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Wyszukujesz frazę "Pigments" wg kryterium: Temat


Tytuł:
Algal pigments in Hornsund (Svalbard) sediments as biomarkers of Arctic productivity and environmental conditions
Autorzy:
Krajewska, Magdalena
Szymczak-Żyła, Małgorzata
Kowalewska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/2042142.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
HPLC
Pigments
sediments
Spitsbergen
Źródło:
Polish Polar Research; 2017, 38, 4; 423-443
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of mould fungus on pigments used in wall and ceiling décor on the example of the wooden church of Saint George in Ostropa
Autorzy:
Lipiec, Adrianna
Andres, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/2200190.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
polychrome
pigments
CIELAB
mould
Aspergillus niger
Opis:
The influence of mould fungus on pigments used in wall and ceiling décor on the example of the wooden church of Saint George in Ostropa. This research aimed to establish the change in colour of selected pigments used in polychrome due to the effects of Aspergillus niger. The research was conducted on the following pigments: cremnitz white, zinc white, vermilion, colcothar, chrome green, artificial ultramarine, burnt umber, carbon black, smalt, minium, azurite, Prussian blue and chalk. Measurements were taken using a colorimeter in the CIELAB colour space. The biggest change in colour was exhibited by artificial ultramarine, while the most stable in colour turned out to be minium. The smallest change in colour of dried samples was shown by burnt umber, while the biggest change was noted again for artificial ultramarine.
Wpływ grzybów pleśniowych na pigmenty stosowane w dekoracjach ścian i stropów na przykładzie drewnianego kościoła pw. Św. Jerzego w Ostropie. Przedmiotem badań było ustalenie zmiany barwy wybranych pigmentów stosowanych w polichromii, pod wpływem działania Aspergillus niger. Badania przeprowadzono na następujących pigmentach: biel kremska, biel cynkowa, cynober, czerwień żelazowa, zieleń chromowa, ultramaryna sztuczna, umbra palona, czerń węglowa, smalta, minia, azuryt, błękit pruski oraz kreda. Pomiary wykonano przy użyciu kolorymetru w przestrzeni barw CIELAB. Największą zmianę barwy próbek poddanych działaniu grzyba testowego wykazała ultramaryna sztuczna, natomiast najbardziej stabilną barwą charakteryzowała się minia. Najmniejszą zmianę barwy próbek wysuszonych po działaniu grzyba pleśniowego cechowała się umbra palona, natomiast największą odnotowano również w przypadku sztucznej ultramaryny.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 110; 48--53
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass Spectrometric Detection of New Betalains in Mammillaria Flowers
Autorzy:
Szot, Dominika
Starzak, Karolina
Skopińska, Anna
Wybraniec, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/1034229.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Cactaceae
LC-MS
Mammillaria
betacyanins
natural pigments
Opis:
Betacyanins are natural, red-violet betalain pigments which can be found in plenty of plants of the Cactaceae family. The Mammillaria is the widest genus of the Cactaceae family of which fruit was examined for betacyanins contents. As a result of the investigation, a new pigment structure, mammillarinin, was identified. Heretofore, no betacyanins of Mammillaria coronata flowers has been extensively studied. In this report, the results of betacyanin analysis by LC-DAD-ESI-MS/MS in the flower extract are presented.
Źródło:
Zeszyty Naukowe Towarzystwa Doktorantów Uniwersytetu Jagiellońskiego. Nauki Ścisłe; 2015, 10; 189-196
2082-3827
2084-977X
Pojawia się w:
Zeszyty Naukowe Towarzystwa Doktorantów Uniwersytetu Jagiellońskiego. Nauki Ścisłe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic Modelling of Betalain Stability and Color Changes in Yogurt During Storage
Autorzy:
Guneser, Onur
Powiązania:
https://bibliotekanauki.pl/articles/1363260.pdf
Data publikacji:
2021-04-20
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
natural pigments
betalains
yogurt
reaction kinetics
color
Opis:
Assessment of the storage stability of betalains added to food during processing is crucial to estimate the shelf-life of colored food products and the potency of natural food colorants. The stability of beetroot betalains in yogurt during storage was evaluated in this study. Kinetic experiments were conducted at storage temperatures of 4°C, 10°C, and 20°C. The relationships were also determined between the betalain degradation and lightness (L*), redness (a*), and yellowness (b*). First-order kinetics was observed in the betalain degradation, and the changes in color parameters of the yogurt samples fitted zero-order kinetics. The activation energy required for the degradation of betalains and changes in L*, a*, and b* was found as 104.9, 67.6, 76.5, and 86.1 kJ/mol, respectively. The half-life period of the degradation of red beet betalains was found as 51.43, 30.91, and 4.54 days at 4°C, 10°C, and 20°C, respectively. Multiple linear regression models were also established for betalain content and color parameters. There was a decrease in betalain content and a* color value in the yogurt colored with a beetroot extract during storage. A significant positive correlation was found between pH, a* value, and betalain content in yogurt, while a significant negative correlation was found between betalain content and L* and b* values. Further studies need to be carried out to reveal the relationship between color parameters and natural pigments in food systems.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2021, 71, 2; 135-145
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Allelopathic activity of the Synechococcus sp. (Cyanobacteria, Chroococcales) on selected cyanobacteria species
Autorzy:
Śliwińska-Wilczewska, Sylwia
Gergella, Kinga
Latała, Adam
Powiązania:
https://bibliotekanauki.pl/articles/2182150.pdf
Data publikacji:
2016-12-31
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
allelopathy
cyanobacteria
fluorescence
growth
photosynthesis
photosynthetic pigments
Opis:
Picocyanobacterium Synechococcus sp. is very important but still poorly understood component of marine and freshwater ecosystems. In this study, the effect of single and multiple addition of cell-free filtrate obtained from Synechococcus sp. on selected cyanobacteria Synechocystis sp., Geitlerinema amphibium, Nodularia spumigena and Nostoc sp. was investigated. The species present in this work are groups of aquatic phototrophs known to co-occur in the Baltic Sea. The study showed that the picocyanobacterial cell-free filtrate inhibit the growth and changed the cell morphology of filamentous cyanobacteria G. amphibium, N. spumigena and Nostoc sp. It was shown that the addition of cell-free filtrate caused a decline of pigmentation and cell lysis of G. amphibium, N. spumigena and Nostoc sp. compared to the control culture. In addition, it was observed that the filtrate obtained from Synechococcus sp. did not affect the Synechocystis sp. It was found that the filtrate obtained from picocyanobacterium had the strongest effect on growth of G. amphibium, therefore for this cyanobacteria performed additional experiments to showed whether the filtrate affected also photosynthetic pigments, chlorophyll fluorescence and photosynthesis. The study proved that the picocyanobacterial allelopathic compounds reduce the efficiency of photosynthesis, which results in the inhibition of growth of target organisms. This way of interaction may explain the formation of almost monospecific cyanobacterial blooms in many aquatic ecosystems, including in the Baltic Sea.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2016, 1; 115-126
2543-8832
2545-0999
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
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:
Separation and Immobilization of Vanadium from Industrial Fly Ash as an Insoluble Inorganic Pigmen
Autorzy:
Kwolek, P.
Czubajewski, K.
Wojnicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/351844.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
recovery
inorganic pigments
solubility
vanadium
bismuth
immobilisation
Opis:
It has been shown that the precipitation of bismuth orthovanadate from a fly ash leachate is a promising method of vanadium recovery. BiVO4 obtained after appropriate heat treatment can be sold as a pigment. The yield of recovery of solubilised vanadium is equal to 68% and the precipitate is free from nickel impurity. The precipitate is insoluble in the solutions with pH ≥ 3. In more acidic media the solubility of precipitate increases with the decreasing pH. The solubility of the precipitate increases also with the increasing concentration of chloride ions.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 901-909
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of Assimilation Pigments in the Photosynthectic Apparatus of Maple (Acer platanoides L.) Growing In Various Site Conditions of Szczecin
Zawartość barwników asymilacyjnych w aparacie fotosyntetycznym klonu zwyczajnego (Acer platanoides L.) rosnącego w różnych warunkach siedliskowych Szczecina
Autorzy:
Malinowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/389363.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
barwniki asymilacyjne
Acer platanoides L.
assimilation pigments
Opis:
The present study shows the results of the research work on the content of assimilation dyes in the leaves of Acer platanoides L., growing in different site conditions in Szczecin. The variance analysis showed a significant influence of the site and the date on the content of the studied physiological parameters. Lower amounts of chlorophyll and carotenoids were obtained in the leaves of trees growing along the street of high volume of traffic. On the basis of the correlation coefficient, a significant negative correlational relationship was recorded between the concentration of Cd, Pb, Fe and Cu in the leaves and the content of chlorophyll a and b in the leaves of Acer platanoides.
W pracy przedstawiono wyniki badań zawartości barwników asymilacyjnych w lioeciach Acer platanoides L., rosnącego w różnych warunkach siedliskowych Szczecina. Analiza wariancji wykazała istotny wpływ stanowiska i terminu na zawartość badanych parametrów fizjologicznych. Obniżone zawartości chlorofilu i karotenoidów uzyskano w lioeciach drzew rosnących przy ulicy o dużym natężeniu ruchu samochodowego. Na podstawie wartości współczynnika korelacji stwierdzono ujemną istotną zależność korelacyjną pomiędzy koncentracją Cd, Pb, Fe i Cu w lioeciach a zawartością chlorofilu a i b w liściach Acer platanoides.
Źródło:
Ecological Chemistry and Engineering. A; 2011, 18, 3; 377-384
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineral composition of pigments and plasters from the Hatshepsut Temple in Deir el Bahari, Upper Egypt
Autorzy:
Pawlikowski, M.
Trąbska, J.
Trybalska, B.
Powiązania:
https://bibliotekanauki.pl/articles/343981.pdf
Data publikacji:
2006
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
świątynia Hatshepsut
pigmenty
Hatshepsut temple
mineral composition
pigments
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2006, 1; 1-45
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of Anitranspirant di-1-p-menthene on Some Physiological Traits of Strawberry
Autorzy:
Mikiciuk, G.
Mikiciuk, M.
Ptak, P.
Powiązania:
https://bibliotekanauki.pl/articles/952412.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
strawberry
pinolene
Vapor Gard
gas exchange
assimilation pigments
Opis:
Strawberry is a species sensitive to water shortages, especially during fruit growth and ripening. One method of limiting water loss in plant production involves the use of antitranspirants, which reduce plant transpiration. One method of limiting water loss in plant production involves the use of antitranspirants, which reduce plant transpiration. One of substances used for this purpose is, amongst others, natural terpene polymer di-1-p-menthene (pinolene). Research on the influence of a pinolene-containing antitranspirant (with the commercial name of Vapor Gard) on gas exchange parameters (intensity of net CO2 assimilation, intensity of transpiration, stomatal conductance for water, substomatal CO2 concentration), the water balance and the content of assimilation pigments (chlorophyll “a”, “b”, total chlorophyll, carotenoids) in the leaves of the cv. ‘Salsa’ strawberry was conducted in the years 2009–2010. The antitranspirant was used once at a concentration of 0.75% before flowering. The measurements were performed four times: before flowering (1st measurement date), when the plants were in full flowering (2nd measurement date), in the middle of the harvest season (3rd measurement date) and after the end of the harvest season (4th measurement date). Foliar application of the Vapor Gard antitranspirant decreases the intensity of strawberry transpiration without changing the CO2 assimilation activity. Plants sprayed with the tested preparation were characterised by a higher relative water content (RWC) in leaves and a higher value of the photosynthetic index of water use efficiency (WUE). The antitranspirant did not influence the content of assimilation pigments in straw-berry leaves. The values of the determined physiological features depended on the measurement date (developmental stage) of the tested strawberry cultivar.
Źródło:
Journal of Ecological Engineering; 2015, 16, 4; 161-167
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Induction of phytochelatins and flavonoids in cadmium polluted Berberis thunbergii
Autorzy:
Chadzinikolau, Tamara
Kozłowska, Monika
Mleczek, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/957022.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
heavy metals
barberry
phytochelatin synthase
phytochelatins
flavonoids
chloroplast pigments
Opis:
Cadmium tolerance has been widely studied in various plant species. The study was undertaken to assess the response of Berberis thunbergii, commonly growing under urban conditions, to increasing concentrations of cadmium (1, 4 and 16 mg of Cd kg–1 soil). Experiments were conducted from June to August in a greenhouse. Accumulation of cadmium ions in barberry leaves was observed, at a simultaneous occurrence of mechanisms reducing its harmful effects by an increased synthesis of phytochelatins (PCs). Generation of PCs – putative heavy metal chelators was related to the phytochelatin synthase activity (PCS) and the level of metal accumulation. Increased contents of anthocyanins and flavonols in cadmium polluted barberry, considering that it is a coloured-leaf plant seems important in aspect of their multifunctional role in plant-environment interactions. Besides the capacity to chelate heavy metals, flavonoids are antioxidants and efficiently scavenge free radicals. Moreover, the content of chloroplast pigments was determined, but the changes were non-significant.
Źródło:
Dendrobiology; 2017, 77; 139-146
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of bilirubin ditaurate by the intestinal bacterium Clostridium perfringens
Autorzy:
Koníčková, Renata
Jirásková, Alena
Zelenka, Jaroslav
Lešetický, Ladislav
Štícha, Martin
Vítek, Libor
Powiązania:
https://bibliotekanauki.pl/articles/1039751.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
bilirubin ditaurate
bile pigments
urobilinoids
intestinal metabolism
Clostridium perfringens
Opis:
Bilirubin is degraded in the human gut by microflora into urobilinoids. In our study we investigated whether the bilirubin-reducing strain of Clostridium perfringens can reduce bilirubin ditaurate (BDT), a bile pigment of some lower vertebrates, without hydrolysis of the taurine moiety. C. perfringes was incubated under anaerobic conditions with BDT; reduction products were quantified by spectrophotometry and separated by TLC. Based on Rf values of BDT reduction products and synthetic urobilinogen ditaurate, three novel taurine-conjugated urobilinoids were identified. It is likely that bilirubin-reducing enzyme(s) serve for the effective disposal of electrons produced by fermentolytic processes in these anaerobic bacteria.
Źródło:
Acta Biochimica Polonica; 2012, 59, 2; 289-292
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Revision of the genus Daldinia in the KRAM herbarium collection: Daldinia childiae, D. loculata and D. loculatoides, three new species for Poland
Autorzy:
Chlebicki, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2183579.pdf
Data publikacji:
2022-07-12
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Daldinia
stromatal pigments
wood-inhabiting fungi
fungi-associated insects
Opis:
The article presents the results of the revision of Daldinia (Ascomycota) specimens preserved in KRAM F (Kraków, Poland). The following species were identified: Daldinia childiae, D. decipiens, D. loculata, D. loculatoides, D. petriniae and D. vernicosa. Three of them were not reported from Poland so far: D. childiae, D. loculata, D. loculatoides. Aditionaly to Polish specimens, also some collections from outside Poland are kept in KRAM F: one specimen of D. concentrica from Bulgaria, D. lloydii from Ukraine and D. eschscholtzii from Cameroon.
Artykuł zawiera wyniki rewizji okazów z rodzaju Daldinia (Ascomycota), przechowywanych w zbiorach KRAM F. W kolekcjach stwierdzono następujące gatunki: D. childiae, D. decipiens, D. loculata, D. loculatoides, D. petriniae i D. vernicosa. Trzy z nich nie były do tej pory podawane z terenu Polski: D. childiae, D. loculata, D. loculatoides. W zbiorach KRAM F znajdują się również kolekcje spoza Polski: jeden okaz D. concentrica z Bułgarii, D. lloydii z Ukrainy i D. eschscholtzii z Kamerunu.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2022, 7; 61-73
2543-8832
2545-0999
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified titanium dioxide for 3D printing applications
Autorzy:
Sztorch, Bogna
Głowacka, Julia
Hanuszewska, Anna
Romańczuk-Ruszuk, Eliza
Konieczna, Roksana
Przekop, Robert
Powiązania:
https://bibliotekanauki.pl/chapters/2204277.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
biocomposites
PLA
titanium dioxide
pigments
organosilicon modifiers
functional nanocomposites
Opis:
This chapter describes the methodology of obtaining polylactide (PLA) biocomposites with the TiO2 modified by organosilicon compounds: disiloxane and functionalized octaspherosilicate designed for use in additive technologies. The paper presents general information about polylactide, titanium dioxide and the used organosilicon modifiers (silsesqioxanes and polysiloxanes). In the paper the authors compare the effect of two types of TiO2 from different manufacturers on the properties of polymer biocomposites, which can be used in biomedical applications. The properties of the obtained composites with the use of additive FDM technology were characterized mechanically (tensile strength, flexural strength, impact strength), and the particle size of the TiO2 pigment nanofillers used was measured. All the composites were pretreated using a plastic processing technique with two different mass ratios of TiO2 filler content (1.5%; 0.5%). The properties of PLA/TiO2 composites depend on the filler concentration. The applied fillers had a positive effect on the improvement of the mechanical properties of the produced polymer composites. This effect was additionally intensified by the introduction of organosilicon modifiers.
Źródło:
Advances in biomedical engineering; 165–179
9788367185400
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physiological reaction of common osier (salix viminialis l.) Var. Jorr to the presence of lead in the subsoil
Autorzy:
Malinowska, K.
Malinowski, R.
Stera, A.
Powiązania:
https://bibliotekanauki.pl/articles/952335.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
lead
photosynthetic pigments
CO2 assimilation
transpiration
common osier
Opis:
The effect of lead ions of the concentrations within the range of 15–1000 mg∙dm-3 on the physiological reaction of common osier var. Jorr was examined. The content of assimilation pigments, the rate the CO2 assimilation, transpiration, the indices of relative water content and the deficit of water saturation and the content of lead in the nutrient solution. The studied physiological parameters in common osier var. Jorr were differentiated by the rate of lead ions in the nutrient solution. The Jorr variety of common osier was characterised by good values of the determined physiological parameters under stressful conditions at a large accumulation of lead. This suggests that it shows quite a high tolerance to the stress caused by contamination of the subsoil with lead.
Źródło:
Journal of Ecological Engineering; 2015, 16, 2; 110-115
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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