bluuebunny/crossref_metadata_2025 huggingface dataset:
Expression of estrogen receptors alpha (ERs α) and folliculogenesis profile in ovary of the rats ovarian hypofunction model
Authors: Firmawati Aulia , Hutabarat Mitra Artha Kurnia , Pratiwi Herlina , Haryo Alibiruni
Published: April 2021

Ovarian hypofunction is one of the reproductive disorders that occur due to a decrease in ovarian function that causes animals to not experience heat. The purpose of this study was to determine the effect of GnRH antagonist hormone interventions on ovarian hypofunction model rats by looking at the expression of alpha ERs (ERs α) and the profile of folliculogenesis in the ovaries. This study used two groups of female Wistar strain rats, aged 8-10 weeks, bodyweight 150-180 grams and each group contained 10 animals. Intervention gave control group, without cetrorelix acetate intervention (placebo aqua dest sterile), treatment group with the induction of cetrorelix acetate 0.0135 mg/kg BW for 17 days. Observation of α ERs expression in the ovary was analyzed by immunohistochemical methods, and data were analyzed using T-Test analysis (α <0.05). Meanwhile, the folliculogenesis profile was analyzed by hematoxylin-eosin (HE) staining, then analyzed descriptively. The results of this study indicate that the treatment group given the intervention cetrorelix acetate dose 0.0135 mg/kg BW showed significantly different results compared to the control group. In the treatment group, the ERs α expression decreased by 82.7% compared to the control group and in the folliculogenesis profile, there was a decrease in follicular development from pre-antral follicles to antral follicles. Cetrorelix acetate interventions can have an effect on the inhibition of folliculogenesis and estrogen binding with ERs that cause anoestrous.
The phenotype characteristics and decline population of Sawang duck in Sawang Village, Karimun Regency, Riau Islands Province
Authors: Hidayati Hidayati , Desrita Desrita
Published: April 2021

Sawang duck is one of Indonesia's local dual-purpose type ducks due to the offspring of Tsaiya ducks originating from Taiwan. Tsaiya ducks enter the Sawangarea, brought by residents from Singapore around 1955 and subsequently bred in the Sawang Village, adapting to the environment and the local farming. This research was conducted in August-December 2018. Primary data on the qualitative, morphometric, and potential feed were taken in Sawang Village, Karimun Regency, Riau Islands Province. Currently, Sawang duck is only found in Sawang Village, maintained by two farmers. Secondary data of potential areas and poultry populations were obtained from the Department of Food and Agriculture of Karimun Regency, and proximate analysis was carried out at the Ruminant Nutrition Laboratory, Faculty of Animal Husbandry, Andalas University. The research method was conducted by survey with census sampling techniques. The Sawang duck has a diversity of colors for feather, skin, beak, and shank. The morphometric decrease was indicated by bodyweight of 1,450 ± 119.52 grams, femur length of 7.41 ± 1.62 cm, tibia length of 9.94 ± 0.51 cm, length of shank 4.38 ± 0.25 cm, third finger length 6.36 ± 0.90 cm, maxilla length 5.21 ± 0.16 cm, backbone length 20.13 ± 1.13 cm, wing bone length 26.65 ± 1.70 cm, bone length chest 10.63 ± 0.80 cm, and shank circumference 1.24 ± 0.10 cm. Efforts to preserve ducks Sawangneed to be considered so that their existence is not destroyed by exploiting the existing area's potential.
INTEGRATION OF THE NUMERICAL SOLUTION MODULE OF THE KINETIC EQUATION INTO THE CFD PACKAGE FOR THE VOLUME CONDENSATION PROBLEM OF THE VAPOR-GAS MIXTURE FLOW THROUGH A NOZZLE
Authors: Sidorov A. A. , Yastrebov A. K.
Published: April 2021

Objective. Integrating the numerical solution module of the kinetic equation for the droplet size distribution function in a CFD package. Application of the module to volumetric condensation at the supersonic flow of a vapor-gas  mixture through a nozzle in a two-dimensional formulation, comparison of  the results with experimental data of third-party authors.

Methods. In this  paper, the problem of volume condensation in the supersonic flow of a vapor-gas mixture through a nozzle is solved by finite element methods in a two-dimensional formulation using user-defined functions.

Results. A module for the numerical solution of the kinetic equation for the droplet size distribution function is presented as a user-defined function integrated into the calculated CFD package.

Conclusion. The module application to volumetric condensation for a vapor-gas mixture flow through the nozzle gave a qualitative agreement in all areas and a quantitative agreement in the area of intense condensation with  measurement data. The distributions of temperatures, pressures, and  the degree of supersaturation are presented both along the central axis and  on the plane bounded by the contour of the computational domain. It is shown that the module does not depend on the solver type (stationary or non-stationary).
Calidad de la canal y la carne en pollos de ceba que consumen Roystonea regia
Authors: Martínez-Pérez Madeleidy , Vives-Hernández Yesenia , Rodríguez-Sánchez Bárbara , Pérez-Acosta Osney G.
Published: April 2021

Objetivo. Estudiar la calidad de la canal y la carne en pollos de ceba que consumen harina de frutos de Roystonea regia (palmiche). Materiales y métodos. Se utilizaron 40 pollos de ceba distribuidos según diseño completamente aleatorizado en cuatro tratamientos: control (maíz-pasta de soya) y la inclusión de 5, 10 y 15% de harina de palmiche. Se estudió el rendimiento de la canal, grasa abdominal y la calidad de la carne (tecnológicos y composición de ácidos grasos (AG)). Para los parámetros de apariencia se realizó análisis de varianza no paramétrico de clasificación simple. Resultados. No se encontraron diferencias entre tratamientos para el peso de la canal y pH a los 45 minutos y 24 horas postmortem. Hubo una reducción de la grasa abdominal en el 5 y 15% con respecto al control (13.00 y 11.96 vs 17.02 g/kg), en tanto que el 10% no difirió del resto (15.10 g/kg) (P<0,01). No se observaron diferencias en el color, excepto para la luminosidad en el muslo que fue superior con la inclusión de 10 y 15% (48.62 y 49.22) respecto al 5% (45.32) y el control no difirió entre tratamientos (47.53) (P<0,05). La composición de AG en las diferentes porciones comestibles mostró que las aves depositaron los ácidos oleico, linoleico y palmítico en mayor proporción. Conclusiones. La inclusión de  harina de palmiche a las dietas de pollos de ceba no modifica el rendimiento de la canal, reduce la grasa abdominal e incide positivamente en los indicadores de calidad de la carne.
Non-surgical Furcal Perforation Management with Biodentine in Retreatment: A 1-Year Recall Review
Authors:   Post graduate students, Department of Conservative Dentistry and Endodontics, CSI College of Dental Sciences, Madurai, Tamil Nadu, India, Valliappan CT , Asir J Joyson Joe ,   Post graduate students, Department of Conservative Dentistry and Endodontics, CSI College of Dental Sciences, Madurai, Tamil Nadu, India, Subashri V ,   Post graduate students, Department of Conservative Dentistry and Endodontics, CSI College of Dental Sciences, Madurai, Tamil Nadu, India, Vaishnavi V ,   Private practitioner, Chennai, Tamil Nadu, India, Sherwood I Anand ,   Professor and Head, Department of Conservative Dentistry and Endodontics, CSI College of Dental Sciences, Madurai, Tamil Nadu, India
Published: April 2021

Furcal perforation management in root canal retreatment is often challenging as the outcome of the perforation sealing depends on several parameters. The recent introduction of several bioactive cements and magnification systems has made the sealing of perforations easier and the outcome more predictable. This study highlights the clinical outcomes of furcal perforation management in root canal retreatment using biodentine.
Telemanagement of Home-Isolated COVID-19 Patients Using Oxygen Therapy With Noninvasive Positive Pressure Ventilation and Physical Therapy Techniques: Randomized Clinical Trial (Preprint)
Authors: Adly Aya Sedky , Adly Mahmoud Sedky , Adly Afnan Sedky
Published: April 2021

BACKGROUND

With the growing stress on hospitals caused by the COVID-19 pandemic, the need for home-based solutions has become a necessity to support these overwhelmed hospitals.

OBJECTIVE

The goal of this study was to compare two nonpharmacological respiratory treatment methods for home-isolated COVID-19 patients using a newly developed telemanagement health care system.

METHODS

In this single-blinded randomized clinical trial, 60 patients with stage 1 pneumonia caused by SARS-CoV-2 infection were treated. Group A (n=30) received oxygen therapy with bilevel positive airway pressure (BiPAP) ventilation, and Group B (n=30) received osteopathic manipulative respiratory and physical therapy techniques. Arterial blood gases of PaO2 and PaCO2, pH, vital signs (ie, temperature, respiratory rate, oxygen saturation, heart rate, and blood pressure), and chest computed tomography scans were used for follow-up and for assessment of the course and duration of recovery.

RESULTS

Analysis of the results showed a significant difference between the two groups (P<.05), with Group A showing shorter recovery periods than Group B (mean 14.9, SD 1.7 days, and mean 23.9, SD 2.3 days, respectively). Significant differences were also observed between baseline and final readings in all of the outcome measures in both groups (P<.05). Regarding posttreatment satisfaction with our proposed telemanagement health care system, positive responses were given by most of the patients in both groups.

CONCLUSIONS

It was found that home-based oxygen therapy with BiPAP can be a more effective prophylactic treatment approach than osteopathic manipulative respiratory and physical therapy techniques, as it can impede exacerbation of early-stage COVID-19 pneumonia. Telemanagement health care systems are promising methods to help in the pandemic-related shortage of hospital beds, as they showed reasonable effectiveness and reliability in the monitoring and management of patients with early-stage COVID-19 pneumonia.

CLINICALTRIAL

ClinicalTrials.gov NCT04368923; https://clinicaltrials.gov/ct2/show/NCT04368923
First-line Advanced Cutaneous Melanoma Treatments: Where Do We Stand? (Preprint)
Authors: Abdulkarim Louay S , Motley Richard J
Published: April 2021

UNSTRUCTURED

Cutaneous melanoma has always been a dreaded diagnosis because of its high mortality rate and its proclivity for invasiveness and metastasis. Historically, advanced melanoma treatment has been limited to chemotherapy and nonspecific immunotherapy agents that display poor curative potential and high toxicity. However, during the last decade, the evolving understanding of the mutational burden of melanoma and immune system evasion mechanisms has led to the development of targeted therapy and specific immunotherapy agents that have transformed the landscape of advanced melanoma treatment. Despite the considerable strides in understanding the clinical implications of these agents, there is a scarcity of randomized clinical trials that directly compare the efficacy of the aforementioned agents; hence, there are no clear preferences among the available first-line options. In addition, the introduction of these agents was associated with a variety of dermatologic adverse events, some of which have shown a detrimental effect on the continuity of treatment. This holds especially true in light of the current fragmentation of care provided by the managing health care professionals. In this study, we attempt to summarize the current understanding of first-line treatments. In addition, the paper describes the indirect comparative evidence that aids in bridging the gap in the literature. Furthermore, this paper sheds light on the impact of the scarcity of dermatology specialist input in the management of dermatologic adverse events associated with advanced melanoma treatment. It also looks into the potential avenues where dermatologic input can bridge the gap in the care provided by oncologists, thus standardizing the care provided to patients with melanoma presenting with dermatologic adverse events.
Role of Dermatologists in Advanced Cutaneous Melanoma Treatment: A Call for Action (Preprint)
Authors: Abdulkarim Louay Samir
Published: April 2021

UNSTRUCTURED

Advanced cutaneous melanoma has always been a dreaded diagnosis, but with the introduction of a number of practice-changing agents, namely targeted therapy and immunotherapy, considerable strides have been achieved in terms of survival rates. However, the introduction of these agents was associated with a variety of dermatological adverse event, some of which have shown a detrimental effect on the continuity of treatment. This holds especially true in the light of the current fragmentation of care provided by the managing health care professionals. This article sheds light on the impact of the scarcity of dermatology specialist input in the management of dermatological adverse events associated with advanced melanoma treatment. Furthermore, it looks into the potential avenues where dermatological input can bridge the gap in the care provided by oncologists, hence standardising the care provided to melanoma patients with dermatological adverse events.
Can Salt Valproate Prevent Switch Associated With Antidepressants in Depressive Patients?Meta-analysis From Chinese Data (Preprint)
Authors: Dong Shen , Lv Wangqiang , Sun Fengli , Jin Weidong
Published: April 2021

BACKGROUND

There are many ways to strengthen the effects of treatment for depressive patients,in which, add on mood stabilizer is one of these many ways. And at same time,it was very common that antidepressant induce switch to mania.Does the mood stabilizer can prevent the switch?This study is that assessment the difference between combination treatment of valproate and antidepressant and monotherapy antidepressant.

OBJECTIVE

to assess the preventing switch effect of valproate in depressive patients treated by antidepressant

METHODS

We searched Chinese Biomedical Database(CBM), China National Knowledge Infrastructure(CNKI) , WANFANG database,and Chinese Social Sciences Citation Index(CSSCI) in Chinese to find literature from 1 January 2005 to 1 January 2020 related to the study in model of “comparison of switch rate between combination treatment of valproate and antidepressant and monotherapy of antidepressant in depressive patients” ,among which results such as comments, letters, reviews and case reports were excluded. The rate of switch between groups was synthesized and discussed.

RESULTS

A total of 549 subjects were included in 7 studies,in which in 279 cases are in combination group and 270 cases are in group of monotherapy by antidepressant . Random effect model is used to account for the data by Revman 5.2. The results showed that the switch rate of valproate group was 0.11%(3/279),switch rate of antidepressant group was 11.11%( 30/270), which was very different in switch rate(OR=0.13 ,95% CI: 0.05–0.35) and also indicated that valproate reduced switch rate was 99%[ (11.11%-0.11%)/11.11%]. In sodium valproate group, switch rate was 0%，while switch rate in antidepressant was 5.7%( OR=0.18,95%CI=0.04-0.84),which was significantly different(Z=2.18,P=0.03). In magnesium valproate group, switch rate was 2.2%,while switch rate in antidepressant was16.92%( OR=0.11,95%CI=0.03-0.39),which was significantly different(Z=3.47,P=0.0005).

CONCLUSIONS

The salt valproate can reduced switch rate related to antidepressant in depressive patients. In this study, salt valproate reduce 99% switch rate.

CLINICALTRIAL

NO
Indonesia's South-South and Triangular Cooperation (SSTC) as the Future of Diplomacy for World Solidarity to Overcome the COVID-19 Pandemic
Authors: Iswardhana Muhammad Ridha
Published: April 2021

The COVID-19 pandemic that started in China has expanded throughout the world. As a result, all countries have to face various challenges due to the Corona Virus. It does not only threaten the health, but also the economy, social, culture and politics of almost all countries. The worst conditions are faced by many developing countries that are unable to overcome the various adverse effects caused by the virus.However, currently, there is no world leadership yet capable to overcome the Corona Virus problem for all countries. Treatment tends to be domestic and unilateral. To solve the pandemic, there is a south-south cooperation framework known as SSTC. Collaboration and partnerships between southern countries are important because more developing countries are facing the impact of the virus. Indonesia as one of the successful actors operating SSTC since 2010 can use this framework of cooperation as solidarity with other southern countries.In this article, a descriptive qualitative approach is used to explain and analyze the conditions that occur concerning the theories. The author uses the theory of Soft Power and International Assistance, aims to explain how Indonesia's diplomacy policy through the SSTC is the finding that Indonesia conducted a series of assistance and training to various countries during the Pandemic. This paper contributes to showing Indonesia's consistent policy and position to overcoming COVID-19 towards several developing countries. However, Indonesia needs consistenantyto increase its role in handling the Corona Virus in various developing countries.
Challenging Underrepresentation of Women Leadership in Global South during COVID-19
Authors: Hanifah Laila
Published: April 2021

The WHO's analysis of gender equity in the health workforce of 104 countries has recorded that 70% of the global health workforce is women, while only 25% of them have the opportunity to be decision-makers in COVID-19 leadership. This large percentage has targeted women to be the majority group to get an infection exacerbated by fatigue and mental stress both in the workplace and family. The situation is worsened in Global South due to the low score of the global health system and a high gender gap that leads to inequality. Some important arguments reinforced why women's leadership during the crisis is matters and should be considered. This research will compare several case studies between Global North and Global South countries led by women and men as decision-makers in the COVID-19 pandemic case and in the end, these case studies would challenge women leadership in Global South. The success of the leadership parameter will be assessed from the total number of COVID-19 cases and total deaths from January 17th until October 21st, 2020. The findings found that the underrepresentation of women as decision-makers and policies in COVID-19 leadership led to the length of pandemic management and an increase in the number of COVID-19 cases in the Global South. In further explanation, the research identified several significant factors that explain why women leadership could be more successful to overcome the COVID-19 pandemic in Global South.
Конференция IX Конгресса Технологической платформы РФ «ФОТОНИКА»: «Лазерные производственные технологии»
Authors: Трасковецкая Д.
Published: April 2021

Представлен краткий обзор научно-­технической конференции «Лазерные производственные технологии», которая прошла в рамках IX Конгресса Технологической платформы РФ «ФОТОНИКА». Конгресс сопровождал 15‑ю юбилейную Международную специализированную выставку лазерной, оптической и оптоэлектронной техники «Фотоника. Мир лазеров и оптики‑2021». Развитие лазерных производственных технологий осуществляется комплексно: в процессах актуализации нормативной базы, создания усовершенствованного оборудования, написания программного обеспечения и математических моделей физико-­химических процессов, освоения технологий и получения новых материалов.
El género en la ley penal: crítica feminista de la ilusión punitiva
Authors:   CIEG-UNAM, Núñez Rebolledo Lucía
Published: April 2021

Con el estallido de la crisis de la violencia, que ha cobrado entre las mujeres una dimensión especialmente cruel, es legítimo preguntarse si la justicia penal puede ofrecer una solución efectiva. Para responder a esta pregunta, Lucía Núñez empieza por señalar la parcialidad del sistema penal, así como el hecho de que se basa en una lógica patriarcal y excluyente que se ejerce de manera masiva y sistemática contra los sectores más marginados de la población. En este libro, Núñez analiza una serie de leyes especialmente relevantes para las mujeres desde una perspectiva histórica y de género, demostrando la desigualdad estructural del sistema penal desde su concepción misma. En este sentido, hace una crítica al feminismo jurídico "punitivo", es decir, aquel que cree poder usar el derecho, y en general la justicia penal, para contrarrestar el daño y la violencia que sufren las mujeres. Expone su insuficiencia teórica y política y lo aborda como una ilusión peligrosa: si bien se obtiene el reconocimiento de los delitos contra las mujeres como crímenes, la mayoría de las veces esto conlleva la reducción de las mujeres a víctimas necesitadas de la protección del Estado. Ante este complejo problema, se propone el enfoque del minimalismo penal, que se basa en la convicción de que la garantía de la libertad no se encuentra en el ensanchamiento de un sistema punitivo desigual y sexista, sino en su limitación y en la efectividad de los derechos fundamentales.
Measurements of upper mantle shear wave anisotropy from stations around the southern Gulf of California
Authors: Van Benthem S. A. C. , Valenzuela R. W. , Obrebski M. , Castro R. R.
Published: April 2021

Se cuantificó la anisotropía sísmica del manto superior usando estaciones que rodean la parte sur del Golfo de California. El movimiento absoluto de la placa de América del Norte puede explicar las mediciones en la parte continental estudiada e implica que la litosfera arrastra al material de la astenosfera que se encuentra por debajo. Estas mediciones también son consistentes con la dirección de la extensión que ocurrió en la región de Cuencas y Sierras durante el Mioceno. Además las observaciones concuerdan con trabajos anteriores realizados en la región de Cuencas y Sierras, pero más al norte. El flujo astenosférico producido por la placa de Farallón subducida puede explicar la dirección anisotrópica rápida, orientada E-O, en el extremo sur de la península. Dicha explicación fue propuesta anteriormente para las estaciones de la mitad norte de la península. En la mitad sur de la península predominan valores de retraso pequeños y mediciones nulas. Estas mediciones difieren de las realizadas en el norte de la península. La existencia de fragmentos subducidos de las microplacas de Guadalupe y Magdalena podría explicar los pequeños valores de anisotropía observados. Una explicación alternativa podría ser el flujo ascendente de material caliente producido en la desaparecida dorsal de Magdalena ya que la placa subducida de Magdalena se había roto. La estación NE75, en la parte central de la península, parece registrar la transición entre los regímenes predominantes en el norte y el sur.
3D Simulations of the Quiet Sun Radio Emission at Millimeter and Submillimeter Wavelengths
Authors: De la Luz V. , Lara A. , Mendoza E. , Shimojo M.
Published: April 2021

Presentamos imágenes bidimensionales de simulaciones en 3D de la radioemisión solar en su régimen quieto a diferentes frecuencias, que van desde longitudes de onda centimétricas hasta submilimétricas (1.4, 3.9, 17, 34, 43, 110, 212 y 250 GHz). Construimos un modelo solar esférico 3D y resolvimos la ecuación clásica de transporte radiativo usando temperaturas y densidades electrónicas para el Sol Quieto. Comparamos nuestros resultados con observaciones del Nobeyama Radio Heliograph a 17 GHz. Las imágenes obtenidas a frecuencias de 3.9 GHz y 43 GHz serán de gran ayuda para calibrar las observaciones del nuevo telescopio milimétrico (RT5) que está siendo instalado en el Volcán "Sierra Negra", en el estado de Puebla, México, a una altitud de 4,600 m. Este proyecto es una colaboración entre el Instituto Nacional de Astrofísica Óptica y Electrónica (INAOE) y la Universidad Nacional Autónoma de México (UNAM).
Transport in the interplanetary medium of coronal mass ejections
Authors: Borgazzi A. , Lara A. , Romero-Salazar L. , Ventura A.
Published: April 2021

Las eyecciones de masa coronal (EMCs) son estructuras de plasma y campo magnético expulsadas desde el Sol hacia el medio interplanetario y generalmente observadas coronógrafos de luz blanca. Durante su viaje, estas estructuras, ahora llamadas eyecciones de masa coronales interplanetarias (EMCIs) sufren aceleración o desaceleración debido a la interacción con el viento solar circundante. Este proceso puede ser entendido como una transferencia de momento entre la EMCI y el viento solar siendo esta transferencia diferente en el caso de las EMCIs ‘rápidas’ y las EMCIs ‘lentas’ (comparando su velocidad con la del viento solar). Desde el punto de vista de la dinámica de fluidos, estamos interesados en estudiar el comportamiento de esta transferencia de momento considerando a la EMCI y el viento solar como la interacción de dos fluidos, aplicando la idea de esfuerzo viscoso, tomado en cuenta que, en este caso especial estamos tratando con interacción viscosa entre plasmas de baja densidad. Hemos resuelto para las EMCIs ‘rapidas’, la Segunda Ley de Newton considerando fuerzas viscosas, obteniendo una solución exacta para la velocidad de las EMCIs en función del tiempo. Se comparan los resultados analíticos con algunos modelos empíricos presentes en la literatura, y se sugieren valores para el coeficiente de viscosidad y arrastre en este sistema. Es importante mencionar que los resultados presentados, en esta primera aproximación, han sido obtenidos sin la presencia de un término que considere el campo magnético.
Absolute Thellier paleointensities from Ponta Grossa dikes (southern Brazil) and the early Cretaceous geomagnetic field strength
Authors: Cejudo Ruiz R. , Goguitchaichvili A. , Morales J. , F. Trindade R. I. , Alva Valdivia L. M. , Urrutia Fucugauchi J.
Published: April 2021

We report a detailed rock magnetic and Thellier paleointensity study from ~ 130.5 Ma Ponta Grossa Dike Swarms in Southern Brazil. Twenty-nine samples from seven cooling units were pre-selected for paleointensity experiments based on their low viscosity index, stable remanent magnetization and close to reversible continuous thermomagnetic curves. 19 samples characterized by negative pTRM tests, Arai concave-up curves or positive pTRM tests with NRM loss uncorrelated with TRM acquisition were rejected. High quality reliable paleointen- sity determinations are determined from detailed evaluation criteria, with 10 samples belonging to three dikes passing the tests. The site-mean paleointensity values obtained in this study range from 25.6 ± 4.3 to 11.3 ± 2.1 ?T and the corresponding VDM’s range from 5.7 ± 0.9 to 2.5 ± 0.5 (1022 Am2). These data yield a VDM mean value of 4.1 ± 1.6 x 1022 Am2. Significant variability of Earth’s magnetic field strength is observed for Ponta Grossa Dikes with the mean value being significantly lower as compared to the mean VDM obtained from the nearby Parana? Magmatic Province. The paleointensities for the Ponta Grossa Dikes are in agreement with abso- lute paleointensities retrieved from the submarine basaltic glasses from 130 to 120 Ma. It seems that a relativelylow field prevailed just before the Cretaceous Normal Superchron.
Deep structural setting of the North American-Caribbean plate boundary in eastern Guatemala
Authors: Lodolo E. , Menichetti M. , Guzmán-Speziale M. , Giunta G. , Zanolla C.
Published: April 2021

Se presenta un modelo bidimensional de gravedad para determinar la estructura en profundidad del sistema de fallas lateral-izquierda de Motagua-Polochic, que son parte del límite de las placas América del Norte y del Caribe. Estos elementos tectónicos, sismicamente activos, atraviesan oeste-este la región de Guatemala y se sobreponen a una línea de sutura donde afloran cuerpos ophiolíticos. En las principales zonas de desplazamiento de las fallas se han desarrollado cuencas de pull-apart y regiones de restricción (push-up). El análisis estructural de algunas de estas fallas, situadas a lo largo del valle Izabal y del valle Motagua, en combinación con los datos obtenidos del satélite, ha permitido determinar la cinemática y el patrón de estos sistemas. La geometría y la estructura superficial del límite de las placas han sido determinadas a partir de datos geológicos y perfiles sísmicos resultantes de estudios efectuados a lo largo de una línea de 60 km de longitud al este del Lago Izabal, perpendicular al límite de placas y que interesa el valle Motagua. El Lago Izabal es la mayor cuenca de pull-apart que se ha formado a lo largo del sistema cizallante de Polochic. Los datos obtenidos con el modelo de gravedad confirman las principales características del mapa de anomalías de Bouguer de la zona y explica la mayor parte de las anomalías de amplia longitud de onda, así como aquellas de tipo local asociadas a los cuerpos geológicos de la corteza superficial y sub-superficial. La determinación de la geometría, la profundidad de las cuencas sedimentarias asociadas al sistema cizallante, así como la profundidad de los cuerpos ophiolíticos de la zona de sutura, son los principales resultados derivados de la implementación del estudio geológico y geofísico.
Rare-earth element distribution in water from El Chichón Volcano Crater Lake, Chiapas Mexico
Authors: Morton-Bermea O. , Aurora Armienta1 M. , Ramos S.
Published: April 2021

Esta investigación puede considerarse como un estudio piloto en el volcán El Chichón para determinar si la distribución de los patrones normados de tierras raras (TR) pueden utilizarse como trazadores rutinarios en el sistema geotérmico del volcán. Dieciocho muestras de agua del lago alrededor del cráter fueron tomadas durante tres campañas de campo de marzo de 2006 a mayo de 2008. Los datos químicos han documentado cambios en la evolución del sistema hidrotermal, sin embargo, estas muestras no evidencian variaciones significativas en la geoquímica de tierras raras que corresponde a la estabilidad de la actividad volcánica observada durante el periodo de estudio. Las concentraciones de TR son altas y alcanzan valores entre 5.58 ppb (Ce) y 0.01 ppb (Lu). Los patrones normados de TR de muestras de agua de lago del Volcán El Chichón presentan enriquecimiento de TR pesadas con respecto a muestras pomez de la erupción de 1982 (representativas de la roca encajonante). La pequeña anomalía de Eu observada en muestras recientes puede haberse originado por el aumento de agentes acomplejantes tales como sulfatos solubles, cloruros y fluoruros. Cambios significantes en el comportamiento de las TR pueden estar asociados con cambios mayores de la actividad magmática, que no se han presentado durante el tiempo de estudio.
Groundwater differentiation of the aquifer in the Vizcaino Biosphere Reserve, Baja California Peninsula, Mexico
Authors: Brito-Castillo L. , Méndez Rodríguez L. C. , Chávez López S. , Acosta Vargas B.
Published: April 2021

La diferenciación de la calidad de agua en un acuífero puede ser útil como herramienta para el manejo del agua subterránea. En este trabajo, se aplicó el análisis de funciones empíricas ortogonales (EOF, por sus siglas en inglés) con rotación de ejes por el método varimax a 135 pozos, empleando para este propósito 12 parámetros de calidad de agua muestreada en la Reserva de la Biosfera del Vizcaíno, México. Los datos se obtuvieron del Instituto Nacional de Estadística, Geografía e Informática (INEGI). A partir del análisis EOF se retuvieron tres factores que juntos explican el 99% de la varianza en las series originales. La distribución de los coeficientes (factor loadings) con valores aiâ‰¥0.7 asociados a cada factor se agruparon en áreas geográficas específicas indicando la diferenciación del acuífero en tres áreas. Se discuten las diferencias de la calidad de agua entre las áreas. Una interpretación posterior de nuestros resultados empleando información sobre influencias naturales y antropogénicas, e información independiente de 28 pozos restantes monitoreados en 2003, otorgaron evidencia adicional para tal diferenciación, concluyendo que, aunque puramente estadístico el análisis EOF demostró ser útil en la diferenciación del acuífero. El enfoque empleado en este trabajo puede ser aplicado a otras áreas donde exista información química disponible del agua subterránea.
Evidence of tsunami events in the Paleolimnological record of Lake Pátzcuaro, Michoacán, Mexico
Authors: Garduño ­Monroy Victor Hugo , Soria Caballero Diana Cinthia , Israde ­Alcántara Isabel , Hernández Madrigal Víctor Manuel , Rodríguez ­Ramírez Alejandro , Ostroumov Mikhail , Rodríguez ­Pascua Miguel Ángel , Chacon ­Torres Arturo , Mora Chaparro Juan Carlos
Published: April 2021

El actual lago de Pátzcuaro tiene una elevación de 2035 m sobre el niel del mar. Históricamente, ha alcanzado ha alcanzado una elevación de 2041 m, lo cual aislaba una porción de la isla cerca de la población de Jarácuaro en la parte sureste del lago. Dos trincheras realizadas en la antigua isla revelan secuencias estratigráficas tripartitas similares. En una trinchera de 3.1 m de profundidad, la secuencia de la base a la cima está formada por la Unidad A que comprende arcillas y limos ricos en diatomeas plegados y fallados con capas de arena volcánica. Estos depósitos están fechados entre 24 y 10 mil años BP. Unidad B que comprende una mezcla caótica de arenas volcánicas y lapilli, con abundantes restos de peces, bivalvos, gasterópodos y ostrácodos, de 10 cm de espesor con un contacto erosivo sobre la Unidad A. Los ostrácodos incluyen valvas articuladas con una mezcla de especies pelágicas de agua profunda y especies litorales. Los fragmentos de artefactos cerámicos pertenecientes al Periódo Post-Clásico (900 a 1520 AD) son abundantes. La Unidad C comprende una unidad de 20 cm de espesor de limo arcilloso rico en materia orgánica con restos de gasterópodos, semillas, líticos angulares y fragmentos de piezas cerámicas del Post-Clásico. La Unidad B sugiere una resedimentación catastrófica de los depósitos del piso del lago atribuidos a un tsunami. La Unidad C es consistente con condiciones sublacustres que están históricamente documentadas de 1858 a 1947. Un tsunami en el Lago de Pátzcuaro en 1858 ha sido registrado históricamente. El tsunami pudo haber sido creado por movimientos de falla o colapso del flanco suroeste de la isla de Janitzio. La ola del tsunami pudo haber contribuido al rápido aumento del lago de Pátzcuaro después del evento sísmico de 1858.
Structural pattern of subsidence in an urban area of the southeastern Mexico Basin inferred from electrical resistivity tomography
Authors: Arango-Galván Claudia , De la Torre-González Brenda , Chávez-Segura René E. , Tejero-Andrade Andrés , Cifuentes-Nava Gerardo , Hernández-Quintero Esteban
Published: April 2021

La mayor parte de la zona urbana de la Cuenca de México está construida sobre los sedimentos de los antiguos lagos de Chalco, Xochimilco, México, Texcoco, Xaltocan y Zumpango, lo cual ofrece poca resistencia a las obras civiles que se asientan sobre ella. Adicionalmente, los requerimientos para el abastecimiento de agua potable para la población han generado la sobreexplotación de los acuíferos, exacerbando el fenómeno de subsidencia y el colapso de edificios, unidades habitacionales y caminos. Con la finalidad de entender el patrón de fracturamiento, así como su ubicación, se implementó un estudio geofísico con la técnica de tomografía de resistividad eléctrica en una zona poblada ubicada al sureste de la Cuenca de México. Cinco secciones bidimensionales fueron calculadas a partir de los datos de resistividad adquiridos. En todas ellas fue posible identificar un horizonte resistivo discontinuo probablemente compuesto por algún material ígneo extrusivo. Las discontinuidades de este horizonte pueden ser relacionadas con grietas o fracturas identificadas con antelación sobre la superficie y que afectan obras civiles. Además, un modelo tridimensional de resistividad fue calculado. La imagen 3D coincide con los resultados obtenidos de los modelos 2D, mostrando una capa resistiva con discontinuidades laterales. El patrón estructural de las fracturas inferido presenta una dirección preferencial NW-SE, el cual también genera el proceso de subsidencia en la zona, producido por la sobreexplotación del acuífero.
Climate Change Politics in Canada and the EU—from Carbon Democracy to a Green Deal?
Authors: Lederer Markus
Published: April 2021

The idea of a green deal transforming industrialized societies’ climate policies in a sustainable manner has become highly popular in various countries. The study takes up this notion focusing on climate policy initiatives in Canada and the EU, raising three interrelated issues: (i) on a descriptive level, the study asks where we stand and what has so far been achieved regarding climate policy; (ii) analytically, the study provides a theoretical explanation of why progress has been slow in the EU and hardly visible in Canada, making use of the concept of carbon democracy; (iii) on a prescriptive level, the study explores what will be needed to make a green deal successful, arguing that one has to accept that a green deal is a deeply political project that will create winners and losers and that not all losers can be compensated under the label of a “just transition”. The argument advanced is that the EU and Canada represent a form of carbon democracy in which the extensive use of carbon laid the foundation for establishing democratic institutions and strongly shaped them. The paper shows that the extensive influence of carbon-related activities not only empowers specific non-state agents but is rather deeply enmeshed in the societal and political genome of both regions’ polities. The claim that follows is that climate politics in Canada and the EU will have to be deeply transformative and therefore disruptive in order to be successful.
“TASARIM” KAVRAMINA YÖNELİK MODA VE GRAFİK TASARIM ÖĞRENCİLERİNİN METAFORİK ALGILARININ BELİRLENMESİ
Authors: UYSAL Hüseyin , ÖZDEMİR Çiğdem
Published: April 2021

Bu araştırmanın amacı moda tasarım ve grafik tasarım alanlarında öğrenim gören öğrencilerin “Tasarım” kavramına yönelik metaforik algılarını belirlemek ve bu iki bölüm öğrencilerinin metaforik algıları arasındaki benzerlik ile farklılıkları ortaya koymaktır. Araştırma, Giresun Üniversitesi Teknik Bilimler Meslek Yüksekokulu Tasarım Bölümü’nde okuyan 100 öğrenci ile gerçekleştirilmiştir. Bu 100 öğrenci 50 Moda Tasarım ve 50 Grafik Tasarım öğrencisinden oluşmaktadır. Araştırmanın verileri öğrencilerin “Tasarım………… gibidir, çünkü………………………………” cümlesindeki boşlukların tamamlanmasıyla elde edilmiştir. Nitel araştırma yöntemlerinden olgu bilim deseni kullanılan araştırmada, elde edilen veriler içerik analizine tabi tutularak incelenmiş ve uzman görüşleriyle birlikte literatür desteklenerek açıklanmıştır. Araştırma sonucunda Grafik ve Moda Tasarım öğrencilerinden “Tasarım” kavramı için toplam 44 farklı metafor elde edilmiş, uzman görüşleri ile “Birey, Maneviyat, Yaşam, Nesne ve Estetik” olmak üzere 5 farklı kategorilerinde ele alınmıştır. İki grubun metaforları arasında hem benzerlik hem de farklılıklar olduğu sonucuna ulaşılmıştır. Araştırma konu ile ilgili yapılan araştırmalara katkı sağlaması ve ilgili alandaki araştırmacılara örnek teşkil etmesi yönünden önemli görülmektedir.
Young people between the rural and the urban: the case of the agroboys and agrogirls in Bela Vista de Goiás
Authors: Vettorassi Andréa , Ferreira Lorrany dos Santos , Sofiati Flávio Munhoz
Published: April 2021

The text undertakes an analysis of young people in their rural contexts from the perspective of understanding how this social group, whether of urban or rural origin, experiences the cultural aspects of the rural universe in Bela Vista de Goiás, a town with an agricultural-based economy. The young people studied are characterized, due to their modernized way of dressing, as “agroboys” and “agrogirls”, having been influenced by the North American country and western style, by agribusiness and by the Brazilian cultural industry, thereby evidencing their existence between the rural-urban and the countryside-city. Certain conceptions of the studied group, all high school students, were identified, regarding the countryside and the city, their relationship with work, their origins, leisure practices and professional perspectives. It was concluded that these young people are living the logic of modernity and the ideal of a globalized world, with a predominant denial of the peasant project, which is linked to representations of the caipira – a yokel, of being backward, and to the production of a modernized way of living the rural.
Optimation of Auxin and Cytokinin on Enhanced Quality and Weight of Coffea liberica Somatic Embryos
Authors: Ardiyani Fitria , Setiti Wida Utami Edy , Purnobasuki Hery
Published: April 2021

Coffea liberica is a variety of coffee that tolerant to marginal land, especially peatlands. One of propagation methods in C. liberica is somatic embryogenesis(SE) which producing large number of true-to-type plant seedlings in a short time. This research aimed at studying the effect of application of plant growthregulator (PGR) on quality and weight of somatic embryo of C. liberica. Somatic embryo in development stage was induced by Murashige and Skoog medium containing cytokinin as benzyl amino purin (BAP) and auxin as 2,4-dichlorophe-noxyacetic acid (2,4-D). While cotyledonary embryo in germination stage was induced by Murashige and Skoog medium containing cytokinin (BAP) and auxins as 2,4-D, indole acetic acid (IAA) and naphthaleneacetic acid (NAA). The resultsshowed that the application of auxins and cytokinins on development stage affected the formation of embryos, texture of calli, color of calli and embryos, and weight of somatic embryo. It also influenced the shoot and root formation, color and weight of geminating embryos of C. liberica at the germinating stage. During the development stage, addition of 1 mg/L BAP in the absence of 2,4-D in MS medium produced the highest quality of somatic embryo of C. liberica. This medium also produced heaviest somatic embryos but with lighter callus. While in germination stage, all medium treatments produced a typical germinating embryo. Coffea liberica germinating embryo growth optimally on MS medium containing 0.5 mg/L BAP as a single chemical or 0.5 mg/L BAP in combination with 0.5 mg/L IAA for shooting development. Whereas on rooting development, addition of 0.5 mg/L NAA on MS medium produced an optimal germinating embryo. Moreover, germination embryo of C. liberica recorded the highest in terms of dry weight on MS media with addition of 0.5 mg/L BAP. Application of appropriate concentration of auxin and cytokinin is needed to support the formation of somatic embryo and germinating embryo.
DESIGN OF SYSTEM FOR MORE EFFECTIVE DATA ACTUALISATION IN SIMULATION
Authors: Mozol Štefan , Grznár Patrik , Krajčovič Martin
Published: April 2021

The main object of the article is a design system for faster data actualisation in Tecnomatix Plant Simulation software through the AttributeExplorer function and Microsoft Excel. Many companies that use simulation as the optimisation tool is meet the problem of the models up to date and actualisation time demands. The designed system that uses the AttributeExplorer function of the Tecnomatix Plant Simulation reduces the actualisation time demands for activities. The end part of the article contains a comparison of the normal manual data entry and time demands for using the designed system.
Weakly invasive metrology: quantum advantage and physical implementations
Authors: Perarnau-Llobet M. , Malz D. , Cirac J. I.
Published: April 2021

We consider the estimation of a Hamiltonian parameter of a set of highly photosensitive samples, which are damaged after a few photons Nabs are absorbed, for a total time T. The samples are modelled as a two mode photonic system, where photons simultaneously acquire information on the unknown parameter and are absorbed at a fixed rate. We show that arbitrarily intense coherent states can obtain information at a rate that scales at most linearly with Nabs and T, whereas quantum states with finite intensity can overcome this bound. We characterise the quantum advantage as a function of Nabs and T, as well as its robustness to imperfections (non-ideal detectors, finite preparation and measurement rates for quantum photonic states). We discuss an implementation in cavity QED, where Fock states are both prepared and measured by coupling atomic ensembles to the cavities. We show that superradiance, arising due to a collective coupling between the cavities and the atoms, can be exploited for improving the speed and efficiency of the measurement.
Manifestaciones neurológicas del herpes virus simple y varicela zóster
Authors: Lancheros Pineda Lina , Bernal-Pacheco Oscar
Published: April 2021

El espectro de manifestaciones neurológicas secundarias a la infección por la familia de virus Herpesviridae es heterogénea, depende de factores ambientales, de la susceptibilidad inmunológica del huésped (infección de por vida) y la susceptibilidad genética, entre otras variables. Así, el compromiso puede ser fatal en ausencia de un rápido diagnóstico y tratamiento. El objetivo de revisar la neuroinfección por herpesvirus tipo 1 (HSV-1), tipo 2 (HSV-2) y virus de la varicela zóster (VVZ) es profundizar en aquellas manifestaciones clínicas que generan compromiso del sistema nervioso central y periférico, así como contribuir a una detección y confirmación temprana de la infección, establecer un enfoque terapéutico adecuado, que depende del compromiso clínico, y, finalmente, minimizar las complicaciones y secuelas neurológicas a largo plazo.
Mucormicosis cerebral
Authors: Castillo Tamara Edgard Eliud , Montaño Lozada Juan Manuel
Published: April 2021

El Aspergillus es un moho oportunista, que se encuentra muy extendido en el medio ambiente. Las cepas de A. fumigatus, A. Flavus, A. Niger y otras especies de Aspergillus pueden habitar diferentes tipos de ambientes. Algunas especies, como Aspergillus fumigatus, pueden provocar una variedad de reacciones alérgicas e infecciones sistémicas potencialmente mortales en humanos, siendo responsable de más del 90 % de las infecciones. La incidencia de aspergilosis cerebral no se conoce, pero ha aumentado de manera notable en los últimos años, ya que ocurre principalmente en pacientes con inmunodeficiencia grave. En este apartado se realiza una revisión detallada sobre el Aspergillus, especialmente A. fumigatus, puesto que es un microorganismo poco conocido, con un limitado espectro de tratamiento, pero que representa una amenaza ominosa para la salud y la mortalidad en el ser humano.
Sindrome de Guillain-Barre variante axonal en pediatria: reporte de caso
Authors: Carregal María Sol , Ameri Camila , Yarcho María , Sbruzzi Agustina , Nasif Salome , González Fernanda
Published: April 2021

El síndrome de Guillain-Barré es una polirradiculoneuropatía inflamatoria aguda, caracterizada por debilidad simétrica de carácter progresivo, de inicio distal asociado con arreflexia y síntomas sensitivos leves. La variante NMAA es una entidad poco frecuente en América Latina. Se reporta el caso de un paciente de sexo masculino, de seis años, previamente sano, con diagnóstico de síndrome de Guillain-Barré variante axonal, secundario a cuadro de vías aéreas superiores. La importancia del reporte radica en informar al pediatra y a otros profesionales de la salud acerca de la existencia de esta entidad y así aumentar la sospecha diagnóstica, considerando su baja incidencia. Se destaca también la posibilidad de encontrar variabilidad en las formas clínicas típicas de presentación, como lo fue el caso presentado, ya que es un subtipo de la enfermedad que está clásicamente caracterizada como grave, de evolución tórpida y con frecuentes secuelas.