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Search Results: 1 - 10 of 726277 matches for " Raúl de Jesús;Díaz "
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Effect of Regulated Deficit Irrigation on Productivity, Quality and Water Use in Olive cv “Manzanilla”  [PDF]
Raúl Leonel Grijalva-Contreras, Rubén Macías-Duarte, Gerardo Martínez-Díaz, Fabián Robles-Contreras, Manuel de Jesús Valenzuela-Ruiz, Fidel Nu?ez-Ramírez
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.412A3013
Abstract:

The objective of this experiment was to determine the effect of different regulated deficit irrigation (RDI) strategies on productivity, oil quality and water-use efficiency on olive grown in the Sonoran Desert. The experiments were carried out in 2009 and 2010, and in a ten years old traditional (10 × 5 m) “Manzanilla” olive orchard. The control treatment was irrigated at 100% ETc during the whole season while RDI treatments were applied at 75% ETc or 50% ETc. The two RDI were applied during two phenological stages: at postharvest to evaluate the effect on table olive or from pit hardening to harvest to evaluate the effect on oil olive. Our results indicated that RDI applying 50% ETc during postharvest period reduced significantly fruit set and table olive yield, while applied during pit hardening to harvest period, it decreased oil yield but increased oil content. The RDI applying an ETc of 75% during the postharvest period gave similar table olive yield to the control, and applied form of pit hardening to harvest also gave similar oil yield to the control. The RDI using an ETc of 75% resulted in the highest water-use efficiency for oil or table olive production.

Interacciones económico-financieras Brasil-México: ?cuál es su grado de integración?
Morales, Ma. Esther;Mejía, Pablo;Gutiérrez, Raúl de Jesús;Díaz, Miguel ángel;Vergara, Reyna;
Perfiles latinoamericanos , 2012,
Abstract: this paper analyzes trade and financial transactions between brazil and mexico in order to evaluate the magnitude of their reciprocal integration. our results suggest that both countries have successfully got inserted into the international economy, which can be observed in their high volumes of trade, in their receiving foreign direct investment and in the size of their capital markets, as well as in the magnitude of their association with the most important countries and financial centers throughout the world. however, even if their bi-na-tional trade and financial integration has notably increased, especially after the economic complementation agreements came into force in 2003 and due to the "translatinization" of brazilian and mexican firms, the magnitude of their reciprocal trade and financial transactions remains at very low relative levels, a situation that may significantly change in the framework of a possible strategic agreement of economic integration between these two countries.
Análisis de las depreciaciones extremas del tipo de cambio de México a partir del Proceso Poisson No Homogéneo
Miguel ángel Díaz Carre?o,Raúl de Jesús Gutiérrez,María Teresa Herrera Nebel
Ciencia Ergo Sum , 2011,
Abstract: Se presenta una modelación estadística de las depreciaciones extremas del tipo de cambio nominal del peso mexicano frente al dólar estadounidense a partir de la validación del supuesto de Proceso de Poisson No Homogéneo (PPNH) en el periodo 1990-2010. Los resultados empíricos muestran fuerte evidencia que para incrementos del tipo de cambio mensual mayores a 2.0%, el empleo del ppnh es adecuado, no así para otros niveles de aumento. Además utilizando una función de valor medio del ppnh tipo Weibull se encontró que la probabilidad de ocurrencia de una depreciación superior a 2.0% en un mes es de 33% y en un trimestre de 67%.
Melanosis neurocutánea con hidrocefalia obstructiva: A propósito de un caso
Vi?as Díaz,José A; Pérez,Raúl A; Pérez de la Cruz,Reinaldo; Juan Rodríguez,Jesús A;
Revista de Ciencias M??dicas de Pinar del R?-o , 2009,
Abstract: background: this rare melonocytic hamartoma of the skin and leptomeninges was first described by vichow in 1859 and named neurocutaneous melanosis by von bogaert in 1948. clinically, it is recognised due to the presence in the skin of dark pigmented, thick and pilose nevi spread like a "seat bath" (hypogastric region, buttocks, the upper part of the thighs), having neurological disorders which are expressed by hydrocephaly, seizures and mental retardation. the risk of malignancy in the nevi is observed. the majority of the cases are sporadic, though a pattern of autosomal dominant heredity with a variable expression (mim: 249400) is suggested. case report: a six-months female patient, born from the fourth pregnancy, in term, normal weight and having young no consanguineous parents and a negative familial history of genetic defects was treated in the neurosurgical consultation. in the physical examination multiple pigmented nevi were observed with a distribution and features which matched with a neurocutaneous melanosis; starting from the two months of age, the anterior fontanel was tense and a sudden growing of the cephalic perimeter was observed; confirming with cat-scan an obstructive hydrocephaly which showed a marked dilatation of the 3rd and 4th ventricles of the brain; this was the reason, to perform by means of a neurosurgery a csf ventriculoperitoneal shunt. a marked retardation of the psychomotor development was observed, dying at 13 months of age. conclusion: neurocutaneous melanosis associated with an obstructive hydrocephaly due to a diffuse melanosis of the central nervous system (cns).
Melanosis neurocutánea con hidrocefalia obstructiva: A propósito de un caso Neurocutaneous Melanosis with Obstructive Hydrocephaly: A Case Report
José A Vi?as Díaz,Raúl A Pérez,Reinaldo Pérez de la Cruz,Jesús A Juan Rodríguez
Revista de Ciencias M??dicas de Pinar del R?-o , 2009,
Abstract: Antecedentes. Esta rara hamartomatosis melanocítica de la piel y leptomeninges fue descrita por Vichow en 1859 y nombrada como Melanosis Neurocutanea por Von Bogaert en 1948. Puede reconocerse clínicamente por la presencia en la piel de nevus pigmentados de color oscuro, gruesos y pilosos, repartidos en forma "de Ba o de asiento" (hipogastrio, nalgas y parte superior de los muslos) con manifestaciones neurológicas expresadas por hidrocefalia, convulsiones y retraso mental. Existe elevado riesgo de malignización de los nevus. La mayoría de los casos son esporádicos, aunque se ha sugerido un patrón de herencia autosómico dominante con expresividad variable (MIM: 249400). Presentación de caso. Paciente femenina de 6 meses de edad, producto de cuarta gestación, a término, normopeso, padres jóvenes no consanguíneos e historia familiar negativo de defecto congénitos. En la exploración física se comprobaron múltiples nevus pigmentados con al distribución y característica de una Melanosis Neurocutánea; a partir de los dos meses se comprobaron fontanela anterior tensa y rápido crecimiento del perímetro cefálico confirmado por TAC una hidrocefalia obstructiva con marcada dilatación de III y IV ventrículo motivo por el cual le fue realizada por Neurocirugía una derivación de LCR ventrículo-peritoneal. Evoluciona con un marcado retraso en el desarrollo psicomotor. Fallece a la edad de 13 meses. Conclusión. Melanosis Neurocutánea asociada a Hidrocefalia obstructiva por Melanosis difusa del S.N.C. Background: This rare melonocytic hamartoma of the skin and leptomeninges was first described by Vichow in 1859 and named Neurocutaneous Melanosis by Von Bogaert in 1948. Clinically, it is recognised due to the presence in the skin of dark pigmented, thick and pilose nevi spread like a "seat bath" (hypogastric region, buttocks, the upper part of the thighs), having neurological disorders which are expressed by hydrocephaly, seizures and mental retardation. The risk of malignancy in the nevi is observed. The majority of the cases are sporadic, though a pattern of autosomal dominant heredity with a variable expression (MIM: 249400) is suggested. Case Report: A six-months female patient, born from the fourth pregnancy, in term, normal weight and having young no consanguineous parents and a negative familial history of genetic defects was treated in the neurosurgical consultation. In the physical examination multiple pigmented nevi were observed with a distribution and features which matched with a Neurocutaneous Melanosis; starting from the two months of age, the anterior font
Sinus elevation by in situ utilization of bone scrapers: technique and results
Martos Díaz,Pedro; Naval Gías,Luis; Sastre Pérez,Jesús; González García,Raúl; Bances del Castillo,Fernando; Mancha de la Plata,María; Galindo Moreno,Pablo; Mu?oz Guerra,Mario;
Medicina Oral, Patología Oral y Cirugía Bucal (Internet) , 2007,
Abstract: objectives: the objective was to present a novel technique for antrostomy performed before sinus elevation in atrophic maxilla for subsequent implant placement. material and methods: the study included 10 sinus elevations performed by the proposed technique in nine consecutive patients presenting with inadequate posterior maxillary height. the technique is described, calculating the antrostomy surface area, volume of bone tissue obtained and final height attained in each case. a total of 16 implants were placed. results: all ten elevations were accomplished. mean antrostomy surface area was 0.55 mm2, mean bone volume obtained was 0.56 cm3 and mean height attained was 11.7 mm from a baseline mean height of 5.6 mm. out of the 16 implants, 14 were inserted immediately after the elevation and 2 were inserted in a second step, after ossification; 93.7% of the implants were osseointegrated at 6 months after prosthesis placement. conclusion: the use of bone scrapers to create antrostomy for sinus elevation is a simple and very safe procedure. it provides a variable amount of particulate bone graft that is easily handled and highly useful for packing the cavity that will elevate the sinus membrane.
Association analysis of COMT polymorphisms and Schizophrenia in a Cuban family sample. Preliminary results
Camacho,Hanlet; Nazabal,Marcelo; Domínguez,Mayelín; Mendoza,Raúl; Leal,Lester; Roca,Juan; García,Alexander; Benítez,Jesús; Fernández de Cossío,María E; Villarreal,Adelaida; Cintado,Alberto; Ferrer,Annia; Due?as,Marta; Díaz,Tamara; Casalvilla,Racmar; Martín,Migdyrai; Novoa,Lidia I;
Biotecnolog?-a Aplicada , 2011,
Abstract: schizophrenia is a complex disease affecting as much as 1% of the global population, constituting the target of considerable effort to identify disease susceptibility genes. several lines of evidence point to the catechol-o-methyltransferase (comt) gene as a schizophrenia susceptibility candidate, not only because it encodes a key dopamine catabolic enzyme but also because it maps to the velocardiofacial syndrome region of chromosome 22q11, which has long been associated with predisposition to the disease. several case-control and family-based studies have been conducted to examine the possible association of comt with this disorder; however, these studies have produced conflicting results. to further assess the genetic contribution of comt variants to schizophrenia susceptibility, three single-nucleotide polymorphisms (rs2075507, rs4680 and rs362204) were investigated in a sample of 74 family trios from the cuban population. restriction fragment length polymorphism was used to identify the allelic variants, employing statistical tools based on transmission disequilibrium tests to find possible associations. in this study, the first of its type performed in the cuban population, we found an association of rs2075507 and rs362204 at allelic levels with a p < 0.05; also finding an association of haplotype 1-2-1 with the disease.
Dose of Paclobutrazol in the Growth of Sugarcane Seedlings in Vitro in the Acclimatization Stage  [PDF]
Tomás Díaz Valdés, Leopoldo Partida Ruvalcaba, Felipe Ayala Tafoya, Carlos Alfonso López Orona, Teresa de Jesús Velázquez Alcaraz
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.88056
Abstract: Micropropagation has been widely used for the rapid multiplication of many plant species, where the final quality of the plant depends on the acclimatization stage. To obtain compact plants, with desired characteristics and adaptable to field conditions, the use of chemical inhibitors of growth is necessary. In sugarcane of the variety CP 72-2086 the effects caused by the growth regulator paclobutrazol (PBZ) in vitro plants applied in the acclimatization phase are unknown. The objective of this research was to know the effect of paclobutrazol in the acclimatization phase in the growth and development of the vitro plants of sugarcane of the variety CP 72-2086. The research was carried out in the greenhouse of the Faculty of Agronomy of the Autonomous University of Sinaloa, located at 24°37'29\"N and 107°26'36\"W, in Sinaloa, Mexico. Micro-propagated sugarcane seedlings were used by tissue culture; vitro plants were extracted from the flasks 24 hours before being transplanted into the greenhouse. The treatments of PBZ applied were the doses of 0 (control), 100, 150, 200, 250 and 300 mg·L-1. The PBZ was applied when the seedlings had seven true leaves [(31 days after transplant (ddt)], and did not show gutting. At 36 ddt, the vitro plants of the trays were extracted and the variables evaluated were height (cm), stem diameter (mm), root length (cm), root volume (mL), root dry weight (g), aerial biomass dry weight (g), leaf area (cm2) and greenness in spad units. A randomized complete block design with three replicates was used. The results of the study indicated that the dose of 150 g·L-1 of PBZ induced the growth of plants more compact and of better quality for the transplant.
Síndrome de Brugada. Brugada syndrome.
Raúl Díaz-Padrón Camejo,Jesús Castro Hevia,Miguel A. Qui?ones Pérez
Revista Cubana de Cardiología y Cirugía Cardiovascular , 2000,
Abstract: El síndrome de Brugada es una nueva entidad, caracterizada por un aparente bloqueo de rama derecha, elevación del segmento ST, tendencia a presentar arritmias ventriculares malignas (taquicardia ventricular polimórfica y/o fibrilación ventricular) y muerte súbita cardiaca (MSC). El patrón electrocardiográfico puede estar presente, ser intermitente u oculto (solo demostrable con test realizado con Flecainida, Procainamida o Ajmalina). La incidencia en países asiáticos es entre el 0,05 y 0,6 % de la población adulta. El evento arrítmico puede ocurrir en reposo, desencadenado por el stress o sin relación aparente con variaciones del sistema nervioso autónomo. La enfermedad se transmite genéticamente con un patrón autosómico dominante, con predominio en varones, detectándose hasta el momento 3 mutaciones que afectan en diversas vertientes el funcionamiento de los canales de sodio. En los casos que se han realizado estudios anatomopatológicos han resultado negativos. El diagnóstico se realiza en los pacientes con o sin síntomas mediante la detección del electrocardiograma patológico basalmente o con test farmacológico. La recurrencia o la posibilidad de un primer episodio sincopal o de MSC es del 30 % en los primeros 3 a os de realizado el diagnóstico. El pronóstico es fatal si no se implanta un Desfibrilador Automático (DAI) tanto en los que han presentado síntomas como en los asintomáticos que tengan antecedentes familiares de MSC y/o que las arritmias sean inducibles en el laboratorio. Brugada syndrome is a new entity characterized by an apparent right bundle branch block, elevation of the ST segment, a trend toward malignant ventricular arrhytmias (polymorphic ventricular tachycardia and/or ventricular fibrillation) and cardiac sudden death (CSD). The electrocardiographic pattern may be present, intermittent or hidden (it may be only demonstrated by a test with Flecainidine, Procainamide or Ajmaline). The incidence in Asian countries is between 0.05 and 0.6% of the adult population. The arrhytmic event may occur at rest, be caused by stress or have no apparent association with variations of the autonomic nervous system. The disease is genetically transmitted with an autosomal dominant pattern and it prevails among men. 3 mutations affecting in different ways the functioning of the sodium channels have been detected up to now. Those cases in which anatomopathological studies have been conducted have proved to be negative. The diagnosis is made in patients with or without symptoms by the basal detection of pathological electrocardiography or by pharmacolog
Mechano-Synthesized Orthoferrite Starting from Wüstite Assisted by SPS  [PDF]
Claudia Alicia Cortés-Escobedo, Félix Sánchez-De Jesus, Ana María Bolarín-Miró, Sophie Nowak, Elizabeth Piazzini Juárez-Camacho, Sebastián Díaz de la Torre, Raúl Valenzuela
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.43007
Abstract:

Stoichiometric mixtures of FeO and Y2O3 were milled and heat treated to obtain yttrium iron garnet, Y3Fe5O12. Two types of heating systems were used: one, a spark plasma sintering machine and the second, an electrical oven. The magnetic properties of the resulting specimens have been analyzed and discussed as a function of the grain size and the particles’ morphology. The partial formation of garnet and orthoferrite phases was revealed on the obtained powder through microstructural analyses after 9 h of ball milling. The milled powders were transformed into the orthoferrite phase after the SPS-treatment at 700°C and 900°C. Magnetic-saturation studies revealed magnetic responses up to 12.7 emu/g for specimens SPS-treated at 700°C, whereas 2.1 emu/g for samples SPS-treated at 900°C. Conventionally treated specimens at 700°C developed 0.36 emu/g of magnetization, while 0.93 emu/g was registered for those treated at 900°C.

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