bluuebunny/crossref_metadata_2025 huggingface dataset:
The Cellular Uptake of Sensitizers Bound to Cyclodextrin Carriers
Authors: Kolářová Hana , Huf Martin , Maceček Jaroslav , Nevřelová Pavla , Tomečka Marek , Bajgar Robert , Mosinger Jiří , Strnad Miroslav
Published: November 2018

Photodynamic therapy of cancer uses the interaction of sensitizers and light to destroy cancer cells. In this study we tested the cellular uptake of meso-tetrakis(4-sulfonatophenyl)porphine (TPPS4) and its complex PdTPPS4 in the presence or absence of 2–hydroxypropyl-cyclodextrins (hpCDs) on G361 human melanoma cells. Self-fluorescence in G361 cells were measured by Perkin-Elmer LS50B luminometer equipped with well plate reader accessory. Morphological changes in cells have been evaluated using inversion fluorescent microscope Olympus IX 70 and image analysis. The uptake of the sensitizer PdTPPS4 at the given time interval from 1 to 48 hours is markedly higher than the uptake of TPPS4. The highest uptake was found for sensitizer PdTPPS4 in combination with hpβCD. TPPS4 and PdTPPS4 especially in the supramolecular complex with nontoxic cyclodextrin carriers represent efficient sensitizers for photodynamic therapy in vitro on G361 cells.
Influence of D-Glucose on Lipid Solid Support Membrane System as Attempt for Biosensing of Medically Relevant Molecules
Authors: Laputková Galina , Legiň Michal , Sabo Ján
Published: November 2018

The influence of D-glucose on a lipid solid support system with the aid of impedance spectrocopy as a preliminary attempt for the biosensing of medical relevant molecules was studied. In spite of some shortcomings, s-BLM's proved to be an appropriate model for the study of lipid membrane – D-glucose interactions. The shortcomings were the roughness of the metal support, and the lack of homogeneity in the monolayer or multilayer lipid structures.
Assessment of Cellular Damage by Comet Assay After Photodynamic Therapy in vitro
Authors: Maceček Jaroslav , Kolářová Hana , Psotová Jitka , Bajgar Robert , Huf Martin , Nevřelová Pavla , Tomečka Marek , Mosinger Jiří
Published: November 2018

The aim of this study was analysis of DNA damage in the cell line of the human melanoma G361 after photodynamic therapy (PDT) by comet assay. Photodynamic therapy is based on cytotoxic action of sensitizers (10 µM ZnTPPS4 fixed into 1 mM cyclodextrin hpβCD) and light with a suitable wavelength. Single-cell gel electrophoresis (SCGE, comet assay) is a rapid and sensitive method for detecting DNA strand breaks at the level of single cells. Great amount of DNA damage was detected with the dose of irradiation of 0.1; 0.5 J and 2.5 J.cm-2. Only radiation dose of visible light in the presence of sensitizers can induce DNA breaks of tumour cells. Cells with DNA damage appear as fluorescent comets with tails of DNA fragmentation. In contrast, cells with undamage DNA appear as round spots, because their intact DNA does not migrate out of the cell.
Report on the Course of Study BZ-1003–BR Following the Changes in Airways in Stutterers with the Help of Pulse Oscillometry (Master Screen IOS)
Authors: Pešák Josef , Grézl Tomáš , Hurtová Ludmila , Modráčková Lenka
Published: November 2018

Stuttering affects people all over the world. At the age of six years, about 1.5 percent of children suffers from stuttering. Although stuttering resolves spontaneously upon reaching adulthood in approximately 80% of those affected, it continues to have significant health and social consequences. So far, its etiology remains unknown. The organic differences in those with stuttering and those free of speech problems have been evaluated. As a result of these examinations, it has been hypothesized that stuttering results from functional pneumoobstruction of the tracheobronchial tree in the peripheral respiratory passages. As for now, no similar therapeutic procedure, using a bronchodilating agent in the treatment of stuttering, has been described. Preliminary findings of a pilot study (15,16) are surprisingly positive. In October of 2003, a multicenter open clinical trial (Stage III) to verify the effect of a sympathomimetic agent formoterol was initiated. The study is being realized in six centers in Moravia and enrolls approx. 40 patients (children, adolescents and young adults). First experience and initial evaluation of the cohort are presented here.
Stability of Bovine Cytochrome c Oxidase as Studied After Exposure to High Hydrostatic Pressure
Authors: Staničová Jana , Musatov Andrej , Robinson Neal C.
Published: November 2018

Structural and functional stability of bovine cytochrome c oxidase as a function of exposure to high hydrostatic pressure is reported. The pressure affects the stability of monomeric and dimeric enzyme quite differently. Exposure of the monomeric cytochrome c oxidase to pressures higher than 2.5 kbar causes dissociation of subunits III, VIa, VIb, VIIa with a 35–50 % decrease in electron transport activity. Dimeric enzyme is more resistant to high hydrostatic pressure since subunits III and VIIa do not dissociate and the electron transport activity loss is minimal.
Therapeutic Efficacy of Different Antidotal Mixtures Against Poisoning with GF-Agent in Mice
Authors: Bartošová Lucie , Kunešová Gabriela , Kuča Kamil , Vachek Josef
Published: November 2018

The toxicity of cyclohexyl methylphosphonofluoridate (GF-agent; cyclosarin) and therapeutic efficacy of four oximes (trimedoxime, methoxime, obidoxime and HI-6) in combination with atropine or benactyzine (BNZ) was studied in mice. The oxime therapy combined with anticholinergic drug was administered intramusculary (i.m.) 1 or 2 min after i.m. GF-agent challenge. All the drugs were applied in dose of 20% of LD50. Obidoxime and trimedoxime that were combined with atropine were less effective than methoxime and HI-6 in combination with BNZ when applied 2 minutes after GF-agent poisoning. When the drugs were administered 1 min after GF-agent challenge already, in case of methoxime, the faster application of therapy resulted in significantly higher protective ratio, while for obidoxime the therapeutic effectivity did not depend significantly on the seasonableness of therapeutic intervention. The present findings show that all four combinations of oxime with anticholinergic drug decrease the GF-agent toxicity more than twofold regardless of the time of treatment administration.
Pragmatyczne aspekty lingwistyki interkulturowej (ze szczególnym uwzględnieniem stosunków polsko-wschodniosłowiańskich)
Authors: Kiklewicz Aleksander
Published: November 2018

A cultural situation is defined as a group of individuals (usually organized groups of entities), functional systems (such as politics, science, religion, sports, the mass media, education, the military, etc.), conceptual systems (including systems of values) as well as forms in which they are manifested, and of relevant environments – ecological, economic, existential ones, etc. (i.e. the stage of events). The author presents a semiotic model of discourse which is founded on four categories: pragmatics, semantics, the form / structure of a message and the context (of a given speech act). The author shows (mainly based on the example of the Eastern European cultural area) the volatility of the relationship between these categories depending on the type of cultural situations. Separate sections describe the pragmatic parameters of a cultural situation: the intensity of the pragmatic / persuasive function as well as the degree of expressiveness, ceremoniousness, politeness and stylistic differentiation of language and the monologism vs. dialogism dichotomy.
Obraz inteligencji w parodyjnym świetle na podstawie powieści „Krokodyl” Włodzimierza Kantora
Authors: Tracz Agnieszka
Published: November 2018

This article describes a parody of the Russian intelligentsia in the 1970s. It also discusses the motif of a crocodile in Russian culture, i.e. Pomadov and Oblomov, and a longing for freedom. It also aims to show the atrocities of everyday life.
Jednostka paremiczna w europejskich i amerykańskich nurtach lingwistycznych
Authors: Szutkowski Tomasz
Published: November 2018

This article contains a review of modern paremiological trends, especially in French, Czech, Finnish, Estonian and American science centers. The author presents a synthesis of recent research studies with regard to different aspects of and problems associated with this issue.
Klasycy rosyjscy wobec konfliktu bałkańskiego 1875–1878
Authors: Żejmo Bożena
Published: November 2018

The national liberation struggle of the southern Slavic peoples in the second half of the 19th century attracted the attention of Russian society, including writers. The Slavic question and especially the Russo-Turkish War inspired both writers and journalists to reflect on the cardinal problems of the development of Russia itself. The Slavic question turned into the Russian question.
Masoński kod w twórczości Władimira Nabokowa. Próba interpretacji powieści „Zaproszenie na egzekucję” w kluczu symboliki masońskiej
Authors: Kortus Nadzieja
Published: November 2018

This article is an attempt to interpet a work by Vladimir Nabokov, Invitation to a Beheading, with the most important determinants of Masonic culture. There are few studies that discuss this outstanding prose writer in terms of freemasonry and the author of this article discusses this issue with particular attention to the symbolism  of the Masonic initiation ritual.
Małe święto jako nośnik tożsamości kulturowej w powieści „Telluria” Władimira Sorokina
Authors: Stryjakowska Anna
Published: November 2018

The article examines the category of feast in Vladimir Sorokin’s novel Теллурия. The proposed interpretation of selected parts of the novel leads to the conclusion that in postmodern conditions, the phenomenon of small feast might take on the role of a medium of cultural identity.
Radykalno-hermeneutyczne pojęcie „ekscesu” jako świętowanie codzienności. Na materiale powieści „Испуг” Władimira Makanina
Authors: Tyczko Krzysztof
Published: November 2018

This article proposes a novel interpretation for Vladimir Makanin’s Ispug, based on the findings of radical-hermeneutical philosophy. The radical-hermeneutical approach is also considered a philosophical worldview, which coincides with the attitude evoked by Makanin’s compositions. The prismatic inspection of the novel Ispug is undertaken using the category of excess.
Śladami „złotej kohorty” (Dmitrij Bykow, „Uniewinnienie”)
Authors: Zywert Aleksandra
Published: November 2018

Dmitry Bykov’s novel Justification, created within the convention of alternative history, is a story about a fruitless attempt to justify Stalin’s crimes. The work combines mythologizing and demythologizing tendencies, which makes it an interesting example of quasi-historical prose. Moreover, the novel constitutes a significant voice in the debate on Russia's present condition and prospects.
Przeszłość jako nauczycielka i żródło nadziei. Wprowadzenie do historiozofii Andrieja Sacharowa
Authors: Gołąbek Bartosz
Published: November 2018

The aim of this paper is to discuss the idea of the past based on Andrei Sakharov's essay titled Progress, Coexistence and Intellectual Freedom edited in 1968. Looking through the Stalinist era in the USSR, Sakharov concludes that without dealing with the Stalinist past, there is no hope of achieving peace, progress and stability in international affairs between the two main Cold War adversaries: USSR and USA.
Historiozofia alternatywna w prozie Wiktora Pielewina. Na przykładzie powieści „Empire V” i „Batman Apollo”
Authors: Jaworski Mateusz
Published: November 2018

The aim of the paper is an attempt to interpret Viktor Pelevin’s Empire V and Batman Apollo in the context of alternative historiosophy. The author of the article tries to interpret the notion of history within the aforementioned works by Pelevin, who perceives human history as a well-organized machine which imposes suffering on the weak.
Словарные глагольные омографы в русском языке
Authors: Kaliszan Jerzy
Published: November 2018

The author analyzes the homographic potency of Russian verbs stressed differently in their infinitive forms, such as úкать — икáть, трýсить — трусúть, срéзать — срезáть etc. In contemporary Russian there are about 350 of these pairs. They are able to create over 3,200 pairs of predicative homographs and almost 27,000 pairs of attributive (participial) homographs.
Особенности семантики гендерных фразеологизмов (на материале вос- точно- и западнославянских языков)
Authors: Kedron Katerina
Published: November 2018

This study is an attempt to show how the “gender” semantics of fixed expressions form and what the function of the gender component is in this process. An analysis of the language material shows that there are several cases of modification of “gender” semantics of idiomatic phrases: changes in the phrase’s connotation (there are distinctions between utterances with the same structure in one language or between similar cases in different languages); the change of the referent from male to female (or vice versa) or to the common human meaning etc. It is also shown that the role of the gender component is intrinsic to semantic processes.
Derywacja czasowników w rosyjskim slangu młodzieżowym na bazie angielskiego materiału leksykalnego
Authors: Kubecka Katarzyna
Published: November 2018

The article is devoted to the derivation of verbs in Russian youth slang, based on English lexical material (verbs, nouns, adjectives). By means of Russian's numerous affixes, young people form various expressive and humorous verbs, build derivational nests and create English verbs, which are homonyms of Russian words.
К проблеме аксиологической дескрипции жалости в русском языке
Authors: Николаенко Лариса
Published: November 2018

The author argues that the Russian language world-view verbalizes a dual assessment of pity. Moral assessment of pity as the soul's immediate response to someone else's suffering is positive. However, the uncomfortable and even painful process of experiencing this emotion and the high degree of intensity of its influence on one's psyche results in a negative hedonic evaluation of pity. This explains the metaphorical conceptualization of pity in images of pain, aggressive power, water element, and fire.
Konceptualizacja prawdy w świadomości językowej Polaków, Rosjan i Niemców (perspektywa aksjologiczna)
Authors: Rodziewicz Barbara
Published: November 2018

The present article is an attempt at establishing a way of understanding the term 'truth', as well as characterizing all the phenomena the term encompasses in communities of Polish, Russian and German students. The author analyses the results of a Free Word Association Test.
„…z polska — po rosyjsku”, czyli o tym, jak Polacy używają ruszczyzny
Authors: Sarnowski Michał
Published: November 2018

This article is an attempt to reflect on Poles' attitude towards the Russian language. Its aim is to reconstruct various “Polish views of Russian” in their objective dimension (with no intention to evaluate or criticise). Three stereotypical pictures of the Russian language present in the Polish common consciousness recreated by the author are based on range of language material. The description of “the three pictures of Russian in the Polish head” (“Polish common knowledge about Russian”) indicates the instrumentality of this language, which occurs in three hypostases. For the first image it is the usual instrumentality of communication (rossicum is an addition and an excess of information within a Polish text), for the second image the instrumentality acquires unambiguously pragmatic features and the rossicum becomes an instrument of effective action, and for the third picture the instrumentality of Russian elements sets in motion the symbolic-cognitive (creating a sense) function of Russian in Polish text.
Pozajęzykowe komponenty jednostki dydaktycznej
Authors: Szafernakier-Świrko Anna
Published: November 2018

In the article the author presents the non-linguistic elements of a didactic unit and demonstrates their important role in designing effective language classes. According to the author, non-linguistic elements include: the teacher’s personality, paralinguistic messages conveyed by the teacher and non-linguistic tools used by the teacher (games, realia and topic related slides).
Rosja Katarzyny II w Zapiskach Louisa Philippe’a de Ségura
Authors: Kazimierczyk-Kuncer Jolanta
Published: November 2018

The text presents deliberations on Russia by Louis Philippe de Ségur, a French diplomat, who spent almost five years in Petersburg at the court of Catherine the Great. Against the background of his intricately crafted missionary strategy, whose aim was to sign a trade treaty with Russia, Ségur draws a distinctive portrait of the tsarina and her favourite, Potiomkin, skilfully smuggling in a criticism of their reformation activities. Exposing the delusion of Russia’s civilization progress, “the country of dumb obedience and anarchy” whose nation, superficially absorbing European customs, is still plunged into slavery, he simultaneously revisits “the Russian mirage”.
Borys Pasternak wobec ideologii swoich czasów
Authors: Zbyrowski Zygmunt
Published: November 2018

Boris Pasternak avoided open ideological declarations. We usually discern his attitude and views from his works. As an active participant of the intellectual and artistic life of his times, however, Pasternak was compelled to opt for a standpoint regarding the problems faced by Russian society at the time. The poet represented a certain attitude towards such ideological issues as revolution, anti-Semitism, feminism, the role of Christianity in history, and new ideas and trends in art. Other ideologies such as ecology, Tolstoyism and Marxism, to which he attached lesser importance, should also be mentioned.
Лексика следственных действий в русском языке XI–XVII веков
Authors: Czaszczyna Elena
Published: November 2018

Investigative action is understood here as research into the circumstances of a case and establishing the truth. During the history of Russian legislation, the ways of gathering and submitting proof were changed. The article looks at the juridical lexicon of texts, which show these processes from the period of Ancient Russia to the late 17th century.
Magnitude and Nature of Gene Effects Controlling Oil Content and Quality Components in Sunflower (Helianthus Annuus L.)
Authors: Chahal Ravneet Kaur , Dhillon S. K. , Kandhola S. S. , Kaur Gurpreet , Kaila Vineeta , Tyagi Vikrant
Published: November 2018

The present research aimed to study gene effects for oil content and fatty acid composition in sunflower. It involved a set of 92 hybrids developed by crossing four CMS lines with 23 perfect restorers. Experiment was conducted at experimental field area of Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, India. The data was recorded on oil content and quality traits. The analysis of variance revealed significant differences among the traits studied. Among the lines; CMS 42A was observed to have higher significant positive gca effects for oil content, linoleic acid & linolenic acid and higher significant negative gca effects for palmitic acid and stearic acid, whereas, for oleic acid line, CMS 40A had higher positive gca effects. Among the testers, TSG 275 had higher significant positive gca effects for linolenic acid and significant negative gca effects for stearic acid. High positive gca effects for oleic acid and oil content were observed for TSG 331. The tester OPH 91 was good combiner with high positive gca effects for oleic acid and negative gca effects for palmitic acid, whereas, tester TSG 288 exhibited highest positive gca effects for linoleic acid. The best cross combinations; CMS 40A×TSG 259, CMS 607A×TSG 271 and CMS 40A×OPH 73 showed significant specific combining ability effects for oil content and cross CMS 40A×TSG 289 had significant specific combining ability for oleic acid and linoleic acid. The cross combination CMS 40A×TSG 259 is giving a significant jump of over 12 % against the current commercial check for oil percentage and for other quality traits more than 50 % over the standard check, which is significant for undertaking improvement of hybrid for oil quality.
Unterwegs mit Seehunden – Wie deren Sinnessysteme zu Orientierung, Navigation und Futtersuche beitragen
Authors: Hanke Frederike D. , Dehnhardt Guido
Published: November 2018

Robben sind in ihrem Lebensraum, den Küstenregionen und Meeren, wohlorientiert und zeigen sich als erfolgreiche Jäger. Sowohl auf ihren Wanderungen zwischen Ruheplätzen und Futtergründen als auch beim Aufspüren von Beute leisten die Sinnessysteme der Robben gute Arbeit, obwohl sich die Robben und damit ihre Sinnessysteme in ihrem Lebensraum und aufgrund ihrer amphibischen Lebensweise mit einigen Herausforderungen konfrontiert sehen. In diesem Übersichtsartikel werden die bisher vorhandenen Informationen über die Sinnessysteme der Robben und über spezifische Anpassungen der Sinne an Lebensraum und -weise im ersten Kapitel zusammengetragen und im letzten Kapitel kritisch beleuchtet. Hierbei wird der Fokus auf die Erkenntnisse gelegt, die über die Sinne des Seehunds erhalten wurden, da der Seehund durch intensive Erforschung in den letzten Jahrzehnten zum Modellorganismus innerhalb der Robben hinsichtlich der Sinnesorgane wurde. Im zweiten und dritten Kapitel werden dann die sensorischen Grundlagen in Bezug zu Orientierung, Navigation und Futtersuche gesetzt. Dies ermöglicht auch das Aufzeigen von Fragenstellungen, z. B. wie und wo die Informationen einzelner Sinne integriert werden.
Die Blut-Hirn-Schranke und ihre Rolle in der Alzheimer – Krankheit
Authors: Storck Steffen E. , Pietrzik Claus U.
Published: November 2018

Die Blut-Hirn-Schranke (BHS) wird durch die Interaktion verschiedener Zelltypen in zerebralen Gefäßen gebildet und übernimmt eine zentrale Rolle in der Homöostase des Gehirns. Als Pförtner des Zentralen Nervensystems (ZNS) kontrolliert sie ständig den Austausch von Stoffen zwischen Blut und Gehirn. In vielen neurodegenerativen Erkrankungen, wie beispielsweise der Alzheimer-Demenz (AD), weist die BHS Veränderungen auf, welche die Funktion des Gehirns stören und eine Degeneration dessen fördern. Die BHS ist somit essenziell für das gesunde Gehirn. Durch Abtransport potenziell toxischer Amyloid-beta Peptide (Aβ) reguliert die BHS die Konzentration von löslichem Aβ in der interstitiellen Flüssigkeit (ISF) des Gehirns und ist somit ein wichtiger Beseitungsmechanismus, um diese loszuwerden. In diesem Artikel sollen sowohl Aufbau als auch die physiologischen Besonderheiten der zerebralen Gefäße besprochen werden, sowie auf die pathologischen Veränderungen eingegangen werden, die bei der AD auftreten und somit die Funktion der BHS stören.
On Jordan triple (σ,τ)-higher derivation of triangular algebra
Authors: Ashraf Mohammad , Jabeen Aisha , Parveen Nazia
Published: November 2018

Let R be a commutative ring with unity, A = Tri(A,M,B) be a triangular algebra consisting of unital algebras A,B and (A,B)-bimodule M which is faithful as a left A-module and also as a right B-module. In this article,we study Jordan triple (σ,τ)-higher derivation onAand prove that every Jordan triple (σ,τ)-higher derivation on A is a (σ,τ)-higher derivation on A.
Ciudadanía, visibilidad y multiculturalismo con respecto a lo afro en Santa Marta, Caribe colombiano
Authors: Benei Véronique
Published: November 2018

En varios escritos de ciencias políticas, filosofía política, historia y antropología política, la cuestión de la visibilidad ha adquirido un lugar central dentro de los debates relativos a la ciudadanía multicultural. En estas páginas, trataré de esclarecer los procesos de construcción cultural que están en juego en el Caribe colombiano de hoy, a través del caso de Santa Marta, tomando prestado el modelo evolutivo de la ciudadanía propuesto por T.H. Marshall. En este modelo, la fase cultural resulta ser la última de una cadena de reivindicaciones hacia un reconocimiento por parte del Estado-nación. Sin embargo, este marco sigue reproduciendo y obscureciendo una primacía fenomenológica inherente a la concepción derivada de la modernidad política, en donde el sentido de la vista – y el término resultante de “visibilidad”– se ha vuelto el único modo de categorización. En este artículo, se pretende demostrar cómo el caso de la producción de una forma de ciudadanía cultural por medio de “lo afro” en la ciudad de Santa Marta, interrumpe actualmente esta cadena fenomenológico-política, y nos faculta para imaginar otras modalidades sensoriales que lleguen a ser parte integrante de una práctica ciudadana “multicultural”.
Defender Fantasía: Hacia un modelo de crítica cultural feminista
Authors: Garzón Martínez María teresa
Published: November 2018

El presente artículo tiene el objetivo de reflexionar sobre los elementos que pueden constituir un modelo de crítica cultural feminista, pensado desde la intersección entre el campo de los estudios feministas y los estudios culturales críticos, con el ánimo de abonar a la discusión sobre el “giro cultural” del feminismo en Latinoamérica. Para ello, se visitan textos clásicos de los citados campos para dar un sentido histórico y epistemológico a la propuesta y se apuesta narrativa y políticamente por un ejercicio de “fabulación”, en el cual se hace una metáfora de lo que significa “hacer trabajar la cultura”, desde posicionamientos feministas, por medio de la novela La historia sin fin (1979), de Michael Ende, argumentando que la defensa de Fantasía equivale a dotarnos de otros marcos de inteligibilidad, de otros paradigmas de pensamiento y acción, que aborden de frente la pregunta por el poder y se comprometan con proyectos de transformación social, en contextos específicos.
Arte, culto y devoción: la imagen de San José en la cultura hondureña
Authors: Flores Osorto Josué Omar
Published: November 2018

La presente investigación pretende hacer un análisis histórico sobre la figura de San José y sus diferentes manifestaciones en la cultura y sociedad hondureña, como consecuencia de su culto, creación artística y devoción popular. Este culto tiene su origen en la época colonial, específicamente en el s. XVI, con los Concilios de Trento (1545 – 1563), Nueva España (1555, 1565, 1585) y Lima, Perú (1556 y 1561), los cuales contribuyeron a expandir el evangelio desde la iconografía hasta la fundación de poblados que adoptaron esta imagen como Santo Patrón. También, se analiza esta imagen en el imaginario hondureño durante la secularización del Estado, su adopción y creación como un ideal de paternidad que simboliza protección, sustento y responsabilidad en la construcción de la organización familiar, finalizando con la vinculación de San José como patrono de la clase obrera en el siglo XX.
Las huellas de un maestro: Breve comentario a la vida y obra de Rudy Espinoza (1953-2018)
Authors: Calvo Campos Esteban Alfredo
Published: November 2018

Breve biografía y comentarios de algunas de las obras más significativas del grabador costarricense Rudy Espinoza (1953-2018), quien durante los últimos diez años de vida, amplió su legado como docente y formador a través del “Taller Nacional de Grabado” de la Escuela Casa del Artista, un espacio alternativo para la enseñanza y aprendizaje de las diferentes técnicas del grabado en todos sus aspectos.
LA FORMACIÓN DUAL DESDE LA PERSPECTIVA DEL ESTUDIANTE I CICLO 2015
Authors: Ugalde Villalobos María Eugenia , Vargas Calvo Margarita , Fonseca Hernández Julio Humberto
Published: November 2018

The Professional Secretarial Unit has a different way to teach. The second-year students have the possibility of learning and practicing at the same time. With the Dual Vocational Training Project, which consists in making a selection of some students and putting them in different companies around the Costa Rican central valley. The Project counts an some of the most important government and private companies that help with the development of the country.The students go through a learning process, In which the students pun into practice what they have learned and adquire more knowledge about the office management. because they aren’t working or doing an internship. The purpose is to acquire experience while they finish the second year of their majors (office administration or commercial education). It is very important for the Dual Vocational Training Project to stay in touch with the companies and the students results. The project contains a group of qualified professors to visit them and make the connection between the University and the company. There is also a guide supervisor in the office that has to be helping the students through the learning process.
Abundancia, biomasa y estructura de la ictiofauna demersal del mar Caribe de América Central
Authors: Benavides-Morera Rosario , Campos-Calderón Fernando
Published: November 2018

Se analizaron 96 puntos de muestreo realizados a bordo del B/O Miguel Oliver, desde el 3 de enero hasta el 3 de febrero del 2011. En cada punto se llevaron a cabo faenas de pesca de arrastre utilizando una red Lofoten. Los arrastres de 30 minutos de duración cada uno se efectuaron en 25 transectos equidistantes y divididos en estratos según la profundidad local, hasta un máximo de 1500 m. Se encontraron y analizaron un total de 142 especies de peces óseos y cartilaginosos (n = 28 074) pertenecientes a 73 familias diferentes. Se determinó la abundancia relativa, la biomasa y la frecuencia de las capturas. Antigonia combatia mostró la mayor abundancia (58,5 %), Centrophorus granulosus reportó la biomasa más representativa en el estudio (10,9 %) y Nezumia aequalis fue la especie más frecuente (32,6 %). Además, se estudió el ordenamiento espacial en posibles ensamblajes de los peces como respuesta a la profundidad. El análisis de conglomerados (Mantel test r = 0,86; p < 0,05), el de ordenamiento espacial no paramétrico (NMDS) y el de similitud (ANOSIM) suponen suficiente evidencia de que las especies se encontraron agregadas en patrones espaciales con respecto al gradiente de profundidad.
Gestión integral de los residuos de aceite vegetal de cocina en las sodas del Campus Omar Dengo de la Universidad Nacional de Costa Rica
Authors: Pino-Fan Luis , López-Cruz Kevin , Rojas-Vargas Julián , Bogantes-Sánchez Joseline
Published: November 2018

El manejo incorrecto del aceite residual puede representar afectaciones en la salud de las personas y problemas de contaminación en el ambiente. En Costa Rica, las condiciones aptas sobre calidad e inocuidad en el uso de grasas y aceites se establecen en el Reglamento para los Servicios de Alimentación al Público 37308-S, mediante criterios y buenas prácticas de fritura. Se realiza el siguiente diagnóstico sobre las características organolépticas, físicas, químicas y de gestión de los aceites de cocina residuales en cinco sodas, con la finalidad de llevar a cabo una gestión integral. La elaboración de esta gestión integral se basa en el Decreto 37308-S y el Manual de Buenas Prácticas Ambientales para los Servicios de Alimentación de la Universidad Nacional. Se encontró que en algunas sodas las prácticas de fritura son ejecutadas incorrectamente; además, existe un desconocimiento de los administradores y trabajadores de las sodas sobre las regulaciones. La mayoría de los aceites residuales presentaron compuestos polares superiores a los permitidos, las tasas de generación no coinciden con la tasa teórica, lo que indica que no se están utilizando las temperaturas óptimas para la cocción, se sobreutiliza o se entrega el aceite residual a un tercero.
Medidas topográficas en superficies atómicamente planas en condiciones ambiente mediante un microscopio de efecto túnel, un enfoque didáctico
Authors: Delgado-Jiménez Lilliana , Chacón-Vargas Sofía , Sabater-Piqueres Carlos , Sáenz-Arce Giovanni
Published: November 2018

Uno de los grandes avances en la nanotecnología fue el desarrollo del microscopio de efecto túnel, herramienta que ha permitido poder manipular átomos, moléculas, estudiar el transporte electrónico en un solo átomo e incluso la obtención de imágenes con precisión atómica en superficies eléctricamente conductoras. En este artículo describimos el microscopio de efecto túnel, su funcionamiento, una metodología de calibración y cómo medir topografía de superficies planas con una resolución atómica en condiciones ambiente. Todo ello desde un punto de vista didáctico para los nuevos usuarios o investigadores no familiarizados con la técnica. Dependiendo del tipo de medida y calibración, se usaron dos tipos de muestras conductoras, el oro orientado en la dirección cristalográfica (111) y el grafito pirolítico altamente orientado (HOPG).
Análisis cromático y espectral de lacas acrílicas para retoque de pintura automotriz blanca mediante Reconocimiento de Pautas no Supervisado
Authors: Amador-Hernández Judith , Velázquez-Manzanares Miguel , Colunga-Urbina Edith Madaí , de la Garza-Rodríguez Iliana Margarita , Sánchez-Hernández Diana Celene
Published: November 2018

En este trabajo, se caracterizó el color de lacas acrílicas blancas utilizadas para retocar pintura automotriz, mediante el espacio de color CIELab y el índice de blancura, utilizando el iluminante estándar D65 y el observador estándar a diez grados. A partir de tal información, fue posible reconocer las tendencias del color usado en este tipo de productos en el mercado nacional. Por otra parte, la aplicación de las técnicas quimiométricas de Análisis de Componentes Principales, Análisis de Grupos y Análisis Jerárquico, permitió reconocer semejanzas entre los colores observados, encontrando, entre otros, la mayor diferencia visual en la laca de blanco aperlado. Por otro lado, la laca de blanco Alaska de Mazda y la de blanco universal de Nissan fueron las más parecidas. También se concluye que el análisis cromático y el quimiométrico de datos espectrales fueron complementarios, por lo que se recomiendan ambos en el nivel de control de calidad.
Hacia un enfoque integrado de investigación micológica en Costa Rica
Authors: Rojas-Alvarado Carlos , Valverde-González Randall
Published: November 2018

Costa Rica es un país pequeño en la región centroamericana, con una reciente historia de investigación micológica. Sin embargo, algunas diferencias comparativas con otros países de la región biológica mesoamericana han promovido el estudio de los hongos y su integración con el manejo de los recursos naturales. Aun cuando todavía existe un sinnúmero de elementos por cubrir en Costa Rica, para una incorporación robusta de datos micológicos en la conservación y el desarrollo de agendas políticas sobre recursos naturales, algunas ventajas regionales han permitido que este país avance hacia tal objetivo más rápidamente que otros. Iniciativas de micoalfabetización y ciencia popular parecen ser los siguientes pasos para normalizar desequilibrios en la percepción sobre los hongos, que tienen diferentes regiones en Costa Rica, con el propósito de instar interacciones con estos organismos. No obstante, en términos generales, la sociedad costarricense parece estar más atenta al potencial de los hongos como fuente alimenticia y medicinal, al igual que a reconocer el rol de dichos organismos de facilitar servicios ecosistémicos. De esta forma, la conservación de hongos y su manejo parecen ser más fáciles de llevarse a cabo en este territorio que en otras áreas del mundo, donde mucho menos información sobre ellos ha llegado a la población general.
Isolation and evaluation of the antagonist activity of lactic acid bacteria in raw cow milk
Authors: Gutiérrez-Cortés Carolina , Suárez Hector , Buitrago Hurtado Gustavo , Díaz-Moreno Consuelo
Published: November 2018

Lactic acid bacteria (LAB) are considered as a good alternative to reduce the risk of food borne diseases in food industry. In addition to the improvement effects on the organoleptic characteristics of fermented foods from the LAB metabolites, they can inhibit the growth of microorganisms responsible of the food spoilage. This work is an advance on the biodiversity exploration of natural additives in food. Isolation, identification and screening of potential antimicrobial activity of LAB were the aims on this work. Species of Lactobacillus (Lb. casei, Lb. brevis, Lb. paracasei, and Lb. plantarum) and Pediococcus acidilactici were identified and their antagonism against Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923 and Listeria monocytogenes ATCC 7644 was demonstrated.
Yield, physicochemical quality, and antioxidant capacity of “beef” and wild tomato fruits (Solanum lycopersicum L.) as a function of the electrical conductivity of the nutrient solution
Authors: Martínez-Damían María Teresa , Cruz-Álvarez Oscar , Rodríguez-Pérez Juan Enrique , Colinas-León María Teresa , Góngora-Canto Miguel Angel
Published: November 2018

The objective of this study was to evaluate the response of three levels of electrical conductivity (2.0, 2.5 and 3.0 dS m-1) of Steiner’s nutrient solution on the yield, physicochemical quality, and antioxidant capacity of fruits from seven tomato genotypes and wild types of tomato (kidney selections). The yield, number of fruits per cluster (NFPC), average fresh fruit weight (AFWF), color, firmness, total soluble solids (TSS), total titratable acidity (TTA), vitamin C (VC), total phenols (TP), lycopene (LY) and antioxidant capacity (AC). The use of 2.5 and 3.0 dS m-1 increased the hue angle (49.05°) and TTA (0.35 and 0.36% citric acid). Among genotypes, L-51H and L-76H showed better performance (16.80 and 16.91 kg m-2, respectively), where L-28 stood out for its values of TSS, TTA, VC, TP and AC. Regarding the wild genotypes, the EC modification did not increase the yield; however, the use of 3.0 dS m-1 allowed the best results among the wild selections were SS3 (yield, AFWF and LY) and SS5 (NFPC, VC, TP and AC). The modification of the EC did not affect the yield, however, if it affected the physicochemical quality and antioxidant capacity of the analyzed materials.
The southernmost distribution of the Eastern Black-bridged Leaf Turtle, Cyclemys pulchristriata Fritz, Gaulke & Lehr, 1997 (Reptilia, Testudines, Geoemydidae), in Ba Ria–Vung Tau Province, Vietnam
Authors: Nguyen Luan Thanh , Nguyen Vu Dang Hoang , Nguyen Sang Ngoc
Published: November 2018

We report the southernmost distribution of Eastern Black-bridged Leaf Turtle Cyclemys pulchristriata Fritz, Gaulke & Lehr, 1997, in an isolated mountain in Ba Ria–Vung Tau Province, southern Vietnam based on morphological and molecular data of a wild juvenile captured in the wild. This record extends the distribution of this species about 150 km south of previous records and 600 km from its type locality.
First record of Steindachnerina insculpta (Fernández-Yépez, 1948) (Characiformes, Curimatidae) in Argentina
Authors: Aguilera Gastón , Terán Guillermo E. , Alonso Felipe , Mirande J. Marcos
Published: November 2018

Recent expeditions to northwestern Argentina revealed the presence of an unknown species of Curimatidae for the Bermejo river basin. The morphometric and meristic analyses of these specimens allow us to identify them as Steindachnerina insculpta (Fernández-Yépez, 1948), which is here reported for the first time in Argentina
Making the Match: An Innovative “Speed-Dating” Approach for Pairing Pediatric Residents with a Research Preceptor and Project
Authors: Lang Mia , Robinson Joan
Published: November 2018

This article was migrated. The article was not marked as recommended. Objectives: For residency programs with a mandatory research component, it is challenging to match residents with optimal preceptors and projects early in residency to expedite project completion. An evaluation of a "Speed Dating" format adopted in 2011 to match pediatric residents with research preceptors was performed. Methods: Residents and preceptors who participated in Speed Dating 2011 through 2016 were surveyed for their views on the process. Additionally, research output by residents with access to Speed Dating was measured, Results: Forty of 52 preceptors (77%) and 48 of 54 residents (89%) responded of which 32 preceptors and 46 residents had attended Speed Dating. Of 32 preceptors, 18 (56%) had found "a match" and 16 (50%) considered Speed Dating to be a very good strategy for matching residents with preceptors. Twenty-six of 46 residents (57%) had selected their project, preceptor or both from Speed Dating and 34 of 48 who responded to the survey (71%) preferred Speed Dating vs simply receiving a list of potential preceptors and projects. Twenty-eight residents who trained in the Speed Dating era and have completed their general pediatric training reported 30 presentations at conferences and 25 publications stemming from work completed during residency with only 3 (11%) having no presentations or publications. Conclusions: Residents tended to have a more positive attitude towards Speed Dating than did preceptors but most participants were neutral or enthusiastic about this method of matching residents with preceptors The majority of residents chose a project or preceptor or both at Speed Dating. The rate of research project completion and dissemination was high.
Effect of superplasticisers and their mechanisms of action on magnesium oxysulfate cement properties
Authors: Chen Cong , Wu Chengyou , Zhang Huifang , Chen Yuanji , Niu Jiazhen , Chen Fangyu , Yu Hongfa
Published: November 2018

To improve the workability of magnesium oxysulfate (MOS) cement with a low water/cement ratio, polycarboxylate (PC) and naphthalene (NF) superplasticisers were used as modifiers and their effects on the physical properties of MOS cement were studied. Various approaches were used to analyse and explain the action mechanisms of the superplasticisers, including zeta potential measurements, scanning electron microscopy, X-ray diffraction, hydration analysis and mercury intrusion porosimetry. The results showed that the addition of superplasticisers decreased the compressive strength and water demand of the MOS cement and also retarded the hydration process, prolonged the setting time, changed the porosity and pore distribution, and decreased the relative content of the main hydration products in the cement. In the magnesium oxide–magnesium sulfate–water system studied, the hydrophobic interaction of the NF superplasticiser in the MOS cement was stronger than that of the PC superplasticiser. NF superplasticiser thus appears to be more suitable for MOS cement, improving its fluidity without significantly reducing its compressive strength. A dosage of 0·5% NF superplasticiser was found to give the best performance.
Contribution to the geotechnical classification of municipal waste landfills in Serbia
Authors: Rakic Dragoslav , Basaric Irena , Caki Laslo , Coric Slobodan
Published: November 2018

The geotechnical classification system presented in this paper utilises municipal waste from two landfills in Serbia. Sorting and separating was performed according to the instructions outlined in the Solid Waste Analysis Tool (S.W.A.-Tool), and the composition of the municipal waste was defined based on the results. The material was grouped according to particle shape, which was identified through visual inspection. Three characteristic particle shapes were isolated: ‘three dimensional’ (bulky, compact), ‘two dimensional’ (flat, platy, flakes, foils) and ‘one dimensional’ (elongated, acicular, fibrous). The separated materials were further grouped according to the dominant influence in relation to the three most important mechanical properties (compressible – C; incompressible – IC; and with a reinforcement function – R), and the results are presented in a triangular diagram.
Grading and frequency dependence of the resilient modulus of ballast
Authors: Sun Y. , Nimbalkar S. , Chen C.
Published: November 2018

The stress–strain and degradation response of railway ballast to imparted train loading is often largely dominated by intrinsic properties, including particle size and particle-size distribution (PSD). To investigate these aspects, a series of large-scale triaxial cyclic tests were conducted on railway ballast. To investigate the influence of grading and frequency on the resilient modulus of railroad ballast, laboratory data from previous work were analysed and discussed. It was observed that the resilient modulus of ballast decreased with an increase in the coefficient of uniformity and cyclic loading frequency. However, for samples with the constant coefficient of uniformity, the resilient modulus appeared to decrease as the particle size and the associated broadness increased. It was also found that the resilient modulus underwent substantial reduction with the evolution of particle breakage by shifting the initial PSD to a broader range.
Behaviour of slender RC columns with inclination
Authors: Allouzi Rabab
Published: November 2018

In this paper, the non-linear behaviour of slender reinforced concrete (RC) columns with inclination is investigated. The available studies on inclined columns (not struts) are not sufficient in comparison with those on conventional columns and struts. The critical buckling load of inclined slender columns is derived first using second-order analysis, then three-dimensional finite-element (FE) models are created to propose a relationship to estimate the effective flexural rigidity of straight columns pushed up to buckling threshold. Finally, the buckling loads estimated using FE models of inclined columns and the proposed effective flexural rigidity are further used to evaluate the effective length factor of inclined columns at various slenderness ratios, inclination angles and boundary conditions. It is concluded that the effective flexural rigidity depends on the slenderness ratio at buckling threshold. The response of slender leaning RC columns is extensively studied and recommendations regarding effective length factor are given.
Family Background of Child Involvement in School Bullying: Impact of Psychological and Social Characteristics of the Family
Authors: Novikova M.A. , Rean A.A.
Published: November 2018

The paper defines aggression and bullying and draws a distinction between them basing on the parameters of repetition and imbalance of power. We evaluate the occurrence of both phenomena in Russia and abroad basing on recent studies and analyse how family factors can affect whether the child will be involved in bullying or not and in which position: we describe the influence of structural, functional and communicative characteristics of the family system (close/distant relationships between the family members, preferred communicative style, marital conflict, relationship with siblings, etc.) and the features of parent-child interaction. Also, we analyse the contribution of certain social factors, such as the level of family income, parental education level etc. The influence of different psychological and social characteristics of the family on the risk of the child’s victimization in school bullying is estimated for each age group (from primary schoolchildren to high school students).