to estimate the ecological status of transitional and coastal waters. Marine benthic macrophytes (seaweeds, seagrasses) were used as bioindicators of ecosystem shifts due to anthropogenic stress, from the pristine state with late-successional species (high ecological status class (ESC)) to the degr...

Surface sediment samples from Strymonikos and Ierissos Gulfs were analyzed for Cu, Pb, Zn, Cr and Ni. The results showed that the sediment of Ierissos Gulf is more polluted with Cu, Pb, and Zn as compared to that of Strymonikos Gulf. The benthal area located off the load-out facility of the mining operations in the town of Stratoni, in Ierissos Gul...

A model to estimate the ecological status and identify restoration targets of transitional and coastal waters was developed. Marine benthic macrophytic species (seaweeds, seagrasses) were used to indicate shifts in the aquatic ecosystem from the pristine state with late-successional species (Ecological State Group I) to the degraded state with oppo...

Dissolved nutrients, chlorophyll-α, salinity and temperature were measured at three inshore stations of Strymonikos Gulf in order to monitor the eutrophication process. Monthly samplings were carried out for the period from December 1997 to June 1999. High mean concentrations of dissolved inorganic nitrogen (144.3 μg 1-1), soluble reactive phosphor...

The alteration of environmental conditions, under the influence of drainage canals and the intensification of agriculture in the recent years, seems to be responsible for the water quality variability at the lagoons Vassova and Eratino, Northern Greece. The stabilization and reclamation of the lagoonal ecosystem demands the improvement of the bioto...

The altération of environmental conditions, under the influence of drainage canals and the intensification of agriculture the latest years, seems to be responsible for the qualitative change of fisheries at the lagoons Vassova and Eratino, Northern Greece. We hâve used a number of water quality parameters (température, salinity, nutrients) at selec...

Experiment und Theorie ergeben übereinstimmend, daß Vier‐ und Fünfringe mit zwei benachbarten Boratomen – wie entsprechende Dreiringe – die nichtklassischen Formen 1 bzw. 2 mit B‐H‐B‐Brücke bevorzugen, wenn der Elektronenmangel an den Boratomen nicht durch Donor‐Substituenten herabgesetzt ist. magnified image

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Deshielding of the tricoordinated C atom, a ring inversion barrier of approximately 8 kcal mol⁻¹ (Olah et al. determined a value of 8.4 kcal mol⁻¹ for the parent compound of 1), a shorter BB distance, and folding as in 1 and 2 (substituents here not defined) prove that 3 is homoaromatic. Very similar data were obtained for the parent compound C2B2H...

Entschirmung des trikoordinierten C-Atoms, eine Ringinversionsbarriere von ca. 8 kcalmol⁻ (für die Stammverbindung von 1 hatten Olah et al. 8.4 kcalmol⁻¹ ermittelt), ein kurzer B-B-Abstand und eine Faltung wie in 1 und 2 (Substituenten hier nicht spezifiziert) belegen die Homoaromatizität von 3. Sehr ähnliche Daten wurden für die Stammverbindung C2...

Carborane 1 and organoborane 2 are in equilibrium in solution. This is deduced from the temperature dependence of the position of the B-11 and C-13 NMR signals of 1 (R = tBu or mesityl). An estimation of the thermodynamic parameters shows that the energy difference between 1 and 2 (1 - 2 kcal mol-1) is significantly less than for the parent compoun...

Das Carboran 1 und das Organoboran 2 stehen in Lösung miteinander im Gleichgewicht, wie aus der Temperaturabhängigkeit der La ge der ¹¹ B– und ¹³ C‐NMR‐Signale von 1 (R = t Bu oder Mesityl) folgt. Eine Abschätzung der thermodynamischen Parameter zeigt, daß die Energiedifferenz zwischen 1 und 2 (1–2 kcal mol ⁻¹ ) erheblich kleiner ist als bei den St...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Stabilized by four beta-silyl groups through hyperconjugation, 1 is the first vinyl cation without pi-conjugation to be detected by NMR. The C-13 NMR spectrum of 1 at 130-degrees shows separate signals for the two silyl groups on the methine C atom. Ab initio MO calculations on model systems showed that hyper-conjugation controls this hindered rota...

Stabilized by four β-silyl groups through hyperconjugation, 1 is the first vinyl cation without π conjugation to be detected by NMR. The 13C-NMR spectrum of 1 at -130o C shows separate signals for the two silyl groups on the methine C atom. Ab initio MO calculations on model systems showed that hyperconjugation controls this hindered rotation, resu...