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https://www.readbyqxmd.com/read/28437654/enhancement-of-particle-aggregation-in-the-presence-of-organic-matter-during-neutralization-of-acid-drainage-in-a-stream-confluence-and-its-effect-on-arsenic-immobilization
#1
Guillermo Arce, Mauricio Montecinos, Paula Guerra, Cristian Escauriaza, Marina Coquery, Pablo Pastén
Acid drainage (AD) is an important environmental concern that impacts water quality. The formation of reactive Fe and Al oxyhydroxides during the neutralization of AD at river confluences is a natural attenuation process. Although it is known that organic matter (OM) can affect the aggregation of Fe and Al oxyhydroxides and the sorption of As onto their surfaces, the role of OM during the neutralization of AD at river confluences has not been studied. Field and experimental approaches were used to understand this role, using the Azufre River (pH 2) - Caracarani River (pH 8...
March 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437593/tabula-rasa-in-the-patagonian-channels-the-phylogeography-of-oreobolus-obtusangulus-cyperaceae
#2
Simon Pfanzelt, Dirk C Albach, Klaus Bernhard von Hagen
The extent of the Pleistocene glaciations in the Patagonian Channel region (southwesternmost South America) and their impact on the vegetation there is largely unknown. Whether the regional flora was wiped out completely (tabula rasa) or survived in ice-free pockets (in situ survival) is still an open question. The molecular imprint of either scenario should still be visible in extant populations. Therefore, DNA sequence data of Oreobolus obtusangulus Gaudich. (Cyperaceae) were analyzed. This species is an abundant constitutent of Patagonian cushion peat bogs, one of the Patagonian Channel region's major vegetation types...
April 24, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28437376/organizational-issues-structure-and-processes-of-care-in-257-icus-in-latin-america-a-study-from-the-latin-america-intensive-care-network
#3
Elisa Estenssoro, Leyla Alegría, Gastón Murias, Gilberto Friedman, Ricardo Castro, Nicolas Nin Vaeza, Cecilia Loudet, Alejandro Bruhn, Manuel Jibaja, Gustavo Ospina-Tascon, Fernando Ríos, Flavia R Machado, Alexandre Biasi Cavalcanti, Arnaldo Dubin, F Javier Hurtado, Arturo Briva, Carlos Romero, Guillermo Bugedo, Jan Bakker, Maurizio Cecconi, Luciano Azevedo, Glenn Hernandez
OBJECTIVE: Latin America bears an important burden of critical care disease, yet the information about it is scarce. Our objective was to describe structure, organization, processes of care, and research activities in Latin-American ICUs. DESIGN: Web-based survey submitted to ICU directors. SETTINGS: ICUs located in nine Latin-American countries. SUBJECTS: Individual ICUs. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Two hundred fifty-seven of 498 (52%) of submitted surveys responded: 51% from Brazil, 17% Chile, 13% Argentina, 6% Ecuador, 5% Uruguay, 3% Colombia, and 5% between Mexico, Peru, and Paraguay...
April 21, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28436361/robotic-repair-of-vesicovaginal-fistulas-using-fibrin-sealant
#4
G Luke Machen, Leah R Chiles, John Joyce, Kristofer R Wagner
INTRODUCTION: Although infrequent, when encountered vesicovaginal fistulas (VVF) are a difficult condition for both patients and physicians alike. After the first robotic repair was described in 2005, this has been an increasingly common treatment modality. At our institution between 2009 and 2014, eleven of these patients were evaluated and treated with robotic repair. However, fibrin sealant was used in place of the traditional tissue flap. Included are six patients who had previously undergone operative repair...
April 2017: Canadian Journal of Urology
https://www.readbyqxmd.com/read/28435013/modeling-chagas-disease-in-chile-from-vector-to-congenital-transmission
#5
Mauricio Canals, Dante Cáceres, Sergio Alvarado, Andrea Canals, Pedro E Cattan
Chagaś disease is a human health problem in Latin America. It is highly prevalent in northern Chile between the Arica-Parinacota and Coquimbo regions, with reported incidence of 3-11/100000 inhabitants and mortality of 0.3-0.4/100000. The interruption of vector transmission was reported in 1999 by means of the elimination of the primary vector, Triatoma infestans, from human dwellings, thus the epidemiologic dynamics of this disease should be modified. Here we model the dynamics of Chagaś disease based on previous models for vector and congenital transmission, propose a model that includes both transmission forms and perform simulations...
April 20, 2017: Bio Systems
https://www.readbyqxmd.com/read/28433641/analysis-of-complications-of-pelvic-mesh-excision-surgery-using-the-clavien-dindo-classification-system
#6
Goran Rac, Alyssa Greiman, Andrew Rabley, T J Tipton, Leah R Chiles, Drew A Freilich, Ross Rames, Lindsey Cox, Michelle Koski, Eric S Rovner
PURPOSE: To describe and categorize complications in patients undergoing vaginal mesh excision surgery using the Clavien-Dindo classification system. MATERIALS AND METHODS: A retrospective review of 277 patients who underwent vaginal mesh extraction between 2007 and 2015 at a single institution was conducted with Institutional Review Board approval. Surgical complications were stratified using the Clavien-Dindo classification system. Complications were noted to be either peri-operative (prior to discharge) or post-operative (within 90 days)...
April 19, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28430765/breastfeeding-knowledge-of-health-professionals-working-in-municipal-healthcare-centers-in-maipu-chile
#7
Laura Medel Marambio, Dafna Benadof, Carol Toro Huerta
INTRODUCTION: Healthcare provider’s knowledge has been identified as a factor associated with clinical practice skills and exclusive breastfeeding prevalence. OBJECTIVES: To evaluate the level of knowledge and training in breastfeeding of healthcare provider’s that work in family healthcare centers of Maipu, Chile, (midwifes, physicians, nurses and nutritionists). To determine association among level of knowledge, profession and breastfeeding training. METHODS: Quantitative, cross-sectional, analytical study...
April 6, 2017: Medwave
https://www.readbyqxmd.com/read/28427930/the-relative-prevalence-of-schizophrenia-among-cannabis-and-cocaine-users-attending-addiction-services
#8
Nicolás Libuy, Valeria de Angel, Carlos Ibáñez, Robin M Murray, Adrian P Mundt
BACKGROUND: Cannabis and cocaine are the most common illicit drugs for which people are treated in addiction services in Latin America. Much research has suggested that the use of cannabis increases the risk of schizophrenia; there is less evidence concerning cocaine. The aim of the present study was to establish the relative prevalence of schizophrenia in people treated for cannabis use and cocaine use disorders in Chile. METHODS: A sample of 22,615 people treated for illicit drug use disorders was obtained from a national registry of addiction service users in Chile...
April 18, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28425414/cholangiohydatidosis-an-infrequent-cause-of-obstructive-jaundice-and-acute-cholangitis
#9
Carlos Manterola, Tamara Otzen
BACKGROUND: One of the evolutionary complications of hepatic echinococcosis (HE) is cholangiohydatidosis, a rare cause of obstructive jaundice and cholangitis. The aim of this study was to describe the results of surgical treatment on a group of patients with cholangiohydatidosis and secondary cholangitis in terms of post-operative morbidity (POM). MATERIAL AND METHOD: Case series of patients operated on for cholangiohydatidosis and cholangitis in the Department at Surgery of the Universidad de La Frontera and the Clínica Mayor in Temuco, Chile between 2004 and 2014...
May 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28424076/caregiver-s-quality-of-life-and-its-positive-impact-on-symptomatology-and-quality-of-life-of-patients-with-schizophrenia
#10
Alejandra Caqueo-Urízar, Marine Alessandrini, Alfonso Urzúa, Xavier Zendjidjian, Laurent Boyer, David R Williams
BACKGROUND: Although the quality of life (QoL) experienced by patients with schizophrenia has been recognized, few studies have assessed the relationship between the caregivers' QoL and patients' QoL. METHODS: The study included 253 stabilized outpatients with schizophrenia and their caregivers from 3 Mental Health Services in Bolivia (N = 83), Chile (N = 85) and Peru (N = 85). Caregivers' and patients' QoL were respectively assessed using two specific QoL questionnaires (S-CGQoL and S-QoL 18)...
April 19, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28421801/actitudes-de-escolares-chilenos-de-distinto-nivel-socioecon%C3%A3-mico-al-inicio-de-la-implementaci%C3%A3-n-de-la-ley-que-regula-la-venta-y-publicidad-de-alimentos-altos-en-nutrientes-cr%C3%A3-ticos
#11
Sonia Olivares Cortes, Jacqueline Araneda Flores, Gladys Morales Illanes, Bárbara Leyton Dinamarca, Nelly Bustos Zapata, María Angélica Hernández Moreno, María Teresa Oyarzún Macchiavello
Introducción: el 27 de junio de 2016 se implementó en Chile la Ley sobre Composición Nutricional de los Alimentos y su Publicidad, que implica rotular el envase de los alimentos procesados, altos en calorías, grasas saturadas, azúcares y sodio.Objetivo: determinar las actitudes de escolares de 8 a 12 años, de distinto nivel socioeconómico (NSE) y estado nutricional, ante el nuevo etiquetado de los alimentos.Métodos: se aplicó una encuesta validada previamente, agregando preguntas sobre los nuevos sellos en los envases de alimentos y bebidas...
March 30, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28417239/incidental-gallbladder-cancer-residual-cancer-discovered-at-oncologic-extended-resection-determines-outcome-a-report-from-high-and-low-incidence-countries
#12
Eduardo Vinuela, Eduardo A Vega, Suguru Yamashita, Marcel Sanhueza, Rosemarie Mege, Gabriel Cavada, Thomas A Aloia, Yun Shin Chun, Jeffrey E Lee, Jean-Nicolas Vauthey, Claudius Conrad
BACKGROUND: Gallbladder cancer detected incidentally after cholecystectomy (IGBC) currently is the most common diagnosis of gallbladder cancer, and oncologic extended resection (OER) is recommended for tumors classified higher than T1b. However, the precise prognostic significance of residual cancer (RC) found at the time of OER has not been well established. This analysis aimed to determine the prognostic impact of RC found in patients with IGBC undergoing OER. METHODS: Outcomes for IGBC at a center for a low-incidence country (USA) and a high-incidence country (Chile) between January 1999 and June 2015 were analyzed...
April 17, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28414749/sequence-variability-of-the-respiratory-syncytial-virus-rsv-fusion-gene-among-contemporary-and-historical-genotypes-of-rsv-a-and-rsv-b
#13
Anne M Hause, David M Henke, Vasanthi Avadhanula, Chad A Shaw, Lorena I Tapia, Pedro A Piedra
BACKGROUND: The fusion (F) protein of RSV is the major vaccine target. This protein undergoes a conformational change from pre-fusion to post-fusion. Both conformations share antigenic sites II and IV. Pre-fusion F has unique antigenic sites p27, ø, α2α3β3β4, and MPE8; whereas, post-fusion F has unique antigenic site I. Our objective was to determine the antigenic variability for RSV/A and RSV/B isolates from contemporary and historical genotypes compared to a historical RSV/A strain...
2017: PloS One
https://www.readbyqxmd.com/read/28413167/impact-of-a-new-law-to-reduce-the-legal-blood-alcohol-concentration-limit-a-poisson-regression-analysis-and-descriptive-approach
#14
Beatriz Nistal-Nuño
BACKGROUND: In Chile, a new law introduced in March 2012 lowered the blood alcohol concentration (BAC) limit for impaired drivers from 0.1% to 0.08% and the BAC limit for driving under the influence of alcohol from 0.05% to 0.03%, but its effectiveness remains uncertain. The goal of this investigation was to evaluate the effects of this enactment on road traffic injuries and fatalities in Chile. STUDY DESIGN: A retrospective cohort study. METHODS: Data were analyzed using a descriptive and a Generalized Linear Models approach, type of Poisson regression, to analyze deaths and injuries in a series of additive Log-Linear Models accounting for the effects of law implementation, month influence, a linear time trend and population exposure...
March 31, 2017: Journal of Research in Health Sciences
https://www.readbyqxmd.com/read/28412633/relationship-among-color-development-anthocyanin-and-pigment-related-gene-expression-in-crimson-seedless-grapes-treated-with-abscisic-acid-and-sucrose
#15
Daniela Olivares, Carolina Contreras, Victoria Muñoz, Sebastián Rivera, Mauricio González-Agüero, Julio Retamales, Bruno G Defilippi
'Crimson Seedless' is one of the most important table grape varieties in Chile, but under certain environmental conditions, the fruit exhibits inadequate red color development, causing economic losses due to lower product quality. The use of plant growth regulators, such as abscisic acid (ABA) and ethylene, during development increases the anthocyanin content of the skin, improving the color of the berry. Recently, sucrose has been identified as a signaling molecule capable of regulating the expression of genes of the anthocyanin biosynthesis pathway...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28411873/-survey-adaptation-for-bio-behavioural-surveillance-of-hiv-in-chilean-female-sex-workers
#16
Bielka Carvajal, Valeria Stuardo, José Manuel Manríquez, Julieta Belmar, Cinta Folch
OBJECTIVE: To adapt a behavioural questionnaire for second-generation HIV/AIDS surveillance in female sex workers (FSWs) in the Metropolitan Region, Chile. METHODS: Qualitative study of instruments validation. A Spanish instrument adapted in Catalonia was validated through a translation and back-translation of the original version. The content validity was determined through a modified Delphi method, via FSW and HIV experts representing community, political and institutional levels...
April 12, 2017: Gaceta Sanitaria
https://www.readbyqxmd.com/read/28411523/doctors-experience-of-coordination-across-care-levels-and-associated-factors-a-cross-sectional-study-in-public-healthcare-networks-of-six-latin-american-countries
#17
María-Luisa Vázquez, Ingrid Vargas, Irene Garcia-Subirats, Jean-Pierre Unger, Pierre De Paepe, Amparo Susana Mogollón-Pérez, Isabella Samico, Pamela Eguiguren, Angelica-Ivonne Cisneros, Adriana Huerta, María-Cecilia Muruaga, Fernando Bertolotto
Improving coordination between primary care (PC) and secondary care (SC) has become a policy priority in recent years for many Latin American public health systems looking to reinforce a healthcare model based on PC. However, despite being a longstanding concern, it has scarcely been analyzed in this region. This paper analyses the level of clinical coordination between PC and SC experienced by doctors and explores influencing factors in public healthcare networks of Argentina, Brazil, Chile, Colombia, Mexico and Uruguay...
April 3, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28410154/current-status-of-a-unique-vaccine-preventing-pregnancy
#18
Gursaran P Talwar, Kripa N Nand, Jagdish C Gupta, Atmaram H Bandivdekar, Radhey S Sharma, Nirmal Kumar Lohiya
The ability of a vaccine linking beta hCG to a carrier to generate antibodies against hCG, its reversibility and safety was established by Phase I clinical trials conducted in India, Finland, Sweden, Chile and Brazil. Employing a hetero-species dimer (beta hCG-αoLH) linked to tetanus toxoid further improved the immunogenicity of the vaccine. Phase II clinical trials showed that anti-hCG titres above 50 ng/ml prevented pregnancy of sexually active fertile women without derangement of ovulation and menstrual regularity...
June 1, 2017: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28404529/cervical-cancer-human-papillomavirus-and-vaccines-assessment-of-the-information-retrieved-from-general-knowledge-websites-in-chile
#19
C S Lopez, E Krauskopf, C E Villota, L O Burzio, J E Villegas
OBJECTIVES: Cervical cancer is the most common gynaecologic malignancy worldwide and is the sixth cause of cancer death in Chile. Human papillomavirus (HPV) is responsible for most cervical cancers. Individuals seeking basic information about HPV frequently turn to health information websites. We hypothesized that some of their data may be inaccurate. STUDY DESIGN: Comparative analysis of information. METHODS: We analyze the content of highly accessed websites such as the Spanish version of Wikipedia and Yahoo Answers through the application of a questionnaire, as well as a website managed by the Chilean Ministry of Health (Minsal)...
April 3, 2017: Public Health
https://www.readbyqxmd.com/read/28404494/association-between-preterm-birth-and-its-subtypes-and-maternal-sociodemographic-characteristics-during-the-post-transitional-phase-in-a-developing-country-with-a-very-high-human-development-index
#20
B M Araya, M Díaz, D Paredes, J Ortiz
OBJECTIVES: Chile is a post-transitional country evolving towards a stationary population pyramid, which may be associated with increasing preterm birth (PTB) rates. This study aimed to compare maternal sociodemographic characteristics between the start of the post-transition phase (1994) and an established stage (2013) and to evaluate associations between these characteristics and PTB. STUDY DESIGN: An observational analytic design was conducted using national birth records (n = 4,956,311)...
March 7, 2017: Public Health
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