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Wyświetlanie 1-15 z 68
Tytuł:
Determination of metals in sea water of the Baltic Sea in Międzyzdroje
Autorzy:
Daniszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/412273.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
toxic heavy metals
sea water
Baltic Sea
Opis:
The present research work deals with the quantification of toxic heavy metals in the water samples collected from sea water in Międzyzdroje. While the annual average concentration of Cadmium was calculated as 0.44 ppm in 2008 of the year and 0.46 ppm in 2009 of the year. The values obtained were found to be below the permissible limit of 2.0 ppm set for inland surface water. While the annual average concentration of Chromium was calculated as 2.67 ppm in 2008 of the year and 2.64 ppm in 2009 of the year. Which was very much above the permissible limit of 0.1 ppm set for inland surface water. The observed annual average concentration of Copper in the water was 0.08 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was below the permissible limit of 3.0 ppm set for inland surface water. While the annual average concentration of Mercury was calculated as 0.05 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which was very much above the maximum limit of 0.01 ppm set for inland surface water. The annual average concentration of Nickel in the water samples was observed to be 2.47 ppm in 2008 of the year and 2.70 ppm in 2009 of the year, which is close to the limit of 3.0 ppm set for inland surface water. The annual average concentration of Lead in the water samples was observed to be 0.06 ppm in 2008 of the year and 0.05 ppm in 2009 of the year, which is above the permissible limit of 0.1 ppm set for inland surface water. The results of the present investigation indicate that the annual average concentration of Zinc in water samples was 3.45 ppm in 2008 of the year and 3.73 ppm in 2009 of the year, which is above the permissible limit of 5.0 ppm set for inland surface water.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 13; 13-22
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
12-hour cycle of matter transformation in the sea surface microlayer in the offshore waters of the Gdańsk Basin (Baltic Sea) during spring
Autorzy:
Falkowska, L.
Powiązania:
https://bibliotekanauki.pl/articles/48216.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
nutrient
matter transformation
spring
sea water
Baltic Sea
microlayer
sea surface
Gdansk Basin
Opis:
Short-term measurements of nutrient and DOC concentrations and suspended matter (particles, chlorophyll a, phaeophytin, algae and ATP concentrations) carried out in seawater layers of varying thickness (10, 90, 250 μm and the underwater layer – 15 cm depth) in spring form the basis for a discussion of the diurnal fluctuations of nutrient and suspended organic matter concentrations. Quantitative and qualitative differences in the composition of neuston species were recorded in selected sub-layers of the chemically stratified sea surface microlayer. The non-linear regression equation was applied in a mathematical model of the diurnal fluctuations of nutrients and organic matter. Two maxima and two minima were found in the diurnal cycle of nutrient concentrations and organic suspensions in sub-layers of different thickness selected from the sea surface. The first maximum, expressed by the proliferation of phytoneuston, lasted from the very early morning till mid-morning. The second maximum occurred in the afternoon. The chlorophyll a concentration, and ATP and neuston abundance declined markedly around noon, when the biologically-damaging radiation dose increased, compelling the downward migration of organisms. At the same time, the photo-oxidation of dissolved organic matter intensified and the concentrations of inorganic forms of nitrogen and phosphorus rose. A shift (up to 2 h) between the maximum and minimum neuston concentration in these sea surface layers was indicative of phototaxis occurring within the entire surface microlayer and in the underwater layer. After sunset the decline in phytoneuston abundance could be related to zooplankton grazing as well as to respiratory breakdown.
Źródło:
Oceanologia; 2001, 43, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal and spatial variability of surface seawater fluorescence properties in the Baltic and Nordic Seas: results of lidar experiments
Autorzy:
Drozdowska, V.
Powiązania:
https://bibliotekanauki.pl/articles/47809.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
chlorophyll a
fluorescence
spatial variability
blossoming period
sea water
seasonal variation
Baltic Sea
lidar
Nordic Sea
Opis:
The paper analyses experimental measurements of laser-induced fluorescence (LIF) spectra in different seawaters. The fluorescence parameters, calculated from LIF spectra as the ratio of the integrals of fluorescence and Raman signal intensities, provide information about the relative changes in the concentrations of fluorescing molecules. Gathered during several cruises in 1994–2004 in the Baltic and Nordic Seas, all the data are presented as scatter plots of the fluorescence parameters of chlorophyll a (Chl a) and coloured dissolved organic matter (CDOM). Satisfactory correlations between these two parameters were found a) for open Nordic Seas waters, b) for the southern Baltic in blooming periods only, and c) for the Gulf of Gdańsk in non-blooming periods only.
Źródło:
Oceanologia; 2007, 49, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibiotic resistance of fecal coliform bacteria inhabiting sea water and sand of marine recreation beach in the southern Baltic Sea
Antybiotykooporność bakterii kałowych z grupy coli zasiedlających wodę morską i piasek rekreacyjnej plaży na obszarze Bałtyku Południowego
Autorzy:
Mudryk, Z.J.
Perlinski, P.
Robak, D.
Powiązania:
https://bibliotekanauki.pl/articles/84879.pdf
Data publikacji:
2016
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
antibiotic resistance
fecal coliform bacteria
sea water
sand
sea beach
recreation beach
Baltic Sea
coliform bacteria
Opis:
The results of the present study showed variability in resistance of FC bacteria isolated from beach sand and sea water against tested antibiotics. Enteric bacteria were the most resistant to clindamycin and penicillin while the most sensitive to ciprofloxacin, gentamycin, neomycin, rifampicin and streptomycin. Fecal coliform bacteria inhabiting sand were more resistant to nearly all tested antibiotics compared to bacteria isolated from sea water. The majority of bacteria inhabiting sea water and sand of the studied beach were resistant to only 1-4 antibiotics out of the 12 antibiotics tested. Fecal coliform bacteria isolated from Ustka beach were the most resistant to β-lactam and lincosamide antibiotics, while the most susceptible to aminoglycosides.
Badano oporność na antybiotyki bakterii fekalnych wyizolowanych z wody morskiej i piasku rekreacyjnej plaży znajdującej się na południowym wybrzeżu Morza Bałtyckiego. Uzyskane wyniki badań wykazały zmienność w oporności bakterii z grupy coli wyizolowanych z piasku i wody morskiej wobec badanych antybiotyków. Mikroorganizmy te były najbardziej odporne na penicylinę i klindamycynę, a najbardziej wrażliwe na ciprofloksacynę, gentamycynę, neomycynę, ryfampicyny i streptomycyny. Bakterie kałowe z grupy coli zasiedlające piasek były bardziej odporne na prawie wszystkie badane antybiotyki niż te izolowane z wody morskiej. Większość bakterii zasiedlających wodę morską i piasek badanej plaży była odporna na zaledwie 1-4 antybiotyków z 12 badanych. Bakterie kałowe z grupy coli izolowane na plaży w Ustce były najbardziej oporne na antybiotyki beta-laktamowe oraz linkozamidy, a najbardziej podatne na aminoglikozydy.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2016, 20
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationships between water temperature, nutrients and dissolved oxygen in the Northern Gulf of Aqaba, Red Sea
Autorzy:
Manasrah, R.
Raheed, M.
Badran, M.I.
Powiązania:
https://bibliotekanauki.pl/articles/49092.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
stratification
nutrient
Aqaba Gulf
temperature
sea water
Red Sea
oxygen
Opis:
Five years (1998, 2000–2003) of summer records of temperature, nutrients and dissolved oxygen concentrations in the upper 400 m of the water column of the northern Gulf of Aqaba were employed to produce a simple statistical model of the relationship between temperature versus nitrate, phosphate, silicate andd issolved oxygen concentrations. Temperature profiles in the upper 400 m during summer revealeda clear thermocline in the upper 200 m. This was reflected in nutrient ando xygen concentrations as nitrate, phosphate, and silicate increasedfr om the surface to deep water while dissolved oxygen decreased. The best fit relationship between temperature versus nitrate andphosphate was inverse linear and the best fit correlation between temperature versus silicate andd issolvedo xygen was fractional. The observedn utrient concentrations were shaped by a combination of the hydrodynamics and biological factors. Deep winter mixing and high nutrient concentrations dominate during winter. Shortly after the water stratifies in spring, the nutrients are drawn down by phytoplankton during the spring bloom and remain low throughout the rest of the year. The regression equations presented here will be useful in estimating nutrient concentrations from temperature records as long as the annual natural cycle is the main driver of nutrient concentrations and external inputs are insignificant. Deviations from these relationships in the future could provide insight into modifications in the nutrient concentrations probably resulting from new nutrient sources, such as anthropogenic inputs.
Źródło:
Oceanologia; 2006, 48, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light scattering in Baltic crude oil - seawater emulsion
Autorzy:
Stelmaszewski, A.
Krol, T.
Toczek, H.
Powiązania:
https://bibliotekanauki.pl/articles/47707.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
marine environment
sea water emulsion
Baltic Sea
light scattering
sea water
Baltic crude oil
petroleum
Opis:
The paper discusses the scattering of radiation by a Baltic crude oil –sea water emulsion. The scattering spectrum calculated using the Mie solution in the spectral range from 380 nm to 730 nm is compared with the measured spectrum of light scattered through a right angle. Spectra in the wavelength range from 210 nm to 730 nm were measured using a spectrofluorimeter for fresh and stored samples of the Baltic crude oil emulsion. Scattering increases with wavelength in the UV range and then decreases slightly with the wavelength of visible light. The result of the calculation is similar to the measured spectra. Both the calculated and measured spectra display numerous relative extremes throughout the spectral area. Light scattering in the emulsion decreases during storage as the oil concentration in the medium diminishes. The results also demonstrate that the single scattering model describes the phenomenon correctly.
Źródło:
Oceanologia; 2009, 51, 3; 405-414
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Currents in the open Baltic Sea measured during POLRODEX 97 experiment preliminary interpretation
Autorzy:
Kaźmierski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1920448.pdf
Data publikacji:
1999
Wydawca:
Instytut Morski w Gdańsku
Tematy:
POLRODEX
sea water
Opis:
The paper presents analysis of cun·ents and other physical parameters of sea water: salinity, temperature, and water level. The measurements were made in the north - western part of the Gdansk Bay during POLRODEX '97 experiment took place. Measured data are described, and their preliminary interpretation is given. Periodicity of currents and temperature oscillations is especially underlined.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 1999, 26, 1; 69-75
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Monosaccharides in the water of the Gulf of Gdańsk
Autorzy:
Grzybowski, W.
Maksymiuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/47542.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
organic matter
saccharide
monosaccharide
sea water
organic carbon
Baltic Sea
Gdansk Gulf
Opis:
The concentration of monosaccharides in samples collected in the Gulf of Gdańsk area was determined in water filtered through ∼0.8 μm pore size filters. Seawater concentrations ranged from about 0.2 to 1.1 mg C dm−3, the highest values being detected at the mouth of the river Vistula. Seasonality was detectable in the data distribution; the majority of autumn values lay within the 0.2–0.4 range while concentrations in the spring samples were higher and the values more widely scattered. Measurements of monosaccharide concentrations at selected points during the whole observation period showed that values increased from spring to autumn as much as 5-fold. Concomitant analyses in Vistula river water yielded concentrations from 0.4 to 1.2 mg C dm−3. These latter values were all higher than those recorded in seawater in the corresponding months.
Źródło:
Oceanologia; 2001, 43, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microfouling development on artificial substrates deployed in the central Red Sea
Autorzy:
Balgadi, A.A.
Salama, A.J.
Satheesh, S.
Powiązania:
https://bibliotekanauki.pl/articles/47499.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
microfouling
biofilm
nutrient cycling
diatom
sea water
winter
summer season
Red Sea
Saudi Arabia
Źródło:
Oceanologia; 2018, 60, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteorological influences on the surface hydrographic patterns of the North Aegean Sea
Autorzy:
Sylaios, G.
Powiązania:
https://bibliotekanauki.pl/articles/48232.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
water mass
Baltic Sea
Aegean Sea
sea water
hydrographic data
wind stress
bottom topography
meteorological influence
hydrographic pattern
Anthos Peninsula
salinity
Opis:
Hydrographic data from the North Aegean Sea were used to examine the summer variability of surface water masses during the period 1998–2001. Attention was placed on the surface hydrographic features of the area, such as the Black Sea Water (BSW) plume expansion, the frontal characteristics of the BSW with the Levantine Intermediate Water (LIW) and the variability of submesoscale hydrographic features (such as the Samothraki Anticyclone). Strong southerly wind stresses were found responsible for relaxing the horizontal density gradients across the BSW-LIW frontal zone and displacing this front to the north of Lemnos Island, thus suppressing the Samothraki Anticyclone towards the Thracian Sea continental shelf. Under northerly winds, the BSW-LIWfront returns to its regular position (south of Lemnos Island), thus allowing the horizontal expansion of the Samothraki gyre up to the Athos Peninsula. Present results indicate the importance of medium-term wind stress effects on the generation of Samothraki Anticyclone suppression/expansion events.
Źródło:
Oceanologia; 2011, 53, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimising the storage and extraction of chlorophyll samples
Autorzy:
Wasmund, N.
Topp, I.
Schories, D.
Powiązania:
https://bibliotekanauki.pl/articles/47427.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
freezing
methodology
extraction
chlorophyll a
sea water
alga culture
Baltic Sea
chlorophyll
storage
Opis:
The effect of different methodological steps on the analysis of chlorophyll a (chl a) was tested with algae cultures and Baltic Sea water. Selected experiments were tested with ANOVAs for significant differences between treatments. The results of the experiments led to the following recommendations: the sample volume should be low so that filtration takes no longer than 10 min. Extracts rather than filters should be stored if storage of the samples at −20◦C is required. However, quickfreezing in liquid nitrogen is recommended. The extraction efficiency was much better in 96% ethanol than in 90% acetone – extraction in the latter solvent requires the filters to be homogenised. The extraction time has no significant influence within a range of 3 to 24 hours if the recommended 96% ethanol is used.
Źródło:
Oceanologia; 2006, 48, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison between stability constants of cadmium and lead complexes with humic substances of different molecular weight isolated from Baltic Sea water
Autorzy:
Grzybowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/47686.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
ultrafiltration
humic substance
sea water
cadmium
complexation
water
Baltic Sea
lead
heavy metal
Opis:
The complexation of cadmium and lead with humic substances was studied using differential pulse anodic stripping voltammetry and a standard addition technique. The titration was done for humic substances of different molecular weight that had been isolated from seawater and subsequently redissolved in organic-free seawater. The different molecular weight fractions were obtained by ultrafiltration using 1000 D (Dalton), 5000 D and 10 000 D pore size filters. Comparison of the calculated stability constants suggests that the strengths of lead complexes in the analysed fractions are similar and that cadmium is complexed by the fraction smaller than 1000 D.
Źródło:
Oceanologia; 2000, 42, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral dependence of the correlation between the backscattering coefficient and the volume scattering function measured in the Southern Baltic Sea
Autorzy:
Freda, W.
Powiązania:
https://bibliotekanauki.pl/articles/47893.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
volume scattering function
backscattering coefficient
marine optics
Baltic Sea
optical property
sea water
spectral variability
Opis:
Direct measurements of the backscattering coefficient bb require the determination of the Volume Scattering Function (VSF) and its integration over a backward hemisphere. In sea water they are difficult and are therefore carried out very rarely. That is why the backscattering coefficient is much more frequently obtained with so-called single angle scattering meters: these operate by measuring the VSF for a fixed angle region of the backward hemisphere. This article examines the spectral variability of the correlation between directly measured backscattering coefficients and VSFs. Also presented are the averaged slopes of VSF spectra, measured in southern Baltic waters over a wide range of scattering angles.
Źródło:
Oceanologia; 2012, 54, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Are poikilothermic animals real hosts for Toxoplasma gondii?
Autorzy:
Długońska, Henryka
Powiązania:
https://bibliotekanauki.pl/articles/972217.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
T. gondii
poikilothermic hosts
sea water
Opis:
The protozoan Toxoplasma gondii is believed to be a common parasite of almost all endothermic animals and humans. However, recent reports of toxoplasmosis in marine mammals raise concern that cold-blooded animals may also be a potential source of T. gondii infection. The article discusses the presence of T. gondii in aquatic and terrestrial poikilothermic animals, which may be important elements in the transmission of the parasite.
Źródło:
Annals of Parasitology; 2017, 63, 1; 3-5
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The history of coastal lakes studies with a special regard to Lake Gardno
Autorzy:
Paturej, E.
Powiązania:
https://bibliotekanauki.pl/articles/84791.pdf
Data publikacji:
2001
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
history
coastal lake
lake
Lake Gardno
Baltic Sea
coastal zone
water exchange
sea water
lake water
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2001, 05
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 68

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