Author: Hector Dominguez

Lluvia de semillas en un gradiente sucesional de bosque mesófilo de montaña, en la Reserva de la Biósfera El Triunfo

HECTOR DANIEL GOMEZ DOMINGUEZ (2013)

Los principales problemas que ocasionan la pérdida y fragmentación de los bosques mesófilos de montaña son, la acelerada tasa de transformación de las áreas forestales hacia terrenos agrícolas, plantaciones de café o destinados a la ganadería, la expansión de los asentamientos humanos, así como la extracción de madera en forma de leña o materiales para construcción (Williams- Linera, 1992ª, Collier, 1994; González y Quintanar, 1999). A estos procesos se debe añadir los efectos de fenómenos naturales como las inundaciones, huracanes, deslaves, caída de árboles que aunque son parte de la dinámica del bosque pero que al incrementar su fuerza e incidencia alteran las condiciones micro-ambientales del área (p. ej., mayor radiación solar a todos los niveles verticales de la vegetación, incremento de la temperatura del suelo y aumento de la tasa de evapotranspiración de la humedad, entre las más evidentes) (Ramírez- Marcial et al., 2003). Si este proceso de degradación se da en áreas extensas las repercusiones son mayores ya que se originan cambios en el patrón de circulación del viento y en el ciclo hidrológico (Sauders et al., 1991; Hobbs, 1993) y altera la retención del agua del suelo, produciéndose una mayor escorrentía y eventos de sequia pronunciada, lo cual se hace evidente en el decrecimiento de los cursos de agua, el aumento de la erosión y el transporte de sedimentos a las partes bajas (Sauders et al., 1991).

Master thesis

CultivoReserva de la Biósfera El TriunfoBosque caducifolioBosque mesófilo de montañaSemillas BIOLOGÍA Y QUÍMICA

La batalla de las cruces. Los crímenes contra mujeres en la frontera y sus intérpretes

Hector Dominguez PATRICIA RAVELO BLANCAS (2003)

Este trabajo se enfoca en los discursos que ocupan la arena pública con respecto a la violencia contra mujeres en Ciudad Juárez, Chihuahua, en los últimos diez años. El propósito del mismo es describir a grandes rasgos las diversas hipótesis propuestas por los enunciadores sociales, entre los que se incluyen a las instituciones de los tres niveles de gobierno, la prensa, el medio académico, las ONG, los partidos políticos y las instituciones religiosas. Estos discursos se consideran como actos de habla, traspasando el criterio de verdad o falsedad. Lo que los autores quieren destacar son las condiciones de enunciación, la perspectiva teórica o ideológica que las sustenta, y

su uso como acto político. Este estudio del discurso social de la violencia contra mujeres trata de destacar la manera en que se instrumentaliza la victimización en el campo de las relaciones de poder del contexto fronterizo.

Article

Violencia;mujeres;Ciudad Juárez CIENCIAS SOCIALES SOCIOLOGÍA PROBLEMAS SOCIALES CRIMEN

Medical informatics can improve Mexico’s public health system

Héctor Vázquez Leal Roberto Castañeda Sheissa CARMEN GUILLERMINA BLAZQUEZ DOMINGUEZ Luis Hernández Martínez (2011)

The health system for any country is one of the top priorities to guarantee the proper development for their citizens. For the specific case of Mexico, management of medical records is still being done using physical files whether patient attends a public or private physician or hospital. This poses a potential problem for the health structure and the patient because physical files tend to deteriorate, damage, could be stolen or mishandled. One possibility is to evolve from the use of physical files and create electronic medical records. Mexico already has an official standard for medical records; this standard could serve as the foundation to devise an electronic universal record. The idea for the electronic universal record is to serve as the base to implement an electronic public health scheme. This article will provide several key aspects to take into account in order to provide an efficient, secure and cost efficient electronic medical record. Aspects to be considered include: standardized medical nomenclature, clinical procedures, data transmission standards, legal aspects, electronic security, and data storage schemes. The impact of this proposal for Mexico will be discussed in detail.

Article

Medical informatics Electronic medical record Hospital management system and health informatics CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA FÍSICA ELECTRÓNICA ELECTRÓNICA

Molecular gas and dust in the highly magnified z ∼2.8 galaxy behind the Bullet Cluster

Omar López Cruz WILLIAM FRANK WALL Edgar Castillo Domínguez Héctor Javier Ibarra Medel (2012)

Context. The gravitational magnification provided by massive galaxy clusters makes it possible to probe the physical conditions in distant galaxies that are of lower luminosity than those in blank fields and likely more representative of the bulk of the high-redshift galaxy population.

Aims. We aim to constrain the basic properties of molecular gas in a strongly magnified submm galaxy located behind the massive Bullet Cluster (1E 0657-56). This galaxy (SMMJ0658) is split into three images, with a total magnification factor of almost 100.

Methods. We used the Australia Telescope Compact Array (ATCA) to search for ¹²CO(1–0) and ¹²CO(3–2) line emission from SMMJ0658. We also used the SABOCA bolometer camera on the Atacama Pathfinder EXperiment (APEX) telescope to measure the continuum emission at 350 μm. Results. CO(1–0) and CO(3–2) are detected at 6.8σ and 7.5σ significance when the spectra toward the two brightest images of the galaxy are combined. From the CO(1–0) luminosity we derive a mass of cold molecular gas of (1.8 ± 0.3) × 10⁹ Mꙩ, using the CO to H₂ conversion factor commonly used for luminous infrared galaxies. This is 45 ± 25% of the stellar mass. From the width of the CO lines we derive a dynamical mass within the CO-emitting region L of (1.3 ± 0.4) × 10¹⁰(L/1 kpc) Mꙩ.We refine the redshift determination of SMMJ0658 to z = 2.7793 ± 0.0003. The CO(3–2) to CO(1–0) brightness temperature ratio is 0.56⁺⁰‧²¹₋₀․₁₅, which is similar to the values found in other star-forming galaxies. Continuum emission at 350 μm from SMMJ0658 was detected with SABOCA at a signal-to-noise ratio of 3.6. The flux density is consistent with previous measurements at the same wavelength by the Herschel satellite and BLAST balloon-borne telescope. We study the spectral energy distribution of SMMJ0658 and derive a dust temperature of 33 ± 5 K and a dust mass of 1.1⁺⁰‧⁸₋₀․₃× 10⁷ Mꙩ.

Conclusions. SMMJ0658 is one of the least massive submm galaxies discovered so far. As a likely representative of the bulk of the submm galaxy population, it is a prime target for future observations.

Article

Submillimeter: galaxies Infrared: galaxies Cosmology: observations Gravitational lensing: strong CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA ASTRONOMÍA Y ASTROFÍSICA ASTRONOMÍA Y ASTROFÍSICA

Liking product landscape: going deeper into understanding consumers’ hedonic evaluations

Claudia Sánchez-Gómez Julieta Domínguez-Soberanes Mario Graff Sebastián Gutiérrez Gabriela Sánchez Héctor B. Escalona Buendía (2019)

The use of graphical mapping for understanding the comparison of products based on consumers’ perceptions is beneficial and easy to interpret. Internal preference mapping (IPM) and landscape segmentation analysis (LSA) have successfully been used for this propose. However, including all the consumers’ evaluations in one map, with products’ overall liking and attributes’ perceptions, is complicated; because data is in a high dimensional space some information can be lost. To provide as much information as possible, we propose the liking product landscape (LPL) methodology where several maps are used for representing the consumers’ distribution and evaluations. LPL shows the consumers’ distribution, like LSA, and also it superimposes the consumers’ evaluations. However, instead of superimposing the average overall liking in one map, this methodology uses different maps for each consumer’s evaluation. Two experiments were performed where LPL was used for understanding the consumers’ perceptions and compared with classic methodologies, IPM and cluster analysis, in order to validate the results. LPL can be successfully used for identifying consumers’ segments, consumers’ preferences, recognizing perception of product attributes by consumers’ segments and identifying the attributes that need to be optimized.

JCR del journal reportado al año de publicación del artículo (2019): 4.092

Article

Consumers’ perceptions Data analysis Sensory analysis INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS OTRAS ESPECIALIDADES TECNOLÓGICAS OTRAS OTRAS

Flora, fauna y formaciones vegetales de tres ejidos de la Reserva de la Biosfera Pantanos de Centla, Tabasco, México

MIGUEL ANGEL PEREZ FARRERA MIRNA IVETT MARQUEZ REYNOSO HECTOR DANIEL GOMEZ DOMINGUEZ (2014)

Se realizó una estudio florístico y faunístico en tres ejidos (Lázaro Cárdenas, José María Morelos y Pavón y La Mixteca) en la Reserva de la Biósfera Pantanos de Centla, Tabasco, México. Se registraron 12 formaciones vegetales: Lázaro Cárdenas (8), José María Morelos y Pavón (5) y La Mixteca (5). Estas formaciones albergan 37 especies vegetales que representa el 13.2 % de la flora registrada para la Reserva de la Biosfera Pantanos de Centla, siendo la Ecucotiledóneas y Monocotiledóneas las más abundantes. Se registran 44 especies animales de las cuales 16 son aves, 2 crustáceos, 6 mamíferos, 6 peces y 14 reptiles. Ocho de estas especies registradas, se encuentran bajo protección de la NOM-ECOL-059-2010, con lo cual se destaca que los sitios mencionados en este trabajo son parte importante par a la conservación biológica y ecológica de los pantanos de Centla y el país.

A floristic study were made in three ejidos (Lázaro Cárdenas, José María Morelos y Pavón y La Mixteca) in the Pantanos de Centla biosphere reserve, Tabasco, México. About 12 vegetation types distributed between villages Lázaro Cárdenas (8), José María Morelos y Pavón (5) and La Mixteca (5) were recorded. These vegetation communities maintain approximately 37 species of plans representing about 13.2% of the flora recorded for all Pantanos de Centla Biosphere Reserve. The Ecucotiledons and Monocotyledons were the most abundant. Aproximately 44 species of animals were recorded, including 16 birds, 2 crustaceans, 6 mammals, 6 reptiles and 14 fish. Eight of these recorded species are under protection by Mexican law (NOM-ECOL-059-2010), which emphasizes this zone is important for biological and ecological conservation of this reserve and the country.

Article

riquezavegetación acuáticaavesmamíferosreptilesCentlaTabascoMéxicorichnessaquatic vegetationbirsmammalsreptilianMexico Biología BIOLOGÍA Y QUÍMICA

Contribución a la flora de Chiapas del Herbario Eizi Matuda (hem) de la Escuela de Biología (unicach)

RUBEN MARTINEZ CAMILO MIGUEL ANGEL PEREZ FARRERA NAYELY MARTINEZ MELENDEZ HECTOR DANIEL GOMEZ DOMINGUEZ (2008)

La colección de flora del Herbario Eizi Matuda (hem) contiene 201 familias, 1227 géneros y aproximadamente 3586 especies para el estado de Chiapas. Los grupos taxonómicos mejor representados, tomando como referencia a Breedlove (1981) son las familias Zamiaceae (totalmente representa- das), Arecaceae (72%), Fagaceae (71%), Piperaceae (69%) y Araceae (67%), el género Tillandsia (71%) y el grupo de los helechos y afines (67%). El número total de especies de la colección representa cerca del 42% de la riqueza florística estimada para Chiapas. Algunas novedades de la colección del herbario para la flora de Chiapas incluyen: 2 ejemplares tipo, 22 registros nuevos y 16 especies consideradas como raras, endémicas o amenazadas. De manera adicional, se designan 6 isotipos que se encuentran en la colección y que no fueron reconocidos en la publicación original, destacando el isotipo de Lacandonia schismatica. Finalmente, el hem coadyuva en el conocimiento de la riqueza biológica del estado de Chiapas, mediante la elaboración de inventarios florísticos, enfocándose en áreas geográficas poco exploradas y en grupos vegetales con alguna importancia desde el punto de vista de su conservación.

The collection of flora of Chiapas at the Herbarium Eizi Matuda (hem) contains approximately 3586 species in 1227 genera among 201 families for the state of Chiapas. The groups best represented from a taxonomic point of view, using the Breedlove (1981) reference, are the Zamiaceae (completely represented), Arecaceae (72%), Fagaceae (71%), Piperaceae (69%) and Araceae (67%), the genus Tillandsia (71%) as well as the pteridophytes and affinities (67%). The total number of species in the collection represents nearly 42% of the floristic richness for Chiapas. Some novelties of the collection at the herbarium and for the flora of Chiapas include: two type specimens, 22 new reports and 16 species considered as rare, endemic or threatened. Additionally, there are 6 designated isotypes in the collection that were not mentioned in the original publications, highlighting the isotype of Lacandonia schismatica. Finally, the herbarium hem cooperates to further the knowledge biological richness of the state of Chiapas, through the elaboration of floristic inventories, emphasising the least explored geographical areas and in plant groups of conservation importance.

Article

Riqueza FlorísticaInventario FlorísticoGrupos TaxonómicosIsotiposConservaciónHerbario Eizi MatudaFloristic richnessfloristic inventorytaxonomics groupsIsotypeconservationEizi Matuda herbarium Biología BIOLOGÍA Y QUÍMICA

Molecular Cloning and Variability of a Subolesin Recombinant Peptide from a Mexican Rhipicephalus (Boophilus) Microplus Tick Strain

RODOLFO ESTEBAN LAGUNES QUINTANILLA DELIA INES DOMINGUEZ GARCIA MOISES MARTINEZ VELAZQUEZ HECTOR MANELIC QUIROZ ROMERO RODRIGO ROSARIO CRUZ (2014)

"The cattle tick Rhipicephalus (Boophilus) microplus is the most important health problem for livestock at tropical and subtropical areas. Because of its hematofagous behavior, pathogen transmission, acaricide resistance, environmental impact and public health, new strategies for tick control are required. Vaccines, constitute a cost-effective and environment friendly alter-native. The Bm86 tick antigen, originally identified in R. microplus, is the constituent of the only commercialized anti-tick vaccine. Nowadays, tick subolesin has been considered an important candidate. The aim of this study was to clone and charac-terize a recombinant peptide derived from the gen Sub in order to express it in Escherichia coli. The recombinant peptide was labeled with a polihistidine tag and identified by a monoclonal antibody against the tag after PAGE separation, purified by Ni affinity chromatography, and analyzed by the cluster analysis of variations with regards to ten different tick strains including Mexican ticks. Analysis of variations show, different clusters suggesting regional specific variations among Mexican strains, with probable implications on regional variability on protection efficiency. The tick protective antigen, subolesin, is a promising antigen and the use of immunogenic peptides predicted from in silico analysis approached in this study can be an alternative to improve the efficiency of tick vaccines in the future.".

Article

BIOLOGÍA Y QUÍMICA BIOLOGÍA Y QUÍMICA

Relativistic Rotating Electromagnetic Fields

HECTOR VARGAS RODRIGUEZ Luis Armando Gallegos Infante MIGUEL ANGEL MUÑIZ TORRES Haret Codratian Rosu PAULINO JAVIER DOMINGUEZ CHAVEZ (2020)

"In this work, we consider axially symmetric stationary electromagnetic fields in the framework of special relativity. These fields have an angular momentum density in the reference frame at rest with respect to the axis of symmetry; their Poynting vector form closed integral lines around the symmetry axis. In order to describe the state of motion of the electromagnetic field, two sets of observers are introduced: the inertial set, whose members are at rest with the symmetry axis; and the noninertial set, whose members are rotating around the symmetry axis. The rotating observers measure no Poynting vector, and they are considered as comoving with the electromagnetic field. Using explicit calculations in the covariant splitting formalism, the velocity field of the rotating observers is determined and interpreted as that of the electromagnetic field. The considerations of the rotating observers split in two cases, for pure fields and impure fields, respectively. Moreover, in each case, each family of rotating observers splits in two subcases, due to regions where the electromagnetic field rotates with the speed of light. These regions are generalizations of the light cylinders found around magnetized neutron stars. In both cases, we give the explicit expressions for the corresponding velocity fields. Several examples of relevance in astrophysics and cosmology are presented, such as the rotating point magnetic dipoles and a superposition of a Coulomb electric field with the field of a point magnetic dipole."

Article

Magnetosphere CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA FÍSICA FÍSICA

AISLAMIENTO Y PURIFICACIÓN DEL HONGO ECTOMICORRÍZICO Helvella lacunosa EN DIFERENTES MEDIOS DE CULTIVO

DANIEL DOMINGUEZ ROMERO HECTOR VAZQUEZ RIVERA BASILIO GABRIEL REYES REYES JOSEFA IRENE ARZALUZ REYES ANGEL ROBERTO MARTINEZ CAMPOS (2013)

Helvella lacunosa, besides its mycorrhizal importance for plant forest species, has a high commercial value. The commercial production of H. lacunosa represents two main advantages: Economical benefits for the communities able to produce it; and conservation of biodiversity in the forests by preventing the species overexploitation and maintaining the mushroom-plants micorrhizal relationship. Carrying out this perspective requires, in principle, to isolate the species mycelium, and then to develop the mycorrhizing technique that allows the production of the mushroom. Isolating the mycelium by the first time, however, involves testing several culture media in order to identify the potential requirements for inducing the myceliums growth. In the present work we tested, in laboratory, five different agar-based culture media to isolate H. lacunosas mycelium, and to evaluate its growing rate, analysis of covariance showed that there is a simple linear relationship between incubation time and the diameter. Indicating that the cumulative growth rate of the mycelium, was different between the culture media (F4, 240 = 17,008, p <0.001). The APD medi u m had the highest growth rate followed by AEA. In both growing media, the diameter of the mycelium converges the fifth day. The lowest growth rate was presented in the media AEM and AEP.

Article

Agrociencias Helvella lacunose mycorrhiza isolation culture media mycelium pure culture CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA