bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessing causes and associated water levels for an urban flood using hydroinformatic tools
Authors: Pinho J. L. S. , Vieira L. , Vieira J. M. P. , Venâncio S. , Simões N. E. , Sá Marques J. A. , Santos F. S. 
Published: June 2019

Abstract
Flood events are dependent on meteorological conditions but also depend on several other factors that are case specific, with relevance for reservoir operation. Hydrological and hydrodynamic models are valuable tools for understanding complex river hydrodynamics during flood events. These tools have been applied to improve understanding of the causes for an urban flood event that occurred between 9 and 11 January 2016 in the Mondego river basin, at Coimbra city (Portugal). Seven different factors that can, independently, influence the river flow at the study site were identified: three of them can be associated with the operational discharge schemes of the three upstream dams; two factors with the runoff flows from uncontrolled contributing sub-basins; another one related to discharge measurement uncertainty at a downstream dam; and finally, the seventh studied factor was sedimentation occurring in the main channel of the flooded river stretch. Hydroinformatic tools were applied in different scenarios allowing the characterization and identification of each one of the identified key factors responsible for the flood event. A proposal for a flood early warning system is presented based on the knowledge resulting from the studied flood event.
Transpiration effect of Tufted sedge for a horizontal subsurface flow constructed wetland
Authors: Dittrich Ernő , Salamon-Albert Éva , Somfai Dávid , Dolgos-Kovács Anita , Kiss Tibor 
Published: June 2019

Abstract
We studied water loss performance in a model plant, the Tufted sedge (Carex elata All.), which is an active water balance component of subsurface flow constructed wetlands. Due to active regulation of transpiration, the volume and dynamics of water loss in these constructed wetlands are difficult to plan without preliminary and targeted measurements and calculations with regard to the specific plant component. We estimated transpiration values in the laboratory based on daytime transpiration ranges for spring, summer and autumn, and examined the transpiration effect of the hydraulic load. During spring, water loss via transpiration can reach 83% of the hydraulic load on certain days. During summer, this value can increase to 100% of the hydraulic load, which means that the daytime transpiration can significantly affect effluent concentration. Air humidity proved to be the most critical environmental factor for water loss resulting from transpiration, therefore a water discharge plan designed in such a way as to be able to also adjust soil moisture is the key to optimal water circulation at the system level.
The short- and long-term inhibitory effects of Fe (II) on anaerobic ammonium oxidizing (anammox) process
Authors: Mak Cherh Yih , Lin Jih Gaw , Chen Wen Hsing , Ng Choon Aun , Bashir Mohammed J. K. 
Published: June 2019

Abstract
The application of the anammox process has great potential in treating nitrogen-rich wastewater. The presence of Fe (II) is expected to affect the growth and activity of anammox bacteria. Short-term (acute) and long-term effects (chronic) of Fe (II) on anammox activity were investigated. In the short-term study, results demonstrated that the optimum concentration of Fe (II) that could be added to anammox is 0.08 mM, at which specific anammox activity (SAA) improved by 60% compared to the control assay, 0.00 mM. The inhibition concentration, IC50, of Fe (II) was found to be 0.192 mM. Kinetics of anammox specific growth rate were estimated based on results of the batch test and evaluated with Han-Levenspiel's substrate inhibition kinetics model. The optimum concentration and IC50 of Fe (II) predicted by the Han-Levenspiel model was similar to the batch test, with values of 0.07 mM and 0.20 mM, respectively. The long-term effect of Fe (II) on the performance of a sequencing batch reactor (SBR) was evaluated. Results showed that an appropriate Fe (II) addition enhanced anammox activity, achieving 85% NH4+-N and 96% NO2−-N removal efficiency when 0.08 mM of Fe (II) was added. Quantitative polymerase chain reaction (qPCR) was adopted to detect and identify the anammox bacteria.
Cellulose Acetate Nanofibrous Membranes for Antibacterial Applications
Authors: Ma Zhipeng , Lin Xinghuan , Ren Xuehong 
Published: June 2019

Background:
N-halamine antibacterial materials have been extensively explored over the
past few decades due to their fast inactivation of a broad spectrum of bacterial and rechargeability.
Electrospun nanofibers loaded with N-halamines have gained great attention because of their enhanced
antibacterial capability induced by the larger specific surface area. The patents on electrospun nanofibers
(US20080679694), (CN2015207182871) helped in the method for the preparation of nanofibers.

Methods:
In this study, a novel N-halamine precursor, 3-(3'-Chloro-propyl)-5,5-dimethylimidazolidine-
2,4-dione(CPDMH), was synthesized. Antimicrobial electrospun Cellulose Acetate
(CA) nanofibers were fabricated through impregnating CPDMH as an antimicrobial agent into CA fibers
by the bubble electrospinning. The surface morphologies of CA/CPDMH nanofibrous membranes
were characterized by Scanning Electron Microscope (SEM).

Results:
The chlorinated fibrous membranes (CA/CPDMH-Cl) exhibited effective antimicrobial activity
against 100% of S. aureus and E. coli O157:H7 within 1 min and 5 min, respectively. The
CA/CPDMH-Cl nanofibrous membranes showed good storage stability under the dark and excellent
durability towards UVA light exposure. Meanwhile, the release of active chlorine from the chlorinated
nanofibrous membranes was stable and safe. Besides, the addition of CPDMH could improve the mechanical
property, and chlorination did not obviously affect the strength and elongation of the nanofibrous
membranes.

Conclusion:
CPDMH could endow the electrospun CA nanofibers with powerful, durable and regenerable
antimicrobial properties. It will provide a continuous and effective method for health-care relative
industrial application.
Antioxidant Activity and Chemical Composition of Helichrysum lacteum Coss. & Dur.
Authors: Arrif Souad , Benkhaled Mohammed , Haba Hamada , Mouffouk Soumia 
Published: June 2019

Objective: :
The objective of the present study was to measure antioxidant activity and to
evaluate the phytochemical constitution of Helichrysum lacteum growing in Algeria.

Methods: :
The structure elucidation of the isolated compounds was performed by spectroscopic
methods. Antioxidant activity of the extracts the crude extracts (PE, EtOAc, and n-BuOH) and pure
compound (noryangonin (3)) was investigated by 5 methods, including DPPH free radical scavenging
activity, reducing power and ferric thiocyanate methods, hydrogen peroxide scavenging capacity,
and total antioxidant activity by phosphomolybdate assay.

Results: :
The chemical investigation of the EtOAc extract of the aerial parts of H. lacteum led to the
isolation of two flavonoids, astragalin (1) and isoquercitrin (2), together with a styryl pyrone,
noryangonin (3), and a cyclobutane dimer, achyrodimer C (4) as well as two triterpenoid compounds,
β-sitosterol (5) and oleanolic acid (6). The highest phenolic and flavonoid contents were detected
in the ethyl acetate extract. Noryangonin exhibited the highest antioxidant activity than those
of the references and all the tested extracts, with a value of IC50 at 1.45±0.44 μg/mL in DPPH scavenging.
In hydrogen peroxide scavenging essay, the results revealed that EtOAc extract exhibited
the highest percent inhibition (63.15 %) as compared to the ascorbic acid (63.36 %) at the concentration
of 100 μg/mL. In the phosphomolybdenum method, the EtOAc extract showed the strongest
activity (36.85±0.02 μg EAA/mg ex) as compared to those of n-BuOH and PE extracts.

Conclusion: :
The antioxidant property shown in these findings needs further investigation, especially
with the pure compound (3).
Drying kinetics as a new tool for the estimation of pore size of materials
Authors: Mata-Segreda Julio F. 
Published: June 2019

RESUMEN: La rapidez de secado de materiales porosos es constante hasta llegar a un valor crítico de secado (xc), en donde la rapidez del proceso disminuye conforme avanza el proceso. Este grado de avance crítico correlaciona con el tamaño medio de los poros. La determinación de xc es de utilidad para comparar la porosidad de materiales de una cierta composición química. Este nuevo enfoque de análisis de curvas de secado es mucho más simple que las determinaciones usuales de caracterización de superficies. PALABRAS CLAVE: Curvas de secado, difusibilidad de líquidos en sólidos porosos, materiales porosos, tamaño de poros.
Anfibios y reptiles asociados a tres especies de bromelias de tanque en el Parque Nacional Guanahacabibes, Cuba
Authors: García-González Alfredo , García Padrón Lázaro Yusnaviel , Delgado Fernández Freddy , Riverón-Giró Frander Brian 
Published: June 2019

RESUMEN: Se estudió la herpetofauna asociada a tres especies de bromelias de tanque en un bosque seco semideciduo sobre carso desnudo en el Parque Nacional Guanahacabibes, Cuba. Se seleccionaron 20 plantas adultas de cada una de las especies de bromelias (Tillandsia utriculata, T. fasciculata, Hohenbergia penduliflora). Determinamos las especies y altura de los árboles en los que las bromelias estaban creciendo. Removimos cada bromelia del árbol y se listaron las especies de anfibios y reptiles que se encontraron. Se calculó la abundancia relativa y el índice de dominancia de cada especie zoológica, y construimos un gráfico de diversidad. Había 34 anfibios y reptiles, de ocho especies (cinco familias). Cuatro especies son endémicas de Cuba (tres anfibios y un reptil). De las bromelias muestreadas 31,67% estaban ocupadas por herpetofauna, 67,65% de los animales se encontraban en T. utriculata. La herpetofauna tiende a preferir las bromelias a 2,31-3,20m de altura. La especie más dominante fue Eleutherodactylus varians (abundancia relativa de 55,88%). Estas bromelias de tanque pueden considerarse como especies clave, su papel es primordial en estos bosques secos semideciduos (fundamentalmente T. utriculata) y los recursos que proporcionan son esenciales para la herpetofauna, particularmente para el anuro endémico E. varians.PALABRAS CLAVE: herpetofauna, Tillandsia utriculata, Tillandsia fasciculata, Hohenbergia penduliflora, anuros, Eleutherodactylus
Maturity size and fecundity of hybrid tilapia Oreochromis aureus X Oreochromis niloticus (Perciformes: Cichlidae) from the reservoir Fernando Hiriart Balderrama “Zimapan”, Hidalgo, Mexico
Authors: Gómez-Ponce Mario Alejandro , Padill-González Claudio Manuel , López-Hernández Martin , Núñez-Nogueira Gabriel , Fernández-Bringas Laura 
Published: June 2019

Maturity size and fecundity of hybrid tilapia Oreochromis aureus X Oreochromis niloticus. (Pisces: Cichlidae) from the reservoir Fernando Hiriart Balderrama “Zimapan”, Hidalgo, Mexico were determined in organisms caught between 2007 and 2008. A total of 506 hybrid fishes were captured and showed a range of sizes from 20 to 28,9 cm standard length (SL), and total weight of 200 to 750g (Tw). The estimated maturation size for females was 20,8cm and 22cm for males, respectively. Fecundity was estimated on 50 gonads and a mean of 3 113±1 826 eggs was recorded per gravid female. Based on these results, these fishes are suitable for commercial exploitation and imply good conservation in correlation to the regulatory strategies for fisheries established in the area, at least from a reproductive point of view.
CONSCIÊNCIA SAUDÁVEL E CONFIANÇA DO CONSUMIDOR: UM ESTUDO SOBRE A APLICAÇÃO DA TEORIA DO COMPORTAMENTO PLANEJADO NA COMPRA DE ALIMENTOS ORGÂNICOS
Authors: Branco Thaíssa Velloso Castelo , Watanabe Eluiza Alberto de Morais , Alfinito Solange 
Published: June 2019

O objetivo da pesquisa foi analisar os fatores que influenciam o consumo de alimentos orgânicos, e sua relação com a intenção de compra e com o comportamento dos consumidores utilizando a Teoria do Comportamento Planejado (TCP). Especificamente, analisou-se a influência da inserção da confiança do consumidor e da consciência saudável na TCP. Foram aplicados 251 questionários junto a consumidores de frutas, legumes e hortaliças orgânicas. A análise de dados foi feita por meio da Modelagem por Equações Estruturais. Os resultados mostraram que as normas subjetivas, atitude e controle percebido influenciam diretamente a intenção de compra de orgânicos e esta, por sua vez, impacta o comportamento dos consumidores. Em contrapartida, a confiança não foi significativa no modelo de predição. Por fim, a consciência saudável impactou a intenção de compra, mas de forma pouco expressiva. A pesquisa contribui para a diminuição da lacuna de estudos brasileiros sobre o tema e analisa a inserção de mais duas dimensões ao modelo da TCP. Implicações adicionais são discutidas.
Simulasi Getaran Sistem Diskrit Satu Derajat Kebebasan
Authors: Rizky Vega Amalia Eka , Ganesha Muhammad , Sukarnoto Tono , Soeharsono Soeharsono 
Published: June 2019

<em>Equipment has been made to simulate a discrete system vibration of one degree of freedom. The aim is to obtain equipment for learning for students in the field of mechanical vibration. Vibration simulation includes free vibration and forced vibration of discrete system in one degree of freedom. The main parts of this equipment are rigid rods with mass of 2.6 kg, vibrators with mass of 3.385 kg, spring with stiffness of 3738 N/m and loading masses. A rigid rod of 0.775 m in length is supported by a hinge on one end and hung on a spring in another position. The vibrator is rotated by an electric motor and the rotation can be adjusted from 90-1600 rpm. The vibrator is mounted on a rigid object at the position of 0.285 m, 0.385 m, 0.485 m and 0.585 m from the hinge. A spring with stiffness of 3738 N/m is placed on a rigid object at the position of the hinge. The loading masses of 1.08 kg and 2.08 kg are mounted on a rigid beam in a row at the position of 0.685 m from the hinge. For the free vibration experiments, the natural frequency for each position of vibrator is searched experimentally and theoretically. It is found that the results of the two are similar. For the forced vibration experiments, graphs of vibrational responses are constructed in the frequency domain, then the resonance frequencies are compared to the natural frequency results from the free vibration experiment. Apparently the results are very close. This shows that the research equipment made is reliable and can be used as a student learning tool.</em>
Mid-term follow-up after surgical treatment of fifth metatarsal base fractures in professional soccer players
Authors: Lemos Luis Paulo Vilela , Baumfeld Tiago Soares , Macedo Benjamim Dutra , Nery Caio Augusto De Souza , Batista Jorge P. , Baumfeld Daniel Soares 
Published: June 2019

Objective: Fifth metatarsal fractures occur mainly in young athletes, with an estimated incidence of 1.8 per 1,000 people a year. The objective of this study was to evaluate the functional outcome of professional soccer players subjected to surgical treatment of fifth metatarsal base fractures. Methods: A total of 34 soccer players who underwent surgery from July 2001 to June 2016 were evaluated. All participants were evaluated by the American Orthopedic Foot and Ankle Score (AOFAS) and visual analogue scale (VAS) score before and after surgery, with a mean follow-up of 23 months. The need for grafting relative to time to surgery, time to fracture consolidation and Torg classification and graft use relative to return to sport were valuated. Results: There were 10 forwards, 7 offensive midfielders, 6 fullbacks, 5 center midfielders, 3 defenders, 2 goalkeepers and 1 defensive midfielder, with a mean age of 19 years. The mean pre- and postoperative AOFAS was 42 and 99 points whereas the mean VAS score was 6 and 0, respectively. The longer the time to surgery, the greater was the need for grafting (p=0.011). The time to return to sport was not influenced by the time to surgery, time to consolidation, Torg classification or graft use. Conclusion: The surgical treatment of fifth metatarsal base fractures in professional soccer players showed good clinical results. The return to activities after surgery is not influenced by the time to surgery, time to consolidation, Torg classification or grafting. Level of Evidence IV; Therapeutic Studies; Case Series.
Pengaruh Ekstrak Etanolik Bekatul Beras Hitam (Oryza sativa L. Cv Woja Laka) terhadap Berat Badan Tikus Putih (Rattus norvegicus Berkenhout, 1769) Diabetik
Authors: Nugroho Rahmat Budi , Binugraheni Rinda , Rukmana Rizal Maarif 
Published: June 2019

Diabetes melitus merupakan suatu penyakit metabolik dengan karakteristik hiperglikemia yang terjadi karena kelainan sekresi insulin, kerja insulin atau keduanya. Beberapa gejala dari penyakit diabet adalah: banyak minum, banyak kencing dan berat badan menurun. Tujuan dari penelitian ini adalah untuk mengetahui konsentrasi ekstrak etanolik bekatul beras hitam (Oryza sativa L. cv Woja Laka) yang paling baik dalam meningkatkan berat badan tikus putih jantan (Rattus norvegicus Berkenhout, 1769) yang menderita diabetik. Manfaat dari penelitian ini adalah memberikan informasi terkait tanaman fungsional yang dapat meningkatkan berat badan pada penderita diabetik. Metode ekstraksi bekatul beras hitam dengan maserasi. Rancangan penelitian dengan Rancangan Acak Lengkap (RAL) dengan enam perlakuan dan empat ulangan. Perlakuan terdiri dari kelompok kontrol normal, kontrol negatif, kontrol positif, 3 kelompok uji ekstrak bekatul beras hitam masing-masing dengan dosis 75 mg/200 g BB, 150 mg/200 g BB dan 225 mg/200 g BB. Semua kelompok perlakuan diinduksi aloksan kecuali kelompok kontrol normal. Ekstrak bekatul diberikan selama 21 hari terakhirmasa penelitian. Hasil penelitian menunjukkan bahwa ekstrak etanolik bekatul beras hitam mampu meningkatkan berat badan tikus putih yang menderita diabet. Kosentrasi yang paling baik untuk meningkatkan berat badan tikus putih jantanyang menderita diabet adalah 225 mg/ 200 g BB.
Investigating the Test–Retest Reliability and Validity of Hand-Held Dynamometry for Measuring Knee Strength in Older Women with Knee Osteoarthritis
Authors: Chopp-Hurley Jaclyn N. , Wiebenga Emily G. , Gatti Anthony A. , Maly Monica R. 
Published: June 2019

Purpose: Hand-held dynamometry (HHD) can be used to evaluate strength when gold-standard isokinetic dynamometry (IKD) is not feasible. HHD is useful for measuring lower limb strength in a healthy population; however, its reliability and validity in individuals with knee osteoarthritis (OA) has received little attention. In this research, we examined the test–retest reliability and validity of HHD in older women with knee OA. We also examined the associations between reliability and symptom and disease severity. Method: A total of 28 older women with knee OA completed knee extension and flexion exertions measured using HHD and IKD. Intra-class correlation coefficients (ICC2,3), standard error of measurement, and minimal detectable change were calculated. Correlation coefficients and regressions evaluated the relationships between inter-trial differences and symptom and disease severity. Results: High test–retest reliability was demonstrated for both exertions with each device (ICC2,3 = 0.83–0.96). Variance between trials was not correlated with OA symptoms. Criterion validity was good (ICC2,3 = 0.76), but extension yielded lower agreement than flexion. Regression analysis demonstrated that true strength can be predicted from HHD measurements. Conclusions: HHD is a reliable tool for capturing knee extension and flexion in individuals with OA. Because of lower agreement, HHD might be best suited for evaluating within-subject strength changes rather than true strength scores. However, gold-standard extension strength magnitudes may reasonably be predicted from regression equations ( r2 = 0.82).
Estimation of mechanical energy consumption of the drill string in rotary drilling
Authors: Chudyk I. I. , Hrydzhuk Ya. S. , Yurych L. R. 
Published: June 2019

The article is devoted to the study of dynamic phenomena in the drill string based on energy positions. Thefriction of mechanical transmissions in rotor drive, curved sections of the drill string on drill-hole walls in thedrilling mud and change in the torque on the bit are the main causes of the mechanical energy consumption in theprocess of drilling. In this case, the required engine power is used for to provide drill string rotation in the well withsome unevenness and bottom-hole deepening.
The power balance equation of the mechanical system “power drive–drill string–bottom hole” is analyzed. Theauthors have developed the problem for defining the kinetic energy of drill string in rotor drilling, which is spent onovercoming the friction in drive transmissions and drill string on drill-hole walls in the drilling mud as well as ondrilling the bottom hole. The use of the defined mathematical dependencies is demonstrated by the nomograph fordetermining the friction power in case of drill string free run in the well. The obtained results of theoreticalresearch can be used by engineering and manufacturing divisions of drilling enterprises for the engineeringestimate of energy consumption in rotary drilling.
RELACIÓN ENTRE LA CARIES Y LOS PRINCIPALES MALESTARES EXPRESADOS POR ESCOLARES DE 6 AÑOS, SAN SEBASTIÁN-CUENCA 2016
Authors: Gutierrez Pulla Karen 
Published: June 2019

OBJETIVO: El objetivo de este estudio fue relacionar la caries y su impacto en los desempeños diarios en escolares de 6 años de la Parroquia San Sebastián del cantón Cuenca en el año 2016. MATERIALES Y MÉTODOS: La metodología aplicada fue de tipo descriptiva, transversal de campo y observacional. El investigador recibió una calibración previa, se aplicó el índice ceod y una parte del instrumento CHILD-OIDP para evaluar las principales molestias expresadas por los escolares.RESULTADOS: La muestra de 197 escolares pertenecientes a 11 escuelas de la Parroquia San Sebastián fue distribuida por sexos, siendo el 45% de sexo femenino y el 55% de sexo masculino. El promedio total del índice ceod fue de 5,25 +3,60 (alto), las mujeres presentaron un promedio de ceod de 5,08 (+3,33) y los hombres de 5,39 (+3,82). Tras aplicar la condición de caries del instrumento CHILD-OIDP se encontró que el 61% de mujeres y el 52% de hombres sufrieron impactos en sus desempeños diarios. Los desempeños con mayor severidad de impacto fueron el comer con un 20,4% y el lavarse los dientes con un 17,1 %, los niños presentaron al menos un desempeño diario impactado. CONCLUSIÓN: Tras relacionar la caries y su impacto en los desempeños diarios se demostró, que los escolares afectados por caries tienen 1.72 veces más probabilidadesde presentar impactos en sus desempeños diarios y por lo tanto mayor afección en su calidad de vida que aquellos que nopresentaron esta enfermedad.