排序方式： 共有28条查询结果，搜索用时 15 毫秒
21.
James G. Moberly Thomas Borch Rajesh K. Sani Nicolas F. Spycher S. Sevinc Şengör Timothy R. Ginn Brent M. Peyton 《Water, air, and soil pollution》2009,201(1-4):195-208
Nearly a century of mining activities upstream have contaminated Lake Coeur d’Alene and its tributaries with Pb, Zn, and other heavy metals. Heavy metal concentrations in sediments of the Coeur d’Alene watershed have been shown to be inversely proportional to the sediment size fraction; thus, analysis on a very small scale is essential to determine the mobility and stability of heavy metals in this environment. Micron-scale synchrotron-based methods were used to determine the association of heavy metals with solid phases in sediments of the Coeur d’Alene River. Bulk X-ray diffraction (XRD), extended X-ray absorption fine structure spectroscopy, and synchrotron-based microfocused XRD combined with microfocused X-ray fluorescence mapping indicate the presence of crystalline Pb- and Zn-bearing mineral phases of dundasite [Pb2Al4(CO3)4(OH)8·3H2O], coronadite [PbMn8O16], stolzite [PbWO4], mattheddleite [Pb10(SiO4)3.5(SO4)2Cl2], bindheimite [Pb2Sb2O7], and smithsonite [ZnCO3]. Likely phases for Zn and Pb adsorption were ferrihydrite, diaspore [AlO(OH)], manganite [Mn(III)O(OH)], muscovite [KAl2(Si3Al)O10(OH,F)2], biotite [K(Fe,Mg)3AlSi3O10(F,OH)2], and montmorillonite [Na0.3(Al,Mg)2Si4O10(OH)2·8H2O]. The large predominance of Fe and Mn (hydr)oxides over other sorbent minerals suggests that the metal sorption behavior is dominated by these (hydr)oxide phases. 相似文献
22.
Journal of Plant Diseases and Protection - Insecticidal, repellent and fumigant activities of Rosemary [Rosmarinus officinalis (Lamiaceae)], Daphne [Laurus nobilis (Lauraceae)], Echinacea... 相似文献
23.
Ferda Sevinc Mutlu Sevinc Ozlem Derinbay Ekici Ramazan Yildiz Nermin Isik Ugur Aydogdu 《Veterinary parasitology》2013,191(1-2):35-43
Ovine babesiosis, caused by Babesia ovis, is of major economic importance in Turkey. The changes in the blood profile of infected animals are informative about the course of infection. The aim of the present study was to evaluate the hematological and biochemical changes in the pre- and post-treatment periods of the natural B. ovis infections. The presence of the parasites was confirmed by microscopy and polymerase chain reaction (PCR) analysis. On the basis of the clinical and laboratory findings, the infections were categorized into different groups according to the degree of anemia and the level of parasitemia. All infected sheep were treated with imidocarb dipropionate (IMDP). The blood pictures in the pre- and post-treatment periods were compared.Pancytopenia occurred in animals with severe anemia and very high parasitemia, and bicytopenia in the other groups. The platelet count (PLT), plateletcrit (PCT) and mean platelet volume (MPV) returned to the normal ranges after treatment, except those in the group with severe anemia. In the biochemical profile, B. ovis infection caused an increase in blood urea nitrogen and total bilirubin, and these parameters returned to normal levels after treatment.The indirect fluorescein antibody test (IFAT) results showed that 38.1% of the cases raised specific antibodies during the period of infection, with titers ranging from 1/160 to 1/640. All of 45 animals re-examined after treatment were seropositive, with high titers that rose up to 1/5120. 相似文献
24.
Each year, wildland fires burn millions of hectares of forest worldwide. Fire managers need to provide effective methods for mapping fire fuels accurately. Fuel distribution is very important for predicting fire behavior. The overall aim of this project is to model fire behavior using FARSITE (Fire Area Simulator) and investigate differences in modeling outputs using fuel model maps, which differ in accuracy, in east Texas. This simulator model requires as input spatial data themes such as elevation, slope, aspect, surface fuel model, and canopy cover along with separate weather and wind data. Seven fuel models, including grass, brush, and timber models, are identified in the study area. To perform modeling sensitivity analysis, two different fuel model maps were used, one obtained by classifying a QuickBird image and the other obtained by classifying a LIDAR (LIght Detection and Ranging) and QuickBird fused data set. Our previous investigations showed that LIDAR improves the accuracy of fuel mapping by at least 13%. According to our new results, LIDAR-derived variables also provides more detailed information about characteristics of fire. This study will show the importance of using accurate maps of fuel models derived using new LIDAR remote sensing techniques. 相似文献
25.
Gerstein MB Lu ZJ Van Nostrand EL Cheng C Arshinoff BI Liu T Yip KY Robilotto R Rechtsteiner A Ikegami K Alves P Chateigner A Perry M Morris M Auerbach RK Feng X Leng J Vielle A Niu W Rhrissorrakrai K Agarwal A Alexander RP Barber G Brdlik CM Brennan J Brouillet JJ Carr A Cheung MS Clawson H Contrino S Dannenberg LO Dernburg AF Desai A Dick L Dosé AC Du J Egelhofer T Ercan S Euskirchen G Ewing B Feingold EA Gassmann R Good PJ Green P Gullier F Gutwein M Guyer MS Habegger L Han T Henikoff JG 《Science (New York, N.Y.)》2010,330(6012):1775-1787
26.
Basoglu A Sen I Sevinc M Simsek A 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(2):238-241
This study was performed to determine the concentrations of tumor necrosis factor (TNF) in the serum of neonatal calves with presumed sepsis and determine the correlation between serum concentrations of TNF and the severity and outcome of disease. Thirty-five sick calves < 30 days old that suffered from enteritis, respiratory disease, or both were considered suitable for inclusion in this study by satisfying clinical and laboratory criteria suggestive of septicemia. At admission, blood samples were collected from all calves to determine the prevalence of high concentrations of TNF. The clinical course and outcome of disease then were recorded. Of the 35 calves with presumed sepsis, 10 had high serum TNF concentrations. Scleral injection, weak or absent suckling reflex, sternal or lateral recumbency, unresponsive or comatose state, and death rate of calves with high serum TNF concentration were greater than those values for calves without high serum TNF concentration. Calves with high serum TNF concentration had significantly lower mean IgG (P < .001), globulin (P < .0001), and calcium (P < .0001) concentrations; greater serum creatinine concentrations (P < .0001); and > or = 2+ toxic changes in neutrophils than did calves without high serum TNF concentrations. Mean values for packed cell volume, band neutrophil count, and venous Pco2 were significantly (P < .007) higher in the group of calves with high serum TNF concentration. Results of this study indicate that serum TNF concentration is correlated with clinical criteria of sepsis in neonatal calves. A close association was apparent between disease severity and serum TNF concentrations in this group of calves with presumed septicemia. 相似文献
27.
Common bacterial blight (CBB) caused by Xanthomonas campestris pv. phaseoli reduces common bean (Phaseolus vulgaris L.) yield and quality worldwide. Genetic resistance provides effective disease control; however. a high level of resistance is difficult to attain and does not exist in pinto bean, the most important dry bean market class in North America. Our objective was to determine if a backcross breeding approach with the aid of molecular markers linked to quantitative trait loci (QTL) for resistance to CBB in a donor parent could be used to attain higher levels of resistance to CBB in pinto bean. QTL conditioning CBB resistance from the donor parent XAN 159 were introgressed into the recurrent parent‘Chase’using classical backcross breeding and intermittent marker‐assisted selection.‘Chase’pinto bean is moderately resistant and the breeding line XAN 159 is highly resistant to Xanthomonas campestris. Marker assays confirmed the presence of independent QTL from GN no. 1 Sel 27 and XAN 159 in advanced backcross‐derived pinto bean lines with improved CBB resistance. Agronomic characteristics of‘Chase’were fully recovered in the backcross‐derived lines. An important QTL for CBB resistance from XAN 159 on linkage group B6 was not introgressed because tight linkage between this QTL and the dominant V allele that causes an unacceptable black‐mottled seed coat colour pattern in pinto bean could not be broken. 相似文献
28.
Suzanne Higgins Saskia D. Keesstra Žydrė Kadziuliene Lionel Jordan-Meille David Wall Alessandra Trinchera Heide Spiegel Taru Sandén Andreas Baumgarten Johannes L. Jensen Juliane Hirte Frank Liebisch Susanne Klages Philipp Löw Katrin Kuka Maarten De Boever Karoline D'Haene Sevinc Madenoglu Hesna Özcan Wieke Vervuurt Janjo de Haan Willem van Geel Bo Stenberg Pascal Denoroy Rok Mihelič Alar Astover Raquel Mano Cristina Sempiterno Fatima Calouro Giuseppe Valboa Helena Aronsson Tore Krogstad Stanislav Torma Jose Gabriel Peter Laszlo Nils Borchard Bartosz Adamczyk Anna Jacobs Beata Jurga Bożena Smreczak Bruno Huyghebaert Morgan Abras Raimonds Kasparinskis Eloise Mason Claire Chenu 《European Journal of Soil Science》2023,74(5):e13422
The European Commission has set targets for a reduction in nutrient losses by at least 50% and a reduction in fertiliser use by at least 20% by 2030 while ensuring no deterioration in soil fertility. Within the mandate of the European Joint Programme EJP Soil ‘Towards climate-smart sustainable management of agricultural soils’, the objective of this study was to assess current fertilisation practices across Europe and discuss the potential for harmonisation of fertilisation methodologies as a strategy to reduce nutrient loss and overall fertiliser use. A stocktake study of current methods of delivering fertilisation advice took place across 23 European countries. The stocktake was in the form of a questionnaire, comprising 46 questions. Information was gathered on a large range of factors, including soil analysis methods, along with soil, crop and climatic factors taken into consideration within fertilisation calculations. The questionnaire was completed by experts, who are involved in compiling fertilisation recommendations within their country. Substantial differences exist in the content, format and delivery of fertilisation guidelines across Europe. The barriers, constraints and potential benefits of a harmonised approach to fertilisation across Europe are discussed. The general consensus from all participating countries was that harmonisation of fertilisation guidelines should be increased, but it was unclear in what format this could be achieved. Shared learning in the delivery and format of fertilisation guidelines and mechanisms to adhere to environmental legislation were viewed as being beneficial. However, it would be very difficult, if not impossible, to harmonise all soil test data and fertilisation methodologies at EU level due to diverse soil types and agro-ecosystem influences. Nevertheless, increased future collaboration, especially between neighbouring countries within the same environmental zone, was seen as potentially very beneficial. This study is unique in providing current detail on fertilisation practices across European countries in a side-by-side comparison. The gathered data can provide a baseline for the development of scientifically based EU policy targets for nutrient loss and soil fertility evaluation. 相似文献