bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sealer penetration in the dentinal tubules
Authors: Khullar Sanjana , Aggarwal Anurag , Chhina Harleen , Kaur Tamanpreet , Sharma Mehak , Bala Deepak 
Published: June 2021

Context:
The penetration of sealer into dentinal tubules is considered to be a desirable feature as sealers prevent the colonization of residual bacteria into the dentinal tubules because of their antibacterial properties.

Aims:
This study aims to compare the depth of penetration of ADSEAL, Sealapex, and BioRoot RCS into the dentinal tubules in the apical area using confocal laser scanning microscope (CLSM).

Settings and Design:
Quality improvement projects.

Materials and Method:
After decoronating 120 extracted single rooted teeth, preparation was done using ProTaper universal rotary files until F3. Then, the samples were divided into four groups (n = 40) and obturated by the following endodontic sealers: Group A-ADSEAL, Group B-Sealapex and Group C-BioRoot RCS along with F3 gutta-percha cone. Before root canal filling, the sealers were mixed with 0.1% Rhodamine B dye. All the samples were sectioned at 3 mm and 5 mm from apex and visualized under CLSM.

Statistical Analysis Used:
Data were analyzed using two-way ANOVA and Tukey post hoc tests.

Results:
BioRoot RCS has shown significantly higher depth of penetration than resin based sealer and calcium hydroxide based sealer (α < 0.05).

Conclusion:
At all root regions, BioRoot RCS exhibited more tubular penetration whereas ADSEAL exhibited less penetration.
Penetration depth of sodium hypochlorite into dentinal tubules influenced by different agitation systems
Authors: Karad Keyur M. , Kolhe Swapnil J. , Gulve Meenal N. , Aher Gayatri B. , Kolhe Priyanka S. 
Published: June 2021

Objectives:
To compare the effect of different agitation systems on the penetration depth of sodium hypochlorite into dentinal tubules: An in vitro study.

Background:
Studies have found the presence of bacteria in dentinal tubule up to 200 μ. Passive irrigation using NaOCl may not adequately eliminate these bacteria. Hence, it is mandatory to use agitation systems during irrigation and disinfection of root canal.

Materials and Method:
Eighty extracted teeth with single canals were used. Standardized access cavity preparation and working length determination were done using visual method. All canals were instrumented till #30, 6%. All samples were immersed in crystal violet dye. The samples were randomly divided into four groups depending on the type of agitation system used (n = 20): Group A: manual dynamic agitation (MDA), Group B: EndoActivator (EA), Group C: EndoUltra (EU), and Group D: EndoVac (EV). Each agitation system was used with 5 ml of 5.25% NaOCl, and each tooth was sectioned into two halves. These sections were analyzed under a stereomicroscope, and NaOCl penetration depth was measured at coronal, middle, and apical third levels.

Statistical Analysis Used:
Statistical analysis was performed using one-way ANOVA and Tukey's post hoc test.

Results:
At all levels of examination, EU significantly showed a maximum penetration depth of NaOCl throughout the length of root canal, followed by EA, MDA, and EV.

Conclusion:
Ultrasonic agitation using EU is the most effective method to disinfect the dentinal tubules throughout the length of root canal than EA and MDA. EV showed the least penetration depth of sodium hypochlorite.
Use of natural mucilage extracted from the Stenocereus griseus (Cardón Guajiro) plant as a coagulant in the treatment of domestic wastewater
Authors: Dunoyer Arnulfo Antonio Tarón , Cuello Rafael Emilio González , Castillo Fredy Colpas 
Published: June 2021

Coagulants can be extracted from vegetal material and applied in the treatment of wastewater. These coagulants are derived from seeds, leaves, bark, roots and fruits. This study focuses on the use of the mucilaginous extract of Stenocereus griseus (known as Cardón Guajiro) for removal of biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total solids, turbidity and color in domestic wastewater from a pumping station in the city of Cartagena (Colombia). The optimal dose of S. griseus extract was determined by a pitcher test employing an E&Q F6-300 digital flocculator. All physicochemical tests were carried out following the specifications of the standard methods for wastewater (APHA). When 1400 mgL-1 of natural coagulants were used in the sewage treatment, the turbidity obtained was 29.57 TNU, representing removal of 67.24%, considering the initial turbidity. This parameter decreases until 68.61 PCU, for a 72.12% removal at the same coagulant dosage regarding the color. It must be noted that significant statistical differences were found between all tested doses of the coagulant. The mucilaginous extract of S. griseus exhibited useful properties in the primary treatment of domestic wastewater.
Effect of generator (exhaust) fumes on the growth and development of Lycopersicum esculentus (tomato)
Authors: Chukwu M.N. , Adams E.A. 
Published: June 2021

The effects of generator (Exhaust) Fumes on the growth and development of Lycopersicum esculentus were evaluated in this study. It involved sowing ten seeds of L. esculentus in plastic pots. These were allowed to germinate and stabilize for two weeks after which they were exposed to 0.75KVA generator fumes 8 hours a day at the distance of 3 m, 6 m, and 9 m respectively from the source while the control was retained at the planting site. Results were analyzed using analysis of variance (ANOVA) and Pearson’s correlation coefficient at 5% level of significance. Although the mean dry weights of the plants increased as the distance of the plants from the source of pollution increased, only the 3 m treatment led to significant reduction of the growth rate of the seedlings (p < 0.05). The heights of the plants were adversely affected by the fume emission especially at the distance of 3 m away from the source (p < 0.05). The leaf number per plant increased as the distance of the plants from the source of pollution increased with significant effects on plant from distance of 3 m and 6 m at the later stage of their growth (p < 0.05). Significant differences (p < 0.05) were observed among the plants in the different treatments for the different parameters measured.. Farmers should locate their farmlands at a distance of at least 50 km away from the factories to minimize effect of air pollutants and the government should also place a ban on importation of old generators.Keywords: generator fume, emission, Lycopersicum esculentus, growth, germination
Comparison of gas dehydration methods based on energy consumption
Authors: Kinigoma B.S. , Ani G.O. 
Published: June 2021

This study compares three conventional methods of natural gas (Associated Natural Gas) dehydration to carry out the dehydration process and suitability of use on the basis of energy requirement. These methods are Triethylene Glycol (TEG) absorption, solid desiccant adsorption and condensation. Analyses performed were based on dehydration of Natural Gas saturated with 103Nm3/h water content at a temperature range of -10O C to 30oC, and gas pressure variation between 7MPa and 20MPa. This analysis and study showed that energy required for all three processes decreases with increase in pressure, but condensation dehydration requires the least energy at high pressures. Results obtained shows that, both at high pressures and low pressures, TEG dehydration is most suitable and in cases where very low Tdew is required, solid desiccant adsorption is preferable. In conclusion, the findings in this paper will aid natural gas process design engineers to decide on what method to use base on energy consumption and on the physical and chemical properties of the final products.Keywords: Dehydration, Absorption, Desiccant, Condensation, Triethylene Glycol (TEG)
Evaluation of antibiotic resistance patterns and heavy metals tolerance of some bacteria isolated from contaminated soils and sediments from Warri, Delta State, Nigeria
Authors: Eghomwanre A.F. , Obayagbona N.O. , Osarenotor O , Enagbonma B.J. 
Published: June 2021

This work investigated the antibiotic resistance patterns and heavy metals such as Lead (Pb), Zinc (Zn), Cadmium (Cd) and iron (Fe) tolerance of selected bacteria isolated from contaminated soils and sediments around Warri area of Delta State. The heterotrophic bacterial counts for the sampled soils and sediments ranged from 1.7×105 cfu/g to 5.7×105cfu/g for Ubeji river sediments, 1.0×105 cfu/g to 9.0×105cfu/g for spare parts dumpsite and 1.2×104cfu/g to 9.0×104 cfu/g for Ifie depot sites respectively. The characterized bacterial isolates included; Klebsiella sp, Bacillus subtilis, Streptococcus sp., Escherichia coli, Klebsiella mobilis and Staphylococcus sp., Micrococcus sp. and Pseudomonas aeroginosa. Bacterial isolates showed multiple drug resistance and the most resistant isolates were S. aureus, E. coli and P. aeroginosa while K. mobilis exhibited the least resistance. The tolerance of the bacterial isolates exposed to varying concentrations of Pb2+, Cd2+, Fe2+, and Zn2+was ascertained using agar diffusion method. All the bacterial isolates exhibited varying degree of susceptibility at different concentrations of Pb and Cd while the organisms displayed abundant and moderate growth in the presence of Fe and Zn even at higher concentrations. The ability of these bacteria to resist antibiotics and heavy metal tolerance could present serious danger to the environment as the resistance genes may be transferred to surrounding wild type microbial cells.Keywords: Heavy metals, Antibiotics resistance, tolerance, Ubeji river sediments, Warri
Determination of Essential Oil Composition of Naturally Growing Heracleum platytaenium L. Plant in Bolu Ecological Conditions
Authors: Abdurrahim YILMAZ  , Vahdettin ÇİFTÇİ  
Published: June 2021

Heracleum platytaenium Boiss. (Öğrekotu) is a plant depend on the Apiaceae family, with intense aromatic content and known for its use in traditional medicine. This plant, which is one of the endemic plants of Turkey, is perennial and monocarpic. In this study, the essential oil of the Heracleum platytaenium Boiss., which grows naturally in the northern parts of Bolu province, was obtained by the hidro-distillation method in the Clevenger device and the essential oil components were investigated in the GC-MS device. As a result of the study, the essential oil ratio was determined as 1.4%. Octyl hexanoate (8.76%), 5-Octen-1-ol (7.04%), n-Octyl Caprylate (5.42%), and Beta-Eudesmol (5.01%) were determined as the main components. In this study, a total of 36 components (81.69%) were detected in the GC-MS device.
Percepciones sobre el abordaje de las Necesidades Educativas Especiales en la Práctica Profesional Virtual de Educación Física (Perceptions on addressing Special Educational Needs in the virtual professional practice of Physical Education)
Authors: Castillo-Retamal Franklin , Torres-Medina Alejandra , Herrera-Muñoz Marilyn , Faúndez-Casanova César 
Published: June 2021

El objetivo de este trabajo es conocer el nivel de atención a los estudiantes que presentan necesidades educativas especiales (NEE) en los centros de Práctica de Síntesis Profesional (PSP) de Educación Física (EF) en tiempos de pandemia. La metodología utilizada responde a un análisis de tipo cuantitativo mediante un estudio exploratorio. La población de estudio determinada fue de 79 profesores en formación que desarrollaron su proceso de PSP durante el año 2020 y la muestra, de tipo no-probabilística por conveniencia, corresponde a 63 individuos. Los resultados indican que un 65,1% de los centros educativos demostró preocupación por lograr la inclusión de todos sus estudiantes en tiempos de pandemia, sin embargo, un 34,9% tuvo carencias en este aspecto, asimismo, un 53,9% le otorga importancia a las NEE, por el contrario, y no menos importante, un 46,1% indica que esto no fue así. En conclusión, se determinó que, si bien existió atención en muchos de los centros educativos estudiados, algunos de ellos todavía requieren mejorar en este aspecto para atender a sus estudiantes con NEE, evidenciando en estos últimos un nivel descendido de atención.
Abstract.The objective of this work is to know the level of attention of the students who present SEN in the Professional Synthesis Practice centers (PSP) in times of pandemic. The methodology used responds to a quantitative analysis through an exploratory study. The study population determined was 79 students who developed their professional synthesis practice process during 2020 and the non-probabilistic sample for convenience corresponds to 63 individuals. The results indicate that 65.1% of the educational centers showed concern about achieving the inclusion of all their students in times of pandemic, however 34.9% had deficiencies in this aspect, likewise, 53.9% grant it importance to SEN, on the contrary and no less important, 46.1% indicate that this was not the case. In conclusion, it was determined that although there was attention in many of the educational centers studied, some of them still require improvement in this aspect to serve their students with SEN, appreciating a decreased level in the latter.
PENGARUH KEPEMILIKAN MANAJERIAL, UKURAN PERUSAHAAN, PROFITABILITAS, KEBIJAKAN DIVIDEN, KEPUTUSAN INVESTASI, STRUKTUR MODAL DAN INTELLECTUAL CAPITAL TERHADAP NILAI PERUSAHAAN PADA PERUSAHAAN KELUARGA YANG TERDAFTAR DI BURSA EFEK INDONESIA TAHUN 2016 – 201
Authors: Wahyuni Endang , Purwaningsih Endang 
Published: June 2021

This study aims to provide empirical evidence regarding the effect of managerial ownership, firm size, profitability, dividend policy, investment decisions, capital structure and intellectual capital on firm value.
The population of this study is family companies listed on the Indonesia Stock Exchange during 2016-2019. The sample of this research is 128 samples. Sampling using purposive sampling method, namely determining the sample from the existing population based on the criteria desired by the researcher. This study uses multiple linear regression to analyze the data.
The results of this study indicate managerial ownership has no effect on firm value, firm size has no effect on firm value, profitability has a significant positive effect on firm value, dividend policy has no effect on firm value, investment decisions have a significant positive effect on firm value, capital structure has a significant negative effect on firm value, and intellectual capital has no effect on firm value.
Grappling with the learning modules: Experience of Public Elementary Pupils Attending English Written Modular Classes
Authors: Panganiban Gladys L. , Madrigal Dennis V. 
Published: June 2021

Modular Distance Learning is one of the educational trends brought about by the pandemic. The recent use of this model of learning delivery has put teaching and learning into an adjustment period. This particular challenge has been the urgent imperative to have modular classes. It implies designing and organizing for better learning. English is the primary medium of instruction in education, and most of the modules written in the given language posing additional challenges and demands to school learners. Hence, this paper endeavors to investigate the lived experiences of the pupils in answering English-written modules through a qualitative design with a phenomenological approach. The participants of the study were eight Grade 6 pupils determined using the purposive sampling technique with some inclusion criteria. Data were gathered through an in-depth interview and were analyzed using a recursive textual analysis aided by Lichtman’s 3c's: coding, categorizing, and conceptualizing. The study revealed that quality education in the locality during this time of pandemic is greatly affected by the delivery modality, the curriculum content and standards, educational equipment and resources, the competence of parents to give assistance, and the readiness of the learners to read and learn independently.
MOVIMENTOS SOCIOESPACIAIS E SOCIOTERRITORIAIS DA AMÉRICA LATINA: UMA APRESENTAÇÃO DO DOSSIÊ DO I ENCONTRO LATINO-AMERICANO DE MOVIMENTOS SOCIOESPACIAIS E MOVIMENTOS SOCIOTERRITORIAIS (I ELAMSS) / The Socioterritorial and socioespatial movements of Latin America: a presentation of the dossier of the 1st Latin American Meeting of Sociospatial Movements and Socioterritorial Movements (I ELAMSS) / Movimientos socioterritoriales y socioespaciales de América Latina: una presentación del dossier del I Encuentro Latinoamericano de Movimientos Socioespaciales y Movimientos Socioterritoriales (I ELAMSS)
Authors: Arteaga Pertuz Marcia , Mançano Fernandes Bernardo 
Published: June 2021

Este dossiê traz um registro histórico do I Encontro Latino-americano de Movimentos Socioespaciais e Movimentos Socioterritoriais (I ELAMSS). Além de apresentar alguns dos trabalhos apresentados no evento e os aprovados no processo seletivo do edital da Revista NERA, incluímos um breve histórico deste evento científico e da construção dos conceitos aqui estudados. Esta publicação possibilita ao leitor conhecer temas debatidos no I ELAMSS, sua história e os debates teóricos. Há mais de vinte anos os estudos sobre movimentos na geografia mudaram, com a construção de um método autônomo que criou conceitos originais e dialogou com os conceitos da sociologia, destacando as diferenças de análises com a geografia. A construção de um pensamento original tem sido a marca das pesquisadoras e dos pesquisadores que formam a REDE DATALUTA e a rede de pesquisa internacional que estudam as ações dos movimentos socioespaciais e socioterritoriais na América Latina e em outros continentes. Além das escadas local, nacional e internacional de estudos dos movimentos, também ampliamos os espaços e acompanhamos suas ações no campo, na cidade, na floresta e na água. E nestes espaços, trabalhamos com uma tipologia em movimento e uma temática que se faz durante a transformação das realidades. Como citar este artigo: PERTUZ, Marcia Arteaga; FERNANDES, Bernardo Mançano. Movimentos socioespaciais e socioterritoriais na América Latina. Revista NERA, v. 24, n. 57, p. 09-23, Dossiê I ELAMSS, 2021.
Supervivencia a largo plazo posterior a la radioterapia definitiva combinada con terapia sistémica en carcinoma de células escamosas de cabeza y cuello localmente avanzado en una sola práctica médica en Medellín, Colombia.
Authors: Lema Medina Mauricio , Lema Calidonio Camila , Preciado Beatriz Elena , Quiceno Diana Marcela , Mora Sandra Paulina 
Published: June 2021

Objetivo: Dar a conocer los resultados de supervivencia en una cohorte de pacientes con carcinoma de células escamosas de cabeza y cuello localmente avanzado tratados en Colombia. Materiales y métodos: Estudio observacional, retrospectivo, con análisis de supervivencia. Se obtuvieron las características clínicas y los resultados de los pacientes adultos con carcinoma de células escamosas de cabeza y cuello localmente avanzado, tratados entre 2001 y 2018 en una sola práctica médica en Colombia. Se realizó el análisis de supervivencia con curvas de Kaplan-Meier. Se utilizó el paquete estadístico SPSS v 22. Resultados: Se incluyeron 60 pacientes, el 70% hombres. El 30% presentaron carcinomas orofaríngeos. Se encontraron 29(48,3%) pacientes en estadio IVA. La cirugía con intención curativa se realizó en 17(28,3%). Se administró quimiorradioterapia o bioradioterapia concomitante a base de cisplatino con cetuximab a 29(48,3%) y 12(20%) pacientes, respectivamente; mientras que 19 (31,7%) fueron tratados con radioterapia y quimioterapia en varios enfoques secuenciales o alternos. No hubo muertes relacionadas con el tratamiento en esta cohorte. En los 41 pacientes tratados con radioterapia concomitante con cisplatino o cetuximab, la supervivencia a los 50 meses fue del 75,5%, y no se registraron más progresiones ni muertes en el seguimiento posterior. La mediana de seguimiento fue de 35, 2 (14,8- 73,8 meses). Tanto la mediana para la supervivencia global como para la supervivencia libre de enfermedad fue de 118,9 meses (IC95%: 0-1). Al comparar la supervivencia global entre los pacientes que pertenecen al régimen de salud subsidiado versus contributivo, se encontraron diferencias estadísticamente significativas (HR 3,9; IC 95%: 1,5 -10,5; p <0,01). Conclusión: La integración de la terapia sistémica a la radioterapia definitiva en el tratamiento de este carcinoma en Colombia resultó en una supervivencia similar a la de los países desarrollados.
Supervivencia global y supervivencia libre de progresión en pacientes con cáncer de ovario avanzado en la era del bevacizumab : experiencia en un centro oncológico de Medellín-Colombia.
Authors: Lema Medina Mauricio , Preciado Franco Beatriz , Moran Ortiz Diego , Luján Piedrahíta Mauricio , Egurrola Pedraza Jorge , Lema Calidonio Camila 
Published: June 2021

Objetivo: Describir los aspectos clínicos, la supervivencia libre de progresión (SLP) y la supervivencia global (SG) en una cohorte de pacientes con cáncer de ovario avanzado y establecer las diferencias entre las tratadas con quimioterapia con o sin bevacizumab en la Clínica de Oncología Astorga, Medellín. Materiales y métodos: Estudio observacional de una cohorte retrospectiva de pacientes que recibieron tratamiento entre 2012 y 2018, con análisis de supervivencia. Se realizó estadística descriptiva Kaplan-Meier para la supervivencia general y por grupo, y se estimó el cociente de riesgo (HR). Resultados: Se incluyeron 49 pacientes. La edad mediana fue 63 años (RIQ: 54-68), 29 (59 %) con histología serosa, 24 (49 %) en estadio IV, 35 (71 %) requirieron cirugía, con citorreducción primaria en 23 (66 % de las llevadas a cirugía). 24 (49 %) pacientes recibieron bevacizumab. La mediana de seguimiento fue de 24 meses, con 32 progresiones y 22 fallecimientos. Las medianas de SG en la cohorte total, con y sin bevacizumab fueron de 46 (IC95 %: 16-75), 37 (IC95 %: 21-53) y 61 (IC95 %: 15-106) meses, respectivamente. Las medianas de SLP en la cohorte total, con y sin bevacizumab fueron de 20 (IC95 %: 16-24), 18 (IC95 %: 13-23) y 36 (IC95 %: 13-59) meses, respectivamente. No se encontraron diferencias estadísticamente significativas entre los grupos para SG (p=0.882) y SLP (p=0.312). Conclusiones: No se encontraron diferencias estadísticamente significativas, al comparar los grupos de pacientes que recibieron quimioterapia con y sin bevacizumab en esta cohorte de pacientes con cáncer de ovario avanzado.