COVID-19 mortality in an area of northeast Brazil: epidemiological characteristics and prospective spatiotemporal modelling.

This study aimed to analyse the spatial-temporal distribution of COVID-19 mortality in Sergipe, Northeast, Brazil. It was an ecological study utilising spatiotemporal analysis techniques that included all deaths confirmed by COVID-19 in Sergipe, from 2 April to 14 June 2020. Mortality rates were calculated per 100 000 inhabitants and the temporal trends were analysed using a segmented log-linear model. For spatial analysis, the Kernel estimator was used and the crude mortality rates were smoothed by the empirical Bayesian method. The space-time prospective scan statistics applied the Poisson's probability distribution model. There were 391 COVID-19 registered deaths, with the majority among ⩾60 years old (62%) and males (53%). The most prevalent comorbidities were hypertension (40%), diabetes (31%) and cardiovascular disease (15%). An increasing mortality trend across the state was observed, with a higher increase in the countryside. An active spatiotemporal cluster of mortality comprising the metropolitan area and neighbouring cities was identified. The trend of COVID-19 mortality in Sergipe was increasing and the spatial distribution of deaths was heterogeneous with progression towards the countryside. Therefore, the use of spatial analysis techniques may contribute to surveillance and control of COVID-19 pandemic.

Breast-milk derived potential probiotics as strategy for the management of childhood obesity.

Obesity and overweight, and their concomitant metabolic diseases, emerge as one of the most severe health problems in the world. Prevention and management of obesity are proposed to begin early in childhood, when probiotics may have a role. The Simulator of the Human Intestinal Microbial Ecosystem (SHIME®), in a dynamic validated in vitro system able to simulate the different parts of the gastrointestinal tract, has proven to be useful in analyzing the human intestinal microbial community. L. plantarum 73a and B. animalis subsp. lactis INL1, two strains isolated from breast milk, were assayed in the SHIME® using the fecal microbiota of an obese child. L. plantarum 73a alone or in combination with B. animalis subsp. lactis INL1 demonstrated survival capacity in the SHIME® system. The administration of both strains increased the alpha diversity of the microbiota and reduced the levels of the phylum Proteobacteria. In particular, the genera Escherichia, Shigella, and Clostridium_sensu_stricto_1 were significantly reduced when both strains were administered. The increase of Proteobacteria phylum is generally associated with the microbiota of obese people. Escherichia and Shigellacan be involved in inflammation-dependent adiposity and insulin resistance. L. plantarum73a supplementation reduced ammonia production. L. plantarum 73a alone or in combination with B. animalis subsp. lactis INL1 are potential probiotic candidates for the management of infant obesity.

Risk clusters of COVID-19 transmission in northeastern Brazil: prospective space-time modelling.

This study aimed to analyse the trend and spatial-temporal clusters of risk of transmission of COVID-19 in northeastern Brazil. We conducted an ecological study using spatial and temporal trend analysis. All confirmed cases of COVID-19 in the Northeast region of Brazil were included, from 7 March to 22 May 2020. We used the segmented log-linear regression model to assess time trends, and the local empirical Bayesian estimator, the global and local Moran indexes for spatial analysis. The prospective space-time scan statistic was performed using the Poisson probability distribution model. There were 113 951 confirmed cases of COVID-19. The average incidence rate was 199.73 cases/100 000 inhabitants. We observed an increasing trend in the incidence rate in all states. Spatial autocorrelation was reported in metropolitan areas, and 178 municipalities were considered a priority, especially in the states of Ceará and Maranhão. We identified 11 spatiotemporal clusters of COVID-19 cases; the primary cluster included 70 municipalities from Ceará state. COVID-19 epidemic is increasing rapidly throughout the Northeast region of Brazil, with dispersion towards countryside. It was identified high risk clusters for COVID-19, especially in the coastal side.

Perfil de ácidos graxos do leite de vacas Holandês x Gir alimentadas com silagem de milho e concentrado contendo ou não glicerina bruta / Milk fatty acid profile from Holstein x Gyr cows fed corn silage and concentrate containing or not crude glycerin

O objetivo deste estudo foi avaliar o perfil de ácidos graxos (AG) do leite de vacas alimentadas com dietas à base de silagem de milho contendo 0% e 8,9% de glicerina bruta (GB) na matéria seca (MS). Foram utilizadas 18 vacas Holandês x Gir com 48±18 dias em lactação, produzindo 19,8±4,9kg/dia de leite. Utilizou-se delineamento de blocos ao acaso, com nove vacas/tratamento e duas medidas repetidas no tempo, com os resultados analisados por modelos mistos. A inclusão de GB na dieta não alterou a ingestão de MS, mas reduziu os consumos dos AG oleico, linoleico e α-linolênico. Os teores dos AG mirístico, palmítico, rumênico, vacênico, esteárico, oleico, linoleico, α-linolênico e CLA trans-10 cis-12 na gordura do leite foram semelhantes entre dietas. A inclusão de GB reduziu os teores dos AG elaídico e C18:1 trans-10 e aumentou os teores dos AG de cadeia ímpar linear e do ácido láurico. Não houve efeito da inclusão da GB sobre os índices de aterogenicidade e trombogenicidade da gordura do leite. Concluiu-se que a inclusão de glicerina bruta em dieta à base de silagem de milho não afetou a qualidade nutricional da gordura do leite de vacas Holandês x Gir.(AU)

The objective of this study was to evaluate the milk fatty acid (FA) composition of cows fed corn silage-based diets containing 0% and 8.9% of crude glycerin (GB) on a dry matter (DM) basis. Eighteen Holstein x Gyr cows with 48±18 days in milk and producing 19.8±4.9kg milk/day were used in the study. The experimental design was a randomized block with nine cows per treatment and two repeated measures. Results were analyzed using mixed models. The milk fat contents of myristic, palmitic, rumenic, vaccenic, estearic, oleic, linoleic, α-linolenic, and trans-10 cis-12 CLA were similar between diets. Dietary inclusion of GB decreased elaidic and trans-10 C18:1, and increased lauric acid and odd linear-chain FA contents in milk fat. Both atherogenicity and trombogenicity indices were unaffected by GB inclusion. It was concluded that GB inclusion in corn silage-based diets had no effect on the nutritional quality of milk fat from Holstein x Gyr dairy cows.(AU)

Perfil de ácidos graxos do leite de vacas Holandês x Gir alimentadas com silagem de milho e concentrado contendo ou não glicerina bruta / Milk fatty acid profile from Holstein x Gyr cows fed corn silage and concentrate containing or not crude glycerin

O objetivo deste estudo foi avaliar o perfil de ácidos graxos (AG) do leite de vacas alimentadas com dietas à base de silagem de milho contendo 0% e 8,9% de glicerina bruta (GB) na matéria seca (MS). Foram utilizadas 18 vacas Holandês x Gir com 48±18 dias em lactação, produzindo 19,8±4,9kg/dia de leite. Utilizou-se delineamento de blocos ao acaso, com nove vacas/tratamento e duas medidas repetidas no tempo, com os resultados analisados por modelos mistos. A inclusão de GB na dieta não alterou a ingestão de MS, mas reduziu os consumos dos AG oleico, linoleico e α-linolênico. Os teores dos AG mirístico, palmítico, rumênico, vacênico, esteárico, oleico, linoleico, α-linolênico e CLA trans-10 cis-12 na gordura do leite foram semelhantes entre dietas. A inclusão de GB reduziu os teores dos AG elaídico e C18:1 trans-10 e aumentou os teores dos AG de cadeia ímpar linear e do ácido láurico. Não houve efeito da inclusão da GB sobre os índices de aterogenicidade e trombogenicidade da gordura do leite. Concluiu-se que a inclusão de glicerina bruta em dieta à base de silagem de milho não afetou a qualidade nutricional da gordura do leite de vacas Holandês x Gir.(AU)

The objective of this study was to evaluate the milk fatty acid (FA) composition of cows fed corn silage-based diets containing 0% and 8.9% of crude glycerin (GB) on a dry matter (DM) basis. Eighteen Holstein x Gyr cows with 48±18 days in milk and producing 19.8±4.9kg milk/day were used in the study. The experimental design was a randomized block with nine cows per treatment and two repeated measures. Results were analyzed using mixed models. The milk fat contents of myristic, palmitic, rumenic, vaccenic, estearic, oleic, linoleic, α-linolenic, and trans-10 cis-12 CLA were similar between diets. Dietary inclusion of GB decreased elaidic and trans-10 C18:1, and increased lauric acid and odd linear-chain FA contents in milk fat. Both atherogenicity and trombogenicity indices were unaffected by GB inclusion. It was concluded that GB inclusion in corn silage-based diets had no effect on the nutritional quality of milk fat from Holstein x Gyr dairy cows.(AU)

Exceptional preservation of mid-Cretaceous marine arthropods and the evolution of novel forms via heterochrony.

Evolutionary origins of novel forms are often obscure because early and transitional fossils tend to be rare, poorly preserved, or lack proper phylogenetic contexts. We describe a new, exceptionally preserved enigmatic crab from the mid-Cretaceous of Colombia and the United States, whose completeness illuminates the early disparity of the group and the origins of novel forms. Its large and unprotected compound eyes, small fusiform body, and leg-like mouthparts suggest larval trait retention into adulthood via heterochronic development (pedomorphosis), while its large oar-like legs represent the earliest known adaptations in crabs for active swimming. Our phylogenetic analyses, including representatives of all major lineages of fossil and extant crabs, challenge conventional views of their evolution by revealing multiple convergent losses of a typical "crab-like" body plan since the Early Cretaceous. These parallel morphological transformations may be associated with repeated invasions of novel environments, including the pelagic/necto-benthic zone in this pedomorphic chimera crab.

Ablación cardiaca auricular: estrategias guiadas por el mapeo de electrogramas / Catheter Ablation for Atrial Fibrillation: Electrogram-Guided Methods

Resumen La ablación por radiofrecuencia se ha constituido como la técnica más utilizada para el tratamiento intervencionista de la fibrilación auricular. El aislamiento eléctrico de venas pulmonares se ha convertido en el procedimiento convencional, principalmente en pacientes con fibrilación auricular paroxística. Sin embargo, la tasa de éxito mediante esta técnica en pacientes con fibrilación auricular persistente es alrededor del 50%. Aunque se han propuesto diversas estrategias para guiar al electrofisiólogo en los procedimientos de ablación, estudios recientes muestran que la generación de líneas de ablación adicionales guiadas anatómicamente o mediante mapeo de electrogramas complejos fragmentados, no mejora la tasa de éxito del procedimiento convencional de aislamiento de venas pulmonares. En esta revisión, se consideran las limitaciones que representan los métodos de mapeo electrofisiológicos actuales, las nuevas estrategias de evaluación de los electrogramas y los métodos de procesamiento de señales que se ven propuestos en el futuro más inmediato, para guiar los procedimientos de ablación particularmente en pacientes con fibrilación auricular persistente.

Abstract Radiofrequency catheter ablation has evolved into an effective treatment option for drug-resistant patients with atrial fibrillation. Electrical isolation of the pulmonary veins has become the standard ablation strategy mainly in patients with paroxysmal atrial fibrillation. However, the success rate of pulmonary veins isolation is about 50% in patients with persistent atrial fibrillation. Although different strategies to guide the electrophysiologist in ablation procedures have been proposed. Recent studies show that the generation of additional ablation lines guided anatomically or by fragmented complex electrograms mapping does not improve the success rate of the conventional pulmonary veins isolation procedure. In this review, we describe the limitations of current electrophysiological mapping methods, the new electrogram evaluation strategies and the signal processing methods that are proposed in the immediate future, to guide ablation procedures, particularly in patients with atrial fibrillation persistent.

Caracterización y Clasificación de Señales de Auscultación Cervical Adquiridas con Estetoscopio para Detección Automática de Sonidos Deglutorios / Characterization and Classification of Cervical Auscultation Signals Acquired with Stethoscope for Automatic Detection of Swallowing Sound

Resumen: La evaluación automática de sonidos de auscultación cervical (AC) es una herramienta no invasiva para evaluación de la deglución. Sin embargo, los eventos deglutorios pueden verse enmascarados por fuentes de ruido. Este trabajo propone una metodología de caracterización y clasificación de señales de AC con alta resolución temporal a partir de estetoscopio, para discriminar entre sonidos deglutorios y asociados a ruido. Se adquirieron señales de AC en 10 sujetos sanos durante tres pruebas: toma de líquido, pronunciación del fonema /a/ y aclaramiento de garganta. Se extrajeron características de la señal de AC basadas en coeficientes cepstrales en la escala Mel, transformada wavelet discreta y entropía de Shannon. Las características con mayor relevancia fueron utilizadas como entrada a una máquina de vectores de soporte. Utilizando ventanas de 60 ms - alta resolución temporal - y validación cruzada, se obtuvieron exactitudes del 97.7% para detección de eventos acústicos y 91.7% para sonidos deglutorios. El método propuesto permite clasificación de sonidos deglutorios utilizando estetoscopio -dispositivo común en la práctica clínica- con exactitud comparable a otros trabajos que tienen menor resolución temporal o que utilizan otro tipo de sensores. Este trabajo constituye una primera etapa en el desarrollo de un algoritmo robusto para clasificación de sonidos deglutorios asociados a desórdenes de la deglución, a partir de auscultación cervical, para fines de diagnóstico automático.

Abstract: Automatic evaluation of cervical auscultation sounds (AC) is a non-invasive tool for swallowing assessment. However, the swallowing events could be perturbed by acoustic noise. This paper proposes a methodology of characterization and classification of AC signals acquired by stethoscope with high temporal resolution, in order to discriminate between swallowing sounds and other acoustic noise. AC signals from 10 healthy individuals were acquired with stethoscope during three tasks: liquid ingestion, phoneme /a/ pronunciation and throat clearing. Features based in Mel frequency cepstral coefficients, discrete wavelet transform and Shannon entropy, were extracted. Features with highest Fisher's discriminant ratio were used as input of a support vector machine. By application of 60 ms windows and cross validation, the obtained accuracies were 97.7% for acoustic event detection and 91.7% for swallowing sound detection. The proposed method allows classification swallowing sounds with higher temporal resolution­ than other works but with comparable accuracy. Furthermore, the use of stethoscope could lead to better acceptation than other sensors by physicians, because it is a common device in clinical practice. This work is a first stage in the development of a robust classification algorithm for sounds in swallowing disorders, oriented to automatic diagnosis.

Persistent effects of pre-Columbian plant domestication on Amazonian forest composition.

The extent to which pre-Columbian societies altered Amazonian landscapes is hotly debated. We performed a basin-wide analysis of pre-Columbian impacts on Amazonian forests by overlaying known archaeological sites in Amazonia with the distributions and abundances of 85 woody species domesticated by pre-Columbian peoples. Domesticated species are five times more likely than nondomesticated species to be hyperdominant. Across the basin, the relative abundance and richness of domesticated species increase in forests on and around archaeological sites. In southwestern and eastern Amazonia, distance to archaeological sites strongly influences the relative abundance and richness of domesticated species. Our analyses indicate that modern tree communities in Amazonia are structured to an important extent by a long history of plant domestication by Amazonian peoples.

Multifractal analysis for grading complex fractionated electrograms in atrial fibrillation.

Complex fractionated atrial electrograms provide an important tool for identifying arrhythmogenic substrates that can be used to guide catheter ablation for atrial fibrillation (AF). However, fractionation is a phenomenon that remains unclear. This paper aims to evaluate the multifractal properties of electrograms in AF in order to propose a method based on multifractal analysis able to discriminate between different levels of fractionation. We introduce a new method, the h-fluctuation index (hFI), where h is the generalised Hurst exponent, to extract information from the shape of the multifractal spectrum. Two multifractal frameworks are evaluated: multifractal detrended fluctuation analysis and wavelet transform modulus maxima. hFI is exemplified through its application in synthetic signals, and it is evaluated in a database of electrograms labeled on the basis of four degrees of fractionation. We compare the performance of hFI with other indexes, and find that hFI outperforms them. The results of the study provide evidence that multifractal analysis is useful for studying fractionation phenomena in AF electrograms, and indicate that hFI can be proposed as a tool for grade fractionation associated with the detection of target sites for ablation in AF.

Degradabilidade ruminal in situ do sorgo grão em diferentes formas de reconstituição / In situ ruminal degradability of sorghum grain in different forms of reconstruction

Foram utilizadas três vacas não lactantes fistuladas no rúmen com o objetivo de determinar os parâmetros de degradação ruminal in situ da matéria seca (MS) e do amido de grãos de sorgo sob diferentes formas de processamento: 1) Seco e moído (2mm); 2) Seco, moído (3mm), reidratado com aspersão de água sobre o material, e imediatamente ensilado por 30 dias; 3) Seco, inteiro, reidratado por três dias em tubo PVC e, em seguida, moído a 5mm; 4) Seco, inteiro, reidratado por três dias em tubo PVC com aplicação de ar comprimido e, em seguida, moído a 5mm; 5) Seco, inteiro, reidratado por três dias em tubo PVC e, em seguida, moído a 5mm, e ensilado por 30 dias; 6) Seco, inteiro, reidratado por três dias em tubo PVC com aplicação de ar comprimido, moído a 5mm e ensilado por 30 dias. Os teores de proteína bruta, amido, e fibra em detergente neutro (% da MS) variaram de 9,8 a 10,8%; 59,5 a 67,5%; e de 16,1 a 19,3%, respectivamente. Os teores de umidade nos grãos que foram reidratados variaram de 35,8 a 43,9% da MS. A taxa e a extensão de degradação do amido e a degradabilidade potencial da MS foram semelhantes (P>0,05) entre tratamentos. Os grãos de sorgo reidratados com aplicação de ar comprimido, moídos e ensilados (tratamento 6) apresentaram degradabilidade efetiva (DE) da MS e DE do amido sob taxa de passagem ruminal de 2%/h, semelhantes (P>0,05) às observadas para o tratamento 5 (sem aplicação de ar comprimido), e superiores (P<0,05) às dos demais processamentos. Sob taxas de passagem no rúmen de 5 e 8%/h, as DE do amido estimadas para os grãos processados no tratamento 6 foram superiores (P<0,05) às obtidas para os demais tratamentos. O processamento de reidratação por três dias com aplicação de ar comprimido e ensilagem por trinta dias aumentou a degradabilidade efetiva da matéria seca e do amido dos grãos de sorgo, e sua utilização pode ser recomendada para animais em níveis intermediário e elevado de desempenho...

Used three non-lactating cows fistulated in the rumen in order to determine the parameters of in situ ruminal degradation of dry matter (DM) and starch grain sorghum under different forms of processing: 1) Dried and ground (2mm); 2) Dry, crushed (3mm), rehydrated with water spray on the material and immediately ensiled for 30 days, 3) Dry, round, rehydrated for three days in PVC pipe and then crushed to 5mm, 4 ) Dry, full-rehydrated for three days in PVC tube with application of compressed air and then ground to 5mm; 5) Dry, full-rehydrated for three days in PVC pipe and then ground to 5mm, and ensiled for 30 days; 6) Dry, full-rehydrated for three days in PVC tube with application of compressed air, ground to 5mm and ensiled for 30 days. The crude protein, starch, and neutral detergent fiber (% of DM) ranged from 9.8 to 10.8%, 59.5 to 67.5%, and 16.1 to 19.3%, respectively. The moisture in the grains that were rehydrated ranged from 35.8 to 43.9% DM. The rate and extent of starch degradation and the degradability of MS were similar (P>0.05) between treatments. The grain sorghum rehydrated with application of compressed air, ground and ensiled (treatment 6), showed effective degradability (ED) of DM, and DE starch under ruminal passage rate of 2%/h, similar (P>0.05 ) those observed for treating 5 (without application of compressed air) and higher (P<0.05) to the other processing. Under rumen passage rates of 5 and 8%/h, the estimated NDs starch for processed grains in treatment 6 were higher (P<0.05) than those obtained for the other treatments. Processing rehydration for three days with compressed air application and silage for thirty days increased the effective degradability of dry matter and starch grain sorghum, and its use can be recommended for animals in intermediate and high performance...

Degradabilidade ruminal in situ do sorgo grão em diferentes formas de reconstituição / In situ ruminal degradability of sorghum grain in different forms of reconstruction

Foram utilizadas três vacas não lactantes fistuladas no rúmen com o objetivo de determinar os parâmetros de degradação ruminal in situ da matéria seca (MS) e do amido de grãos de sorgo sob diferentes formas de processamento: 1) Seco e moído (2mm); 2) Seco, moído (3mm), reidratado com aspersão de água sobre o material, e imediatamente ensilado por 30 dias; 3) Seco, inteiro, reidratado por três dias em tubo PVC e, em seguida, moído a 5mm; 4) Seco, inteiro, reidratado por três dias em tubo PVC com aplicação de ar comprimido e, em seguida, moído a 5mm; 5) Seco, inteiro, reidratado por três dias em tubo PVC e, em seguida, moído a 5mm, e ensilado por 30 dias; 6) Seco, inteiro, reidratado por três dias em tubo PVC com aplicação de ar comprimido, moído a 5mm e ensilado por 30 dias. Os teores de proteína bruta, amido, e fibra em detergente neutro (% da MS) variaram de 9,8 a 10,8%; 59,5 a 67,5%; e de 16,1 a 19,3%, respectivamente. Os teores de umidade nos grãos que foram reidratados variaram de 35,8 a 43,9% da MS. A taxa e a extensão de degradação do amido e a degradabilidade potencial da MS foram semelhantes (P>0,05) entre tratamentos. Os grãos de sorgo reidratados com aplicação de ar comprimido, moídos e ensilados (tratamento 6) apresentaram degradabilidade efetiva (DE) da MS e DE do amido sob taxa de passagem ruminal de 2%/h, semelhantes (P>0,05) às observadas para o tratamento 5 (sem aplicação de ar comprimido), e superiores (P<0,05) às dos demais processamentos. Sob taxas de passagem no rúmen de 5 e 8%/h, as DE do amido estimadas para os grãos processados no tratamento 6 foram superiores (P<0,05) às obtidas para os demais tratamentos. O processamento de reidratação por três dias com aplicação de ar comprimido e ensilagem por trinta dias aumentou a degradabilidade efetiva da matéria seca e do amido dos grãos de sorgo, e sua utilização pode ser recomendada para animais em níveis intermediário e elevado de desempenho.(AU)

Used three non-lactating cows fistulated in the rumen in order to determine the parameters of in situ ruminal degradation of dry matter (DM) and starch grain sorghum under different forms of processing: 1) Dried and ground (2mm); 2) Dry, crushed (3mm), rehydrated with water spray on the material and immediately ensiled for 30 days, 3) Dry, round, rehydrated for three days in PVC pipe and then crushed to 5mm, 4 ) Dry, full-rehydrated for three days in PVC tube with application of compressed air and then ground to 5mm; 5) Dry, full-rehydrated for three days in PVC pipe and then ground to 5mm, and ensiled for 30 days; 6) Dry, full-rehydrated for three days in PVC tube with application of compressed air, ground to 5mm and ensiled for 30 days. The crude protein, starch, and neutral detergent fiber (% of DM) ranged from 9.8 to 10.8%, 59.5 to 67.5%, and 16.1 to 19.3%, respectively. The moisture in the grains that were rehydrated ranged from 35.8 to 43.9% DM. The rate and extent of starch degradation and the degradability of MS were similar (P>0.05) between treatments. The grain sorghum rehydrated with application of compressed air, ground and ensiled (treatment 6), showed effective degradability (ED) of DM, and DE starch under ruminal passage rate of 2%/h, similar (P>0.05 ) those observed for treating 5 (without application of compressed air) and higher (P<0.05) to the other processing. Under rumen passage rates of 5 and 8%/h, the estimated NDs starch for processed grains in treatment 6 were higher (P<0.05) than those obtained for the other treatments. Processing rehydration for three days with compressed air application and silage for thirty days increased the effective degradability of dry matter and starch grain sorghum, and its use can be recommended for animals in intermediate and high performance.(AU)

CLASIFICACIÓN DE LATIDOS DE CONTRACCIÓN VENTRICULAR PREMATURA BASADOS EN MÉTODOS DE APRENDIZAJE NO SUPERVISADO / CLASSIFICATION OF PREMATURE VENTRICULAR CONTRACTION BEATS BASED ON UNSUPERVISED LEARNING METHODS / CLASSIFICAÇÃO DE PREMATUROS BATIDAS CONTRAÇÃO VENTRICULAR BASEADO SUPERVISIONADO MÉTODOS DE APRENDIZAGEM

Las enfermedades cardiovasculares son la principal causa de mortalidad en el mundo, por lo que el desarrollo de algoritmos que detecten arritmias cardíacas en tiempo real se ha convertido en un campo de investigación importante. El desarrollo de estos algoritmos ha conllevado a la mejora de dispositivos cardiacos portátiles. Este artículo presenta el desempeño de dos algoritmos basados en aprendizaje de máquina no supervisado para la detección de latidos de contracción ventricular prematura en la señal ECG. Los latidos se extraen de las bases de datos del MIT-BIH, los cuales fueron pre-procesados y segmentados por el grupo de investigación de Dinámica Cardiovascular de la UPB. La Transformada Wavelet Discreta, el Análisis de Componentes Principales y un método híbrido propuesto son implementados para la extracción de características y reducción de dimensiones, a partir de los cuales se generan 8 espacios de características para la evaluación de los algoritmos. Kmeans y Mapas auto-organizados son desarrollados y comparados en términos de precisión y costo computacional. Se logró una especificidad del 96.22 % y una sensibilidad del 95.04 % con un tiempo de ejecución de 79.41µs por latido. Los resultados permiten concluir que estos métodos pueden implementarse en aplicaciones de detección de arritmias en tiempo real debido a su bajo costo computacional.

Cardiovascular diseases are the principal cause of mortality in the world, so that the development of algorithms that detect cardiac arrhythmias in real time has become an important field of research. The development of these algorithms has led to the improvement of wearable cardiac devices. This paper presents the performance of two algorithms based in unsupervised learning methods for the detection of Premature Ventricular Contraction in the ECG signal. The beats are extracted from MIT-BIH databases, which were preprocessed and segmented by the UPB’s Dynamic Cardiovascular research group. The Discrete Wavelet Transform (DWT), Principal Component Analysis (PCA) and a proposed hybrid method are implemented for the feature extraction and dimension reduction, from which 8 feature spaces are generated and tested. Kmeans and Self Organizing Maps are developed and compared in terms of accuracy and computational cost. Specificity of 96.22 % and sensitivity of 95.94% with 79.41µs per beat are accomplished. The results show that these methods can be implemented in applications of real time arrhythmia detection because of their low computational cost.

A doença cardiovascular é a principal causa de morte em todo o mundo, de modo que o desenvolvimento de algoritmos para detectar arritmias cardíacas, em tempo real, tornou-se um importante campo de pesquisa. O desenvolvimento desses algoritmos tem levado a melhores dispositivos cardíacos portáteis. Este artigo apresenta o desempenho dos dois com base na aprendizagem de máquina sem supervisão para detecção de batidas de contração ventriculares prematuras nos algoritmos de sinais de ECG. As batidas são extraídos das bases de dados do MIT-BIH, que foram pré-processados e segmentado pelo grupo da UPB Cardiovasculares Dynamics pesquisa. A Transformada Wavelet Discreta, Análise de Componentes Principais e uma abordagem híbrida proposta são implementadas para extração de características e redução de dimensão, a partir do qual 8 espaços de recursos para a avaliação dos algoritmos são gerados. Kmeans e mapas de auto-organização são desenvolvidos e comparados em termos de precisão e custo computacional. A especificidade de 96,22% e uma sensibilidade de 95,04% com um tempo de execução de 79.41µs por batida foi alcançado. Os resultados mostram que estes métodos podem ser implementados em aplicações de detecção de arritmia em tempo real, devido ao seu baixo custo computacional.

Registro chileno de técnicas de reproducción asistida, 2011 / Chilean record of assisted reproduction techniques, 2011

Presentamos el Registro Chileno de Técnicas de Reproducción Asistida realizadas en el año 2011. Siete centros reportaron un total de 1.918 ciclos de reproducción asistida: 161 ciclos de fecundación in vitro (FIV), 1.266 ciclos de inyección intracitoplasmática de espermatozoides (ICSI), 325 ciclos de transferencia de embriones criopreservados, y 166 ciclos de transferencia de embriones producto de ovodonación. La tasa de parto por aspiración en ciclos de FIV fue 18,6 por ciento y en ciclos de ICSI fue 22,0 por ciento. La tasa de parto por transferencia embrionaria en ciclos de transferencia de embriones criopreservados fue 21,5 por ciento; en ciclos de transferencia de embriones producto de ovodonación fue 41,9 por ciento. La edad promedio de las mujeres sometidas a ciclos de IVF/ICSI fue 35,7 años (rango: 22-48 años). El 38 por ciento de los ciclos iniciados fue en mujeres <34 años. A diferencia de años anteriores, la media de embriones transferidos no presentó una disminución, estabilizándose en 2,1. La frecuencia global de parto múltiple en IVF/ICSI fue 24 por ciento; 23 por ciento gemelar y 1 por ciento parto triple y mayor. Concluimos que la tasa de parto de los ciclos de IVF/ICSI se mantiene relativamente estable en relación a años anteriores. Gracias a la criopreservación y la transferencia secuencial de toda la cohorte de embriones producidos, la frecuencia de partos triple descendió considerablemente. Sin embargo, la alta frecuencia de parto doble no ha experimentado ninguna disminución y debe ser el próximo desafío.

We present the Chilean Registry of Assisted Reproductive Technologies performed in 2011. For the first time this registry is performed on a case-by-case basis. Seven centres reported 1,918 cycles: 161 in vitro fertilisation cases (IVF), 1,366 intracytoplasmatic sperm injection cases (ICSI), 325 cryiopreserved embryo transfers, and 158 oocyte donation cycles. The delivery rate per oocyte pick up for IVF and ICSI cycles was 18.6 percent and 22.0 percent, respectively. The delivery rate per embryo transfers for cryopreserved embryo transfer and oocyte donation were 21.5 percent and 41.9 percent, respectively. The mean age of woman undergoing IVF/ICSI was 35.7 years (min 22 max 48 years); 38 percent of initiated cycles were performed in women aged <34 years. As in previous years, the mean number of embryos transferred declined slightly, reaching 2.1. The multiple delivery rate was 24 percent: 23 percent twin and 1 percent triplet and higher. In conclusion the delivery rate in IVF/ICSI cycles remains stable. Thanks to cryopreservation and posterior embryo transfer, the rate of triplet-delivery continues to diminish. However, the rate of twin delivery has not diminished, and remains a challenge.

Atividades antioxidante, antinociceptiva e anti-inflamatória das folhas de Mucuna pruriens (L. ) DC / Antioxidant, antinociceptive and anti-inflammatory activity of Mucuna pruriens (L. ) DC. leaves

A espécie Mucuna pruriens (L.) DC. (Fabaceae) é popularmente conhecida no Brasil como "café berão" e "pó de mico". Suas sementes são bastante estudadas sendo empregadas na medicina popular para o tratamento de desordens nervosas e do aparelho reprodutor, porém poucas informações sobre a composição química e atividade farmacológica das folhas dessa espécie são descritas na literatura. Assim, os objetivos desse estudo foram: a determinação do perfil fitoquímico, a avaliação da atividade antioxidante in vitro, e a avaliação das atividades anti-inflamatória e antinociceptiva in vivo do extrato metanólico das folhas de M. pruriens nas concentrações de 100 e 300 mg/kg. O estudo fitoquímico foi realizado por meio da pesquisa qualitativa dos constituintes químicos e determinação quantitativa do teor de fenóis totais e flavonoides. O potencial antioxidante foi avaliado pelos métodos do DPPH e poder de redução. As atividades anti-inflamatória e antinociceptiva foram a ante foi promissor, com CI50 de 13,2∝g/mL pelo método do DPPH, e CE50 de 47,9∝g/mL pelo método que avalia o poder de redução. Em relação à atividade anti-inflamatória, o extrato foi capaz de inibir o edema de orelha em 63% (100mg/kg) e 28% (300mg/kg). Quanto à atividade antinociceptiva, houve redução do número de contorções abdominais de 64% (100 mg/kg) e 69% (300 mg/kg). Estes resultados indicam que M. pruriens apresenta um potencial farmacológico promissor e reforçam o conceito de que a pesquisa de plantas com usos etnofarmacológicos pode revelar um número substancial de respostas em ensaios in vitro e in vivo.

The species Mucuna pruriens (L.) DC. (Fabaceae) is popularly known in Brazil as "café berão" and "pó de mico". Its seeds have been widely studied and used in folk medicine for the treatment of nervous and reproductive system disorders; however, few studies are related to the chemical composition and pharmacological activity of its leaves. Therefore, the aims of this study were: investigation of the phytochemical profile, in vitro assessment of the antioxidant activity, and in vivo evaluation of the anti-inflammatory and antinociceptive activities of methanol extract of M. pruriens leaves at the concentrations of 100 and 300mg/kg. The phytochemical study was performed by means of qualitative identification of chemical constituents and quantitative determination of total phenols and flavonoids. The antioxidant potential was assayed by DPPH and reducing power methods. Anti-inflammatory and antinociceptive activities were evaluated by croton oil-induced ear edema and acetic acid-induced writhing tests, respectively. Alkaloids, coumarins, flavonoids, triterpenes and saponins were identified in the extract. Total phenol and flavonoid levels were 112 and 18.3mg/g extract, respectively. The antioxidant potential was promising, with IC50 of 13.2∝g/mL by DPPH assay and EC50 of 47.9∝g/mL by the method that evaluates the reducing power. Regarding the anti-inflammatory activity, the extract was capable of inhibiting by 63% (100mg/kg) and 28% (300mg / kg) the ear edema. As to the antinociceptive activity, there was a reduction in the number of writhings by 64% (100mg/kg) and 69% (300mg/kg). Results indicate that M. pruriens presents a promising pharmacological potential and reinforce the concept that the investigation of ethnopharmacologically used plants may reveal a substantial number of positive responses in in vitro and in vivo assays.

Perfil de ácidos graxos no leite de vacas holandês em pastagens tropicais suplementadas com dois níveis de concentrado / Milk fatty acids profile of Holstein cows grazing tropical forages supplemented with two concentrate levels

Milk fatty acids profile was evaluated using 12 Holstein cows producing 15 kg/day of milk with 4.0% of fat. The animals were assigned to four treatments in a 2 x 2 factorial arrangement (two tropical grasses - Brachiaria brizantha cv. Xaraés and Panicum maximum cv. Tanzania, supplemented with two concentrate levels - 3 and 6 kg/cow/day) in a completely randomized block design. There was no effect of forage and concentrate level (P>0.05) on concentrations of rumenic, vaccenic, (C18: 1 trans-11) and oleic acids in milk fat (mean values of 1.01, 1.79, and 22.55 g/100 g of total fatty acids, respectively). The concentrations of lauric (C12:0), myristic (C14:0), and palmitic (C16:0) acids were also unaffected by treatments (mean values of 2.63, 9.77, and 27.44g/100g of total fatty acids, respectively). Overall, the results illustrate the potential of tropical grasses in producing milk containing a more desirable fatty acids profile in terms of human health.

Perfil de ácidos graxos no leite de vacas Holandês em pastagens tropicais suplementadas com dois níveis de concentrado / Milk fatty acids profile of Holstein cows grazing tropical forages supplemented with two concentrate levels

Milk fatty acids profile was evaluated using 12 Holstein cows producing 15 kg/day of milk with 4.0% of fat. The animals were assigned to four treatments in a 2 x 2 factorial arrangement (two tropical grasses - Brachiaria brizantha cv. Xaraés and Panicum maximum cv. Tanzania, supplemented with two concentrate levels - 3 and 6 kg/cow/day) in a completely randomized block design. There was no effect of forage and concentrate level (P>0.05) on concentrations of rumenic, vaccenic, (C18: 1 trans-11) and oleic acids in milk fat (mean values of 1.01, 1.79, and 22.55 g/100 g of total fatty acids, respectively). The concentrations of lauric (C12:0), myristic (C14:0), and palmitic (C16:0) acids were also unaffected by treatments (mean values of 2.63, 9.77, and 27.44g/100g of total fatty acids, respectively). Overall, the results illustrate the potential of tropical grasses in producing milk containing a more desirable fatty acids profile in terms of human health.(AU)

Digestibilidade da matéria seca de silagens de milho e de suplementos concentrados determinada por procedimentos in vitro / Dry matter digestibility of corn silages and concentrates determined by in vitro procedures

Compararam-se os valores de digestibilidade in vitro da matéria seca (DIVMS) de quatro silagens de milho e de seis concentrados (três proteicos e três energéticos), determinados pelo método de dois estádios realizados em tubos individuais ou em equipamento automatizado de fermentação, e avaliou-se a ocorrência de efeito associativo na digestão de alimentos destas três classes incubadas em um mesmo jarro de fermentação da incubadora in vitro, ou em jarros diferentes contendo a mesma classe de alimentos. Utilizou-se delineamento inteiramente ao acaso, em esquema fatorial 3 x 3 (procedimentos in vitro x classes de alimentos). Os valores de DIVMS determinados pelo método dos tubos foram mais próximos dos relatados na literatura e menores (P<0,02) que os obtidos pelos procedimentos automatizados. Não houve diferença (P>0,05) nos valores de DIVMS dos concentrados e das silagens de milho incubados no mesmo jarro de fermentação da incubadora ou, separadamente por alimento, em jarros diferentes.

The values of in vitro dry matter digestibility (IVDMD) of four corn silages and six concentrates (three proteic and three energetics) were determined by the two-stage technique that utilizes individual digestion tubes and by an automatic equipment of fermentation (filter bag technique). It was also evaluated the associative effect on digestion of these three food classes when incubated in the same fermentation jar of the "in vitro incubator" and when in different vessels containing the same class of foods. The experimental design was completely randomized in a 3 x 3 factorial arrangement (in vitro procedures x food classes). The IVDMD values determined in tubes were closer to those found in the literature and lower (P<0.02) than those obtained by the automatic procedure. No differences were found (P>0.05) in IVDMD of concentrates and silages when incubated together in the same fermentation jar or separated by food classes in separated jars.

Digestibilidade da matéria seca de silagens de milho e de suplementos concentrados determinada por procedimentos in vitro / Dry matter digestibility of corn silages and concentrates determined by in vitro procedures

Compararam-se os valores de digestibilidade in vitro da matéria seca (DIVMS) de quatro silagens de milho e de seis concentrados (três proteicos e três energéticos), determinados pelo método de dois estádios realizados em tubos individuais ou em equipamento automatizado de fermentação, e avaliou-se a ocorrência de efeito associativo na digestão de alimentos destas três classes incubadas em um mesmo jarro de fermentação da incubadora in vitro, ou em jarros diferentes contendo a mesma classe de alimentos. Utilizou-se delineamento inteiramente ao acaso, em esquema fatorial 3 x 3 (procedimentos in vitro x classes de alimentos). Os valores de DIVMS determinados pelo método dos tubos foram mais próximos dos relatados na literatura e menores (P<0,02) que os obtidos pelos procedimentos automatizados. Não houve diferença (P>0,05) nos valores de DIVMS dos concentrados e das silagens de milho incubados no mesmo jarro de fermentação da incubadora ou, separadamente por alimento, em jarros diferentes.(AU)

The values of in vitro dry matter digestibility (IVDMD) of four corn silages and six concentrates (three proteic and three energetics) were determined by the two-stage technique that utilizes individual digestion tubes and by an automatic equipment of fermentation (filter bag technique). It was also evaluated the associative effect on digestion of these three food classes when incubated in the same fermentation jar of the "in vitro incubator" and when in different vessels containing the same class of foods. The experimental design was completely randomized in a 3 x 3 factorial arrangement (in vitro procedures x food classes). The IVDMD values determined in tubes were closer to those found in the literature and lower (P<0.02) than those obtained by the automatic procedure. No differences were found (P>0.05) in IVDMD of concentrates and silages when incubated together in the same fermentation jar or separated by food classes in separated jars.(AU)