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Search Results: 1 - 10 of 330465 matches for " Tomás; Corrales Madrid "
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Fertirrigación con diferentes formas de nitrógeno en el cultivo de tomate en un suelo arcilloso
Villarreal Romero,Manuel; Parra Terraza,Saúl; Sánchez Pe?a,Pedro; Hernández Verdugo,Sergio; Osuna Enciso,Tomás; Corrales Madrid,José Luís; Armenta Bojorquez,Adolfo D;
Interciencia , 2009,
Abstract: the effect of nitrogen form (urea, nitrate and ammonium) provided at various stages of development of the tomato crop on the yield and quality of fruit was studied. the work was conducted under field conditions in a pellustert soil, drip irrigation and a warm and semi-arid climate. three fertilization treatments (t1, t2 and control) were arranged in a randomized complete-block design with three replicates. t1 and t2 were fertilized with 250-50-190kg·ha-1 n, p and k, respectively; which n was supplied in different ratios of ureic-n, ammonium-n and nitric-n along growing tomato plants; t3 was provided in a similar way as is generally employed by the tomato producers in the culiacan valley, sinaloa, mexico (450-118-413kg·ha-1 n-p-k), with 75% of n in nitrate form. the concentration of n-no-3 in the petiole cell extract in t1 and t2 ranged from 500 to 1360ppm, and in the control it was 300-1175ppm. these values were related with the total n doses supplied but not with the ratio of nh4/no3 provided, neither influenced on the total amount of exportation fruit. the fruit production was statistically similar in the high and moderated fertilizer doses with a fertilizer savings of 75% of nitrate n. with respect to the post-harvest quality in the tomato fruit, moderated fertilization associated with high application of ureic-n and ammonium-n did not affect the fruit firmness, obrix or the weight loss in the fruit.
Efecto del calcio y potencial osmótico de la solución nutritiva en la pudrición apical, composición mineral y rendimiento de tomate
Parra Terraza,Saúl; Villarreal Romero,Manuel; Sánchez Pe?a,Pedro; Corrales Madrid,José L; Hernández Verdugo,Sergio;
Interciencia , 2008,
Abstract: blossom-end rot (ber), a physical common disorder in tomato production, is caused by many factors and the control measures are not well defined. in order to study the effects of ca concentration and osmotic potential (ys) of the nutrient solution (ns), and their interaction, on the number of fruits with blossom-end rot (nfber), nutrient contents and yield in two tomato hybrids, b-52 ball type and anibal ?saladette? type, two experiments were carried out under net house conditions at the culiacan valley, sinaloa, méxico. in experiment 1, nine treatments resulting from the combination of varying ca concentrations (4.5, 6.75 and 9.0meq·l-1) and ys in the ns (-0.047, -0.072 and -0.097mpa) were evaluated. in experiment 2 other concentrations of ca (7, 9 and 11meq·l-1) and different ys (-0.036, -0.048 and -0.072mpa) were tested. in experiment 1, increasing levels of ca in ns significantly reduced nfber, while decreasing levels of ys increased it. in experiment 2 the fruits with ber had significantly lower contents of ca and p, and higher mg as compared to the fruits without ber. no significant effects in tomato fruit yield were obtained with the ca and ys factors in the two experiments; thus, it is possible to reduce by 50% the investment in fertilizer.
Robust Soil Quality Index for Tropical Soils Influenced by Agricultural Activities  [PDF]
Jesus Gabriel Rangel-Peraza, Edith Padilla-Gasca, Rosalía López-Corrales, Jaime Rochín Medina, Yaneth Bustos-Terrones, Leonel Ernesto Amabilis-Sosa, Abraham Efraim Rodríguez-Mata, Tomás Osuna-Enciso
Journal of Agricultural Chemistry and Environment (JACEN) , 2017, DOI: 10.4236/jacen.2017.64014
Abstract: The knowledge of the soil quality plays a vital role in the agricultural sector. Despite its importance, there is scarce scientific information concerning this regard. The objective of this research is to develop a methodology to identify and select the most appropriate indicators of Soil Quality Index (SQI) in a region with high agricultural activity. For its conformation, a descriptive statistical analysis and a Pearson correlation matrix were performed and the indicators that showed greater variation were identified using a Principal Components Analysis (PCA). A sensitivity analysis was carried out and the most sensible soil indicators of?SQI?were identified. This statistical procedure was also used to specify the weights of the indicators in?SQI. The variables resulting from the multiparametric statistical analysis were pH, organic matter, sodium, calcium, iron, zinc, cation exchange capacity and electrical conductivity. The robustness of the?SQI?obtained in this study was demonstrated through simulations carried out by the numerical optimization through simplex method. The Soil Quality Index range obtained (0.54 - 0.75) locates Culiacan Valley soils as moderate/high quality.
Implementación de 9 indicadores de calidad en un laboratorio hospitalario Implementation of nine quality indicators in a hospital emergency clinical laboratory
ANA MARíA GUZMáN D,TOMáS SáNCHEZ P,RICARDO DE LA BARRA D,ANGéLICA MADRID Q
Revista médica de Chile , 2011,
Abstract: Background: Quality indicators are tools used to monitor specific activities within a process and improve it. In the area of clinical laboratories, the National Accreditation Standards for Providers of Health and the ISO 15189 standard recommend the implementation of indicators that monitor the test cycle with emphasis on those that contribute to a safer health care. Aim: To describe the implementation of nine indicators in a hospital clinical laboratory and their measurement during one year. Material and Methods: The indicators implemented and measured were four of the pre-analytical phase (number of rejected samples, times of transport, blood culture contamination and blood cultures inoculated with adequate blood volumes), two of the analytical phase (coherence of Gram stains of blood culture with microorganism cultured and correct results in external quality control surveys) and three of the post-analytical phase (compliance with order to report lapse goals, corrected reports and alert values report). Results: Two indicators of pre-analytical phase did not meet the per determined targets: number of rejected samples and blood cultures inoculated with adequate blood volume. All indicators of the analytical and post analytical phases were within thepre-determined targets. Conclusions: Coordinated work should be initiated especially with the nursing service to correct the two indicators that did not meet the target. The incorporation of quality indicators to monitor critical processes within the laboratory was undoubtedly an opportunity to identify areas for improvement.
Implementación de 9 indicadores de calidad en un laboratorio hospitalario
GUZMáN D,ANA MARíA; SáNCHEZ P,TOMáS; DE LA BARRA D,RICARDO; MADRID Q,ANGéLICA; QUIROGA G,TERESA;
Revista médica de Chile , 2011, DOI: 10.4067/S0034-98872011000200010
Abstract: background: quality indicators are tools used to monitor specific activities within a process and improve it. in the area of clinical laboratories, the national accreditation standards for providers of health and the iso 15189 standard recommend the implementation of indicators that monitor the test cycle with emphasis on those that contribute to a safer health care. aim: to describe the implementation of nine indicators in a hospital clinical laboratory and their measurement during one year. material and methods: the indicators implemented and measured were four of the pre-analytical phase (number of rejected samples, times of transport, blood culture contamination and blood cultures inoculated with adequate blood volumes), two of the analytical phase (coherence of gram stains of blood culture with microorganism cultured and correct results in external quality control surveys) and three of the post-analytical phase (compliance with order to report lapse goals, corrected reports and alert values report). results: two indicators of pre-analytical phase did not meet the per determined targets: number of rejected samples and blood cultures inoculated with adequate blood volume. all indicators of the analytical and post analytical phases were within thepre-determined targets. conclusions: coordinated work should be initiated especially with the nursing service to correct the two indicators that did not meet the target. the incorporation of quality indicators to monitor critical processes within the laboratory was undoubtedly an opportunity to identify areas for improvement.
OBESIDAD, SíNDROME DE APNEA-HIPOPNEA DEL SUE?O Y SOMNOLENCIA DIURNA EXCESIVA EN POBLACIóN DE RIESGO CARDIOVASCULAR
Mi?o F,Muriel Alejandra; Fuentes B,Claudio Eduardo; Martínez L,Felipe Tomás; Pérez O,María Eugenia; Madrid A,Eva;
Revista chilena de nutrición , 2008, DOI: 10.4067/S0717-75182008000200004
Abstract: introduction: obesity and sleep apnoea-hypopnoea syndrome (sahos) are risk factors for cardiovascular disease (rfcvd) the ntain symptom of sahos is excessive daily sleepiness (eds), measurable through epworth scale (es). objective: to determine the association between eds and rfcvd and to establish association between sde and rfcvd. methods: a cross-sectional study was done during 2006 and 2007 in a population with frcvd at hospital gustavo fricke, vi?a del mar. anthropometrical measurements were taken and a questionnaire was applied including es. results: sde prevalence measured by ee was 22.12%. prevalence of hypertension, dyslipidemia and diabetes mellitus 2 had no significant differences. variables significantly associated to sde were neck and waist circumference (p=0,0277 and p=0,0008 respectively), body ntass índex (p=0,014) and snoring (p=0,05), reports ofprevious apnoea episodes (p=0,005), sensation of fragmented sleep (p=0,006) and previous history of myocardial infarction (p=0,026) or=3.4 (ic95% 1,22-8,59). discussión: the prevalence found at this study agrees with the literature and the associations found make evaluation and determination of characteristic phenotype an easy and cheap method in order to screen and treat sahos
Factores de riesgo de retención urinaria aguda en cirugía mayor ambulatoria bajo anestesia espinal
DáLBORA P,JORGE; FUENTES B,CLAUDIO; MI?O F,MURIEL; BRAVO V,TOMáS; VICENCIO A,MYRIAM; MADRID A,EVA;
Revista chilena de cirugía , 2008, DOI: 10.4067/S0718-40262008000200010
Abstract: background: the identified risk factors for acute urinary retention after spinal anesthesia are the dose and duration of anesthesia, old age and ano rectal surgical procedures. aim: to assess the prevalence and risk factors of acute urinary retention in the program of ambulatory surgery with spinal anesthesia. material and methods: descriptive case control study. the medical records of 859 patients operated with spinal anesthesia between 2003 and 2006 were reviewed, and 18 patients aged 52 + 16 years, that had an acute urinary retention, were identified. forty vive randomly chosen patients aged 46 + 14 years, without urinary retention were analyzed as controls. results: the calculated prevalence of acute urinary retention was 2.8%. male sex, an age over 50 years and hernia surgery were identified as risk factors for urinary retention with odds ratios of 5.8 (95% confidence interval (cl) 17-28), 3.1 (95%ci 1.-9.9) and 7.6 (95%ci 1.7-33.6), respectively. all cases were managed with intermittent catheterization. hospital stay was one day in 91% and two days in the rest. conclusions: in this series, acute urinary retention occurred in 2.8% of patients after spinal surgery. male sex, age over 50 years and hernia repair procedures were identified ads risk factors for the complication
Filosofia, tom e ilus?o musical em Kant: da vivifica??o sonora do animo à recep??o do tom da raz?o
Madrid, Nuria Sánchez;
Trans/Form/A??o , 2012, DOI: 10.1590/S0101-31732012000100005
Abstract: this article intends, firstly, to enrich the study of the role that the concept of tone plays in kantian idea of reason, by extending it to the analysis of music as art of sounds, which the critique of judgment fulfills. secondly, it aims to determine the grounds that could explain why the mathematics, due to the specificity of the philosophical method and the physical reception of music, respectively, are itself incapable to express the procedures of reason and of the art of sounds. finally, it points out a similarity between reason and music concerning their common rejection of succumbing to the schw?rmerei, although the distance which divides them as two contrary ways to exercise and promote the life and its feeling.
La fragilità della virtù: dall'antropologia alla morale e ritorno nell'epoca di Kant
Nuria Sánchez Madrid
Trans/Form/A??o , 2012, DOI: 10.1590/s0101-31732012000200014
Abstract:
Aviso de valores de alerta por parte del laboratorio clínico en una red de salud universitaria
Guzmán D,Ana María; Solari S,Sandra; Lagos L,Marcela; Poggi M,Helena; Sánchez P,Tomás; Madrid Q,Angélica; Parada B,Jacqueline; Román G,Juan Carlos; Rodríguez P,Luis; Quiroga G,Teresa;
Revista médica de Chile , 2009, DOI: 10.4067/S0034-98872009000900001
Abstract: background: an alert value is a result suggesting that the patient is at imminent danger unless appropriate remedial actions begin promptly. report of alert values (av) by the clinical laboratories has taken special relevance in recent years due to its contribution to patient's care. aim: to report results of av informed during 2007 within the health network of the pontificia universidad católica de chile. material and methods: analysis of av recorded in a centralized database of the laboratories of the health network, between january and december, 2007. results: total number of av was 5.366, which represented 0.3% of total examinations and corresponded mainly to the clinical chemistry area. potassium levels generated the higher number of av detected, followed by positive blood cultures. eighty two percent of av corresponded to hospitalized patients. the greater number of av was reported to intermediate and intensive care services. thirty two percent of av was informed to the physician or professional in charge of the patient within 5 minutes of obtaining the results and 79% within 30 minutes. conclusions: to obtain a real impact on patient management, it is fundamental to shorten the ?apse between the obtainment of tests results and the warning, supported on appropriate computerized systems, and to spread the procedure to all personnel involved in patient's care (revméd chile 2009; 137: 1137-44).
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