bluuebunny/crossref_metadata_2025 huggingface dataset:
Entropy Analysis for Cilia-Generated Motion of Cu-Blood Flow of Nanofluid in an Annulus
Authors: Riaz Arshad , Bobescu Elena , Ramesh Katta , Ellahi Rahmat
Published: December 2021

In this study, a novel model of entropy generation effects measured in the Cu-blood flow of a nanofluid under the effect of ciliary-oriented motion is proposed. The effects of viscous dissipation are also taken into account. The physical model was composed with the incorporation of a low Reynolds number and long-wavelength phenomena. The exact solutions for the axial velocity, temperature and pressure gradient distribution were achieved successfully. Key findings are presented through a strategy of plotting the significant factors affecting the physical quantities of the stream. It was found that the heat absorption parameter and Brownian motion accounted for the large thermal transfer rate, while the effect of entropy was minimal compared to these factors in the center of the flow but increased on the walls in the case of Cu-blood flow. It can also be added that a more intense flow gave rise to the entropy effects. This study may be helpful in medical science as cilia play vital roles, which include cell migration and external fluid transport, in human tissues and some key organs. Moreover, the considered annulus-shaped geometry gives vital readings that are used in medical equipment such as endoscopes.
A Generalized Class of Functions Defined by the q-Difference Operator
Authors: Andrei Loriana , Caus Vasile-Aurel
Published: December 2021

The goal of the present investigation is to introduce a new class of analytic functions (Kt,q), defined in the open unit disk, by means of the q-difference operator, which may have symmetric or assymetric properties, and to establish the relationship between the new defined class and appropriate subordination. We derived relationships of this class and obtained sufficient conditions for an analytic function to be Kt,q. Finally, in the concluding section, we have taken the decision to restate the clearly-proved fact that any attempt to create the rather simple (p,q)-variations of the results, which we have provided in this paper, will be a rather inconsequential and trivial work, simply because the added parameter p is obviously redundant.
Topological Doping and Superconductivity in Cuprates: An Experimental Perspective
Authors: Tranquada John M.
Published: December 2021

Hole doping into a correlated antiferromagnet leads to topological stripe correlations, involving charge stripes that separate antiferromagnetic spin stripes of opposite phases. The topological spin stripe order causes the spin degrees of freedom within the charge stripes to feel a geometric frustration with their environment. In the case of cuprates, where the charge stripes have the character of a hole-doped two-leg spin ladder, with corresponding pairing correlations, anti-phase Josephson coupling across the spin stripes can lead to a pair-density-wave order in which the broken translation symmetry of the superconducting wave function is accommodated by pairs with finite momentum. This scenario is now experimentally verified by recently reported measurements on La2−xBaxCuO4 with x=1/8. While pair-density-wave order is not common as a cuprate ground state, it provides a basis for understanding the uniform d-wave order that is more typical in superconducting cuprates.
Fish Cytolysins in All Their Complexity
Authors: Campos Fabiana V. , Fiorotti Helena B. , Coitinho Juliana B. , Figueiredo Suely G.
Published: December 2021

The majority of the effects observed upon envenomation by scorpaenoid fish species can be reproduced by the cytolysins present in their venoms. Fish cytolysins are multifunctional proteins that elicit lethal, cytolytic, cardiovascular, inflammatory, nociceptive, and neuromuscular activities, representing a novel class of protein toxins. These large proteins (MW 150–320 kDa) are composed by two different subunits, termed α and β, with about 700 amino acid residues each, being usually active in oligomeric form. There is a high degree of similarity between the primary sequences of cytolysins from different fish species. This suggests these molecules share similar mechanisms of action, which, at least regarding the cytolytic activity, has been proved to involve pore formation. Although the remaining components of fish venoms have interesting biological activities, fish cytolysins stand out because of their multifunctional nature and their ability to reproduce the main events of envenomation on their own. Considerable knowledge about fish cytolysins has been accumulated over the years, although there remains much to be unveiled. In this review, we compiled and compared the current information on the biochemical aspects and pharmacological activities of fish cytolysins, going over their structures, activities, mechanisms of action, and perspectives for the future.
Group Vaccination Five Days before a COVID-19 Outbreak in a Long-Term Care Facility
Authors: Pletz Mathias W. , Trommer Sabine , Kolanos Steffi , Rose Norman , Kinne Veit , Spott Riccardo , Baier Michael , Lange Isabel
Published: December 2021

Rapid vaccination may be of benefit in long-term care facilities (LTCF) that are affected by an ongoing COVID-19 outbreak. However, there are concerns regarding the safety and effectiveness of such an approach, particularly regarding the vaccination of pre-symptomatic patients. Here, we report the effectiveness of vaccination in a German LTCF hit by an outbreak that was detected 5 days after the first vaccine doses were administered. In detail, 66.7% of the unvaccinated patients experienced an unfavorable course; this proportion was much lower (33.3%) among the vaccinated patients. Even though this study is limited by a small number of patients, the observation and the comparison with related published data shows that vaccination (i) is safe and (ii) may still be of benefit when given shortly before an infection or even in pre-symptomatic LTCF-patients.
COVID-19 Vaccination Acceptance among Health Science Students in Morocco: A Cross-Sectional Study
Authors: Khalis Mohamed , Boucham Mouna , Luo Amy , Marfak Abdelghafour , Saad Soukaina , Mariama Aboubacar Camara , Ait El Haj Soukaina , Jallal Manar , Aazi Fatima-Zahra , Charaka Hafida , Nejjari Chakib
Published: December 2021

While students in the health sciences occupy pivotal roles in the Moroccan COVID-19 response and vaccination campaigns, factors associated with COVID-19 vaccine acceptability among students have not been reported. This study aimed to determine the willingness and identify predictive attitudes and beliefs of COVID-19 vaccine acceptance among health science students in Morocco. A cross-sectional, self-administered online questionnaire was conducted among students of the Mohammed VI University of Health Sciences in Casablanca, Morocco in January 2021. In total, 1272 students participated. Univariate and multivariate logistic regression models were used to calculate odds ratios and 95% confidence intervals. Overall, 26.9% of participants reported being willing to receive the COVID-19 vaccine. Between genders, male students were more likely to accept the vaccine. Regarding individual attitudes and beliefs about COVID-19 infection, students with greater confidence in COVID-19 information, and higher perceived likelihood and perceived severity of infection were more likely to be willing to get the vaccine. Concerning a COVID-19 vaccine, students who reported lower levels of perceived harm and higher levels of perceived vaccine effectiveness were more willing to get vaccinated. Our findings help guide future efforts to tailor communication and identify strategies to increase COVID-19 vaccine uptake among students.
Does Influenza Vaccination during Pregnancy Have Effects on Non-Influenza Infectious Morbidity? A Systematic Review and Meta-Analysis of Randomised Controlled Trials
Authors: Hansen Katrine Pedersbæk , Benn Christine Stabell , Aamand Thomas , Buus Martin , da Silva Isaquel , Aaby Peter , Fisker Ane Bærent , Thysen Sanne Marie
Published: December 2021

The recommendation to provide inactivated influenza vaccine (IIV) to pregnant women is based on observed protection against influenza-related morbidity in mother and infant. Non-live vaccines may have non-specific effects (NSEs), increasing the risk of non-targeted infections in females. We reviewed the evidence from available randomised controlled trials (RCTs) of IIV to pregnant women, to assess whether IIV may have NSEs. Four RCTs, all conducted in low- and middle-income settings, were identified. We extracted information on all-cause and infectious mortality and adverse events in women and their infants. We conducted meta-analyses providing risk ratios (RR). The meta-analysis for maternal all-cause mortality provided a RR of 1.48 (95% CI = 0.52–4.16). The estimates for miscarriage/stillbirth and infant all-cause mortality up to 6 months of age were 1.06 (0.78–1.44) and 1.11 (0.87–1.41), respectively. IIV was associated with a higher risk of non-influenza infectious adverse events, with meta-estimates of 2.01 (1.15–3.50) in women and 1.36 (1.12–1.67) in infants up to 6 months of age. Thus, following a pattern seen for other non-live vaccines, IIV was associated with a higher risk of non-influenza infectious adverse events. To ensure that scarce resources are used well, and no harm is inflicted, further RCTs are warranted.
Evaluating the Pressure and Loss Behavior in Water Pipes Using Smart Mathematical Modelling
Authors: Altowayti Wahid Ali Hamood , Othman Norzila , Tajarudin Husnul Azan , Al-Dhaqm Arafat , Asharuddin Syazwani Mohd , Al-Gheethi Adel , Alshalif Abdullah Faisal , Salem Ali Ahmed , Din Mohd Fadhil Md , Fitriani Nurina , AL-Towayti Faris Ali Hamood
Published: December 2021

Due to the constant need to enhance water supply sources, water operators are searching for solutions to maintain water quality through leakage protection. The capability to monitor the day-to-day water supply management is one of the most significant operational challenges for water companies. These companies are looking for ways to predict how to improve their supply operations in order to remain competitive, given the rising demand. This work focuses on the mathematical modeling of water flow and losses through leak openings in the smart pipe system. The research introduces smart mathematical models that water companies may use to predict water flow, losses, and performance, thereby allowing issues and challenges to be effectively managed. So far, most of the modeling work in water operations has been based on empirical data rather than mathematically described process relationships, which is addressed in this study. Moreover, partial submersion had a power relationship, but a total immersion was more likely to have a linear power relationship. It was discovered in the experiment that the laminar flows had Reynolds numbers smaller than 2000. However, when testing with transitional flows, Reynolds numbers were in the range of 2000 to 4000. Furthermore, tests with turbulent flow revealed that the Reynolds number was more than 4000. Consequently, the main loss in a 30 mm diameter pipe was 0.25 m, whereas it was 0.01 m in a 20 mm diameter pipe. However, the fitting pipe had a minor loss of 0.005 m, whereas the bending pipe had a loss of 0.015 m. Consequently, mathematical models are required to describe, forecast, and regulate the complex relationships between water flow and losses, which is a concept that water supply companies are familiar with. Therefore, these models can assist in designing and operating water processes, allowing for improved day-to-day performance management.
The Human Right to Water and Sanitation: Using Natural Language Processing to Uncover Patterns in Academic Publishing
Authors: Faulkner Christopher Michael , Lambert Joshua Earl , Wilson Bruce M. , Faulkner Matthew Steven
Published: December 2021

After years of advocacy and international negotiation, the General Assembly of the United Nations voted to officially recognize a stand-alone human right to water and sanitation on 28 July 2010. Since, academic scholarship has continued to grow in an effort to understand the implications of the codification of this human right. Yet, with this growth, it has become impractical if not impossible for scholars to keep up with the advancement of academic knowledge or to make sense of it in a systematic way. In short, to date, we know very little about the trends in the literature as they have unfolded over the past thirty years and the topics to which scholars have devoted significant attention within the broader field, particularly over time. This is an important area of inquiry, as developing a comprehensive understanding of where prior literature has focused and where it appears to be going offers scholars an opportunity to identify areas in need of refinement and/or increased attention. Given the practicalities of reading thousands of research papers each year, this project utilizes natural language processing (NLP) to identify topics and trends in academic literature on the human right to water and sanitation (HRtWS). NLP provides the opportunity to digest large quantities of text data through machine learning, culminating with descriptive information on trends and topics in the field since 1990. The results of this exercise show that the research related to the human right to water and sanitation has grown exponentially, particularly over the last decade, illustrates the multidisciplinary nature of the literature, and demonstrates the diversity of topics in the field.
Analytical Solutions to Conservative and Non-Conservative Water Quality Constituents in Water Distribution System Storage Tanks
Authors: Abrha Biniam , Ostfeld Avi
Published: December 2021

Water storage tanks are one of the primary and most critical components of water distribution systems (WDSs), which aim to manage water supply by maintaining pressure. In addition, storage provides a surplus source of water in case of an emergency. To gain the mentioned advantages, storage tanks are incorporated in most WDSs. Despite these advantages, storage can also pose negative impacts on water quality, thereby affecting water utilities. Water quality problems are a result of longer residency times and inadequate water mixing. This study aimed to construct a model of a tank’s water quantity and quality by formulating and solving governing equations based on inlet/outlet configurations and processes that influence the movement of water and chemical substances inside it. We used a compartment model to characterize the mixing behavior inside a tank. A water quality simulation model with different compartment arrangements was explored for extended filling and draining of storage, which was further validated using a previously published case study.
Parametric Predictions for Pure Electric Vehicles
Authors: Adedeji Bukola Peter
Published: December 2021

Demand for pure electric vehicles has been found to be increasing over the years. This has necessitated the development of a model that would serve as a predicting machine for manufacturing different types of pure electric vehicles. Direct Artificial Neural Network approach was used for predictions of nine different parameters commonly found in pure electric cars. Predictions were found to be of high degree of accuracy while using unit and overall model errors as the basis of performance measurement. The mean absolute error, mean square error and root mean square error of the model were 0.109, 0.218 and 0.467, respectively, when the combined electric charge consumption was used for modeling. For the model formation, using the same variable, the losses for the training and testing were 3.9132 × 10−6 and 9.698 × 10−7, respectively. The model was also evaluated using redefined datasets. The developed model can be used by manufacturers and engineers to simulate future designs when certain parameters are given.
Efecto del pH y la salinidad en el crecimiento y luminiscencia de una bacteria marina como biosensor ambiental
Authors: Pérez Lemes Vener , Delgado Gómez Yolaine
Published: December 2021

Effect of pH and salinity on the growth and luminescence of a marine bacterium as an environmental biosensor

Resumen                  

El trabajo se desarrolló en el Centro de Estudios de Proteínas de la Facultad de Biología de la Universidad de La Habana en septiembre de 2012 con el objetivo de evaluar el crecimiento y la luminiscencia de la cepa bacteriana CBM-784 en el medio LM a diferentes intervalos de pH y salinidad y determinar los rangos óptimos para sus crecimiento y luminiscencia. Los resultados demuestran que la bacteria luminiscente CBM-784 mostró su mejor crecimiento y luminiscencia a pH= 8,3 y concentraciones de NaCl entre 2,95 y 3,5%.

Palabras clave: bacterias; ecología marina; luciferase; luminiscencia bacteriana; medio de cultivo.

Abstract

The work was developed at the Center for Protein Studies of the Faculty of Biology of the University of Havana in September 2012 with the objective of evaluating the growth and luminescence of the bacterial strain CBM-784 in the LM medium at different intervals of pH and salinity and to determine the optimal ranges for its growth and luminescence. The results demonstrate that the luminescent bacterium CBM-784 showed its best growth and luminescence at pH = 8.3 and NaCl concentrations between 2.95 and 3.5%.

Keywords: bacteria; marine ecology; luciferase; bacterial luminescence; culture medium.
Cuantificación de la recarga de agua en el sistema de riego Catarama mediante Modelo Renata
Authors: Jiménez Valencia Govanny , Félix Mera John Enrique , Alarcón Loor Jose Ramón
Published: December 2021

Cuantification of Catarama irrigation system recharge by Renata Model

Resumen

El objetivo de la investigación es cuantificar la recarga de agua generada en el sistema de riego Catarama (Cuenca del río Catarama) perteneciente a la provincia de Los Ríos (Ecuador), mediante la aplicación del modelo numérico RENATA (Recarga NATural a los Acuíferos) desarrollado por el Instituto Geológico y Minero de España (IGME) y la Diputación de Alicante. En el estudio se calculan los volúmenes de agua que son generados por la infiltración ocasionada por la lluvia y por el retorno de riego proveniente de las dotaciones de agua asignadas a los diferentes cultivos existentes en la zona. Para la determinación de la recarga se consideraron diferentes variables climáticas influyentes como precipitación, temperatura, evapotranspiración potencial y real; así como las diferentes características de los suelos del sector. A partir de estas variables RENATA pudo generar los resultados de la modelación en el sistema de riego, en base a los datos obtenidos de series climáticas mensuales correspondientes al periodo enero 2005 - diciembre 2014, obteniendo durante este tiempo una recarga teórica de 57,139 Hm3 en un área total aproximada de 6047 ha.

Palabras clave: RENATA; variable; precipitación; recarga; infiltración; riego.

Abstract

In this article, the water recharge in the Catarama irrigation system (Catarama river basin), Los Ríos, Ecuador is quantified through the application of the RENATA numerical model (Natural Aquifer recharge) developed by the Instituto Geológico y Minero de España (IGME) and Diputación de Alicante. The study calculates the volumes of water generated by the infiltration caused by rainfull and the return of irrigation from the water assigned to the different crops in the area. To determine the recharge, different influential climatic variables were considered: precipitation, temperature, potential and the current evapotranspiration; as well as the different characteristics of the sector’s soils. From these variables, RENATA was able to generate the results of the irrigation system modeling, based on the data obtained from monthly climatic series corresponding to the period January 2005 - December 2014, getting during this time a theoretical recharge of 57,139 Hm3, in an approximate total area of 6047 ha.

Keywords: RENATA; Variable; Precipitation; Recharge; Infiltration; Irrigation.
Comportamiento productivo y reproductivo de vacas Nelore de diferentes edades en un sistema a pastoreo del trópico boliviano
Authors: Ikeda Atsuko , Garzón Juan Pablo , Macías Rodríguez Edis , Marini Pablo Roberto
Published: December 2021

Productive and reproductive behavior of Nelore cows of different ages in a grazing system of the Bolivian tropics

Resumen

El objetivo del trabajo fue evaluar el comportamiento productivo y reproductivo de vacas adultas y en crecimiento de la raza Nelore en condiciones de pastoreo del trópico boliviano. El trabajo de investigación se realizó de octubre de 2016 a octubre de 2017 en la Hacienda Ganadería E7, Santa Cruz, Bolivia. Se utilizaron 100 vacas para el estudio. Se dividieron en dos grupos: Grupo adulto: GA, 28 vacas ≥ 5 años de edad y Grupo en crecimiento: GC, 72 vacas ≤ 5 años de edad. Los pesos entre ambos grupos analizados para GA y GC mostraron diferencia entre ellas (p≤0,05) durante todo el ensayo. Las vacas adultas tuvieron los menores intervalo parto-parto (GA: 380±28; GC: 506 ±18 días, p≤0,003), El estado corporal entre ambos grupos analizados también mostró diferencias entre los grupos (p≤0,05) el mejor estado corporal (GA: 2,4±0,06; GC: 2,2±0,02, p≤0,002), el mayor peso vivo adulto (GA: 461 ±7; GC: 418±5 kg, p≤0,0001) y mayor peso del ternero sin mostrar diferencias p≥0,05 (GA: 34,1±0,8; GC: 32,3±0,5 kg). Se concluye que las vacas adultas poseen un mejor comportamiento productivo y reproductivo, y además sería importante mantener en el rodeo un porcentaje mayor de ellas para los sistemas estudiados.

Palabras clave: peso adulto; estado corporal; intervalo parto-parto: peso el ternero al nacimiento

Abstract

The objective of the work was to evaluate the productive and reproductive behavior of adult and growing cows of the Nelore race under grazing conditions of the Bolivian tropics. The research work was carried out from October 2016 to October 2017 at rancher farm E7 in Colonia San Juan, Santa Cruz, Bolivia. 100 total cows were used for the study. They were divided into two groups: Adult group: GA, 28 cows ≥ 5 years of life and Growing group: GC, 72 cows ≤ to 5 years of life. The weights between both groups analyzed for GA and GC showed differences between them (p≤0.05) throughout the trial. The body condition between both groups analyzed also showed differences between the groups (p≤0.05). Adult cows had the lowest calving interval (GA: 380 ± 28, GC: 506 ± 18 days, p≤0.003), the best body condition (GA: 2.4 ± 0.06, GC: 2.2 ± 0.02, p≤0.002), the highest live weight (GA: 461 ± 7, GC: 418 ± 5 kg, p≤0,0001) and greater weight of the calf without showing differences p≥0.05 (GA: 34.1 ± 0.8, GC: 32.3 ± 0.5 kg). It is concluded that adult cows have a better productive and reproductive behavior, and it would also be important to maintain a greater percentage of them in the herd for the systems studied.

Keywords: adult weight; body condition; calving interval; weight the calf at birth.
Variaciones en el contenido de proteína, lípidos y ácidos grasos de la semilla de chía (Salvia hispanica L.) producida comercialmente en Ecuador
Authors: Ayerza (h) Ricardo
Published: December 2021

Variations in the protein, lipid and fatty acid content of the commercial chia seed (Salvia hispánica L.) produced in Ecuador

Resumen

El objetivo fue determinar las variaciones en los contenidos de proteína, lípidos y composición de ácidos grasos de las semillas de chía producidas comercialmente en seis sitios de los ecosistemas de los Valles Interandinos (Altos y Bajos), Selva Lluviosa Pluviestacional y Bosque Seco Tropical, del Ecuador. El contenido de proteína fue más alto (p<0,05) en las semillas de Bosque de Oro (24,78%) y El Azúcar (24,35%) que las de los otros cuatro sitios, y sin diferencias significativas (P<0,05) entre ellos. Las semillas de Bosque de Oro (34,90%) y San Pablo presentaron el más alto contenido de lípidos, aunque sin diferencias significativas (p<0,05) con las de Salinas (32,65%) y Patate (31.97%). Las semillas originadas en Salinas presentaron el mayor (p<0,05) contenido de α-linolénico (66,75%), seguido por las de Patate (63,93%), Guayllabamba (63,57%), Bosque de Oro (63,53%) y San Pablo (62,70%). El ácido graso α-linolénico presentó una alta relación negativa con los ácidos grasos palmítico (R2 = 0,797; p<0,001), linoleico (R2 = 0,862; p<0,001), y oleico (R2 = 0,767; p<0,001).

Palabras clave: aceite; ácidos grasos; chía; Ecuador; Salvia hispánica L.

Abstract

The objective was to determine the variations in the protein content, lipids and fatty acids composition of the chia seeds commercially produced in six locations of the Inter-Andean Valley (Low and high), Rainforest and Tropical Dry Forest ecosystems of Ecuador. The protein content was higher (p< 0.05) in the seeds from Bosque de Oro (24.78%) and El Azúcar (24.35%) than those originated in the other four locations and without significant differences (p < 0.05) between them. The seeds of Bosque de Oro (34.90%) and San Pablo had the highest lipid content, although without significant differences (p<0.05) with those of Salinas (32.65%) and Patate (31.97%). The seeds originated in Salinas had the highest (p<0.05) content of α-linolenic (66.75%), followed by those of Patate (63.93%), Guayllabamba (63.57%), Bosque de Oro (63.53%) and San Pablo (62.70%). The α-linolenic fatty acid showed a high negative relationship with palmitic fatty acids (R2 = 0.797; p<0,001), linoleic (R2 = 0.862; p<0.001), and oleic (R2 = 0.767; p<0.001).

Keywords: chia; Ecuador; fatty acids; oil; Salvia hispanica L.
Dos protocolos de superovulación en donantes de embriones en vacas mestizas en el trópico
Authors: Zambrano Freddy , Hurtado Ernesto Antonio , Arteaga Fátima , Mendieta Derlys
Published: December 2021

Two superovulation protocols in embryo donors in crossbred cows in the tropics

El objetivo de esta investigación fue evaluar la efectividad de dos protocolos de superovulación en vacas mestizas de la hacienda La Balda del cantón El Carmen. Se seleccionaron 10 vacas genéticamente superiores, en condiciones nutricionales y sanitarias óptimas, que fueron aleatorizadas en dos grupos de estudio (n=5). El primer grupo recibió 200mg de FSH en 8 dosis (Folltropin-V); mientras que el segundo grupo fue tratado con 140mg de FSH en 4 dosis + 400 U.I de eCG dosis única (Folltropin-V + Folligon). Las variables a medir fueron: número de cuerpos lúteos; número de embriones aptos para ser lavables; número de embriones aptos para ser transferidos y grados de calidad embrionaria. La comparación de los grupos se analizó estadísticamente a través de la prueba T-Student para muestras pareadas o relacionadas.   No se encontró diferencia estadísticamente significativa entre ninguna de las variables en estudio (P˃0,05). Sin embargo, el análisis costo/ beneficio mostró que los animales del primer grupo resultaron con un tratamiento más rentable, siendo superior en 33% con respecto al segundo grupo. Los protocolos hormonales utilizados son alternativas de manejo reproductivo, con repercusión económica.

Palabras clave: Reproducción; cuerpos lúteos; hormonas; bovinos; rentabilidad. 

Abstract

The objective of this research was to evaluate the effectiveness of two protocols of superovulation in mestizo cows from the La Balda ranch of El Carmen canton. Ten genetically superior cows were selected, under optimal nutritional and health conditions, which were randomized into two study groups (n = 5). The first group received 200mg of FSH in 8 doses (Folltropin-V); while the second group was treated with 140mg of FSH in 4 doses + 400 U.I of eCG single dose (Folltropin-V + Folligon). The variables to be measured were: number of corpora lutea; number of embryos capable of being washable; number of embryos able to be transferred and embryo quality grades. The comparison of the groups was analyzed statistically through the T-Student test for paired or related samples. No statistically significant difference was found between any of the variables under study (P˃0.05). However, the cost / benefit analysis showed that the animals of the first group resulted with a more profitable treatment, being 33% higher than the second group. The hormonal protocols used are alternatives for reproductive management, with economic repercussion.

Keywords: Reproduction; corpora lutea; hormones; bovines; profitability.
Sincronización de la fertilidad de vacas mestizas con el uso de progesterona intravaginal
Authors: Baque Gorostiza Quirina Baldramina , Motato Alarcón Nelson Enrique
Published: December 2021

En el cantón Mocache, provincia Los Ríos y durante el 2010 se condujo esta investigación en que las vacas mestizas se les implantaron dispositivos intravaginales (CDR) que se retiraron a los siete, ocho y nueve días de insertados (10 animales en cada caso). Los resultados se analizaron con la prueba de observaciones pareadas “t” de Student y adicionalmente se determinó el tiempo que entraron en celo las vacas y sus porcentajes de celo y preñez. No existieron diferencias significativas cuando se comparó las horas de entrada en celo, a los siete, ocho y nueve días de retiro de los dispositivos intravaginales. No afectando al porcentaje de preñéz. Por lo cual la exclusión del dispositivo a los ocho días luego de su colocación fue el más eficaz en la sincronización del celo, logrando un 60 % de efectividad de preñez. Ante lo que el método de sincronización es una alternativa factible de aplicar al permitir una mayor optimización de los recursos disponibles. 

Palabras claves: Sincronización de la fertilidad, fertilidad de vacas, vacas mestizas, Progesterona intravaginal, inseminación artificial
Metodología de evaluación del impacto social de un proyecto: caso viviendas emergentes para Manabí
Authors: Vanga Arvelo María Giuseppina , Santamaría Herrera Nathalie Madeleine , Ruiz Ortiz Fredy Marcelo , Palomeque Núñez Myrian Cecilia
Published: December 2021

Este artículo propone una metodología para evaluar el impacto social de un proyecto que es producto de una investigación denominada: “Vivienda emergente y sustentable: una solución para la comunidad de Río Muchacho” realizada en la Universidad Nacional de Chimborazo por la carrera de Arquitectura con el apoyo de Ingeniería Civil. Su propósito fue donar viviendas emergentes a la comunidad antes mencionada para ayudar a remediar los problemas de hábitat de los damnificados por el terremoto ocurrido en Ecuador en abril de 2016. Después del evento ocurrido esta congregación no recibió atención prioritaria porque era pequeña. Como parte de la metodología, se elaboraron dos instrumentos destinados a emitir criterios sobre los resultados y el impacto de la construcción de las viviendas tanto en los beneficiarios como en todos los entes involucrados. Los resultados de su aplicación demuestran su confiabilidad para lograr los objetivos establecidos, obteniendo información vital sobre los efectos que el proyecto tuvo en los involucrados. Se concluye que el hecho de que un procedimiento formal para evaluar el impacto social de un proyecto sea elaborado previa y científicamente contribuye significativamente a una evaluación objetiva de sus beneficios.
La sistematización de experiencias ambientales pedagógicas en el turismo
Authors: Martínez de la Vega Vivian
Published: December 2021

Al estructurar una herramienta para la gestión de la formación en Educación Ambiental para el Desarrollo Sostenible en el turismo, el uso de la sistematización de experiencias con la contribución de sus lecciones de aprendizaje constituye una credencial valiosa para la generación de un producto pedagógico de calidad superior, con incuestionable impacto en el desempeño de los trabajadores del sector. El enfoque de la ciencia en este universo de investigación es el objetivo principal de este artículo, que presenta los resultados de la sistematización de un ciclo de conferencias de corta duración, de los talleres de Buenas Prácticas Ambientales y los talleres de Manejo Ambiental Integrado, con el cambio climático como tema transversal.
Análisis de dos décadas del catálogo editorial de la Facultad de Filosofía y Letras UBA (1990 y 2010)
Authors: Giunti Graciela M. , Contardi Silvia , Ramírez Ibarra Ivalú
Published: December 2021

Desde su fundación en 1896 la Facultad de Filosofía y Letras de la Universidad de Buenos Aires (FFyL-UBA) asumió la tarea y el compromiso de publicar libros y fue construyendo un catálogo de cerca de 1500 títulos en toda su trayectoria. El artículo presenta un análisis de la producción editorial desde tres perspectivas: la creación intelectual, la materialidad y la difusión-circulación, cada una de las cuales agrupa diferentes variables de estudio. Se usaron métodos cuantitativos e interpretativos que permitieron, con datos concretos, aproximar una respuesta a los supuestos surgidos de una mirada general de la problemática. Se analizaron dos décadas, una del siglo pasado (1990) y otra del siglo XXI (2010).

Se concluye que, sin bien los cambios de la producción editorial de la FFyL-UBA entre las dos décadas tienen variaciones tanto significativas como menores en las tres perspectivas analizadas, permiten identificar algunas tendencias y conductas consolidadas en la organización de sus publicaciones. Se identificó un incremento de la producción de una década a otra. Se observó una disminución en la monoautoría, forma predominante de escritura en la década de 1990 y se incrementó el número de autores en colaboración en la década de 2010. Se visualizan todas las disciplinas al momento de conformar el catálogo editor de la Facultad aunque algunas con más fortaleza que otras. En las dos décadas se vislumbra el uso de títulos más convocantes y atractivos, así como también el de subtítulos para orientar sobre el tema. Las series y colecciones tanto generales como especializadas en ambas décadas mostraron ser una práctica editorial consolidada al publicarse el 80% de la producción dentro del diseño de una de ellas. El soporte preferido continúa siendo el impreso y en la última década se aprecia una clara tendencia a normalizar el sello editorial en el pie de imprenta y una presentación gráfica más atractiva. Se verificó una considerable difusión y circulación de las obras y se observaron distintas estrategias para divulgar y hacer más conocido lo publicado.
Types and Forms of Folk Songs Tradition in Malayalam Literature
Authors: S Kamaraj
Published: December 2021

The folk songs have been well flourished in Malayalam Literature. The Malayalam folk songs entirely different from the Tamil folk songs. But it is fact that the structure of Malayalam Pattu has been adopted from the Tamil Literature and we could understand that the Tamil structure has been following even today. Folk songs have a special place in Malayalam Literature. Folk songs in Malayalam are categorized into community songs, Worship songs, Professional songs and celebration songs etc. This study has been analysis the Types and forms of folk songs which related to worshiped.
Suriye Kürtleri ve Ulus-Devlet Vatandaşlığı: Dâhil Etme ve Dışlama Mekanizmaları
Authors: YILDIRIM Ayşe
Published: December 2021

Günümüz dünyasının başat örgütlenme biçimi olan ulus-devletlerin önemli bir bölümü, her ne kadar homojen bir kimlik ve kültür iddiasında bulunsalar da, çok-etnili bir yapıya sahiptirler. Çok-etnili yapı kuşkusuz her bir ulus-devletin, hangi kimliklerin dahil edilip hangilerinin dışarıda bırakılacağını belirleyen vatandaşlık çerçevesini belirlemesini gerekli kılmıştır. Bu çalışma söz konusu ulus-devletlerden biri olan ve 20. yy.’ın başlarında Fransa’nın himayesinde inşa edilen Suriye devletinin Kürt nüfusuna ilişkin vatandaşlık politikalarını konu edinmektedir. Bu konu izleğinde araştırmanın amacı, Osmanlı ve öncesi dönemlerde yerel olarak tanımlanan Kürt kimliğinin, Suriye ulus-devletinin kurulmasıyla birlikte nasıl “kimliksiz”leştirildiğine dair bir resim çizebilmek ve Suriye Kürtleri örneğinde ulus-devlet vatandaşlığının çelişkilerini ortaya koyabilmektir. Araştırmanın verileri konuyla ilgili literatürün yanı sıra saha çalışmasına dayanmaktadır. Saha çalışması 2010-2011 yılları arasında gerçekleştirilmiş, veriler derinlemesine görüşmeler, katılımlı gözlem, yaşam hikayeleri gibi etnografik tekniklere başvurularak elde edilmiştir. Çalışmada Kürtlerin dört (Türkiye, Irak, İran ve Suriye) ulus devlet sınırları içerisinde kalmasına karşın, kimlik mücadelesinin süreğenlik arz etmesi ve her bir devletteki olayların Suriye Kürtlerini de etkilemesinin, Suriye devletinin Kürtlere yönelik vatandaşlık politikalarını etkilediği ileri sürülmektedir. Sonuç olarak Suriye devletinin Kürt nüfusa ilişkin Arap Kemeri, Kürtçe’nin kullanılmasının yasaklanması gibi asimilasyonist politikalarına karşın vatandaşlık söz konusu olduğunda dışlayıcı bir tavrı olduğu görülmüştür. Ancak bu dışlayıcı tavrın da ikircimli olduğunu belirtmek gerekir.
Nuevas especies del género Diastoleus Solier, 1838 (Tenebrionidae: Scotobiini) de Chile
Authors: Guerrero Marcelo , Diéguez Víctor Manuel
Published: December 2021

Se describen cuatro nuevas especies de Scotobiini de Chile, Diastoleus arriagadai Diéguez y Guerrero, sp. nov., Diastoleus diaguita Diéguez y Guerrero, sp. nov., Diastoleus mollensis Guerrero y Diéguez, sp. nov. y Diastoleus vidali Guerrero y Diéguez, sp. nov., pertenecientes a la subfamilia Tenebrioninae. Se proveen caracteres diagnósticos y fotografías de los adultos. Adicionalmente se incluye una clave de identificación y un mapa de distribución para la totalidad de las especies de Diastoleus hasta ahora conocidas.
Nuevos registros de la poco conocida Dardarina gaucha Mielke, 1980 (Lepidoptera: Hesperiidae) en la Reserva de la Biósfera Pereyra Iraola, Buenos Aires, Argentina
Authors: Delaloye Michelle , Arregui Martin , Braun Holger
Published: December 2021

Nuevos registros de la poco conocida Dardarina gaucha Mielke, 1980 (Lepidoptera: Hesperiidae) en la Reserva de la Biósfera Pereyra Iraola, Buenos Aires, Argentina
Solidão e cultura digital:
Authors: Rorato Londero Rodolfo , Mardones Loncomilla Gina Viviane
Published: December 2021

Este artículo trata de la correlación entre la formación del sentimiento de soledad y el proceso histórico de los mediosde comunicación y cómo resultó en la construcción del sujeto moderno. Para entender estas transformaciones,la revisión de la literatura se basa en el proceso sociohistórico de formación de la sociedad occidental, tomandola Revolución Francesa como un hito. Al mismo tiempo, identifica cómo las tensiones psíquicas, especialmentela experiencia de la soledad, se vinculan gradualmente a los medios de comunicación. El enfoque principal son lasconcepciones teórico-metodológicas desarrolladas en los estudios culturales de Raymond Williams sobre la estructura del sentimiento, la cultura y los medios de comunicación. El objetivo es entender cómo el sentimiento de soledad está asociado con la llamada cultura digital de hoy en día.
Investigation of the Distribution and Expression Level of Pro and Anti-Apoptotic Bax and Bcl-2 in Ovarian Follicles at Different Developmental Stages
Authors: ŞEKER Uğur , EŞKİ Funda , KURT Serdal
Published: December 2021

Background: In this study we aimed to investigate the distribution and expression level of pro and anti-apoptotic proteins, Bax and Bcl-2, in different developmental stages of ovarian follicles and any relations between these proteins and follicle atresia.
Materials and Methods: For that purpose, bilateral 16 ovaries of adult 8 mice were received and the tissues were fixed in 10% neutral buffered formalin. Routine tissue processing protocol was performed and the samples were embedded into paraffin blocks. Five µm thick sections were received and the tissue sections were stained with Bax and Bcl-2 immunohistochemistry. The ovarian follicles were classified as primordial, primary, secondary and antral. Distribution and expression levels of Bax and Bcl-2 were evaluated among and within the developmental stages. The expression levels of Bax and Bcl-2 were also compared with atretic follicle ratio.
Results: Immunopositivity of Bax and Bcl-2 were observed in ovarian stromal cells, granulosa, oocytes, and lutheal cells in a varying range. Despite of some immunpositivity, most of the primordial and primary follicle granulosa cells and oocytes were negative for these apoptosis regulator proteins. The intensity of immunopositivity increased at the farther developmental process in follicles. In addition, the immunoexpression level significantly increased just with the beginning of the secondary follicular stage and the expression levels were the most intense in antral follicles. Furthermore, some of the antral follicles were intense Bax positive which were observed with atretic follicle morphology.
Conclusions: Bax and Bcl-2 are crucial regulators of ovarian follicle development. Although Bcl-2 contributes on development, correlation analyses indicated that Bax decides stronger than Bcl-2 on the atresia or development fate of follicle.
Bringing Political Upheaval and Cultural Trauma into Order: A Document-Theoretical Approach to the Social Significance of Bibliographic Classification Systems
Authors: Hansson Joacim
Published: December 2021

This paper explores the ability to define bibliographic classification systems as socially significant documents in a way that goes beyond their immediate function in the information retrieval process. It does so in dialog with theory on documents and documentality, and knowledge organization theory. Two examples show how development of new classification systems address social and cultural structures in periods of rapid social and cultural change and crisis. The first example discusses the design of a classification system for Swedish public libraries in the late 1910s, and the second addresses the re-formulation of the Holocaust experience in American Jewish library classification practice in the 1950s and 1960s. Results indicate that social significance to classification systems influence the definition their institutional context in relation to wider social issues and movements. The character of this influence suggests research on documentality needs to address the relation between form and content in documents defined as reifications of social acts.
Documentation Influence in Brazilian Library and Information Science: the Case of University of São Paulo
Authors: Cortes Mendes Luciana
Published: December 2021

Johanna W. Smit studied under Jean Meyriat and Jean-Claude Gardin in France, and upon becoming a professor at the Library Science and Documentation Department of the School of Communication and Arts of the University of São Paulo (USP), Brazil, introduced to it the then current developments in French Documentation, mainly those related to documentary analysis. In 1986, Professor Smit and a group of professors of USP founded TEMMA Group, a research group devoted to issues concerning document organisation and representation, which lasted for 30 years and incorporated professors of São Paulo State University. In this paper, I present to a wider public the research related to document organisation and representation that was brought about by the professors of USP from 1981, when Johanna W. Smit became a professor. I focus on the research conducted by the members of TEMMA Group, presenting key concepts developed by them, how the studies of the group still influence USP, and the reason why their developments are relevant to current document studies.
Cirrosis de Laennec
Authors:   , Campagna Oscar Antonio
Published: December 2021

Los médicos antiguos ya conocían el endurecimiento del hígado como final de una hepatopatía crónica, describiéndolo como un hígado duro, crugiante al corte, escirroso y con obstrucción hepática. Entre otros, Besal (1515-1564) y Morgagni (1652-1771) ya describieron retracciones hepáticas observadas en sus autopsias. Las preminencias dé la superficie externa del hígado se denominaron tubérculos, y considerando que entonces entre tales relieves incluso se comprendía los nodulos cancerosos, es dificil dilucidar si, además del cáncer se reconoció a la cirrosis como una entidad morbosa. Al principio la cirrosis solo despertó interes anatómico. Laennec fué el primero que intentó relacionar el cuadro anatomo-patológico con el cuadro clínico, adoptando la denominación de cirrosis para destacar el color amarillo limón que a menudo muestran las granulaciones como signo típico. Laennec dice refiriéndose a esta afección "El hígado está reducido a una tercera parte de su tamaño con su superficie externa ligeramente verrugosa y arrugada de color amarillo pardusco".
La tuberculosis en la industria frigorífica
Authors:   , Bustos Juan Carlos
Published: December 2021

Dado el enorme conglomerado fabril existente en la localidad de Berisso, partido de La Plata, Provincia de Buenos Aires, especialmente de la industria frigorífica, vislumbramos la posibilidad de que la tuberculosis, entre otras enfermedades, tenga una importancia más o menos grande. Ello ha tenido amplia confirmación con los datos que hemos podido extractar del Dispensario "Juan F. Tettamanti" de esa localidad, servicio que depende del Consejo de Lucha Antituberculosa de la Provincia de Buenos Aires. Fundado el año 1930, es uno de los primeros con que cuenta la Provincia. La lucha antituberculosa, encauzada recién después de 1936 y consolidada después de 1945, era una entidad dispersa y producto de esfuerzos aislados, por ello, su acción era pequeña en relación al problema que representaba la tuberculosis. Hoy, dotada de mejores y más modernos elementos se encuentra en condiciones de cumplir con los requisitos fundamentales que exige una acción coordinada y efectiva. Del estudio realizado en él y tomando un grupo de examinados que desarrollan distintas actividades y que por razones diversas han concurrído, (hacemos notar que la menor proporción lo ha hecho como medida de seguridad), hemos separado aquellas personas cuya actividad correspondía a obreros o empleados de los frigoríficos, de las que desarrollan otras tareas. El total que hemos considerado y que asciende a 1825 personas corresponde a examinados entre el 1º de ageste de 1946 y el 30 de abril de 1949. La razón de haber tonado este lapso obedece a que las fichas, de los mismos contenían los datos completos y por otra parte muchos se encontraban en asistencia o Internados pero vigilados por el Dispensario. Sobre este total hemos encontrado 102 casos de tuberculosis lo que dá un tenor de 5,64 %. El total de personas cuya actividad se encuentra relacionada con los frigoríficos asciende a 750 y entre ellos hemos encontrado el 7,72 % de tuberculosos cifra que contrasta con el 4,2 % encontrado entre los 1075 concurrentes de otras actividades.