bluuebunny/crossref_metadata_2025_split huggingface dataset:
Expectativas dos alunos do primeiro semestre dos cursos de engenharia
Authors: Hoernig Junior Breno Arno , Fossatti Paulo 
Published: February 2019

O tema deste artigo está relacionado às expectativas apresentadas pelos alunos que iniciam sua jornada acadêmica numa Instituição de Ensino Superior Comunitária (IESC) no sul do Brasil. Este estudo tem por objetivo identificar as expectativas dos alunos ingressantes nos diferentes cursos de Engenharia oferecidos por Instituição de Ensino Superior Comunitária (IESC). A metodologia adotada é do tipo qualitativa descritiva, pois trata-se de um estudo de caso, onde participam do levantamento alunos das Engenharias. Foi feito um levantamento estatístico com os dados demográficos a fim de caracterizar o grupo de interesse da pesquisa, usando o programa aplicado a Estatística - SPSS. A seguir fez-se uma categorização das respostas associadas ao questionário aberto sobre suas expectativas, que foi aplicado aos alunos matriculados em uma disciplina de primeiro semestre. Os resultados apontam que os alunos têm expectativas voltadas à atividade profissional futura e, principalmente, a qualidade em sua formação acadêmica, que se mostrou como sendo a expectativa de maior ênfase. Sepùlveda (2013, p.1) chama atenção de que tal situação ocorre também no contexto da educação superior no Chile, onde ele menciona têm-se ” una generación ambiciosa que tiende a postergar el ingreso al mundo laboral y que reconoce en las credenciales educativas un requisito fundamental para su inserción en el mundo adulto”. Conclui-se que a expectativas dos alunos, apesar de incertas e muitas vezes inconstantes, devem ser objeto de interesse da instituição, a fim de que, ao atender estas expectativas estimule a permanência do aluno até a sua conclusão na graduação da Engenharia.
Potencial fotossensibilizante de extratos de plantas do agreste na técnica de terapia fotodinâmica
Authors: Nascimento Patrícia , Siqueira Bárbara , Cadengue Andrezza , Nascimento Talita Camila , Montalvo Gualberto , Falcão Rosângela , Moreira Keila 
Published: February 2019

Objetivo: Avaliar in vitroa ação dos extratos de Myracrodruon urundeuva, Stryphnodendron adstringense Sideroxylon obtusifolium como fotossensibilizantes da Terapia Fotodinâmica (TFD). Métodos:A atividade antimicrobiana frente Staphylococcus aureus foi testada utilizando uma matriz de planejamento fatorial 23com a finalidade de exibir os pontos experimentais nos distintos níveis das variáveis independentes, sendo estas: tempo de pré-irradiação, concentração do fotossensibilizante e tempo de irradiação. E os resultados foramavaliados através do modelo de regressão logístico no software R. Nos ensaios a fonte de luz empregada foi o laser vermelho InGaAlP no comprimento de onda de 660 nm e fluência de 70, 140 e 210 J/cm2, na potência de 100mW. Após a aplicação do laser, o conteúdo dos poços foi semeado em placas de Petri contendo Agar Müeller Hinton, incubadasem estufa microbiológica a 37 °C por 24 horas. Em seguida, a leitura das placas foi realizada usando o conceito de crescimento ou não de unidades formadoras de colônias. Resultados: Houve maior tendência de inibição bacteriana quando o tempo de pré-irradiação foi 5 minutos, concentração do extrato de 100µg/mL e tempo de irradiação de 60 segundos, utilizando os extratos de M. urundeuva eS. adstringens. Entretanto, S. obtusifolium não apresentou eficiência fotossensibilizante. Conclusão:Dentro das condições avaliadas, dois dos extratos de plantas testados apresentaram potencial como agente fotossensibilizante na terapia fotodinâmica. E foi possível apresentar para os mesmos modelos estatísticos de predição adequada para a atividade antimicrobiana nas condições estudadas.
Perception d’espèces agroforestières et de leurs services écosystémiques par trois groupes ethniques du bassin versant de Boura, zone soudanienne du Burkina Faso
Authors: Cissé Mohamed , Bationo Babou André , Traoré Salifou , Boussim Issaka Joseph 
Published: February 2019

En zone tropicale, les services écosystémiques associés aux espèces agroforestières sont peu connus. Une enquête ethnobotanique a été conduite dans le bassin versant de Boura pour appréhender la perception des espèces agroforestières et leurs services écosystémiques. Des interviews semi-structurées et des observations directes ont été réalisées auprès de 214 chefs d'exploitation (CE) appartenant aux groupes ethniques Sissala, Dagara et Mossi. Les caractéristiques socio-économiques des CE, les espèces ligneuses conservées dans les champs et leurs services écosystémiques ont été recensés. L’importance des espèces a été déterminée selon la méthode de l’indice culturel d’importance (ICT). Des tests de comparaison des réponses et des modèles linéaires généralisés ont été réalisés à l’aide du logiciel R.3.3.2. Au total, 64 espèces ligneuses appartenant à 59 genres et 30 familles ont été recensées. Ces espèces fournissent aux communautés 17 services écosystémiques répartis en quatre catégories. Vitellaria paradoxa (ICT = 10,45) et Parkia biglobosa (ICT = 7,80) sont deux espèces agroforestières clés pourvoyeuses de services écosystémiques à l’ensemble des communautés. L’ordination non métrique (NMS) de la matrice d’occurrence des espèces agroforestières indique qu’en dépit des similitudes de connaissances ethnobotaniques les groupes ethniques Dagara et Sissala manifestent différentes préférences dans la conservation d’essences ligneuses spécifiques dans les champs. Le groupe ethnique, le genre, la taille du ménage, le niveau d’éducation et l’expérience du chef d’exploitation sont les principaux facteurs déterminant la perception et la conservation des espèces agroforestières. La sélection d’essences végétales pour les interventions agroforestières doit tenir compte des facteurs socio-économiques déterminant les préférences des communautés.
Creating an Awareness Campaign Against the Fomo Phenomenon in Young Adults’ Social Media Usage
Authors: Basiroen Vera Jenny , Hapsari Adinda 
Published: February 2019

This research aimed to create an awareness campaign on raising the understanding of the topic as prevention toward the happiness and productivity-killing phenomenon or FoMO (Fear of Missing Out) phenomenon in young adults’ social media usage. Qualitaive method was applied in the research by (1) using questionnaire; (2) interviewing the psychological experts; (3) using secondary research such as books, journals, printed articles, and online sources. Then, the researchers drew a solution by analyzing the collected data. The distribution also focused on people who were active users of social media. This research finds that promoting positive thoughts in people who experience FoMO might be an effective solution to combat this type of anxiety. Therefore, the data become the underlying basis toward the making of SayNomoToFomo campaign. Its main strategy is to educate and encourage the target audience to understand and tackle FoMO using a mixture of interactive and printed medium.
Learning Strategies Used by the Students in Performance Assessment in EFL Classroom
Authors: Safitri Ida Dwi , Sumardi Sumardi , Supriyadi Slamet 
Published: February 2019

This research aimed to discuss performance assessment in Indonesia as well as learning strategies used by the students in its implementation. A qualitative case study was applied in this research. The researchers spread questionnaire and conducted an in-depth interview to derive the data. From the discussion, some conclusions are derived. First, performance assessment has advantages in EFL such as promoting high order thinking skill, making students familiar with various contexts of language use, presenting tasks which allow students to apply their knowledge and skills from several learning targets, using clearly defined criteria to evaluate how well the student has achieved this application, and increasing students’ motivation. However, there are disadvantages from this kind of assessment such as time-consuming, the assessment tends to be subjective, requiring intensive training for raters, and it may intimidate students. Furthermore, the students apply almost all of the learning strategies as follows meta-cognitive, cognitive, social, and affective strategies. The contribution offered by this research is to give evidence prevailing to Indonesian EFL learning. The teacher can support or provide students’ need by knowing their students’ strategies in learning. However, the students can adjust their learning strategies when performance assessment is implemented.
Implementation of Positive Language to Promote Effective Language Teaching Classrooms for State Junior High School
Authors: Rosyada Amrina , Widyastuti Ana , Ramadhianti Agustina 
Published: February 2019

The research aimed to determine the influence of positive language to promote the effective language teaching classrooms in state junior high school. The effective language teaching classroom was measured quantitatively by applying a correlational research design. The method conducted several steps as procedures of investigation in analyzing the data, namely: (1) data collection,(2) data analysis, and (3) data interpretation. Engaged by 142 students of eighth-grade and four language teachers, findings have shown that there is a positive correlation between positive language and effective language teaching classrooms. The results are hoped to be as teachers’ and students’ guidance in implementing positive language to building their effective language teaching classrooms, gaining their confidence and ability to learn and use knowledge and skills to interact and fully participate in education.
Actinomycetes as a Paramount Source of Biologically Important Enzyme Inhibitors – “A Boon to Mankind”
Authors: Siddharth Saket , Rai Ravishankar V. 
Published: February 2019

Background:Bioactive compounds from microorganisms have been widely studied for several biological, therapeutic and pharmaceutical importances. Bacterial secondary metabolites have proven their worth as a prolific source of antibiotics, antifungal, antiviral, anticholesterol and immunosuppressant. The majority of inhibitors are secondary metabolites of varying chemical moieties produced by microorganisms among which actinomycetes are most important due to their tremendous diversity. Actinomycetes are most economically and commercially important prokaryotes known for their metabolic versatility. They have gained attention due to their ability to produce novel bioactive compounds with many applications. This review provides an overview on well-established actinobacterial bioactive compounds used as enzyme inhibitors for the treatment and management of diseases and their future perspectives.Objective:We focused on actinobacterial bioactive compounds which were reported to possess enzyme inhibition activity. An extensive search on well-acknowledged enzyme inhibitors was done by referring to peer-reviewed research papers. The papers were screened on the basis of the significance of research work done.Results:The research papers referred in this review article suggest the potential of bioactive compounds as therapeutically important enzyme inhibitors. The actinobacterial compounds were found to possess enzyme inhibition potential and could be developed into an antibacterial, antifungal, antimetastatic, antidiabetic and antihypertensive agent. These inhibitors were structurally elucidated and belonged to the class of peptides, proteins and pseudotrisaccharides.Conclusion:The findings of this review paper highlight the enormous potential of actinomycetes and bioactive compounds as enzyme inhibitors of therapeutic and pharmaceutical importance.
Dispersive Liquid-Liquid Microextraction Based on Ionic Liquid and Spectrophotometric Determination of Bilirubin in Biological Samples
Authors: Avan Asiye A. , Filik Hayati 
Published: February 2019

Background:
An Ionic Liquid-based based Dispersive Liquid-Liquid Microextraction
(IL-DLLME) method was not applied to preconcentration and determination of bilirubin. Ionic
Liquids (ILs) are new chemical compounds. In recent years, Ionic Liquids (ILs) have been employed
as alternative solvents to toxic organic solvents. Due to these perfect properties, ILs have already
been applied in many analytical extraction processes, presenting high extraction yield and selectivity
for analytes.

Methods:
In this study, IL-DLLME was applied to biological samples (urine and serum) for the spectrophotometric
detection of bilirubin. For bilirubin analysis, the full-color development was based on
the reaction with periodate in the presence of hydrochloric acid. The high affinity of bilirubin for the
ionic liquid phase gave extraction percentages above 98% in 0.3 M HCl solution.

Results:
Several IL-extraction parameters were optimized and room temperature ionic liquid 1-butyl-
1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and ethanol were used as extraction and
disperser solution. The linear range was found in the range of 0.5-6.0 μM (0.3-3.5 μg mL-1) and the
limits of detection of the proposed method was 0.5 μM (0.3 μg mL-1). The proposed method was applied
for the preconcentration and separation of trace bilirubin in real urine samples. Also, the recoveries
for bilirubin in spiked biological samples (urine and serum) were found to be acceptable, between
95-102%.

Conclusion:
The proposed IL-DLLMEapproach was employed for the enrichment and determination
of trace levels of bilirubin in urine samples using NaIO4 as an oxidizing agent and Uv-vis spectrophotometric
detection. The periodate oxidation of bilirubin is rapid, effective, selective, and simple to
perform. The method contains only HCl, NaOI4, and an anionic surfactant. The method may be useful
for economizing in the consumption of reagents in bilirubin determining. The IL-DLLMEmethod
ensures a high yield and has a low toxicity no skin sensitization, no mutagenicity and no ecotoxicity in an
aquatic environment since only very low quantities of an IL is required. For full-color formation, no
any extra auxiliary reagents are required. Besides, the IL-DLLME technique uses a low-cost instrument
such as Uv-vis which is present in most of the medical laboratories.
The Application of TLC and Densitometry for Quantitative Determination of Meloxicam in Tablets
Authors: Parys Wioletta , Bober Katarzyna , Pyka-Pająk Alina , Dołowy Małgorzata 
Published: February 2019

Background:
Meloxicam is as a non-steroidal anti-inflammatory drug that indicates a strong
anti-inflammatory, analgesic and antipyretic activity. It is used in the treatment of osteoarthritis arthritis,
osteoarthritis and rheumatoid arthritis in the form of various pharmaceutical preparations.

Objective:
The aim of the work was an elaboration of chromatographic conditions enabling the complete
separation of impurities A and B from meloxicam and also its quantitative determination in tablets
with use of TLC combined with densitometry as well as the comparison of the method proposed with
that described in the literature by Starek and Krzek.

Methods:
The mixture of ethyl acetate: toluene: n-butylamine (2:2:1, v/v/v) was used as a mobile phase.
Determination of meloxicam was performed on silica gel and aluminium oxide plates. Chromatographic
conditions presented in this work are better than those described by Starek and Krzek.

Results:
Linearity of the method for both types of plates was in the range from 1.0 to 5.0 µg/spot. Limit
of quantification for silica gel plates was 0.18 µg/spot, while for aluminium oxide plates it was 0.26
µg/spot. Limit of detection has been also specified, 0.06 μg/spot for silica gel plates and 0.08 μg/spot
for aluminium oxide plates. The average amount of meloxicam in tablets obtained on silica gel plates
was 100.4%, and on the aluminium oxide plates it was 100.3%.

Conclusion:
The developed method of determination of meloxicam using thin layer chromatography
combined with densitometry turned out to be accurate, precise and specific. It can be successfully applied
in quality control of meloxicam.
Preparation and Evaluation of Chitosan Loaded Naproxen Nanoparticles by Emulsion Interfacial Reaction Method
Authors: Sailaja Abbaraju Krishna , Banu Juveria 
Published: February 2019

Aim:
The aim of this investigation was to develop and characterize naproxen loaded chitosan
nanoparticles by emulsion interfacial reaction method.

Methodology:
For emulsion interfacial reaction method chitosan was used as a polymer. In this
method, eight formulations were prepared by varying drug to polymer concentration.

Discussion:
Out of eight formulations prepared using emulsion interfacial reaction method EI8 formulation
was found to be the best formulation. The drug content was observed as 94.4%, entrapment efficiency
and loading capacity were found to be 87.5% and 75%, respectively. The mean particle diameter
was measured as 324.6nm and the Zeta potential value was found to be -42.4mv. In vitro drug release
data showed 97.2% of drug release rate sustained up to 12hrs.

Conclusion:
The results clearly reveal that EI8 formulation having the highest amount of drug was
considered as the best formulation because of its small mean particle diameter, good entrapment efficiency,
and stability.
Inheritance of Pedicel Characters and Their Association to Fruit Characters in Capsicum annuum L.
Authors: Setiamihardja Ridwan 
Published: February 2019

Fruit detachment force (FDF) has shown highly correlated to the pedicel size of Capsicum annuum L. The inheritance of pedicel size (length and diameter) and their correlation to the fruit size (length and diameter) were evaluated from the cross 'Serrano' x 'KRG'. Pedicel length and diameter apparently were inherited as quantitative characters, mainly in additive manner, with very low heritability estimates, 4.4% and 8.5%, respectively. Correlation coefficient between fruit diameter and pedicel diameter was positive and significant at 1% level. There was an indication of linkage or pleiotropy between fruit diameter and pedicel diameter.
Ultrasonic Quality Assessment of Polymer-Cement Concrete with Pet Waste as the Aggregate
Authors: Sokołowska J. J. , Zalegowski K. 
Published: February 2019

AbstractElaborating composites containing waste materials requires study of basic mechanical properties and assessment of their structure quality. The subject of investigation was PPC concrete where aggregate was substituted with PET remaining after beverages bottles grinding. Substitution was done up to 25% (by volume). Waste material was fractioned and applied in various granulations. The main goal was to indicate the influence of such modification on the composite mechanical properties and to examine composite structure quality at macro level. Since PET and quartz differ greatly in density, to perform such examination it was possible to apply the nondestructive ultrasonic method, one of the most common NDT techniques used in material science and industry. The paper presents the effects of substitution of quartz with PET on ultrasonic wave propagation in PCC. The ultrasonic test results (measurements of wave velocity) compared with results of destructive tests (flexural and compressive strength) showed great correlation.
Automation Detection of Driver Fatigue Using Visual Behavior Variables
Authors: Wang Yonggang , Ma Jingfeng 
Published: February 2019

AbstractTo examine the correlation of driver visual behaviors and subjective levels of fatigue, a total of 36 commercial drivers were invited to participate in 2-h, 3-h, and 4-h naturalistic driving tests during which their eye fixation, saccade, blinking variables, and self-awareness of their fatigue levels were recorded. Then, one-way ANOVA was applied to analyze the variations of each variable among different age groups over varying time periods. The statistical analysis revealed that driving duration had a significant effect on the variation of visual behaviors and feelings of fatigue. After 2h of driving, only the average closure duration value and subjective level of fatigue had an increase of one-fifth or more. After 4h of driving, however, all these variables had a significant change except for the number of saccades and pupil diameter measurements. Particularly, driver saccadic eye movement was more sensitive to driving fatigue, and the elderly were more likely to be affected by the duration of the drive. Finally, a predictor of driver fatigue was determined to detect the real-time level of fatigue and alert at the critical moment.
Tending Cutting and Target Diameter Tables for Northern Red Oak (Quercus rubra L.) Stands in Hungary
Authors: Rédei Károly , Csiha Imre , Rásó János , Kovács Csaba , Bakti Beatrix , Kiss Tamás , Keserű Zsolt 
Published: February 2019

Abstract
In addition to black locust (Robinia pseudoacacia L.) and hybrid poplars, northern red oak (Quercus rubra L.) can be considered the third most important exotic stand-forming tree species in Hungary. Due to its advantageous silvicultural and growth characteristics, as well as its wood utilization possibilities, the present area northern red oak stands occupy in the country amount to 15 thousand hectares. This study presents a new, simplified tending cutting table for northern red oak stands as well as an age-target diameter table suitable for quality log production within a rotation period of generally 80–85 years. The simplicity of the practice-oriented tables based on a relevant yield table may further the qualitative development of northern red oak management and wood utilization.
Tax Exemptions in Excise Duty in the Context of Fiscal Efficiency
Authors: Sygut Edyta 
Published: February 2019

Abstract
The basic function of taxes is the fiscal function, which consists in collecting revenue by public authorities. The imposition of non-fiscal functions on taxes causes the weakening of their basic function. The purpose of the article is to present tax exemptions, as well as to assess the fiscal consequences of their application in excise duty in Poland in 2012-2016.
The Polish excise duty solutions provide for numerous tax exemptions, whereby it should be noted that a significant part are attributable to EU solutions resulting from harmonisation of this tax. In light of the conducted research, it may be concluded that the applied tax exemptions have a significant influence on fiscal efficiency (causing an average revenue decrease of approximately 7% during the examined period).
Ruderal vegetation in Kryvyi Rih (Ukraine) – the class of Robinietea
Authors: Yeremenko Nathalia 
Published: February 2019

Abstract
The present paper studies the ruderal vegetation of the class of Robinietea in Kryvyi Rih. We present the spontaneous woody vegetation of parks and other artificial plantations. Urban landscapes remain unstudied phytosociologically despite the highly diverse habitat niches. We have carried out the comparisons of communities from other regions of Ukraine and adjacent territories. In total, four associations and one derivate community, belonging to three alliances, were identified and categorized as follows: Chelidonio-Acerion negundi (synanthropic tree communities with Acer negundo), Chelidonio majoris-Robinion pseudoacaciae (artificial and spontaneous plantations of Robinia pseudoacacia), Geo-Acerion platanoidis (artificial plantations of broad-leaved tree species). The ordination analysis indicates ecological differentiation of syntaxa investigated in Kryvyi Rih. The most important of them are soil aeration (Ae), the cryo-climate (Cr) and nitrogen content in soil (Nt). Critical revision of the class Robinietea syntaxonomy demands further current research.