Primer registro de Achimenes admirabilis (Gesneriaceae) para la flora de Tabasco, México

ResumenSe da a conocer un nuevo registro de Achimenes admirabilis para México. Esta especie solo se había registrado en los estados de Oaxaca y Veracruz. Colectas recientes en el área municipal de Tenosique, extienden el intervalo de distribución de la especie al estado de Tabasco.AbstractA new record of Achimenes admirabilis is reported for Mexico. This species had only been reported in the states of Oaxaca and Veracruz. Recent collections in the municipality of Tenosique, extend its range to the state of Tabasco

Laboratory and industrial testing of silica bricks for coke ovens

In order to rationalize the reconstruction of coke ovens' walls in a local steelmaking, a set of laboratory and industrial tests was carried out on silica KN bricks. Two types of bricks that are currently used in oven construction were analyzed, one being less expensive than the other. On the other hand, 25 year-old original bricks were also studied. The results of laboratory tests were analyzed taking into account the requirements of DIN 1089 standard. Additionally, an evaluation of costs was carried out.Fil: Camerucci, Maria Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Tomba Martinez, Analia Gladys. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Cavalieri, Ana Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: de Córdova, M.. SIDERAR; ArgentinaFil: Beltrán, D.. SIDERAR; ArgentinaFil: Topolevsky, R.. SIDERAR; Argentin

Generalized Toda Theory from Six Dimensions and the Conifold

Recently, a physical derivation of the Alday-Gaiotto-Tachikawa correspondence has been put forward. A crucial role is played by the complex Chern-Simons theory arising in the 3d-3d correspondence, whose boundary modes lead to Toda theory on a Riemann surface. We explore several features of this derivation and subsequently argue that it can be extended to a generalization of the AGT correspondence. The latter involves codimension two defects in six dimensions that wrap the Riemann surface. We use a purely geometrical description of these defects and find that the generalized AGT setup can be modeled in a pole region using generalized conifolds. Furthermore, we argue that the ordinary conifold clarifies several features of the derivation of the original AGT correspondence.Comment: 27+2 pages, 3 figure

3D‐Architected Alkaline‐Earth Perovskites

3D ceramic architectures are captivating geometrical features with an immense demand in optics. In this work, an additive manufacturing (AM) approach for printing alkaline-earth perovskite 3D microarchitectures is developed. The approach enables custom-made photoresists suited for two-photon lithography, permitting the production of alkaline-earth perovskite (BaZrO 3, CaZrO 3, and SrZrO 3) 3D structures shaped in the form of octet-truss lattices, gyroids, or inspired architectures like sodalite zeolite, and C 60 buckyballs with micrometric and nanometric feature sizes. Alkaline-earth perovskite morphological, structural, and chemical characteristics are studied. The optical properties of such perovskite architectures are investigated using cathodoluminescence and wide-field photoluminescence emission to estimate the lifetime rate and defects in BaZrO 3, CaZrO 3, and SrZrO 3. From a broad perspective, this AM methodology facilitates the production of 3D-structured mixed oxides. These findings are the first steps toward dimensionally refined high-refractive-index ceramics for micro-optics and other terrains like (photo/electro)catalysis.</p

Melanogaster coccolobae sp. nov. (Paxillaceae, Boletales), un hongo hipogeo tropical de las áreas urbanas de Quintana Roo, México

Background and Aims: The genus Melanogaster is characterized by its hypogeous to semi hypogeous habit, brownish basidiomata, gel-filled gleba locules, and globose to ellipsoid basidiospores. The genus is distributed in temperate zones, but sequences from Coccoloba root tips and a few basidiome collections have revealed its presence in the tropics. The aim of this article is to describe a new species of Melanogaster based on ecological, molecular, and morphological data. Methods: Specimens were collected in urban vegetation of Quintana Roo in the Yucatán Peninsula, Mexico. For morphological description, the classic protocols for sequestrate fungi were followed. The dried material was deposited in the mycological herbarium “José Castillo Tovar” of the Instituto Tecnológico de Ciudad Victoria (ITCV) and the herbarium of the Universidad Autónoma de Yucatán (UADY). Key results: Melanogaster coccolobae is presented as a new species from the urban gardens of Quintana Roo based on ecological, molecular, and morphological evidence. This species is characterized by its hypogeous to semi hypogeous basidioma, greyish orange, brown to reddish brown peridium composed of two layers, sweet smell, subglobose, ellipsoid or piriform basidiospores, and by its mycorrhizal association with Coccoloba spicata. Conclusions: Melanogaster coccolobae is the first species described from the Mexican Caribbean from urban gardens with Coccoloba spicata. More studies about the tropical sequestrate fungi are recommended.Antecedentes y Objetivos: El género Melanogaster se caracteriza por su hábito hipogeo a semi hipogeo, basidiomas parduscos, gleba con lóculos llenos de gel y basidiosporas globosas a elipsoides. El género se distribuye en zonas templadas, pero secuencias de ectomicorrizas de Coccoloba y pocas colecciones de basidiomas han revelado su presencia en los trópicos. El objetivo de este artículo es describir una nueva especie de Melanogaster a partir de datos ecológicos, moleculares y morfológicos. Métodos: Los especímenes fueron recolectados en jardines urbanos de Quintana Roo en la Península de Yucatán, México. Para la descripción morfológica se siguieron los protocolos clásicos para hongos secuestrados. El material se depositó en el herbario micológico “José Castillo Tovar” del Instituto Tecnológico de Ciudad Victoria (ITCV) y en el herbario de la Universidad Autónoma de Yucatán (UADY). Resultados clave: Melanogaster coccolobae se presenta como una nueva especie de los jardines urbanos de Quintana Roo con base en evidencia morfológica, ecológica y molecular. Esta especie se caracteriza por sus basidiomas hipogeos a semi hipogeos, peridio naranja grisáceo, marrón o marrón rojizo, compuesto por dos capas, olor dulce, basidiosporas subglobosas, elipsoides o piriformes y por formar asociación micorrízica con Coccoloba spicata. Conclusiones: Melanogaster coccolobae es la primera especie descrita del Caribe mexicano en jardines urbanos con Coccoloba spicata. Se recomiendan más estudios sobre los hongos secuestrados tropicales

The glitch-induced identity changes of PSR J1119-6127

We demonstrate that the high-magnetic field pulsar J1119-6127 exhibits three different types of behaviour in the radio band. Trailing the "normal" profile peak there is an "intermittent" peak and these components are flanked by two additional components showing very erratic "RRAT-like" emission. Both the intermittent and RRAT-like events are extremely rare and are preceded by a large amplitude glitch in the spin-down parameters. The post-glitch spin-down rate is smaller than the pre-glitch rate. This type of relaxation is very unusual for the pulsar population as a whole, but is observed in the glitch recovery of a RRAT. The abnormal emission behaviour in PSR J1119-6127 was observed up to three months after the epoch of the large glitch, suggestive of changes in the magnetospheric conditions during the fast part of the recovery process. We argue that both the anomalous recoveries and the emission changes could be related to reconfigurations of the magnetic field. Apart from the glitches, the spin-down of PSR J1119-6127 is relatively stable, allowing us to refine the measurement of the braking index (n=2.684\pm0.002) using more than 12 years of timing data. The properties of this pulsar are discussed in light of the growing evidence that RRATs do not form a distinct class of pulsar, but rather are a combination of different extreme emission types seen in other neutron stars. Different sub-classes of the RRATs can potentially be separated by calculating the lower limit on the modulation index of their emission. We speculate that if the abnormal behaviour in PSR J1119-6127 is indeed glitch induced then there might exist a population of neutron stars which only become visible in the radio band for a short duration in the immediate aftermath of glitch activity. These neutron stars will be visible in the radio band as sources that only emit some clustered pulses every so many years.Comment: 20 pages, 10 figures, Accepted for publication in MNRA

Imprisonment and internment: Comparing penal facilities North and South

Recent references to the ‘warehouse prison’ in the United States and the prisión-depósito in Latin America seem to indicate that penal confinement in the western hemisphere has converged on a similar model. However, this article suggests otherwise. It contrasts penal facilities in North America and Latin America in terms of six interrelated aspects: regimentation; surveillance; isolation; supervision; accountability; and formalization. Quantitatively, control in North American penal facilities is assiduous (unceasing, persistent and intrusive), while in Latin America it is perfunctory (sporadic, indifferent and cursory). Qualitatively, North American penal facilities produce imprisonment (which enacts penal intervention through confinement), while in Latin America they produce internment (which enacts penal intervention through release). Closely entwined with this qualitative difference are distinct practices of judicial involvement in sentencing and penal supervision. Those practices, and the cultural and political factors that underpin them, represent an interesting starting point for the explanation of the contrasting nature of imprisonment and internment

CARACTERÍSTICAS FÍSICO-QUÍMICAS DA CASCA DO MARACUJÁ AMARELO (Passiflora edulis Flavicarpa Degener) OBTIDA POR SECAGEM

O objetivo desse trabalho foi determinar a composição centesimal e o teor de fibras (solúvel, insolúvel e alimentar) da casca do maracujá amarelo (Passiflora edulis Flavicarpa Degener), obtida por secagem. Foram utilizadas amostras produzidas na região de Araquari, Santa Catarina (Brasil). Por meio dos resultados obtidos foi possível observar que a casca desse maracujá é rica em fibras solúveis e minerais. Assim, as indústrias de processamento de suco de maracujá podem utilizar o resíduo orgânico dessas cascas para desenvolver novos produtos a base de fibras

Plasma metabolomics and clinical predictors of survival differences in COPD patients

Background: Plasma metabolomics profile (PMP) in COPD has been associated with clinical characteristics, but PMP’s relationship to survival has not been reported. We determined PMP differences between patients with COPD who died an average of 2 years after enrollment (Non-survivors, NS) compared to those who survived (S) and also with age matched controls (C). Methods: We studied prospectively 90 patients with severe COPD and 30 controls. NS were divided in discovery and validation cohorts (30 patients each) and the results compared to the PMP of 30 S and C. All participants completed lung function tests, dyspnea scores, quality of life, exercise capacity, BODE index, and plasma metabolomics by liquid and gas chromatography / mass spectometry (LC/MS, LC/MS2 , GC/MS). Statistically, we used Random Forest Analysis (RFA) and Support Vector Machine (SVM) to determine metabolites that differentiated the 3 groups and compared the ability of metabolites vs. clinical characteristics to classify patients into survivors and non-survivors. Results: There were 79 metabolites statistically different between S and NS [p < 0.05 and false discovery rate (q value) < 0.1]. RFA and SVM classification of COPD survivors and non-survivors had a predicted accuracy of 74 and 85% respectively. Elevation of tricyclic acid cycle intermediates branched amino acids depletion and increase in lactate, fructose and xylonate showed the most relevant differences between S vs. NS suggesting alteration in mitochondrial oxidative energy generation. PMP had similar predictive power for risk of death as information provided by clinical characteristics. Conclusions: A plasma metabolomic profile characterized by an oxidative energy production difference between survivors and non-survivors was observed in COPD patients 2 years before death