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| 1 | Erosion problem in tool steel using cold box core-making process显示文摘This paper presents the erosion results of the AISI H13 steel impinged by resin-bonded silica sand, using a testing rig that closely simulates the real blowing conditions during industrial core-making. Steel specimens were heat treated to obtain hardness of 294, 445 and 595 HV200 (29, 45 and 55 HRC). Erosion tests were carried out at impingement angles from 20° to 90° and air drag pressures of 1.38, 2.07 and 2.76 bar (20, 30 and 40 psi). The main results are summarized as follows:(i) The harder material, the lower erosion;(ii) the maximum erosion rate is at 30°;(iii) Little difference in erosion rate at impact angle of 60° and 90° for a constant pressure tested regardless of the hardness level;(iv) As the pressure increases, so does the erosion rate, being more sensitive for low impact angles. Finally, a differential form of the general erosion equation is applied on a practical core-making case to evaluate the erosion rate of the H13 steel at 30° and 90° impingement angles. | Eduardo Rodríguez Alberto Pérez Rafael David Mercado-Solis Velasco-Téllez Abraham Omar Jimenez Martin Flores Marco Aurelio Gonzalez Jesus Ibarra | 2019 | China Foundry2019，16，3： | 2 |
| 2 | The influence of elevation on soil properties and forest litter in the Siliceous Moncayo Massif,SW Europe显示文摘Understanding the effects of elevation and related factors(climate,vegetation) on the physical and chemical soil properties can help to predict changes in response to future climate or afforestation forcings.This work aims to contribute to the knowledge of soil evolution and the classification of forest soils in relation to elevation in the montane stage,with special attention to podzolization and humus forms.The northern flank of the Moncayo Massif(Iberian Range,SW Europe) provides a unique opportunity to study a forest soils catena within a consistent quartzitic parent material over a relatively steep elevation gradient.With increasing elevation,pH,base saturation,exchangeable potassium,and fine silt-sized particles decrease significantly,while organic matter,the C/N ratio,soil aggregate stability,water repellency and coarse sand-sized particles increase significantly.The soil profiles shared a set of properties in all horizons:loamy-skeletal particle-size,extreme acidity(pH-H_2O<5.6) and low base saturation(<50%).The most prevalent soil forming processes in the catena include topsoil organic matter accumulation and even podzolization,which increases with elevation.From the upper to lower landscape positions of wooded montane stage of the Moncayo Massif,mull-moder-mor humus and an UmbrisolCambisol-Podzol soil unit sequences were found. | BADIA David RUIZ Alberto GIRONA Antonio MARTI Clara CASANOVA Jose IBARRA Paloma ZUFIAURRE Raquel | 2016 | Journal of Mountain Science2016，13，12： | 2 |
| 3 | Dynamic properties of thermoplastics butadiene-styrene (SBS) and oxidized short carbon fiber composite materials显示文摘 | Luis Ibarra David Panos | 1998 | Journal of Applied Polymer Science1998，67，： | 1 |
| 4 | Paper pulp delignification using laccase and natural mediators 显示文摘 | Susana Camarero David Ibarra Martinez Angel T | 2007 | Enzyme and Microbial Technology2007，40，5： | 1 |
| 5 | Lignin-derived compounds as efficient laccase mediators for decolorization of defferent types of recalcitrant dyes显示文摘 | Susana Camarero David Ibarra Maria Jesfis Martinez | 2005 | Applied and Environmental Microbiology2005，71，4： | 1 |
| 6 | Exploring the enzymatic parameters for optimal delignification of eucalypt pulp by laccase-mediator 显示文摘 | David Ibarra Javier Romero | 2006 | Enzyme and Microbial Technology2006，39，6： | 1 |
| 7 | Paper pulp delignification using laccase and natural mediators显示文摘 | Susana Camarero David Ibarra Angel T Martlnez | 2007 | Enzyme and Microbial Technology2007，40，5： | 1 |
| 8 | Dynamic properties of thermoplastics butadien e-styrene(SBS) and oxidized short carbon fiber composite materials显示文摘 | PANOS DAVID | 1998 | Journal of Applied Polymer Science1998，67，10： | 1 |
| 9 | TNFRSF11B gene haplotype and its association with bone mineral density variations in postmenopausal Mexican-Mestizo women显示文摘 | David Rojano-Mejía Ramón Mauricio Coral-Vázquez Leticia Cortes Espinosa Sandra Romero-Hidalgo Guillermo López-Medina María del Carmen Aguirre García Agustín Coronel Roberto Ibarra Patricia Canto | 2011 | Maturitas2011，，1： | 1 |
| 10 | Paper pulp delignification using laccase and natural mediators 显示文摘 | Susana Camarero David Ibarra Angel T Martinez | 2007 | Enzyme and Microbial Technology2007，40，5： | 1 |
| 11 | Removed of lipophilie extraetives from paper pulp by laccase and lignin-defived phenols as natural mediators显示文摘 | Aria Gutierrez ]orge Rencoret David ibarra | 2007 | Environmental Science and Technology2007，41，11： | 1 |
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