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Search Results: 1 - 10 of 123720 matches for " I; Sotomayor-Ramírez "
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SOIL FERTILITY EVALUATION OF COFFEE (Coffea spp.) PRODUCTION SYSTEMS AND MANAGEMENT RECOMMENDATIONS FOR THE BARAHONA PROVINCE, DOMINICAN REPUBLIC
P.A Nú?ez,A Pimentel,I Almonte,D Sotomayor-Ramírez
Journal of Soil Science and Plant Nutrition , 2011,
Abstract: Reported yields in most coffee farms of the Barahona province in the Dominican Republic are relatively low (< 290 kg ha-1 parchment coffee). In general, coffee producers do not use diagnostic techniques such as soil testing. This fact prevents them from identifying the limiting factors (especially nutrients), complicates the work of coffee cultural management practices, and potentially reduces productivity and coffee quality. This study was designed to diagnose the fertility level of soils in coffee farms in the area of Barahona in 96 farms within an area of 637 hectares and design a nutrient management strategy. Soils from each farm were sampled and analyzed for soil fertility parameters. A survey was provided to farmers that permitted the collection of information regarding yields, management practices, and landscape features. Soils in the area were predominantly clayey. Soil pH varied between 4.61 and 7.69 and soil organic matter ranged between 3.29 and 10.9%. Exchangeable potassium levels were classified as deficient in all areas. The clustering of results identified two main components, which accounted for 76% of the variability of the data and the grouping into five communities by similarity of features. The results show that soil testing of this coffee coffee-growing region can be used as a tool to diagnose the soil fertility status and guide them in implementing management and fertilization recommendations.
SOIL FERTILITY EVALUATION OF COFFEE (Coffea spp.) PRODUCTION SYSTEMS AND MANAGEMENT RECOMMENDATIONS FOR THE BARAHONA PROVINCE, DOMINICAN REPUBLIC
Nú?ez,P.A; Pimentel,A; Almonte,I; Sotomayor-Ramírez,D; Martínez,N; Pérez,A; Céspedes,CM;
Journal of soil science and plant nutrition , 2011, DOI: 10.4067/S0718-95162011000100010
Abstract: reported yields in most coffee farms of the barahona province in the dominican republic are relatively low (< 290 kg ha-1 parchment coffee). in general, coffee producers do not use diagnostic techniques such as soil testing. this fact prevents them from identifying the limiting factors (especially nutrients), complicates the work of coffee cultural management practices, and potentially reduces productivity and coffee quality. this study was designed to diagnose the fertility level of soils in coffee farms in the area of barahona in 96 farms within an area of 637 hectares and design a nutrient management strategy. soils from each farm were sampled and analyzed for soil fertility parameters. a survey was provided to farmers that permitted the collection of information regarding yields, management practices, and landscape features. soils in the area were predominantly clayey. soil ph varied between 4.61 and 7.69 and soil organic matter ranged between 3.29 and 10.9%. exchangeable potassium levels were classified as deficient in all areas. the clustering of results identified two main components, which accounted for 76% of the variability of the data and the grouping into five communities by similarity of features. the results show that soil testing of this coffee coffee-growing region can be used as a tool to diagnose the soil fertility status and guide them in implementing management and fertilization recommendations.
El valor de una historia digital en el contexto europeo de aprendizaje integrado a través de la lengua y el contenido
María Dolores Ramírez-Verdugo,María Victoria Sotomayor Sáez
Digital Education Review , 2012,
Abstract: Este artículo se inscribe en el marco de la investigación llevada a cabo desde 2009en el proyecto European CLIL Resource Centre for Web 2.0 Education, uno decuyos objetivos principales es la investigación y desarrollo de recursos digitalespara la ense anza integrada de contenidos y lengua (CLIL) según las directricesde la Unión Europea. Es un proyecto multilingüe y multicultural apoyado en lasposibilidades que ofrece la web 2.0 en cuanto a interactividad, creación yconocimientos compartidos y conectividad, en el sentido más amplio del término.En este marco general, la investigación se ha dirigido a una etapa de educaciónprimaria, la que corresponde a ni os y ni as de 8 a 10 a os, y el trabajo que aquípresentamos recoge una parte del mencionado proyecto y algunos de susresultados iniciales, puesto que se encuentra todavía en fase de desarrollo. Enesta fase inicial del pilotaje en los colegios, se presentó el cuento digital a un totalde 12 profesoras de inglés en contexto CLIL que desarrollan su actividad docenteen seis colegios públicos bilingües de la zona norte de la Comunidad de Madrid.Con el fin de compilar datos objetivos que probasen nuestra hipótesis inicial, estasprofesoras completaron cuestionarios iniciales y finales para su posterior análisis.El resultado obtenido se tendrá en cuenta en el pilotaje ulterior que se extenderáa otros países europeos que participan en este proyecto de manera inminente. Elaprendizaje simultáneo de los contenidos del currículum y una segunda o terceralengua es una de las líneas prioritarias de la investigación educativa en elcontexto europeo, y así lo recoge el proyecto que presentamos.
Factores pronósticos y predictivos del carcinoma de próstata en la biopsia prostática
De Torres Ramírez,I.;
Actas Urológicas Espa?olas , 2007, DOI: 10.4321/S0210-48062007000900010
Abstract: this paper reviews the morphological cancer diagnosis criteria on needle biopsies , the predictive meaning of the pathological lesions of hgpin, haa, and p.i.a and the peculiar histopathological patterns in prostatic adenocarcinoma. we present the histological parameters that the pathologist has to informe in the diagnositic, on the routine prostate needle biopsy: gleason histological degree, histological type, number of invaded cilindres, percentage of tumor in each cylinder, location of the biopsy and ymphovascular invasión. we also emphasize the importance of new predictive biomarkers nowadays in study and probably involved in tumor progression.
Les migdiades musicals en València
Ramírez i Beneyto, Ramon
Anuario Musical , 2006,
Abstract: In this article, the author first makes public a series of references – from the press, church chapter’s minute books, notarial deeds and other documents preserved at the Valencia Cathedral archives- which make reference to musical sessions held in the city cathedral and also in other church and convents in the city and surrounding areas. With this, it gets perfectly proved that these concerts were held in the frame of the Valencian church at least form the beginning of the 17th century to some years into the 19th century, at it also gets proved that the habit of helding this kind of musical sessions continued, with the aim of making the festivities held during all this time brighter. Also the places, dates and chapels where performances were held in each moment are offered, as well as a possible approximation to the repertoire played in them. En aquest article, l’autor fa públiques per primera vegada una sèrie de referències -recollides en la premsa, els llibres d’actes capitulars, protocols notarials i altres documents conservats a l’arxiu catedralici valencià- tocants a la celebració de migdiades de música, tant a la catedral metropolitana com en la resta d’esglésies i convents de la ciutat de València i els seus voltants. De tal manera que, amb això, es documenta perfectament la realització d’aquests concerts de música dintre del marc eclesiàstic valencià almenys des de principis del segle XVII fins ben entrat el segle XIX, demostrant-se igualment la pervivència en l’ús i el costum de realitzar aquest tipus d’actes musicals amb la intenció d’aconseguir un major llu ment en les festivitats que se celebren al llarg de tot aqueix temps. S’aporten també els llocs, les dates i les capelles que actuaven en cada moment, amb una possible aproximació al repertori interpretat.
Recycling Agave Bagasse of the Tequila Industry  [PDF]
C. G. I?iguez, C. J. J. Bernal, M. W. Ramírez, N. J. Villalvazo
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.42016
Abstract:

This paper presents an overview of different handling systems and use of the agave bagasse. These systems have appeared from different research works always taking in account the environmental sustainability. It is mentioned that the agave bagasse can be used for animal feeding, for the elaboration of compound materials, as an element for agricultural and hydroponic vegetables cultivation purposes, and also as a means to treat biosolids, vinasses, and bagasses of slaughterhouses and tanneries.

Which stressors are responsible for the worsening in the clinical symptomatology of lupus?  [PDF]
M. I. Peralta-Ramírez, J. Jiménez-Alonso, M. Pérez-García
Health (Health) , 2009, DOI: 10.4236/health.2009.14051
Abstract: Objective: The purpose of this study was to test which stressors worsen the symptoms perceived by patients with lupus, thus broadening and corroborating results obtained in a previous study published in Psychosomatic Medicine. Methods: In order to examine this question, we selected 43 patients with lupus whose symp-toms worsened due to the effects of daily stress. These patients were divided into two groups: patients whose increase in clinical lupus symp-tomatology was predicted by an increase in daily stressors on the same day (G1) and pa-tients whose increase in clinical lupus symp-tomatology was predicted by an increase in daily stressors the day before and the same day (G2). Later, three factorial analyses were con-ducted with the items related to stressors and the items related to lupic symptoms. Results: The results showed that in G1 there were three factors that made up a total of 35.08% of the explained variance. The stressors associated with certain symptoms of the illness in this group are feeling ill or being worried about their physical appearance, with the main stressor being the illness itself. However, in G2, two factors were found that made up a total of 40.37% of the explained variance for lag=0 and 38.67% for lag=1. The stressors associated with the majority of the lupus symptoms are of an interpersonal and work-related nature. This as-sociation was maintained when we carried out the factorial analyses with the items of the symptoms from the following day. Conclusions: The interpersonal and work-related stressors are related to a worsening in the majority of the lupic symptoms in the patients whose sympto-matology worsens as a result of daily stress experienced the day before.
Conservación de la biodiversidad en sistemas silvopastoriles de Matiguás y Rio Blanco (Matagalpa, Nicaragua)
A. M. Pérez,M. Sotelo,F. Ramírez,I. Ramírez
Ecosistemas , 2006,
Abstract: Con el fin de estudiar la relación entre uso del suelo y diferentes componentes de la biodiversidad de aves moluscos y plantas, se seleccionaron 12 usos de suelo en 41 fincas, 28 en Bulbul y 13 en Paiwas (Matagalpa, Nicaragua). Para el monitoreo de la vegetación se establecieron 10 parcelas en cada uso de suelo, siempre que fue posible, donde se estudió el número de árboles, densidad de tallos y arbustos, perfiles de altura del follaje, altura promedio del dosel, porcentaje de cobertura del dosel y cobertura del suelo. Para el estudio de las aves se realizaron puntos de conteo en todas las fincas seleccionadas. Para el estudio de los moluscos se muestreó en el 50% de las parcelas de vegetación y aves. Se realizaron 3 campa as de muestreo para el estudio de las aves, 2 para los moluscos y 1 para la vegetación. Se han identificado un total de 170 especies de plantas, 180 especies de aves y 56 especies de moluscos. Se ha concluido el estudio de la estructura de la vegetación y las comunidades de aves, y se ha muestreado en 113 parcelas distribuidas en 12 tipos de usos de suelo y 41 fincas, así como 10 parcelas en el Cerro Quirragua para un total de 123 parcelas. Los valores más altos de riqueza de especies en plantas, se encontraron en el bosque primario del Cerro Quirragua (S=46) y en los bosques riparios (S=43). En aves, se encontraron en los bosques riparios (S=74) y en bosques secundarios intervenidos (S=72). En moluscos, en bosques primarios (S=35), seguidos por los Tacotales (S=28). Los valores más altos de biodiversidad para plantas se encontraron en el bBosque primario de Quirragua (H′=3,34) y en los bosques riparios (H′=3,12). Para aves, en bosques riparios (H′=3,92) y bosques secundarios intervenidos (H′=3,86). Para moluscos, los bosques primarios (H =2,93) y los bosques riparios (H =2,46).
Underlying Assets Distribution in Derivatives: The BRIC Case  [PDF]
José Antonio Nú?ez, Mario I. Contreras-Valdez, Alfredo Ramírez-García, Eduardo Sánchez-Ruenes
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.83035
Abstract: This paper addresses one of the main issues regarding numerical derivatives valuation, particularly the search for an alternative to the normality assumption of underlying asset returns, to obtain the price by using numerical techniques. There might be difficulties in making normality assumptions, which could produce over-valuated or sub-valuated prices of derivatives. Under this consideration, the Generalized Hyperbolic family has been proven to be a proper selection to model heavy tailed distribution behavior. The Normal Inverse Gaussian (NIG) distribution is a member flexible enough to model financial returns. NIG distribution can be used to model distribution returns under different states of nature. The indexes of the Brazil, Russia, India and China (BRIC) economies were studied at different time-periods using return data series from 2002 to 2005, 2006 to 2010 and 2011 to 2015, in such a manner to demonstrate with statistical criteria that NIG fits the empirical distribution in the three periods; even throughout economic downturn. This result may be used as an improvement in derivatives valuation with indexes as underlying assets.
Transposable element derived DNaseI-hypersensitive sites in the human genome
Leonardo Mari?o-Ramírez, I King Jordan
Biology Direct , 2006, DOI: 10.1186/1745-6150-1-20
Abstract: Human genome TEs were found to contribute substantially to HS regulatory sequences characterized in CD4+ T cells: 23% of HS sites contain TE-derived sequences. While HS sites are far more evolutionarily conserved than non HS sites in the human genome, consistent with their functional importance, TE-derived HS sites are highly divergent. Nevertheless, TE-derived HS sites were shown to be functionally relevant in terms of driving gene expression in CD4+ T cells. Genes involved in immune response are statistically over-represented among genes with TE-derived HS sites. A number of genes with both TE-derived HS sites and immune tissue related expression patterns were found to encode proteins involved in immune response such as T cell specific receptor antigens and secreted cytokines as well as proteins with clinical relevance to HIV and cancer. Genes with TE-derived HS sites have higher average levels of sequence and expression divergence between human and mouse orthologs compared to genes with non TE-derived HS sites.The results reported here support the notion that TEs provide a specific genome-wide mechanism for generating functionally relevant gene regulatory divergence between evolutionary lineages.This article was reviewed by Wolfgang J. Miller (nominated by Jerzy Jurka), Itai Yanai and Mikhail S.Gelfand.Reviewed by Wolfgang J. Miller (nominated by Jerzy Jurka), Itai Yanai and Mikhail S.Gelfand. For the full reviews, please go to the Reviewers' comments section.Transposable elements (TEs) are DNA sequences capable of moving among chromosomal locations within the genome. TEs are copious genomic entities; at least half of the human genome sequence is derived from TE insertions [1,2]. While TEs were once thought to be purely selfish parasites concerned only with their own proliferation [3], there are now numerous examples of TE sequences that have been domesticated [4] to play some role for the host genomes in which they reside [5]. One way that TEs can achieve such a
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