Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "sea water" wg kryterium: Temat


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:
Budget of 90Sr in the Gulf of Gdansk (Southern Baltic Sea)
Autorzy:
Saniewski, M.
Zalewska, T.
Powiązania:
https://bibliotekanauki.pl/articles/47421.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Gdansk Gulf
Baltic Sea
radioactivity
90 strontium
sediment deposition
sea water
atmospheric deposition
radionuclide
budget
Źródło:
Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of petroleum pollutants in coastal waters of the Gulf of Gdańsk
Autorzy:
Stelmaszewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/48150.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
oil content
pollutant determination
fluorescence
coastal water
Gdansk Gulf
petroleum substance
sea water
petroleum pollution
Opis:
The paper presents an improved method of determining petroleum pollutants in water based on fluorescence, which allows the oil content to be estimated with an accuracy better than 50%. The method was used to measure the oil content in Gulf of Gdańsk seawater sampled at Gdynia-Orłowo between January 2006 and September 2008. The 174 measurements made during this period ranged from 1 to 120 μg kg−1, but the majority did not exceed 20 μg kg−1. The most probable level of contamination is c. 5 μg kg−1.
Źródło:
Oceanologia; 2009, 51, 1; 85-92
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of cyanotoxins, microcystin-LR, microcystin-RR and nodularin in seawater and BG-11 medium of different salinity
Autorzy:
Mazur, H.
Plinski, M.
Powiązania:
https://bibliotekanauki.pl/articles/48388.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
cyanotoxin
microcystin-LR
biodegradation
microcystin-RR
Gdansk Gulf
Cyanoprokaryota
hepatotoxin
sea water
nodularin
Opis:
Microcystins and nodularin are potent hepatotoxins produced by fresh and seawater cyanobacteria.T he persistence of three hepatotoxins – microcystin-LR, microcystin-RR and nodularin – was investigated in sterile BG-11 medium of different salinity and in water collected from the Gulf of Gdańsk.After 21 days of incubation at 17±1◦ C and constant illumination of about 40 μmol photon m−2 s−1 the concentration of toxins decreased by about 30–37%.N o significant changes in toxin concentration in the BG-11 media of different salinity were observed. When toxins were incubated in non-sterile seawater, their concentrations decreased markedly.It is likely that some strains of bacteria are responsible for the breakdown of the toxins.No dularin turned out to be more resistant to biodegradation than the two microcystins.The influence of certain components of cyanobacteria cells on the accelerated rate of toxin degradation was also considered.
Źródło:
Oceanologia; 2001, 43, 3; 329-339
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Qualitative and quantitative analysis of Baltic phytoplankton pigments
Autorzy:
Ston, J.
Kosakowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/49132.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
pigment
qualitative analysis
sea water
quantitative analysis
photosynthetic carotenoid
Baltic Sea
Gdansk Gulf
phytoplankton
chlorophyll
photoprotecting carotenoid
Opis:
The paper presents the results of research into the pigment composition of seawater samples taken from various depths in the Gulf of Gdańsk in April and September 1999. Pigments were separated by RP–HPLC, and identification was confirmed by co-injection with reference standards and on-line diode array spectra. The following groups of pigments were identified: chlorophylls: a, b, c1 + c2; photosynthetic carotenoids (PSC) – peridinin, fucoxanthin, α-carotene; photoprotecting carotenoids (PPC) – diadinoxanthin, alloxanthin, zeaxanthin, lutein, neoxanthin, violaxanthin and β-carotene. Quantitative and qualitative diversity in pigment characteristics were observed in both seasons, though lutein and α-carotene were not identified in the September samples. The respective April and September concentrations of the functional groups of pigments were: total chlorophylls content 0.47–104.25 and 0.57–13.66 μg dm−3; PSC 0.07–21.23 and 0.02–1.56 μg dm−3; PPC 0.05–14.08 and 0.04–1.79 μg dm−3. Within the PSC group, peridinin and fucoxanthin were dominant in the April samples, but only fucoxanthin in the September ones. Among the PPCs, diadinoxanthin and alloxanthin were dominant in April, zeaxanthin in September. Photosynthetic and photoprotecting carotenoids display a linear correlation with chlorophyll a content in all the samples.
Źródło:
Oceanologia; 2000, 42, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tracking trends in eutrophication based on pigments in recent coastal sediments
Autorzy:
Szymczak-Zyla, M.
Krajewska, M.
Winogradow, A.
Zaborska, A.
Breedveld, G.D.
Kowalewska, G.
Powiązania:
https://bibliotekanauki.pl/articles/48555.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
eutrophication
sea water property
pigment
marker
coastal area
sediment
chloropigment
Gdansk Gulf
Norwegian fjord
Opis:
Eutrophication in two different coastal areas — the Gulf of Gdańsk (southern Baltic) and the Oslofjord/Drammensfjord (Norway) — both subject to human pressure and with restricted water exchange with adjacent seas, was investigated and compared. Sediment cores (up to 20 cm long) were collected at 12 stations using a core sampler, 6 in each of the two areas, and divided into sub-samples. The physicochemical parameters characterizing the adjacent water column and near-bottom water, i.e. salinity, oxygen concentration and temperature, were measured during sample collection. Chlorophylls-a, -b and -c, their derivatives and selected carotenoids were determined for all the samples, as were additional parameters characterizing the sediments, i.e. Corg, Ntot, d13C and d15N, grain size. 210Pb activity was also determined and on that basis sediment mixing and accumulation rates were estimated. The distribution of pigments in sediments was related to environmental conditions, the sampling site location and sediment characteristics. The results are in agreement with other observations that eutrophication in the Gulf of Gdańsk has increased, especially since the 1970s, whereas in the Oslofjord it decreased during the same period. The pigments are better preserved in inner Oslofjord sediments than in those from the Gulf of Gdańsk. The results demonstrate that the sum of chloropigments-a insediments calculated per dry weight of sediments is a valuable measure of eutrophication, providing that the monitoring site is selected properly, i.e. sediments are hypoxic/anoxic and non-mixed. Besides, the results confirm previous observations that the percentages of particular chlorophyll-a derivatives in the sum of chloropigments-a are universal markers of environmental conditions in a basin. The ratios of chloropigments-b and chlorophylls-c to the sum of chloropigments-a (SChlns-b/ SChlns-a; Chls-c/SChlns-a) may by applied as complementary markers of freshwater and marine organic matter input, respectively.
Źródło:
Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of natural surfactants present in sea waters at surfaces of minerals: contact angle measurements
Autorzy:
Mazurek, A.
Pogorzelski, S.J.
Boniewicz-Szmyt, K.
Powiązania:
https://bibliotekanauki.pl/articles/48416.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
mineral
Baltic Sea
natural surfactant
solid-liquid interface
Gdansk Gulf
film pressure
contact angle hysteresis
film-covered surface
sea water
adsorption
Opis:
The wetting properties of solid mineral samples (by contact angles) in original surfactant-containing sea water (Gulf of Gdańsk,Ba ltic) were characterised under laboratory conditions on a large set (31 samples) of well-classified stones of diverse hydrophobicity using the sessile drop (ADSA-P approach),ca ptive bubble and inclined plate methods. An experimental relation between the static contact angle θeq and stone density ρ was obtained in the form θeq = Bρ + C,wher e B = 12.23 ± 0.92, C = −(19.17 ± 0.77),an d r2 = 0.92. The histogram of θeq distribution for polished stone plates exhibited a multimodal feature indicating that the most abundant solid materials (hydrophilic in nature) have contact angles θeq = 7.2,10. 7,15. 7 and 19.2◦,whic h appear to be applicable to unspecified field stones as well. The contact angle,a pH-dependent quantity,ap pears to be a sensitive measure of stone grain size,e.g . granite. The captive bubble method gives reproducible results in studies of porous and highly hydrophilic surfaces such as stones and wood. The authors consider the adsorption of natural sea water surfactants on stone surfaces to be the process responsible for contact angle hysteresis. In the model,an equation was derived for determining the solid surface free energy from the liquid’s surface tension γLV; it also enabled the advancing θA and receding θR contact angles of this liquid to be calculated. Measurements of contact angle hysteresis Δθ(= θA − θR) with surfactant-containing sea water and distilled water (reference) on the same stone surfaces allowed the film pressure ΔΠ (1.22 to 8.80 mJ m−2), solid surface free energy ΔγS (−17.03 to −23.61 mJ m−2) and work done by spreading ΔWS (−1.23 to −11.52 mJ m−2) to be determined. The variability in these parameters is attributed to autophobing,an effect operative on a solid surface covered with an adsorptive layer of surfactants. The wetting behaviour of solid particles is of great importance in numerous technological processes including froth flotation,d emulgation,an ti-foaming procedures and the coal industries. It is believed that the approach presented here and the examples of its application to common sea water/solid mineral systems could be successfully adapted to optimise several surfactant-mediated adsorption processes (see below) of practical value in natural water ecology.
Źródło:
Oceanologia; 2009, 51, 3; 377-403
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new predatory cladoceran Cercopagis (Cercopagis) pengoi (Ostroumov 1891) in the Gulf of Gdańsk
Autorzy:
Bielecka, L.
Zmijewska, M.I.
Szymborska, A.
Powiązania:
https://bibliotekanauki.pl/articles/48376.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cercopagidae
water temperature
crustacean
plankton
Caspian Sea
Baltic Sea
zooplankton
water body
Finland Gulf
new species
Riga Gulf
Gdansk Gulf
Podonidae
Cercopagis pengoi
Opis:
Cercopagis pengoi, a species native to the Ponto-Caspian area, was recorded for the first time in the Baltic Sea in the Gulf of Riga and in the open Gulf of Finland in 1992. Sampling in the shallow coastal area of the western part of the Gulf of Gdańsk at weekly intervals between April 1999 and April 2000 revealed the presence of C. pengoi in the zooplankton community. The species was recorded twice, at densities of 1369 indiv. m−3 on 30 July 1999 and 421 indiv. m−3 on 5 August 1999, when the water temperature was at its maximum, in excess of 21.7◦C and 23.9◦C respectively. C. pengoi had never been recorded in the Gulf of Gdańsk prior to 1999.
Źródło:
Oceanologia; 2000, 42, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaemon elegans - a new component of the Gulf of Gdańsk macrofauna
Autorzy:
Janas, U.
Zarzycki, T.
Kozik, P.
Powiązania:
https://bibliotekanauki.pl/articles/48380.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
coastal water
Palaemon elegans
macrofauna
Baltic Sea
Gdansk Gulf
prawn
Opis:
The present paper reports on the occurrence of the prawn Palaemon elegans Rathke in the coastal waters of the Gulf of Gdańsk in the years 2002–2003, and in other regions of the Baltic Sea as recorded by various authors.
Źródło:
Oceanologia; 2004, 46, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability in the saline water exchange between the Baltic and the Gulf of Gdańsk by the σ-coordinate model
Autorzy:
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/48078.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
coastal zone
variability
thermohaline variability
water exchange
saline water
Baltic Sea
mass exchange
Gdansk Gulf
Opis:
A three-dimensional baroclinic σ–coordinate model was applied to study the circulation and thermohaline variability in the coastal zone in the south-eastern Baltic Sea. The model is based on the Princeton Ocean Model code of Blumberg & Mellor (1987), known as POM, and has the horizontal resolution of ∼5 km and 24 σ-levels in the vertical. The hydrodynamic conditions and variability of water and salt exchange between the Gulf of Gdańsk and the Baltic Proper, and the renewal of water masses in the Gulf of Gdańsk due to atmospheric forcing are analyzed. The numerical simulations were performed with real atmospheric forcings as well as with homogeneous (spatially uniform) wind fields over the whole Baltic Sea. The numerical simulations showed that the atmospheric forcing (winds) can play a significant role in shaping the renewal of bottom saline waters in the Gulf of Gdańsk. Two regions of inflow/outflow of saline waters responsible for the salinity regime were located. The overall water exchange between the Gulf and the Baltic Proper as well as the exchange of saline bottom waters appear to be strongly dependent on wind conditions. The net flux of water of salinity >9 PSU is of the order of 48 000–100000 m3 s−1. SE, E, S and NE winds were found to exert the greatest influence on salinity conditions in the Gulf of Gdańsk. Estimates of saline (salinity >9 PSU) water residence time based on the model simulation yielded values from 46 days for SE winds to 153 days for NW winds.
Źródło:
Oceanologia; 2003, 45, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The first observed bloom of the diatom Dactyliosolen fragilissimus (Bergon) Hasle 1996 in the Gulf of Gdańsk
Autorzy:
Lotocka, M.
Powiązania:
https://bibliotekanauki.pl/articles/47455.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
biomass
coastal water
bloom
Baltic Sea
phytoplankton
Gdansk Gulf
diatom
Dactyliosolen fragilissimus
Opis:
The diatom Dactyliosolen fragilissimus (Bergon) Hasle 1996 (syn. Rhizosolenia fragilissima Bergon 1903) occurs in the western Baltic Sea predominantly in summer, sometimes forming blooms. In autumn 2005, numerous D. fragilissimus cells were observed for the first time in the coastal waters of the Gulf of Gdańsk. In November 2005a bloom was formed: at its peak, the diatom count was 1.1×106 cells dm−3 and its biomass was 8.9 mg dm−3.
Źródło:
Oceanologia; 2006, 48, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on benthic Naididae (Annelida, Clitellata) in Polish brackish waters
Autorzy:
Marszewska, L.
Dumnicka, E.
Normant-Saremba, M.
Powiązania:
https://bibliotekanauki.pl/articles/47963.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Oligochaeta
macrozoobenthos
Gdansk Gulf
Baltic Sea
brackish water
new data
Naididae
Annelida
Clitellata
Opis:
This paper presents new findings on oligochaete species inhabiting Polish brackish waters. Identification of 455 specimens collected in September 2013 and July 2014 during the macrozoobenthos survey in the Port of Gdynia (the Gulf of Gdańsk, the southern Baltic Sea, Poland) showed the presence of six species belonging to two subfamilies Naidinae and Tubificinae.
Źródło:
Oceanologia; 2017, 59, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Large red cyanobacterial mats (Spirulina subsalsa Oersted ex Gomont) in the shallow sublittoral of the Southern Baltic
Autorzy:
Wlodarska-Kowalczuk, M.
Balazy, P.
Kobos, J.
Wiktor, J.
Zajaczkowski, M.
Moskal, W.
Powiązania:
https://bibliotekanauki.pl/articles/48400.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cyanoprokaryota
Spirulina subsalsa
diatom
nematode
algal mat
Baltic Sea
Gdansk Gulf
coastal water
Źródło:
Oceanologia; 2014, 56, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hemimysis anomala G.O. Sars, 1907 (Crustacea, Mysidacea) - first record in the Gulf of Gdańsk
Autorzy:
Janas, U.
Wysocki, P.
Powiązania:
https://bibliotekanauki.pl/articles/47696.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
coastal water
Mysidacea
Baltic Sea
Gdansk Gulf
Hemimysis anomala
Crustacea
non-indigenous species
Opis:
The present paper reports on the occurrence of Hemimysis anomala G.O. Sars, 1907 (Crustacea, Mysidacea) in the coastal waters of the Gulf of Gdańsk in the years 2002–2005.
Źródło:
Oceanologia; 2005, 47, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Canthaxanthin in recent sediments as an indicator of heterocystous cyanobacteria in coastal waters
Autorzy:
Krajewska, M.
Szymczak-Zyla, M.
Kobos, J.
Witak, M.
Kowalewska, G.
Powiązania:
https://bibliotekanauki.pl/articles/47440.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Cyanoprokaryota
chlorophyll a
coastal water
carotenoid
chloropigment
canthaxanthin
Gdansk Gulf
Baltic Sea
recent sediment
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies