bluuebunny/crossref_metadata_2025_split huggingface dataset:
Alta y baja presencia en la búsqueda de refuerzos tangibles fuera del ámbito escolar: diferencias de perfeccionismo en población ecuatoriana
Authors: García Fernández José Manuel , Ortega Sandoval Virginia Narcisa , Fernández Sogorb Aitana , Aparicio Flores María Pilar 
Published: December 2019

El perfeccionismo muestra un carácter multidimensional cuya característica principal en los sujetos que lo poseen es establecerse estándares excesivamente altos, autoevaluándose con demasiada rigurosidad. Por este motivo, los estudios que lo abordan han enfocado su conceptualización en observar la tendencia a trastornos psicopatológicos. Por otro lado, el rechazo escolar, entre otros aspectos, muestra una de las causas cuya lógica recae en la búsqueda de obtener recompensas positivas fuera del ámbito escolar. Es decir, ese rechazo se centra en la negativa a asistir al centro educativo ya que es considerado aburrido y se prefiere estar con los amigos o realizando actividades recreativas. El objetivo del siguiente trabajo fue analizar las diferencias estadísticamente significantes de perfeccionismo con estudiantes con altos y bajos niveles de la búsqueda de refuerzos tangibles fuera del ámbito escolar. Se utilizaron el Child-Adolescent Perfectionism Scale (CAPS) para evaluar el perfeccionismo, y la School Refusal Assessment Scale-Revised for Children (SRAS-R-C) para medir el rechazo escolar. La muestra de la población seleccionada alcanzó un total de 1920 alumnos de entre 1º y 3º de Bachillerato. Los resultados arrojan diferencias en los grupos con altos y bajos niveles del IV factor del SRAS-R-C, en Perfeccionismo Socialmente Prescrito (PSP), Perfeccionismo Auto Orientado Esfuerzos (PAO-E) y Perfeccionismo Auto Orientado Crítica (PAOC), observando puntuaciones más altas en PSP (d = .37), PAO-E (d = .38), y PAO-C (d = .14) en aquellos estudiantes con altos niveles de rechazo escolar frente a sus iguales con niveles más bajos de rechazo escolar. En conclusión, el presente estudio colabora con un nuevo conocimiento en el ámbito científico-educativo, e incita a seguir investigando sobre el tema, teniendo en cuenta la repercusión a nivel psicológico y académico que puede contribuir en la población juvenil ecuatoriana.
Thermodynamic features of the modifi cation of non-metallic inclusions by calcium in low-carbon steels deoxidized by aluminum
Authors: Khoroshilov A. D. , Grigorovich K. V. 
Published: December 2019

Low-carbon steels deoxidized by aluminum are the main group of structural steels produced in Russiaand all over the world. These steels work in key sectors of the economy – construction, automotive, mining and transportation of minerals, etc. The deoxidation of steel melt by aluminum leads to the formation of non-metallic inclusions, which can significantly aﬀect quality of rolled products and reduce the manufacturability of production due to overgrowth of submergednozzles during continuous casting. So, ceteris paribus, only due to contamination of steel with non-metallic inclusions, the following diﬀerences in technical and economic indicators can be observed: sorting by surface defects, reduced yield of cast slabs, increased corrosion wear rate, sorting by ultrasonic inspection defects, etc. Due to the particular shape, size and state of aggregation, non-metallic inclusions based on aluminum deoxidation products are diﬃcult to remove from the steel melt. An eﬀective way to reduce steel pollution by similar inclusions is modifying their composition to a liquid state of aggregation with calcium, which requires careful preparation of the molten slag and metal. The article describes in detail the main thermodynamic features of this process. On the example of IF-steel, we present calculation of the target range of calcium content to ensure the inclusion modification to a liquid state depending on aluminum concentration in the steel melt. The limiting sulfur concentrations in the metal melt are determined depending on aluminum and calcium contents, which ensure prevention of the formation of refractory sulfide shells on oxide non-metallic inclusions.
Оxygen solubility in melts of Ni – Co system at complex deoxidation by aluminium and silicon
Authors: Alexandrov A. A. , Dashevskii V. Ya. , Leont’ev L. I. 
Published: December 2019

Alloys of Ni – Co system are widely used in industry. Oxygen is one of the harmful impurities in these alloys; in metal it is present in dissolved form or in the form of nonmetallic inclusions. Getting the finished metal with a minimum oxygen concentration is one of the main tasks of production process of these alloys. With the complex deoxidation of the metal melt, the activity of oxides resulting from the deoxidation process is less than one, due to this, with the same content of deoxidizing elements, it is possible to obtain a metal with a lower oxygen concentration, therefore, more deeply deoxidized. At joint deoxidation with two deoxidizers, a stronger deoxidizer takes a predominant part in the reaction, however, if oxides of the deoxidizing elements form chemical compounds, it contributes to participation of a weaker deoxidizer in deoxidation process. A thermodynamic analysis of the joint influence of aluminum and silicon on the solubility of oxygen in the melts of Ni – Co system has been performed. Deoxidation reaction products may be formed as mullite (3Al2O3·2SiO2 ), and kyanite (Al2O3·SiO2 ). Presence of silicon in the melt enhances the deoxidizing ability of aluminum: insignificantly in the case of formation of compound 3Al2O3·2SiO2 and significantly in the case of formation of compound Al2O3·SiO2 . Oxygen solubility curves in the case of formation of compound Al2O3·SiO2 pass through a minimum, the position of which depends on the content of aluminum in the melt and doesn’t dependent on silicon content. Aluminum content in the minimum points is insignificantly reduced from nickel to cobalt as in the case of melts of Ni – Co–Al. Further additives of aluminum lead to an increase in oxygen concentration. Areas of compounds Al2O3 , 3Al2O3·2SiO2 , Al2O3·SiO2 and SiO2 depending on aluminum and silicon contents in the melt are determined. In melts of the Ni – Co system, the deoxidizing ability of aluminum and silicon increases with an increase in cobalt content in the melt. However, silicon enhances the deoxidizing ability of aluminum the weaker the higher cobalt content.
Generalized diagrams and equations of recrystallization of cold-deformed steel St
Authors: Belomyttsev M. Yu. 
Published: December 2019

The recrystallization processes in steel St.3 inthe ferrite state were studied. Samples with diameter of 8 mmand with height of 10 mmwere deformed by compression at 20 °Cfor 20 to 80 %, annealed at 400 – 735 °Cfor a period from 5 minutes to 10 hours, and cooled in the air. On the samples, the grain size was determined in longitudinal sections (with respect to the compression axis). After separation of the entire array of experimental data (degree of deformation ε, temperature T and time τ of annealing, grain size D) into 3 groups (no recrystallization, beginning and end of the primary recrystallization), the equations of hyperplanes best sharing these groups were found by the method of discriminant mathematical analysis. Recrystallization is not observed if the temperature is below 465 °C, or if the degree of deformation is lower than 20 % for any combination of other parameters. The deformed structure completely recrystallizes if the experimental points are in the parameter range: T > 550 °C, ε > 40 %, τ > 30 min. The largest grain refinement (up to 7 – 10 μm) was obtained after deformation with a maximum degree (80 %). The first critical (physical) degree of deformation, after which the size of the recrystallized grain is larger than the original one, is absent. The second critical (technical) degree of deformation is 25 – 35 % for temperatures of 530 – 735 °C. At such degrees grain refinement was observed in comparison with the initial deformed state. Mathematical relation between the size of the recrystallized grain and the experiments’ parameters was analyzed in two ways: according to Arrhenius in the form D=AεNτMexp (-Q/RT) , and according to Hollomon with linear temperature dependence (D ~ T). The Arrhenius solution gave the following equation: log(D) = 2,08 – 0,33log(ε) + 0,023log(τ) – 967,31 1/T. Therefore, activation energy of the recrystallization process is found to be ~18,000 J/mol. In case of the Hollomon analysis, it was proposed to use the function РН = T/1000 [СН – log(τ) + log(ε)] as the Hollomon parameter, and the Hollomon constant of CH should be found by numerical methods. For these conditions, the equation D = –21,317 – 0,034T + 0,0032log(τ) T – 0,0032log(ε)T was obtained. The accuracy of both descriptions, defined as the sum of deviations squares of the measured grain sizes from calculated, is equal to ~3,3 μm or (when normalized to an average value) ~20 %.
Characteristics of clinical manifestation of pointed condylomas in men practicing sex with men
Authors: Stoyanov V. B. , Semenova T. B. , Molochkov V. A. , Zhukov O. B. , Fominykh S. Yu. 
Published: December 2019

The study objective is to investigate the characteristics of clinical manifestation of pointed condylomas (PCs) in men practicing sex with men (MSM).Materials and methods. Eight MSM were under observation: 2 stable pairs and 4 unrelated homosexuals. Among them, 5 were between the ages of 18 and 26, 3 – between 40 and 51. In every case, men complained of nodular rash in the area of external genitals or anus. A test was performed to determine the presence of human papilloma virus (HPV) of high (16, 18, 26, 31, 33, 35, 39, 45, 51, 52, 53, 56, 58, 59, 66, 68, 71, 82) and low (6, 11, 44) cancerogenic risk.Results. In 4 patients, PCs were previously removed by destructive therapy multiple times. Remission lasted from 1 to 9 months. At the first examination, PCs on the penis were observed in all 8 patients, and in 3 PCs were also observed in the perineal area; 3 patients had PCs on the oral mucosa along with anogenital PCs. PCs appeared in the period between 3 weeks and 1.5 months prior to doctor visit. A trend towards rapid dispersion and expansion and fusion of PCs was noted by all patients. Associations of 2 HPV types were observed in 2 patients, of 3 types – in 3 patients, of 4 types – in 2 patients. HPV types of both high and low oncogenic risk were detected, but urethra, mouth and anus materials always contained DNA markers for type 6 and 11 HPV.Conclusion. MSM have the highest risk of HPV infection. All forms of homosexual sex are risk factors for HPV infection. Multicentricity and variety of proliferative skin and mucosal lesions are characteristic of the infection caused by HPV in MSM. Even in the absence of complaints, it is necessary to examine oral mucosa, tonsils and throat to rule out possible infection (including asymptomatic forms of HPV). PCs in MSM have a tendency towards rapid dissemination and growth. Type 6 and 11 HPV absolutely dominate in PCs. Meanwhile, different types of HPV in urethral, oral and anal materials can be explained both by contamination and uneven affinity of different HPV types towards epithelial cells of derma and mucosa.
Role of magnetic resonance tomography in diagnosis of genital endometriosis among women of reproductive age
Authors: Sandakova E. A. , Chistyakova D. M. , Vaganova A. F. , Rakitina Yu. V. 
Published: December 2019

Aim. To estimate the informativity of the technique of magnetic resonance tomography (MRT) of pelvic organs in diagnosis of genital endometriosis in women of reproductive age.
Materials and methods. The results of pelvic organs MRT from 415 women aged 1845 years were analyzed. The examination was implemented using the apparatus Philips Intera 1.5 Tl. The method of copying the results of MR-investigations was used to receive the data on localization, degree of dissemination of endometriosis foci and concomitant diseases of female reproductive system, which were later compared with the results of the existing echographic studies of pelvic organs.
Results. The study demonstrated higher informativity of magnetic resonance tomography in diagnosis of different forms of endometriosis and gynecological pathology associated with it, unlike echography. Out of 415 women, who underwent magnetic resonance tomography of pelvic organs, endometriosis was diagnosed in 20 % of the examined women, while echographic study only in 4 %. When implementing ultrasound, the signs of malignant neoplasms of the uterine neck and ovaries were not detected in a part of patients, whereas revealed with MRT of pelvic organs and further confirmed by the results of histological studies.
Conclusions. Application of magnetic resonance tomography permits to improve significantly diagnosis of endometriosis that is important for determination of adequate tactics of treatment, taking into account the existing concomitant gynecological pathology.
Hepatic syndromes and cytokine indices in patients with hepatic cirrhosis
Authors: Schekotova A. P. , Bulatova I. A. , Paducheva S. V. 
Published: December 2019

Aim. To analyze the clinical manifestations of hepatic cirrhosis (HC) of different etiology and their correlation with proinflammatory cytokine level interleukin-6 and tumor necrosis factor-alpha (TNF-).
Materials and methods. Fifty patients with viral hepatic cirrhosis (as a result of chronic hepatitis C), 20 patients with alcoholic HC, 16 persons with mixed etiology HC (viral and alcoholic) with the mean age 53 13.01 years were examined. Hepatic cirrhosis was diagnosed using complex data of clinicolaboratory and instrumental studies. The levels of IL-6 and TNF- were determined with the kits of VectorBest company (Russia, Novosibirsk) using the method of enzyme immunoassay and registration of results on photometer Stat-Fax 2100 (USA).
Results. No reliable differences in clinical manifestations and cytokine level in HC of different etiology were detected. The levels of cytokine concentration median significantly elevated as HC progressed. Interleukin-6 demonstrated moderate correlations with lethargy and hepatocellular insufficiency as a whole (Ki = 0.673 and Ki = 0.607, respectively).
Conclusions. Clinical syndromes of HC practically do not depend on etiology of disease. Increase in production of IL-6 and TNF-a demonstrates pathogenetic significance of proinflammatory cytokines in the lesion of the liver. IL-6 level correlates with the severity of liver lesion and, thus, objectifies clinical symptoms in HC patients, especially those based on patients complaints.
Assessment of immune status in children with functional respiratory system disorders, living in aerogenic aluminium exposure zone
Authors: Dolgikh Oleg V. , Alikina Inga N. , Guselnikov Maxim A. 
Published: December 2019

Aim. To assess the immune status in children of primary school age with functional disorders of the respiratory system, who live in the territory with location of industrial enterprise, producing aluminium.
Materials and methods. Fifty-two children aged 711 years with respiratory system disorders, who live in the zone of exposure of aluminium-producing enterprise were examined. Cellular differentiation marker CD127, protein Bcl-2 and TNFR receptor expression levels were identified using the method of flow cytometry. Phagocytic activity of the cells was studied using formalinized sheep erythrocytes; IgG content was determined with radial immunodiffusion method; beta2-microglobulin level with enzyme immunoassay. Functional status of respiratory system was assessed using spirometry, rhinomanometry methods but functional reserves with calculated Skibinskaya index.
Results. The prevalence of allergic diseases in the examined children was 2,4 times higher and allergic rhinitis was diagnosed 3,2 times more often than in the group of comparison. The prevalence of bronchial asthma, clinical signs of chronic lympho-proliferative diseases reliably exceeded the level observed in children of comparison group (29.4 %, р = 0.001). There were established the changes in immune reactivity versus the comparison group, manifested by increase in percentage of phagocyting cells, beta2-microglobulin protein, IgG, CD127, TNFR and specific IgG to aluminium by 1.1, 1.2, 1.0, 1.7, 2.5 and 1.2 times, respectively; suppression of protein
Bcl-2 expression by 2,6 times (p 0.05) was registered.
Conclusions. Among children aged 711 years, who live in the territory with localized aluminium-producing enterprise, the diseases of respiratory organs with allergic component, reliably associated with aluminium compound contamination, were diagnosed more often than in children of comparison group. Immunologic study detected imbalance between humoral and cellular components of immunity: hyperproduction of specific IgG to aluminium, excess expression of proteins and beta2-microglobulin receptors, IgG, CD127, TNFR and deficit of Bcl-2.
Conditions, determining timeliness of newborn vaccination at perinatal center
Authors: Kuznetsova O. A. , Golubkova A. A. , Bashmakova N. V. 
Published: December 2019

Aim. To assess the volume of immunopreventive work at the perinatal center.
Materials and methods. In the cohort prospective controlled study, the coverage of newborn vaccination at maternity hospitals and the reasons of parents refusals from vaccination were evaluated
Results. The specific features of vaccination of the newborns born from women with gestational diabetes mellitus and fetoplacental insufficiency were determined; sociological questioning was carried out to assess parents attitude to vaccination,
Conclusions. The results of the study showed that the process of vaccination at perinatal center has its peculiar features. Each infant needs individual approach. The role of medical personnel in formation of loyalty to vaccination is undoubtful.
Satisfacción de usuarios en hospitales públicos: experiencia del plan «Cero Colas» en Ica, Perú
Authors: Becerra-Canales Bladimir , Condori-Becerra Angela 
Published: December 2019

Con el objetivo de conocer el nivel de satisfacción de los usuarios de consultorios externos de cuatro hospitales públicos de la región Ica luego de la implementación del plan «Cero colas» se encuestó a 1067 usuarios, utilizando un instrumento que indagaba sobre las características generales, calificación del servicio y satisfacción global. Se encontró un nivel de satisfacción global «muy satisfecho/satisfecho» del 72,5% en el Hospital de Apoyo de Nazca, 70,6% en el Hospital Santa María del Socorro de Ica, 72,1% en el Hospital Regional de Ica y 73,7% en el Hospital San Juan de Dios de Pisco. Se concluye que la implementación del plan «Cero Colas» mejoró el nivel de satisfacción global, el buen trato, el cumplimiento del horario de atención médica y la claridad e información brindados por encima del estándar esperado.
Características de la neoplasia quística mucinosa del páncreas en pacientes atendidos en un hospital nacional del Perú
Authors: Revoredo-Rego Fernando , Reaño-Paredes Gustavo , De Vinatea-de Cárdenas José , Arenas-Gamio José , Villanueva-Alegre Luis , Kometter-Barrios Fritz , Tang-Sing Jorge , Uribe-León Monica , Landeo Aliaga Italo 
Published: December 2019

Con el objetivo de analizar las características clínico, patológicas y quirúrgicas de la Neoplasia Quística Mucinosa de páncreas (NQM), se realizó un análisis de los pacientes del servicio de Cirugía de Páncreas, Bazo y Retroperitoneo del Hospital Nacional Guillermo Almenara Irigoyen en Lima, Perú desde enero del 2009 hasta octubre del 2018. La presencia del estroma ovárico se usó como criterio diagnóstico de NQM. De diez pacientes con edad promedio de 47,8 años, nueve fueron mujeres, las lesiones estuvieron localizadas en el páncreas distal, el tamaño tumoral promedio fue de 88,6 mm. En todos los pacientes se realizó una pancreatectomía distal siendo tres laparoscópicas, no hubo reoperaciones ni fallecidos, dos pacientes tuvieron carcinoma invasor asociado. En conclusión, la presentación de NQM es mayor en mujeres de edad media siendo la localización en el páncreas distal y el porcentaje de malignidad bajo. La cirugía laparoscópica es una alternativa de manejo.
La migración sur/sur como un determinante social de impacto en las desigualdades e inequidades en salud bucal en Latinoamérica
Authors: Murillo-Pedrozo Andrés M. , Agudelo-Suárez Andrés A. 
Published: December 2019

Los países latinoamericanos vienen enfrentando un fenómeno social y demográfico importante conocido como migración sur/sur, que difiere del patrón clásico de migración sur/norte debido a que la capacidad de respuesta social y gubernamental es menor y por las condiciones sociales y de salud similares en ambas poblaciones (migrantes y autóctonos). La salud bucal no es ajena a esta situación y debe analizarse desde una propuesta integradora que involucra factores demográficos, sociales, económicos y aquellos propios del proceso migratorio. En el presente artículo se hace una revisión de la literatura existente en diferentes contextos geográficos, identificando los vacíos conceptuales y metodológicos, haciendo una propuesta de análisis de la migración como un determinante social con impacto en las desigualdades e inequidades en salud bucal. Esto es el punto de partida para presentar un marco conceptual explicativo desde las etapas y momentos que enfrentan los grupos de migrantes, identificando los factores que inciden en la salud bucal de esta población. En conclusión, la migración y su relación con la salud bucal en el contexto latinoamericano se encuentra en una etapa de construcción científica y esto implica la necesidad de generar propuestas de investigación basadas en la realidad social que viven los directamente involucrados y desde diferentes metodologías. De igual forma se requieren estrategias de acción en diferentes niveles y con diferentes actores desde enfoques interdisciplinarios, reconociendo la salud bucal como un derecho fundamental ligado a la salud general, para todos los ciudadanos, independiente de su procedencia.
Foreign body aspiration in children
Authors: E. Sivakumar , P. Ramasubramaniam 
Published: December 2019

Background: Foreign Body (FB) aspiration is a life-threatening problem in children. Here the demographic pattern, clinical presentation, type of Foreign Body (FB) and outcome of FB aspiration was examined.Methods: An observational case series study done in Institute of child health and research centre, Government Rajaji hospital, Madurai during November 2015 to June 2018. After a detailed history and clinical examination, children with definite evidence of FB in tracheobronchial tree were subjected to rigid bronchoscopy and with doubtful evidence were subject to FFBS. They were followed up for complications.Results: Of the 136 children, 86.03% (n=117) were under 3 years of age. A positive history of FB aspiration was present only in 51.4% (n=70). Unilateral hyperinflation was seen in 48.53% (n=66) but was normal in 13.97% (n=19). Flexible Fiber Optic Bronchoscopy (FFBS) diagnosed FBs in 61.02% (n=83) which included children with acute onset breathlessness and persistent radiological features. Peanut was the most common FB 64.71% (n=44). FBs were found in the right side in 50% (n=34) and in the left in 38.2% (n=26). 36% (n=49) developed complications due to the FBs and 2.9% (n=4) due to procedure.Conclusions: FB aspiration is most common in children less than 3 years of age. Positive history of aspiration was seen in only 51.4% and chest X-ray was normal in 13.97%. FFBS diagnosed FB in 61.02%. Peanut was the most common FB. Persistent pneumonitis is the most common complication.