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Layered double hydroxides (LDHs) are 2D nano-sheets where different M2+ and M3+ metal cations are uniformly distributed in Mg(OH)2 brucite-like sheets and various charge-compensating anions (An-) are present in their interlayer spaces. This work includes preparation of different SiO2@Ni/Cr mixed-metal layered nano-oxide-type catalysts by the calcination of SiO2@Ni-Cr LDH nano-composite-based alcogel coated over a honeycomb monolithic substrate and their use as a catalytic device for the study of catalytic partial oxidation (CPO) of CH4 both in the presence of O2 and in the presence of N2O under atmospheric pressure at different temperatures not exceeding 500 °C to study the effect of N2O on the CPO of CH4. It was observed that in the presence of O2 the yield of syngas (H2 + CO) did not exceed 90% whereas in the presence of N2O about 99.9% syngas (H2 + CO) was observed. The selectivity towards syngas production reached a maximum value when an optimal reaction condition was maintained at 11 CH4N2O mol ratio with a temperature of 500 °C. XPS analysis showed that a NiO-type compound formed on the decomposition of the LDH component after H2 treatment was reduced to disperse Ni0, which acted as an active catalytic species. Graphical abstract Schematic representation of catalytic partial oxidation of CH4 in the presence of N2O by SiO2@Ni-Cr-LDH-based mixed-metal nano-oxide.Plutella xylostella L. is a cosmopolitan pest of wild and cultivated crucifer vegetables worldwide. It has developed resistance to almost all commercial chemicals, making them one of the most problematic field pests in China. The natural plant extracts and essential oils (EOs) could be a safe alternative for agricultural pests. The development and production of EOs decrease the negative effects of synthetic chemicals. In the present study, the fumigation activity of 8 pure monoterpenes against P. xylostella was evaluated. Results from fumigation tests revealed that 8 tested compounds exhibited various degrees of toxicity against adults of the diamondback moth. Cuminaldehyde was the most toxic compound based on the 12-h LC50 (0.17 mg/L) and 24-h LC50 (0.12 mg/L) values, respectively. Also for larvae and eggs, cuminaldehyde was the most toxic compound. The 12-h LC50 value for cuminaldehyde to 1st, 2nd, and 3rd instar larvae was 0.10 mg/L, 0.12 mg/L, and 0.55 mg/L, respectively. The 24-h LC50 value for the different instar larvae was 0.07 mg/L, 0.09 mg/L, and 0.35 mg/L, respectively. The 24-h LC50 value for eggs (endpoint hatching rate) was 1.95 mg/L for cuminaldehyde, followed by carvacrol and eugenol (2.05 mg/L and 2.31 mg/L, respectively). Cuminaldehyde was very friendly to the larvae and adults of Harmonia axyridis and did not cause any mortality. Our results indicated that cuminaldehyde had potential insecticidal activity against P. xylostella and could be utilized in the novel biological pesticide development.A novel ZnO-CeO2-rGO (ZCG) ternary nanocomposite with varying ZnO/CeO2 weight proportions was synthesized by a hydrothermal process for photoelectrochemical water splitting and photocatalytic application. XRD diffraction peaks of ZCG nanocomposites displayed the patterns of ZnO and CeO2 nanoparticles, and SEM revealed irregular flake-like particles, which were uniformly decorated on the rGO matrix. Increase in the intensity ratio of D and G bands from Raman spectra revealed changes in oxygen bonding in the ZnO-rGO (ZG) and ZCG nanocomposites. The shift in the band edge positions and the decrease in the band gap with increase in the cerium oxide content in ZCG composites were observed from UV-Vis and Mott-Schottky plots. XPS results showed that Ce3+ fraction increased with an increase in the cerium oxide content in ZCG nanocomposites. The ZCG3 (8515) nanocomposite exhibited decreased electron-hole recombination rate as evidenced from the photoluminescence and electrochemical impedance spectroscopy Nyquist plots. The characteristic frequency in Bode's plot shifted to a lower frequency for the ZCG3 electrode demonstrating low interfacial charge transfer resistance, and ZCG3 photoelectrode displayed a higher photocurrent density of 0.69 mA/cm2 at 1.5 V compared with other photoelectrode. The optimized and highly efficient ZCG3 nanocomposite exhibited improved photocatalytic degradation of methylene blue (MB) with a reaction rate constant of 0.0201 min-1. Combination of defects in the form of Ce3+ ion and surface oxygen vacancies coupled with rGO as the electron acceptor improved the charge carrier density and carrier transport in addition to the formation Schottky-type junction and the presence of an internal electric field.The removal of the harmful carcinogen arsenic from drinking water by a green technology is a major concern in the field of environmental engineering. The sorptive profile of arsenic remediation by calcined Mg-Fe-layered double hydroxide, fabricated by a one-pot synthesis technique, was investigated to delineate its applicability in real-life water. The physicochemical properties of adsorbent, as demonstrated from spectroscopy and microscopy, which described the existence of amorphous material with significant surface roughness possess selectivity towards arsenic. The isotherm and kinetic along with thermodynamic modeling exhibited the occurrence of spontaneous (ΔG0 value = - 8.084 kJ/mol to - 10.942 kJ/mol), endothermic (ΔH0 value = 12.135 kJ/mol), and physisorption reactions (Ead = 4.103-5.832 kJ/mol, Ea = 11.546 kJ/mol, S* = 0.0005  less then less then  1, and ΔHx = 9.23-16.29 kJ/mol) with high uptake rate and adsorption potential of adsorbent. The isotherm and kinetics were demonstrated by Temkin (R2 = 0.944-0.969) and Elovich (R2 = 0.996-0.998) models, respectively, with high statistical significance. The intraparticle diffusion model which established the rate-limiting step is the combination of both film and pore diffusions. The applicability of layered double hydroxide (LDH) material in the real-life water was confirmed by isotherm and kinetic modeling along with the regeneration/reuse potential. The adsorptive removal of arsenic by the LDH material exhibited to be a promising technique without creating any secondary hazard.In addition to the adverse effect of extreme weather and weather variation across the globe, the ecological deficit accounting associated with the USA is perceived to have further worsen the country's environmental quality. Considering the aforementioned motivation, this study examined the effects of cooling degree days, heating degree days and ecological footprint on environmental degradation in the USA over the period of 1960 to 2016. While employing the Autoregressive Distributed Lag (ARDL) and Bounds testing to cointegration approaches, the gross domestic product (GDP) per capita is further incorporated in the estimation model to avoid estimation bias thus enhancing a robust estimate. The result overwhelmingly found that the cooling degree days, the heating degree days and the ecological footprint accounting aggravates the country's environmental degradation. Worse still, the study further presents that there is short-run adverse impacts of the heating and cooling degree days, and the short-run and long-run ecological footprint on the country's environmental sustainability. Moreover, there is statistical evidence that the income growth in the USA especially in the long run will not also improve the environmental quality. Irrespective of the income-environmental degradation long-run relationship, the relieving impact of income growth on environmental degradation is observed in the short run. In general, the study presents relevant policy pathway for implementation.This study sets out to propose a new ensemble of probabilistic spatial modeling and multi-criteria decision-making comprised of stepwise areal constraining and Mahalanobis distance algorithms in order to assess areal suitability for landfilling. The Ardak watershed was selected as the study area due to encountering several cases of open garbage dumps and uncontrolled landfills which are one of the main sources of river water pollution in the upstream of the Ardak dam. The results revealed that the proposed algorithm successfully assists in inventory-irrespective probabilistic modeling of landfill siting which is mainly indebted to the role of areal constraining in providing training and validation samples for the Mahalanobis distance model. The latter also showed a robust pattern recognition results from which a discernible differentiation of the area was attained while the spatial dependencies between the environmental factors were taken into account. Mahalanobis distance also gave an outstanding performance in terms of goodness of fit (area under the success rate 89.367) and prediction power (area under the success rate 89.252). click here Based on a five-point scale classification scheme, about 2.7% and 2.6% of the study area, respectively, have high and very high suitability for landfilling, while the remaining area is shared between very low-to-moderate suitability classes. According to the current trail of literature regarding landfill site selection which mostly relies on mere areal filtering, a probabilistic model would give invaluable inferences regarding the pattern of suitability/susceptibility of the area of interest and causative role of the influential factors. Graphical Abstract.PURPOSE To evaluate the effect of mitomycin-C (MMC) on the success of external (Ex-DCR) or endoscopic dacryocystorhinostomy (En-DCR). METHOD A systematic review of randomized clinical trials of Ex- or En-DCR with and without the use of MMC to treat primary acquired nasolacrimal duct obstruction (NLDO) was done. Two authors independently searched six databases from 1990 to 2019, using the terms "dacryocystorhinostomy" and "mitomycin-C." Statistical and meta-analyses were performed using RevMan 5.3 software. RESULTS Twenty-seven studies involving 2158 surgeries were included in this systematic review. The Ex-DCR group comprised 14 studies [odds ratio (OR) 2.74; 95% confidence intervals (CI) 1.54-4.87; I2 = 30%], while the En-DCR group 13 studies (OR 1.69; 95% CI 1.21-2.37; I2 = 0%). The use of MMC slightly increased the success rate of Ex- or En-DCR (OR 2.1; 95% CI 1.52-2.9; I2 = 14%). CONCLUSION The intraoperative use of MMC is safe and slightly improves the success rate of Ex- or En-DCR. However, the evidence was very weak.PURPOSE The purpose of this study was to examine the longitudinal developmental patterns of mental health (i.e., physical, psychosocial, and executive functioning) and movement behaviors (i.e., sedentary behavior and moderate-to-vigorous physical activity [MVPA]) between Hispanic and non-Hispanic children. METHOD We tracked 153 children for 3 years from kindergarten (time 1) to third grade (time 2; 91 Hispanic; mean age = 5.36, SD = .48). Physical, psychosocial, and executive functioning was assessed using validated surveys, while school-based sedentary behavior and MVPA were assessed by accelerometers. RESULT A 2 × 2 (time × ethnicity) factorial repeated measures MANCOVA (gender and SES as covariates) revealed significant ethnicity effect (p = .05) and time by ethnicity interaction effect (p  .05) over time. CONCLUSION Ethnic disparities in mental health between Hispanic and non-Hispanic children exist but may reduce from early to middle childhood. The longitudinal changes relative to ethnicity highlight the need for tailored interventions to address health disparities in mental health and movement behaviors between Hispanic and non-Hispanic children.