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Wyszukujesz frazę "Carbon" wg kryterium: Temat


Tytuł:
The impact of changing energy mix of Turkey on CO2 emission intensities
Autorzy:
Köne, A. C.
Büke, T.
Powiązania:
https://bibliotekanauki.pl/articles/207324.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Laspeyres method
fuel carbon
carbon dioxide
Turkey
metoda Laspeyresa
paliwa kopalne
dwutlenek węgla
Turcja
Opis:
A decomposition analysis of energy-related carbon dioxide emission intensities in Turkey from 1971 to 2010 has been presented. The refined Laspeyres method is used in the calculation to identify fossil fuel carbon effect, fossil fuel share effect and energy intensity effect that accelerate or reduce the increase in carbon dioxide emission intensities. The results show that the fossil fuel share effect and the energy intensity effect are the two biggest contributors to CO2 emission. The case analysis also shows that fossil fuel carbon effects play important roles in the decrease of CO2 emission intensities especially from 1988 to 2010.
Źródło:
Environment Protection Engineering; 2016, 42, 3; 85-93
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on relationship between carbon dioxide emissions, imports, exports, and population in China
Autorzy:
Jin, Q.-Y.
Zhang, J.
Gao, Y.-Q.
Su, X.
Fu, Y.-S.
Powiązania:
https://bibliotekanauki.pl/articles/207318.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
population statistics
carbon dioxide
global warming
carbon dioxide emissions
total carbon
statystyki ludności
dwutlenek węgla
globalne ocieplenie
emisja dwutlenku węgla
węgiel całkowity
Opis:
Empirical relationships between carbon dioxide emission, imports, exports, and population have been investigated. An empirical model with carbon dioxide emissions, structure and scale of import and exports, populations was built Using ridge regression analysis and observed data from 1985 to 2006 in China, we examined the relationship between each part of carbon dioxide emission and corresponding coefficients, including GIV (gross imports value), GXV (gross exports value), and P (populations). The results have shown that the increasing trend in TCOE (total carbon dioxide emissions) was determined by the exports, while its standard level is determined by population. Increasing the imports may reduce TCOE. Considering working to expand economy, the best ways for China to reduce TCOE are to introduce advanced technology and take actions to guarantee strict execution of cut-emission policy. Although the increasing imports also can reduce TCOE, it is not reasonable for the global cut-emission policy. To control population is not applicable as the immense population base, so government's publicity for low-carbon live is a necessary and feasible way to reduce carbon dioxide emission.
Źródło:
Environment Protection Engineering; 2014, 40, 2; 75-85
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Storage capacity of organic carbon in the reclaimed postmining technosols
Autorzy:
Greinert, A.
Drab, M.
Śliwińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/207371.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
organic carbon
carbon accumulation
storage capacity
pinus sylvestris
węgiel organiczny
akumulacja węgla
powierzchnia magazynowa
sosna zwyczajna
Opis:
Soil is a huge reservoir of carbon, which is both organically and chemically bounded. Sequestration ability of soil amounting to 0.9±0.3 Pg C.y-1represents significant item in carbon balance. Reclamation activities aimed at soil creating contributes to the carbon binding in the form of complex compounds. This work characterizes fluctuations of organic carbon in post-lignite-mining sites located in Leknica (Poland, Lubuskie Province) after afforestation with Pinus sylvestris. The results present the situation 25 years after the reclamation field experiment commencement Satisfactory effect in growth and development of pine forest was accomplished by liming and NPK application. After 25 years of the experiment start point, the litter deposition gained 2.5-4.0 cm and the initial humic horizon, lying directly beneath reached 4.0-6.5 cm. An average carbon accumulation in surface litter amounted to 2.86 kg.m-2and in initial humic horizons to 0.68 kg.m-2. This indicates an average sequestration of 130 Mg CO2per 1 ha of reclaimed area.
Źródło:
Environment Protection Engineering; 2018, 44, 1; 117-127
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Filter beds supplemented with powdered activated carbon
Autorzy:
Bielski, A.
Zymon, W.
Powiązania:
https://bibliotekanauki.pl/articles/208040.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
PAC
powdery activated carbon
sedimentation
coagulation
złoże filtracyjne
sedymentacja
koagulacja
Opis:
Various factors influencing adsorption on powdered activated carbon (PAC) used for the removal of organic compounds from water and wastewater have been investigated. Incomplete utilization of adsorption capacity of PAC observed in current technological applications is caused by too short con-tact times of aqueous solutions with carbon particles and the system configuration (adsorption in volume systems with simultaneous coagulation). A new method has been proposed involving application of PAC into the upper layer of a two-layer filter or a middle layer of a three-layer filter during bed fluidization. The extended contact time between aqueous solutions and PAC increases the amount of adsorbate adsorbed on the surface of activated carbon. A comparative studies conducted on adsorption in both volume and column systems confirmed better utilization of adsorption capacity for PAC applied on a filter bed. Two models of PAC adsorption in transient conditions were developed for volume and column systems. Computer simulations confirmed that the adsorption capacity of PAC may be in-creased by several times in column systems with respect to the commonly used adsorption with coagulation in volume systems.
Źródło:
Environment Protection Engineering; 2017, 43, 2; 173-191
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of surfactant-modified montmorillonite in nitrophenol removal by adsorption
Autorzy:
Baysal, Gülay
Powiązania:
https://bibliotekanauki.pl/articles/207393.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nitrophenol removal
activated carbon
NMR
usuwanie nitrofenoli
węgiel aktywny
Opis:
Quaternary ammonium salts (QASs) such as 1-methyl-di-nonyl-1 phenyl ammonium iodide (QAS1) and 1-methyl-di-dodecyl-1 phenyl ammonium iodide (QAS2) were newly synthesized by complete alkylation reaction for modification of sodium montmorillonite (Mt). The sodium montmorillonite was modified via an ion-exchange reaction with QAS1 and QAS2, and two organoclays, Mt1 and Mt2, have been obtained. The synthesized quaternary ammonium salts were analyzed by nuclear magnetic resonance spectroscopy (NMR). The organoclays (Mt1 and Mt2) were characterized by a range of methods including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The adsorption capacities of the synthesized organo-montmorillonites for the hydrophobic organic pollutant 4-nitrophenol (4-NP) have been evaluated. The distances between the organoclay layers showed a much better opening than that reported in the literature. The results show that the adsorption capacity increased in the order Mt2 > Mt1. The adsorption capacities of Mt1 and Mt2 for 4-NP were 77% and 81%, respectively.
Źródło:
Environment Protection Engineering; 2019, 45, 2; 19-33
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PAC adsorption efficiencies in the filter and in the homogeneous flocculator. A full-scale comparative study
Autorzy:
Bielski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2057620.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
PAC
powdered activated carbon
adsorption
flocculation
sproszkowany węgiel aktywny
adsorpcja
flokulacja
Opis:
The paper investigates the efficiency of adsorption of organic pollutants present in natural water on powdered activated carbon (PAC). A PAC adsorption capacity is related to the mass exchange driving force between water and sorbent. During the study, it was confirmed that the mass transfer driving force in the homogeneous flocculator with simultaneous PAC adsorption was lower than in the filter column. The filter showed a better utilization of PAC adsorption capacity than the volume system, for the optimal PAC dose. The authors proposed a new method where adsorption was carried out in the filter column with PAC applied to its upper layer. The powdered sorbent was applied to the bed at the end of a backwashing cycle. Two models of PAC adsorption in transient states for the homogeneous flocculator and the column mass exchanger were presented. The simulation calculations confirmed that there was still a possibility to double the PAC adsorption capacity concerning commonly used adsorption with coagulation in the homogeneous flocculator.
Źródło:
Environment Protection Engineering; 2022, 48, 1; 83--97
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the treatment of fluorine-containing wastewater by precipitation-adsorption process
Autorzy:
Li, Xiaochang
Lyu, Xianjun
Powiązania:
https://bibliotekanauki.pl/articles/24201032.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage
fluorine
activated carbon
adsorption
ścieki
fluor
węgiel aktywny
adsorpcja
Opis:
Fluorine-containing wastewater from the Yuncheng Sewage Treatment Plant in Heze City, Shan-dong Province was treated by coagulation and precipitation with poly aluminum sulfate, and CaO chemical precipitation-activated carbon adsorption, with a view to reducing fluoride ions concentration in the wastewater to below the discharge standard. The results showed that the optimum conditions for the coagulation-sedimentation test of poly aluminum sulfate were as follows: the dosage of poly aluminum sulfate 0.3 g/dm3, initial pH value 4.0, the removal rate of fluoride ion in the fluorine-containing wastewater reached 98.46%, and the concentration of fluoride ion was 0.462 mg/ dm3, which reached the discharge standard (1.5 mg/ dm3); The optimum conditions for the CaO chemical precipitation, and lanthanum loaded activated carbon adsorption method were as follows: the amount of CaO 20 g/ dm3, initial pH of the chemical precipitation test 8.0, the dosage of lanthanum loaded activated carbon 10 g/ dm3, and the initial pH of the adsorption test 6.0. At this time, the removal rate of fluoride ions in the fluorine-containing wastewater reached 95.81%, and the concentration of fluoride ions was 1.26 mg/ dm3, which also met the discharge standard.
Źródło:
Environment Protection Engineering; 2023, 49, 2; 55--73
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photocatalytic degradation of reactive dyes and real textile composite wastewater using TiO2/MWCNT nanocomposite under UVA and UVA-LED irradiation. A comparative study
Autorzy:
Kumar, Deivanai Suresh
Sellappa, Kanmani
Powiązania:
https://bibliotekanauki.pl/articles/207478.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
carbon nanotubes
methylene blue
photodegradation
nanorurki węglowe
błękit metylenowy
fotodegradacja
Opis:
Nano TiO2 and TiO2/MWCNT nanocomposite synthesized by the sol-gel method were characterized by XRD, BET, SEM, EDAX and FTIR techniques. These nanoparticles were used for photocatalytic decolorisation and degradation of three different reactive dyes such as Reactive Orange 16 (RO 16), Reactive Yellow 145 (RY 145) and Reactive Red 195 (RR 195) and real textile composite wastewater under the UVA and UVA-LED irradiation at room temperature. The maximum color removal of 96% and COD removal of 72% were achieved after 5 h in the presence of TiO2/MWCNT and H2O2 under UVA-LED irradiation. The kinetic studies obey pseudo-first order kinetics which is discussed in terms of the Langmuir–Hinshelwood kinetic model. The maximum degradation of 50% was achieved after 5 h in the presence of H2O2 using TiO2/MWCNT/UVA-LED for real textile composite wastewater. This study revealed that TiO2/MWCNT has improved the photocatalytic activity when compared to that of bare TiO2 under similar conditions. UVA-LED could be an alternative light source for the replacement of the conventional UV light for the photocatalytic treatment of reactive dyes.
Źródło:
Environment Protection Engineering; 2019, 45, 2; 95-116
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Empirical cumulative distribution function of CO2 concentration increments as a descriptor of indoor air variability
Autorzy:
Szczurek, A.
Maciejewska, M.
Pietrucha, T.
Powiązania:
https://bibliotekanauki.pl/articles/208271.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
carbon dioxide
air quality
carbon
indoor air pollution
indoor air quality
indoor environment
dwutlenek węgla
jakość powietrza
węgiel
zanieczyszczenie powietrza w pomieszczeniach
jakość środowiska wewnętrznego
środowisko wewnętrzne
Opis:
Indoor air quality broadly refers to the environmental characteristics inside buildings and characterizes the physical, chemical and biological state of indoor air at some place and time. Usually it is characterized by physicochemical properties of indoor environment such as temperature, relative humidity, airflows and concentration of characteristic pollutants, e.g. carbon dioxide. They are highly variable in time. In the paper, changes of empirical cumulative distribution function (ECDF) of CO2 concentration were considered as a descriptor of indoor air variability. Using this measure, there may be performed the analysis of CO2 variation in a short as well as long term. The approach utilizes the idea of classification. A class of variation of CO2 concentration has its individual ECDF. It indicates a particular case of balance/imbalance between CO2 delivery and removal processes, including gas dispersion. The analysis is applicable for evaluating the stability of indoor environment and it may provide support for the diagnosis of the performance of the air exchange system. Exemplary results were provided for an open space office and a lecture theater.
Źródło:
Environment Protection Engineering; 2015, 41, 3; 173-187
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Valorisation of sewage sludge humic compounds in the aspect of its application in natural environment
Autorzy:
Jakubus, Monika
Bakinowska, Ewa
Tobiašová, Erika
Powiązania:
https://bibliotekanauki.pl/articles/2032936.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
sewage sludge valorisation
humic
TOC
total organic carbon
waloryzacja osadów ściekowych
humus
węgiel organiczny
Opis:
The valorization of sewage sludge (SS) has been presented originating from four wastewaters treated in wastewater treatment plants (WWTPs) located in the Wielkopolska province. In the SS samples collected in two successive years, the quantity and quality of humic substances (HSs), fulvic and humic acids (FAs, HAs), amounts of organic carbon (TOC), organic matter (OM), labile carbon (CL), and water extracted organic carbon (WEOC) were determined. It was investigated how the defined parameters depend on the size of the installation and select those which in a routine SS analysis facilitate rapid assessment of their quality and suitability for application in the natural environment. Regardless of WWTP size and the year of analysis, SS was characterized by a significant share of easily decomposable compounds such as FAs and WEOC. The statistical analysis showed significant usefulness of CL, FAs, and HAs in the evaluation of SS quality and usability.
Źródło:
Environment Protection Engineering; 2021, 47, 1; 67-83
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of CO and NOx concentrations from a 20 kW boiler for periodic and constant wood pellet supply
Autorzy:
Juszczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/207975.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
boiler retort
combustion
wood pellet
carbon monoxide
emissions
kocioł retortowy
pelet drzewny
tlenek węgla
emisja
Opis:
The impact of the fuel feeding mode (continuous or periodic with various stand-by/operation time ratios) on carbon monoxide (CO) and nitrogen oxides (NO, NOx) concentration values in the flue gas was analyzed for coniferous wood pellet firing. Experiments were performed using a 20 kW water boiler equipped with an under-fed (retort) wood pellet furnace located in a full scale heat station simulating real-life conditions. Impact of oxygen concentration and temperature in the combustion chamber on the concentrations of carbon monoxide and nitrogen oxide have been examined. It was concluded that the commonly used periodic fuel supply does not necessarily cause an important increase of the concentrations of carbon monoxide compared to those in the continuous fuel feeding mode. Continuous fuel supply can even imply higher concentrations of carbon monoxide when fuel and air streams are not chosen properly.
Źródło:
Environment Protection Engineering; 2016, 42, 3; 95-107
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon and nutrient removal from domestic wastewaters in a modified 5-stage Bardenpho process via fuzzy modeling approach
Autorzy:
Manav Demir, Neslihan
Yildirim, Asuman
Coskun, Tamer
Balcik Canbolat, Cigdem
Debik, Eyup
Powiązania:
https://bibliotekanauki.pl/articles/208121.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fuzzy logic
COD
carbon
Bardenpho process
municipal wastewaters
logika rozmyta
ChZT
węgiel
process Bardenpho
ścieki komunalne
Opis:
Gradual increase in the generation of wastewater results from the increasing global population. Thus, new treatment techniques and systems for controlling the treatment process depending on wastewater characteristics are desirable. This paper presents the use of a pilot-scale modified five-stage Bardenpho process with a 10 m3/day capacity for the treatment of real municipal wastewater. The process was developed for this study, and the steady-state removal efficiencies for COD (chemical oxygen demand), TKN (total Kjeldahl nitrogen), NH4+-N (ammonium nitrogen), PO43--P (phosphate phosphoms), SS (suspended solids), and VSS (volatile suspended solids) were 87±5%, 86±12%, 93±14%, 89±9%, 88±8%, 94±4%, and 94±4%, respectively. In the study, the effluent COD, TKN, and TP concentrations were also estimated using a fuzzy logic approach. The results showed that coefficients of determination are higher than 0.80 suggesting that the presented fuzzy logic approach may confidently be used for the estimation of the treatment performance.
Źródło:
Environment Protection Engineering; 2019, 45, 1; 5-16
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of selected organic compounds on modified activated carbons
Autorzy:
Okoniewska, E.
Lach, J.
Ociepa, E.
Stępniak, L.
Powiązania:
https://bibliotekanauki.pl/articles/207870.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
activated carbon
organic compounds
sorption
removal of organic compounds
węgiel aktywowany
związki organiczne
sorpcja
usuwanie związków organicznych
Opis:
The presented work attempted to modify activated carbons with ultrasonic field and evaluate the efficiency of sorption of organic compounds on the obtained modified activated carbons. The results showed that the applied procedure had a positive effect on the removal of the investigated substance. In the case of removal of benzoic and phthalic acids, the highest sorption capacities were obtained for activated carbons modified with ultrasonic waves with the amplitude of 100% and the exposure time of 5 min. The removal efficiency for both acids was approximately 80% at the initial pH and 65% at pH = 8.0. Sorption of imidazole on modified activated carbons showed that lower final concentration was obtained for activated carbons modified with ultrasounds at the amplitude of 100%. The time of exposure to ultrasounds did not have a significant effect on reducing final concentrations. The average removal degree was approximately 45%. Sorption of phenol showed that the average degree of removal was approximately 80% for the solution of the initial pH whereas for higher pH the average removal degree was close to 65%.
Źródło:
Environment Protection Engineering; 2013, 39, 2; 135-144
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination and evaluation of seasonal changes of DBPs after chlorination in networks using underground water. Muş, Turkey case
Autorzy:
Avşar, Edip
Sönmez, Mücahit
Kiliç, Adile
Powiązania:
https://bibliotekanauki.pl/articles/2171844.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
działanie rakotwórcze
węgiel organiczny
THM
HAN
chlorowanie wody
zmiany sezonowe
carcinogenicity
organic carbon
water chlorination
seasonal changes
Opis:
This study aimed to determine the seasonal change of the concentrations of trihalomethanes (THMs) and one of the newly emerging byproducts haloacetonitriles (HANs), the most abundant group of some disinfection by-products (DBPs) forming as a result of chlorination of drinking water supplied from 2 different reservoirs to the city centre of Muş for disinfection purposes and called chlorinated organic halogens. The quantitative determination of these compounds, some of which may have carcinogenic properties, and the evaluation of their possible effects on public health constitute the importance of the study. The results show that although there is not sufficient chlorination in both water networks and total organic carbon (TOC) values are low in underground water, the total THMs some-times exceed the 100 μg/dm3 value applied in Turkey and pose a risk. It was observed that the total HAN values remain below the 2 μg/dm3 concentration in both networks.
Źródło:
Environment Protection Engineering; 2022, 48, 4; 5--19
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of 2,4,6-trichlorophenol from aqueous solutions using agricultural waste as low-cost adsorbents
Autorzy:
Kuśmierek, K.
Świątkowski, A.
Dąbek, L.
Powiązania:
https://bibliotekanauki.pl/articles/207901.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
activated carbon
heavy metals
Langmuir isotherm
Freundlich models
węgiel aktywny
metale ciężkie
odpady rolnicze
izoterma Langmuira
Opis:
Agricultural waste products including sunflower seed hulls, pumpkin seed shells, walnut shells and peanut shells were used as low-cost adsorbents for the removal of 2,4,6-trichlorophenol (TCP) from aqueous solutions. The effects of adsorbent dosage, pH and ionic strength on the adsorption of TCP were investigated. The results showed that the adsorption of TCP was pH dependent and increased upon increasing the ionic strength of the solution. The adsorption kinetics was found to follow a pseudo-second order kinetics. The equilibrium adsorption data were fitted to the Langmuir, Freundlich and Sips isotherms and the best results were achieved with the Freundlich model. The desorption of TCP using deionized water, water/methanol mixture or 5% sodium hydroxide was also studied. The results suggest that the tested materials may be used as an effective adsorbents without any treatment or any other modification for removal of TCP from the aqueous medium.
Źródło:
Environment Protection Engineering; 2017, 43, 4; 149-163
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł

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