Título del artículo:

Effects of homeopathy on seminal quality in bulls

Acerca de la revista donde se publicó este artículo:

Revista Electronica de Veterinaria

Título del artículo:

Best antihypertensive strategies to improve blood pressure control in Latin America: Position of the Latin American Society of Hypertension

Evidence from randomized trials has shown that effective treatment with blood pressure (BP)-lowering medications reduces the risk of cardiovascular morbidity and mortality in patients with hypertension. Therefore, hypertension control and prevention of subsequent morbidity and mortality should be achievable for all patients worldwide. However, many people in Latin America remain undiagnosed, untreated or have inadequately controlled BP, even where this is access to health systems. Barriers to hypertension control in low-income countries include difficulties in transportation to health services; inappropriate opening hours; difficulties in making clinic appointments; inaccessible healthcare facilities, lack of insurance and high treatment costs. After a review of the best recent available evidence on the efficacy and tolerability of antihypertensive drugs and strategies, the Latin American Society of Hypertension experts conclude that all major classes of BP-lowering drugs be available to hypertensive patients, because all have been shown to reduce major cardiovascular outcomes compared with placebo, and have shown to be associated with a comparable risk of major cardiovascular events and mortality when compared between classes. Within each class, no evidence whatsoever is available to show that one compound is more effective than another in outcome prevention. Therefore, the selection of individual drugs may be based mainly on the capacity of Latin American governments to obtain the lowest prices of the different molecules manufactured by companies with high production quality standards.

Acerca de la revista donde se publicó este artículo:

Journal of Hypertension

Título del artículo:

New ground motion prediction equation for deep subduction earthquakes in Colombia

Two deep large earthquakes with Mw = 7.2 and 7.0 occurred in Colombia (Northern South America) in 2012 and 2013, which made evident the vast potential of damage to vulnerable towns near the epicenters. As a contribution to the update of the seismic hazard of Colombia, a preliminary evaluation of the relationship between magnitude, distance, soil type and spectral acceleration at different periods was assessed with the objective of developing prediction models for ground motions from deep subduction earthquakes in the Pacific and Western Region of Northern South America. This article presents advances in the determination of a ground motion prediction equation that uses 249 records from 19 deep subduction events with Mw > 4.9, depth larger than 70 km, hypocentral distance shorter than 500 km, located in Colombia between 0° - 6° latitude North and 79° - 75° longitude West. These ground motions, associated to the subduction of the Nazca plate in the Colombian Western region, were recorded in rock and soil sites by the National Strong Motion Network of Colombia. The residual analysis based on a global ground motion prediction model known as the BC Hydro GMPE, suggested the need for a regional ground motion prediction model that accounts for differences in hypocentral distance scaling, in order to completely explain the empirical data of the deep subduction earthquakes in the Western region of Colombia. A new model for the prediction of ROTD50 five-percent-damped spectral acceleration intensity values for intraslab subduction earthquakes is presented. The model is a regionalization of the global BC Hydro Model, from which the magnitude scaling terms are used. A regression process, including random effects, resolves the coefficients of the selected functional form, which also includes a fore/back arc, hypocentral depth, and soil terms, along with the typical regional magnitude and distance scaling terms. Analysis of the residual show an improved agreement with the recorded empirical data, hence the model is deemed appropriate to estimate ground motions from deep subduction events in Northern South America.

Acerca de la revista donde se publicó este artículo:

11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy

Título del artículo:

Design of a model for the comprehensive evaluation of the university teacher

Introduction: The educational quality is related to the characteristics of the teacher, axis of the creation of knowledge and motivator of the teaching and learning process. The evaluation of their performance under a comprehensive vision, allows assessing the person in three dimensions: the knowledge that recognizes him as a teacher, the fact that he recognizes him as a worker and the person who recognizes him as a person. Method: Descriptive study, where a mixed approach method with a dominant qualitative perspective was developed, with a cross-sectional field design. Phase I was developed for the design of the Comprehensive Evaluation Model for the University Professor (MEIPU) and construction of rubrics where 63 professors participated and in Phase II, 224 teachers and 489 students participated to validate rubrics that evaluate teacher performance. Results: Design of the MEIPU and application in WEB platform that facilitates the process of heteroevaluation, co-evaluation and self-evaluation of the teacher by means of the bank of rubrics that evaluate the didactic, pedagogical, communicative, socio-affective and specific professional competences that involve 43 criteria in order to determine the degree of teacher performance. Conclusions: the MEIPU was built, where the academic community participated in a consensual manner. This evaluation system allows to observe the level of performance and through reports generated by the application allows identifying weaknesses and strengths during the pedagogical practice, which leads to the design of improvement plans for teacher qualification to ensure the success of their work future.

Acerca de la revista donde se publicó este artículo:

Revista de Pedagogia

Título del artículo:

Antimicrobial activity of Cymbopogon citratus (Poaceae) on Streptococcus mutans biofilm and its cytotoxic effects

Dental caries is a pathology of multifactorial origin and currently natural products are an efficient alternative treatment. The work sought to evaluate the antimicrobial activity of the three substances (Cymbopogon citratus essential oil and the citral and myrcene components) against Streptococcus mutans ATCC UA159, as well as their cytotoxicity on keratinocytes and human fibroblasts. Through Scanning electron microscopy, the typical morphology of S. mutans was observed and, a characteristic formation of polysaccharides, with more structured arrangement at 48 h. The bacterial viability effect against S. mutans on biofilms was evaluated through exposure to the three substances by using the MBEC technique-high-throughput at concentrations of 1, 0.1, and 0.01 µg/mL and chlorhexidine as positive control. The cytotoxicity of the compounds was evaluated on keratinocytes and fibroblasts through the MTT reduction technique, using 0.5 mM H2O2 as cell-death control (negative control) and ethanol 1 % as vehicle control (positive control). The three substances evaluated had effects on the bacterial viability of S. mutans with mortality between 74 and 96 %, without significant difference among them (P > 0.393); additionally, no cytotoxicity was evident on keratinocytes and fibroblasts in a 24 h treatment. The substances evaluated showed significant antimicrobial effects; hence, these should be studied further as potential co-adjuvants to prevent dental caries that cause minor adverse effects.

Acerca de la revista donde se publicó este artículo:

Revista de Biologia Tropical

Título del artículo:

A comparison of the isometric force fatigue-recovery profile in two posterior chain lower limb tests following simulated soccer competition

Aim: To evaluate the reliability of isometric peak force (IPF) in a novel “long-length” 90Hip:20-Knee (90:20) strength test and to compare the simulated soccer match induced fatigue-recovery profile of IPF in this test with that of an isometric 90Hip:90Knee (90:90) position test. Methods: Twenty semi-professional soccer players volunteered for the study of which 14 participated in the first part of the study which assessed 90:20 reliability (age = 21.3 ± 2.5 years, height = 1.79 ± 0.07 m, body mass = 73.2 ± 8.8 kg), while 17 completed the second part of the study evaluating fatigue-recovery (age 21.2±2.4 yrs., height = 180 ± 0.09 m, body mass 73.8 ± 8.9 kg). We evaluated the inter-session reliability of IPF in two 90:20 test protocols (hands on the wall (HW); and hands on chest (HC)) both performed on two occasions, 7 days apart. We then assessed 90:20 (HC) and 90:90 IPF immediately before (PRE) and after (POST) after a simulated soccer match protocol (BEAST90mod) and 48 (+48 h) and 72 hours (+72 h) later. Results: Part one: the 90:20 showed moderate to high overall reliability (CV\'s of 7.3% to 11.0%) across test positions and limbs. CV\'s were lower in the HW than HC in the dominant (7.3% vs 11.0%) but the opposite happened in the non-dominant limb where CV\'s were higher in the HW than HC (9.7% vs 7.3%). Based on these results, the HC position was used in part two of the study. Part two: 90:20 and 90:90 IPF was significantly lower POST compared to PRE BEAST90mod across all testing positions (p<0.001). IPF was significantly lower at +48 h compared to PRE in the 90:20 in both limbs (Dominant: p<0.01,Non-dominant: p0.05), but not in the 90:90. At +72 h, IPF was not significantly different from PRE in either test. Conclusions: Simple to implement posterior IPF tests can help to define recovery from competition and training load in football and, potentially, in other multiple sprint athletes. Testing posterior chain IPF in a more knee extended 90:20 position may provide greater sensitivity to fatigue at 48 h post simulated competition than testing in the 90:90 position, but also may require greater degree of familiarization due to more functional testing position.

Acerca de la revista donde se publicó este artículo:

PLoS ONE

Título del artículo:

Ice cream prepared with Musa paradisiaca and probiotic improves the serum levels of calcium, iron and potassium in a children population

Malnutrition affects society, mainly children with limited resources, with low levels of minerals being the direct consequence. An explanatory research was developed, with experimental design to evaluate the effectiveness of the consumption of an ice cream of Musa paradisiaca supplemented with probiotics in a child population of Cúcuta-Colombia. From 238 schoolchildren, a sample of 33 children aged 4 to 6 years with serum deficits of Ca, Fe and K participated and they were randomly divided into two groups. For 60 days the ice cream was supplied to Group A and Group B a placebo ice cream, registering weight, height, serum levels of Ca, Fe and K before, during and after the ice cream administration. There was a significant increase (p = 0.01) in the iron and calcium levels in Group A; with no significant changes for Group B. In both groups potassium was significantly increased (p <0.05). The body weight and height of the children was increased although there were no differences (p>0.05) between both groups. The consumption of banana-based ice cream supplemented with probiotics represents an alternative to address the deficit of minerals in children.

Acerca de la revista donde se publicó este artículo:

Archivos Latinoamericanos de Nutricion

Título del artículo:

Calibration of the aquacrop model in special coffee (Coffea Arabica) crops in the sierra nevada of Santa Marta, Colombia

Background and Objective: This study proposed the application of the AquaCrop model in special coffee crops. Till now, no studies were found on the application of this model in this specific crop, which is the main contribution of this research study. In this way, the study aims to present the calibration of the variables related to type of crop, soil characteristics and management of special coffee agriculture in the Sierra Nevada of Santa Marta, Colombia. Materials and Methods: The theoretical bases considered for the present study focus on the different calibration methodologies of the AquaCrop model in different types of crops. The methodology used is based on the proposal of estimation, measurement, calculation and collection of the respective data of the model. Specifically, the project analyzed databases of climate, soil, crops and management practices. The researchers used the statistical techniques of ordinary least squares and the completion coefficient to perform the fit of the model. Results: The results of the calibration of AquaCrop for coffee (Coffea arabica) special have a coefficient of determination R 2 of 0.71 which indicates that the model is acceptable. In addition, it established a forecast of productivity with specific agroclimatic conditions. According to the calibrated model, the average temperature is the variable with the highest incidence in coffee productivity. Conclusion: The results presented in this paper contribute to the application of the AquaCrop model in coffee crops in different regions.

Acerca de la revista donde se publicó este artículo:

Journal of Agronomy

Título del artículo:

Nutritional status and motor development in children aged 0 to 5 years of Kankuama indigenous ethnicity

Objective. To determine the relation between the motor development and the nutritional state in children of 0 to 5 years of the Kankuamo ethnic group. Materials and methods. Investigation of quantitative approach with design of analytical cross-sectional type, the population was constituted by 135 children of 0 5 children of the Kankuama ethnic group from who a no probabilistic sample by deliberate selection was obtained that fulfilled the inclusion criteria and exclusion, For the evaluation The anthropometric evaluation of the motor development was used to develop the state of the art. Results and Discussion: the collected data of the study corresponded to 135 children of the Kankuama ethnic group of who 54% corresponded to the feminine and 60% to the masculine, the ages oscillated between the 49 and 71 months with a 29.6%, in the results of a EAD the population is in the middle with a 45.2%, followed by the average group with a 27.4%, thirdly the alert group with 25.2% and single to 2.2% are in stop, as far as the nutritional state 16.3 % is in severe acute undernourishment, the 31.9 in moderate acute undernourishment, the 21.5 in acute undernourishment and a 14.1% in overweight. Conclusion. Relation between the nutritional state exists and the motor development of the children of 0 to 5 years of the Kankuama ethnic group, the statistical tests were positive for strong association, this is related to different factors between which the Kankuamo town has had cultural changes and has adopted a globalized style of life more due to the process of violence that it had to suffer, also adds the lack of education on the importance of foods, supplements and medicines to him that the boy must consume.

Acerca de la revista donde se publicó este artículo:

Nutricion Clinica y Dietetica Hospitalaria

Título del artículo:

Blood glucose response to two intensities of physical exercise in young women during fasting

Introduction: Physical exercise in the fasting state has been a controversial topic; however, some studies have shown a greater loss of body fat and better glycemic control in those who participate in aerobic training when fasting. Aim: To evaluate the glycemic response after a session of moderate or vigorous physical exercise in young women in the state of fasting. Material and method: A randomized clinical trial was carried out. Twenty-six women (19 to 22 years old) were randomly assigned to two intervention groups. The first group was trained at an intensity of 70% of maximum heart rate (MHR) for 30 minutes, and the second group at an intensity of 90% MHR for 15 minutes. Height (cm), weight (Kg), body mass index (BMI), fat percentage, and maximum oxygen consumption (VO2max) during a stress test were evaluated. Blood glucose levels were checked before and after the exercise session of each group. Results: No significant changes were found in post-exercise blood glucose levels in any experimental group, and the existing differences were not statistically significant. Conclusions: Moderate or vigorous physical exercise during fasting did not show significant variations in blood glucose, which suggests that it is safe for healthy young women to train when fasting.

Acerca de la revista donde se publicó este artículo:

Archivos de Medicina del Deporte

Título del artículo:

Results from Colombia\'s 2018 report card on physical activity for children and youth

Acerca de la revista donde se publicó este artículo:

Journal of Physical Activity and Health

Título del artículo:

Long-term Effects of Statins, Blood Pressure-Lowering, and Both on Erectile Function in Persons at Intermediate Risk for Cardiovascular Disease: A Substudy of the Heart Outcomes Prevention Evaluation-3 (HOPE-3) Randomized Controlled Trial

Background It is unclear whether modifying cholesterol, blood pressure, or both affect erectile dysfunction. Also, there are concerns that erectile dysfunction is worsened by common medications used to treat these risk factors. In this study, we evaluated the effect of: (1) cholesterol-lowering with a statin; (2) pharmacologic blood pressure reduction; and (3) their combination, on erectile function. Methods A priori, this was a secondary analysis of the Heart Outcomes Prevention Evaluation-3 (HOPE-3) randomized controlled trial. Men were 55 years of age or older with at least 1 cardiovascular risk factor. Erectile function was measured using the erectile function domain of the International Index of Erectile Function (IIEF-EF) score. Men with incomplete scores, or who did not engage in sexual activity, were excluded. Using a 2 × 2 factorial design, participants were randomized to rosuvastatin (10 mg/d) or placebo, and to candesartan with hydrochlorothiazide (HCTZ; 16 mg/12.5 mg/d; Cand+HCTZ) or placebo. Primary outcome was change in IIEF-EF from baseline to end of study follow-up. Results Two thousand one hundred fifty-three men were included; mean age was 61.5 years, and mean follow-up was 5.8 years. Mean IIEF-EF score at baseline was 23.0 (SD 5.6). Least square mean change in the IIEF-EF score did not differ with rosuvastatin compared with placebo (−1.4; standard error [SE], 0.3 vs −1.5; SE, 0.3; P = 0.74), Cand+HCTZ compared with placebo (−1.6; SE, 0.3 vs −1.3; SE, 0.3; P = 0.10), or combination therapy compared with double placebo (P = 0.35). Conclusions Cholesterol-lowering using a statin, and blood pressure-lowering using Cand+HCTZ, either alone or in combination, do not improve or adversely affect erectile function.

Acerca de la revista donde se publicó este artículo:

Canadian Journal of Cardiology

Título del artículo:

Computer aided design of non-toxic antibacterial peptides

Antimicrobial resistance is increasing at an alarming rate and the number of new antibiotics developed and approved has decreased in the last decades, basically for economic and regulatory obstacles. Pathogenic bacteria that are resistant to multiple or all available antibiotics are isolated frequently. Hence, new antibacterial agents are urgently needed and antimicrobial peptides are being considered as a potential solution to this important threat. These molecules are small host defense proteins that are part of the immune systems of most living organisms such as plants, bacteria, invertebrates, vertebrates, and mammals. These peptides are found in those parts of organisms that are exposed to pathogens and they are active against multiple organisms such as virus, bacteria, and parasites, among others. This review shows different strategies in the computational design of new antibacterial peptides, the physicochemical properties that are considered as the most relevant for the antibacterial activity and toxicity, and it suggests guidelines in order to help in the finding of new non-toxic antibacterial peptides through the development of computational models.

Acerca de la revista donde se publicó este artículo:

Current Topics in Medicinal Chemistry

Título del artículo:

First report of Dioctophyma renale (Nematoda, Dioctophymatidae) in Colombia

Dioctophymosis is a zoonotic parasitic disease caused by Dioctophyma renale (Goeze, 1782). It is distributed worldwide and it affects a large number of wild and domestic mammals. Here we report the first confirmed case of canine dioctophymosis in Colombia. The animal was found dead in the streets of the municipality of Yondó, Antioquia, and its dead body was taken to the Instituto Universitario de la Paz (UNIPAZ) to carry out a necropsy. A parasite worm was found in the right kidney and sent for identification to the Laboratorio de Parasitología of the Universidad de Santander (UDES). The specimen was identified as a male of D. renale upon observing the typical oval and transversely elongated bell-shaped bursa copulatrix with a spicule and no rays. Another important factor to confirm the diagnosis was the anatomical location in the kidney. This is the first time D. renale is reported in a stray dog in Colombia.

Acerca de la revista donde se publicó este artículo:

Biomedica

Título del artículo:

Pedagogical strategy based on the use of OVA through a virtual platform, to strengthen the competences in cinematics of the physics subject, to the students of tenth grade of the Institución Educativa el Nacional de Sahagún Córdoba, Colombia

Se propone la aplicación de las tecnologías de la información basada en el trabajo colaborativo entre estudiantes y docentes de la Institución Educativa el nacional de Sahagun, con el objetivo diseñar la estrategia pedagógica basada en el uso de OVA a través de una plataforma virtual, para fortalecer las competencias en cinemática de la asignatura física, a los estudiantes de décimo grado con base en las necesidades educativas de la población estudiantil, y solidificando la relación docente-estudiante.

Acerca de la revista donde se publicó este artículo:

Espacios

Título del artículo:

Face validity and adaptation of the PHQ-9 for detection of depressive symptoms in university health sciences students Cartagena (Colombia)

Objective To determine the appearance validity of the PHQ-9 for the detection of depressive symptoms among health sciences students at the University of Cartagena, Colombia Materials and Methods: A cross sectional study that assesses the psychometric properties of the PHQ-9 scale. It was consulted to 10 experts in the areas of research and clinical diagnosis. To determine the appearance validity, they were used the relevance and adequacy. Relevance determination was performed through rate content. To assess the adequacy, a panel discussion was conducted. Results: The relevance found that all the items of the PHQ-9 scale were essential for depressive symptoms screening in this population. With a CVR equal to 1 in the nine items evaluated (CVR Essential ≥ 0.62, p = 0.05). For adequacy, idiomatic settings of all items were made taking into account the relevant comments from experts and the panel discussion conclusions. Conclusions: the Phq-9 scale has an adequate appearance validity, it is necessary to evaluate the psychometric properties of this version of the scale in our population.

Acerca de la revista donde se publicó este artículo:

Salud Uninorte

Título del artículo:

Chronic Renal Failure: Clinical case report

It´s the clinical case report of a German shepherd dog, eight years old, that enters to veterinary consultation presenting frequent vomiting, hematemesis, anuric and defensive abdomen. Upon physical examination, there is congested conjunctival mucosa, oral ulcers, ammoniacal odor, depressed, intense pain at palpation of the hypogastrium and left flank. The realization of complete hematology, blood chemistry, Ehrlichia sp. and Anaplasma sp. test were indicated. In addition to the images study in the abdominal cavity. The results obtained showed a slight anemia, thrombocytopenia, elevated blood urea nitrogen (BUN) and creatinine, and significant proteinuria. The study of images did not show the presence of digestive pathologies. According to the clinical signs and complementary examinations, it´s concluded that the patient showed a severe chronic renal failure.

Acerca de la revista donde se publicó este artículo:

Revista Electronica de Veterinaria

Título del artículo:

Canine Babesiosis: Clinical case report

Hemoparasites cause diseases in pets and other domestic animals; however, its true impact has not been sufficiently studied in Colombia. Babesiosis is an infectious disease caused by a parasite of the genus Babesia, which is transmitted by ticks and is of global importance. The objective of this article is to report the clinical findings observed in a canine patient with suspicious signs of babesiosis. A report was made of a canine patient who entered the Veterinary Clinic of the University of Santander (UDES). At the clinical examination presented inappetence, depression lethargy and pale mucous membranes. A blood smear stained with hemacolor and a blood test was performed for the diagnosis. In the bloodstream microorganisms were observed inside the red blood cells compatible with Babesia spp and the results of the blood picture showed anemia, leucopenia and thrombocytopenia. It is concluded that the clinical findings observed in the patient coincide with that reported in the literature.

Acerca de la revista donde se publicó este artículo:

Revista Electronica de Veterinaria

Título del artículo:

Analysis and simulation of complex economic models through the systems dynamics approach

Acerca de la revista donde se publicó este artículo:

CICIC 2018 - Octava Conferencia Iberoamericana de Complejidad, Informatica y Cibernetica, Memorias

Título del artículo:

Characterization of embryonic mortality in broilers

Objective. The purpose of this study was to characterize the incidence of EM in Ross 308 strain eggs. Materials and methods. A prospective cohort study was performed, through candling and embryodiagnosis, in 4 groups of eggs coming from 4 different age breeders. Other data such as percentage of infertility, malformation, malposition, cracked and contaminated eggs were reported. Results. General EM reached 16.08% IC95% (14.69; 17.60) and was different among the different age-groups (p < 0.001), being higher for eggs from 64 week-old breeders with 27.66% IC95%(23.92; 31.99) and lower for the 47 weeks old ones (8.84% IC95%) (6.97; 11.22). In the first week of incubation 57.53% of the embryos died and mortality was at its highiest during days 1 and 3; in the second week EM was 38.42% died, with a maximum of deaths between days 19 and 21. Conclusions. This study allowed confirmation on the biphasic behaviour of EM, although there are variations in the peaks of mortality possibly attributed to differences in production conditions for each enterprise.

Acerca de la revista donde se publicó este artículo:

Revista MVZ Cordoba

Título del artículo:

Neuropeptides in the human brainstem

The physiological importance of the brainstem has made it one of the most studied structures of the central nervous system of mammals (including human). This structure receives somatic and visceral inputs and its neurons send motor efferences by means of the cranial nerves, which innervate the head, neck and sensory organs, and it mediates in several actions such as movement, pain, cardiovascular, respiratory, salivary, sleep, vigil and sexual mechanisms. Most of these actions are mediated by neuroactive substances denominated neuropeptides, which are short amino acid chains widespread distributed in the nervous system, that play a role in neurotransmission, neuromodulation (paracrine and autocrine actions), and act as neurohormones. Increased study of these substances has taken place since the 1980s to shed light on both their potential role and the way that they mediate in the organism’s different activities. Thus, our aim is a detailed review of available morphologic and physiologic data regarding some neuropeptides in the human brainstem. To such end, we will discuss aspects like: 1) the distribution of neuropeptides in the human brainstem; 2) their possible physiological actions in the human brainstem; 3) neuropeptide coexistences in the human brainstem; and 4) future research in neuropeptides in the human brainstem.

Acerca de la revista donde se publicó este artículo:

Investigacion Clinica (Venezuela)

Título del artículo:

Effect of agricultural inputs and essential oils on the soil of vegetables in Colombia\'s Caribbean region

The contribution of vegetables to food security and economic development in Colombia, as well as to environmental problems worldwide, justifies the interest to design sustainable production strategies for the agro-chain. This study was developed to evaluate the effect of the application of essential oils and agricultural inputs in chili peppers, beans and eggplants in Codazzi, Cesar, Colombia. The methodology included the compatibility analysis between pesticides used in these vegetables, and Lippia alba and Cymbopogon citratus oils in relation to their biocidal effect in vitro on native strains of Macrophomina phaseolina, Phytophthora capsici and Colletotrichum gloeosporioides. Applications of thiabendazole in an individual basis and combined with oils were carried out in the field. Physicochemical and microbiological indicators of soil, pests and diseases incidence and crop yield were measured. Oils controlled up to 97% of plant pathogens in vitro and exhibited compatibility with carbendazim and thiabendazole. In the field, up to 67 % of disease control was observed with C. citratus + thiabendazole compared to the control (p = 0.00), yields were close to the regional average, and better microbiological and physicochemical soil conditions were observed. In conclusion, there are differences in the edaphic effect between treatments, as the agrochemical and the oil combinations were more favorable than the individual effect of each product on the variables evaluated. The above exhorts to continue soil evaluations with oils to elucidate the duration of the described effects.

Acerca de la revista donde se publicó este artículo:

Corpoica Ciencia y Tecnologia Agropecuaria

Título del artículo:

Practice patterns and outcomes after stroke across countries at different economic levels (INTERSTROKE): an international observational study

Background: Stroke disproportionately affects people in low-income and middle-income countries. Although improvements in stroke care and outcomes have been reported in high-income countries, little is known about practice and outcomes in low and middle-income countries. We aimed to compare patterns of care available and their association with patient outcomes across countries at different economic levels. Methods: We studied the patterns and effect of practice variations (ie, treatments used and access to services) among participants in the INTERSTROKE study, an international observational study that enrolled 13 447 stroke patients from 142 clinical sites in 32 countries between Jan 11, 2007, and Aug 8, 2015. We supplemented patient data with a questionnaire about health-care and stroke service facilities at all participating hospitals. Using univariate and multivariate regression analyses to account for patient casemix and service clustering, we estimated the association between services available, treatments given, and patient outcomes (death or dependency) at 1 month. Findings: We obtained full information for 12 342 (92%) of 13 447 INTERSTROKE patients, from 108 hospitals in 28 countries; 2576 from 38 hospitals in ten high-income countries and 9766 from 70 hospitals in 18 low and middle-income countries. Patients in low-income and middle-income countries more often had severe strokes, intracerebral haemorrhage, poorer access to services, and used fewer investigations and treatments (p<0·0001) than those in high-income countries, although only differences in patient characteristics explained the poorer clinical outcomes in low and middle-income countries. However across all countries, irrespective of economic level, access to a stroke unit was associated with improved use of investigations and treatments, access to other rehabilitation services, and improved survival without severe dependency (odds ratio [OR] 1·29; 95% CI 1·14–1·44; all p<0·0001), which was independent of patient casemix characteristics and other measures of care. Use of acute antiplatelet treatment was associated with improved survival (1·39; 1·12–1·72) irrespective of other patient and service characteristics. Interpretation: Evidence-based treatments, diagnostics, and stroke units were less commonly available or used in low and middle-income countries. Access to stroke units and appropriate use of antiplatelet treatment were associated with improved recovery. Improved care and facilities in low-income and middle-income countries are essential to improve outcomes. Funding: Chest, Heart and Stroke Scotland.

Acerca de la revista donde se publicó este artículo:

The Lancet

Título del artículo:

Design of an electroflotation system for the concentration and harvesting of freshwater microalgae

Microalgae are considered as one of the most promising alternatives for the integrated use of agro-industrial water residues and the production of metabolites of high industrial interest. This is due to algae can grow on wastewater which in turn can reduce the emission of nutrients to rivers and lakes. However, the greatest scientific-technological barrier is the concentration and separation of the biomass produced. There are several processes used at different levels (from laboratory to industrial scale) such as flocculation, centrifugation, flotation, etc. These can be very expensive or can (possibly) contaminate the biomass. Unlike the previous ones, electroflotation has been proposed as a cost-efficient method, nevertheless its final efficiency will depend heavily on the type of alga and culture medium. Taking into account the above, the present project aims to design an electroflotation system for the concentration and harvest of microalgae biomass. The effect of several factors (pH, time, voltage and distance between the electrodes) and for types of materials (Copper, Aluminium, Iron and Steel) on biomass recovery efficiency from a culture of Chlorella vulgaris UTEX 1803 was evaluated by the implementation of a Design of experiments (43 non-factorial design) using STATISTICA 7.0. Results show that, the materials with higher concentration efficiency were cooper and aluminium with 40 and 80% respectively, and the most relevant factors were distance between electrodes (1-2 cm), time (>20 min) and Voltage (>15V). In order to increase the efficiency of the overall process a new 43 experimental factorial design was proposed using as factors distance between electrodes, time, voltage and agitation. Results show that agitation positively affects the total efficiency until reaching a total concentration of the biomass (100%). It was found that a voltage close to 50V and a time greater than 25 min positively affect the final efficiency of the copper and aluminium electrodes, however aluminium has the highest efficiency (> 95%) compared to copper (<85%).

Acerca de la revista donde se publicó este artículo:

Chemical Engineering Transactions

Título del artículo:

Production of chlorella vulgaris biomass on uv-treated wastewater as an alternative for environmental sustainability on high-mountain fisheries

The sustained expansion of agricultural industry in Colombian high-mountain has led to an increased size of residues, especially untreated wastewater. This untreated water is an urgent matter for public and environmental health, not only by its nutrient concentration (composed especially of food residuals and feces) but also the presence of pathogens (virus, bacteria, etc.) which are discharged to the environment. The overall objective of this work is to evaluate the effect of UV-treated wastewater from a high-mountain fishery as culture media for the production of Chlorella vulgaris as a sustainable method for nutrient and water recirculation on the fishery production system. The UV-canal efficiency was evaluated by the implementation of an experimental factorial design (time, distance of the UV-lamps towards the canal, number of UV-lamps and the sample concentration) using STATISTICA 7.0 software. Results shown that time (3 to 5 minutes) and the number of lamps (3-4) of 15 Watts eliminate completely coliforms from the samples. After UV-treatment the resulting water was test as culture media for C. vulgaris production by the adjustment of C/N ratio (Sodium Carbonate/potassium nitrate) by the implementation of an experimental 23 factorial design. Results shown that higher nitrate concentrations (>0,22 g/L) and moderate carbonate concentrations (1 g/L) increase the final biomass concentration up to 4g/L in 20 days.

Acerca de la revista donde se publicó este artículo:

Chemical Engineering Transactions