https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45646 i.e., low (N1), middle (N2), and high (N3) N additions (10, 30, and 90 kg N hm^-2 a^-1, respectively) and an unfertilized control (CK; 0 kg N hm^-2 a^-1), were conducted in the desert grassland of Karamay, Xinjiang, in northwest China. Then, the amounts of 16 priority USEPA PAHs, the total amount of PAHs (∑PAHs), and three biotic-abiotic factors, including soil environmental factors, enzyme activities, and microbial functional diversity, were investigated to demonstrate the effects of N fertilization on PAHs degradation in the desert grassland. The results showed that, the amounts of ∑PAHs and 14 priority USEPA PAHs significantly decreased along the gradient of N addition (N2 ≤ N3 < N1 < CK)(P < 0.01), except for undetected acenaphthylene and acenaphthene, in all N additions treatments. This suggested N fertilization was advantageous to the decrease of soil PAHs in arid desert grassland. Low molecular weight PAHs/heavy molecular weight PAHs > 1.00, whereas 0.40 < fluoranthene/(fluoranthene+pyrene) < 0.50 in CK plots in both April and September, suggesting that PAHs mainly originated from a petroleum pollutant. ∑PAHs in the desert grassland soil equaled to (28.91±2.32) mg/kg in September in Karamay, indicating that the local soil had a heavy pollution level of PAHs. In most situations, the amounts of ∑PAHs and 14 priority USEPA PAHs had a significant regression relationship with soil organic matter, ammonium nitrogen, nitrate nitrogen, total nitrogen, available phosphorus, and urease activity in the generalized linear mixed models (GLMMs) (P < 0.05). The regression function of PAHs to biotic-abiotic factors varied among PAH types. Overall, our results showed that PAH degradation was a complex process in desert grassland soil, which was interactively determined by their own characteristics, plant roots, and microorganisms. N deposition might improve nutritional availability, with positive interactions with plant roots, microorganisms, and PAHs degradation, and the subsequent decrease in PAHs concentration along an N addition gradient.]]> Wed 02 Nov 2022 15:24:16 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43365 P = 0.1 adjusted odds ratio 0.54; 95% CI 0.23–1.26; P = 0.15. A total of 37 of 86 patients (43%) assigned to conservative oxygen and 46 of 78 (59%) assigned to usual oxygen had died by day 180; odds ratio 0.53; 95% CI 0.28–0.98; P = 0.04; adjusted odds ratio 0.56; 95% CI 0.25–1.23; P = 0.15. Cause-specific mortality was similar by treatment group. Conclusions: Conservative oxygen therapy was not associated with a statistically significant reduction in death or unfavourable neurological outcomes at day 180. The potential for important benefit or harm from conservative oxygen therapy in HIE patients is not excluded by these data.]]> Fri 16 Sep 2022 08:41:21 AEST ]]>