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RESULTS Urinary total arsenic varied from 0.60 to 303.29 μg/L. A significant positive association was found between % monomethylarsonic acid (%MMA) and HR + BC one percent increase resulted in OR%MMA continuous = 2.73, 95% CI 1.48, 5.05), and this association remained even when %iAs or % dimethylarsinic acid (%DMA) were added to the models with %MMA. MMA/iAs was positively associated with HR + BC (ORMMA/iAs continuous = 2.03, 95% CI 1.33-3.10). A significant negative association was observed between DMA/MMA and HR + BC (ORDMA/MMA continuous = 0.43, 95% CI 0.26, 0.71). MMA/iAs was positively associated with TN BC (OR MMA/iAs continuous = 4.05; 95% CI 1.63, 10.04). CONCLUSION Altered iAs methylation capacity resulting in higher %MMA was associated with HR+ and TN BC but not with HER2+. MMA is the iAs metabolite more likely to be related to BC. Further research is needed to confirm these results and elucidate the underlying biological mechanisms. This paper considers a two-echelon supply chain with a supplier and a retailer both having capital constraints. The capital-constrained retailer first applies for loans from the commercial bank, and then applies for trade credit from the supplier. Compared with the single trade credit financing mechanism, what are the similarities and differences in the contagion and evolution of the associated credit risk in the supply chain when the retailer adopts both trade credit and bank credit (dual-channel financing) mechanism. Based on Stackelberg game analysis framework of the supplier and retailer, this paper clarifies the contagion mechanism of the associated credit risk in the supply chain and discusses the influences of financing structure, financing channel and financing costs on the contagion effect of the associated credit risk in the supply chain under dual-channel financing mechanism. Combined with the case simulation analysis, it is found that Compared with the single trade credit financing mechanism, the contagion effect is weaker under the dual-channel financing mechanism. The financing structure significantly affects the contagion effect, which increases with the increase of the proportion of trade credit financing. Both bank credit and trade credit financing costs can positively affect the contagion effect. Our research can enrich the existing credit risk management and supply chain finance literature and provide decision support for the selection of financing methods and risk control of commercial banks and supply chain enterprises. 5-Hydroxymethylfurfural (HMF) as value-added platform chemical can be derived from biomass. This study used microwave hydrothermal liquefaction (MHTL) to obtain HMF from sugarcane bagasse in acidic seawater conditions. The key processing parameters including temperature, reaction time, and liquid-to-solid ratio (L/S) were evaluated and optimized. The highest HMF yield of 8.1 wt% was obtained at 149 °C with a reaction time of 4 min and a L/S value of 121, respectively. This yield is considerable and even higher than the yield derived from sugarcane molasses under similar microwave conditions in the absence of seawater. Hence, acidic seawater was found to promote the hydrolysis of sugarcane bagasse to give HMF precursor (i.e. fructose and glucose), while simultaneously inhibiting the conversion of HMF to levulinic acid under MHTL conditions, possibly explaining the high HMF yield. This method presents a new and sustainable means of transforming waste biomass to valuable substances using seawater or brine wastewater. Petroleum is an important industrial raw material that enters the soil during production and use and is harmful to soil organisms. Barasertib To evaluate the toxicity of petroleum-contaminated soil, earthworms (Eisenia fetida) were used as model organisms for soil ecotoxicity studies. We found that earthworm weight and cocoon production decreased significantly after exposure to petroleum-contaminated soil. In addition, soil contaminated with high concentrations of petroleum can cause damage to the DNA within earthworm seminal vesicles. Superoxide dismutase (SOD), catalase, and peroxidase activities were significantly inhibited when earthworms were exposed to petroleum-contaminated soil, indicating that oxidative stress was induced by petroleum pollutants. The mRNA levels of annetocin precursor, a reproduction-related gene, was significantly inhibited after petroleum exposure. The mRNA levels of translationally controlled tumour protein (TCTP) and SOD exhibited a concentration-dependent relationship, and their relative expression increased with petroleum concentration. The rotating-frame spin relaxation rate constant, R1ρ, is a powerful probe of macromolecular chemical and conformational dynamics in relaxation dispersion, CEST, and DEST NMR experiments. The R1ρ relaxation rate constant is given by the absolute value of the largest (least negative) eigenvalue of the Bloch-McConnell evolution matrix; however, estimation of this eigenvalue require inversion of 3 N × 3 N dimensional matrices, in which N is the number of interconverting sites or states for a given nuclear spin in a molecule. The Schur complement is used to reduce the problem of calculating the characteristic polynomial of a 3 N × 3 N matrix to that of calculating the characteristic polynomial of a 3 × 3 matrix. The resulting expressions for N-site chemical exchange are more numerically tractable, because the largest matrix inversion also is of dimension 3 × 3. In addition, the simplifications offered by the Schurr complement conveniently illustrate the effects of fast or slow kinetic steps within an N-site kinetic topology. OBJECTIVE To explore the lived experiences of preparing for childbirth for nulliparous women aged 35-44 and determine how mature first-time mothers' can be better supported regarding childbirth preparation. DESIGN The research study comprised a cross-sectional qualitative design utilising Interpretative Phenomenological Analysis to provide a deep exploration into the experience of mature age women. SETTING Participants resided in South Australia and Victoria, Australia, in regional, suburban and inner-city locations. PARTICIPANTS Fourteen nulliparous women aged 35-44 were recruited in their third trimester of pregnancy using purposeful sampling. METHOD Data were collected by conducting in-depth semi-structured interviews during 28-36 weeks of pregnancy. Data were transcribed and analysed using Interpretative Phenomenological Analysis to identify themes of mature first-time mothers' preparations for childbirth. FINDINGS The super ordinate theme "Building confidence for childbirth" describes mature first-time mothers' experience of preparing for childbirth.
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