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Wyświetlanie 1-9 z 9
Tytuł:
Chromian spinels from the Magura Unit (Western Carpathians, Eastern Slovakia) : their petrogenetic and palaeogeographic implications
Autorzy:
Bónová, K.
Špisiak, J.
Bóna, J.
Kováčik, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060358.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Carpathians
Magura Basin
provenance
detrital chromian spinel
geochemistry
Opis:
Detrital chromian spinels in sedimentary rocks provide much information concerning the tectonics of their parental ultrabasic rocks. Chromian spinels occurring in the Eocene to Oligocene depos its from the Magura Nappe were exam i ned to provide some constraints on the history of the Magura Basin. The Magura Nappe is a part of the Flysch Belt belonging to the External Western Carpathians. The Magura Nappe is separated by a narrow zone associated with the Pieniny Klippen Belt and is divided into three principal tectono-lithofacies units (from the S to N): the Krynica, Bystrica and Rača units. Cr-spinel is a common accessory mineral (2.3-5.9 vol% of heavy mineral spectra) in the siliciclastic rocks of the Rača and Krynica units. In terms of texture and chemical composition, two types of Cr-spinels were recognized: unaltered and altered. Unaltered spinels were found to contain silicate inclusions such as chromio-pargasite, enstatite, diopside, pargasite, plagioclase and olivine (forsterite). The chromian spinels show wide variations in compositional parameters such as Cr# (0.3-0.7), Mg# (0.3-0.7), TiO2 (<0.03-1.9 wt.%) and Fe2+/Fe3+ (2.5-13) whereas the differences between the Rača and Krynica units are in- significant. These parameters suggest a peridotitic and volcanic origin of the spinels, respectively. The ophiolite source consisting of harzburgitic mantle peridotites was developed mainly in a supra-subduction zone setting; volcanic spinels indicate an origin in mid-ocean ridge basalts, back-arc basin basalts and sporadically in ocean-island basalts. Concerning their geochem i cal features, we propose that during the Eocene to Early Oligocene, the ophiolitic detritus in the eastern part of the Magura Basin deposits may have been derived from a source area located in the Fore-Marmarosh Suture Zone (Eastern Carpathians) that is considered an equivalent of the Black Flysch and Ceahlau units. Some Cr-spinels found in the Eocene sedimentary successions may have resedimented from older Late Cretaceous-Paleocene formations of the Magura Unit, which are considered as reworked sedimentary material from the Pieniny Klippen Belt.
Źródło:
Geological Quarterly; 2017, 61, 1; 3--18
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals from sedimentary rocks of the Malcov Formation and their palaeogeographic implications for evolution of the Magura Basin (Western Carpathians, Slovakia) during the Late Eocene–Late Oligocene
Autorzy:
Bónová, K.
Bóna, J.
Kováčik, M.
Laurinc, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059937.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Carpathians
Magura Nappe
Malcov Formation
provenance
heavy minerals
mineral composition
Opis:
Detrital heavy minerals separated from the Malcov Fm. deposits (Magura Nappe) indicate their source rocks and areas. The heavy mineral assemblages predominantly consist of garnet, zircon, tourmaline, rutile and Cr-spinel. EPMA analyses reveal a few groups of garnets: zoned and unzoned Grs almandines, Prp-Sps almandines, unzoned Prp almandines, almandines, Sps almandines and rare zoned spessartine grains (~85 mol% Sps). The garnet composition indicates that gneisses, mica schists, amphibolites and granites were their main source rocks, but low-grade metapelites with Mn mineralisation probably contributed as well. The detrital dravitic tourmalines were mostly derived from paragneisses and mica schists. Cr-spinel indicates a volcanic source. Based on heavy mineral assemblages, coupled with palaeoflow analysis, we conclude that the Marmarosh Massif and Fore-Marmarosh Suture are the most probable source areas. Aditionally, the Malcov sedimentary basin was supplied by material from the crystalline complexes of the Tisza Mega-Unit and Pieniny Klippen Belt (PKB). The bulk of the clastic deposits comprise classical turbidites. These lithofacies were deposited from either turbidity currents or from concentrated density flows. The palaeoflow record is varied and highlights the contribution of sedimentary material from several directions and/or diversion of gravity currents from the main flow direction (SE–NW). The marginal parts of the Malcov sub-basins were formed of deformed and uplifted older formations of surrounding units of the Magura Nappe and PKB (submerged ridges). Older (Late Cretaceous to Eocene) flysch sediments may have been redeposited from these ridges to neighbouring sub-basins in a transverse direction (NE–SW).
Źródło:
Geological Quarterly; 2016, 60, 3; 675--694
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the nematicidal potential of vermicompost, vermicompost tea, and urea application on the potato-cyst nematodes Globodera rostochiensis and Globodera pallida
Autorzy:
Renco, M.
Kovacik, P.
Powiązania:
https://bibliotekanauki.pl/articles/65937.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The addition of organic material to the soil can be an effective alternative to the environmentally unsafe chemical treatments that are used to control plant parasitic nematodes. We evaluated the effects of vermicompost alone, and aqueous solutions of vermicompost (vermicompost tea) either alone or mixed with urea, on the development and survival of two potato-cyst nematodes: Globodera rostochiensis (pathotype Ro1) and G. pallida (pathotype Pa2) and on the growth parameters of the host potato plants. Soil amendments with these materials significantly decreased the number of cysts · 400 g–1 of both species in the soil, the number of eggs and juveniles · cyst–1 of both species, and the number of eggs and juveniles · g–1 of both species in the soil, relative to the untreated controls. The suppressive effect was significantly higher at the highest dose than the lowest treatment dose, for all tested materials. Globodera rostochiensis was more sensitive to all the tested materials than G. pallida. The aqueous solutions of vermicompost alone or in combination with urea were more effective than the solid vermicompost used alone, for controlling both species. Vermicompost and the vermicompost teas had positive effects on plant fresh stem weight and stem height. The application of vermicompost tea instead of the solid vermicompost, substantially decreased the amount of material needed. These amendments are thus promising for the control of potato-cyst nematodes in sustainable agricultural systems.
Źródło:
Journal of Plant Protection Research; 2015, 55, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of fresh sawdust and dry pig manure produced on sawdust bedding application on the nutrients mobility in soil and sugar beet yield
Autorzy:
Kováčik, P
Kmeťová, M
Renčo, M
Powiązania:
https://bibliotekanauki.pl/articles/125101.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sawdust
pig manure
immobilization
sugar beet
Opis:
The objective of the pot trial carried out at the area of the Slovak University of Agriculture in Nitra was to determine the impact of dry pig manure produced on the sawdust bedding and sawdust litter on the level of nutrients’ mobility in the soil and sugar beet yield. The achieved results showed that one month after the sawdust and manure application to the soil, the contents of mobile nutrients (Nan, P, K, Ca, Mg) in soil were lower than in the control unfertilized treatment. The sawdust litter immobilized nutrients more considerably than manure. Four months after the manure application into soil, its immobilization effect was not evident. On the contrary, the manure increased the mobile nutrients content in soil. In the second year of experiment the immobilization effect of sawdust litter was proved even four months after its application into soil. The application of manure increased considerably the beet root yield. The maximum root yield was determined in the treatment where the highest dose of manure was applied. The minimum root yield was detected in the treatment where the highest dose of sawdust litter was applied.
Źródło:
Journal of Ecological Engineering; 2013, 14, 3; 69-76
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of foliar application of the biostimulator Mg-Titanit on the formation of winter oilseed rape phytomass and its titanium content
Autorzy:
Kováčik, P.
Šimanský, V.
Wierzbowska, J.
Renčo, M.
Powiązania:
https://bibliotekanauki.pl/articles/962759.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
The objective of the following three-year small-plot experiments was to determine the impact of a dose and application date of the biostimulator Mg-Tytanit (MgTi) on the formation of winter oilseed rape phytomass and its titanium cont ent. In the trial the biostimulant Mg-Tytanit containing 8.5 g of titanium in 1 liter was used. The experiment consisted of 5 treatments: 0 – control treatment without MgTi; 2xTi0.2 – two applications of MgTi in the dose of 0.2 dm3 ha-1; 3xTi0.2 – three applications of MgTi in the dose of 0.2 dm3 ha-1; 2xTi0.4 – two applications of MgTi in the dose of 0.4 dm3 ha-1; 3xTi0.4 – three applications of MgTi in the dose of 0.4 dm3 ha-1. The BS was applied in spring during two or three different growth stages: BBCH 50, BBCH 59, BBCH 66. The first plant sampling was carried out shortly before the first application of BS (BBCH 50). The second, third and fourth sampling were taken 2 – 3 weeks after the application of Mg-Tytanit (BBCH 59, BBCH 66, BBCH 71). The results showed that the biostimulator MgTi, regardless of its dose and application date, resulted in a higher weight of the aerial and underground phytomass. All the MgTi applications had impact on the winter oilseed rape yield increase. The seed yield was increased by 0.3 to 0.63 t ha-1. Higher yields were achieved in the treatments where MgTi was applied three times in comparison with the treatments, where it was used twice. The oil content in rape seeds was increased significantly only if MgTi was used in the total doses 0.8 and 1.2 dm3 ha-1 in the single application dose 0.4 dm3 ha-1. The oil content value was increased by 0.94 % and by 0.82 %. The oil production per hectare was increased after each use of MgTi, i.e. regardeless of the dose and date of its application. The highest Ti content in the aerial phytomass was 68.5 mg kg-1 and in the underground phytomass it was 247.1 mg kg-1.
Źródło:
Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ash-fly ash mixture application on soil fertility*
Wpływ stosowania popiołów, popiołów lotnych i ich mieszanek na żyzność gleby
Autorzy:
Kovacik, P.
Macak, M.
Duscay, L.
Halcinova, M.
Jancich, M.
Powiązania:
https://bibliotekanauki.pl/articles/14694.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Nowadays, it is illegal to apply ashes, fly ashes and their mixtures on arable soil in Slovakia although it is allowed in many countries. The reasons why the Slovak law prohibits using these substances in agriculture are not explicitly stated but most probably it is so because of the variable and often high content of heavy metals as well as the residual radioactivity in soil treated with such mixtures. However, ashes and fly ashes are significantly different in parameters, therefore they should be classified individually. It is irrational to ignore some positive effects of ashes and fly ashes on plants if they do not pose a threat of increased input of heavy metals and residual radioactivity into soil and, subsequently, in crops. The aim of this experiment has been to find out the effect of ash-fly ash mixture (AFAM) on some soil yielding parameters and to clarify opinions on using ashes and fly ashes in agriculture. A pot experiment was carried out in a vegetation cage located in the premises of the SAU in Nitra. Pots of the capacity of 30 kilos were filled with 24 kg of anthropogenic soil prepared by mixing two portions of Haplic Luvisol with one portion of siliceous sand. The ash-fly ash and/or NPK fertilizers were applied into the whole soil profile. The experimental design comprised 6 treatments (0, AFAM1, NPK, NPK+ AFAM1, NPK+ AFAM2, NPK+ +AFAM3), each in four replications, as follows: 1 – control treatment, 2 – AFAM in a dose of 3 t ha–1, 3 – NPK mineral fertilizer, 4 – NPK mineral fertilizer + AFAM in a dose of 3 t ha–1, 5 – NPK mineral fertilizer + AFAM in a dose of 30 t ha–1, 6 – NPK mineral fertilizer + AFAM in a dose of 150 t ha–1. The soil samples were analysed in the whole soil profile after harvest of spring barley. The ash-fly ash mixture in the basic dose of 3 t ha–1 positively influenced several soil parameters. Statistically significant increase of both pHKCl and pHH20 as well as the content of available calcium were noted. The total carbon content (Cox), carbon of humic substances (CHS), carbon of humic acids (CHA), carbon of fulvic acids (CFA) and available K also increased but not significantly. Sorption capacity (CEC)did not change. The sum of exchangeable base cations (EBC), base saturation (BS), conductivity (EC) and content of Nin and Mg were not significantly influenced. The AFAM with NPK combination significantly decreased the bulk density of soil (BD). Addition of AFAM to mineral NPK fertilizers at the rates of 3, 30 and 150 t ha–1, respectively, influenced positively the content of Cox, CHS, CHA, Mg and the values of CEC, EBC, BS, BD, pHH2O and pHKCl. This addition had a negative effect ob just two parameters: EC and content of mineral nitrogen. Application of ash-fly ash mixture alone or with NPK fertilizers improved soil parameters, which enhanced the soil productivity and its resistance against depressed fertility caused by unidirectional industrial nutrition.
Aplikacja popiołów, popiołów lotnych i ich mieszanek w glebach Słowacji nie jest dozwolona przez prawo, mimo że niektóre państwa pozwalają na takie wykorzystanie. Można przypuszczać, ze jest to spowodowane głównie niestabilną i często wysoką zawartością metali ciężkich oraz związków promieniotwórczych w glebie. Poszczególne popioły i popioły lotne znacznie różnią się powyższymi parametrami, z tego powodu konieczna jest indywidualna ocena wykorzystania popiołów w Słowacji. Korzystnego wpływu popiołów i popiołów lotnych na rośliny nie można pominąć w przypadku surowców nie stwarzających zagrożenia związanego ze zwiększoną ilością metali ciężkich i związków radioaktywnych. Celem eksperymentu było określenie wpływu mieszanki popiołu z popiołem lotnym (AFAM) na niektóre parametry glebowe oraz sprecyzowanie poglądów na wykorzystanie popiołów i popiołów lotnych w rolnictwie. Eksperyment przeprowadzono w wegetacyjnej klatce znajdującej się na terenie Słowackiego Uniwersytetu Rolniczego w Nitrze, w 30 kg pojemnikach z 24 kg antropogenicznej gleby, która powstała po zmieszaniu 2 części brunatno-modalnej gleby i 1 części piasku krzemionkowego. Do całego profilu glebowego powyższych pojemników aplikowano mieszankę popiołów i popiołów lotnych lub nawozów NPK w 4 powtórzeniach. Eksperyment miał 6 wariantów (0, AFAM1, NPK, NPK+ AFAM1, NPK+ AFAM2, NPK+ AFAM3): 1 – wariant kontrolny, 2 – mieszanka popiołu i popiołu lotnego w ilości 3 t ha–1, 3 – nawozy sztuczne NPK, 4 – nawozy NPK + AFAM w ilości 3 t ha–1, 5 – nawozy NPK + AFAM w ilości 30 t ha–1, 6 – nawozy NPK + AFAM w ilości 150 t ha–1. Mieszanka popiołu i popiołu lotnego (AFAM) stosowana w ilości 3 t ha–1 miała pozytywny wpływ na kilka parametrów glebowych. Istotnie statystycznie zwiększyła wartość pHKCl, pHH2O i dostępnych zasobów Ca. W przypadku zawartości węgla całkowitego (Cox), węgla substancji humusowych (CHS), węgla kwasów huminowych (CHA), kwasów fulvia (CFA) i dostępnego K reakcja na wzrost była niejednoznaczna. Gęstość objętościowa gleby (BD) się zmniejszyła. Absorpcja (CEC) nie uległa zmianie. Statystycznie nieistotny, ale negatywny wpływ miała na ilość kationów podstawowych (EBC), stopień nasycenia kationami bazowymi (BS), przewodność (EC), zawartość Nan i Mg. Dodanie AFAM do nawozów NPK w dawkach 3, 30 i 150 t ha–1 miało pozytywny wpływ na ilości Cox, CHS, CHA i Mg, na wartości CEC, EBC, BS, pHKCl i pHH2O, BD gleby. Negatywnie wpłynęło tylko na EC i zawartość Nin. Wykorzystanie mieszanki popiołu i popiołów lotnych oraz mieszanki w połączeniu z nawozami NPK poprawiło głównie te parametry gleby, które zwiększają jej wydajność, odporność na spadek plonów spowodowany jednostronnym sztucznym nawożeniem roślin.
Źródło:
Journal of Elementology; 2011, 16, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Lead, Silver and Molybdenum on Steroidogenesis in Porcine Ovarian Granulosa Cells in Vitro
Wpływ ołowiu, srebra i molibdenu na steroidogenezę in vitro w komórkach ziarnistych jajników świni
Autorzy:
Kolesárová, A.
Capcarova, M.
Sirotkin, A.
Kovacik, J.
Powiązania:
https://bibliotekanauki.pl/articles/389305.pdf
Data publikacji:
2010
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
ołów
srebro
molibden
progesteron
steroidogeneza
komórki ziarniste
lead
silver
molybdenum
progesterone
steroidogenesis
granulosa cells
Opis:
The present study was carried out to investigate possible effects of lead (Pb), silver (Ag) and molybdenum (Mo) administrations on porcine ovarian granulosa cells in relation to progesterone (P4) release. Ovarian granulosa cells were incubated with/without lead acetate, silver nitrate and ammonium molybdate for 18 hours: 1.0 mg/cm3; 0.5 mg/cm3; 0.33 mg/cm3; 0.17 mg/cm3; 0.09 mg/cm3 and the control group without metal addition. The release of progesterone by granulosa cells was assessed by R1A. The release of steroid hormone P4 was significantly (p < 0.05) inhibited after Pb administration at the dose l .0 mg/cm3. Secretion of P4 by granulosa cells was decreased by Ag addition at the doses 0.5 mg/cm3; 0.33 mg/cm3; 0.17 mg/cm3 and 0.09 mg/cm3. Significant (p < 0.05) increase of P4 release after Mo addition was found. Data obtained from these in vitro studies indicate new knowledge that release of steroid hormone progesterone by porcine granulosa cells is associated with doses and variety of Chemical treatments (Pb, Ag, Mo). Obtained data indicate the interference of these endocrine disruptors in the pathways of steroidogenesis of porcine oyarian granulosa cells.
Zbadano wpływ ołowiu (Pb), srebra (Ag) i molibdenu na wydzielanie progesteronu (P4) przez komórki ziarniste jajników świni. Komórki ziarniste inkubowano w obecności octanu ołowiu, azotanu srebra i molibdenianu amonu przez 18 godzin: 1.0 mg/cm3; 0.5 mg/cm3; 0.33 mg/cm3; 0.17 mg/cm3; 0.09 mg/cm3. Założono również grupę kontrolną komórek ziarnistych, które nie były eksponowane na jony metali. Wydzielanie progesteronu przez komórki ziarniste zostało zbadane metodą RIA. Wydzielanie sterydu P4 przez komórki ziarniste zostało zahamowane w sposób statystycznie istotny (p < 0.05) przez ołów podany w dawce l mg/cm3. Wydzielenie P4 zmniejszyło się w obecności Ag w stężeniach 0.5 mg/cm3; 0.33 mg/cm3; 0.17 mg/cm3 i 0.09 mg/cm3. Stwierdzono statystycznie istotny wzrost wydzielania P4 po podaniu Mo (p < 0.05). Wyniki uzyskane w przedstawionym eksperymencie prowadzonym in vitro wykazują, że wydzielanie progesteronu przez komórki ziarniste jajników świni może być modyfikowane przez różne czynniki chemiczne (Pb, Ag, Mo) stosowane w zróżnicowanych dawkach. Odnotowane zjawisko jest prawdopodobnie związane z zaburzeniem niektórych szlaków steroidogenezy zachodzącej w komórkach ziarnistych jajników świni.
Źródło:
Ecological Chemistry and Engineering. A; 2010, 17, 1; 107-118
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Vermicompost Extract Application Into Soil and on Plant Leaves on Maize Phytomass Formation
Autorzy:
Kováčik, P.
Renčo, M.
Šimanský, V.
Hanáčková, E.
Wiśniowska-Kielian, B.
Powiązania:
https://bibliotekanauki.pl/articles/124045.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
vermicompost
vermi extract
foliar application
maize
Opis:
Nowadays in scientific literature many opposing data are presented of the impacts of vermicompost extract on the quantity and quality of crop production. Therefore, the principal objective of two independent experiments was to study the effects of vermi extracts, which were applied before maize sowing into soil and during the growing season on the maize leaves, on its phytomass formation. The first, field experiment consisted of 9 variants. Variant 1 was the control one without the extract application. We studied the effect of the rising doses (90, 130, 170, 210 dm3.·ha-1) of vermi-extract applied into soil before the maize sowing in the variants E1, E2, E3, E4. In the variants E1+E, E2+E, 3+E, E4+E along with the rising doses of vermi-extract was also applied the uniform dose of vermi-extract (40 dm3·ha-1) at the growth stage BBCH 15. The second, pot experiment was pursued in the vegetation cage and comprised 3 variants: variant 1 was the control, in the variants 2 and 3 the foliar application of vermi-extract was used. The vermi-extract was applied once (growth stage BBCH 12) in the variant 2 and in the variant 3 it was used twice (at growth stages BBCH 12 and BBCH 16). The achieved results show that the vermi-extract applied in the presowing period in-creased the yield of maize grains if the application doses were 130–170 dm3·ha-1. The positive or negative impact of the foliar application by vermi-extract on the yield of maize grains depended on the period of application and the grown cultivar. In order to increase the starch content in grains it was more suitable to carry out the presowing ver-miextract application than during the growing season. The presowing application and the foliar application of vermi-extract tended to decrease the nitrogen content in grain. The foliar application of vermi-extract had the positive impact on the plant height and stalk thickness of the maize plants only in short term. The information obtained from the first half of maize growing season related to the plant height and stalk thickness was not the appropriate indicator for the assessment of maize grain yields.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 143-153
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acrylic Acid Plasma Treatment of Polypropylene Nonwoven Fabric
Włókniny polipropylenowe poddane obróbce plazmowej z zastosowaniem kwasu akrylowego
Autorzy:
Buček, A.
Popelka, A.
Zahoranová, A.
Kováčik, D.
Novák, I.
Černák, M.
Powiązania:
https://bibliotekanauki.pl/articles/233415.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
plasma treatment
hydrogel
diaphragm discharge
plasma grafting
biocompatibility
peel strength
obróbka plazmowa
hydrożel
biozgodność
kwas akrylowy
włókniny polipropylenowe
Opis:
Nowadays hydrogel materials are being used in medical practice for wound dressing purposes. Hydrogel/textile composites can be formed to increase the mechanical strength and handling capability of hydrogel materials. Nonwoven textiles are optional for such applications, however, it is often necessary to improve their surface properties. Here plasma activation/grafting of polypropylene (PP) nonwoven fabric with an acrylate layer to improve its adhesive properties is reported. A diaphragm discharge was used for the plasma treatment of the PP fabric. The discharge was burnt in a solution of acrylic acid (AAc), which resulted in a single step process of plasma activation and plasma grafting of the fabric. Results of wettability testing and ATR-FTIR measurements showed the existence of a thin poly(acrylic acid) (PAAc) layer grafted on the fabric surface. Peel strength measurements showed a 4.7 fold increase in the peel strength when compared with untreated PP fabric.
Współcześnie materiały hydrożelowe używane są w wyrobach medycznych jako opatrunki na rany. Hydrożelowe kompozyty tekstylne formuje się dla zwiększenia mechanicznej wytrzymałości poręczności w stosowaniu. Włókniny są powszechnie stosowane do wyrobów medycznych, jednak jest konieczne polepszenie ich właściwości powierzchniowych. W badaniach zastosowano aktywację plazmową w celu pokrycia włóknin polipropylenowych warstwą akrylową dla polepszenia właściwości adhezyjnych. Wyładowania odbywały się w roztworze kwasu akrylowego co pozwoliło na przeprowadzenie jednostopniowego procesu aktywacji plazmowej. Wyniki pomiarów zwilżalności oraz badania ATR-FTIR wykazały istnienie cienkiej warstwy kwasu poliakrylowego na powierzchni włókniny. Stwierdzono 4.7 razy większą wytrzymałość na odrywanie w stosunku do włóknin niemodyfikowanych.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 6 (120); 161-164
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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