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Search Results: 1 - 10 of 11794 matches for " Rogelio Alonso; Herrera Haro "
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Efecto de genes candidatos sobre características reproductivas de hembras porcinas
Hernández López,Silvia Hortencia; Lemus Flores,Clemente; Morales,Rogelio Alonso; Herrera Haro,José Guadalupe;
Revista Científica , 2006,
Abstract: candidate genes were studied for litter size in 300 sows yorkshire-landrace; esr, prlr, rbp4 y fut1. the sows were grouped in two levels of production (lp): high level (hl) and low level (ll). using chi-square test the alleles and genotypic frequencies were analyzed. employing analysis of variance with an mixed model effects for the total number born (tnb), number of piglets born alive (nba), number of piglets alive at weaning (nw), total weight of piglets born (wtnb), total weight of piglets alive at weaning (wnw) and breeding value sow productivity (bvsp). the means were compared by orthogonal contrasts. the sows with high production were associated with a higher frequency of b allele of esr gene (p < 0.05). the differences were of 0.04 nba, 0.3 nw, 2.9 wnw kg and 8.6 bvsp points to favor of ab genotype of esr gene (p < 0.05) without considering the lp and no homozygous bb animal was detected. the alleles and genotypic frequencies of prlr gene were not related with the lp (p > 0.05), did not have differences (p > 0.05) between the genotypes aa, ab and bb without considering the lp, neither within of same lp. in the rbp4 gene the frequency of a allele and the aa genotype was higher in sows with hl (p < 0.05), no homozygous bb animals were detected. the sows with aa genotype had 0.5 tnb, 0.5 nba, 0.6 wtnb kg, 2.6 wnw kg and 3.2 bvsp points more than sows with ab genotype (p < 0.05), without considering the lp. the frequency of g allele and gg genotype of fut1 gene was higher in the hl (p < 0.05). the gg genotype was higher than ag genotype with 0.6 tnb, 0.8 wtnb kg, 3.0 wnw kg and 3.9 bvsp points more (p < 0.05), without considering the lp
Calidad de la leche cruda en unidades de producción familiar del sur de Ciudad de México Raw milk quality produced in small dairy farms in the South of Mexico City
G álvarez-Fuentes,JG Herrera-Haro,G Alonso-Bastida,A Barreras-Serrano
Archivos de medicina veterinaria , 2012,
Abstract: Las explotaciones lecheras en peque a escala enfrentan el desafío de producir leche en cantidad y calidad que propicie una mayor demanda del consumidor y una adecuada transformación en quesos, dulces o yogures, asegurando su rentabilidad. Se realizó un estudio para evaluar la calidad de la leche cruda, según la norma PROY-NOM-155-SCFI-2003, tomada de los recipientes de almacenamiento sin refrigeración, basado en una muestra de 30 unidades de producción localizadas en el sur de Ciudad de México, las cuales fueron evaluadas en tres épocas del a o (seca, lluvias e invierno) y clasificadas por el tipo de manejo de la limpieza de la ubre (tradicional, parcial y completo). Los resultados mostraron que los componentes nutricionales (grasa, proteína, caseína) y propiedades fisicoquímicas de la leche (pH, acidez, punto crioscópico) fueron diferentes según la época de muestreo (P < 0,05), al igual que las bacterias mesofílicas (ufc) y el conteo de células somáticas (CCS); mientras que la lactosa, sólidos totales, sólidos no grasos, densidad y reductasa no mostraron cambios (P < 0,05). Durante el invierno, la limpieza completa propició un menor conteo de células somáticas y mayores lecturas de reductasa (P < 0,05) comparadas con las épocas seca y de lluvias. Se concluye que los componentes nutricionales y fisicoquímicos de la leche en las unidades de producción familiar se encuentran dentro de los valores establecidos por la norma oficial mexicana para leche cruda, pero su calidad higiénica es deficiente, consecuencia de inadecuadas prácticas de higiene de la orde a. The small-scale dairy farms are challenged to produce milk in a specific quantity and quality that encourages greater consumer demand and an appropriate transformation into cheese, yoghurt and candy, ensuring profitability. A study to assess the quality of raw milk stored in containers without cooling system was carried out in 30 production units located in the south of Mexico City, according to the standard PROY-NOM-155-SCFI-2003. The production units were evaluated during three seasons (dry, rainy and winter) and classified by the type of procedures for cleaning the udder, before milking (traditional, full and partial). The results showed that the milk component (fat, protein, casein, pH, acidity and cryoscopic point) were different depending on the time of sampling (P < 0.05), as well as mesophilic bacteria and somatic cell count (CCS), while lactose, total solids, non fat solids, density and reductase time showed no change (P > 0.05). During winter, a deep cleaning produced lower CCS and higher re
Growth,Morphometry and Reproductive Performance of Creole Cuino Pigs in Mexico
C. Lemus-Flores,R. Alonso Morales,J.G. Herrera Haro,M. Alonso-Spilsbury,R. Ram?rez-Necoechea,D. Mota-Rojas
Journal of Animal and Veterinary Advances , 2012,
Abstract: Several biotypes of the Mexicanc creole pig are in danger of extinction. This study was carried out in order to characterize the Mexican cuino pig. Growth, morphometry and reproductive traits are statistically described analysing the reproductive performance of 12 Cuino sows kept under confinement conditions. Average live weight was monitored at birth and 6 months later (0.86 and 43.84 kg, respectively). Results show that Cuino pigs tend to deposit more backfat than commercial breeds, their growth rhythm was adjusted to a polynomial equation (Y = 1.1138x2 - 4.0804x + 5.1355 R2 = 0.9955); it is slow at the beginning and after 91 days animals showed an accelerated growth. Average daily feed intake increased until pigs were five months old, from 0.403 to 1.930 kg., with an improved polynomial adjustment (Y = 0.2363x2 - 1.3129x + 5.7951 R2 = 0.82). Feed conversion was 4.596 in the first post-weaning month and 5.174 in the last month of fattening at 6 months. Cuino pigs are small, with short snout and a small number of teats. The variation in all the measured morphological variables was low (7.5 to 16.7%), this suggests that their morphology does not vary much. Prolificity of these pigs was low; the average number of pigs born alive was 4.95 with a litter birth weight of 4.35 kg and 4.12 weaned pigs with 16.09 kg at weaning. Present results indicate that the cuino pig has not been genetically improved since the time it has been in Mexico.
El laboratorio de electromiografía en un centro de rehabilitación
GONZALEZ ROIG,JORGE LUIS; LASONCEL HERRERA,ROGELIO;
Revista Cubana de Ortopedia y Traumatolog?-a , 1995,
Abstract: se analiza la información contenida en los modelos de recolección de datos de 3 242 pacientes atendidos en el laboratorio de electromiografía del hospital de rehabilitación "julio díaz", durante los a?os comprendidos entre 1990 y 1993, ambos inclusive. los datos se reorganizan según sexo, edad, procedencia y diagnóstico de los pacientes, con predominio del sexo masculino, el grupo de edad de 41 a 50 a?os, los que procedían de otros centros y los diagnósticos de radiculoplexopatía y neuropatía. los exámenes más frecuentemente realizados fueron el electromiograma, los estudios de conducción nerviosa periférica motora y sensitiva y los potenciales evocados somatosensoriales. en el 98,0 % de los pacientes, los estudios realizados fueron compatibles con el diagnóstico clínico preliminar. el nivel de cobertura del servicio del laboratorio, en los pacientes hospitalizados con diagnósticos tributarios de estos exámenes, fue del 69,3 %. los estudios electrofisiológicos, además de la ayuda diagnóstica, permiten seguir el curso evolutivo de las afecciones bajo tratamiento y evaluar los resultados de las medidas terapéuticas aplicadas.
El laboratorio de electromiografía en un centro de rehabilitación
GONZALEZ ROIG,JORGE LUIS; LASONCEL HERRERA,ROGELIO;
Revista Cubana de Ortopedia y Traumatolog?-a , 1996,
Abstract: the information included in data collection forms of 3 242 patients cared for at the electromyographic lab from "julio díaz" rehabilitation hospital between 1990 and 1993, bouth included, is analized. data were reorganized by sex, age, origin and diagnosis of the patients. male sex and the age group of 41-50 years, as well as patients from other centers and the diagnosis of neuropathy and radiculoplexopathy were found to be predominant. the most frequent examinations performed were electromyogram, studies of sensitive, motor peripheral nervous conduction, and somatosensory evoked potentials. in 98,0 % of patients, the studies conducted were consistent with the preliminary clinical diagnosis. the level of coverage of laboratory service for hospitalized patients with diagnosis established by the above mentioned examinations was 69,3 %. electrophysiologic studies, besides being a diagnostic aid, allow for the follow-up of the clinical course of the diseases under treatment and for the evaluation of the results from therapeutic measures applied.
El laboratorio de electromiografía en un centro de rehabilitación
JORGE LUIS GONZALEZ ROIG,ROGELIO LASONCEL HERRERA
Revista Cubana de Ortopedia y Traumatolog?-a , 1995,
Abstract: Se analiza la información contenida en los modelos de recolección de datos de 3 242 pacientes atendidos en el Laboratorio de Electromiografía del Hospital de Rehabilitación "Julio Díaz", durante los a os comprendidos entre 1990 y 1993, ambos inclusive. Los datos se reorganizan según sexo, edad, procedencia y diagnóstico de los pacientes, con predominio del sexo masculino, el grupo de edad de 41 a 50 a os, los que procedían de otros centros y los diagnósticos de radiculoplexopatía y neuropatía. Los exámenes más frecuentemente realizados fueron el electromiograma, los estudios de conducción nerviosa periférica motora y sensitiva y los potenciales evocados somatosensoriales. En el 98,0 % de los pacientes, los estudios realizados fueron compatibles con el diagnóstico clínico preliminar. El nivel de cobertura del servicio del Laboratorio, en los pacientes hospitalizados con diagnósticos tributarios de estos exámenes, fue del 69,3 %. Los estudios electrofisiológicos, además de la ayuda diagnóstica, permiten seguir el curso evolutivo de las afecciones bajo tratamiento y evaluar los resultados de las medidas terapéuticas aplicadas.
Zipf's Law in Short-Time Timbral Codings of Speech, Music, and Environmental Sound Signals
Martín Haro, Joan Serrà, Perfecto Herrera, álvaro Corral
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0033993
Abstract: Timbre is a key perceptual feature that allows discrimination between different sounds. Timbral sensations are highly dependent on the temporal evolution of the power spectrum of an audio signal. In order to quantitatively characterize such sensations, the shape of the power spectrum has to be encoded in a way that preserves certain physical and perceptual properties. Therefore, it is common practice to encode short-time power spectra using psychoacoustical frequency scales. In this paper, we study and characterize the statistical properties of such encodings, here called timbral code-words. In particular, we report on rank-frequency distributions of timbral code-words extracted from 740 hours of audio coming from disparate sources such as speech, music, and environmental sounds. Analogously to text corpora, we find a heavy-tailed Zipfian distribution with exponent close to one. Importantly, this distribution is found independently of different encoding decisions and regardless of the audio source. Further analysis on the intrinsic characteristics of most and least frequent code-words reveals that the most frequent code-words tend to have a more homogeneous structure. We also find that speech and music databases have specific, distinctive code-words while, in the case of the environmental sounds, this database-specific code-words are not present. Finally, we find that a Yule-Simon process with memory provides a reasonable quantitative approximation for our data, suggesting the existence of a common simple generative mechanism for all considered sound sources.
Caracterización molecular de aislamientos mexicanos del virus de la anemia infecciosa del pollo, a través del polimorfismo...
Néstor Ledesma Martínez,Tamas Fehervari,Rogelio Alonso
Veterinaria México , 2007,
Abstract: La anemia infecciosa del pollo es una de las enfermedades inmunodepresoras más frecuentes de las aves domésticas. El agente causal es un Gyrovirus. Se identifi caron 30 muestras de virus de anemia infecciosa mediante la amplifi cación por PCR de un fragmento de 675 bp, correspondiente al extremo aminoterminal del gen de la proteína VPI. Los fragmentos amplifi cados fueron caracterizados mediante el polimorfi smo en la longitud de los fragmentos de restricción, utilizando las endonucleasas HaeIII, HinfI y HpaII. De las 30 muestras, 12 se clasifi caron en cuatro grupos virales previamente descritos, mientras que las 18 restantes formaron seis grupos más, algunos de ellos nuevos. Estos resultados indican que la variabilidad genética de los virus de anemia infecciosa es amplia e incluye tipos virales similares a otras regiones del mundo y variantes locales nuevas.
A Study of the Optimum Lot Size and the Newsboy Problem Under Random Demands
Sira Allende Alonso,Carlos Bouza Herrera
Economic Analysis Working Papers , 2004,
Abstract: The determination of the optimum lot size is a stochastic problem because of the randomness of the demands. The usual approaches consider that the involved distributions are known. We consider the case in which they are unknown. The optimization problem is probabilistic constraint program. The demands are modeled by an autoregressive process and the needed quantiles are derived. The newsboy problem is revisited using the derived results.
Seville City Hall Chapter Room ceiling decoration
A., Durán,Robador, M. D.,Jiménez de Haro, M. C.,Herrera, L. K.
Materiales de Construccion , 2010,
Abstract: The present article describes a chemical and physical study of the colour, chemical composition and mineral phases of the decorative materials in the Seville City Hall Chapter House ceiling. The findings showed that the inner most layer of material, calcite, was covered with white lead, in turn concealed under a layer of gilded bole. The ceiling underwent re-gilding, also over bole, due in all likelihood to wear on the original gold leaf. In the nineteenth century, the entire ceiling with the exception of the inscriptions was whitewashed with calcite and white lead. Silver was employed on King John I’s sword (coffer 27). Gold leaf was used to adorn the royal attributes: crowns, belts, sceptres, swords and rosary beads. The high reliefs were likewise gilded. The pigments identified on the ceiling adornments included azurite, malachite, vermilion and gas black. A lime and ground dolomite mortar was used throughout. El objetivo de este trabajo es el estudio de diferentes aspectos, como el color, la composición química y las fases mineralógicas presentes en los diferentes materiales que forman la ornamentación del techo de la Sala Capitular del Ayuntamiento de Sevilla, mediante métodos físicos y químicos. Nuestros resultados muestran que el dorado fue realizado sobre una capa de bol previamente depositada sobre una lámina de blanco de plomo que cubría un estrato de calcita. Posteriormente, y probablemente debido a alteraciones en el dorado original, el techo fue de nuevo dorado usando una técnica similar. En el siglo XIX, casi todo el techo, excepto las zonas con inscripciones, fue blanqueado usando una mezcla de calcita y blanco de plomo. Se empleó plata para cubrir la espada del rey Juan I (casetón 27). Finísimas láminas de oro se usaron para decorar los atributos reales: coronas, cinturones, cetros, espadas y rosarios. En diferentes partes de la decoración fueron detectados pigmentos como azurita, malaquita, bermellón y negro de humo. La composición del mortero de la estructura era a base de cal y dolomita molida.
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