Fully relativistic calculation of magnetic properties of Fe, Co and Ni adclusters on Ag(100)

We present first principles calculations of the magnetic moments and magnetic anisotropy energies of small Fe, Co and Ni clusters on top of a Ag(100) surface as well as the exchange-coupling energy between two single adatoms of Fe or Co on Ag(100). The calculations are performed fully relativistically using the embedding technique within the Korringa-Kohn-Rostoker method. The magnetic anisotropy and the exchange-coupling energies are calculated by means of the force theorem. In the case of adatoms and dimers of iron and cobalt we obtain enhanced spin moments and, especially, unusually large orbital moments, while for nickel our calculations predict a complete absence of magnetism. For larger clusters, the magnitudes of the local moments of the atoms in the center of the cluster are very close to those calculated for the corresponding monolayers. Similar to the orbital moments, the contributions of the individual atoms to the magnetic anisotropy energy strongly depend on the position, hence, on the local environment of a particular atom within a given cluster. We find strong ferromagnetic coupling between two neighboring Fe or Co atoms and a rapid, oscillatory decay of the exchange-coupling energy with increasing distance between these two adatoms.Comment: 8 pages, ReVTeX + 4 figures (Encapsulated Postscript), submitted to PR

The Influence of Perceived Parenting on Substance Initiation Among Mexican Children

Parents shape their children\u27s behaviors and impact their developmental trajectories. Despite this, few studies have examined the potential relationship between child reported parenting factors and lifetime substance use and use intentions. The current study examined the potential impact of parenting factors (i.e., positive parenting, supervision, parental illicit substance use, substance-specific communication) on early substance use and intentions among Latinx children. Data for the present study utilized a representative sample of Mexican children (n = 52,171; 5th and 6th grades) who participated in a national survey on substance use. Children reported their demographics, lifetime substance use/intentions, and perceived parenting characteristic and practices. Child reported parental (i.e., individual or both parents) illicit substance use was associated with the largest increases in risk for reporting lifetime use of all substances examined. Higher levels of positive parenting were consistently associated with reductions in risk for reporting intentions for and use of all substances examined. Parent-child substance specific communication was not significantly related to child reported lifetime use or use intentions, with the exception of a minor decrease in the odds of reporting lifetime inhalant use. Supervision was associated with small to modest increase in risk. Substance use prevention efforts targeting Latinx populations may benefit from promoting positive parenting and direct supervision during childhood. Targeted prevention efforts may be needed for Latinx children exposed to parental illicit substance use, as they may be especially at risk for early substance initiation

Eyespot resistance gene Pch-1 from Aegilops ventricosa is associated with a different chromosome in wheat line H-93-70 than the resistance factor in "Roazon" wheat

The hexaploid wheat line H-93-70 carries a gene (Pch-1) that has been transferred from the wild grass Aegilops ventricosa and confers a high degree of resistance to eyespot diesease, caused by the fungus Pseudocercosporella herpotrichoides. Crosses of the resistant line H-93-70 with the susceptible wheat Pané 247 and with a 7D/7Ag wheat/Agropyron substitution line were carried out and F2 kernels were obtained. The kernels were cut transversally and the halves carrying the embryos were used for the resistance test, while the distal halves were used for genetic typing. Biochemical markers were used to discriminate whether the transferred Pch-1 gene was located in chromosome 7D, as is the case for a resistance factor present in Roazon wheat. In the crosses involving Pané 247, resistance was not associated with the 7D locus Pln, which determines sterol ester pattern (dominant allele in H-93-70). In the crosses with the 7D/7Ag substitution line, resistance was neither associated with protein NGE-11 (7D marker), nor alternatively inherited with respect to protein C-7 (7Ag marker). It is concluded that gene Pch-1 represents a different locus and is not an allele of the resistance factor in Roazon whea

Comprehensive characterization of a novel, oncogenic and targetable SEPTIN6::ABL2 fusion in T-ALL

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Use of sonic tomography to detect and quantify wood decay in living trees.

Premise of the studyField methodology and image analysis protocols using acoustic tomography were developed and evaluated as a tool to estimate the amount of internal decay and damage of living trees, with special attention to tropical rainforest trees with irregular trunk shapes.Methods and resultsLiving trunks of a diversity of tree species in tropical rainforests in the Republic of Panama were scanned using an Argus Electronic PiCUS 3 Sonic Tomograph and evaluated for the amount and patterns of internal decay. A protocol using ImageJ analysis software was used to quantify the proportions of intact and compromised wood. The protocols provide replicable estimates of internal decay and cavities for trees of varying shapes, wood density, and bark thickness.ConclusionsSonic tomography, coupled with image analysis, provides an efficient, noninvasive approach to evaluate decay patterns and structural integrity of even irregularly shaped living trees

Estimación dinámica de parámetros para un modelo ecológico del Embalse Los Molinos

Fil: Rodriguez Reartes, S. B. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Estrada, V. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Bazán, R. Instituto Sup de Estudios Ambientales; Argentina.Fil: Bazán, R. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Larrosa, N. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: López, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: López, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: Busso, F. Aguas Cordobesas S.A.; Argentina.Fil: Díaz, M. S. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.En este trabajo, presentamos y calibramos un modelo de calidad de agua basado en primeros principios, el cual representa los procesos ecológicos a través de un complejo set de ecuaciones algebraicodiferenciales. El modelo requiere la estimación de numerosos parámetros para ajustar a las condiciones ambientales específicas del sitio en estudio. Se consideran los gradientes de las variables de estado a lo largo de la columna de agua, resultando en un sistema de ecuaciones algebraicas y diferenciales a derivadas parciales. Luego, el sistema es transformado a un sistema ordinario diferencial-algebraico (EDA) por discretización espacial del cuerpo de agua en capas horizontales. Los principales parámetros biogeoquímicos del modelo son obtenidos por resolución de un problema de estimación dinámica de parámetros, sujeto al EDA formulado. Los parámetros calculados permiten una representación apropiada de la dinámica del cuerpo de agua, como se muestra en los resultados numéricos.Fil: Rodriguez Reartes, S. B. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Estrada, V. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Fil: Bazán, R. Instituto Sup de Estudios Ambientales; Argentina.Fil: Bazán, R. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Larrosa, N. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: Cossavella, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: López, A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de química Industrial y Aplicada; Argentina.Fil: López, A. Instituto de Ciencia y Tecnología de Alimentos; Argentina.Fil: Busso, F. Aguas Cordobesas S.A.; Argentina.Fil: Díaz, M. S. Universidad Nacional del Sur. Consejo Nacional de Investigaciones Científicas y Técnicas. Planta Piloto de Ingeniería Química; Argentina.Otras Ingeniería Químic