Evidence for maternal transmission fo a putative endosymbiont in the digestive gland of Pomacea canaliculata (Architaenioglossa, Ampullariidae)

The digestive gland of the apple snail Pomacea canaliculata lodges two types of pigmented corpuscles (identified as C and K corpuscles) which has been proposed as endosymbiont/s. Both corpuscular types are always present in the digestive gland of adult snails, they are released into the tubuloacinar lumen and are later expelled in the feces. On their part, hatchlings lack any C or K corpuscles in the digestive gland as well as in their feces, whereas C corpuscles appear in both the gland and feces within one week after hatching. Hence, it is possible that the detritivorous hatchlings acquire the putative C-endosymbiont from feces in the sediments where they live, i.e. through ‘lateral’ or ‘horizontal’ transmission. This possibility was put to test in an experiment in which we prevented any lateral transmission, by a 7-days aseptic culture, with no food, of aseptically obtained hatchlings. At the end of the experiment, we observed that most juveniles had survived the culture period, and hence the digestive glands and feces of survivors were studied by light microscopy of resin embedded, toluidine blue-stained sections. All studied glands and fecal samples showed C corpuscles. It is concluded that lateral transmission of the endosymbiont, if any, is not indispensable for the acquisition of the endosymbiont by hatchlings.Fil: Koch, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Vega, Israel Aníbal. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina. Universidad Nacional de Cuyo; ArgentinaFil: Castro Vazquez, Alfredo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina. Universidad Nacional de Cuyo; Argentin

PSYCHOLOGICAL AND SLEEP QUALITY DIFFERENCES BETWEEN CHRONIC DAILY HEADACHE AND TEMPOROMANDIBULAR DISORDERS PATIENTS

The aim of this study was to investigate whether chronic daily headache (CDH) and temporomandibular disorders (TMD) patients present with different psychological and sleep quality characteristics. Sixty seven patients diagnosed with CDH according to Silberstein et al.s classification criteria were matched by age, sex, pain intensity, and pain duration with 67 patients who had a primary diagnosis of myofascial pain (MP), and 67 patients with a primary diagnosis of TMJ intracapsular pain (IC) according to the Research Diagnostic Criteria for TMD. The CDH group was comprised of three mutually exclusive diagnostic groups, that is transformed migraine (n=35), chronic tension-type headache (n=26), and other CDH (n=6). All CDH sub-groups showed similar psychological and sleep quality profiles. All patients completed a battery of psychological and sleep quality questionnaires. The CDH and MP groups revealed higher levels of psychological distress than the IC group on most psychological domains. The MP group also revealed numerically higher levels of psychological distress in most psychological domains than the CDH group, although these differences where not statistically significant. We did not find statistically significant differences between the three groups on post traumatic stress symptoms either. Sleep quality was significantly worse in the MP group than in the CDH and IC groups. These results are discussed in the context of multimodal patient evaluation and treatments that are necessary for successful clinical management

Color-Kinematics Duality in Multi-Regge Kinematics and Dimensional Reduction

In this note we study the applicability of the color-kinematics duality to the scattering of two distinguishable scalar matter particles with gluon emission in QCD, or graviton emission in Einstein gravity. Previous analysis suggested that direct use of the Bern-Carrasco-Johansson double-copy prescription to matter amplitudes does not reproduce the gravitational amplitude in multi-Regge kinematics. This situation, however, can be avoided by extensions to the gauge theory, while maintaning the same Regge limit. Here we present two examples of these extensions: the introduction of a scalar contact interaction and the relaxation of the distinguishability of the scalars. In both cases new diagrams allow for a full reconstruction of the correct Regge limit on the gravitational side. Both modifications correspond to theories obtained by dimensional reduction from higher-dimensional gauge theories.Comment: 16 pages, 1 figure; v2 minor changes, typos corrected. It matches the version published in JHE

Color-kinematics duality and dimensional reduction for graviton emission in Regge limit

In this talk we review the work in [1,2,3] where we have studied the applicability of the color-kinematics duality to the scattering of two distinguishable scalar matter particles with one gluon emission in QCD, or one graviton emission in Einstein gravity. We have shown that the duality works well in the Regge limit under two different extensions of the gauge theory: the introduction of a new scalar contact interaction and the relaxation of the distinguishability of the scalars. Both modifications correspond to theories obtained by dimensional reduction from higher-dimensional pure gauge theories.Comment: 10 pages, no figures. Presented by Agustin Sabio Vera at the Low x workshop, May 30 - June 4 2013, Rehovot and Eilat, Israe

ASteCA: Automated Stellar Cluster Analysis

We present the Automated Stellar Cluster Analysis package (ASteCA), a suit of tools designed to fully automate the standard tests applied on stellar clusters to determine their basic parameters. The set of functions included in the code make use of positional and photometric data to obtain precise and objective values for a given cluster’s center coordinates, radius, luminosity function and integrated color magnitude, as well as characterizing through a statistical estimator its probability of being a true physical cluster rather than a random overdensity of field stars. ASteCA incorporates a Bayesian field star decontamination algorithm capable of assigning membership probabilities using photometric data alone. An isochrone fitting process based on the generation of synthetic clusters from theoretical isochrones and selection of the best fit through a genetic algorithm is also present, which allows ASteCA to provide accurate estimates for a cluster’s metallicity, age, extinction and distance values along with its uncertainties. To validate the code we applied it on a large set of over 400 synthetic MASSCLEAN clusters with varying degrees of field star contamination as well as a smaller set of 20 observed Milky Way open clusters (Berkeley 7, Bochum 11, Czernik 26, Czernik 30, Haffner 11, Haffner 19, NGC 133, NGC 2236, NGC 2264, NGC 2324, NGC 2421, NGC 2627, NGC 6231, NGC 6383, NGC 6705, Ruprecht 1, Tombaugh 1, Trumpler 1, Trumpler 5 and Trumpler 14) studied in the literature. The results show that ASteCA is able to recover cluster parameters with an acceptable precision even for those clusters affected by substantial field star contamination. ASteCA is written in Python and is made available as an open source code which can be downloaded ready to be used from its official site.Fil: Perren, Gabriel Ignacio. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina; ArgentinaFil: Vazquez, Ruben Angel. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina; ArgentinaFil: Piatti, Andres Eduardo. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Aprovechamiento de los desechos de la producción de biodiesel (glicerol) a través de su uso para la síntesis de acroleína mediante una catálisis por deshidratación

103 páginas. Maestría en Ciencias e Ingeniería Ambientales.Debido a la problemática ambiental existente sobre el aprovechamiento, agotamiento y contaminación del petróleo, se ha dado a la búsqueda de nuevas fuentes de energía, las cuales puedan cubrir la demanda energética, la cual día a día se va incrementando; creciendo el interés por energías renovables, entre las cuales destacan las energías de biomasa para la producción de combustibles renovables, teniendo la ventaja de generar bajas emisiones de contaminantes; una de ellas es el biodiesel. La presente tesis se centró en la búsqueda del catalizador que nos proporcione una alta conversión y selectividad hacia la acroleína (material ampliamente usado en la industria como intermediario para pesticidas, colorantes, materiales de construcción), tomando como referencias investigaciones previas sobre el uso de catalizadores de ceria y alúmina mesoporosos, se planteó el uso de un catalizador de alúmina dopado con Cerio impregnados con Pt. Se sintetizaron 5 catalizadores con diferentes relaciones molares de ceria/alúmina por el método de sol-gel, los cuales fueron caracterizados y evaluados mediante la reacción de deshidratación del glicerol, variando las relaciones de catalizador/alimentación (W/F), obteniendo las conversiones más altas a mayor cantidad de catalizador. El catalizador AC- 85 presentó la mayor área superficial y la mayor cantidad de sitios ácidos, con el cual se obtuvieron conversiones alrededor del 100% a un tiempo de 10 minutos. En el tiempo de reacción analizada, se observó una disminución en la conversión, obteniendo valores finales del 50 al 70%, esto nos confirma la estabilidad del soporte Con lo que respecta a la selectividad, el catalizador AC-85 presentó mayor selectividad hacia el acetol (alrededor de un 40%) y el catalizador AC-15 presentó mayor selectividad hacia la acroleína.Consejo Nacional de Ciencia y Tecnología (México)

Doubly Efficient Interactive Proofs over Infinite and Non-Commutative Rings

We introduce the first proof system for layered arithmetic circuits over an arbitrary ring $R$ that is (possibly) non-commutative and (possibly) infinite, while only requiring black-box access to its arithmetic and a subset $A \subseteq R$. Our construction only requires limited commutativity and regularity properties from $A$, similar to recent work on efficient information theoretic multi-party computation over non-commutative rings by Escudero and Soria-Vazquez (CRYPTO 2021), but furthermore covering infinite rings. We achieve our results through a generalization of GKR-style interactive proofs (Goldwasser, Kalai and Rothblum, Journal of the ACM, 2015). When $A$ is a subset of the center of $R$, generalizations of the sum-check protocol and other building blocks are not too problematic. The case when the elements of $A$ only commute with each other, on the other hand, introduces a series of challenges. In order to overcome those, we need to introduce a new definition of polynomial ring over a non-commutative ring, the notion of left (and right) multi-linear extensions, modify the layer consistency equation and adapt the sum-check protocol. Despite these changes, our results are compatible with recent developments such as linear time provers. Moreover, for certain rings our construction achieves provers that run in sublinear time in the circuit size. We obtain such result both for known cases, such as matrix and polynomial rings, as well as new ones, such as for some rings resulting from Clifford algebras. Besides efficiency improvements in computation and/or round complexity for several instantiations, the core conclusion of our results is that state of the art doubly efficient interactive proofs do not require much algebraic structure. This enables exact rather than approximate computation over infinite rings as well as agile proof systems, where the black-box choice of the underlying ring can be easily switched through the software life cycle