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Wyszukujesz frazę "Malik, M." wg kryterium: Autor


Tytuł:
AC Conductivity of Cobalt Phthalocyanine
Autorzy:
Abdel-Malik, T. G.
Kassem, M. E.
Aly, N. S.
Khalil, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/1920784.pdf
Data publikacji:
1992-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.40.+i
Opis:
The dielectric properties of cobalt phthalocyanine are investigated in the frequency range 50-5×10$\text{}^{5}$ Hz and within the temperature range 293-363 K. The frequency dependence of the AC impedance could be expressed by the complex plane of the complex impedance. Analysis of the AC conductivity reveals semiconducting features based predominantly on the hopping mechanism. The relaxation time, derived from the experimental results, shows a thermally activated process.
Źródło:
Acta Physica Polonica A; 1992, 81, 6; 675-680
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Behaviour of Potassium Acetylacetonate
Autorzy:
Abdel-Malik, T. G.
Kassem, M. E.
Abdel-Latif, R. M.
Khalil, S. M.
Powiązania:
https://bibliotekanauki.pl/articles/1920790.pdf
Data publikacji:
1992-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.40.+i
Opis:
The dielectric constant and the dielectric loss of potassium acetylacetonate, K(acac), are measured as a function of both temperature and frequency. A peak value is obtained at the a critical temperature T$\text{}_{c}$ = 313 K. X-ray analysis revealed that at T$\text{}_{c}$, K(acac) undergoes phase transition from orthorhombic to triclinic structure. The Cole-Cole diagrams have been used to determine the molecular relaxation time τ. The temperature dependence of τ is expressed by thermally activated process. The impedance spectra in the frequency range from 50 Hz to 500 kHz plotted in the complex plane show semicircles. The conduction mechanism, below T$\text{}_{c}$, is predominantly operating at the surface. Above T$\text{}_{c}$, the conduction is proceeding in the bulk material with contribution from the surface.
Źródło:
Acta Physica Polonica A; 1992, 81, 6; 681-686
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of hydrogel- and xerogel-based sorbent from Empty Fruit Bunch (EFB)
Autorzy:
Alias, A.B.
Qarizada, D.
Malik, N.S.A.
Noraini, N.M.R.
Rashid, Z.A.
Powiązania:
https://bibliotekanauki.pl/articles/24200604.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
biomass
hydrogel
empty fruit bunch
xerogel
sorbent
biomasa
hydrożel
pusta kiść owoców
kserożel
Opis:
Purpose: This paper focuses on the synthesis and comparison of hydrogel- and xerogel-based sorbents from EFB. Design/methodology/approach: Hydrogels were synthesised by polymerisation of EFB biochar with acrylamide (AAm) as a monomer, N, N'-Methylenebisacrylamide (MBA) as cross-linker and ammonium persulfate (APS) as initiator, as well as by internal gelation method of sodium alginate, empty fruit bunch (EFB), calcium carbonate (CaCO3), and glucono delta-lactone (GDL). From the alginate hydrogels obtained, xerogels were synthesised via the oven-drying method. Then, EFB-based hydrogel and xerogel sorbents were analysed and compared based on characterisation analysis by using scanning electron microscopy (SEM), Brunauer− Emmett−Teller (BET), Fourier-Transform Infrared Spectroscopy (FTIR), and thermogravimetric analysis (TGA). Findings: The xerogel-based EFB is a better adsorbent than the hydrogel-based EFB because it has a larger pore volume (0.001449 cm3/g), larger pore size (63.7987 nm), higher moisture content (7.97%), lower ash content (12.55%), and is more thermally stable. Research limitations/implications: The research is to compare two new adsorbents, namely Hydrogel and Xerogel, from EFB in terms of their characteristics. Practical implications: Both adsorbents show a highly toxic material uptake, especially EFB xerogel. This adsorbent is comparable with the other commercialised adsorbent. Thus, this product can be a highly potential adsorbent for gas and wastewater adsorption. Originality/value: The authenticity results of this article were found to be 15% similar. The novelty of this paper is to compare the two adsorbents, namely hydrogel and xerogel, that originated from EFB.
Źródło:
Archives of Materials Science and Engineering; 2022, 118, 2; 49--60
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Validated Reverse Phase HPLC Technique for the Determination of TATB Assay
Autorzy:
Bhattacharyya, S. C.
Patil, R. S.
Santosh, M. S. S. N. M.
Bhattacharya, B.
Malik, R. K.
Mehra, A.
Powiązania:
https://bibliotekanauki.pl/articles/951496.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
TATB
HPLC
HPTLC
explosive
LOQ
LOD
Opis:
The main hurdle for the estimation of the purity of 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) is its insolubility in most of the known organic solvents. In the conventional method, TATB is digested with steam in a modified Kjeldahl digester and the ammonia evolved is estimated quantitatively. To do away with this cumbersome method, a simple, rapid HPLC technique using a reverse phase C-18 column has been established for quantitative determination of the purity of TATB. A sharp and symmetrical peak with a retention time of 2.92 min at 355 nm is obtained for pure TATB when the flow rate is 2.0 mL/min. The linearity of the detector response has been studied with sample concentrations ranging from 10 to 50 mg/L. The method addresses two important issues of sample preparation and the precision of measurement. Unlike the previously reported HPLC techniques which mainly aimed at the detection of TATB, the present work is a validated account of a quantitative estimation of purity. Regular production batch samples have been assayed by this method and the results are compared with those obtained from the conventional analysis. The HPLC method is convenient and reliable for quality control of the product at the plant level.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 3; 641-657
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gniazdowanie brzegówki Riparia riparia i żołny Merops apiaster w Centralnej Polsce
Breeding of the Sand Martin Riparia riparia and European Bee-Eater Merops apiaster in central Poland
Autorzy:
Boguszewski, P.
Boulton, G.
Kielan, S.
Malik, P.
Maniakowski, M.
Matyjasiak, L.
Nowicki, M.
Sieczak, K.
Tabor, J.
Tecza, R.
Wezyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/33007.pdf
Data publikacji:
2019
Wydawca:
Mazowiecko-Świętokrzyskie Towarzystwo Ornitologiczne
Tematy:
Polska Centralna
gniazdowanie
brzegowka
Riparia riparia
zolna
Merops apiaster
rzeka Pilica
liczebnosc
Źródło:
Kulon; 2019, 24
1427-3098
Pojawia się w:
Kulon
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact Strength of AE-type Alloys High Pressure Die Castings
Autorzy:
Braszczyńska-Malik, K.
Malik, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/947603.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
AE-type alloy
aluminum
rare earth elements
high pressure die casting
impact strength
magnesium alloy
stop typu AE
stop magnezu
aluminium
pierwiastki ziem rzadkich
odlewanie ciśnieniowe
udarność
Opis:
The results of the Charpy impact test of AE-type magnesium alloys produced by the high pressure die casting method are presented. Three alloys with different weight fractions of rare earth elements (RE; e.g. 1, 3 and 5 wt%) and the same mass fraction of aluminium (5 wt%) were prepared. The casts were fabricated using a typical cold chamber high pressure die casting machine with a 3.8 MN locking force. Microstructural analyses were performed by means of a scanning electron microscope (SEM). The impact strength (IS) was determined using a Charpy V hammer with an impact energy equal to 150 J. The microstructure of the experimental alloys consisted of an [alpha]-Mg solid solution and Al11RE3, Al10Ce2Mn7 and Al2RE intermetallic compounds. The obtained results show the significant influence of the rare earth elements to aluminium ratio on the impact strength of the investigated materials. Lower the RE/Al ratio in the chemical composition of the alloy results in a higher impact strength of the material.
Źródło:
Archives of Foundry Engineering; 2020, 20, 3; 5-8
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Partially Melted Zone in Mg-Al Type Alloy After Gas-tungsten Arc Welding
Autorzy:
Braszczyńska-Malik, K. N.
Przełożyńska, E.
Mróz, M.
Powiązania:
https://bibliotekanauki.pl/articles/381760.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mg-Al-Zn alloy
gas tungsten arc welding
partially melted zone
stop Mg-Al-Zn
spawanie łukowe
strefa przetopienia
Opis:
The gas-tungsten arc (GTA) welding behaviors of the commercial AZ91 magnesium alloy were examined in terms of microstructure characteristics. This study focused on the effects of the GTAW process parameters (like welding current, welding speed and method of additional cooling of the welded samples) on the size of the fusion zone (FZ) and partially melted zone (PMZ). The PMZ morphology of the eutectic regions changed from less to more divorced in the direction from the FZ to the base metal. The largest PMZ was obtained at a low welding speed (3.33 mm/s) and without additional water cooling of the samples.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 18-21
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Replication kinetics of neuropathogenic and non-neuropathogenic equine herpesvirus type 1 (EHV-1) strains in primary murine neurons and ED cell line
Autorzy:
Cymerys, J.
Slonska, A.
Brzezicka, J.
Tucholska, A.
Chmielewska, A.
Rola, J.
Malik, P.
Banbura, M.W.
Powiązania:
https://bibliotekanauki.pl/articles/32263.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
Equine herpesvirus type 1 (EHV-1) causes respiratory infections, abortion and neurological disorders in horses. Molecular epidemiology studies have demonstrated that a single-point mutation in DNA polymerase gene, resulting in an amino acid variation (N752/D752), is significantly associated with the neuropathogenic potential of EHV-1 strains. The aim of the study was to elucidate if there are any differences between neuropathogenic (EHV-1 26) and non-neuropathogenic (Jan-E and Rac-H) EHV-1 strains in their ability to infect neuronal cells. For the tested EHV-1 strains, cytopathic effect (CPE) was manifested by changed morphology of cells, destruction of actin cytoskeleton and nuclei degeneration, which led to focal degeneration. Moreover, EHV-1 26 strain caused fusion of the infected cells to form syncytia in culture. Real-time PCR analysis demonstrated that both neuropathogenic and non-neuropathogenic EHV-1 strains replicated in neurons and ED cells (equine dermal cell line) at a similar level. We can assume that a point mutation in the EHV-1 polymerase does not affect viral replication in this cell type.
Źródło:
Polish Journal of Veterinary Sciences; 2016, 19, 4
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka właściwości użytkowych stopu magnezu z powłoką hydroksyapatytową
Characteristics of utilizable properties of magnesium alloy with the hydroxyapatite coating
Autorzy:
Dudek, A.
Malik, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/284888.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomateriały
implanty
hydroksyapatyt
biomaterials
implants
hydroxyapatite
Opis:
Zainteresowanie biomateriałami, związane z możliwością zastosowania ich na implanty, wywołuje z jednej strony nieustanny wzrost wymagań stawiany tego typu materiałom, z drugiej natomiast, poszukiwanie nowych metod i technologii poprawiających ich własności użytkowe [1-2]. W ciągu ostatnich 10 lat, znacznie wzrosło zastosowanie magnezu i jego stopów, szczególnie w zastosowaniach medycznych. Zjawisko to związane jest głównie z bardzo korzystnymi własnościami tych materiałów takich jak: niska gęstość czy wysokie własności wytrzymałościowe. Zainteresowanie stopami magnezu, jako biomateriału skupia się głównie na zastosowaniach implantologicznych. Związane jest to głównie z tym, że materiał ten jest biokompatybilny i bioresorbowalny. Ponadto, jego właściwości mechaniczne są bliskie naturalnej kości w porównaniu z innymi metalami wykorzystywanymi, jako biomateriały na implanty (np. stopy Ti i Co-Cr) [1-4]. Magnez i jego stopy są materiałami biodegradowalnymi w ludzkich płynach organicznych, jednocześnie ich słaba odporność na korozję może doprowadzić do nagłej awarii implantów. W ramach niniejszej pracy stop magnezu (AZ91) pokryto metodą metalurgii proszków powłoką hydroksyapatytu w celu poprawy jego biodegradacji. Priorytetowym celem proponowanych w ramach niniejszej pracy badań była analiza własności wytrzymałościowych na granicy powłoka-podłoże. Własności te zostały określone przy pomocy testu, polegającego na zarysowaniu (Scratch Test) powłoki ceramicznej. Określono ponadto skład fazowy powstałych powłok.
Growing interest in biomaterials, combined with opportunities of their use for implants causes, on the one hand, incessantly growing expectations imposed on these materials. On the other hand, new methods and technologies improving their functional properties are required. The industrial application of Mg has increased rapidly in the last 10 years. The increased usage of Mg is due to its lightweight, high specific stiffness and strength. There has been interest in using Mg as a biomaterial for bone replacement as it is biocompatible and bioresorbable. Moreover, mechanical properties of magnesium are closer to natural bones compared with other metallic materials used as biomaterial implants (e.g. Ti alloys, Co-Cr alloys). Magnesium and its alloys are potential biodegradable implant materials due to their attractive biological properties. However, their poor corrosion resistance may result in a sudden failure of the implants. In this study, a magnesium alloy (AZ91) was coated with hydroxyapatite to improve its biodegradation performance. A priority goal of the investigations presented within this work was to improve mechanical properties on the base material - coating interface. These properties were determined by means of scratch tests on the ceramic coating.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 42-45
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potential of endochitinase gene to control Fusarium wilt and early blight disease in transgenic potato lines
Autorzy:
Fatima, Neelam
Tabassum, B.
Yousaf, I.
Malik, M.
Khan, A.
Sajid, I.A.
Tariq, M.
Toufiq, N.
Riaz, S.
Nasir, I.A.
Powiązania:
https://bibliotekanauki.pl/articles/2084713.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
early blight disease
Fusarium
potato
Trichoderma
Opis:
Potato (Solanum tuberosum L.), an important food crop in the world, is susceptible to many fungal pathogens including Alternaria solani and Fusarium oxysporum causing Fusarium wilt and early blight diseases. Mycoparasitic fungi like Trichoderma encode chitinases, cell wall degrading enzymes, with high antifungal activity against a wide range of phytopathogenic fungi. In this study, a binary vector harboring endochitinase gene of ~1,000 bp was constructed and used to transform potato nodes through Agrobacterium-mediated transformation. Out of several primary transformants, two transgenic potato lines were verified for transgene insertion and integration by Southern blot. In a pot experiment for Fusarium resistance, the transgenic potato lines didn’t show any symptoms of disease, instead they remained healthy post infection. The transgenic potato lines exhibited 1.5 fold higher mRNA expression of endochitinase at 7 days as compared to 0 day post fungus inoculation. It was evident that the mRNA expression decreased over days of inoculation but was still higher than at 0 day and remained stable upto 30 days post inoculation. Similarly, for A. solani infection assay, the mRNA expression of the endochitinase gene was 3 fold higher 7 days post inoculation compared to expression at 0 day. Although the expression decreased by1.2 fold during subsequent days post infection, it remained stable for 30 days, suggesting that protection in transgenic potato plants against fungal pathogens was achieved through an increase in endochitinase transcript.
Źródło:
Journal of Plant Protection Research; 2019, 59, 3; 376-382
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dendrochronologiczny zapis osiadania terenu wywołanego przez górnictwo podziemne (Wyżyna Śląska)
Dendrochronological record of terrain subsidence caused by underground mining (Silesian Upland)
Autorzy:
Franek, M.
Wistuba, M.
Malik, I.
Powiązania:
https://bibliotekanauki.pl/articles/881951.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
Wyzyna Slaska
gornictwo wegla kamiennego
osiadanie gruntu
obnizenia terenowe
lasy mieszane
sosna zwyczajna
Pinus sylvestris
dab szypulkowy
Quercus robur
drewno reakcyjne
dekoncentrycznosc
redukcja przyrostu
dendrochronologia
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2016, 18, 3[48]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ wstrząsów sejsmicznych na przyrost radialny i anatomię drewna wybranych gatunków drzew (Podhale, Polska i Wenchuan, Chiny)
Impact of earthquakes on radial growth and wood anatomy of selected tree species (Podhale, Poland and Wenchuan, China)
Autorzy:
Gawior, D.
Wistuba, M.
Malik, I.
Tie, Y.
Michalowicz, P.
Jiang, J.
Powiązania:
https://bibliotekanauki.pl/articles/882771.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
Tematy:
drzewa lesne
swierk pospolity
Picea abies
jodla
Abies chensiensis
przyrost drzew
przyrosty radialne
zaburzenia
trzesienia ziemi
Podhale
Polska
Gory Sino-Tybetanskie
Chiny
Źródło:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2016, 18, 3[48]
1509-1414
Pojawia się w:
Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
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:
The State of Water and Wastewater Management in the Municipalities of the Roztocze National Park
Autorzy:
Jóźwiakowski, K.
Podbrożna, D.
Kopczacka, K.
Jaguś, M.
Marzec, M.
Listosz, A.
Pochwatka, P.
Kowalczyk-Juśko, A.
Malik, A.
Powiązania:
https://bibliotekanauki.pl/articles/123660.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
municipality
water supply
sewage system
sewage treatment plant
septic tank
national park
Opis:
The aim of this paper is to present the current state of water and sewage management in the communes where the Roztocze National Park (RNP) is located. The park is located in Lubelskie voivodship, in the territory of four communes: Zamość, Zwierzyniec, Adamów and Józefów, while its buffer zone is located in the communes of Krasnobród, Tereszpol and Szczebrzeszyn. The paper uses data from surveys conducted in these municipalities in 2016. On average, 68.9% of the population used the water supply system in the municipalities surveyed, while 33.4% of the inhabitants had the possibility of discharging sewage to the sewerage system. In the area of the communes, there are 10 collective, mechanical and biological wastewater treatment plants with a capacity exceeding 5 m3·d-1. The households which are not connected to the sewage network discharge wastewater mainly to non-return tanks. Four out of the seven surveyed communities had 64 domestic sewage treatment plants, including 60 systems with infiltration drainage, which do not ensure high efficiency of removing pollution and may even contribute to the degradation of groundwater quality. In order to solve the existing problems in the area of sewage and water management occurring in the communes where the Roztocze National Park is located, it is necessary to further develop collective sewage systems and equip the areas with dispersed buildings with highly efficient, residential sewage treatment plants, e.g. constructed wetlands.
Źródło:
Journal of Ecological Engineering; 2018, 19, 2; 255-262
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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