Cromosoma 13 en anillo.

Background: Ring chromosome 13 is an infrequent cytogenetic disorder clinically characterized by growth and psychomotor development retardation, cognitive deficit, microcephaly, facial dysmorphism, genital alterations and thumb hypoplasia.

Case Report: A 8-month-old patient was evaluated for presenting short stature, psychomotor development delay, microcephaly, facial dysmorphism, penoscrotal hypospadias and thumb hypoplasia. Lissencephaly, neuroconductive hearing loss on the right side and small ostium secundum interatrial communication were evident.

Triglycerides/High density lipoprotein cholesterol ratio as a cardiometabolic risk marker in children and adolescents from Mérida city, Venezuela.

Objective: To determine the behavior of the triglycerides/HDL-cholesterol ratio (TG/HDL) as a cardiometabolic risk marker in children and adolescents from Mérida, Venezuela.

Methods: A total of 1292 children and adolescents aged 7-18 years who attended educational institutions in the Libertador Municipality were enrolled into this study. Anthropometric measurements and blood pressure values were recorded.

[Overweight-obesity and cardiometabolic risk factors in adolescents from Merida city, Venezuela].

To establish the prevalence of overweight-obesity and cardiometabolic risk factors (CRF) (sedentary lifestyle, dyslipidemia, hypertension and impaired carbohydrate metabolism) in children and adolescents in the city of Mérida, Venezuela, we studied 922 children and adolescents from 9 to 18 years of age, from different educational institutions. Anthropometric measurements and arterial blood pressure were recorded. Body mass index was calculated.

Metabolic syndrome in children and adolescents from Mérida city, Venezuela: Comparison of results using local and international reference values (CREDEFAR study).

Objective: To obtain local reference values for blood lipids and blood pressure (BP), and to determine the prevalence of metabolic syndrome (MS) in children and adolescents from Mérida, Venezuela, and to compare results using local and international cut-off values.

Materials And Methods: The study enrolled 916 participants of both sexes aged 9-18 years of age from educational institutions. Demographic, anthropometric, and BP data were collected.

Reference values of waist circumference and waist/hip ratio in children and adolescents of Mérida, Venezuela: comparison with international references.

Objective: To collect regional reference values of waist circumference (WC), and waist/hip ratio (WHR) in children and adolescents from Merida, Venezuela, and to compare them to international references.

Subjects And Methods: A total of 919 students aged 9-17 years from public and private educational establishments were assessed. Weight, height, WC, and WHR were measured.

[Practices, knowledge and attitudes about human hydatidosis in Peru].

Between July 2005 and June 2006, a case-control study was carried out to identify risk factors for hydatidosis in Lima, Peru. As a result, 32 cases were matched according to age, sex and birthplace in 64 controls. The participants were interviewed using a questionnaire designed to evaluate environmental and behavior factors associated to hydatidosis.

Identification of risk factors for cystic echinococcosis in a peri-urban population of Peru.

We conducted a questionnaire-based case-control study to identify risk factors for cystic echinococcosis (CE) in Lima, Peru during July-December 2005. Data were obtained from 32 cases and 64 controls. Multivariate conditional logistic regression showed that having owned > or =10 dogs [adjusted odds ratio (AOR) 8.

Optimisation of biodiesel production by sunflower oil transesterification.

In this work the transformation process of sunflower oil in order to obtain biodiesel by means of transesterification was studied. Taguchi's methodology was chosen for the optimisation of the most important variables (temperature conditions, reactants proportion and methods of purification), with the purpose of obtaining a high quality biodiesel that fulfils the European pre-legislation with the maximum process yield. Finally, sunflower methyl esters were characterised to test their properties as fuels in diesel engines, such as viscosity, flash point, cold filter plugging point and acid value.

Effect of physical training on lipids, lipoproteins, apolipoproteins, lipases, and endogenous sex hormones in men with premature myocardial infarction.

In 17 men, aged 27 to 54 years, with myocardial infarction 2 to 10 months before the current exercise study, we aimed to determine whether 3 months of exercise training, at a level designed to elevate high-density lipoprotein cholesterol (HDLC), would be associated with changes in endogenous sex steroid hormones and postheparin lipoprotein and hepatic lipases, and whether the changes in sex hormones, lipids, lipoproteins, apolipoproteins, and physical activity were interrelated. Supervised bicycle ergometry, 30 minutes, 3 days per week, eliciting 75% of maximum heart rate, produced a significant training effect, with a 26% increase in the duration of the exercise test at a standardized, submaximal workload (P less than or equal to .001), and a reduction in heart rate measured at a standardized submaximal workload, P = .