International congress of entomology     

Anderson JR  Doyen JT  Hoy MA  Koehler C  Pipa RL  Andres LA  Haverty MI  Hoy JB  Knop NF  Ehrlich PR  Greenstone M  Plapp FW  Shuping Y 《Science (New York, N.Y.)》1990,250(4979):360

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Biological control of bacterial wilt of potatoes caused byPseudomonas solanacearum     

Luigi Ciampi-Panno Ph.D.  Carmen Fernandez M.Sc  Pedro Bustamante  Nancy Andrade  Susana Ojeda  Andres Contreras 《American Journal of Potato Research》1989,66(5):315-332

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Copper,Chromium, Nickel,Lead and Zinc Levels and Pollution Degree in Firing Range Soils     

Andres Rodríguez‐Seijo  Maria C. Alfaya  María Luisa Andrade  Flora A. Vega 《Land Degradation \u0026amp; Development》2016,27(7):1721-1730

Small‐arms firing ranges are an important source of metal contaminants in the ecosystems located near these facilities, owing to the constant fall and alteration of the ammunition remnants on the soil, particularly in nearby berms. The objectives of this study were to analyse the pollution of chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) in rifle/pistol shooting range soils, to estimate their availability and to evaluate the influence of the ammunition used. The concentrations of Pb, Zn, Cu, Cr and Ni range from 55 to 6·309, 34 to 264, 19 to 98, 40 to 79 and 11 to 33 mg kg⁻¹, respectively. The moderate acidity and organic matter content favour the availability of Pb, followed by Cu > Zn > Ni > Cr. The values of different contamination indexes (I_geo, pollution index and integrated pollution index) suggest that Pb soil contamination is moderate to heavy, especially in the berm area and moderate for Cu and Zn. Lead ammunition is the main source of pollution, but another one was identified owing to the concentrations of Fe, Cr and Ni detected. Further studies are needed to verify their long‐term potential adverse effects. Copyright © 2016 John Wiley & Sons, Ltd.  相似文献   

Vegetative propagation of Colutea arborescens L., a multipurpose leguminous shrub of semiarid climates     

E. F. de Andres  J. Alegre  J. L. Tenorio  M. Manzanares  F. J. Sanchez  L. Ayerbe 《Agroforestry Systems》1999,46(2):113-121

The vegetative propagation of the multipurpose leguminous shrub Colutea arborescens from leafless hardwood cuttings was examined. Specific attention was paid to the factors: 1) cutting origin (apical, medial or basal); 2) indole-3-butyric acid (IBA) treatment (0, 50 or 200 ppm); and 3) relative humidity of the propagation environment (high or low humidity). After 120 days, 67.6% of the C. arborescens cuttings had rooted. The rooting ability of the cuttings was significantly influenced by the cutting origin and hormonal treatment. No effects on rooting percentage were shown by the relative humidity of the propagation environment. The best rooting response (95%) was shown by basal cuttings treated with 200 ppm IBA. Cutting origin, IBA treatment and relative humidity were significantly related to the root number, longest root length and the fresh/dry biomass of roots and leaves. Under conditions of high humidity, basal cuttings treated with 200 ppm IBA gave rise to the most highly developed plants. The positive relationship between sprouting and rooting suggests that successful propagation is related to the shoot formation potential of the cutting's food reserves. These findings were used to propose an efficient method for the vegetative propagation of C. arborescens plants. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

Characterization of the temporal and spatial distribution and reproductive ratio of vesicular stomatitis outbreaks in Mexico in 2008     

Arroyo M  Perez AM  Rodriguez LL 《American journal of veterinary research》2011,72(2):233-238

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GEOVET 2010A Conference on the Application of Spatial Analytical Methods Used in Animal Health, GEOVET - 2010 Sydney, Australia. Preface     

Ward MP  Perez AM 《Preventive veterinary medicine》2011,102(3):165-166

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The association between excess weight and self-rated health and psychological distress in women in Spain     

Martín-López R  Pérez-Farinós N  Hernández-Barrera V  de Andres AL  Carrasco-Garrido P  Jiménez-García R 《Public health nutrition》2011,14(7):1259-1265

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Storm legacies shaping post-windthrow forest regeneration: learnings from spatial indices in unmanaged Norway spruce stands     

Bāders  Endijs  Jõgiste  Kalev  Elferts  Didzis  Vodde  Floortje  Kiviste  Andres  Luguza  Solveiga  Jansons  Āris 《European Journal of Forest Research》2021,140(4):819-833

The anticipated increase in extreme disturbance events due to climate change is likely to expose Norway spruce (Picea abies (L.) Karst.) dominated forests in northern Europe to new conditions. Empirical data on the resilience of such natural (unmanaged) forests to disturbance and the long-term patterns of regeneration in its aftermath are currently scarce. We performed a quantitative assessment of natural forest stands in north–western Latvia to identify and characterise the patterns of stand structure 44 years after a stand-replacing disturbance and investigated the effects of legacies on regeneration. The spatial distribution of tree species and their dimensions were assessed in 71 circular sample plots (500 m² each) in natural forest areas, where Norway spruce dominated prior to the windthrow and salvage logging was not carried out. Spatial indices (species mingling index, size differentiation index, and aggregation index) were used to characterise stand structure and diversity. The different initial states (age and coverage of surviving trees) of stands affected eventual tree species dominance, size differentiation, degree of mingling and aggregation. Our results demonstrate a close relationship between disturbance legacies and spatial indices. The pre-storm understory and canopy survivors decreased species mingling, whereas survivors increased size differentiation. The size differentiation increased also with a higher degree of species mingling. Leaving differential post-storm legacies untouched promotes a higher structural and species diversity and therefore supports the management approach of preserving canopy survivors.

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Tissue distribution of Leishmania chagasi and lesions in transplacentally infected fetuses from symptomatic and asymptomatic naturally infected bitches     

Kristel Kegler Pangrazio  Erica A. Costa  Shyrley P. Amarilla  Ada G. Cino  Teane M.A. Silva  Tatiane A. Paixo  Luciana F. Costa  Enrique G. Dengues  Andres Avalos Ruiz Diaz  Renato L. Santos 《Veterinary parasitology》2009,165(3-4):327-331

Visceral leishmaniasis (VL) is primarily transmitted by an invertebrate vector, but transmission in the absence of the vector has been reported. Vertical transmission of VL has been described in man and dogs. The aim of this study was to evaluate the distribution of Leishmania amastigotes in fetal organs and histopathologic changes associated with parasitism and to determinate the frequency of transplacental transmission and potential of vertical transmission by symptomatic and asymptomatic pregnant bitches. Symptomatic (n = 4) and asymptomatic (n = 4) pregnant bitches, serologically and parasitologically positive for Leishmania sp., carrying a total of 53 fetuses (26 from symptomatic and 27 from asymptomatic bitches) were selected at the Veterinary Hospital of the National University of Asuncion, Paraguay. Samples of placenta and fetal organs such as liver, spleen, lymph nodes, bone marrow, kidney and heart were histologically evaluated and processed for immunodetection of amastigotes and PCR. There were no lesions compatible with VL in fetal tissues in spite of the presence of amastigotes, particularly in lymphoreticular tissues. However, fetal hepatocytes had marked degenerative changes that were independent of the presence of amastigotes in liver. Twenty-six out of 53 placentas (13 symptomatic and 13 asymptomatic) and a total of 17 fetuses out of 53 (nine symptomatic and eight asymptomatic) were PCR positive. Together these findings indicate a high frequency of transplacental transmission and no differences in the potential of transmission when symptomatic were compared to asymptomatic pregnant bitches.  相似文献   

Use of the scan statistic on disaggregated province-based data: foot-and-mouth disease in Iran   总被引：1，自引：0，他引：1  

Perez AM  Thurmond MC  Grant PW  Carpenter TE 《Preventive veterinary medicine》2005,71(3-4):197-207

The spatial scan statistic was applied to density-smoothed data that approximated the spatial distribution within the area and reduced the potential bias produced when location data have been aggregated for large areas. The method is illustrated, using data on the location of foot-and-mouth disease (FMD) outbreaks in Iran. Data examined were 4477 FMD outbreaks reported on a per province basis between June 1996 and September 2003. A kernel density of the outbreak locations was estimated, using a fixed radius and the centroid of each province as the designated location of all cases reported for the province. The radius that produced a density map with the highest correlation with expert opinion was 4° (latitude/longitude). Livestock density was used as a proxy for the underlying population at risk of acquiring FMD. Livestock and outbreak density maps were overlain to obtain the number of outbreaks and livestock in each of 15,599 cells covering the mapped surface of the country. A spatial scan statistic was applied to the density-smoothed data assuming that the outbreaks had a Poisson distribution. Results were compared with those obtained using a spatial scan statistic on provincially aggregated data. Application of the spatial scan statistic on the density-smoothed data allowed identification of clusters (P < 0.01) related more to the actual geographic distribution of cases (expert opinion) and of animals at risk, than to the distribution of the provinces. Significant clusters of FMD were identified that coincided with roads, neighboring countries, and high-density population areas, suggesting that the region may represent a route for cross-continent transmission of FMD.  相似文献