Empirical testing of Tsallis' Thermodynamics as a model for dark matter halos

We study a dark matter halo model from two points of view: the ``stellar polytrope'' (SP) model coming from Tsallis' thermodynamics, and the one coming from the Navarro-Frenk-White (NFW) paradigm. We make an appropriate comparison between both halo models and analyzing the relations between the global physical parameters of observed galactic disks, coming from a sample of actual galaxies, with the ones of the unobserved dark matter halos, we conclude that the SP model is favored over the NFW model in such a comparison.Comment: 5 pages, 1 figure, To appear in the Proceedings of X Mexican Workshop on Particles and Fields, Morelia Michoac\'an, M\'exico, November 7-12, 200

Entropy considerations in constraining the mSUGRA parameter space

We explore the use of two criteria to constraint the allowed parameter space in mSUGRA models. Both criteria are based in the calculation of the present density of neutralinos as dark matter in the Universe. The first one is the usual ``abundance'' criterion which is used to calculate the relic density after the ``freeze-out'' era. To compute the relic density we used the numerical public code micrOMEGAs. The second criterion applies the microcanonical definition of entropy to a weakly interacting and self-gravitating gas evaluating then the change in the entropy per particle of this gas between the ``freeze-out'' era and present day virialized structures. An ``entropy-consistency'' criterion emerges by comparing theoretical and empirical estimates of this entropy. The main objective of our work is to determine for which regions of the parameter space in the mSUGRA model are both criteria consistent with the 2$\sigma$ bounds according to WMAP for the relic density: $0.0945<\Omega_{CDM}h^2<0.1287$. As a first result, we found that for $A_0=0$, sgn$\mu=+$, small values of tan$\beta$ are not favored; only for tan$\beta\simeq50$ are both criteria significantly consistent.Comment: 5 pages, 1 figure. To appear in the Proceedings of X Mexican Workshop on Particles and Fields, Morelia Michoac\'an, M\'exico, November 7-12, 200

Peningkatan Kinerja Guru melalui Musyawarah Guru Mata Pelajaran ( MGMP ) Bahasa Indonesia di SMPN 1 Labuhan Haji Tahun 2016/2017

Tujuan penelitian ini adalah untuk meningkatkan kinerja guru Bahasa Indonesia dalam (1) merencanakan pembelajaran, (2) menerapkan strategi pembelajaran, (3) mengelola kelas, dan mengevaluasi pembelajaran melalui pelaksanaan MGMP ( Musyawarah Guru Mata Pelajaran ) di SMPN 1 Labuhan Haji Kabupaten Lombok Timur. Pendekatan yang digunakan adalah pendekatan kuantitatif dengan jenis penelitian tindakan dengan dua siklus. Obyek penelitian ini adalah 15 guru Bahasa Indonesia 15 guru Bahasa Indonesia yang menjadi anggota MGMP Bahasa Indonesia Rayon Tengah yang kegiatannya dipusatkan di SMPN 1 Labuhan Haji Kabupaten Lombok Timur. Instrumen pengumpulan data yang digunakan adalah tes pengetahuan kinerja guru, pedoman observasi, wawancara, penilaian portofolio. Pengujian hipotesis dilakukan dengan melihat peningkatan kinerja guru persiklus. Rata-rata skor tes kinerja meningkat dari 53,2 hingga mencapai 68,9 pada siklus II. Karena skor kinerja telah mencapai 68,9 ( dibulatkan menjadi 70 ), maka Hipotesis alternatif (Ha) yang menyatakan pelaksanaan MGMP di SMPN 1 Labuhan Haji dapat meningkatkan kinerja guru dalam merencanakan pembelajaran, menerapkan strategi pembelajaran, pengelolaan kelas, dan mengevaluasi pembelajaran diterima. Hasil penelitian ini adalah bahwa pelaksanaan MGMP di SMP N 1 Labuhan Haji dapat meningkatkan kinerja guru Bahasa Indonesia dalam merencanakan pembelajaran, menerapkan strategi pembelajaran, mengelola kelas dan mengevaluasi pembelajaran. Dengan demikian pelaksanaan MGMP yang dilaksanakan berdasarkan prinsip-prinsip manajemen sumberdaya manusia dapat meningkatkan kinerja guru Bahasa Indonesia dalam pembelajaran. Oleh karena itu, disarankan pada guru, kepala sekolah, dan pengawas pendidikan agar memberdayakan MGMP MGMP yang ada terutama di sekolah karena dapat meningkatkan profesionalisme guru

Reforma a la justicia tributaria chilena: alcance de los cambios introducidos por la ley 20.322 y derecho comparado

53 p.La presente investigación jurídica tiene como objetivo describir los cambios que introduce la ley 20.322 de Perfeccionamiento de la Jurisdicción Tributaria Chilena a la actual y aún vigente justicia tributaria nacional, identificando los distintos ámbitos modificados por la citada normativa y delimitando el real y específico alcance para nuestro derecho tributario desde la perspectiva practica, es decir, las normas procedimentales y la estructura del modificado procedimiento de reclamación tributaria, culminando con una somera pero concisa descripción de la experiencia de la legislación brasilera en la misma mater----------/--- ABSTRACT: The present juridical investigation has the objective to describe the changes introduced by the law 20.322 of the Chilean Tributary Justice, to the current and still valid tributary law, identifying the distinct fields modified by the quoted normative and delimiting the real and specific extention on this subject, analyzing the changes on the procediment of tributary justice, and ending with a brief description of the brazilian experience on the same subject

Vulneracion de las garantias constitucionales por las potestades fiscalizadoras del servicio de impuestos internos, en la jurisprudencia de los tribunales superiores de justicia nacionales

62 p.El presente trabajo, analiza un grupo de sentencias en materia tributaria, emanadas de los Tribunales Superiores del Estado, en especial aquellas que resuelven Recursos de Protección. De esta manera, se ponen en evidencia las garantías que con frecuencia se vulneran por el poder fiscalizador del Servicio de Impuestos Internos y la posible causa del ejercicio ilegal o arbitrario de las facultades fiscalizadoras de la entidad pública. Se observa, que la mayoría de las acciones intentadas se rechazan por vicios formales, y aquellas que resuelven respecto del fondo de las cuestiones sometidas a su conocimiento, son desfavorables para el contribuyente./ ABSTRACT: This paper analyzes a group of judicial decisions in tax matters, dictated by the Superior Courts of the State, especially those that solve protection resource. Thus, the article shows that guarantees than often are violated by prosecutorial power of the Internal Revenue Services and the probable cause of illegal or arbitrary exercise of the power of the public entity. It is observed that most actions filed arerejected by formal defects and those that are solve respect to the content are mostly unfavorable to the taxpaye

La estructura de los Tribunales Tributarios y aduaneros de la ley 20.322

66 p.La recaudación de recursos por parte del Estado para el desarrollo de sus diversas actividades, a través del establecimiento de tributos, es una de sus labores fundamentales y constituye su principal fuente de ingreso. Ante ello el derecho se ve enfrentado al desafío de establecer normas, órganos y procedimientos que le permitan una eficaz recaudación de éstos y que a la vez respeten los derechos de diversa índole de los particulares que se ven involucrados en este proceso, en especial sus derechos fundamentales. El establecimiento de tribunales cuya estructura y organización permita el cumplimiento de dicha obligación es lo que me ha motivado a realizar el presente estudio: Analizar la estructura de los nuevos Tribunales Tributarios y Aduaneros que establece la Ley Nº20.322 y esclarecer si constituyen un avance frente a la antigua judicatura tributaria y por otro lado dilucidar cuáles son las materias que aún falta por perfecciona

Biotechnological production of carotenoids by yeasts: an overview

Nowadays, carotenoids are valuable molecules in different industries such as chemical, pharmaceutical, poultry, food and cosmetics. These pigments not only can act as vitamin A precursors, but also they have coloring and antioxidant properties, which have attracted the attention of the industries and researchers. The carotenoid production through chemical synthesis or extraction from plants is limited by low yields that results in high production costs. This leads to research of microbial production of carotenoids, as an alternative that has shown better yields than other aforementioned. In addition, the microbial production of carotenoids could be a better option about costs, looking for alternatives like the use of low-cost substrates as agro-industrials wastes. Yeasts have demonstrated to be carotenoid producer showing an important growing capacity in several agro-industrial wastes producing high levels of carotenoids. Agro-industrial wastes provide carbon and nitrogen source necessary, and others elements to carry out the microbial metabolism diminishing the production costs and avoiding pollution from these agro-industrial wastes to the environmental. Herein, we discuss the general and applied concepts regarding yeasts carotenoid production and the factors influencing carotenogenesis using agro-industrial wastes as low-cost substrates

Synthesis and characterization of silver vanadates thin films for photocatalytic applications

Silver vanadates thin films were deposited by a hybrid deposition system combining laser ablation and thermal evaporation. A high purity vanadium target was ablated using the third harmonic of a Nd:YAG laser whereas high purity silver pellets were evaporated. The as-deposited thin films were subjected to thermal treatments at 400 °C to obtain crystalline films. For films without Ag amorphous V2O5 thin films were deposited and as the Ag is incorporated in the material different silver vanadates were obtained. The effect of the silver load on the composition, structure, optical properties, surface morphology and photocatalytic response of the deposited films was studied. The film composition, determined by X-ray photoelectron spectroscopy, reveals Ag contents from 5.5 to 18.9 at.%. The crystalline phases formed were identified by micro-Raman Spectroscopy; the results indicate the formation of three silver vanadates depending on the silver content. The morphology was observed using scanning electron microscopy, the filmś surface changes from a smooth surface to belts covering the surface and finally Ag nanoparticles are observed at the higher Ag contens. Optical properties determined from UV–vis reveal the presence of the surface plasmon signal in films containing silver. The films were tested in the photocatalytic degradation of Malachite Green dye reaching maximum degradations degrees close to 53% under solar irradiation. Reactive species trapping experiments suggest that O2 − produced by the O2 reduction via the photogenerated electrons drives the photodegradation mechanismCB-168827 CB-240998 F. Gonzalez-Zavala thanks to CONACyT for the PhD and Beca Mixta grants, and also to the SIEA-UAEM for the beca movilidad para estudios avanzados 2016. E. Rodríguez-Castellón thanks to project CTQ2015-68951-C3-3-R of Ministerio de Economía y Competitividad (Spain) and FEDER funds

Oregano essential oil-pectin edible films as anti-quorum sensing and food antimicrobial agents

Edible films can be used as carriers for antimicrobial compounds to assure food safety andquality; in addition, pathogenesis of food bacteria is related to a cell to cell communicationmechanism calledquorum sensing(QS). Oregano essential oil (OEO) has proved to beuseful as food antimicrobial; however, its foodapplications can be compromised by thevolatile character of its active constituents.Therefore, formulation of edible films containingOEO can be an alternative to improve its food usages. QS inhibitory activity of OEO andpectin-OEO films was evaluated usingChromobacterium violaceumas bacterial model.Additionally, antibacterial activity was tested againstEscherichia coliO157:H7,SalmonellaCholeraesuis,Staphylococcus aureus,andListeria monocytogenes. OEO was effective toinhibit bacterial growth at MIC of 0.24 mg/mL for all tested bacteria and MBC of 0.24,0.24, 0.48, and 0.24 mg/mL againstE. coliO157:H7,S.Choleraesuis,S. aureus, andL.monocytogenes, respectively. Pectin-films incorporated with 36.1 and 25.9 mg/mL of OEOshowed inhibition diameters of 16.3 and 15.2 mm forE. coliO157:H7; 18.1 and 24.2 mm forS.Choleraesuis; 20.8 and 20.3 mm forS. aureus; 21.3 and 19.3 mm forL. monocytogenes,respectively. Pectin-OEO film (15.7 mg/mL) was effective againstE. coliO157:H7 (9.3 mm),S. aureus(9.7 mm), andL. monocytogenes(9.2 mm), but not forS.Choleraesuis. Allconcentrations of OEO (0.0156, 0.0312, 0.0625 and 0.125 mg/mL) and pectin-OEO films(15.7, 25.9 and 36.1 mg/mL) showed a significant anti-QS activity expressed as inhibition ofviolacein production byC. violaceum. Additionally, the application of pectin-OEO films waseffective reducing total coliforms, yeast, and molds of shrimp and cucumber slices storedat 4◦C during 15 d.These results demonstrated the potential of pectin films enriched withOEO as food related microorganisms and QS inhibitorsFil: Alvarez, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Ingeniería En Alimentos; ArgentinaFil: Ortega Ramirez, Luis Alberto. Centro de Investigación en Alimentación y Desarrollo. Hermosillo; MéxicoFil: Gutierrez Pacheco, Maria Melissa. Centro de Investigación en Alimentación y Desarrollo. Hermosillo; MéxicoFil: Bernal Mercado, Thalia. Centro de Investigación en Alimentación y Desarrollo. Hermosillo; MéxicoFil: Rodriguez Garcia, Isela. Centro de Investigación en Alimentación y Desarrollo. Hermosillo; MéxicoFil: Ponce, Alejandra Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Ingeniería En Alimentos; ArgentinaFil: Moreira, Maria del Rosario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Ingeniería En Alimentos; ArgentinaFil: Roura, Sara Ines. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Departamento de Ingeniería Química. Grupo de Investigación en Ingeniería En Alimentos; ArgentinaFil: Ayala Zavala, Jesús Fernando. Centro de Investigación en Alimentación y Desarrollo. Hermosillo; Méxic

Deposition and Photocatalytic Activity of Ag:V2O5 Thin Films

In this work, the deposition and photocatalytic response of V2O5 thin films modified with different amounts of Ag (Ag:V2O5) is reported. Films were deposited on glass and silicon substrates (100), using the pulsed laser deposition (PLD) technique. A high purity vanadium target, with a different number of silver pellets attached on it were used. Thin films were characterized by energy dispersive spectroscopy (EDS) to determine the elemental chemical composition; structural changes due to the addition of Ag were monitored by Raman spectroscopy; Optical microscopy was used to observe the surface morphology and UV-Vis spectroscopy was employed to determine optical properties. Photocatalytic response of the prepared films was studied through the degradation of a malachite green solution using a solar irradiation source.Authors thank to the CONACyT project CB-168827