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Wyświetlanie 1-15 z 61
Tytuł:
Use of calcite in tricalcium phosphate based chemically bonded biomaterials
Autorzy:
Ślosarczyk, A.
Czechowska, J.
Zima, A.
Powiązania:
https://bibliotekanauki.pl/articles/284790.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
calcium phosphates
bones
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 12
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wastewater Purification from Excess Phosphates Using Bentonite Activated by Microwave Radiation
Autorzy:
Boichuk, Bohdan
Kuzyk, Andrew
Sysa, Leonid
Pastukhov, Paul
Shuplat, Taras
Powiązania:
https://bibliotekanauki.pl/articles/2086429.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
phosphates
adsorption
bentonite
microwaves
Opis:
This article examines the possibilities of improving the ecological condition of small rivers on the example of the upper part of the Prut River in the vicinity of Yaremche (Ivano-Frankivsk region, Ukraine). The previously published data of the article authors and other researchers that the amount of pollutants in river water in this area has increased, in particular, phosphorus compounds, has been confirmed. It was shown that the incompletely purified wastewaters of Yaremche, which contains an excess of phosphate ions, has a significant impact on this fact. On the basis of their own previous research and current work, the authors propose removing these ions using a natural sorbent based on bentonite, activated by microwaves in various ways. Experiments have shown that microwave activation of this sorbent increases the coefficient of phosphate ions extraction from wastewater significantly higher compared to natural bentonite. An approximate technological scheme of wastewater purification from excess phosphates after the main standard purifying cycle was suggested.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 251--259
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short calcium phosphate whiskers for medical applications
Autorzy:
Biernat, M.
Jaegermann, Z.
Tymowicz-Grzyb, P.
Konopka, G.
Ciołek, L.
Pęczkowski, P.
Taźbierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/285379.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
calcium phosphates
whiskers
biomedical applications
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 17
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flotation after a direct contact of flotation reagents with carbonate particles. Part 1, Model investigations
Autorzy:
Ahmed, H. A. M.
Aljuhani, M. S.
Drzymala, J.
Powiązania:
https://bibliotekanauki.pl/articles/109753.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
phosphates
flotation
microemulsion
separation Introduction
Opis:
Carbonate fluorapatite (francolite), calcite and dolomite separately, as well as their model mixtures, were subjected to flotation after conditioning the particles with microemulsion consisting of 20% of Custafloat AR27 (collector, blend of fatty acid soaps and sulfates), 55% fuel oil #5 and 25% water at 70% solids density and subsequent pulp dilution with water to 25% solids. The best separation of carbonate fluorapatite from calcite and dolomite occurred at pH 8.5 and microemulsion dose between 0.9 and 1.5 kg/Mg, 1.5 min conditioning time and 2 minutes of flotation time. The obtained flotation concentrates using 1.5 kg/Mg of collector contained 84% carbonate fluorapatite (34% P2O5) with 84% recovery. The 84/84 separation efficiency in terms of grade-recovery indices points to promising results which can be obtained for real phosphate ores.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 2; 713-723
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-chemical properties of monostarch hydrogen phosphates of various origin
Fizykochemiczne właściwości fosforanów jednoskrobiowych w formie wodorowej różnego pochodzenia
Autorzy:
Fortuna, T.
Powiązania:
https://bibliotekanauki.pl/articles/1401970.pdf
Data publikacji:
1989
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
monostarch hydrogen phosphates
physico-chemical characteristics of monostarch hydrogen phosphates. potato
wheat triticale starch
potato
Opis:
Monostarch phosphates were obtained from potato wheat and triticale starch. They were converted into monostarch hydrogen phosphates whose, physico-chemical properties were studied. The decrease of viscosity and increase of reducibility of the hydrogen forms of starch phosphates are accounted for by autohydrolysis, the course ofwhich depends on the origin of starch.
Uzyskano z krochmalu ziemniaczanego, pszennego oraz skrobi pszenżytniej fosforany jednoskrobiowe o stopniu podstawienia 0,03. Z fosforanów tych otrzymano formę wodorową przez przemywanie próbek roztworem kwasu solnego. W otrzymanych fosforanach, ich formach wodorowych oraz skrobiowych wyjściowych oznaczono: zawartość fosforu całkowitego i fosforu wolnego, zdolność wiązania wody i rozpuszczalność w wodzie w temp. 60°C, zdolność redukcyjną oraz charakterystykę kleikowania w wiskozymetrze rotacyjnym Rheotest 2. Formy wodorowe fosforanów skrobiowych odznaczały się wyższą zdolnością wiązania wody i rozpuszczalnością w wodzie w temp. 60°C niż wyjściowe fosforany skrobiowe. Ponadto ich formy wodorowe wykazywały bardzo niską lepkość we wszystkich punktach pomiaru charakterystyki kleikowania (tab. 3) w stosunku do wyjściowych fosforanów skrobiowych. Zaobserwowano również wzrost redukcyjności (tab. 2) w przypadku form wodorowych fosforanów skrobiowych. Zarówno spadek lepkości kleików, jak również podwyższona redukcyjność form wodorowych fosforanów skrobiowych, wynikają z ich zdolności do autohydrolizy.
Źródło:
Acta Alimentaria Polonica; 1989, 15(39), 3; 227-233
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluorine in ornithogenic soils and minerals on King George Island, West Antarctica
Autorzy:
Tatur, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2053276.pdf
Data publikacji:
1987
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
geochemistry
ornithogenic soil
phosphates
fluorine
Źródło:
Polish Polar Research; 1987, 8, 1; 65-74
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of the aluminium phosphates modified with ammonium, calcium and molybdenum by hydrothermal method
Autorzy:
Łuczka, K.
Grzmil, B.
Kic, B.
Kowalczyk, K.
Powiązania:
https://bibliotekanauki.pl/articles/778651.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
hydrothermal method
anticorrosive pigments
modified aluminum phosphates
Opis:
Synthesis and characterization of the aluminum phosphates modified with ammonium, calcium and molybdenum were conducted. The influence of process parameters (reactive pressure and molar ratios) in the reaction mixture were studied. The contents of the individual components in the products were in the range of: 10.97–17.31 wt% Al, 2.65–13.32 wt% Ca, 0.70–3.11 wt% Mo, 4.36–8.38 wt% NH3, and 35.12–50.54 wt% P2O5. The materials obtained in the experiments were characterized by various physicochemical parameters. The absorption oil number was in the range from 67 to 89 of oil/100 g of product, the surface area was within the range of 4–76 m2/g, whereas the average particle size of products reached 282–370 nm. The Tafel tests revealed comparable anticorrosive properties of aluminum phosphates modified with ammonium, calcium, molybdenum in comparison with commercial phosphate.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 131-139
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Nitrogen and Phosphorus Forms Content in Dojlidy Retention Reservoir
Autorzy:
Oszczapińska, K.
Skoczko, I.
Szczykowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/123705.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water pollution
nitrate nitrogen
ammonia nitrogen
phosphates
Opis:
The Dojlidy Ponds, which include Dojlidy water dam, are located within Bialystok city limits in Podlasie area, Poland. The reservoir with a water surface of 34 ha and average depth of 1.75 m was constructed in 1962 as a result of Biala River damming. The researches were conducted in July, October and December 2014 as well as in March 2015. Each time five test samples were collected from spots located along the reservoir. Water samples were tested for the presence of ammonia nitrogen, nitrite nitrogen, organic nitrogen, phosphates and organic phosphorus. The values of nutrient indicators exhibited high variability during the study period. The highest concentration of nitrite and nitrate nitrogen were observed in July, while the lowest in October – nitrite nitrogen, and in December – nitrate nitrogen. Different situation was observed after the analysis of phosphorus forms – the highest concentrations of organic phosphorus and phosphates were observed in December and the lowest in July. Relatively high concentrations of nitrogen and phosphorus forms identified in water samples were most likely caused by tributaries, due to the pollution from the reservoir catchment. Technical parameters of the object and location of the reservoir have undoubtedly an impact on the tested parameters contents.
Źródło:
Journal of Ecological Engineering; 2017, 18, 1; 147-153
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genesis and stability of accessory phosphates in silicic magmatic rocks: a Western Carpathian case study
Autorzy:
Broska, I.
Perik, I.
Powiązania:
https://bibliotekanauki.pl/articles/2086551.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
phosphates
monazite
apatite
xenotime
granite
Western Carpathians
Opis:
The formation of accessory phosphates in granites reflects many chemical and physical factors, including magma composition, oxidation state, concentrations of volatiles and degree of differentiation. The geotectonic setting of granites can be judged from the distribution and character of their phosphates. Robust apatite crystallization is typical of the early magmatic crystallization of I-type granitoids, and of late magmatic stages when increased Ca activity may occur due to the release of anorthite from plagioclase. Although S-type granites also accumulate apatite in the early stages, increasing phosphorus in late differentiates is common due to their high ASI. The apatite from the S-types is enriched in Mn compared to that in I-type granites. A-type granites characteristically contain minor amounts of apatite due to low P concentrations in their magmas. Monazite is typical of S-type granites but it can also become stable in late I-type differentiates. Huttonite contents in monazite correlate roughly positively with temperature. The cheralite molecule seems to be highest in monazite from the most evolved granites enriched in B and F. Magmatic xenotime is common mainly in the S-type granites, but crystallization of secondary xenotime is not uncommon. The formation of the berlinite molecule in feldspars in peraluminous melts may suppress phosphate precipitation and lead to distributional inhomogeneities. Phosphate mobility commonly leads to the formation of phosphate veinlets in and outside granite bodies. The stability of phosphates in the superimposed, metamorphic processes is restricted. Both monazite-(Ce) and xenotime-(Y) are unstable during fluid-activated overprinting. REE accessories, especially monazite and allanite, show complex replacement patterns culminating in late allanite and epidote formation.
Źródło:
Mineralogia; 2008, 39, 1/2; 53--65
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genesis and stability of accessory phosphates in silicic magmatic rocks: a Western Carpathian case study
Autorzy:
Broska, Igor
Perik, Igor
Powiązania:
https://bibliotekanauki.pl/articles/2086521.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
phosphates
monazite
apatite
xenotime
granite
Western Carpathians
Opis:
The formation of accessory phosphates in granites reflects many chemical and physical factors, including magma composition, oxidation state, concentrations of volatiles and degree of differentiation. The geotectonic setting of granites can be judged from the distribution and character of their phosphates. Robust apatite crystallization is typical of the early magmatic crystallization of I-type granitoids, and of late magmatic stages when increased Ca activity may occur due to the release of anorthite from plagioclase. Although S-type granites also accumulate apatite in the early stages, increasing phosphorus in late differentiates is common due to their high ASI. The apatite from the S-types is enriched in Mn compared to that in I-type granites. A-type granites characteristically contain minor amounts of apatite due to low P concentrations in their magmas. Monazite is typical of S-type granites but it can also become stable in late I-type differentiates. Huttonite contents in monazite correlate roughly positively with temperature. The cheralite molecule seems to be highest in monazite from the most evolved granites enriched in B and F. Magmatic xenotime is common mainly in the S-type granites, but crystallization of secondary xenotime is not uncommon. The formation of the berlinite molecule in feldspars in peraluminous melts may suppress phosphate precipitation and lead to distributional inhomogeneities. Phosphate mobility commonly leads to the formation of phosphate veinlets in and outside granite bodies. The stability of phosphates in the superimposed, metamorphic processes is restricted. Both monazite-(Ce) and xenotime-(Y) are unstable during fluid-activated overprinting. REE accessories, especially monazite and allanite, show complex replacement patterns culminating in late allanite and epidote formation.
Źródło:
Mineralogia; 2008, 39, 1/2; 53--65
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on sintering process of synthetic hydroxyapatite
Autorzy:
Malina, Dagmara
Biernat, Kamila
Sobczak-Kupiec, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1039506.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
calcium phosphates
hydroxyapatite
sintering process
wet synthesis
Opis:
In this study the effect of sintering process in different temperatures on microstructure and morphological properties of sintered hydroxyapatite (HAp) was investigated. HAp powder was prepared by wet precipitation method from following reagents: Ca(OH)2 + H3PO4 in an alkaline conditions. Thermal analysis (TA), X-Ray diffraction method (XRD), FT-IR spectrometry (FT-IR) and scanning electron microscopy (SEM) were used to elaborate the phase composition and properties of sintered HAp samples and raw HAp powder as well. The total and apparent density and total porosity of sintered compacts, shrinkage and weight loss during the sintering were also measured. The results show that there is a difference in sintering behavior of synthetic hydroxyapatites depending on sintering temperature. The main differences refer to the loss of mass, shrinkage, changes in porosity and density of the investigated materials.
Źródło:
Acta Biochimica Polonica; 2013, 60, 4; 851-855
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surfactant enhanced ultrafiltration for the removal of inorganic phosphorous compounds from aqueous solutions
Autorzy:
Górna, J.
Majewska-Nowak, K.
Powiązania:
https://bibliotekanauki.pl/articles/207149.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
micellar ultrafiltration
polyethersulfone membrane
phosphates
phosphates removal
octan oktadecylamines
ultrafiltracja micelarna
membrany polieterosulfonowe
fosforany
usuwanie fosforanów
oktan oktadecyloaminy
Opis:
he usability of the micellar enhanced ultrafiltration (MEUF) for removal of phosphates from aqueous solutions has been evaluated. The process was performed with the use of polyethersulfone membranes under various transmembrane pressures (0.1, 0.15, and 0.2 MPa). Phosphorous solutions containing 15 mg of PO3-4/dm3 and two cationic surfactants: octadecylamine acetate (ODA) and hexadecylpyridium chloride (CPC) were used in the tests. The concentration of ODA and CPC amounted to 2 and 3 CMC (Critical Micelle Concentration) as well as 2, 3 and 6 CMC, respectively. The results of the study showed that the surfactant type and its concentration influenced the process efficiency. The phosphate removal with the use of ODA was approximately 95%, whereas application of CPC gave unsatisfactory results.
Źródło:
Environment Protection Engineering; 2013, 39, 3; 197-206
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wydolność beztlenowa a wybrane zdolności piłkarzy nożnych
Relationships between anaerobic endurance and selected football skills
Autorzy:
Polczyk, Michał
Powiązania:
https://bibliotekanauki.pl/articles/465038.pdf
Data publikacji:
2013
Wydawca:
Akademia Wychowania Fizycznego we Wrocławiu
Tematy:
anaerobic endurance
phosphates
footbal;
wytrzymałość beztlenowa
piłka nożna
Opis:
Background. The purpose of this study was to establish a relationship between anaerobic performance and some selected football skills. Material and methods. Fifteen healthy football players (22.3 ± 4.2 years; height 176.5 ± 5.76 cm; body mass 76.1 ± 5.37 kg) participated in the experiment. Anaerobic work and maximal anaerobic power were assessed in repeated trials on the cycle ergometer. Measured parameters were: maximum power (Pmax), time to reach Pmax [s], hold time Pmax [s], a number of accomplished repetitions (without decline in Pmax) and total work [kJ]. Football skills (technical, tactical, activity during the match and decision making) underwent the coach’s subjective assessment. Results and conclusion. The results showed a significant relationship between hold time Pmax and total work for the chosen football skills. These results provide a series of significant evidence that phosphate abilities affect the competitive level of football players.
Źródło:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu; 2013, 42; 12-19
0239-4375
Pojawia się w:
Rozprawy Naukowe Akademii Wychowania Fizycznego we Wrocławiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technologiczna przydatność enzymu transglutaminazy i soli fosforanowej w produkcji kutrowanych kiełbas parzonych
Technological usefulness of transglutaminase and phosphate salt in production of comminuted cooked sausages
Autorzy:
Pyrcz, J.
Kowalski, R.
Kostecki, A.
Danyluk, B.
Powiązania:
https://bibliotekanauki.pl/articles/270653.pdf
Data publikacji:
2014
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
wędliny parzone
transglutaminaza
fosforany
cooked sausages
transglutaminase
phosphates
Opis:
Udział w zestawie surowcowym enzymu transglutaminazy oraz soli fosforanowej różnicuje istotnie ocenę pożądalności sensorycznej, jak i fizyczne wyróżniki jakości kutrowanych kiełbas parzonych. Preparaty te nie mają wpływu na zmianę oceny sensorycznej, barwy na przekroju, smaku i zapachu. Istotnie natomiast oddziaływają na poprawę konsystencji, jak i na ograniczenia ubytku masy gotowych wędlin. Wykazano, że enzym transglutaminazy może być alternatywą dla stosowania fosforanów w technologii produkcji kutrowanych kiełbas parzonych.
Use of transglutaminase enzyme and phosphate salts in raw materials set influences significantly sensory desirability and physical quality attributes of comminuted cooked sausages. These preparations don't affect changes of sensorial evaluated cross colour, taste and aroma of samples. On the other hand, essential consistency improvement and lower mass reduction of finał product is observed. Transglutaminase enzyme application has been shown as alternative for phosphates in manufacturing comminuted cooked sausages.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2014, 19, 4; 315-320
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 61

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