S'appuyant sur la notion de théorie voyageuse d'Edward Saïd pour proposer celle des théories féministes voyageuses, Montanaro accorde une importance primaire à la circulation des idées à l'échelle ...transnationale, ainsi qu'à la traduction politique et aux glissements conceptuels de ces dernières lors de leurs déplacements au sein de la cartographie globale des féminismes. (33) Un mouvement intersectionnel et transversal, donc, qui puise sa force et son amplitude dans la condition de précarité partagée par les corps impliqués dans sa mise en œuvre. Le féminisme marxiste et sa revendication d'un salaire pour le travail ménager ont rendu visible la sphère de la reproduction, c'est-à-dire l'ensemble des activités qui permettent de maintenir la vie, dans la mécanique de l'accumulation capitaliste, tout en démontrant la dépendance de cette dernière envers le travail reproductif, par ailleurs non socialement reconnu, impayé (ou sous-payé), et caractérisé par sa féminisation.
The downfall of the Turkish national currency is a process that has been going since August 2016. The reasons for the devaluation of the Turkish lira are the growing of the current account deficit, ...the accumulation of foreign debt as well as the authoritarian rule of the president Regep Paiyp Erdogan. Despite this, it is evident that the sudden downfall has political rather than economic reasons and it is influenced by the positions of the two leaders – Donald Trump and Regep Erdogan.
A multichannel OSL fiber optic dosimeter based on optically stimulated luminescence (OSL) of alumina is proposed for online in vivo dosimetry (IVD) in radiation therapy (RT). Two types of ...dosimetric-grade hbox Al 2 hbox O 3 : hbox C crystals are compared and show different behavior according to manufacturing process. Metrological validations have been performed with a Saturne 43 LINAC in reference conditions at CEA LIST LNHB (French Ionizing Radiation Reference Laboratory). The dose response of OSL integrals under photon beam irradiation (6, 12, and 20 MV) show sublinearity behavior modeled by second-order equations and exhibit a small energy dependence (between 0.7% and 1.4%), explained by a modified intermediate cavity model adapted to a LINAC photon spectrum. Preclinical tests at Institut Gustave Roussy (IGR) prove that a proper design for a PMMA build-up cap leads to a low dependence vs photon beam orientation ( +/- 1.5% and +/- 0.9%) and vs field size in view of surface measurements.
Display omitted
•Salinity affects the nitrogen and sulfur conversion performance of DSSADN process.•The highest production rates of nitrite and S0 were observed at 2.5% salinity.•The production rate ...of nitrite and S0 decreased gradually with salinity higher than 3%.•The species of sulfur-oxidizing bacteria were more abundant in high salt environment.
Double short-cut sulfur autotrophic denitrification (DSSADN) coupled with Anammox is of great significance in the low-carbon treatment of nitrogen-containing wastewater. In order to achieve high salinity autotrophic nitrogen removal, the effects of different salinities on the accumulation characteristics of NO2−-N and S0 and microorganisms in DSSADN process were studied. The results showed that the effect of salinity on the DSSADN process could be categorized into the stimulation, stable, and inhibition. When the salinity gradually increased to 2.5 %, the highest NO2−-N production rate (NiPR) and S0 production rate (S0PR) of DSSADN were 0.54 kg/(m3·d) and 1.1 kg/(m3·d) respectively. NiPR and S0PR gradually decreased as the salinity increased to more than 3 %. However, salinity had a relatively low impact on nitrite accumulation efficiency and S0 accumulation efficiency, which were 80 % and 81.5 %, respectively, when the salinity reached 5 %. Salinity has a great influence on the structure and abundance of microbial communities in the system.
Abstract The co-occurrence of freezing rain, ice accumulation and wind gusts (FZG) poses a significant hazard to infrastructure and transportation. However, quantification of the frequency and ...intensity of FZG is challenged by the lack of direct icing measurements. In this work, we evaluate and then apply an energy balance model to high-frequency data collected during 2005–2022 to derive hourly ice accumulation at 883 stations across the contiguous USA. These estimates are combined with wind gust observations to compute time series of hourly FZG hazard magnitude using the Sperry–Piltz Ice Accumulation (SPIA) index. Results are evaluated using Storm Reports of damage and economic disruption. The hourly SPIA estimates are also used to (i) derive a geospatial atlas of the hazard including the 50 yr return period event intensities for each US state derived using superstations, and (ii) describe storylines of significant events in terms of meteorological drivers and socioeconomic impacts. The highest values of SPIA during the 18 yr study period occur in a region extending from the Southern Great Plains over the Midwest into the densely populated Northeast. States in these regions also have high 50 yr return period maximum radial ice accumulation of 3–5 cm and co-occurring wind gusts >30 ms −1 . These values are comparable to past estimates for the 500 yr event which may imply this hazard has been previously underestimated. This atlas can be used to inform optimal FZG hazard mitigation strategies for each state/region.
Penthiopyrad (PEN) is a novel fungicide as succinate dehydrogenase inhibitor (SDHI) with chiral characteristics, and it is crucial to investigate its enantioselective residue behavior given its ...extensive application. This study aimed to comprehensively evaluated the storage stability, deposition, dissipation, accumulation, and dietary risk associated with PEN enantiomers and its metabolite 1-methyl-3-trifluoromethyl-1 H-pyrazole-4-carboxamide (PAM) in apple and strawberry. Two enantiomers of PEN accumulated primarily on leaves after spraying, whose concentrations were much higher than those observed in the apple and strawberry fruits, respectively. S-(+)-PEN was found to be preferentially degraded in apples (EF: 0.5113–0.5925), resulting in a relative enrichment of its antipode. Multiple sprays of PEN led to the accumulation of both of its enantiomers, with average residue accumulation value (RAaverage) of 1:2.06:1.11 for the R-(−)-PEN and 1:2.06:1.09 for the S-(+)-PEN in strawberries, respectively. The terminal residues of PAM were lower than the limit of quantification (LOQ), and that of total PEN in both fruits were below the maximum residue limit (MRL) established by China. Furthermore, the acute risk quotient (RQa) of target pesticide in apples were 0.821 %–2.105 %. The investigation provided a theoretical foundation and scientific guidance for applying PEN at the enantiomeric level in fruits.
Display omitted
•The penthiopyrad (PEN) enantiomers are mainly distributed on leaves 2 h after foliar spraying.•PEN exhibits enantioselective degradation in apples with S-(+)-PEN preferential degradation.•Repeated spraying of PEN could lead to residual accumulation in strawberries.•The acute dietary exposure risk quotient of PEN in apples was comparably acceptable.
Sulfidogenic treatment of sulfate (2-10g/L) and zinc (65-677mg/L) containing simulated wastewater was studied in a mesophilic (35 super(o)C) CSTR. Ethanol was supplemented (COD/sulfate=0.67) as ...carbon and energy source for sulfate-reducing bacteria (SRB). The robustness of the system was studied by increasing Zn, COD and sulfate loadings. Sulfate removal efficiency, which was 70% at 2g/L feed sulfate concentration, steadily decreased with increasing feed sulfate concentration and reached 40% at 10g/L. Over 99% Zn removal was attained due to the formation of zinc-sulfide precipitate. COD removal efficiency at 2g/L feed sulfate concentration was over 94%, whereas, it steadily decreased due to the accumulation of acetate at higher loadings. Alkalinity produced from acetate oxidation increased wastewater pH remarkably when feed sulfate concentration was 5g/L or lower. Electron flow from carbon oxidation to sulfate reduction averaged 83+/-13%. The rest of the electrons were most likely coupled with fermentative reactions as the amount of methane production was insignificant. The developed ANN model was very successful as an excellent to reasonable match was obtained between the measured and the predicted concentrations of sulfate (R=0.998), COD (R=0.993), acetate (R=0.976) and zinc (R=0.827) in the CSTR effluent.
PAH are particularly monitored because of their carcinogenic properties and their ubiquity in the environment. Their presence in municipal sewage sludge is a major problem due to the environmental ...risks associated with the sludge spreading on agricultural soils. The objective of this work was to asses the removal of PAH naturally present in sludge by continuous anaerobic digestion with recirculation of ozonated sludge. Recirculation of ozonated digested sludge allowed to enhance PAH removals, the highest efficiency was obtained with the highest ozone dose (0.11gO sub(3) /g sub(T) sub(S)). In order to study the effect of recirculation, a reactor was operated without recirculation but was fed with a mixture of raw and ozonated digested sludge. This process led to the best performances in terms of PAH and solid removals. This pointed out some accumulation of nonbiodegradable or recalcitrant compounds during recirculation assay. Smallest and most soluble compounds presented the highest biodegradation efficiencies.
Biological ammoniacal-nitrogen (NH sub(4) super(+)-N) and organic carbon (TOC) treatment was investigated in replicated mesoscale attached microbial film trickling filters, treating strong and weak ...strength landfill leachates in batch mode at temperatures of 3, 10, 15 and 30 super(o)C. Comparing leachates, rates of NH sub(4) super(+)-N reduction (0.126-0.159 g m super(-) super(2) d super(-) super(1)) were predominantly unaffected by leachate characteristics; there were significant differences in TOC rates (0.072-0.194 g m super(-) super(2) d super(-) super(1)) but no trend relating to leachate strength. Rates of total oxidised nitrogen (TON) accumulation (0.012-0.144 g m super(-) super(2) d super(-) super(1)) were slower for strong leachates. Comparing temperatures, treatment rates varied between 0.029-0.319 g NH sub(4) super(+)-N m super(-) super(2) d super(-) super(1) and 0.033-0.251 g C m super(-) super(2) d super(-) super(1) generally increasing with rising temperatures; rates at 3 super(o)C were 9 and 13% of those at 30 super(o)C for NH sub(4) super(+)-N and TOC respectively. For the weak leachates (NH sub(4) super(+)-N<140 mg l super(-) super(1)) complete oxidation of NH sub(4) super(+)-N was achieved. For the strong leachates (NH sub(4) super(+)-N 883-1150 mg l super(-) super(1)) a biphasic treatment response resulted in NH sub(4) super(+)-N removal efficiencies of between 68 and 88% and for one leachate no direct transformation of NH sub(4) super(+)-N to TON in bulk leachate. The temporal decoupling of NH sub(4) super(+)-N oxidation and TON accumulation in this leachate could not be fully explained by denitrification, volatilisation or anammox, suggesting temporary storage of N within the treatment system. This study demonstrates that passive aeration trickling filters can treat well-buffered high NH sub(4) super(+)-N strength landfill leachates under a range of temperatures and that leachate strength has no effect on initial NH sub(4) super(+)-N treatment rates. Whether this approach is a practicable option depends on a range of site specific factors.
PDF
