bluuebunny/crossref_metadata_2025_split huggingface dataset:
Screening for Bioflocculant-Producing Bacteria from the Marine Environment of Sodwana Bay, South Africa
Authors: Ugbenyen Anthony M. , Simonis John J. , Basson Albertus K. 
Published: August 2018

Abstract
Flocculants are chemicals that mediate flocculation process, by aggregating colloids from suspension to form floc. Chemical flocculants are hazardous to the environment, which inform the search for safer and eco-friendly alternatives from microorganisms. Bacterial strains were isolated from water and sediment samples collected from Sodwana Bay, South Africa, and physiological properties of the bacterial strains were observed. Flocculation test using kaolin clay suspension was done on all isolates and the ones that showed flocculating activity were identified molecularly using 16 rRNA gene sequence analysis. Forty marine bacteria isolates were gotten from sediments and water samples collected from Sodwana Bay. Most of the isolates exhibited a range of colony pigmentation (pink, creamy, yellow, and white). After purification of individual isolates, they were screened for their potential to produce bioflocculant. The result revealed that isolates marked SOD3, SOD10, SOD12, SOD26, SOD27, SOD28, SOD32, SOD33 and SOD34 produced bioflocculants as shown by the flocculating activities from their crude extract. All these isolates showed good flocculation of kaolin clay suspension above 60% (flocculating activity) except SOD12. These bioflocculant producing isolates were identified as Pseudoalteromonas sp, Alcaligenes faecalis, Bacillus subtilis, Bacillus cereus, Bacillus stratosphericus. The results showed Sodwana Bay, South Africa as a reservoir of bacteria with potential to produce flocculants. However, further studies on the optimisation of culture conditions for bioflocculant production, extraction, characterisation and application of isolates is on the way to underscore the biotechnological importance of these microbes as producers of substitutes to harmful chemical flocculants commonly used in water and wastewater treatment.
Optimization of Prebiotics and Oxygen Scavengers for Bifidobacterium bifidum BB01 Microcapsules by Response Surface Methodology
Authors: Li Yilin , Shu Guowei , Li Yichao , Liu Yu , Song Yajuan 
Published: August 2018

Abstract
The effects of different prebiotics and oxygen scavengers on making the process of xanthan gum and chitosan (XC) Bifidobacterium bifidum BB01 microcapsules were studied by single factor experiment and Plackett-Burman screening test, ascorbic acid, sodium erythorbate and xylo-oligosaccharide had significant effects. Based on the previous studies, the process XC B. Bifidum BB01 microcapsules were further optimized by Box-Behnken model in this study. Response surface analysis showed that the best additive amoumt of ascorbic acid, sodium erythorbate and xylo-oligosaccharide were 3.0%, 2.36% and 4.99%, respectively. The viable counts of B. Bifidum BB01 microcapsules reached to 1.52×1010CFU/g from 1.25×1010 CFU/g, the encapsulation yield reached to 94.88% from 90% under the optimum conditions. It provided the research foundation for the afterward production and exploration of the process XC B. Bifidum BB01 microcapsules.
Low and high grade glioma segmentation in multispectral brain MRI data
Authors: Szilágyi László , Iclănzan David , Kapás Zoltán , Szabó Zsófia , Győrfi Ágnes , Lefkovits László 
Published: August 2018

Abstract
Several hundreds of thousand humans are diagnosed with brain cancer every year, and the majority dies within the next two years. The chances of survival could be easiest improved by early diagnosis. This is why there is a strong need for reliable algorithms that can detect the presence of gliomas in their early stage. While an automatic tumor detection algorithm can support a mass screening system, the precise segmentation of the tumor can assist medical staff at therapy planning and patient monitoring. This paper presents a random forest based procedure trained to segment gliomas in multispectral volumetric MRI records. Beside the four observed features, the proposed solution uses 100 further features extracted via morphological operations and Gabor wavelet filtering. A neighborhood-based post-processing was designed to regularize and improve the output of the classifier. The proposed algorithm was trained and tested separately with the 54 low-grade and 220 high-grade tumor volumes of the MICCAI BRATS 2016 training database. For both data sets, the achieved accuracy is characterized by an overall mean Dice score > 83%, sensitivity > 85%, and specificity > 98%. The proposed method is likely to detect all gliomas larger than 10 mL.
Optical Modeling and Simulation of Tandem Metal Oxide Solar Cells
Authors: Drăgan Florin , Nordseth Ørnulf , Fara Laurențiu , Dumitru Constantin , Crăciunescu Dan , Muscurel Vlad , Sterian Paul 
Published: August 2018

Abstract
An investigation of silicon-based tandem solar cells incorporating Al-doped ZnO (AZO) and Cu2O metal oxides, via two of the most efficient methods of optical modeling, specifically ray tracing and transfer matrix algorithms, was performed. The simulations were conducted based on specialized software, namely Silvaco Atlas and MATLAB, as well as on OPAL2 simulation platform. The optical analysis involved the calculation of the spectral curves for reflectance, absorptance and transmittance for different thicknesses of the thin film layers constituting the cell. It was established the optimum thickness of the AZO layer based on the minimum reflectance and maximum transmittance. Moreover, several materials were investigated in order to determine the optimum buffer layer for the tandem solar cell, based on optical modeling. The optical parameters of the ZnO/Cu2O top subcell were optimized, in order to achieve the highest conversion efficiency of such heterojunction solar cell.
Impact of Aerosol on the Estimation Accuracy of Solar Radiation
Authors: Delia-Gabriela Calinoiu , Marius Paulescu 
Published: August 2018

Abstract
The paper is focused on the solar irradiance estimation in clear-sky conditions and an aerosol-loaded atmosphere. Two parametric models developed by our group and three empirical models are tested. The estimates of the parametric models are based on three atmospheric parameters (ozone, nitrogen dioxide and water vapor column content) and the aerosol properties quantified by means of several specific parameters (Ångström turbidity coefficient, single scattering albedo, asymmetry factor). The empirical models contain no inputs for aerosol properties. Data collected from 10 stations were used to test the models. The inputs for the parametric models were retrieved from Aerosol Robotic Network - AERONET. Global and diffuse solar irradiance data at high-quality standards were retrieved from the Baseline Surface Radiation Network BSRN. A comparative analysis of the models’ accuracy in estimating clear-sky solar irradiance is discussed from the perspective of aerosol proprieties.
Preparation and Up-Conversion Luminescence of Yb3+/Er3+/GZO Ceramics
Authors: Li Guomin , Wang Bing , Wang Rui , Liu Huiling 
Published: August 2018

Abstract
Yb3+/Er3+/GZO ceramics have been synthesized with high temperature solid-state method. The phase and structure of the Yb3+/Er3+/GZO ceramics were characterized by X-ray diffraction (XRD). The XRD pattern that following ions Yb3+, Er3+ and Ga3+ were well doped into the ZnO lattice. Effi cient visible up-conversion (UC) red and green emission were observed under 980 nm excitation. The mechanism of the UC luminescence is investigated on the basis of the UC luminescence emission spectra, the power curve and energy level diagram. The infl uence of doping ions to the intensity ratio of red to green is analyzed and high purity of red light (red/green = 29.9) is fi nally obtained.
Acute coronary syndrome with elevation of ST associated with ergotamine abuse
Authors: Pérez Baztarrica Gabriel E. , Armijos Carrion Leonardo P. , Abarca Real Juan H. , Paredes Lima William A. , Giler Saltos Otto P. , Porcile Rafeal 
Published: August 2018

Abstract
There are few case reports of cases of carotid and aortic dissection related to the ergotamine abuse, but the cases that affect the coronary arteries is a very rare coronary. We present a patient of a 48-year-old female with an ST-segment elevation myocardial infarction attributable to chronic ergotamine use. The coronary angiography showed dissection of right coronary artery proximal.
Role of CPEC in Development of Trade, Transport and Economy of Pakistan
Authors: Rehman Ashfaq U. , Hakim Azizul , Khan Khalid , Khan Ihsan Ullah 
Published: August 2018

Abstract
The objectives of the study were to measure the efficiency in trade and transport through China Pakistan Economic Corridor (CPEC) and to ascertain efficiency in trade and economic development through developed transport infrastructures. The present study was conducted in Peshawar, Pakistan. The data was collected from the relevant developing sectors and stakeholders through CPEC including investors of Khyber Pakhtunkhwa Chamber of Commerce and Peshawar Railway Station track employees. Majority of bi-variate analysis through chi-square test result showed that there was a strong and significant association between the project of CPEC and efficiency in trade and transport in terms of economy. Similarly, a strong and significant association was found between the development of transport routes through CPEC and smooth transportation of goods and services. Furthermore, a strong and significant association was found between CPEC project and improvement in travelling potential. Similarly, a significant association was found between development in transport infrastructure and fastness and reliability in business travelling. In the same way, a significant association was found between CPEC and increase in the geographical size of the labour market. As in the chain, a strong and significant association was found between the development of transport infrastructures through CPEC and increase in labour force productivity along with an increase in the range of choice of individual and firms. This could come true that CPEC as a project would ensure smooth efficiency transportation of trade goods and services in terms of reducing time distance and cost. CPEC as a project should not be only limited to economic activities, rather it should contribute to the overall socio-economic development of the region.
Comparative Study on the Applicability of Analytical and Experimental Methods in the Analysis of the Safe Use of Rail Tankers Carrying Petroleum Products Under Pressure
Authors: Florescu Virgil , Rece Laurențiu , Mocanu Ștefan , Legendi Amelitta 
Published: August 2018

Abstract
The safety of railways has been and remains a critical topic. Whether it is infrastructure or rolling stock, the issue of safety is a permanent concern of the utmost importance, being reflected in the efficiency of any transport system.
This paper focuses on the safety in operation of pressure vessels that equip railway tanks. There are many articles and works on this subject, and it is well-known that there are both national and international regulations regarding their design, execution, operation and maintenance. Also, there are quite a few reports on the BLEVE (Boiling Liquid Expanding Vapour Explosion) phenomenon resulting in material damage and significant casualties. The BLEVE-type explosion is not considered a chemical explosion derived from a gas-air explosive environment (also present in non-flammable gases), but rather a mechanical explosion through over-pressurization.
Thus, we propose a comparative study between the results obtained using theoretical methods and those obtained as a result of tensoresistive measurements on such a tanker.
Gestores culturales: dónde están y qué hacen en las altas montañas de Veracruz. Recultivar México, Red de Cultura Viva Comunitaria
Authors: Becerra Zavala María De Lourdes 
Published: August 2018

Recultivar México, Red de Cultura Viva Comunitaria, es una iniciativa que vincula a algunos gestores de la región Córdoba-Orizaba, México, con el Observatorio de Políticas Culturales de la Universidad Veracruzana (OPC). Realizada con la propuesta metodológica de la cibercultur@, busca construir un sistema de información cultural que pueda servir para un análisis, desde abajo, de la Política Cultural. Los datos presentados corresponden a los proporcionados por los gestores que se han suscrito a Recultivar de junio a diciembre de 2017. El siguiente paso de Recultivar es fortalecer el sistema de comunicación para ampliar el sistema de información y conocimiento.Palabras clave: gestión cultural; cibercultura; política cultural; sistema de información; sistema de comunicación AbstractRecultivar México, Red de Cultu­ra Viva Comunitaria, is an initiative that links some cultural managers of the Córdoba-Ori­zaba region, with the Observatory of Cultural Policies of the Universidad Veracruzana (OPC). Carried out with the methodological proposal of the cibercultur@, aims to build a cultural in­formation system that can support an analy­sis, from below, of Cultural Policy. The data presented correspond to those provided by the cultural managers who have subscribed to Recultivar from June to December 2017. The next step of Recultivar is to strengthen the communication system to expand the informa­tion and knowledge system.Keywords: cultural management; cibercul­ture; cultural policy; communication system; knowledge system
Hacia la Construcción del Observatorio por la Equidad Territorial, de Género y Etaria en Xalapa, Veracruz, la Mirada Infantil
Authors: Mendoza Kaplan Laura 
Published: August 2018

Presentamos el avance de una investigación orientada a la creación del Observatorio para la Equidad Territorial, de Género y Etaria en Xalapa, Veracruz. Este trabajo forma parte de una red de investigaciones y proyectos desarrollados en el taller del último año de la carrera de arquitectura, con el propósito de visibilizar las desigualdades existentes entre las diferentes zonas de la ciudad y entre los grupos sociales y etarios para quienes la ciudad no es accesible de manera equitativa. Uno de esos grupos sociales en quienes no se piensa al planear y construir la ciudad, lo conforman los niños y las niñas. Es por ello que en esta ocasión nos centramos en investigar, en diversos planteles educativos de Xalapa, la percepción acerca de los barrios y escuelas que habitan, la interrelación con los compañeros y con otros grupos sociales, y la idea de ciudad que ellos imaginan.Palabras clave: infancia, hacer ciudad, equidadAbstractWe present the preliminary study of a research aimed to set up an Observatory on Territorial, Gender, and Age Equity in the city of Xalapa, Veracruz. This project belongs to a research and projects network developed around the senior year of the architecture career; this observatory will highlight the existing inequalities between the different areas of the city as well as those existing between different social or even age groups, for whom the city is not equally accessi­ble. One of these groups, which planners and city builders don’t think of, consists of boys and girls. That is why the research presented here focuses on the perception that they have about the neighborhoods and schools they inhabit, the interrelation with other children, with other so­cial groups, and the idea of the city they imagine.Keywords: childhood; city making; equity
Observatorio en Seguridad Alimentaria del Estado de Veracruz (OBSAN-UV). Actualización y análisis. Segunda parte
Authors: López Galindo Lol Ki Itzel , Álvarez Ramírez María Magdalena , Castillo Hernández Jose Luis , Morales P. Virginia , Morales Q. Amy B. 
Published: August 2018

El Observatorio en Seguridad Alimentaria y Nutricional del Estado de Veracruz es actualizado periódicamente con información oficial. Con la finalidad de conocer la realidad en Seguridad Alimentaria en Veracruz, se analizaron diversos indicadores (per cápita, sumatorias, promedios y correlaciones), encontrándose: baja producción de alimentos per cápita, alto índice de rezago social en algunos municipios, así como un aumento en la población desocupada, en los hogares con jefatura femenina, y prevalencia de malnutrición en menores de edad, también se observó un aumento en la incidencia de VIH en la población. Las infecciones respiratorias agudas en niños de 0-4 años en el periodo de 2007-2015 disminuyeron un 77%. La mayoría de los indicadores analizados nos muestran condiciones de inseguridad alimentaria y nutricional en la población del Estado de Veracruz.Palabras clave: Seguridad alimentaria; municipio; indicadores; malnutrición; correlaciones AbstractThe Observatory on Food and Nutrition Security of the State of Veracruz is periodically updated with official information. In order to know the reality in Food Security in Veracruz, several indicators were analyzed (per capita, summations, averages and correla­tions), finding: low food production per capi­ta, high rate of social lag in some municipali­ties, as well as an increase in the unoccupied population, in households headed by women, and prevalence of malnutrition in minors, an increase in the incidence of HIV in the popu­lation was also observed. Acute respiratory infections in children aged 0-4 years in the 2007-2015 period decreased by 77%. Most of the analyzed indicators show us conditions of food and nutrition insecurity in the population of the State of Veracruz.Keywords: Food security; municipality; indica­tors; malnutrition; correlations
Registro de programas de educación médica que confirman la competencia profesional de sus egresados con evaluaciones externas. México, 2017
Authors: Vázquez Martínez Francisco Domingo , Ortiz León María Cristina 
Published: August 2018

Antecedentes. Con base en el análisis de 11,854 quejas sobre los servicios de salud en México la Comisión Nacional de Derechos Humanos estableció que una de las causas más frecuentes de violación al derecho a la salud es la falta de competencia profesional del personal médico. Objetivo. Conocer los programas de educación médica que garantizan, mediante evaluaciones externas, la formación de profesionistas de la medicina competentes. Metodología. Con los resultados del Padrón de Programas de Alto Rendimiento Académico (2017) y los resultados del Examen Nacional de Aspirantes a Residencias Médicas (2017) se construye la variable Garantía externa de formación médica, con tres niveles: sobresaliente, buena y aceptable. Resultados. 28 de 112 programas educativos ofrecen una garantía externa de formación médica: 15 con un nivel bueno y 13 con uno aceptable. Conclusión. Desde la perspectiva de los derechos humanos es importante centrar los esfuerzos por mejorar la calidad de los programas de educación médica en los egresados.Palabras clave: educación médica; calidad educativa; acreditación educativa; seguimiento de egresados; derecho a la salud AbstractBackground. According to the analysis of 11,854 complaints about the Mexi­can health services, the National Commission for Human Rights was able to point out that the lack of professional competence of medical personnel is one of the most frequent causes of violation of the right to health. Objective. To get to know the medical education programs that guarantee, by external assessments, trai­ning competent medicine profesionals.Methods. The Garantía externa de formación médica (External Guarantee of Medical Trai­ning) variable with three levels, oustanding, good and acceptable, was designed considering the results from both the National Register of High Academic Performance Programs (2017) and the National Exam for Medical Interns­hips. Results. 28 educational programs out of 112 offer an external guarantee of medical training: 15 are good, while 13 are accepta­ble. Conclusion. According to a human rights viewpoint it is very important to focus on im­proving the quality of the medical programs for the graduates.Keywords: medical education; Education qua­lity; Education accreditation; Graduates fo­llow-up; Right to health
Vulnerabilidad socioambiental ante fenómenos naturales en las localidades de Texcaltitán, Tonalapan y Nacimiento de Xogapan
Authors: Sieron Katrin , Córdoba Montiel Francisco , Cervantes Pérez Juan , Amaro Rocha José Carlos 
Published: August 2018

El municipio de San Andrés Tuxtla se ubica en la costa del Golfo de México (Veracruz) y por sus condiciones climatológicas y topográficas es afectado por distintos fenómenos naturales, principalmente del tipo hidrometeorológico. También, al estar ubicado dentro de Campo Volcánico de Los Tuxtlas, existe la amenaza latente del Volcán San Martín, el cual registró su última erupción en el año de 1793. Adicionalmente, el municipio tiene alta población y altos niveles de marginal lo que incrementa la vulnerabilidad. Desde esta perspectiva, el siguiente trabajo propone la utilización de dos metodologías para obtener los niveles de vulnerabilidad y riesgo, las cuales utilizan métodos cuantitativos, fácilmente replicables y con métodos claros, lo que permitirá su empleo en trabajos futuros. El estudio se aplicó en tres localidades: Nacimiento de Xogapan, Tonalapan y Texcaltitán, obteniendo como resultado altos niveles de vulnerabilidad y peligro, por lo que se consideran necesarias medidas de mitigación.Palabras clave: Vulnerabilidad; peligro; riesgo; fenómenos naturales; Los Tuxtlas Abstract The municipality of San Andrés Tuxtla is located on the coast of the Gulf of Mexico (Veracruz) and due to its climatologi­cal and topographic conditions it is affected by different natural phenomena, mainly of hydrometeorological origin. Additionally, due to its location within the Los Tuxtlas Volcanic Field there is the latent threat of the San Mar­tin Volcano, which recorded its last eruption in the year of 1793. Further, the municipality has a high population and high levels of mar­gination, which increases the vulnerability. From this perspective, the following work pro­poses the use of two methodologies to obtain levels of vulnerability and risk, using quantita­tive methods easily replicable and with a clear methodology, which allows their use in futu­re work. The study was applied to three loca­tions: Nacimiento de Xogapan, Tonalapan and Texcaltitán, obtaining as a result high levels of vulnerability and hazard, for which mitigation measures are considered necessary.Keywords: Vulnerability; hazard; risk; Natu­ral Phenomena; Los Tuxtlas
Reactividad cutánea en conjuntivitis alérgica
Authors: Miranda-Machado Pablo Andrés , De la Cruz-Hoyos Sánchez Bautista 
Published: August 2018

Antecedentes: La conjuntivitis alérgica es producida por un mecanismo mediado por IgE o hipersensibilidad inmediata por el contacto directo del alérgeno sobre la superficie conjuntival de pacientes sensibilizados, provocando activación mastocitaria y liberación de mediadores inflamatorios. Hasta 47 % de los pacientes con conjuntivitis alérgica puede presentar sensibilización a alérgenos perennes y más de 24 %, sensibilización a varios alérgenos.Objetivo: Estimar la reactividad cutánea positiva a alérgenos en pacientes con diagnóstico de conjuntivitis alérgica en la consulta de alergología del Centro de Especialistas Santo Domingo, en Cartagena, Colombia, durante 2017.Método: Estudio transversal de 92 pacientes entre tres y 74 años, incluidos por muestreo por conveniencia.Resultados: 70.65 % presentó reactividad positiva a las pruebas cutáneas al menos a un alérgeno. Los alérgenos con reactividad cutánea positiva más frecuentes fueron los ácaros del polvo domestico (65.2 %), epitelios de animales (15.2 %), insectos (15.2 %) y alimentos (14.1 %). La rinitis alérgica (51 %), asma alérgica (23 %) y la dermatitis atópica (10 %) fueron las patologías alérgicas asociadas más frecuentes.Conclusiones: La reactividad cutánea positiva a los alérgenos estudiados fue significativamente mayor en los pacientes con conjuntivitis alérgica con otras enfermedades asociadas.