Follicular dynamics, corpus luteum growth and regression in multiparous buffalo cows and buffalo heifers

ABSTRACT Objective. Characterize the follicular dynamics and luteal growth and regression pattern of multiparous (MB) and heifer (BH) Murrah buffaloes in Colombian tropical conditions. Material and methods. Ten MB and ten BH were synchronized with a progesterone-releasing intravaginal device. No artificial insemination was performed during the estrous and daily ultrasound examinations were performed 15 days later to determine the number and diameter of the structures present in both ovaries in the subsequent natural estrous cycle. The Student’s T test was used to evaluate differences between MB and BH. All data are presented as mean ± standard deviation. Results. The length of the estrous cycle was 22.00±4.50 days for MB and 22.00±2.70 days for BH. Follicular growth occurs in one (n=1; 5.89%), two (n=14; 82.35%) or three waves (n=2; 11.76%). The first wave initiated the day after ovulation with the recruitment of 8.33±2.06 and 10.00±2.72 follicles in MB and BH, while the second wave started on day 11.00±2.00 and 10.50±2.82, presenting 8.37±2.26 and 8.00±1.51 follicles. The third wave began on day 16.21±3.10 showing 6.50±1.70 follicles, only BM had three waves. The maximum luteal diameter was 19.58±4.16 mm and 17.74±3.32 mm respectively. There were no significant differences between the groups for these variables. Conclusions. These results show that the follicular development in buffaloes occurs in waves, where two waves is the most common pattern, as previously reported by other authors

Impact of COVID-19 on cardiovascular testing in the United States versus the rest of the world

Objectives: This study sought to quantify and compare the decline in volumes of cardiovascular procedures between the United States and non-US institutions during the early phase of the coronavirus disease-2019 (COVID-19) pandemic. Background: The COVID-19 pandemic has disrupted the care of many non-COVID-19 illnesses. Reductions in diagnostic cardiovascular testing around the world have led to concerns over the implications of reduced testing for cardiovascular disease (CVD) morbidity and mortality. Methods: Data were submitted to the INCAPS-COVID (International Atomic Energy Agency Non-Invasive Cardiology Protocols Study of COVID-19), a multinational registry comprising 909 institutions in 108 countries (including 155 facilities in 40 U.S. states), assessing the impact of the COVID-19 pandemic on volumes of diagnostic cardiovascular procedures. Data were obtained for April 2020 and compared with volumes of baseline procedures from March 2019. We compared laboratory characteristics, practices, and procedure volumes between U.S. and non-U.S. facilities and between U.S. geographic regions and identified factors associated with volume reduction in the United States. Results: Reductions in the volumes of procedures in the United States were similar to those in non-U.S. facilities (68% vs. 63%, respectively; p = 0.237), although U.S. facilities reported greater reductions in invasive coronary angiography (69% vs. 53%, respectively; p < 0.001). Significantly more U.S. facilities reported increased use of telehealth and patient screening measures than non-U.S. facilities, such as temperature checks, symptom screenings, and COVID-19 testing. Reductions in volumes of procedures differed between U.S. regions, with larger declines observed in the Northeast (76%) and Midwest (74%) than in the South (62%) and West (44%). Prevalence of COVID-19, staff redeployments, outpatient centers, and urban centers were associated with greater reductions in volume in U.S. facilities in a multivariable analysis. Conclusions: We observed marked reductions in U.S. cardiovascular testing in the early phase of the pandemic and significant variability between U.S. regions. The association between reductions of volumes and COVID-19 prevalence in the United States highlighted the need for proactive efforts to maintain access to cardiovascular testing in areas most affected by outbreaks of COVID-19 infection

Follicular dynamics, corpus luteum growth and regression in multiparous buffalo cows and buffalo heifers

Objective. Characterize the follicular dynamics and luteal growth and regression pattern of multiparous (MB) and heifer (BH) Murrah buffaloes in Colombian tropical conditions. Material and methods. Ten MB and ten BH were synchronized with a progesterone-releasing intravaginal device. No artificial insemination was performed during the estrous and daily ultrasound examinations were performed 15 days later to determine the number and diameter of the structures present in both ovaries in the subsequent natural estrous cycle. The Student�s T test was used to evaluate differences between MB and BH. All data are presented as mean ± standard deviation. Results. The length of the estrous cycle was 22.00±4.50 days for MB and 22.00±2.70 days for BH. Follicular growth occurs in one (n=1; 5.89%), two (n=14; 82.35%) or three waves (n=2; 11.76%). The first wave initiated the day after ovulation with the recruitment of 8.33±2.06 and 10.00±2.72 follicles in MB and BH, while the second wave started on day 11.00±2.00 and 10.50±2.82, presenting 8.37±2.26 and 8.00±1.51 follicles. The third wave began on day 16.21±3.10 showing 6.50±1.70 follicles, only BM had three waves. The maximum luteal diameter was 19.58±4.16 mm and 17.74±3.32 mm respectively. There were no significant differences between the groups for these variables. Conclusions. These results show that the follicular development in buffaloes occurs in waves, where two waves is the most common pattern, as previously reported by other authors.Objetivo. Caracterizar la dinámica folicular y el patrón de crecimiento y regresión del cuerpo lúteo de búfalas multíparas (BM) y búfalas novillas (BN) de la raza Murrah en condiciones del trópico colombiano. Materiales y métodos. Diez BM y diez BN fueron sincronizadas con dispositivo intravaginal de liberación de progesterona. No se realizó la inseminación artificial al momento del celo y 15 días después se inició el seguimiento ultrasonográfico para determinar el número y diámetro de las estructuras presentes en ambos ovarios en el subsecuente ciclo estral natural. Las diferencias entre BM y BN se evaluaron con pruebas T. Los datos se presentan como media ± desviación estándar. Resultados. La duración del ciclo estral fue de 22.00±4.50 y 22.00±2.70 días en BM y BN. El crecimiento folicular ocurrió en una (n=1; 5.89%), dos (n=14; 82.35%) o tres (n=2; 11.76%) ondas. La primera onda inicio el día siguiente a la ovulación con el reclutamiento de 8.33±2.06 y 10.00±2.72 folículos en BM y BN, mientras que la segunda onda inicio el día 11.00±2.00 y 10.50±2.82 con 8.37±2.26 y 8.00±1.51 folículos. La tercera onda inicio el día 16.21±3.10 con 6.50±1.70 folículos, sólo BM presentaron tres ondas. El diámetro máximo luteal fue de 19.58±4.16 mm y 17.74±3.32 mm. No se observaron diferencias significativas entre los grupos para estas variables. Conclusiones. Los resultados muestran que el desarrollo folicular de las búfalas se dio en ondas, siendo dos ondas el patrón más común, similar a lo reportado por otros autores

Detection and quantification of corn starch and wheat flour as adulterants in milk powder by near- and mid-infrared spectroscopy coupled with chemometric routines

Adulterating foods, such as milk powder (MP), is a common practice in countries with no rigid policy on food quality control. This study employs Fourier transform near-infrared and mid-infrared (FT-NIR, FT-MIR) spectroscopy and chemometric analysis to detect milk powder adulteration with corn starch (CS) and wheat flour (WF) from 0.00 to 30.00% w/w concentrations. Partial least square regression (PLSR) models were developed, optimized, and compared to quantify corn starch and wheat flour adulterations. According to the results, the root mean square error prediction (RMSEP) for FT-NIR and FT-MIR in corn starch was 0.74 and 1.69% w/w and 0.82 and 2.63% w/w for wheat flour, respectively. FT-NIR spectroscopy, rather than FT-MIR coupled with the appropriate chemometrics models represents a more valuable tool for simple, rapid, and nondestructive detection of adulterants in milk powder. The recent availability of portable instruments, combined with suitable chemometric tools, makes it possible to discriminate adulterated food samples in situ

Ecuador : debates, balances y desafíos post-progresistas

Los progresismos nacieron en medio de, o como el resultado de la devastación provocada por el neoliberalismo y caminaron sobre el cascajo de los partidos tradicionales. En Ecuador, el gobierno de la denominada "Revoluvión Ciudadana" fue un intenso fenómeno político de más de una década que cultivó varios éxitos electorales y sociales. Su promesa emergió en medio de una crisis profunda que había quebrado la hegemonía política de las élites y desgastado los engranajes del sistema político representativo. Las páginas de este libro, fruto de un extraordinario esfuerzo colectivo, ensayan una explicación sobre los significados y herencias de los gobiernos progresistas con un énfasis especial en la experiencia ecuatoriana, atendiendo a los profundos efectos que tuvieron en la sociedad, la economía y los Estados de los países involucrados. Al mismo tiempo, este libro aborda los primeros signos del ciclo post-progresista en el que emerge el neogolpismo, el Estado de excepción, la anti-política tanto como la emergencia de fuerzas alternativas. Ecuador. Balances, debates y desafíos post-progresistas propone un acercamiento plural y crítico sobre el presente histórico del Ecuador a través de lecturas que conjugan perspectivas locales, nacionales y regionales

Ciencia, tecnología y sociedad en América Latina : la mirada de las nuevas generaciones

Los estudios sociales en ciencia y tecnología en América Latina cuentan ya con medio siglo de desarrollo en la región. El origen del campo en los años sesenta dotó de características propias que permanecieron, a lo largo de las décadas con diferentes niveles de intensidad, en el marco de nuevos modelos y formas de pensar el desarrollo y de afrontar las condiciones de pobreza y exclusión de nuestras sociedades. Una vez recorrida la etapa de profesionalización del campo y en diálogo con la dinámica de construcción de estos estudios en los países del norte se retomaron desde nuevas preguntas y perspectivas aquellas reflexiones iniciadas en los años sesenta, al tiempo que se generaron esfuerzos por construir miradas originales sobre los significados sociales, económicos y políticos de la ciencia y la tecnología. Así se construyeron enfoques y perspectivas analíticas que aprovechan los aportes del campo a nivel internacional y los alimentan con perspectivas regionales. Ciencia, tecnología y sociedad en América Latina está organizado en cinco secciones variadas y heterogéneas, referidas todas ellas a América Latina, en las que se discuten problemas sociales muy diversos. El rico caudal de estas investigaciones sostiene como objetivo común la superación del atraso y de la dependencia de nuestros países, y la búsqueda de estrategias adecuadas en pos de mejorar las condiciones de vida en la región. Con una perspectiva múltiple e interdisciplinar, investigadores jóvenes del continente muestran la riqueza y la relevancia de los estudios actuales en este campo

Biodiversidad en la cuenca del Orinoco II. Áreas prioritarias para la conservación y uso sostenible

El presente libro avanza notablemente en la búsqueda de respuestas que nos lleven a una mejor comprensión no solo de la Orinoquia, sino de nuestra responsabilidad institucional y social con este territorio de importancia global, responsabilidad que debe partir del reconocimiento general de que la Orinoquia no es un recurso ilimitado, sino un hábitat rico y complejo, y que toda intervención debe tener como objetivo que lo siga siendo para beneficio de todos, hoy y siempre

Imaginarios sociales y memorias : itinerarios de América Latina

El libro que presentamos busca destacar algunas de estas problemáticas superando la concepción unívoca de la historia como modernidad/colonialidad homogeneizante, plantear su conocimiento bajo un nuevo paradigma científico civilizatorio transcultural que nos permita conocer la problemática en la unidad de sus heterogeneidades. Afirmar una nueva agenda de investigación de los imaginarios y memorias en diálogo inter e intracivilizatorio global. He ahí la importancia teórica y práctica de la presente publicación, porque resalta algunas de sus problemáticas centrales y saca a la luz su significado político, mientras afirma la democracia en nuestras sociedades. Son esfuerzos creativos que siembran un nuevo horizonte histórico de sentido civilizatorio de vida uniendo lo que la modernidad/colonialidad separó: lo verdadero, lo bueno y lo bello

XVII International Congress of Control Electronics and Telecommunications: "Advanced Science, Technology and Innovation to move towards a new socio-technical system: Sustainable Social Transformation"

Contenido: Approach to the diagnostic of cesarean birth using bio-inspired models. ; Design of a tool in a virtual reality environment to manipulate anatomical models. ; The effect of COVID-19 restrictions on the electricity price forecasting models. ; Depression prevention through artificial intelligence. ; State of the art in Prototypes as complements to the learning of the Colombian Sign Language (LSC). ; A computational proposal for gene expression deterministic analysis in associated disorders to depression and anxiety. ; Evaluation of postural stability from the predictability of the measurement of the center of pressure. ; Psychophysiological Analysis of Sound Stimuli.; Delphi method for the identification of relevant variables in the development of low-power photovoltaic solar projects. ; Socioeconomic impact of a refrigerator powered by a photovoltaic system in La Guajira. ; Energy Efficiency: characteristics that allow the reduction of greenhouse gases in. ; Possibilities for the implementation of a bioreactor from organic waste. ; Energy Potential with Small Hydroelectric Power Plants in Non- interconnected Zones of Colombia. ; Energy Potential in Photovoltaic Solar Solutions in Non-Interconnected Areas of Colombia. ; Photovoltaic system, towards the energy transition from home. ; Blockchain model to increase the transparency of public sector processes. ; Intelligent agricultural irrigation prescription system based on sensor networks and crop modeling. ; Design and implementation of a digital modulation classification system using intelligent algorithms. ; A mobile application proposal to minimize intermediation during agricultural process distribution of products in supply chain. ; Accompanying strategy for the social appropriation of new technologies in vulnerable agricultural communities: case in communities producing Gulupas fruits (Passiflora edulis Sims). ; Predictive model of transparency as an indicator of Public Policies. ; Smart system for recognition of ripening level in blackberry fruits. ; Project-based learning as an alternative methodology for technological education in electronics. ; Design and construction of an automated system for N. ; Four bar mechanisms (FBM) and their Software-Based applications: a reviewFT aquaponic culture of Red Carp and Crespa Lettuce. ; Intelligent search implementation for the construction of states of the art: a python application. ; Indoor and Outdoor propagation models on 5G environments: state of the art. ;The electronic detection of offenders (DOO) in the District Secretary of mobility of Bogotá: a step forward in the configuration of the concept of digital citizenship in Colombia. ; Monitoring through ICT of Mobility: technological collaborative feature to incorporate IoT in a Smart City. ; Characterization model of asphalt mixtures using digital image processing. ; Review: identification of diseases and/or pests in fruit trees through image processing techniques and artificial intelligence. ; VRS applicated to Nasa Yuwe language. ; Application of Pix2Pix for edge reconstruction in images. ; Brushless DC Motor Control System for Active Myoelectric Prosthesis. ; Implementation of a Water Conductivity Measuring System. ; 2 DOF robot programmed with MatLab® (guide and Peter Corke) and Arduino uno for writing alphabetical characters. ; Simulator of the behavior of the center of mass in a quadruped robot. ; Biomimetic prototype for flapping movement of batsContent: Contenido: Approach to the diagnostic of cesarean birth using bio-inspired models. ; Design of a tool in a virtual reality environment to manipulate anatomical models. ; The effect of COVID-19 restrictions on the electricity price forecasting models. ; Depression prevention through artificial intelligence. ; State of the art in Prototypes as complements to the learning of the Colombian Sign Language (LSC). ; A computational proposal for gene expression deterministic analysis in associated disorders to depression and anxiety. ; Evaluation of postural stability from the predictability of the measurement of the center of pressure. ; Psychophysiological Analysis of Sound Stimuli.; Delphi method for the identification of relevant variables in the development of low-power photovoltaic solar projects. ; Socioeconomic impact of a refrigerator powered by a photovoltaic system in La Guajira. ; Energy Efficiency: characteristics that allow the reduction of greenhouse gases in. ; Possibilities for the implementation of a bioreactor from organic waste. ; Energy Potential with Small Hydroelectric Power Plants in Non- interconnected Zones of Colombia. ; Energy Potential in Photovoltaic Solar Solutions in Non-Interconnected Areas of Colombia. ; Photovoltaic system, towards the energy transition from home. ; Blockchain model to increase the transparency of public sector processes. ; Intelligent agricultural irrigation prescription system based on sensor networks and crop modeling. ; Design and implementation of a digital modulation classification system using intelligent algorithms. ; A mobile application proposal to minimize intermediation during agricultural process distribution of products in supply chain. ; Accompanying strategy for the social appropriation of new technologies in vulnerable agricultural communities: case in communities producing Gulupas fruits (Passiflora edulis Sims). ; Predictive model of transparency as an indicator of Public Policies. ; Smart system for recognition of ripening level in blackberry fruits. ; Project-based learning as an alternative methodology for technological education in electronics. ; Design and construction of an automated system for N. ; Four bar mechanisms (FBM) and their Software-Based applications: a reviewFT aquaponic culture of Red Carp and Crespa Lettuce. ; Intelligent search implementation for the construction of states of the art: a python application. ; Indoor and Outdoor propagation models on 5G environments: state of the art. ;The electronic detection of offenders (DOO) in the District Secretary of mobility of Bogotá: a step forward in the configuration of the concept of digital citizenship in Colombia. ; Monitoring through ICT of Mobility: technological collaborative feature to incorporate IoT in a Smart City. ; Characterization model of asphalt mixtures using digital image processing. ; Review: identification of diseases and/or pests in fruit trees through image processing techniques and artificial intelligence. ; VRS applicated to Nasa Yuwe language. ; Application of Pix2Pix for edge reconstruction in images. ; Brushless DC Motor Control System for Active Myoelectric Prosthesis. ; Implementation of a Water Conductivity Measuring System. ; 2 DOF robot programmed with MatLab® (guide and Peter Corke) and Arduino uno for writing alphabetical characters. ; Simulator of the behavior of the center of mass in a quadruped robot. ; Biomimetic prototype for flapping movement of bat