bluuebunny/crossref_metadata_2025_split huggingface dataset:
Composición factorial de una escala de autoeficacia en el cuidado de la alimentación y salud física en universitarios mexicanos
Authors: Blanco José R. , Ornelas Martha , Viciana Jesús , Rodríguez Judith M. 
Published: June 2016

Introducción: la autoeficacia es un importante factor mediador hacia cómo los individuos sienten, piensan, se motivan y se comportan. La expectativa de autoeficacia es un predictor importante de las intenciones y acciones de los individuos frente a diversas situaciones, siendo por tanto necesaria su medición. Objetivos: el presente estudio pretende indagar las propiedades psicométricas para una escala de autoeficacia en el cuidado de la alimentación y salud fisca, comprobando su estructura y su invarianza factorial. Métodos: la muestra se compuso de 1.313 estudiantes universitarios de las licenciaturas de Educación Física y Motricidad Humana que se imparten en la Universidad (omitido por anonimato), con una edad media de 20,46 años (± 1,87). La estructura factorial del cuestionario se analizó a través de análisis factoriales confirmatorios. Resultados: los análisis mostraron la adecuación de una estructura de cinco factores (ejercicio físico, cuidado de la alimentación, afrontamiento de problemas, evitación del consumo de tabaco y evitación del consumo de alcohol), mostrando adecuados índices de ajuste de fiabilidad (valores superiores a 0,85) y validez (GFI = 0,907; RMSEA = 0,053; CFI = 0,960), y explicando más del 70% de la varianza. Además, los resultados de los análisis factoriales llevados a cabo con dos submuestras indicaron fuertes evidencias de estabilidad de la estructura factorial (diferencia de CFI inferiores a 0,01). Conclusiones: la escala de autoeficacia en el cuidado de la alimentación y salud física es adecuada y puede usarse en estudios científicos. Futuras investigaciones deberían corroborar estos hallazgos.
Nutritional composition of common vegetarian food portions
Authors: Menal-Puey Susana , Morán del Ruste Manuel , Marques-Lopes Iva 
Published: June 2016

Introducción: una dieta vegetariana puede satisfacer las necesidades nutricionales si está bien planificada. En este sentido, los vegetarianos deben ser aconsejados para elegir alimentos alternativos a los productos de origen animal seleccionando el tamaño de porción adecuada de cada uno de ellos. El valor nutricional de las porciones de los alimentos vegetales tradicionales es bien conocido, sin embargo, el mercado vegetariano ofrece otros productos cuya composición química es menos conocida, ya que no son alimentos ampliamente consumidos por la población. Es necesario conocer tanto el contenido de nutrientes de las porciones de estos alimentos como la biodisponibilidad de estos nutrientes en la dieta vegetariana. Objetivos: este trabajo tiene como objetivo mejorar la información disponible sobre el aporte nutricional a la dieta de un adulto sano de las porciones de alimentos utilizados por la población vegetariana. Además, se discuten algunos puntos sobre la biodisponibilidad de los nutrientes más relevantes, y se proponen alternativas para mejorar su utilización. Métodos: los datos de composición de los alimentos veganos, por 100 g, se buscaron en bases de datos de composición de alimentos, y a partir de ellos se calculó la composición química de las porciones. Después, estos datos nutricionales se compararon con las ingestas dietéticas de referencia europeas para la población adulta, y se discutió la biodisponibilidad de los nutrientes más importantes.
Antioxidantes, especies reactivas de oxígeno y daño oxidativo asociado a la presencia de plaguicidas organoclorados en la leche materna
Authors: Castillo-Castañeda Patricia Carolina , Gaxiola-Robles Ramón , Méndez-Rodríguez Lía Celina , Labrada-Martagón Vanessa , Zenteno-Savín Tania 
Published: June 2016

Introducción: los plaguicidas organoclorados (POC) pueden incrementar la producción de especies reactivas de oxígeno (ERO). Tales efectos pueden ser contrarrestados por el sistema antioxidante, el cual se encuentra también en la leche materna. Objetivo: evaluar los indicadores de estrés oxidativo en leche materna asociados a la presencia de POC y su relación con la ingesta de alimentos marinos. Métodos: la leche materna fue colectada de 108 mujeres lactantes. Los indicadores de estrés oxidativo (actividad enzimática antioxidante, concentración de glutatión, producción de radical superóxido [O 2•- ], concentración de peroxidación de lípidos y carbonilos proteicos) se analizaron por espectrofotometría. Las concentraciones de POC se midieron por cromatografía de gases. Resultados y discusión: la producción de O 2•- no presentó relación significativa con las concentraciones de POC. Se encontraron correlaciones significativas entre las concentraciones de POC y la actividad de las enzimas antioxidantes (actividad de glutatión reductasa [GR] y concentración de aldrín [r = - 0,5], actividad de superóxido dismutasa [SOD] y concentración de α-HCH [r = 0,45]). El daño oxidativo mostró baja correlación con el contenido de POC (r < 0,30, p < 0,05). Es posible que los niveles de POC no sean suficientes para incrementar la producción de O 2•- , ya sea que el incremento en la producción de ERO se deba a especies reactivas diferentes a O 2•- o debido a que la capacidad antioxidante es suficiente para evitar el daño oxidativo en leche materna. Conclusión: los resultados de este estudio sugieren que la dieta marina no es un factor determinante en el nivel de contaminación por POC, ni en el daño oxidativo presente en leche materna.
Evolución del cobre sérico en pacientes sometidos a gastrostomía endoscópica para nutrición enteral a largo plazo
Authors: Santos Carla Adriana , Fonseca Jorge , Carolino Elisabete , Lopes Teresa , Sousa Guerreiro António 
Published: June 2016

Introducción y objetivos: el cobre (Cu) es un oligoelemento muy estudiado, pero poco se sabe de su evolución en los pacientes alimentados por gastrostomía endoscópica (GEP). Pretendemos evaluar la evolución del Cu sérico desde la gastrostomía hasta 12 semanas después de la intervención en estos pacientes alimentados con preparaciones domésticas. Métodos: realizamos un estudio observacional prospectivo para evaluar el Cu sérico, la albúmina, la transferrina y el índice de masa corporal (IMC) en el momento de la GEP, tras 4 semanas y 12 semanas después de la intervención. Los datos incluyen edad, género, NRS 2002 y enfermedad subyacente: cánceres de cabeza y cuello (CCC) y disfagia neurológica (DN). Después de la intervención, estos pacientes fueron alimentados conpreparaciones domésticas. Resultados: 146 enfermos (89 hombres), entre 21‐95 años: CCC-56, DN-90. Valores de Cu entre 42-160 μg/dl (normal: 70-140 μg/dl); normales 89% (n = 130); bajos 11% (n = 16), albúmina baja: 53% (n = 77), transferrina baja: 65% (n = 94), IMC bajo: 53% (n = 78). Después de 4 semanas: valores normales de Cu en 93% y bajos en 7%, albúmina baja en 34%, transferrina baja en 52%. Tras 12 semanas: valores normales de Cu en 95% y bajos en 5%, albúmina baja en 25%, transferrina baja en 32%. No encontramos diferencias significativas en el Cusérico cuando se compara edad, género, enfermedad subyacente, IMC, albúmina y transferrina. Conclusiones: la mayoría de los enfermos presentan Cu sérico normal en el momento de la gastrostomía. Para los enfermos con Cu sérico bajo antes del procedimiento, la alimentación con preparaciones domésticas parece suficiente para su normalización progresiva.
Efectos de la administración de calostro orofaríngeo en recién nacidos prematuros sobre los niveles de inmunoglobulina A
Authors: Martín Álvarez Estefanía , Jiménez Cabanillas María Victoria , Peña Caballero Manuela , Serrano López Laura , Kajarabille Naroa , Díaz Castro Javier , Ochoa Herrera Julio José , Maldonado Lozano José 
Published: June 2016

Introducción: el recién nacido prematuro de muy bajo peso (RNMBP) es inmunológicamente inmaduro y además presenta una alteración de las barreras naturales de defensa. Objetivo: evaluar los efectos que pueda tener la administración de calostro orofaríngeo, administrado durante los primeros 15 días posnatales, sobre los niveles de inmunoglobulina A (IgA) sérica en recién nacidos prematuros de muy bajo peso durante el primer mes de vida. Material y métodos: se desarrolló un estudio de intervención no aleatorizado con grupo control, en el que se incluyeron 38 recién nacidos con ≤ 32 + 6 semanas de gestación y/o menores de 1.500 g de peso. Los sujetos recibieron 0,2 ml de calostro de su madre cada 4 h, iniciándose el procedimiento en las primeras 24 h de vida hasta el 15.o día postnatal. Se midieron los niveles de IgA en la sangre al nacimiento, 3. er , 15.o y 30.o días de vida. Se registraron datos perinatales al nacimiento y durante el periodo de seguimiento. Resultados: IgA sérica aumentó de forma estadísticamente significativa en el grupo de intervención (M1 15,84 μg/ml, M2 20,07 μg/ml, M3 23,65 μg/ml, M4 30,34 μg/ml, p 0,001) y en el grupo control (M1 12,48 μg/ml, M2 16,48 μg/ml, p 0,018; M3 19,41 μg/ml, M4 22,48 μg/ml, p 0,001). Al mes de vida, los niveles de IgA sérica fueron significativamente mayores en el grupo de intervención que en el grupo control (p 0,026). Conclusiones: este estudio sugiere que la administración de calostro orofarínge
<p>On the proposition that technology education leaders have neglected
important qualities of industrial arts education</p>
Authors: Herschbach Dennis 
Published: June 2016

Like their historical predecessors, contemporary leaders have drawn criticism for
ideas related to changing the curriculum. But constructive criticism often sharpens the
quality of ideas, focuses the attention, and often results in superior concepts. Some
statements in recent journals have been critical of the work of some of the leaders who
have been conceptualizing and implementing technology education curriculum. This
prompted the program topic selection for the Epsilon Pi Tau International Breakfast at
the International Technology Education Association Conference on Tuesday April 2, 1996.
Breakfast attendees were well-rewarded by two distinguished speakers whose views are
published on these pages. The program was designed around a modified debate format and
each speaker took a side on the proposition that . . . leaders who have influenced
technology education curriculum development and implementation have neglected some
important and enduring qualities inherent in industrial arts education; for example, as
the qualities that resided in the conceptualizations and rationalizations of industrial
arts that related it and its students to the entire educational and social context.
JS
<p>An Exploration of Middle and High School Students’ Perceptions of Deviant
Behavior When Using Computers and the Internet</p>
Authors: Daniel Annie J. 
Published: June 2016

If the current trend continues, the use of computer technologies and the Internet
will increase for teaching and education. It is urgent that researchers study computer
and Internet deviance. The purpose of this study was to explore middle and high school
students’ perceptions of deviant behavior when using computers and the Internet.
The target population for this study was middle and high school students. The accessible
population included all students who attended a middle or high school in the East Baton
Rouge Parish School, which has computers that are capable of accessing the Internet
(1,150 students - 575 middle school students and 575 high school students).
Professor San-Yi Li of Taiwan designed the instrument used in this study. This
instrument contained 66 questions and a scantron was used to record participants’
responses. From the instrument, variables were selected from five sections - 1) students
demographic characteristics 2) computer-related activities 3) students perceptions of
deviant behavior when using computers and the Internet 4) students perception of their
peers deviant behavior when using computers and the Internet 5) students ability to use
computers and the Internet. Results showed that the majority of students indicated
they perceive their behavior as being not deviant when using computers and the Internet.
Contrarily, the students indicated they perceive the behavior of their peers to be more
deviant when using computers and the Internet. When the means of the Students Behavior
Score and the Peers Behavior Score were compared, there was a significant different
between the two scores. The Peers Behavior Score for deviance was much higher than the
Students Behavior Score.
<p>Exploring the Influence of New Technology Planning and Implementation on
the Perceptions of New Technology Effectiveness</p>
Authors: Bellamy Al 
Published: June 2016

This study explored influences that perceptions of new technology implementation
and planning processes, and dimensions of organizational climate have on perceptions of
new technology deployment effectiveness. It also examined the extent to which dimensions
of organizational climate moderates the relationships among new technology
implementation, planning, and new technology deployment effectiveness. Data for
this study was collected from 100 employees within 6 different types of organizations
that had recently installed new technology. The results of the study indicate that these
factors do indeed influence new technology deployment effectiveness. Organizational
climate was not shown to have a moderator affect.
<p>Plot Scale Factor Models for Standard Orthographic Views</p>
Authors: Osakue Edward E. 
Published: June 2016

Geometric modeling provides graphic representations of real or abstract objects.
Realistic representation requires three dimensional (3D) attributes since natural
objects have three principal dimensions. CAD software gives the user the ability to
construct realistic 3D models of objects, but often prints of these models must be
generated on two dimensional (2D) standardsized sheets. The transformation of 3D objects
into 2D representations on standard-sized sheets requires one to use a proportional
relationship called a scale, which is defined by a scale factor (SF). Two
mathematical models for a scale factor, one for reduction scaling and the other for
enlargement scaling, are presented for standard orthographic views. The models are based
on the sizes of standard drawing sheets and the principal dimensions of the object. The
application of the models is demonstrated with two illustrative examples, one for
reduction scaling and another for enlargement scaling. The scale factors selected on the
basis of the models were used to prepare detail drawings for the examples. In each case,
the scale factor appeared satisfactory. It is shown that the models are tolerant of
error in the only parameter that is assumed when applying them, suggesting that they are
robust. This robust feature is an advantage, because in real design drafting situations,
one must often make assumptions about sizes. The models can thus accommodate some
erroneous assumptions.
<p>Nanotechnology Education: Contemporary Content and
Approaches</p>
Authors: Ernst Jeremy V. 
Published: June 2016

Nanotechnology is a multidisciplinary field of research and development identified
as a major priority in the United States. Progress in science and engineering at the
nanoscale is critical for national security, prosperity of the economy, and enhancement
of the quality of life. It is anticipated that nanotechnology will be a major
transitional force that possesses the potential to change society. Rapid and continued
advancement in the field of nanotechnology is accelerating the demand for specific
professional knowledge and skill. These lines of technological discovery and improvement
continue to unlock new content for classroom incorporation. Contemporary approaches
and practices to further engage learners and enhance their abilities to apply
nanoscale-related content knowledge must be continually developed in order for the
United States to solidify itself as the primary builder of nanotechnology research and
development. Steadfast development of new technologies leading to continual
transformation of society serves as a strong indicator that current educational
practices should be altered in order to prepare knowledgeable and engaged citizens. The
use of three-dimensional graphics, virtual reality, virtual modeling, visualizations,
and other information and communication technologies can assist in reinforcing
nano-associated scientific and technological concepts.
<p>Discovering New Zealand Technology Teacher’s PCK</p>
Authors: Williams P. John , Gumbo Mishack 
Published: June 2016

An important and under-researched area of technology education is teachers’
pedagogical content knowledge (PCK). This concept reflects the notion that expert
teachers’ knowledge is a unique integration of their pedagogical technique and their
understanding of technology content as applied in a particular instance. The
authors are interested in inquiring into technology teachers’ PCK from a comparative
perspective between New Zealand and South African teachers, who have implemented and
reviewed their technology education curriculum according to a similar timeframe. This
article therefore reports on the first phase of this study on lower secondary technology
teachers’ PCK, with the focus on New Zealand. The ultimate aim is to compare the PCK of
New Zealand technology teachers and the PCK of South African technology teachers via a
case study approach. The findings in this paper are reported from the interviews,
classroom observations, and document reviews of four New Zealand technology
teachers.
<p>Nanotechnology Safety Training: Addressing the Missing
Piece</p>
Authors: Fazarro Dominick E. , Trybula Walt 
Published: June 2016

This OSHA Susan Harwood Grant addressed nanotechnology safety training for workers
and was critical for building a path for future training/education courses. The purposes
of the grant were to facilitate training and to assess the outcomes of the participants’
knowledge. Two trainers went to four sites in the United States, including one in Puerto
Rico, to conduct eight-hour courses in the Environmental, Health, and Safety (EHS)
implications of nanomaterials A survey was distributed to participants at the end
of the course to assess the quality of the course and the instructors. Overwhelmingly,
approximately 95% of the participants were satisfied with the quality of the course and
instruction. A pretest was given to the participants to assess if they knew
anything about EHS, and a posttest was administered after the training course. A
hypothesis test was used to determine the effectiveness of the content of the course. A
paired samples t-test was used to ascertain whether there was an improvement in scores
from the pretest to the posttest. The findings indicated a statistically significant
difference between the group mean scores from the pretest to the posttest. In essence,
the participants improved from the pretest to the posttest scores as a result of the
training. However, there are caution should be taken when addressing the results as the
sole indicator of the participants’ success.
Stimulation of Seawater Injectors by GLDA (Glutamic-Di Acetic Acid)
Authors: Mahmoud Mohamed , Abdelgawad K. Z. , Elkatatny S. M. , Akram A.. , Stanitzek T.. 
Published: June 2016

Summary
Seawater is injected to maintain the reservoir pressure that supports the oil production from carbonate and sandstone reservoirs. In certain regions, the seawater contains more than 4,000 ppm sulfate, and the formation contains more than 19,000 ppm calcium; this will cause calcium sulfate precipitation at the reservoir conditions. The precipitate at the reservoir conditions will be anhydrite, and it will cause formation damage that will reduce the well injectivity. Stimulation treatments are required to recover the well injectivity; this requires stopping water injection to perform the stimulation treatments, and also it requires flowing back the well after stimulation treatment.
In this study, we are proposing a new method that we can use to stimulate water injectors without stopping the water injection. The new method includes adding a chelating agent to the injected seawater at the wellhead at 15 wt% concentration. The fluid will be injected at the surface with the seawater with a specific dose to achieve the required concentration. Several solubility and coreflooding tests were performed with actual carbonate cores and GLDA (glutamic-di acetic acid) chelating agent at different temperatures. The chemical injection does not need coiled tubing and can be injected at the surface with the seawater. The chelating agents will sequester all calcium in solution and will prevent the calcium sulfate precipitation. GLDA chelating agent will be used with seawater, with no need to use treated or fresh water. Also, flowing back the well is not required because the fate of GLDA in the aquifer is soluble.
Solubility tests up to 250°F at high pressure showed that the GLDA is stable with seawater. Coreflood experiments and computed-tomography scans showed the ability of GLDA in the creation of dominant wormholes through 6- and 1.5-in. carbonate cores at 212 and 150°F, respectively. GLDA chelating agent can be used to stimulate seawater injectors without additives because this chemical is stable and mild with the well tubulars. Previous corrosion studies on GLDA showed that its corrosion rate is in the allowable range without adding corrosion inhibitors.
Advances in Understanding Wettability of Tight Oil Formations: A Montney Case Study
Authors: Habibi Ali , Dehghanpour Hassan , Binazadeh Mojtaba , Bryan Donald , Uswak Gordon 
Published: June 2016

Summary
This paper presents comprehensive rock/fluid experiments, by use of reservoir rock and fluids, to investigate wetting affinity of the Montney (MT) tight oil play in the Western Canadian Sedimentary Basin. Wettability characterization is essential for selecting optimum fracturing and treatment fluids by completion engineers and for selecting appropriate relative permeability and capillary pressure curves by reservoir engineers. Application of the conventional techniques for wettability evaluation of tight rocks is challenging primarily because of their extremely low permeability and complex pore structure. The objective of this paper is to develop an alternative laboratory protocol for evaluating the wettability of tight oil rocks reliably.
First, we conducted systematic spontaneous-imbibition tests on fresh core samples from two different wells drilled in the MT formation. We measured the air/brine, air/oil, and brine/oil contact angles for all samples. We used the end pieces of the samples to conduct scanning electron microscopy (SEM) and analysis of the elemental mapping, or energy-dispersive X-ray spectroscopy (EDS). Finally, we investigated the spontaneous imbibition of brine (or oil) into the samples partly saturated with oil (or brine). Both oil and brine spontaneously imbibe into the fresh samples, composed of quartz, carbonates (dolomite/calcite), clay minerals, feldspars, and organic matter. The results indicate that the effective pore network exhibits a mixed-wet behavior. Moreover, brine spontaneously imbibes into and forces the oil out of the oil-saturated samples, whereas oil cannot imbibe into the brine-saturated samples. This indicates that in the presence of both oil and brine, the rock affinity to brine is higher than that to oil.