bluuebunny/crossref_metadata_2025 huggingface dataset:
Efectos del hierro sobre estructura dentaria en niños de 3 – 10 años en el Centro Infantil Santa Dorotea semestre A-2017
Authors: González Scarlett Anabell , Pino Larrea José Fernando
Published: May 2021

Introducción: el hierro es un elemento que se prescribe en las afecciones generalmente de tipo anémico en los niños. Cuando este elemento se consume en dosis elevadas y en tiempos prolongados por lo general causa una afección denominada la mancha negra o tinción cromógena, que afecta a las piezas dentarias del niño. Metodología: se realizó un análisis descriptivo. La población fue de 40 niños, los cuales asistieron al Centro Infantil Santa Dorotea en el periodo 2017. Resultados: del estudio realizado, se tiene que el 80% de los casos presenta una pigmentación de mancha negra de tipo 1 (leve), el resto de los casos presentan una mancha negra de tipo 2 (moderada) no se registran datos severos de tinción. Se realizó una prueba de Chi-Cuadrado, para corroborar si existe una relación de dependencia entre tipo de mancha negra con el tiempo de ingesta. Discusión: en la presente muestra de estudio la incorrecta dosis de hierro tiene un efecto negativo sobre la estructura de las piezas dentarias provocando la mancha negra. Conclusión: mientras mayor sea el tiempo de ingesta aumentan los casos de pigmentación de mancha negra, no obstante, el tiempo de ingesta no influye para variar el tipo de mancha negra.
Niveles y factores asociados a la ansiedad dental previo procedimiento odontológico en clínica UCSG A-2017
Authors: Vásquez Muñoz Génesis Kassandra
Published: May 2021

Introducción: los distintos procedimientos odontológicos generan diferentes niveles de ansiedad en cada paciente y existen diversos factores que alteran o disminuyen la ansiedad dental. Objetivo: determinar los niveles y el grado de asociación entre los factores que intervienen en la ansiedad dental en pacientes que esperan realizarse algún procedimiento odontológico en la clínica UCSG A-2017. Metodología: se realizó un estudio descriptivo, transversal y analítico utilizando una encuesta que incluyó factores desencadenantes y la escala de Corah Modificada (MDAS) a 200 pacientes de la clínica UCSG A-2017 Resultados: el 45% de los casos obtuvo un nivel moderado de ansiedad, el grado de asociación de los factores determinados es de 50%, la prevalencia en mujeres de entre 31-40 años las cuales representan 9% de los casos y hombres en edades de 21-30 años siendo un 8% de los casos.
Prevalencia de trastornos temporomandibulares en pacientes total y parcialmente edéntulos de la clínica UCSG- A 2017
Authors: Noblecilla Gutiérrez Helen Nicole , Avegno Quiroz María Andrea
Published: May 2021

Se realizó un estudio de tipo clínico, transversal, analítico y correlacional en adultos total y parcialmente edentulos de 30 a 80 años de edad. Objetivo: determinar la prevalencia de trastornos temporomandibulares en pacientes total y parcialmente edéntulos del grupo de estudio. Metodología: la recolección de datos se realizó mediante una encuesta a todos los pacientes participantes de la investigación. Los signos y síntomas que se evaluaron fueron: dolor a la apertura y cierre mandibular, clic, crepitación, dolor a la palpación, dolor de la articulación temporomaxilar ausencia dentaria, dimensión vertical y tipo rehabilitación protésica existente. El examen clínico se realizó en la clínica odontológica de la UCSG donde se realizó las valoraciones de los signos y síntomas antes descritos. Resultados: El 66,67% de los pacientes presentó por lo menos un síntoma de trastornos temporomandibular. Los signos más frecuentes fueron los ruidos articulares, que se presentó en el 50% de los pacientes parcialmente edéntulos y el 10% en los pacientes totalmente edentulos. También se encontró un valor significativo de p=0.03 en relación al edentulismo total o parcial con relación al dolor de la ATM, lo que determina que existe una relación significativa entre edentulismo total-parcial y el dolor a la articulación termporomandibular.
Viabilidad de las células del ligamento periodontal usando solución genérica de Hank. Estudio in vitro
Authors: Cobo Granda Kelvin Paul , Unapanta Yanchaguano Jessy Gabriela
Published: May 2021

Introducción: un diente avulsionado puede ser reimplantado sin complicaciones si la reimplantación ocurre dentro de los primeros 20 minutos cuando se almacena en un medio seco, este tiempo puede aumentar de 1 a 3 horas si el diente se coloca en una solución de transporte adecuada hasta el momento de la reimplantación. Objetivo: reproducir una solución de transporte de uso exclusiva para la viabilidad celular del diente avulsionado en el Ecuador. Metodología: se usaron 62 dientes recientemente extraídos, y se almacenaron en las diferentes soluciones de transporte: leche, save a tooth, solución genérica de Hank (SGH), agua, suero fisiológico y Gatorade a distintos tiempos de almacenamiento: 30, 60 y 120 minutos, se procedió a realizar un raspaje del tercio apical con bisturí sobre una placa para luego ser teñidas y analizadas bajo microscopía. Resultados: los valores más altos de viabilidad celular se dieron en la temperatura de 9.5ºC, (SGH 75%, suero 70%, agua de la llave 70%, leche 60%, gatorade 60%). Sin embargo a temperatura de 23.5ºC, el único resultado representativo fue el de la SGH con 60% de viabilidad celular mientras que las otras soluciones no presentaban rangos representativos de viabilidad celular (Suero 45%, agua de la llave 40%, leche 25%, gatorade 45%). Conclusiones: la SGH presento resultados superiores en viabilidad celular del ligamento periodontal a temperatura de 23.5ºC (temperatura ambiente) en comparación con las otras soluciones de transporte.
Land Use Management in Colombo Municipal Council Area
Authors:   Department of Civil Engineering, University of Moratuwa, Sri Lanka, Pushpakumara T.D.C , Ranga K.G.M. ,   Department of Civil Engineering, University of Moratuwa, Sri Lanka
Published: May 2021

Colombo city is the commercial capital and the largest city in Sri Lanka. It is located on the west coast of the island and adjacent to the Greater Colombo area which includes Sri Jayawardenepura Kotte. It is the financial Centre of the island as well as a popular tourist destination. As the vast development in the city and the increase of the need of people, People used to gather in the city as well as around the city. So the land requirement of the city is being increased in various ways. So that monitoring the land use against the land use requirement is essential to identify the land use changing patterns in the city. The objective of this study is to detect the land use changes in the Colombo city Municipal Council area between years 2000 and 2016 using spatial data, non-spatial data of Colombo city and analysis data using GIS software.
Assessment of Capital Market Efficiency in COVID-19
Authors: Ahmed Fakrul
Published: May 2021

The study tries to focus on the efficiency of the capital market through investigating the randomness of return series of Dhaka Stock Exchange of Bangladesh. Due to COVID-19 pandemic the worldwide capital market faces higher volatility than before. The study finds the week form of efficiency level of Bangladesh capital market. Special focus on Run test, Auto correlation test, predictability of tock return using ARIMA model the weekend effect anomaly and momentum strategy investing. The study found that the hypothesis of randomness of the stock returns are rejected for stock price index changes by using random walk tests, normality of return distributions, runs test and at different lags using ARIMA and the momentum tests which assert Dhaka Stock Exchange is not efficient even in the weak form.
3D-Position Determination using GNSS Techniques – A Comparative Analysis
Authors: Adeseye Temitayo A. , Suara Gafar
Published: May 2021

This study was carried out to determine 3D-position of selected points within Obafemi Awolowo University. The points were located at Africa Regional Institute for Geospatial Information Science and Technology (AFRIGST), Central Technological and Laboratory Workshops (CTLW), main Bus Stop, Religion ground, New Environmental Design and Management (New EDM), and Spider building. China HuaCe Corporation (CHC) GPS and Promark 3 GPS were used to carry out observation on the selected points. The data gotten were post processed using GNSS solution software for Promark3, Compass software for CHC GPS and the result gotten were compared with the known coordinates of those points. The data was analyzed using Statistical Package for Social Sciences (SPSS) to determine the most accurate instrument between the two. The occupation time for the two instruments on each station was 45 minutes. Analysis of Variance (ANOVA) and Chi square Variance analysis were conducted, the result showed that there is no significant difference between the observations of the two instruments in comparison with the adjusted coordinate. It can be concluded that any of the two instruments can be used for 3D point positioning to obtain accurate result.
Documentação da prática pedagógica e avaliação na educação infantil
Authors: Gabriel Aparecida Garcia Pacheco , Silva Jacqueline Silva da
Published: May 2021

Este artigo é decorrente da pesquisa realizada para a dissertação intitulada Práticas Pedagógicas Investigativas na Educação Infantil: Cotidiano da Sala de Aula de Egressas do Curso de Pedagogia da Faculdade de Alta Floresta/MT. O objetivo neste estudo foi o de analisar como o ensino por investigação foi planejado e documentado, a partir das práticas junto às crianças no cotidiano de uma escola de educação infantil, por duas professoras da rede municipal de Alta Floresta/MT, egressas do curso de Pedagogia da Faculdade de Alta Floresta, no qual foram apresentadas à metodologia de trabalho por projetos. A metodologia utilizada, de abordagem qualitativa, buscou aproximar-se de alguns dos  pressupostos da pesquisa-ação. Para o exame dos dados, utilizou-se a técnica da análise de conteúdo,  a partir da qual se observou que as egressas, em suas práticas pedagógicas desenvolvidas por meio das estratégias investigativas, alcançaram uma aproximação ao princípio da investigação e da documentação pedagógica segundo a abordagem utilizada nas escolas de Educação Infantil, de Reggio Emilia/Itália.
HUBUNGAN DISPOSISI MATEMATIS DAN SELF-EFFICACY MAHASISWA
Authors: Utami Wanda Tri , Mustadi Ali , Marsigit Marsigit , Ibrahim Ibrahim
Published: May 2021

The writing of this article is a survey research with the aim of knowing the relationship between mathematical disposition and self-efficacy of PGSD/ PGMI students in universities throughout Indonesia. This study used a total of 37 public and private universities with 357 students using questionnaire data collection techniques. The data obtained were analyzed using quantitative descriptive. In addition, data analysis used Spearman's Rho. The results explained that the mathematical disposition with self-efficacy of PGSD / PGMI students in Indonesia based on the average questionnaire filling reached a correlation coefficient of 0.612 which was included in the very strong category. Sig. Value (2-tailed) obtained 0,000 which is smaller than 0.01 which means that there is a significant relationship between mathematical disposition variables and self-efficacy. This caused a strong positive relationship between mathematical disposition and student self-efficacy. AbstrakPenulisan artikel ini merupakan penelitian survei dengan tujuan mengetahui hubungan disposisi matematis dan self-efficacy mahasiswa PGSD/PGMI yang berada di Universitas se-Indonesia. Penelitian ini menggunakan subjek yang berjumlah 37 universitas negeri dan swasta dengan 357 mahasiswa dengan tekhnik pengumpulan data penyebaran angket. Data yang diperoleh dianalisis menggunakan deskriptif kuantitatif. Selain itu, analisis data menggunakan Spearman’s Rho. Hasil penelitian menjelaskan bahwa disposisi matematis dengan self-efficacy mahasiswa PGSD/PGMI yang berada di Indonesia berdasarkan rata-rata pengisian angket mencapai koefisien korelasi 0.612 yang termasuk dalam kategori sangat kuat. Nilai Sig. (2-tailed) didapat 0.000 yang lebih kecil dari 0.01 yang memiliki makna bahwa terdapat hubungan signifikan antara variabel disposisi matematis dengan self-efficacy. Hal tersebut menyebabkan hubungan positif yang kuat antara disposisi matematis dengan self-efficacy mahasiswa.
THE CREATIVE THINKING ABILITY IN ELEMENTARY SCHOOL MATHEMATICS PROBLEM SOLVING
Authors: Khoiriyah Ika Silfiana Arifatul , Purwanti Kartika Yuni
Published: May 2021

The creative Thinking Ability in Elementary School Mathematics Problem Solving. The purpose of this research is how to know the quality of learning used and how to find out the creative thinking ability in student problem solving. The subjects of this classroom action research were all fourth grade students of SDN Candirejo 01, West Ungaran District, Semarang Regency, 2020/2021 academic year. This research is a qualitative research. The results of this research indicate that 1) The learning quality shows good; 2) The creative thinking ability in solving mathematical problems is analyzed by paying attention to 3 criteria, such as fluency, flexibility, and novelty. Based on the discussion that has been done by researchers on 10 research subjects.
INTERNALIZATION PROCESS OF REASONING AND PROOF STANDARDS FOR ELEMENTARY SCHOOL TEACHERS IN MATHEMATICS LEARNING
Authors: Rosyidah Awal Nur Kholifatur , Umar Umar , Nurmawanti Iva , Hidayati Vivi Rachmatul , Maulyda Mohammad Archi
Published: May 2021

Reasoning and Proof ability are one of the five standards in NCTM. Its implementation in learning can be transformed into problem-based learning (PBL). The purpose of this study is to provide a description related to the internalization of Reasoning and Proof standards in the mathematics learning process in elementary schools. The type of research used is qualitative with descriptive analysis. The research subjects were 24 elementary school teachers in Cluster IV Mataram City. The data collection process was carried out by a survey method that was conducted online using the Google form platform. To strengthen the results of the questionnaire, interviews were also conducted via WhatsApp phone to each research subject. The results of the research showed that 45.8% (11 subjects) had never heard of the terms reasoning and proof, while 54.2% (13 subjects) had never heard of the terms reasoning and proof. The deepening of the results of this study found that the feasibility of Reasoning and Proof standards in learning was still not optimal. In addition, several interesting facts were found related to the method of proof that teachers often use, namely giving examples that are close to students (relate).
ANALYTICAL THINKING PROCESS OF STUDENTS IN SOLVING MATHEMATICAL PROBLEMS OF QUADRATIC FUNCTIONS
Authors: Azizah Naela Nur , Susiswo Susiswo , Sisworo Sisworo
Published: May 2021

Analytical thinking is an ability to observe objects thoroughly and solve facts comprehensively. This study is set to describe students' analytical thinking processes in solving mathematical problems, especially in quadratic functions. It employs a qualitative approach with qualitative descriptive research. The subjects in this study are one student with high mathematics ability, one student with medium mathematics ability, and one student with low mathematics ability of Tenth Grade of State Islamic Senior High School 3 Tulungagung. Data collection are carried out through task-based interviews. Meanwhile, data analysis technique are data reduction, data presentation, and conclusion Based on the results of data analysis and discussion, it is concluded that (1) The student with high mathematical ability pass several stages, namely differentiating, and organizing, he/he can solve the quadratic function problem properly according to the problem solving steps. (2) The student with medium mathematical ability can go through differentiating and organizing stages. But at the attributing stage, he/she are less able to solve problems based on the objectives.  (3) The student with low mathematical ability tends not to pass differentiating, organizing, and attributing analytical thinking stages. He/she are less able to solve quadratic function problems according to the solving steps.Keywords: Analytical thinking process; problem solving; quadratic functions
DEFRAGMENTATION THINKING STRUCTURE TO OVERCOME ERRORS IN ADDRESSING MATHEMATICAL PROBLEM
Authors: Andriani Siti Puri , Triyanto Triyanto , Nurhasanah Farida
Published: May 2021

This research is intended to describe students' procedural errors in solving problems derivative of algebraic functions and efforts to overcome these errors by using the defragmentation process. Error analysis is carried out based on the procedural error theory based on Elbrink which includes the following aspects of errors: 1) Mis-identification; 2) Mis-generalization; 3) Repair Theory; and 4) Overspecialization. The subjects in this study are students of class XII MIPA Islamic State Senior High School (MAN) 3 Tulungagung taken from snowball random sampling. In taking the subject, the researchers select one of the students who make procedural errors by considering the completeness of the students when solving the given problems based on the problem-solving phase according to Polya. Based on the results of this study, it is found that the procedural errors made by the students are repair theory errors and overspecialization.  The defragmenting process to correct these errors is intended to provide dis-equilibration and scaffolding. The results after the defragmenting process are the students can correct their mistakes and the structure of their thinking.Keywords: Defragmenting structure thinking; derivative algebraic functions; problem solving; procedural errors. AbstrakPenelitian ini bertujuan untuk menggambarkan kesalahan prosedural siswa dalam menyelesaikan masalah turunan fungsi aljabar dan upaya untuk mengatasi kesalahan tersebut dengan menggunakan proses defragmenting. Analisis kesalahan dilakukan berdasarkan konsep teori kesalahan prosedural menurut Elbrink yang mencakup aspek kesalahan sebagai berikut: Mis-identificstion; 2) Mis-generalization; 3) Repair Theory; dan 4) Overspecialization. Subjek dalam penelitian ini adalah siswa kelas XII MIPA MAN 3 Tulungagung yang diambil secara snowball  random sampling. Dalam pengambilan subjek dipilih salah satu siswa yang melakukan kesalahan prosedural dengan mempertimbangkan kelengkapan siswa ketika menyelesaikan masalah yang diberikan berdasarkan tahap pemecahan masalah menurut Polya. Dari hasil penelitian ini ditemukan bahwa kesalahan prosedural yang dilakukan siswa ialah kesalahan repair theory dan overspecialization. Proses defragmenting yang dilakukan untuk memperbaiki kesalahan tersebut ialah dengan memberikan dissequillibrasi dan scaffolding. Hasil yang diperoleh setelah proses defragmenting dilakukan ialah siswa mampu memperbaiki kesalahannya dan struktur berpikirnya.Kata kunci: Defragmenting struktur berpikir, kesalahan prosedural, pemecahan masalah, turunan fungsi aljabar.
ANALISIS PEMAHAMAN KONSEP SISWA PADA MATERI LOGARITMA DITINJAU DARI KEMAMPUAN AWAL MATEMATIKA
Authors: Aprilia Eka , Triyanto Triyanto , Indriati Diari
Published: May 2021

Tujuan penelitian ini adalah untuk menganalisis kemampuan pemahaman konsep matematis siswa ditinjau dari kemampuan awal matematika.penelitian ini adalah penelitian deskriftif eksploratif dengan pendekatan kualitatif. Penelitian ini dilaksanakan di SMA Muhammadiyah 5 Yogyakarta Tahun Ajaran 2020/2021 pada kelas X.subjek penelitian ini terdiri dari dua siswa dengan kemampuan awal tinggi, dua siswa kemampuan awal sedang dan dua siswa kemampuan awal rendah. Sumber data penelitian ini adalah hasil tes dan hasil wawancara. Focus penelitian ini adalah untuk mendeskripsikan pemahaman siswa tentang logaritma berdasarkan kemampuan awal yang dimiliki. Hasil penelitian ini menunjukkan bahwa pemahaman konsep siswa dipengaruhi oleh kemampuan awal yang mereka miliki. Sehingga siswa dengan kemamapuan awal tinggi mendominasi lebih menguasai indikatoer pemahaman  konsep dibandingkan dengan siswa berkemampuan awal sedang atau rendah.
Teaching Facilitators' Perceptions of the Contribution of Three Internship Workshops Models
Authors: Freedman Vered , Cucoş Constantin
Published: May 2021

Internship workshops as part of induction to teaching in teacher education in Israel consist of three models: face-to-face, online, and 'incubator'. The article examines workshop facilitators' perceptions of workshops' contribution. Mixed methods research included a questionnaire completed by 101 facilitators and statistically analyzed. Interviews were conducted with nine facilitators, three from each model and content and discourse analyzed. According to quantitative findings, no significant difference between workshop models and emotional support was perceived as stronger than professional support in all three models. Interview findings showed the clear presence of both emotional support and enhancement of a sense of self-efficacy. There were noticeable unique contributions in the two newer online and 'incubator' models, compared to the traditional face-to-face model implemented at the college. Both models promoted self-efficacy and emotional support, but each one relied on different strategies to provide the two types of contribution. In the online model, use of writing and connection with the facilitator promoted the contribution. In the 'incubator' model characteristics of the environment provided conditions for advancing support. The unique contributions have practical implications - workshops should integrate online and community-based components to promote interns' sense of well-being and professional competence as future teachers. These findings may add valuable knowledge, which may help policy makers and interns themselves, to make better decisions on integrating the internship workshops within the prosses of teacher education.
Use of Multisensory Room in the Development of Psychomotricity in students with Autism Spectrum Disorder and Intellectual Disability
Authors: Silvia Alexandrina Jucan , Cristian Stan , Stan Cornelia
Published: May 2021

The schooling of children with autism spectrum disorder (ASD) and severe intellectual disability (ID) in special schools, requires personalized professional intervention. Sensory, motor and psychomotor education of the disabled child is an important part of integration in all aspects: educationally, professionally, socially. Activities aimed for the development of the psychomotricity in children with ASD and severe ID are carried out in accordance with the requirements of the national curriculum for special-needs education. The multisensory room is a complex of multifaceted instrument. Our study aims to establish the level of efficacy of an intervention program comprising of activities for the development of psychomotricity carried out in the multisensory room, individualized for children with ASD and severe ID. Keywords: Autism Spectrum Disorder; Psychomotricity; Intellectual Disability; Special-Needs Education; Intervention Plan.
Online Education – a Reality of Our Times
Authors: Ispas Cristina
Published: May 2021

The current context generated by the COVID 19 pandemic has determined, as far as education is concerned, a substantial orientation of didactic activities towards online education. On a par with teachers, the students and parents were confronted with the more or less familiar reality of online education. The process of adaptation to this type of education was not deprived of obstacles but was also a source of satisfactions on the professional and personal level. The present study highlights the characteristics of the online education, the need for online education in the COVID 19 pandemic context, as well as the advantages and disadvantages brought about by this type of education.
Aspects that could be Enhanced during the Initial and Continuous Training of the Primary School Teachers from Romania
Authors: Meseșan Nicoleta-Eugenia , Marin Diana-Crina
Published: May 2021

Effective cooperation between parents and teachers has a huge effect on children's harmonious development. This study was conducted in order to establish the interests and the training needs of the teachers who are at the beginning of their careers. Recent studies have shown that children's positive school performances are strongly related to a high degree of family involvement in their education. The study has revealed that at the beginning of their teaching career some teachers felt vulnerable in the relationship with the parents. Also, some of them have lived negative experiences in the process of building an authentic partnership between the school and the families. The study has revealed that more attention should be given to pedagogical practice by creating contexts through which the future teachers organize and assist at activities with the parents. At the same time, the legislative framework regarding the activities of the mentors should be improved.
Experimental Program For School Integration Of Re-Migrant Middle School Students With Learning Difficulties In Romanian Language And Literature
Authors: Ilovan Rafila-Elisabeta
Published: May 2021

In contemporary society, the phenomena of territorial mobility / geographical mobility - migration (internal or external) and return migration / remigration (determined or forced), phenomena determined by various social and economic factors, are significantly accentuated. These complex and sensitive phenomena are increasingly attracting the interest of researchers and are often investigated in a multi- and interdisciplinary manner, with various implications: demographic, sociological, psychological, educational, axiological etc. From an educational perspective, external migration and return migration / family migration can have a major impact on children and various influences, which can be analyzed in formal, non-formal and informal contexts. The study approaches in formal educational contexts, a topic less explored in the literature, although it comes from the current educational reality. The analyzed issue was inspired by the didactic experience, as well as by the common interest of the professional community of teachers and of the scientific community for identifying and removing the difficulties encountered by remigrant students in the Romanian educational system.
Between Fear and Confidence. The influence of Feedback on a Student’s Self-Perceived Image
Authors: Câmpean Adina O. , Corcheș Horia
Published: May 2021

Through this article, we intend to analyse one of the tools by which we can influence the projection of a positive self-perceived image on primary school students. Our aim is to emphasise the importance of a conscious implementation of positive feedback, in teaching activities, designed to increase student involvement, to stimulate increased self-esteem, confidence and positive self-image.
Schelling y Aristóteles
Authors: Ramírez Cordón Miguel Ángel
Published: May 2021

Nos valemos del concepto de experiencia para tratar de demostrar que la relación entre ésta y lo ideal es indisoluble en Aristóteles y en Schelling en el conjunto de su producción. No existe entre lo real y lo ideal, por tanto, un orden de prioridad en lo tocante a las partes de su sistema, sino que únicamente asumen un orden de anterioridad y posterioridad por lo que hace a una necesidad de tipo metodológico. Con este análisis, por tanto, queremos demostrar que el orden de la experiencia y de lo ideal no es excluyente, sino que, al contario, están en un orden de dependencia gracias al cual tenemos como resultado una filosofía absoluta o la filosofía sin más, lo cual elimina cualquier unilateralismo que quiera conceder cualquier primacía ya bien a lo ideal o a lo real o la existencia en la filosofía de ambos autores.
Effects of Selenium on Bull’s Sperm Oxidative Stress and Viability Under in Vitro Conditions
Authors: Dolník M. , Mudroňová D.
Published: May 2021

The aim of this study was to determine the effects of sodium selenite on the level of oxidative stress and viability of spermatozoa in fresh bull ejaculate in in vitro conditions at different temperatures. Samples of the bull's ejaculates with a concentration of 7 × 105 spermatozoa per ml were placed into the commercial semen extender containing 0 (control), 1 (1Se), 3 (3Se) and 5 (5Se) µg.ml–1 of sodium selenite. The following analyses were performed by flow cytometry after 1, 3, 6, 8, 24, 48 and 72 hours of incubation at 4 °C and 37 °C. All analyses were carried out in triplicate. The level of oxidative stress at both temperatures were significantly lower in the experimental groups in comparison to the control group. However, a significant decline of live sperm concentration and a rise of damaged sperm concentration were recorded, especially in groups 1Se and 3Se in comparison to the control group. Only in group 5Se was there observed a positive effect on the damaged spermatozoa level in comparison with groups C, 1Se and 3Se at 4 °C. In conclusion, the applied concentrations of sodium selenite had a positive effect on the level of oxidative stress in all experimental groups, but mainly at concentration of 5 µg.ml–1 of sodium selenite, especially at 4 °C. However, the effect of selenium was not sufficient for improving the sperm viability.
Legal regulation of the Management Board of the National Fund for Environmental Protection and Water Management
Authors: Dąbrowski Tomasz
Published: May 2021

Legal regulations concerning the structure and functioning of the Management Board of the National Fund for Environmental Protection and Water Management are presented in this article. The analysis is based on the doctrine and judicial practice addressing interpretation of regulations concerning the authority. Membership, the procedures of appointing and dismissing the Fund’s Management Board, its tasks, modes of sitting and resolving, as well as documentation of its activities are discussed.
Extradition in the Light of Legal Solutions in the Republic of Kosovo - Experiences, Challenges
Authors: Thaçi Arsim , Zejneli Ismail
Published: May 2021

Beheld in terms of international law, its subjects such as states, governments or international organizations always communicate with each other based on the spirit of the provisions of the field of international law.

In the framework of the breaches, respectively the deliberate violation of these provisions, is the case of the so-called "Gulenists", where all the links of the system under which the extradition matter is built upon, are exempted.

Our country will keep this stain for a long time, while in the archives of justice it will be treated as a case that should not have happened, always based on the commitment to the strict implementation of the provisions of the field of international law that our state has always had. At least they should have been held accountable, even criminally; hence, such cases to have never been repeated in our country.

The lack of criminal accountability of the actors-senior state officials directly implicated in this case has left scars in our system, which at that moment is widely considered as a delayed system, while at an instant the whole commitment in this direction is shaken.

This stain could have been avoided post festum - even in the circumstances when it happened, that is, even in the situation when all the political actors had been implicated in this case.

In this regard, whilst analyzing the provisions we can assume that despite the deficiencies and continuously looking at the volume of legal provisions of this law, yet, we can consider that our system in this area has advanced and has ongoing initiatives to improve this system to the extent that could meet the requirements in relation to the dynamics of social and international relations.
EDITORIAL: MAJOR CHANGES TO THE EDINBURGH JOURNAL OF BOTANY
Authors: Wilkie Peter
Published: May 2021

The Edinburgh Journal of Botany has moved to online only and is now using the Diamond Open Access model. The journal will continue to publish high-quality, peer-reviewed scientific papers, but these will now be both free to publish and free to access.
Use it or Lose it: How Sexual Reproduction and Range Limits Interact in Decodon verticillatus
Authors: Thomsen Corrina
Published: May 2021

Why do most species live in a range that does not have a physical boundary? Mountains and oceans present obvious boundaries to range expansion, but most species’ range limits lack such obstacles, and end at a seemingly arbitrary point in space. These ranges generally represent a species’ niche, or the environments in which the species can grow, survive, and reproduce. Outside of this niche, individuals are poorly adapted to the environment and fail to create a viable population. Individuals at the range limit, however, exist in an environment that is similar to that outside of the range, and one might expect that they gradually adapt to these conditions and slowly expand their niche.  The fact that this does not commonly occur could indicate a failure to adapt in these individuals. Adaptation is largely driven by sexual reproduction, which recombines genes and can generate new genetic combinations. However, environmental conditions and population dynamics at the range limit could prevent sexual reproduction and cause populations to become asexual or clonal. Given enough time, this could lead to loss of reproductive traits, impacting the future evolutionary potential of range limit individuals. In this study, I investigate whether sexual reproduction is lost and the effect on key reproductive traits in the aquatic plant Decodon verticillatus at its Ontario northern range limit.
Pääkirjoitus: Tiedon hinta 2.0
Authors: Ala-Kyyny Juuso
Published: May 2021

Miksi pääsy tieteellisiin tutkimusjulkaisuihin on niin kallista? Tätä kysyy Bo-Christer Björk tuoreessa artikkelissaan, joka löytyy ajan hengen mukaisesti final draft -versiona DHanken-julkaisuarkistosta.
Tulevaisuus ilman kirjastoja ja kultamunia munivat kirjastot
Authors: Ala-Kyyny Juuso
Published: May 2021

Suomen tieteellisen kirjastoseuran marraskuinen verkkoseminaari tarjosi monisyistä pohdittavaa ja käytännön vinkkejä kirjastojen markkinointiin ja viestintään liittyen. Tilaisuuden pääpuhujat, professori Alf Rehn ja kirjastokonsultointia tekevä Zuzana Helinsky, lähestyivät kirjastomarkkinointia hyvin eri näkökulmista. Toisaalta puheenvuorot leikkasivat samoja ennakkoluulottoman arvioinnin, kokeiluihin uskaltautumisen ja kirjastotoiminnan vaikuttavuuden teemoja, jotka tarjoavat visioinnin ja suunnittelun lähtöpisteitä erilaisille organisaatioille.
Tieteelliset kirjastot vuonna 2030 – katsaus keskeiseen strategiatyöhön
Authors: Saarti Jarmo , Juppi Mira , Kautonen Heli , Tuominen Kimmo , Lahtinen Hanna , Willman Miia , Savolainen Liisa
Published: May 2021

Strategiaa voi tarkastella erilaisilla aikajänteillä ja erilaisista näkökulmista, strategiapaperia voi työstää ja toteuttaa monella tavalla. Tässä artikkelissa luodaan silmäys eri sektoreilla tehtävän strategiatyön viimeisimpiin viilauksiin – fokus on erityisesti 2020-luvun kehityksessä. Artikkelissa tieteellisen kirjastomaailman eri toimijat käsittelevät strategiaa omista lähtökohdistaan. Painotukset vaihtelevat, mutta toimintaympäristön analyysissä on myös yhteisiä piirteitä.
Kansalliskirjaston tutkijapalveluita kehitetään vertaisoppimalla
Authors: Näpärä Liisa
Published: May 2021

Kansalliskirjasto rakentaa digitaalisten aineistojen käyttöä edistäviä tutkijapalveluita Digitaalinen avoin muisti (DAM) -hankkeessa. Hanke parantaa digitaalisten aineistojen saatavuutta, saavutettavuutta ja käytettävyyttä. Samalla kehitetään tutkimusyhteistyötä ja oman henkilöstön osaamista teknisissä ja tutkimuksellisissa kysymyksissä. Artikkeli kertoo hankkeen kiinnostavasta eurooppalaisten yliopistojen ja library labien benchmarkkaustyöstä.
MENINGKATAN KETERAMPILAN MENGAJAR GURU DALAM MEMBIMBING DISKUSI KELOMPOK KECIL MELALUI PENDEKATAN KOLABORATIF
Authors: . Slamed
Published: May 2021

The purpose of this study was to determine: 1). How is the process of implementing a collaborative approach in an effort to improve teacher teaching skills in guiding small group discussions; 2). Whether a collaborative approach can improve teacher teaching skills in guiding small group discussions. This type of research is School Action Research. The results of the study concluded that: 1) The process of implementing a collaborative approach was carried out in 6 stages, namely: initial conversation, observation, analysis, final conversation, final analysis and discussion. 2) A collaborative approach can improve teacher teaching skills in guiding small group discussions at SMAN 2 Sintang, SMAN 1 Sepauk and SMA Sinar Kasih Sintang. This is indicated by the average value that has increased from cycle I to cycle II. The average value of teacher teaching skills in guiding SMAN small group discussions 2 Sintang increased by 17%, at SMAN 1 Sepauk increased by 16% and at SMA Sinar Kasih Sintang increased by 15%.
Effect of Liposome Curcumin Combined with PDGF-BB on Tendon Healing in Rats
Authors:   Department of Hand and Foot Surgery, Yangzhou University, China, TL Wang , WJ Wu ,   Department of Hand and Foot Surgery, Yangzhou University, China, JX Gu ,   Department of Hand and Foot Surgery, Yangzhou University, China, XR Hou ,   Department of Surgery, Soochow University, China #Equally Contributed
Published: May 2021

Objective: To study the effect of liposomal curcumin combined with PDGFBB on tendon healing after tendon injury in rats and explore its mechanism. Methods Thirty-six rats were randomly divided into four groups: healthy control group (group A), liposomal curcumin group (group B), PDGF-BB group (group C) and combined application group (group D). The rats in each group were divided into groups according to the experimental group. At the 4th and 8th weeks after operation, the general morphology, histomorphology, biomechanics and other aspects of rat tendon were detected and statistically analyzed. Results: The degree of tendon adhesion in group B and D was significantly less than that in group A and C, and the difference was statistically significant. The biomechanical test showed that the tendons in group C and D had higher strength and could withstand greater stress than those in group A and B. Conclusion: Liposome curcumin combined with PDGF-BB can significantly reduce the degree of adhesion after tendon injury, increase the strength of tendon healing, and significantly promote tendon healing.
Efficacy and Safety of Ibutilide for the Cardioversion of Atrial Fibrillation: A Systematic Review and Meta-Analysis
Authors:   Zhejiang University School of Medicine Children’s Hospital, China, CC Gong , Y Tang ,   Department of Critical Care Medicine, the Affiliated Hospital of Guizhou Medical University, China, Y Huang ,   Department of Critical Care Medicine, the Affiliated Hospital of Guizhou Medical University, China, X Liu ,   Department of Critical Care Medicine, the Affiliated Hospital of Guizhou Medical University, China
Published: May 2021

Background: Ibutilide has been approved for cardioversion of Atrial Fibrillation (AF), but its side-effects include a high risk of torsade de pointes, besides, one recent meta-analysis showed ibutilide was inferior to vernakalant for conversion (AF<7 days). Hence, the aim of this study is to evaluate the efficacy and safety of ibutilide for the cardioversion of AF within 90 days. Methods: The Embase, PubMed, Web of Science, Cochrane Central databases and clinical trials.gov were comprehensively searched for relevant studies from January 1991 to May 2020 using the keywords “ibutilide” and “atrial fibrillation”. Only Randomized Controlled Trials (RCTs) comparing ibutilide with placebo or other Anti-Arrhythmic Drugs (AADs) for the termination of AF (duration of AF ≤90 days) were included. The primary outcome was successful cardioversion in response to ibutilide versus placebo or other AADs within 4h. Related adverse events were defined as secondary outcomes. Results: A total of 1712 patients in 13 RCTs met the eligibility criteria. Four trials compared ibutilide to placebo; nine trials compared ibutilide to other active drugs. The results revealed that ibutilide had a higher success rate for the termination of recent-onset atrial fibrillation compared to placebo within 4h [Risk Ratio (RR), 4.64; 95% Confidence Interval (CI), 1.30-16.56, P=0.006]; and ibutilide also showed superiority to DL-sotalol, Propafenone, Procainamide for successful termination of recent-onset AF within 4h. As compared to other active drugs, Ibutilide was associated with a lower risk of hypotension (RR 0.23, 95% CI 0.09-0.57, P=0.002); but significantly increased the incidence of Polymorphic ventricular tachycardia (RR 3.78, 95% CI 1.08-13.23, P=0.04). Conclusion: Intravenous ibutilide could be an accessible choice for the cardioversion of recent-onset AF patients without contraindications, but under strict monitored condition is needed for at least 6 hours.
Virtual Reality to Help Older People in Nursing Homes: A New Way to Reduce Psychological Symptoms?
Authors:   Department of Geriatrics, CHU Nice, France, Ciszewicz AJ Vaillant , O Guerin ,   CoBteK, Université Côte d’Azur (UCA), France
Published: May 2021

Older people living in nursing homes often present with psychological symptoms such as depression, anxiety and apathy. Numerous studies focused on the effects of Virtual Reality (VR) in the older population. This innovative approach could lead to a significant reduction in psychological disorders in older adults and improve their quality of life.
Efficacy of Coenzyme Q10 in the Treatment of Cyclic Vomiting Syndrome in Children
Authors:   Reference Center for Inborn Errors of Metabolism of Nancy, France, F Brezin , A Wiedemann ,   Reference Center for Inborn Errors of Metabolism of Nancy, France, C Bansept ,   Reference Center for Inborn Errors of Metabolism of Nancy, France, E Albuisson ,   UMDS, CHRU Nancy, France, E Renard ,   Inserm Ngere 1256, 3 UMDS, CHRU Nancy, France, F Feillet ,   Inserm Ngere 1256, 3 UMDS, CHRU Nancy, France
Published: May 2021

Cyclic Vomiting Syndrome (CVS) is a chronic functional gastrointestinal disorder related to migraine, characterized by episodic nausea and vomiting. The treatment of CVS remains based on tricyclic antidepressants, triptans and antiepileptics. As mitochondriopathy has been involved in the pathophysiology of CVS, Coenzyme Q10 (CoQ10), a mitochondrial cofactor, has been used as the third line treatment in CVS. Considering the excellent safety profile of CoQ10, we decided to use it as the first line treatment in CVS. We retrospectively studied the evolution of 23 CVS patients who were treated for one year by CoQ10 alone. We recorded the characteristics of patients and their CVS history and compared data obtained the year before and the year following the prescription of CoQ10 treatment. We found a significant decrease in the number of vomiting episodes between the year before and the year after the start of CoQ10 (median [IQR]: 18.0 [15.75] vs. 3.00 [5.0]; p <0.001). This decrease persisted with time (2 and 3 years of treatment). The treatment was very efficient in 17/23 patients and did not decrease the number of vomiting episodes in 3 patients. Only one mild side effect related to the drug has been reported. Conclusions: CoQ10 is an efficient and safe treatment of CVS and should be used as the first line treatment in this episodic syndrome related to migraine.
Biological Markers Associated with Pulmonary Embolism in COVID-19
Authors:   1Department of Pulmonary Medicine, University of Barcelona, Spain, J Moises , I Blanco ,   1Department of Pulmonary Medicine, University of Barcelona, Spain, AR Garcia ,   1Department of Pulmonary Medicine, University of Barcelona, Spain, M Sanchez ,   Department of Radiology, University of Barcelona, Spain, J Aibar ,   Department of Internal medicine, University of Barcelona, Spain, M Benegas ,   Department of Radiology, University of Barcelona, Spain, R Andrea ,   University of Barcelona, Cardiovascular Institute, Hospital Clinic de Barcelona, Spain, JR Badia ,   Department of Pulmonary Medicine, University of Barcelona, Spain, P Castro ,   Department of Internal medicine, University of Barcelona, Spain, J Fernandez ,   Department of Hepatology and Gastroenterology, University of Barcelona, Spain, Jimenez Sonia ,   Department of Emergency, University of Barcelona, Spain, A Soriano ,   Department of infectious Diseases, University of Barcelona, Spain, JC Reverter ,   Department of Hemotherapy and Hemostasis, University of Barcelona, Spain, JA Barbera ,   CIBER de Enfermedades Respiratorias (CIBERES), Spain
Published: May 2021

SARS-CoV-2 infection may predispose to thrombotic complications. Most frequently Pulmonary Embolism (PE). The aim of this study was to identify predictive biomarkers for developing PE in patients with COVID-19. Methods: This study analysed retrospectively the data of patients with COVID-19 admitted to our institution that underwent CTPA scan due to suspected PE. Relevant laboratory data and radiology images were collected for each patient. Results: 100 patients with COVID-19 were included. 75 (75%) were male with a mean age of 65±15.3 years-old. Among 33 (33%) patients with confirmed PE, 22 (67%) had peripheral PE (subsegmental or segmental PE). There were no demographic or major clinical differences between patients with and without PE. Only systemic arterial hypertension was more frequent among non-PE patients. D-dimer levels were higher and ferritin levels were lower at the time of CTPA in the PE group compared to the non-PE group (9400ng/ml vs 4000ng/ ml; P<0.001 and 680ng/mL vs 1027ng/mL; P=0.013, respectively). 13 (13%) patients presented haemorrhagic complications without statistically significant differences regarding the type of anticoagulation administered. Mortality rate was 12% with no differences between PE and non-PE groups. On multivariable analysis, the D-dimer/ferritin ratio ≥6 (OR 7.17, 95% CI 2.6-19.4; P<0.001) emerged as independent variable associated to PE. Conclusions: The D-dimer/ferritin ratio in patients with COVID-19 may help identifying those at an increased risk of PE.