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Tytuł:
Numerical investigation of local heat transfer distribution on surfaces with a non-uniform temperature under an array of impinging jets with various nozzle shapes
Autorzy:
Marzec, K.
Kucaba-Piętal, A.
Powiązania:
https://bibliotekanauki.pl/articles/279593.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
impinging jet
heat transfer
Nusselt number
nozzle shape
Opis:
Numerical calculations of heat transfer characteristics of an impingement cooling system with a non-uniform temperature on a cooled surface using ANSYS CFX have been performed. The influence of a surface heat flux qw(x) and a nozzle shape on the Nusselt number distribution on the cooled surface has been studied. The setup consisted of a cylindrical plenum with an inline array of ten impingement jets. Cylindrical, convergent divergent shapes of nozzles and linear temperature distribution on the cooled surface have been considered for various heat fluxes qw (x). Results indicate that geometry of the cylindrical nozzles resulted in the highest Nusselt numbers along the cooled surface. The line of the averaged Nusselt number has a trend to increase in the direction of the flow for the cooling system with increasing values of the surface heat flux q(x). This tendency can be observed for all presented shapes of jets. On the other hand, for decreasing functions of the heat flux qw (x), the Nusselt number distribution is more uniform. It can be observed for all types of nozzles. Very similar values of the Nusselt number occur especially for the non-uniform heat flux 5000-2500W/m². For constant values of the heat flux q(x) = 5000W/m², the line of the average Nusselt number has a trend to increase slightly in the direction of the flow. Numerical analysis of different mesh density results in good convergence of the GCI index, what excludes mesh size dependency. The presented study is an extension of the paper (Marzec and Kucaba-Piętal, 2016) and aims at answering the question how the Nusselt number distribution on the cooled surface is affected by various geometries of nozzles for a non-uniform surface heat flux qw (x).
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1313-1324
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thin-bedded strata and tuning effect as causes of seismic data anomalies in the top part of the Cenomanian sandstone in the Grobla–Rajsko–Rylowa area (Carpathian foreland, Poland)
Autorzy:
Marzec, P.
Pietsch, K. J.
Powiązania:
https://bibliotekanauki.pl/articles/2060481.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Carpathian Foreland
Cenomanian
direct hydrocarbon indicators
seismic amplitude analysis
tuning effect
Opis:
A high-amplitude anomaly in seismic signal, i.e. a bright-spot, which is the main direct hydrocarbon indicator, may also occur due to interference between the reflected signals from the top and base of a thin bed (the tuning effect). In such settings the main problem is to distinguish amplitude anomalies associated with lithological changes or changes in gas saturation from anomalies originating from the tuning effect. We provide a method of interpreting the composite seismic signal produced by the interference between reflections. Such reflections occur along the top of the Cenomanian sandstone in the area of the Grobla–Rajsko–Rylowa 3-D seismic dataset (southern Poland). The non-standard method presented here is based on interpretation of seismic data which was rotated by 270°. The results of seismic modelling were used to develop criteria for interpretation of such data. These criteria are based on the difference between information carried by the peak-to-trough amplitude and that by the total amplitude of rotated seismic data. The difference was used to define the transfer function and to remove the high-amplitude anomalies caused by the constructive interference between the reflected signals from the top and bottom of the thinning stratum. The final outcome of the study was a map showing the seismic amplitude response at the top Cenomanian reflector unaffected by the tuning effect. The map shows the extent of the area where high-amplitude anomalies do not correspond with changes in thickness and petrophysical parameters within the top part of the Cenomanian. These anomalies are caused by a lateral increase in thickness of the Turonian and/or an increase in the velocity within the bottom part of the Senonian (Coniacian) strata. The map can be used to determine precisely the boundaries of the Rajsko and Rylowa gas reservoirs as well as to locate the potential extension of the reservoir zone to the east of the Rylowa 6 borehole.
Źródło:
Geological Quarterly; 2012, 56, 4; 691--710
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The North European Platform suture zone in Poland
Autorzy:
Golonka, J.
Pietsch, K.
Marzec, P.
Powiązania:
https://bibliotekanauki.pl/articles/184180.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Carpathians
Pieniny Klippen Belt
North European Platform
seismics
tectonics
olistoliths
Opis:
The authors interpret the structure of the Central Carpathian-North European plates suture zone in Poland, where three main Carpathian tectonic units: the Central Carpathian, Pieniny Klippen Belt (PKB) and Outer Carpathian are present. In general, the PKB follows this zone. Several deep bore-holes were drilled in this region and the seismic lines were tied to bore-hole data and geological maps. The Polish PKB belongs to the complex geological structure stretching from Vienna in Austria to Romania. The rocks included in the PKB tectonic components were deposited within the paleogeographic realm known as the Alpine Tethys, mainly during the Jurassic-Early Cretaceous times. Both strike-slip and thrust components occur within the Polish section of the PKB. The strongly tectonized, few kilometer wide PKB zone is limited by a flower structure marked by two major faults, linked to the strike-slip zone. These faults reach the North European Platform (part of the North European Plate). The flysch sequences, arranged into a series of north-vergent thrust-sheets, constitute the main component of the PKB in the survey zone. They contain olistoliths, which are mainly Jurassic-Early Cretaceous in age. The PKB tectonic components of different age, strike-slip, thrust as well as toe-thrusts and olistostromes are mixed together, giving the present-day mélange character of this belt, where individual units are hard to distinguish. Two olistostrome belts (mélange units) exist within the PKB structure. The seismic lines show the Central Carpathian Paleogene rocks covering the Paleozoic Central Carpathian Basement south of the PKB. The Subtatric covers the High-Tatric autochthonic and allochthone rocks. The Central Carpathian Plate is thrust over the North European Platform in the Podhale region. The allochthonous Outer Carpathians consist of several nappes (thrust-sheets) verging northward. They are thrust over each other and over the North European Platform which dips gently southward.
Źródło:
Geology, Geophysics and Environment; 2018, 44, 1; 5-16
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of the sol-gel method at the fabrication of PLZT:Yb3+ ceramics
Autorzy:
Osińska, K.
Płońska, M.
Marzec, A.
Powiązania:
https://bibliotekanauki.pl/articles/353490.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PLZT:Yb3+ ceramics
sol-gel method
perovskite structure ceramics
Opis:
The aim of presented study was to obtain the PLZT:Yb ceramics. Nanopowders of itterbiuni doped PLZT materials were synthesized by the sol-gel method from high quality metaloorganic precursors, as lead (II) acetate, lanthanum acetate, ytterbium acetate, zirconium (IV) propoxide and titanium (IV) propoxide. Anhydrous acetic acid and n-propyl alcohol were used as solvents, while acetyloacetone was added as stabilizer of hydrolysis reactions. Thermal evolution of the dried gels, before and after calcination, was studied by the simultaneous thermal analysis. The amorphous PLZT:Yb3+ gels were first calcined in the furnace at T = 850°C, and then mixed in the planetary ball mill. Additionally, the mean particle sizes were calculated by means of powder specific surface area measurements, based on the BET physical adsorption isotherm. Such obtained powders were subsequently pressed into pellets, and sintered by the free sintering method at temperature T= 1250°C / 6h. The morphology of fabricated PLZT:Yb:3+ ceramic powders and samples was studied using Scanning Electron Microscopy. Chemical characterization of samples was carried on using the Energy-dispersive X-ray spectroscopy – EDS system. Studies provided detailed data concerning die relationships between doping and preparing conditions on the basic physical and chemical properties of obtained ceramic materials.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1441-1446
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of seismic methods to identify potential gas concentration zones at the Zechstein Limestone Level in the "Rudna" mining area, SW Poland
Autorzy:
Dec, J.
Pietsch, K.
Marzec, P.
Powiązania:
https://bibliotekanauki.pl/articles/191658.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
3D seismics
seismic modelling
gas accumulation zones
Zechstein Limestone
"Rudna" copper mine
SW Poland
Opis:
A block development operation at the "Rudna" copper mine (KGHM Polska Miedź S.A.) encountered a "compressed gas trap" that caused the ejection of fragmented rock material into a drift. Faced with a new threat of gas ejection the mine needed to find methods to identify potential gas concentration zones prior to any further exploration work. Surface seismic surveying was chosen as a widely-accepted standard method of investigating rockmass structure and tectonics and pinpointing natural gas deposits. An area of one square kilometre was selected directly above the ejection site, a 3D seismic survey, known as Duża Wólka 3D, was performed and a survey well S-421A was drilled. The objective was to investigate the overall rock structure, especially the structure of Zechstein and top Rotliegendes formations, as well as to attempt identifying anomalous zones, which could be linked with the gas saturation of Ca1 dolomites, on the 3D seismic image at the P1 level (Zechstein/ Rotliegendes boundary). An interpretation of multi-scenario seismic modelling of the recorded data helped to: – recognize the structure and tectonics of the area, including minor faults cutting through the top-level Rotliegendes formations and floor-level Zechstein formations. Such faults could constitute migration channels for Carboniferous-period gases, – locate zones with nearly zero-reflection amplitude at the surface of the top-level Rotliegendes (P1 seismic boundary), which would suggest a reduction of elastic parameters of the Ca1 dolomite. This reduction could be linked to an increased porosity and fracturing of the dolomite and its saturation with gas (a reduction of the seismic wavelet propagation velocity). Credibility of this interpretation is already partly corroborated by data from wells drilled in the Zechstein limestone by the mine. The paper presents the first in the world attempt to use the surface seismic survey for location of zones with small gas concentration in porous rocks at the Zechstein/Rotliegendes boundary. Such zones should not be identified with gas pools that occur in the Zechstein Limestone (Ca1) in the area of the Fore-Sudetic Monocline.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 1; 63-78
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactive metabolites produced by Spirulina subsalsa from the Baltic Sea
Autorzy:
Szubert, K.
Wiglusz, M.
Mazur-Marzec, H.
Powiązania:
https://bibliotekanauki.pl/articles/47501.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
bioactive metabolite
Spirulina subsalsa
Baltic Sea
Cyanoprokaryota
bioremediation
cytotoxic activity
liquid chromatography-tandem mass spectrometry
protease inhibitor
Źródło:
Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Condition of Sanitary Infrastructure in the Parczew District and the Need for its Development
Autorzy:
Micek, A.
Marzec, M.
Jóźwiakowska, K.
Pochwatka, P.
Powiązania:
https://bibliotekanauki.pl/articles/123430.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sanitary infrastructure
commune
water supply system
sewerage system
wastewater treatment plant
septic tank
Opis:
The aim of this paper is to present the current state and the need for development of sanitary infrastructure in the communes of Parczew District, in Lublin Voivodeship. Parczew District encompasses seven communes: Parczew, Dębowa Kłoda, Jabłoń, Milanów, Podedwórze, Siemień, and Sosnowica. The present paper uses the data from the surveys conducted in these communes in 2016. On average, 88% of the population used the water supply system in the communes surveyed, while 48% of the inhabitants were connected to a sewerage system. Parczew District had 12 collective mechanical and biological wastewater treatment plants with a capacity exceeding 5 m3/d. The households which were not connected to the sewerage network discharged the wastewater mainly to non-return tanks. In the communes surveyed, 1,115 households had domestic wastewater treatment plants. All of them were systems with infiltration drainage, which do not ensure high efficiency of removing pollutions and may even contribute to the degradation of the groundwater quality. In order to solve the existing problems of sewage and water management in the communes of Parczew District, it is necessary to further develop the collective sewerage systems and equip the areas which have a dispersed development layout with highly efficient domestic treatment plants, such as constructed wetlands.
Źródło:
Journal of Ecological Engineering; 2018, 19, 5; 107-115
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-reported eating behavior and nutrition knowledge in women starting dietary treatment compared to women who achieve treatment goals for simple obesity
Zachowania żywieniowe i wiedza na temat żywności i żywienia w ocenie kobiet rozpoczynających dietetyczne leczenie w porównaniu do kobiet osiągających cel leczenia otyłości prostej
Autorzy:
Skrzypek, M.
Szczygieł, K.
Fedurek, J.
Marzec, A.
Powiązania:
https://bibliotekanauki.pl/articles/2053983.pdf
Data publikacji:
2020
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
woman’s health
eating behavior
nutrition
obesity
Questionnaire of Eating Behavior
zdrowie kobiet
nawyki żywieniowe
żywienie
otyłość
kwestionariusz QEB
Opis:
Background. The goal of the study was to compare self-reported eating behavior and knowledge of nutrition in cohorts of women with simple obesity, who begin nutritional intervention to treat obesity, and in women who achieved the goal of obesity treatment, i.e. reduction of initial body mass by a minimum of 10%. Material and methods. The study was conducted in a group of 38 women with simple obesity who were starting dietary treatment (aged 18-72, mean 41, SD 14.95) and 49 women with simple obesity, who, as a result of dietary treatment for obesity, achieved a body mass reduction by at least 10% (aged 18-67, mean 41, SD 13.44). The survey also included a control group of 100 women with normal body mass (aged 19-59, mean 33, SD 13.29). The study used the Questionnaire of Eating Behavior. Results. Women with simple obesity starting dietary treatment were characterized by a paradoxically higher intensity of characteristics of a pro-health diet as well as a higher intensity of unhealthy diet characteristics, compared to women with normal body mass. Women starting treatment compared to women who achieved successfully completed treatment, exhibited a significantly lower intensity of pro-health diet characteristics and higher intensity of unhealthy diet characteristics. The level of nutrition knowledge among healthy women was significantly higher compared to obese women starting treatment. The women who achieved the goal of treatment were characterized by a higher level of nutrition knowledge compared to those starting treatment. Conclusions. There are significant differences between the studied cohorts of women in terms of level of nutrition knowledge and eating behaviors associated with dietary treatment for obesity.
Wprowadzenie. Celem pracy było porównanie zachowań żywieniowych oraz wiedzy na temat żywności i żywienia w grupach kobiet z otyłością prostą, rozpoczynających dietetyczne leczenie otyłości oraz kobiet, które osiągnęły cel leczenia otyłości w postaci 10% redukcji wyjściowej masy ciała. Materiał i metody. Badanie zrealizowano w grupie 38 kobiet z otyłością prostą rozpoczynających dietetyczne leczenie otyłości (wiek 18-72 lata, średnio 41, SD 14.95) oraz 49 kobiet z otyłością prostą, które osiągnęły cel leczenia w postaci obniżenia masy ciała o minimum 10% (wiek 18-67 lat, średnio 41, SD 13.44). Dodatkowo w badaniu uwzględniono grupę kontrolną 100 kobiet o prawidłowej masie ciała (wiek 19-59, średnio 33, SD 13.29). W badaniu zastosowano Questionnaire of Eating Behavior. Wyniki. Kobiety z otyłością prostą rozpoczynające dietetyczne leczenie otyłości wykazywały paradoksalnie większe nasilenie prozdrowotnych cech diety, a także większe nasilenie antyzdrowotnych cech diety w porównaniu do kobiet z prawidłową masą ciała. Kobiety rozpoczynające leczenie w porównaniu do tych, które osiągnęły cel leczenia, wykazywały znamiennie niższe nasilenie prozdrowotnych cech diety i większe – antyzdrowotnych cech diety. Poziom wiedzy żywieniowej kobiet zdrowych był znacząco większy niż kobiet z otyłością rozpoczynających leczenie. Kobiety, które osiągnęły cel leczenia cechowały się większą wiedzą żywieniową w porównaniu do rozpoczynających leczenie. Wnioski. Wykazano istotne różnice pomiędzy badanymi kohortami kobiet w zakresie poziomu wiedzy żywieniowej oraz zachowań żywieniowych, powiązane z dietetycznym leczeniem otyłości.
Źródło:
Health Problems of Civilization; 2020, 14, 4; 256-265
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of seismic velocity distribution on the depth imaging of the sub-Zechstein horizons in areas affected by salt tectonics: a case study of NW Poland
Autorzy:
Pietsch, K.
Marzec, P.
Niepsuj, M.
Krzywiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/191765.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
seismic imaging of sub-Zechstein boundaries
velocity models for Zechstein and Mesozoic successions
halokinesis
Mid-Polish Swell
Opis:
Lateral changes in the thickness of strata and petrophysical parameters within the Zechstein succession (salt pillows and domes) can cause many problems in seismic exploration of the aeolian Rotliegend formations, which are prospective for hydrocarbons. An assessment of the influence of halokinesis on the seismic imaging of the sub-Zechstein strata in NW Poland (Obrzycko–Szamotuły area, to the SW of the Mid-Polish Swell) utilised time-to-depth conversion with different, seismic-geological models. Various, seismic velocities were used in models for the Zechstein and the Mesozoic successions, namely velocities, dependent on the thickness of particular rock successions, on their depths, and velocities, determined from seismic inversion. The results show opposite reflection patterns for the seismic section imaged in the time and depth domains. The synclinal arrangement of the strata boundaries in the depth model is represented by convex-upwards reflection events on the seismic section. The pull-up of reflection events, associated with the sub-Zechstein strata, observed on the seismic sections, is mainly a result of both the greater thickness of the Zechstein salt within the salt structures (pillows, diapirs) and the increase in velocity contrast between the salt body and the Mesozoic strata.
Źródło:
Annales Societatis Geologorum Poloniae; 2012, 82, 3; 263--277
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of 2-D forward seismic modelling for impro- ved imaging of sub-salt Rotliegend strata in Polish Basin
Autorzy:
Marzec, P.
Niepsuj, M.
Słonka, Ł.
Pietsch, K.
Powiązania:
https://bibliotekanauki.pl/articles/191858.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
salt and subsalt structures
salt diapirs
seismic methods
seismic modelling
Permian
Polska
Opis:
Forward seismic modelling can aid seismic studies of the pre-Zechstein strata in areas of developed salt tectonics, such as the Obrzycko–Szamotuły region, NW Polish Basin. The results not only can be used for seismic interpretation, but also can support the planning of survey methodology and the workflow of seismic data processing. This paper presents the results of modelling that was carried out, before the acquisition of the regional-scale, seismic line Obrzycko-1–Zabartowo-1–Zabartowo-2 (Górecki, 2010). An interpreted, seismic transect was used to build a basic, seismic-geological model. The modelling was based on seismic ray theory. The zero-offset mo- delling (theoretical wave field) for different geometries of salt structures showed that an increase in salt thickness resulted in a pull-up of reflection events, related to the sub-salt horizons. The incorporation of faults and salt overhangs into a model significantly complicated the seismic wave field. The results of offset modelling, pre- sented in this paper as seismic ray tracing and common-shot gathers, proved that (1) the seismic response of the Rotliegend (Permian) formations can be recorded, despite the presence of the overlying salt pillows and diapirs, if offsets several kilometres long are used, and (2) the complex configuration of seismic reflectors (diapirs with salt overhangs, faults) gives rise to complicated, seismic ray paths that may cause difficulties in common-depth-point stacking and therefore decrease the quality of the seismic records.
Źródło:
Annales Societatis Geologorum Poloniae; 2013, 83, 1; 65-80
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Langmuir Monolayer Characteristics of Erucylphosphocholine - A Novel Anti-Tumor Drug
Autorzy:
Wnętrzak, A.
Łątka, K.
Marzec, M.
Dynarowicz-Łątka, P.
Powiązania:
https://bibliotekanauki.pl/articles/1490116.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.18.-g
Opis:
Erucylphosphocholine, an alkylphosphocholine anticancer drug, was employed for Langmuir monolayer characterization and liquid crystalline studies. Differential scanning calorimetry measurements together with texture observation with polarizing microscope revealed the presence of nematic phase. Film forming properties of erucylphosphocholine at the air/water interface were thoroughly investigated by means of surface pressure-area (π-A) and electric surface potential-area (Δ V-A) isotherms. The influence of such factors as subphase temperature, ionic strength, speed of compression, number of molecules spread at the surface on the characteristics of the π-A isotherms was investigated. Erucylphosphocholine was found to form very stable Langmuir monolayers, which are almost not influenced by experimental conditions. The liquid character of its monolayers was confirmed with both compressibility modulus values and homogeneous Brewster angle microscopy images.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 468-473
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Experimental Conditions on Deposition of Silver Nanoparticles Onto Surface of Graphene Oxide
Wpływ warunków eksperymentalnych na proces osadzania nanocząstek srebra na powierzchni tlenku grafenu
Autorzy:
Wojnicki, M.
Mania, I.
Marzec, M.
Gajewska, M.
Mech, K.
Powiązania:
https://bibliotekanauki.pl/articles/352579.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silver nanoparticles
deposition
graphene oxide
nanocząstki srebra
osadzanie
tlenek grafenu
Opis:
Present work describes the influence of silver nanoparticles precursor form as well as the impact of graphene oxide initial concentration on deposition of the silver nanoparticles onto graphene oxide. Borane dimethylamine complex (DMAB) was used as the reducing agent. It was observed that application of silver ammonia complexes as the silver nanoparticles precursor as well as alkaline solution effect in higher quantity of deposited AgNPs in comparison to deposition process with the use of silver(I) nitrate in acidic solution.
Praca przedstawia wyniki badań nad wpływem wybranych parametrów na proces syntezy i osadzania nanocząstek srebra na powierzchni tlenku grafenu. W badaniach uwzględniono wpływ następujących czynników: stężenie początkowe tlenku grafenu, stężenie początkowe prekursora oraz jego rodzaju. Jako reduktor jonów Ag(I) zastosowano dimetyloamino boran (DMAB). Stwierdzono, iż zastosowanie kompleksu amoniakalnego srebra jako prekursora, jak również zastosowanieśrodowiska alkaicznego skutkuje wyższą efektywnością procesu osadzania AgNPs na powierzchni tlenku grafenu w porównaniu do procesu prowadzonego z zastosowaniem azotanu(V) srebra(I) w środowisku kwaśnym.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 4; 2631-2636
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological, genetic, chemical and ecophysiological characterisation of two Microcystis aeruginosa isolates from the Vistula Lagoon, Southern Baltic
Autorzy:
Mazur-Marzec, H.
Browarczyk-Matusiak, G.
Forycka, K.
Kobos, J.
Plinski, M.
Powiązania:
https://bibliotekanauki.pl/articles/48489.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Microcystis aeruginosa
Cyanoprokaryota
microcystin
mcy gene
morphology
Vistula Lagoon
Baltic Sea
eutrophic water
bloom
16S rRNA sequence
internal transcribed spacer
Opis:
The Vistula Lagoon (southern Baltic Sea) is a shallow and highly eutrophic water body, with frequent blooms of cyanobacteria dominated by Microcystis and Anabaena species. Two Microcystis strains, MK10.10 and MAKR0205, isolated from the lagoon were characterised in this work. The morphology of the isolates differed significantly with respect to cell size and their ability to form aggregates. Based on the 16S rRNA sequence and 16S-23S internal transcribed spacer (ITS) sequence, both isolates were classified as Microcystis aeruginosa. However, only one isolate, MK10.10, possessed the mcy genes responsible for microcystin biosynthesis and only this strain produced microcystins. The effects of environmental factors, such as light, temperature and salinity, on toxin production turned out to be minor. Under the culture conditions used in the experiments, the biomass of the toxic MK10.10 was always lower. Hybrid quadrupole-time-of-flight liquid chromatography/tandem mass spectrometry (QTOF-LC/MS/MS) was used to elucidate the structure of the microcystin (MC) variants produced by MK10.10. Based on molecular ion and fragmentation spectra, the toxins were identified as MC-LR, MC-VR and MC- HIlR. Our study confirmed that some morphological criteria could be useful in preliminarily assessing the potential toxicity of a Microcystis bloom.
Źródło:
Oceanologia; 2010, 52, 1; 127-146
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The State of Water and Wastewater Management in the Municipalities of the Polesie National Park
Autorzy:
Jóźwiakowski, K.
Podbrożna, D.
Kopczacka, K.
Marzec, M.
Kowalczyk-Juśko, A.
Pochwatka, P.
Listosz, A.
Malik, A.
Powiązania:
https://bibliotekanauki.pl/articles/123070.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
municipality
water supply
sewerage
wastewater treatment plant
septic tank
national park
Opis:
The aim of the work is to present the current state of water and wastewater management in the municipalities where the Polesie National Park (PNP) is located. The PNP is situated in Lublin Voivodeship, in the area of six municipalities: Sosnowica, Hańsk, Urszulin, Stary Brus, Wierzbica and Ludwin. The data used in this paper, were obtained on the basis of the surveys conducted in these municipalities in 2016 by the Department of Environmental Engineering and Geodesy of the University of Life Sciences in Lublin. In the analyzed communes, there was a very large disproportion between the usage of sewerage and the water supply network. It has been shown that 79.1% of the inhabitants living in the afore-mentioned communes used the water supply network and only 22.5% of them used sewerage. In the discussed communities there are 9 collective, mechanical and biological wastewater treatment plants with a capacity of over 5 m3•d-1. On the farms located in the scattered areas, which are not connected to the sewerage, wastewater is discharged mainly to the septic tanks. In four out of the six analyzed municipalities, there were 2345 septic tanks registered. Domestic sewage from some farms is purified in household wastewater treatment plants (395 pieces). The plants with the drainage systems are prevalent (84.9%), which may contribute to the groundwater quality degradation. In order to protect the natural environment within the communes that form the PNP, it is necessary to undertake the actions that will contribute to the improvement of the current state of water and wastewater management. While solving the existing problems related to water supply and wastewater treatment, it is strongly required to adhere to the principle of sustainable development and use highly effective systems in order to ensure that the ecological effects are appropriate.
Źródło:
Journal of Ecological Engineering; 2017, 18, 6; 192-199
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of ecological status of surface waters in the Bystrzyca river Lublin
Autorzy:
Grzywna, A.
Jóźwiakowski, K.
Gizińska-Górna, M.
Marzec, M.
Mazur, A.
Obroślak, R.
Powiązania:
https://bibliotekanauki.pl/articles/124509.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water
ecological status
Bystrzyca river
quality indicators
Opis:
The quality of surface water in watercourses in the region of Lublin agglomeration was studied in 2012–2014. Biological and chemical indicators of the study for various sampling sites were detected and the resulting values of the indicators were processed statistically. Rivers characterized by small size and the flow and modification of the riverbed. The resulting low values of macrophyte river index and infusorial index pointed to a poor quality of surface waters. Chemical indicators of the quality of surface waters reached low values, only BOD and phosphates reached high values. The river is located outside the city and it is characterized by moderate potential ecological (III quality class), and the river within Lublin is insufficiently potential ecological (IV quality class). Statistical analysis showed high variability index values between the studied positions.
Źródło:
Journal of Ecological Engineering; 2016, 17, 5; 203-207
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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