Photodegradation of 17α-Ethynylstradiol (EE2) on Nanostructured Material of Type WO<Subscript>3</Subscript>-SBA-15     

Antonio F. Soares Filho  João F. Cruz Filho  Maciel S. Lima  Laíse M. Carvalho  Lara K. R. Silva  Joseita S. Costa  Taisa C. M. Dantas  Geraldo E. LuzJr 《Water, air, and soil pollution》2018,229(8):268

The growing contamination from the use of endocrine deregulator (EDs) has made the scientific community come worrying, because of this, studies to eliminate these pollutants in the water resources have intensified. Among the processes used, ‘Advanced Oxidative Processes’ (AOP’s) stands out, by means of heterogeneous photocatalysis for the removal of these organic pollutants present in the environment. The paper’s main point is on the synthesis of photocatalysts WO₃-SBA-15 in the molar ratios Si/W (10, 25, 50, and 75) and the photocatalytic activity in the degradation process of 17α-ethynylstradiol (EE2), present in several water contaminants. The catalysts prepared were characterized by XRD, XRF, Raman, FTIR, UV-vis, adsorption, and desorption of nitrogen, and to determine the photocatalytic activity, frequency of turnover (TOF) was used. Through the characterizations, it can be observed that insertion of nanoparticles in WO₃ did not cause changes in the mesoporous structure of the SBA-15 and there is presence of monoclinic, triclinic, and orthorhombic phases of WO₃. The photocatalytic activity showed to be dependent on the calcination temperature and the molar ratio of the catalysts WO₃-SBA-15, being the sample WO₃-SBA-15(50) at 600 °C which presented the greatest degradation potential in the degradation of 17α-ethynylstradiol, with 98%, using ultraviolet radiation, for 4 h. Moreover, reuse of the catalyst did not show significant losses after 4 cycles, with 82% in EE2 degradation.  相似文献   

Snapshots Analyses for Turbidity Measurements in Water     

Antonio Cesar Godoy  Alberto Yoshihiro Nakano  David Antônio Brum Siepmann  Ricardo Schneider  Felipe Walter Dafico Pfrimer  Oscar Oliveira Santos 《Water, air, and soil pollution》2018,229(12):378

Turbidity has been used as an effective indicator of water quality and it is regulated by national control agencies as a water potability parameter. This work proposes a simple, low-cost, and easily reproducible method based on digitally processed snapshots of electromagnetic radiation beam through a scattering medium in order to measure turbidity. The formazin polymer was used as the standard reference in the experiments to prepare samples from 0.1 to 100 NTU for high turbidity range and from 0.02 to 10 FNU for low turbidity range. The device design is comprised of a webcam and an LED/laser as a light sensor and a radiation source, respectively. The captured scattered light snapshot can be decomposed digitally in color components values and correlated with the turbidity parameter. It is possible to obtain differently device performances changing the light sensor device configuration. The linear regression analyses have shown a distinct relationship among red, green, blue, and grayscale components and the turbidity. At high range, the green component present the best LOD and LOQ values 0.64 and 2.10, respectively, operating with an ordinary webcam and white LED. Nevertheless, the best device performances were obtained with dedicated Raspberry Pi camera modules and white LED for low range turbidity reaching LOD=0.027 and LOQ=0.087 FNU. The figures of merit show recovery between (97.50?101.95%), repeatability (2.11%), within-laboratory reproducibility (2.25%), and limits of quantification (0.087 FNU). The achieved performance device shows the effectiveness of digitally processed snapshots obtained with digital cameras for turbidity measurements.  相似文献   

The activation of the IFNβ induction/signaling pathway in porcine alveolar macrophages by porcine reproductive and respiratory syndrome virus is variable     

Christopher C. Overend  Junru Cui  Marvin J. Grubman  Antonio E. Garmendia 《Veterinary research communications》2017,41(1):15-22

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Response to the letter on “Climatic distribution of citrus black spot caused by <Emphasis Type="Italic">Phyllosticta citricarpa.</Emphasis> A historical analysis of disease spread in South Africa” by Fourie et al. (2017)     

Joaquín Martínez-Minaya  David Conesa  Antonio López-Quílez  Antonio Vicent 《European journal of plant pathology / European Foundation for Plant Pathology》2017,148(3):503-508

In a previous study, Martínez-Minaya et al. (European Journal of Plant Pathology 143, 69–83, 2015) performed an analysis of climate-based distribution of citrus black spot (CBS) in South Africa. It was found that CBS was initially confined to humid areas with summer rainfall, but later spread to arid steppe and even desert climates. A strong spatial autocorrelation of CBS distribution was found. Fourie et al. (European Journal of Plant Pathology, 2017) take a critical view of our study, but without presenting any analysis of results to refute our findings. Furthermore, Fourie et al. (European Journal of Plant Pathology, 2017) appear to have misunderstood our work, since many of their criticisms relate to the potential distribution of CBS in Europe, which is beyond the scope of our original study. Fourie et al. (European Journal of Plant Pathology, 2017) highlight the limitations of climate classifications in species distribution modelling. However, this was made explicit in our study, indicating that it was a preparatory work and further advanced modelling studies, including spatial effects, will be needed. Fourie et al. (European Journal of Plant Pathology, 2017) incorrectly assume that we used all of South Africa as the background in the spatial autocorrelation analysis. However, only citrus areas were used and a strong spatial autocorrelation was detected at all distances evaluated. Contrary to what Fourie et al. (European Journal of Plant Pathology, 2017) suggest, similar climate distributions of CBS were obtained at 5′ and 30′ resolution, and also with the national land-cover map of South Africa. The figure comparison presented by Fourie et al. (European Journal of Plant Pathology, 2017) appears to ignore the fact that the maps we used were grid cells of 10 × 10 km and not the line polygons they suggest. Therefore, we consider the conclusions from the Martínez-Minaya et al. (European Journal of Plant Pathology 143, 69–83, 2015) remain entirely valid.  相似文献   

Inheritance of resistance to Meloidogyne enterolobii in <Emphasis Type="Italic">Psidium guajava</Emphasis> x <Emphasis Type="Italic">P. guineense</Emphasis> hybrid     

Soniane Rodrigues da Costa  Carlos Antonio Fernandes Santos  Jose Mauro da Cunha e Castro 《European journal of plant pathology / European Foundation for Plant Pathology》2017,148(2):405-411

Inheritance of the resistance to nematodes has been studied on many different crops, however to our knowledge, no data are available for guava species. The basic genetic resistance parameters to Meloidogyne enterolobii are estimated in the current research in order to guide the development of genotypes resistant to the pathogen. The parental plants, F1 and F2 from a Psidium guajava x P. guineense cross were assessed for the presence or absence of galls and for the number of eggs and juveniles in the root system at the 120th and 240th days after inoculation with 10,000 eggs and juveniles of the nematode. At the age of nine years, the P. guineense plant remained without nematode attack symptoms, whereas the maternal plant was destroyed by the pathogen. The F1 generation showed 270 plants with reproduction factor (RF) <0.322, and there were tiny galls in only 16 plants. The segregation for the presence or absence of galls in the root system in generation F2 was 9:7, wherein the χ² values were 0.78 and 2.66, respectively, at the 120th and 240th days after inoculation, whereas the segregation for RF was 15:1, wherein the χ² values were 2.76 and 1.18, respectively, at the 120th and 240th days. These results indicate epistatic interaction between two genes: in RF < 1 only one allele sets the resistance to the pathogen. The broad sense heritability of RF, estimated to the two assessments was 0.97, and it also indicates a simple inheritance of resistance to M. enterolobii.  相似文献   

Inhibition of early development stages of rust fungi by the two fungal metabolites cyclopaldic acid and epi‐epoformin          下载免费PDF全文

Eleonora Barilli  Alessio Cimmino  Marco Masi  Marco Evidente  Diego Rubiales  Antonio Evidente 《Pest management science》2017,73(6):1161-1168

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Surface Reapplication of Lime and Gypsum on Maize Cultivated Sole and Intercropped with Urochloa     

J. W. Bossolani  E. Lazarini  F. L. Santos  I. R. Sanches  H. H. A. Meneghette  L. F. Parra 《Communications in Soil Science and Plant Analysis》2018,49(15):1855-1868

The aim of this experiment was to study the lime and gypsum reapplied on surface and their impacts on maize crop under the sole and intercropped systems. The experiment is being developed in a dystrophic Oxisol, since 2011, and arranged in a randomized blocks design, in split-split plots, with four replications. As treatments in the plots, the maize was installed in two cropping systems: sole and intercropped with Urochloa. For the subplots, we used four doses of lime (0, 2000, 4000, and 6000 kg ha^?1) and four doses of gypsum (0, 1500, 3000, and 4500 kg ha^?1) distributed at random in the sub-subplots. The combination of intermediate doses of lime and gypsum resulted in higher foliar Ca content. The grain yield increased with the combination of lime and gypsum. The maize when cultivated in intercropped system is more productive, with a point of maximum for dolomitic lime of 3031 kg ha^?1.  相似文献   

Changes in Hydrocarbon Composition and Autochthonous Microorganism Growth of Contaminated Mining Soil During Bioremediation     

Javier López-Miranda  Sergio Cisneros-de la Cueva  Jesús Bernardo Páez-Lerma  Juan Antonio Rojas-Contreras  Nicolás Oscar Soto-Cruz 《Water, air, and soil pollution》2018,229(5):165

The goal of this study was to evaluate the effect of high Tween 80 concentrations on hydrocarbon contaminants and hydrocarbonoclastic microorganisms present in contaminated mining soil during a bioremediation process. The independent variables included Tween 80 concentration and process time. The elected response variables included concentration of total petroleum hydrocarbons (TPH), the chemical composition of contaminants, viable microbial count, and CO₂ production. These were measured at various time points during the bioremediation process, which was conducted at room temperature. Higher removal of pollutants occurred at low Tween 80 concentrations. An analysis of the normalized variables shows that the rate of TPH degradation depended on microbial growth rate, which depended on Tween 80 concentration. The addition of Tween 80 changed the concentration and type of the residual hydrocarbon contaminants present, as well as the count and genus of the hydrocarbonoclastic microorganisms that grew during the bioremediation process. Higher concentrations of Tween 80 increased the levels of the chemical compounds present in the bioremediated soil while reducing the viable count and microbial diversity during the bioremediation process. Conversely, low Tween 80 concentrations produced only monoethylhexyl phthalate, which is not a petroleum hydrocarbon derivative. Overall, these results prove that the removal of TPH is dependent on the count and genus of active indigenous hydrocarbonoclastic microorganisms in soil, and these conditions may be controlled by modulating the concentration of Tween 80 that is applied.  相似文献   

Adoption and extent of adoption of georeferenced grid soil sampling technology by cotton producers in the southern US     

Eric Asare  Eduardo Segarra 《Precision Agriculture》2018,19(6):992-1010

This study investigates the producer/farm characteristics that influence the adoption and extent of adoption of georeferenced grid soil sampling technology, using the two-part model, among cotton producers in the southern U.S. The extent of adoption is the number of acres grid soil sampled. Soil sampling is sometimes seen as the foundation of precision agriculture. The study uses the 2013 survey data on active cotton producers in 14 southern U.S states conducted by Cotton Incorporated. The study identified producers’ awareness of a cost-share reimbursement program, percentage of income from cotton production, the use of yield map, ownership of livestock, land acreage devoted to other crops, and cotton production in Mississippi and Tennessee as important variables that influence the extent of adoption of georeferenced soil sampling technology.  相似文献   

Soil pollution by mining activities in Andalusia (South Spain)—the role of Mineralogy and Geochemistry in three case studies     

Antonio J. Romero-Baena  Isabel González  Emilio Galán 《Journal of Soils and Sediments》2018,18(6):2231-2247

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