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Search Results: 1 - 10 of 212213 matches for " Raúl; Valencia Posadas "
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Genetic polymorphism of the αs1-casein locus in five populations of goats from Mexico
Torres-Vázquez,José Antonio; Vázquez Flores,Felícitas; Montaldo,Hugo H; Ulloa-Arvizu,Raúl; Valencia Posadas,Mauricio; Gayosso Vázquez,Amanda; Alonso Morales,Rogelio Alejandro;
Electronic Journal of Biotechnology , 2008,
Abstract: with the objective of estimating allele frequencies, and testing for population divergence for the csn1s1 locus, genotypes of animals from five goat populations; saanen (n = 97), alpine (n = 81) toggenburg (n = 92), local goats with external appearance similar to the murciana-granadina breed from central mexico (n = 26) and heterogeneous local animals denominated mosaico lagunero (n = 30), from northern mexico, were identified using pcr and xmn1 pcr-rflp methodology. for saanen, alpine and toggenburg, the sum of e and f alleles had the largest frequencies (from 0.468 to 0.789), while for the groups local murciana-granadina and mosaico lagunero the sum of the most frequent allelic groups (a* and b*), were 0.385 and 0.533 respectively. both local murciana-granadina and mosaico lagunero populations showed heterozygote excess (p < 0.08). the percentage of the total genetic variation (fst) explained by population differences was 5.16. there was genetic differentiation for most pair comparisons between populations (p < 0.05), excepting for alpine versus toggenburg, and toggenburg versus mosaico lagunero (p > 0.05). for saanen and alpine the frequencies of alleles e and f were similar to the same breeds previously analyzed in europe. therefore there are opportunities of increasing the frequency of the strong alleles for protein content gene assisted selection (gas) in these two breeds. for toggenburg the most frequent allelic groups were f (0.32) and b* (0.21). results indicate differentiation between most populations for this locus. moreover, heterozygote excess in local populations indicated breed admixture.
Estimación de parámetros genéticos para características de longevidad y producción de leche en ganado holstein en México
Valencia Posadas,Mauricio; Ruíz López,Felipe de Jesús; Montaldo Valdenegro,Hugo Horacio;
Interciencia , 2004,
Abstract: data from 47609 cows and pedigree information from 57787 holstein animals, obtained from 1970 to 1997, were used to estimate heritabilities as well as genetic and phenotypic correlations for length of productive life until third lactation (dvp), total milk production until third lactation (pta), stayability to 48 months of age (hp48) and first lactation milk yield (pl1). restricted maximum likelihood procedure was used to estimate the covariance components with uni and bivariate animal models. for dvp, pta and hp48, the model included the effect of herd-year-season of calving, considered fixed, actual 305-day milk production as covariate, and the random effects of animal and error. the model used for pl1 included herd-year-season as fixed effect, and animal and error as random effects. averages for dvp, pta, hp48 and pl1 were 51.4 months, 16469kg, 60% and 7673kg, respectively. heritabilities for dvp, pta, hp48 and pl1 were 0.04, 0.06, 0.03 and 0.25 respectively. all genetic and phenotypic correlations among the studied variables were positive. the genetic and phenotypic correlations obtained between hp48 with dvp and pta were from 0.72 to 0.94. results suggest that hp48 can be used as an early indicator of longevity, that selection on pl1 should be continued because of their economic value, and that some of the longevity traits studied may be included as selection criteria or selection objectives in the improvement programs for holstein cattle in mexico.
Obtención del Valor Genético Predicho en Animales Incluyendo el Efecto del Medio Ambiente Permanente Obtención del Valor Genético Predicho en Animales Incluyendo el Efecto del Medio Ambiente Permanente
Mauricio Valencia Posadas
Acta Universitaria , 2012,
Abstract: The genetic improvement of the animals based in productive records and genealogical information, is a fundamental mechanism to increase the economic income of the commercial farms, through the estimation of the predicted breeding values (VGP’s). The VGP’s allows the identification of animals genetically superior to be used as parents of the next generation. In many parts of the world the best linear unbiased predictor procedure (MPLI) is used as an animal model, for its appropriate properties, to obtain the VGP’s. In these models the permanent environment effect is usually included in order to increase the accuracy of the VGP’s. In this work a developed example is presented using supposed data to obtain VGP’s with the MPLI procedure and an animal model where the methodology, interpretation and use of the VGP’s are shown. El mejoramiento genético de los animales, con base en los registros de rendimiento e información genealógica, es un mecanismo fundamental para incrementar los rendimientos económicos de las explotaciones comerciales, a partir de la estimación de valores genéticos predichos (VGP’s). Los VGP permiten identificar a los animales genéticamente superiores de una forma objetiva, para que sean utilizados como padres de la siguiente generación. En muchas partes del mundo se utiliza el procedimiento del mejor predictor lineal insesgado (MPLI) con un modelo animal por sus adecuadas propiedades para obtenerlos VGP’s. En dichos modelos se suele incluir el efecto del medio ambiente permanente con el objeto de incrementar la precisión de los VGP’s. En este trabajos e presenta un ejemplo desarrollado utilizando datos supuestos para obtener VGP’s con el procedimiento MPLI y un modelo animal, donde se muestra la metodología, interpretación y uso que tienen los VGP’s.
Registros nuevos para la avifauna del estado de Hidalgo, México
Valencia-Herverth, Raúl;Valencia-Herverth, Jorge;Mendoza-Quijano, Fernando;
Revista mexicana de biodiversidad , 2010,
Abstract: six new state records of birds for hidalgo based on field work carried out from august 2006 to october 2007 are presented, and from unpublished records of specimens in the ornithological collection of the instituto tecnológico de huejutla.
Registros nuevos para la avifauna del estado de Hidalgo, México New records for the avifauna of the state of Hidalgo, Mexico
Raúl Valencia-Herverth,Jorge Valencia-Herverth,Fernando Mendoza-Quijano
Revista mexicana de biodiversidad , 2010,
Abstract: Se presentan 6 registros nuevos de aves para el estado de Hidalgo que se obtuvieron durante el trabajo de campo realizado de agosto 2006 a octubre 2007 y de registros no publicados de especímenes de la Colección Ornitológica del Instituto Tecnológico de Huejutla. Six new state records of birds for Hidalgo based on field work carried out from August 2006 to October 2007 are presented, and from unpublished records of specimens in the Ornithological Collection of the Instituto Tecnológico de Huejutla.
Genomic Organization of Purinergic P2X Receptors  [PDF]
Raúl Loera-Valencia, Josué Obed Jaramillo-Polanco, Andrómeda Linan-Rico, María Guadalupe Nieto Pescador, Juan Francisco Jiménez Bremont, Carlos Barajas-López
Pharmacology & Pharmacy (PP) , 2015, DOI: 10.4236/pp.2015.68036
Abstract: Purinergic P2X receptors are a family of ligand-gated cationic channels activated by extracellular ATP. P2X subunit protein sequences are highly conserved between vertebrate species. However, they can generate a great diversity of coding splicing variants to fulfill several roles in mammalian physiology. Despite intensive research in P2X expression in both central and peripheral nervous system, there is little information about their homology, genomic structure and other key features that can help to develop selective drugs or regulatory strategies of pharmacological value which are lacking today. In order to obtain clues on mammalian P2X diversity, we have performed a bioinformatics analysis of the coding regions and introns of the seven P2X subunits present in human, simian, dog, mouse, rat and zebrafish. Here we report the arrangements of exon and intron sequences, considering its number, size, phase and placement; proposing some ideas about the gain and loss of exons and retention of introns. Taken together, these evidences show traits that can be used to gain insight into the evolutionary history of vertebrate P2X receptors and better understand the diversity of subunits coding the purinergic signaling in mammals.
Cagnasso,Carolina Elisa; López,Laura Beatriz; Binaghi,María Julieta; Pellegrino,Néstor Raúl; Valencia,Mirta Eva;
Revista chilena de nutrición , 2010, DOI: 10.4067/S0717-75182010000200001
Abstract: iron (fe) and zinc (zn) dialyzability was compared in 7 commercial ready-to-eat breakfast cereals (bc). four of them were fortified with elemental fe and zno. fe and zn dialyzability of 3 different types of bc fortified with zno and fena2edta or feso4 was also performed in our laboratory. an in vitro methodology that measures the percentage of mineral dialyzability (d%) with controlled ph was used. the dfe% values obtained for the commercially fortified bc ranged between 0.4 to 15.0% without milk and between 1.0 to 5.6% when milk was added to the cereals. in the case of zn, the values ranged from 3.3 to 16.1 without milk and between 3.3 and 30.8 when milk was added. almost every bc that was experimentally fortified in our laboratory presented a higher dfe% (19.5 to 28.6%) and dzn% (12.4 to 29.2) when fortified with fena2edta (with or without milk). the results obtained suggest that fena2edta is a viable alternative for the fortification of bc.
Pericias psicológicas y otros medios probatorios de las decisiones en las comisarías de familia de Bogotá: casos de violencia de pareja contra la mujer
Ospino Rodríguez,Martha Stella; Vidal Padilla,Claudia Victoria; Valencia,Olga Lucía; Oyuela-Vargas,Raúl;
Diversitas: Perspectivas en Psicología , 2012,
Abstract: this study aimed to establish the association of the forensic psychological evaluation and other evidences to the decision making process by judicial operators in administrative family courts in bogotá, through a research with a transversal descriptive cut analytical design on 47 women, victims of partner violence, who sought protective measures at the integral care center against domestic violence (cavif). analyzing the final protective measures imposed in 16 administrative family courts on bogotá, the results showed no association between the use of forensic psychological evaluations, expert's concept of nonfatal injuries from the national institute of legal medicine and forensic sciences (inmlcf), social forensic report, legal complaint, witness testimony and the decisions made by the family commissioner. the only association found was between acceptance of charges and approval decisions for settlement's agreements, as well as with the party's injunction to non-aggression.
Complicaciones de cirugía bariátrica. Hernia interna: una condición potencialmente fatal: Reporte de un caso y revisión de la literatura
Ca?adas,Raúl; Lombana,Luis Jorge; Hernández,Javier; Solano,Claudia; Suárez,Yanette; Torres,Diana; Alvarado,Jaime; Valencia,William; García,Jairo; Hani,Albis;
Revista Colombiana de Gastroenterologia , 2007,
Abstract: in recent years, obesity (defined as body mass index > 30 kg/m2) has increased its prevalence reaching epidemic levels in countries such as the united states where it has became a national health issue. in colombia the obesity prevalence is figured around 14%. treatment options for obesity include life style modifications, pharmacologist management and surgical approach (bariatric surgery). this article describes a patient with previous bariatric surgery, who presents abdominal pain and melena owed to isquemic process of the alimentary limb caused by an internal hernia which is a potentially lethal condition if it is not highly suspected allowing its early diagnosis and treatment
Tumor carcinoide hepático difuso asociado a falla hepática: Reporte de un caso y revisión de la literatura
García,Jairo; Valencia,William; Suárez,Yanette; Hani de Ardila,Albis; Alvarado Bestene,Jaime; Rodríguez,Alberto; Solano,Claudia; Ca?adas,Raúl; Hernández,Javier;
Revista Colombiana de Gastroenterologia , 2006,
Abstract: the carcinoid tumor can compromise the liver in a primary form (tchp) or with metastases of distant place. both presentations are generally solitary or multiple tumors but the presentation diffuse is very unusual. as well, there are few reports that relate these tumors with hepatic acute insufficiency.
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