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Search Results: 1 - 10 of 465473 matches for " María Arregui "
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Physico-Chemical and Microbiological Analysis of Water of the “Presa De Los Patos” in the Desierto De Los Leones National Park, Mexico  [PDF]
Luis Raúl Gutiérrez-Lucas, Luz María Chávez-Ramírez, Leticia Arregui
Advances in Biological Chemistry (ABC) , 2017, DOI: 10.4236/abc.2017.72008
Abstract: The Desierto de los Leones National Park is a place that features recreational activities for residents and visitors to Mexico City. The Presa de los Patos (Ducks Dam) is one of the many bodies of water that are present in the park. By means of physico-chemical and microbiological analysis, it was determined that the water of the Presa de los Patos cannot be considered potable. The pH range was between 5.5 - 5.9. The turbidity exceeded the values established in the standards (10.7 - 32.3 Nephelometric Turbidity Units (NTU’s)). Chemical Oxygen Demand (COD) showed that large amounts of oxygen are needed to oxidize organic matter (106 - 450 mg/L). The amount of coliforms and fecal coliforms exceeds the values established by the standards used (total coliforms 98 - 956 Colony Forming Units (CFU’s), fecal coliforms 78 - 807 CFU’s). Five bacterial genera (Escherichia coli, Pseudomona, Klebsiella, Shigella and Salmonella) were isolated and identified. Most of the bacteria isolated were resistant to ampicillin (90%), while 25% were resistant to ciprofloxacin. The water consumption of the Presa de los Patos is a great risk for the habitants and visitors of the park.
La bioinformática en la práctica médica: Integración de datos biológicos y clínicos
Coltell,óscar; Arregui,María; Fabregat,Antonio; Portolés,Olga;
Revista médica de Chile , 2008, DOI: 10.4067/S0034-98872008000500015
Abstract: the aim of our work is to describe essential aspects of medical informatics, bioinformatics and biomedical informatics, that are used in biomedical research and clinical practice. these disciplines have emerged from the need to find new scientific and technical approaches to manage, store, analyze and report data generated in clinical practice and molecular biology and other medical specialties. it can be also useful to integrate research information generated in different areas of health care. moreover, these disciplines are interdisciplinary and integrative, two key features not shared by other areas of medical knowledge. finally, when bioinformatics and biomedical informatics approach to medical investigation and practice are applied, a new discipline, called clinical bioinformatics, emerges. the latter requires a specific training program to create a new professional profile. we have not been able to find a specific training program in clinical bioinformatics in spain
La bioinformática en la práctica médica: Integración de datos biológicos y clínicos Integration of clinical and biological data in clinical practice using bioinformatics
óscar Coltell,María Arregui,Antonio Fabregat,Olga Portolés
Revista médica de Chile , 2008,
Abstract: The aim of our work is to describe essential aspects of Medical Informatics, Bioinformatics and Biomedical Informatics, that are used in biomedical research and clinical practice. These disciplines have emerged from the need to find new scientific and technical approaches to manage, store, analyze and report data generated in clinical practice and molecular biology and other medical specialties. It can be also useful to integrate research information generated in different areas of health care. Moreover, these disciplines are interdisciplinary and integrative, two key features not shared by other areas of medical knowledge. Finally, when Bioinformatics and Biomedical Informatics approach to medical investigation and practice are applied, a new discipline, called Clinical Bioinformatics, emerges. The latter requires a specific training program to create a new professional profile. We have not been able to find a specific training program in Clinical Bioinformatics in Spain
The Children’s Faecal Matter Structure Is Built by Their Parents  [PDF]
Eduard Cueto Rua, Ricardo Wright, Cecilia Zubiri, Luciana Guzmán, Claudia Losada, M. Inés Urrutia, María T. Gonzalez, Ricardo Drut, Mariela Espósito, Norberto Recalde, Jorge Fiad, Ignacio Go?i, Natalia Belén, María Cristina Arregui
Open Journal of Epidemiology (OJEpi) , 2019, DOI: 10.4236/ojepi.2019.91006
Abstract: Introduction: Humans have gone through physical changes over the last 4 million years. The mouth, however, has not changed teeth quantity or quality. Eight incisors for fruits, vegetables and tubers; four little canines for little animals; eight premolars and twelve flat molars are used for crushing these foods, especially whole grains and legumes. The teeth crushing foods are the first step in the building of faecal matter. Foods are selected mostly according to cultural guidelines than to biological needs. The patterns of consumption are induced by the publicity of industrialized or processed foods. Material and Methods: This study design was observational, analytical, correlational, transversal and prospective. One thousand children (0 - 12 years old) were questioned in order to learn about the relationship between Weekly Eating Frequency (WEF) and Faecal Matter (FM) characteristics. The FM was classified as soft, normal or hard and the outcome was expressed as Dry Faecal Residue (DFR). The WEF and Weekly Bowel Movement Frequency (WBMF) were determined and tabulated according to times per week. Environmental factors, parents’ education level and children’s birth order were examined. Results: There was a strong association between DFR, WBMF and WEF. Environment and education level did not play a key role although birth order did matter. Conclusions: Fibre-free foods (dairies, meats, flours and sweeties or sodas) increased DFR. Foods containing fibre from vegetables decreased DFR, which in turn contributed to the WBMF. Lowest DFR was observed in children under Exclusive Breastfeeding (EB). Distant last-born children had higher DFR. Comments: Daily examples support these results and it is clear that children’s FM is built by their parents. We encourage parents to follow the “mouth nature” rather than the “advertisements nature”.
Involvement of Crawling and Attached Ciliates in the Aggregation of Particles in Wastewater Treatment Plants
Lucía Arregui, María Linares, Blanca Pérez-Uz, Almudena Guinea and Susana Serrano
Air, Soil and Water Research , 2012,
Abstract: The biological community in activated sludge wastewater plants is organized within this ecosystem as bioaggregates or flocs, in which the biotic component is embedded in a complex matrix comprised of extracellular polymeric substances mainly of microbial origin. The aim of this work is to study the role of different floc-associated ciliates commonly reported in wastewater treatment plants-crawling Euplotes and sessile Vorticella- in the formation of aggregates. Flocs, in experiments with ciliates and latex beads, showed more compactation and cohesion among particles than those in the absence of ciliates. Ciliates have been shown to contribute to floc formation through different mechanisms such as the active secretion of polymeric substances (extrusomes), their biological activities (movement and feeding strategies), or the cysts formation capacity of some species. Staining with lectins coupled to fluorescein showed that carbohydrate of the matrix contained glucose, manose, N-acetyl-glucosamine and galactose. Protein fraction revealed over the latex beads surfaces could probably be of bacterial origin, but nucleic acids represented an important fraction of the extracellular polymeric substances of ciliate origin.
Involvement of Crawling and Attached Ciliates in the Aggregation of Particles in Wastewater Treatment Plants
Lucía Arregui,María Linares,Blanca Pérez-Uz,Almudena Guinea
Air, Soil and Water Research , 2008,
Abstract: The biological community in activated sludge wastewater plants is organized within this ecosystem as bioaggregates or flocs, in which the biotic component is embedded in a complex matrix comprised of extracellular polymeric substances mainly of microbial origin. The aim of this work is to study the role of different floc-associated ciliates commonly reported in wastewater treatment plants-crawling Euplotes and sessile Vorticella- in the formation of aggregates. Flocs, in experiments with ciliates and latex beads, showed more compactation and cohesion among particles than those in the absence of ciliates. Ciliates have been shown to contribute to floc formation through different mechanisms such as the active secretion of polymeric substances (extrusomes), their biological activities (movement and feeding strategies), or the cysts formation capacity of some species. Staining with lectins coupled to fluorescein showed that carbohydrate of the matrix contained glucose, manose, N-acetyl-glucosamine and galactose. Protein fraction revealed over the latex beads surfaces could probably be of bacterial origin, but nucleic acids represented an important fraction of the extracellular polymeric substances of ciliate origin.
Mortality of Plutella xylostella (Lepidoptera, Plutellidae) by parasitoids in the Province of Santa Fe, Argentina
Bertolaccini, Isabel;Sánchez, Daniel E.;Arregui, María C.;Favaro, Juan C.;Theiler, Natalia;
Revista Brasileira de Entomologia , 2011, DOI: 10.1590/S0085-56262011005000029
Abstract: mortality of plutella xylostella (lepidoptera, plutellidae) by parasitoids in the province of santa fe, argentina. plutella xylostella (linnaeus, 1758) (lepidoptera, plutellidae) larvae cause severe economic damage on cabbage, brassica oleracea l. variety capitata (brassicaceae), in the horticultural fields in the province of santa fe, argentina. overuse of broad spectrum insecticides affects the action of natural enemies of this insect on cabbage. the objectives of this work were to identify the parasitoids of p. xylostella and to determine their influence on larva and pupa mortality. weekly collections of larvae and pupae were randomly conducted in cabbage crops during spring 2006 and 2007. the immature forms collected were classified according to their developmental stage: l1 and l2 (ls = small larvae), l3 (lm = medium larvae), l4 (ll = large larvae), pre-pupae and pupae (p). each individual was observed daily in the laboratory until the adult pest or parasitoid emergence. we identified parasitoids, the number of instar and the percentage of mortality of p. xylostella for each species of parasitoid. parasitoids recorded were: diadegma insulare (cresson, 1875) (hymenoptera, ichneumonidae), oomyzus sokolowskii (kurdjumov, 1912) (hymenoptera, eulophidae), cotesia plutellae (kurdjumov, 1912) (hymenoptera, braconidae) and an unidentified species of chalcididae (hymenoptera). besides parasitoids, an unidentified entomopathogenic fungus was also recorded in 2006 and 2007. in 2006, the most successful parasitoids were d. insulare and o. sokolowskii, while in 2007 only d. insulare exerted a satisfactory control and it attacked the early instars of the pest.
Incidencia y factores de riesgo de la fractura de fémur proximal por osteoporosis
Mosquera María Teresa,Maurel Daniel Luis,Pavón Salvador,Arregui Agustín
Revista Panamericana de Salud Pública , 1998,
Abstract: Todos los a os se producen en el mundo más de un millón de fracturas de fémur proximal, sobre todo en personas de edad avanzada. Dado el continuo envejecimiento de las poblaciones, las fracturas aumentarán a o tras a o y constituirán un problema cada vez más grave de salud pública. Se espera que el mayor aumento de dichas fracturas ocurra en América Latina alrededor del 2050. Teniendo en cuenta que cerca de 70% de las fracturas atraumáticas en personas mayores de 45 a os de edad se deben a osteoporosis, se dise ó un estudio de casos y controles en la ciudad de Mar del Plata, Argentina, para conocer la incidencia de fracturas de fémur proximal por osteoporosis y los factores de riesgo asociados. Entre el 1 de agosto de 1992 y el 31 de julio de 1993 se registraron todos los casos de fracturas de fémur proximal por osteoporosis en personas mayores de 50 a os de edad que acudieron a cualquiera de los 30 centros de salud públicos y privados de la ciudad. Se registró un total de 246 casos. La tasa de incidencia por 100 000 habitantes en la población mayor de 50 a os fue de 259 en mujeres y de 92 en varones, con una relación de 2,8:1. La incidencia fue siempre mayor a mayor edad y sobre todo a partir de los 75 a os. Los factores asociados con aumento del riesgo de fractura de fémur proximal con significación estadística fueron: antecedentes de enfermedades neurológicas, consumo de psicofármacos, consumo de alcohol, fracturas previas, enfermedades cardiovasculares y menor consumo de lácteos. No se observaron diferencias entre los casos y los controles con respecto a edad de inicio de la menopausia, peso, talla, actividad previa, hábito de fumar o exposición al sol, como así tampoco en el porcentaje de mujeres que habían tenido ooforectomías.
Incidencia y factores de riesgo de la fractura de fémur proximal por osteoporosis
Mosquera,María Teresa; Maurel,Daniel Luis; Pavón,Salvador; Arregui,Agustín; Moreno,Carlos; Vázquez,Jesús;
Revista Panamericana de Salud Pública , 1998, DOI: 10.1590/S1020-49891998000400001
Abstract: every year more than one million fractures of the proximal femur occur in the world, especially in older persons. given the continuous aging experienced by populations, such fractures will become more frequent from year to year and will constitute a growing public health problem. the largest increase is expected to occur in countries of latin america around the year 2050. since nearly 70% of all atraumatic fractures in persons over 45 are due to osteoporosis, a case-control study was conducted in the city of mar del plata, argentina, for the purpose of investigating the incidence of and the risk factors associated with proximal femur fractures due to osteoporosis. between 1 august 1992 and 31 july 1993, a record was kept of all fractures of the proximal femur due to osteoporosis in persons over 50 years of age that visited any of the city's 30 public and private health centers. a total of 246 cases was recorded. the incidence rate per 100 000 inhabitants in the above-50 population was 259 among women and 92 among men, for a ratio of 2.8:1. the incidence was consistently higher in the older age groups, especially in persons over 75. factors associated with a statistically significant increased risk of fracture of the proximal femur were: a history of neurologic disorders, psychotherapeutic drug use, alcohol consumption, previous fractures, cardiovascular disease, and a decreased intake of milk products. there were no observed differences between cases and controls with respect to age at menopause, weight, height, previous activity, smoking habits, or sun exposure, nor were such differences detected in terms of the percentage of women who had undergone oophorectomy.
Associated or Concomitant Diseases Influence Significantly the Health-Sickness Concept in Celiacs  [PDF]
Eduardo Cueto Rúa, Maria Teresita Gonzalez Villar, Ricardo Wright, Claudia Losada Gómez, Karol Martínez, María Arregui, Luciana Guzmán, Cecilia Zubiri, Viviana Bernedo, Anabella Zosi, Lorena Menéndez, Lucas Ruiz, Leopoldo Mancinelli, María Urrutia, Ricardo Drut
Open Journal of Epidemiology (OJEpi) , 2017, DOI: 10.4236/ojepi.2017.72013
Abstract: It is well-known that feeling to be a healthy or sick person most probably results from the mind than from the body. We all know healthy people who feel sick and vice versa. We were interested in the health and sickness feeling of celiac people, their autorating of these feelings and its conditioning factors as well as their expectations. In this paper we present the results of an inquiry to evaluate these situations. We performed a descriptive, transversal and prospective study for 2 years to groups of celiacs and their families. They received a closed inquiry to be completed before the beginning of the talk. The inquiry included personal data and the co-existence of associated or concomitant (AoC) diseases. Most of the sample’s patients felt to be a healthy person (86.8%). Mothers see their children as healthy and the auto rated criteria is significantly better than the adult celiac person (“t”= -6.024 (p = 0.000)). AoC diseases influenced negatively in the feeling of being healthy and strongly decreased the autorating. Longer time passed on treatment reflects an increase feeling of health and of the autorating. In people with AoC diseases and who feel sick, the increased time of treatment did not show significant differences. People with “gluten sensitivity” felt sicker and auto rated themselves with a lower number than celiacs. Many pediatric gastroenterologists notice that the newly agreed definition of celiac disease, referring it as “autoimmune, chronic, incurable, and multisystemic”, results in a very negative character of the condition which might compromise the future labour of this people as well as their admittance to different health insurance systems.
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