bluuebunny/crossref_metadata_2025 huggingface dataset:
The Entrepreneurial Spirit: beyond business creation
Authors: Prada Ricardo
Published: February 2019

Globalization has marked this XXI century. This continual change makes organizations prepare in advance to face the challenges posed by global markets and nonstop changing times Garzón (2011). These complex challenges organizations face today are assimilated by employees through active reponses that demand the perception of the market signals they function in. Consequently, they become real and genuine entrepreneurs.  But any form of entrepreneurship also implies change and, beyond doubt, innovation. However, it is difficult to identify those employees who as entrepreneurs within organizations stand out and have an impact by generating creative projects (Pérez, 2011). This article attempts to prove how corporate entrepreneurship, within an organizational context is the true innovation booster.ResumenLa globalización ha marcado este siglo XXI. Este cambio continuo hace que las organizaciones se preparen con anticipación para enfrentar los desafíos planteados por los mercados globales y los tiempos de cambios ininterrumpidos Garzón (2011). Estos complejos desafíos que enfrentan las organizaciones hoy en día son asimilados por los empleados a través de respuestas activas que exigen la percepción de las señales de mercado en las que funcionan. En consecuencia, se convierten en verdaderos y genuinos emprendedores. Pero cualquier forma de emprendimiento también implica cambio y, sin lugar a dudas, innovación. Sin embargo, es difícil identificar a aquellos empleados que, como empresarios dentro de las organizaciones, se destacan y tienen un impacto al generar proyectos creativos (Pérez, 2011). Este artículo intenta demostrar cómo el espíritu empresarial corporativo, dentro de un contexto organizativo es el verdadero impulsor de la innovación.ResumoA globalização marcou este século XXI. Essa mudança contínua faz com que as organizações se preparem com antecedência para enfrentar os desafios colocados pelos mercados globais e os tempos de mudança ininterruptos Garzón (2011). Esses complexos desafios que as organizações enfrentam hoje são assimilados pelos funcionários por meio de respostas ativas que exigem a percepção dos sinais de mercado em que atuam. Consequentemente, tornam-se empreendedores reais e genuínos. Mas qualquer forma de empreendedorismo também implica mudança e, sem dúvida, inovação. No entanto, é difícil identificar os funcionários que, como empreendedores dentro das organizações, se destacam e têm impacto gerando projetos criativos (Pérez, 2011). Este artigo tenta provar como o empreendedorismo corporativo, dentro de um contexto organizacional, é o verdadeiro impulsionador da inovação.
Internal Marketing: A Model for Implementation and Development
Authors: Bohnenberger Maria Cristina , Schmidt Serje , Damacena Cláudio , Batle Lorente Francisco Julio
Published: February 2019

Internal marketing (IM) is increasingly recognized as a tool to institutionalize organizational values, improve employee commitment and enhance customer satisfaction. Its implementation and development have not been sufficiently supported by the literature. A theoretical model would contribute to its conceptual development and facilitate its application in the organization, enabling to achieve strategic objectives such as customer orientation, organizational commitment, and organization performance. This paper proposes a theoretical model for implementing and developing IM in organizations. It identifies the evolution and the different theoretical approaches, such as: (a) the employee as a customer of the organization; (b) IM as a process; and (c) the culture of external customer orientation. The proposed model considers IM as a path for performing the strategic management of human resources through the marketing perspective.ResumenEl marketing interno (IM) se reconoce cada vez más como una herramienta para institucionalizar los valores de la organización, mejorar el compromiso de los empleados y mejorar la satisfacción del cliente. Su implementación y desarrollo no han sido suficientemente respaldados por la literatura. Un modelo teórico contribuiría a su desarrollo conceptual y facilitaría su aplicación en la organización, permitiéndole alcanzar objetivos estratégicos tales como la orientación al cliente, el compromiso organizacional y el desempeño de la organización. Este artículo propone un modelo teórico para implementar y desarrollar IM en organizaciones. Identifica la evolución y los diferentes enfoques teóricos, tales como: (a) el empleado como cliente de la organización; (b) IM como un proceso; y (c) la cultura de la orientación al cliente externo. El modelo propuesto considera la mensajería instantánea como un camino para realizar la gestión estratégica de los recursos humanos a través de la perspectiva de comercialización.ResumoO marketing interno (MI) é cada vez mais reconhecido como uma ferramenta para institucionalizar os valores organizacionais, melhorar o comprometimento dos funcionários e aumentar a satisfação do cliente. Sua implementação e desenvolvimento não foram suportados pela literatura. Um modelo teórico contribuiria para o seu desenvolvimento conceitual e facilitaria sua aplicação na organização, possibilitando atingir objetivos estratégicos como orientação ao cliente, comprometimento organizacional e desempenho organizacional. Este artigo reflexivo propõe um modelo teórico para implementar e desenvolver IM nas organizações. Identifica a evolução e as diferentes abordagens teóricas, tais como: (a) o empregado como cliente da organização; (b) IM como um processo; e (c) a cultura de orientação externa ao cliente. As considerações do modelo proposto IM como caminho para a realização da gestão estratégica de recursos humanos através da perspectiva de marketing.
Koncepcje identyfikowania i tworzenia źródeł przewagi konkurencyjnej w łańcuchu wartości przedsiębiorstwa
Authors: Walas-Trębacz Jolanta
Published: February 2019

The article emphasises that an enterprise’s management can identify sources of competitive advantage in the market to help it effectively shape its value chain structure. In order to identify these sources and focus on the relevant processes that create value added for the customer and other stakeholders, management should evaluate the effectiveness of the existing value chain. To that end, an important task is to identify the most valuable sources contributing to competitive advantage in the existing value chain. To configure an enterprise’s value chain so that it reaches the highest added value, management should take into account, in choosing a model and structure, concepts that are subject to numerous changes over time.The article focuses mainly on presenting the classification and review of selected concepts that allow management to set the directions it will follow to improve the enterprise value chain, primarily from the point of view of the capabilities needed to effectively develop and maintain key sources of competitive advantage. In addition, one group of concepts included in a classification – resource-based competitive advantages – is presented in greater detail. At present, they are still an important inspiration for business managers in improving the structure of the value chain.
Comparison of the association of brachial arterial pressure and parameters of central aortic pressure with left ventricular hypertrophy in the general population of Novosibirsk
Authors: Tsvetkova E. E. , Kuznetsov A. A. , Denisova D. V. , Ragino Yu. I. , Voevoda M. I.
Published: February 2019

Aim.There is evidence that central aortic blood pressure (BP) is more associated with left ventricular myocardial hypertrophy than brachial BP. The purpose of this work is to compare the association of brachial and central aortic BP with electrocardiographic parameters of left ventricular hypertrophy in the general population of Novosibirsk.

Material and methods. We examined 327 people: 155 men and 172 women aged 25-44 years from a representative sample from the general population of Novosibirsk. The study program included anthropometry, BP measurement, electrocardiography, biochemical blood analysis. Radial artery applanation tonometry and pulse wave analysis were performed using the SphygmoCor system. Left ventricular hypertrophy was determined by electrocardiographic parameters.

Results.In the general population of Novosibirsk, central aortic BP is more associated with left ventricular myocardial hypertrophy than brachial BP. Central pulse pressure, in contrast to brachial BP, is significantly associated with the R+S index (p=0,0085), as well as RI (p=0,0038) and RaVL (p=0,0039) wave amplitude. Central systolic aortic BP, in contrast to brachial systolic BP, is significantly associated with RI (p=0,042) and RaVL (p=0,029) wave amplitudes. Amplification parameters of central aortic BP, regardless of brachial BP, are associated with indices of left ventricular hypertrophy. Pulse pressure amplification in groups with or without left ventricular hypertrophy, standardized for age, gender, height, waist circumference, heart rate, triglyceride levels, high density lipoprotein cholesterol, low density lipoprotein cholesterol, blood glucose, and brachial pulse pressure, was 13,3 mm Hg and 12,5 mm Hg, respectively (p=0,035).

Conclusion.The results of this study substantiate the relevance of the practical use of central aortic BP parameters in addition to the office measurement of brachial BP.
Novel biomarkers of kidney injury and fibrosis in patients with different severity of hypertension: relation to vascular reactivity and stiffness
Authors: Mironova S. A. , Yudina Yu. S. , Ionov M. A. , Avdonina N. G. , Emelyanov I. V. , Vasil`eva E. Yu. , Kitaeva E. A. , Zvartau N. E. , Konradi A. O.
Published: February 2019

Aim. To compare the relationships between conventional and new potentially more early investigational biomarkers (urine and ultrasound) of kidney injury and central aortic blood pressure, vascular stiffness and reactivity, endothelial dysfunction in patients with different severity of hypertension.Material and methods. Urine levels NGAL, KIM-1, L-FABP, albuminuria and serum levels of сystatin C and creatinine were measured in 92 hypertensive patients with mild and severe hypertension, 46 male (mean age 50,7±12,2 years). Glomerular filtration rate was estimated by the level of serum creatinine and cystatin C by MDRD and CKD-EPI formulas. Instrumental examination included measuring office blood pressure, 24-hour ambulatory blood pressure monitoring (SpaceLabs 90207), applanation tonometry (SphygmoCor, Artcor Medical) with the calculation of central aortic blood pressure, pulse wave velocity and augmentation index and Doppler ultrasonography with assessment of intraparenchymal renal arterial resistance indices — resistive index and pulsatility index (Vivid 7 dimension). Endothelial function was assessed by reactive hyperemia index with EndoPAT device (Itamar Medicals).Results. There were no differences in conventional levels of biomarkers between patients, however, cystatin C level increased and serum cystatin C estimated GFR and serum creatinine and cystatin C estimated GFR (CKD EPI formula) (sCr,Cys-estimated GFR) levels decreased with the severity of hypertension. These novel biomarkers were associated with increased central aortic blood pressure, arterial stiffness and intraparenchymal renal arterial resistance indices. Decreased sCr,Cys-estimated GFR levels were associated with lower reactive hyperemia index. There were no differences in NGAL, KIM-1 and L-FABP levels in patients with hypertension. However, NGAL levels were associated with increased augmentation index, resistive index in intralobular and pulsatility index in arcuate arteries, KIM-1 and L-FABP levels were associated with increased systolic and diastolic central aortic blood pressure, pulse wave velocity only in patients with severe and resistant hypertension.Conclusion. Serum cystatin C, NGAL, KIM-1 and L-FABP levels seem to be biomarkers of increased systemic and intrarenal vascular stiffness in patients with different severity of hypertension.
Effectiveness of in insulin resistance correction and the adipokines level reduction in patients with arterial hypertension in comparison with other ARBs
Authors: Nedogoda S. V. , Chumachek E. V. , Tsoma V. V. , Salasyuk A. S. , Smirnova V. O. , Popova E. A.
Published: February 2019

Aim. To assess the possibility of azilsartan medoxomil to achieve target blood pressure (BP) (less than 130/80 mm Hg), to study angioprotective features and reduction of adipokines levels and inflammatory markers in patients with hypertension and previous therapy with other ARBs.

Material and methods. In open observational study with 24 weeks follow-up were included 60 patients with previous therapy (losartan or valsartan or telmisartan).

All patients underwent ambulatory BP monitoring, applanation tonometry (determination of the augmentation index and central BP), measurement of the pulse wave velocity, laboratory tests (lipid profile, uric acid, fasting glucose, Homeostasis Model Assessment, homocysteine, leptin, adiponectin, highly sensitive C-reactive protein, tumor necrosis factor alpha, interleukin-6).

Results. Azilsartan provided the systolic BP (29,05%, 22,5% and 8,9%) and diastolic BP reduction 18,82%, 20,46% and 8,54% (p<0,05) in patients previously treated with losartan, valsartan or telmisartan, respectively. Central systolic BP (by 25,95%, 8,78%, 11,94%), central pulse BP (by 40%, 18,38% and 19,6%), augmentation index (by 28,87%, 20,69% and 14,29%) and pulse wave velocity (by 21,57%, 24,56% and 24,92%) were decreased (p<0,05). There were positive changes in leptin, C-reactive protein, IL-6, adiponectin levels in all patients with losartan, valsartan or telmisartan initial therapy (p<0,05).

Conclusion. Azilsartan medoxomil has advantages in BP control, the arterial elasticity improving, reducing of insulin-resistance and inflammation.
A new subterranean species of Phreatobius Goeldi, 1905 (Siluriformes, Incertae sedis) from the Southwestern Amazon basin
Authors: Shibatta Oscar Akio , Muriel-Cunha Janice , Pinna Mário C.C. de
Published: February 2019

A new species of the previously monotypic catfish genus Phreatobius is described from an artificial well in the village of Rio Pardo, located 90 km south of the city of Porto Velho, State of Rondônia, Brazil, in the drainage area of the Rio Branco (Rio Madeira system, Amazon basin). Phreatobius dracunculus n. sp. differs from its only congener, P. cisternarum, by the absence of eyes (vs. present), the lack of dark integumentary pigmentation (vs. faint dark pigment always present), the presence of five pectoral-fin rays (vs. four), ventral procurrent rays 11-13 (vs. 22 to 26), dorsal procurrent rays 29-31 (vs. 42 to 50), fewer vertebrae (52 or 53 vs. 59 to 64) and the larger pseudotympanus. The new species shows all diagnostic characters so far proposed for Phreatobius, including an unusual red coloration in life. The localities of the two species of Phreatobius are approximately 1900 km apart. That, in association with their peculiar and mostly inaccessible habitats, indicates that the genus may be widely distributed in the Amazon basin.
A assembléia de abelhas (Hymenoptera, Apidae) de uma área restrita de campos naturais do Parque Estadual de Vila Velha, Paraná e comparações com áreas de campos e cerrado
Authors: Gonçalves Rodrigo B. , Melo Gabriel A.R. , Aguiar Antonio J.C.
Published: February 2019

A assembléia de abelhas (Hymenoptera, Apidae) de uma área restrita de campos naturais do Parque Estadual de Vila Velha, Paraná e comparações com áreas de campos e cerrado. Foram realizadas coletas sistemáticas de abelhas em uma área restrita no Parque Estadual de Vila Velha, Paraná, no período de outubro de 2003 a setembro de 2004. Essa amostragem visou gerar subsídios para comparações entre áreas de campo dentro do Parque e com outras áreas de vegetação aberta brasileiras. A área de estudo possui cerca de quatro hectares e foi subdividida em quatro subáreas contínuas e com o mesmo perímetro. As abelhas em flores e em vôo foram capturadas com auxílio de rede entomológica. Foram coletados 1.459 espécimes pertencentes a 122 espécies de abelhas. Estas espécies estão distribuídas em 51 gêneros, 20 tribos e cinco subfamílias. As plantas visitadas correspondem a 93 espécies, pertencentes a 62 gêneros e 29 famílias. Neste estudo e em outro estudo realizado anteriormente em outra área do Parque foram coletadas 222 espécies sendo 74 espécies em comum as duas áreas e uma soma de 148 espécies restritas a uma ou outra área. Ainda, registros históricos de abelhas para Vila Velha elevam a riqueza conhecida para 261 espécies. O índice de similaridade de Morisita entre as áreas foi de 0,50 quando utilizadas as plantas como variáveis e 0,88 quando utilizados gêneros e espécies de abelhas, revelando uma notável heterogeneidade. Comparações entre as áreas do Parque Estadual de Vila Velha e áreas de campos e cerrado foram realizadas através do índice de similaridade e da análise de correspondência. Foram observados dois agrupamentos fortemente evidentes, referentes aos campos e ao cerrado. A análise de correspondência sugere que alguns gêneros podem ser relacionados a determinadas formações vegetais. Esse estudo indica que a fauna de abelhas de Vila Velha é composta principalmente por gêneros relacionados às áreas de campos, porém com presença de elementos de cerrado.
Osteologia craniana de Nyctibiidae (Aves, Caprimulgiformes)
Authors: Costa Thiago Vernaschi Vieira da , Donatelli Reginaldo José
Published: February 2019

A família Nyctibiidae (urutaus) apresenta sete espécies incluídas em um único gênero Nyctibius, distribuídas por toda a região neotropical desde o México até a Argentina, alcançando sua maior diversidade na região amazônica. São aves de hábito noturno caracterizadas por um distintivo mimetismo em troncos vegetais, onde permanecem imóveis durante o período diurno. Devido seus hábitos noturnos e comportamentos crípticos, o estudo de seus hábitos de vida é excessivamente difícil, o que faz desse grupo um dos menos conhecidos da região tropical. Logo, informações sobre comportamento e história natural da família são muito escassas, e raras são as contribuições a respeito de sua anatomia. O objetivo do presente trabalho foi descrever detalhadamente a osteologia craniana de seis das sete espécies de Nyctibiidae reconhecidas, incluindo Nyctibius griseus, N. grandis, N. aethereus, N. jamaicensis, N. leucopterus e N. bracteatus. Observa-se uma grande variação na osteologia craniana dentro da família, a qual apresenta um crânio bastante modificado e adaptado aos seus hábitos de vida, basicamente no que se refere a abrigar os olhos extremamente desenvolvidos e a proporcionar uma grande abertura bucal. Os ossos que formam o teto da cavidade bucal apresentam um achatamento dorso-ventral, particularmente nos ossos pterigóide e paraesfenóide, e o osso palatino é muito desenvolvido lateralmente. Na região de fusão da maxila com o arco jugal observa-se uma projeção, única entre as aves, a qual é vista até externamente com a ave em vida. O osso vômer tem grande variação dentro da família, apresentando um número variável de projeções rostrais entre as espécies. A região caudal do crânio é bastante larga, havendo grande distância entre os ossos quadrados, os quais são verticalmente posicionados e apresentam um reduzido processo orbital. A mandíbula, elástica e flexível, apresenta uma curta região sinfisiária e articulações sindesmóticas na região mediana dos ramos mandibulares. De forma geral, os Nyctibiidae apresentam um crânio bastante especializado, sendo possível muitas vezes estabelecer relação entre a forma das estruturas e os hábitos de vida das espécies. Mais ainda, a grande variação interespecífica no crânio observada ressalta a necessidade de uma revisão taxonômica das espécies, atualmente incluídas em um único gênero.
Variación geográfica de Ninia atrata en Colombia (Colubridae: Dipsadinae)
Authors: Angarita-Sierra Teddy G.
Published: February 2019

Se describe la variación y distribución geográfica de Ninia atrata en Colombia basada en 128 ejemplares de mas de 24 localidades. Los ejemplares colombianos presentan un alto grado de polimorfismo en su coloración, mostrando una clara diferencia entre las poblaciones Cis-andinas y Trans-andinas, tanto en coloración del collar nucal, como en su forma, prominencia y en siete de doce proporciones morfométricas. Lavariación encontrada e nestas poblaciones colombianas sugiere una relevancia taxonómica. Sin embargo, teniendo en cuenta el tipo de datos disponibles hasta el momento, lo más prudente es conjeturar que Ninia atrata posee en Colombia una gran variación intraespecífica y dos formas fenotípicas distinguibles.
Snakes of the genus Oxyrhopus (Colubridae: Squamata) in Colombia: taxonomy and geographic variation
Authors: Lynch John D.
Published: February 2019

Four species of Oxyrhopus occur in Colombia, one (O. leucomelas) of which is Andean and the other three occur in lowlands. No geographic variation was detected in O. occipitalis but there is marked geographic variation in color pattern and scutellation for the widely distributed O. petola. Recognition of subspecies within O. petola is possible but appears to obscure more than it illuminates. The snake previously reported as O. melanogenys or O. aff. melanogenys is diagnosed as a previously unrecognized species.
Ecology of a snake assemblage in the Atlantic Forest of southeastern Brazil
Authors: Hartmann Paulo A. , Hartmann Marília T. , Martins Marcio
Published: February 2019

The main objective of this study was to examine the natural history and the ecology of the species that constitute a snake assemblage in the Atlantic Rainforest, at Núcleo Picinguaba, Parque Estadual da Serra do Mar, located on the northern coast of the state of São Paulo, southeastern Brazil. The main aspects studied were: richness, relative abundance, daily and seasonal activity, and substrate use. We also provide additional information on natural history of the snakes. A total of 282 snakes, distributed over 24 species, belonging to 16 genera and four families, has been found within the area of the Núcleo Picinguaba. Species sampled more frequently were Bothrops jararaca and B. jararacussu. The methods that yielded the best results were time constrained search and opportunistic encounters. Among the abiotic factors analyzed, minimum temperature, followed by the mean temperature and the rainfall are apparently the most important in determining snake abundance. Most species presented a diet concentrated on one prey category or restricted to a few kinds of food items. The large number of species that feed on frogs points out the importance of this kind of prey as an important food resource for snakes in the Atlantic Rainforest. Our results indicate that the structure of the Picinguaba snake assemblage reflects mainly the phylogenetic constraints of each of its lineages.
The genus Oxyrhopus (Serpentes: Dipsadidae: Xenodontinae) in Guyana: morphology, distributions and comments on taxonomy
Authors: MacCulloch Ross D. , Lathrop Amy , Kok Philippe J. R. , Ernst Raffael , Kalamandeen Michelle
Published: February 2019

Considerable confusion exists regarding taxonomy and distributions of Oxyrhopus in northern South America. Specimens and records of Oxyrhopus from Guyana were examined. Oxyrhopus melanogenys, O. occipitalis and O. petola occur in Guyana. Data on morphology and colouration of these species are presented. Species distributions and characters to distinguish among the species are discussed.
Bolivian Rhinotragini II: Isthmiade Thomson, 1864 (Coleoptera, Cerambycidae), with two new species
Authors: Clarke Robin O. S.
Published: February 2019

I. martinsi sp. nov. and I. zamalloae sp. nov. are described. Bolivian forms of both sexes of I. ichneumoniformis Bates, 1870, I. laevicollis Tippmann, 1953, and I. planifrons Zajciw, 1972 are redescribed. New synonymy established: I. laevicollis Tippmann, 1953 = I. carinifrons Zajciw, 1972 syn. nov. Notes on host-flowers, photographs and a key to the Bolivian species of Isthmiade are provided.
New species of Ignelater Costa (Coleoptera, Elateridae, Pyrophorini)
Authors: Rosa Simone Policena
Published: February 2019

Ignelater inaguensis sp. nov. from Bahamas, Great Inagua Island is described, illustrated and compared to other Ignelater species. This species is characterized mainly by its elytra, slightly widened from humerus up to the middle or posterior third and the length ratio between elytra and pronotum 2.51-2.71.
Morfologia comparada das terminálias masculina e feminina dos rhagionidae (Diptera, Tabanomorpha) neotropicais
Authors: Carmo Daniel D.D. , Santos Charles Morphy D.
Published: February 2019

Apresentamos uma investigação comparativa da morfologia das terminálias masculina e feminina de gêneros da família Rhagionidae (Diptera, Brachycera, Tabanomorpha) com distribuição neotropical. Partindo do plano básico de Brachycera, hipóteses de homologias entre as peças reprodutivas foram analisadas em um contexto comparativo. Os resultados sugerem que as condições presentes em Rhagionidae são no geral muito modificadas quando comparadas com o ancestral comum mais recente de Brachycera. Este trabalho apresenta uma hipótese filogenética heurística cujos resultados podem servir como base para o entendimento da grande diversificação morfológica das terminálias masculina e feminina dos ragionídeos, apontando para a solução de algumas controvérsias a respeito da morfologia das estruturas reprodutivas do grupo.
Descrição do sincrânio de Cavia aperea (Rodentia, Caviidae) e comparação com as demais espécies do gênero no Brasil
Authors: Cherem Jorge José , Ferigolo Jorge
Published: February 2019

O gênero Cavia inclui quatro espécies no Brasil, C.aperea (pelo menos duas subespécies, C.a.aperea e C.a.pamparum), C.magna, C.intermedia e C.fulgida. Visando contribuir para o conhecimento da anatomia e para a distinção dessas espécies, descreve-se o sincrânio (crânio e mandíbula) de exemplares de C.a.pamparum do Rio Grande do Sul e compara-se com exemplares de C.magna deste estado e de Santa Catarina, C.intermedia da ilha de Moleques do Sul, na costa catarinense, e C.fulgida de Minas Gerais e Paraná. Cavia aperea possui crânio baixo e longo; rostro comprimido lateralmente; constrição interorbital marcada; órbita elíptica com ampla comunicação com a fossa temporal; forâmen infra-orbital amplo e deprimido; mandíbula longa e baixa, com processo angular não refletido lateralmente; fórmula dentária 1I.0C.1P.3M; dentes hipselodontes; molariformes formados por dois prismas, o anterior laminar e o posterior cordiforme. Cavia aperea distingue-se de C.magna pelo menor desenvolvimento da porção rostral do crânio e da raiz ventral do processo zigomático do maxilar; forâmen infraorbital mais deprimido; porção posterior dos frontais e parietais menos convexos; apófises paraoccipitais mais curtas e curvas anteriormente; incisivos superiores mais estreitos e geralmente opistodontes (proodontes em C.magna); fenda terciária externa (fte) mais profunda e com mais cemento; prolongamento anterior à fte mais desenvolvido e constrição na base do prolongamento posterior. Cavia intermedia possui jugal curto; fossa jugal reduzida/ausente; depressão na região interorbital bem marcada; crista sagital larga; constrição lateral no basisfenóide tênue; forâmen magno amplo; supra-occipital baixo; fte rasa e prolongamento anterior pouco desenvolvido; p4 com prisma posterior tão largo quanto o anterior; m3 com prisma anterior mais largo que o posterior e fenda secundária interna menos profunda. Cavia fulgida caracteriza-se por suas dimensões menores e fte muito profunda. Entretanto, exemplares do sul do Brasil com estes caracteres, mas coloração não típica de C.fulgida, podem pertencer à C.aperea, sendo necessários mais estudos para esclarecer esta questão.
Seasonal fluctuation in the population of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) and co-occurrence with other Coccinellids in the Federal District of Brazil
Authors: Harterreiten-Souza Érica Sevilha , Togni Pedro Henrique Brum , Milane Paloma Virgínia Gambarra Nitão , Cavalcante Kelly Ramalho , Medeiros Maria Alice de , Pires Carmen Silvia Soares , Sujii Edison Ryoiti
Published: February 2019

The multicolored Asian lady beetle, Harmonia axyridis (Pallas, 1773), was first recorded in Brazil in 2002 in Paraná state and subsequently observed in Santa Catarina, Rio Grande do Sul and Minas Gerais. This species can spread to new areas and become dominant in the local community, reducing the density and diversity of native species, mainly Coccinellidae. The objective of this work was to record for the first time the occurrence of H. axyridis in the Federal District and its co-occurrence with other Coccinellidae species. The individuals were collected directly from plants at an organic farm in Taguatinga and in experimental fields of Embrapa Hortaliças, located in the Federal District, from August 2008 to January 2010. We collected 881 Coccinelids, and of these, 110 belong to the species H. axyridis. These were found exclusively on the following plants of the succinea group: maize, cabbage, cauliflower, broccoli, kale, cucumber, cotton, tomato and coriander. We also observed its co-occurrence with the following lady beetle species: Cycloneda sanguine (Linnaeus, 1763), Hippodamia convergens (Guerin-Meneville 1842), Eriopis connexa (German, 1824), Scymnus sp., Nephaspis sp., Azya luteipes (Mulsant, 1850), Hyperaspis festiva (Mulsant, 1850), Olla v-nigrum (Mulsant, 1866), Psyllobora sp. and Coleomegilla maculata (De Geer, 1775). So far, we have not found any negative interactions between H. axyridis and these species. This is the northernmost H. axyridis record in Brazil. Moreover, the region was previously considered to have a low probability of occurrence for this species. Therefore, this record confirms that H. axyridis presents great adaptive plasticity to new habitats.
Evaluation of MICP treatment through EC and pH tests in urea hydrolysis process
Authors: Wen Kejun , Li Yang , Liu Shihui , Bu Changming , Li Lin
Published: February 2019

Microbially induced calcite precipitation (MICP) using ureolytic bacteria has been investigated to improve the engineering properties of soil. Urease, produced by ureolytic bacteria, can hydrolyse urea to drive the biogeochemical reaction in MICP. The goal of this study was to use changes in electrical conductivity (EC) and pH values from the urea hydrolysis test as an indicator to monitor the ureolytic activities of bacteria before the MICP process and using this indicator to maintain a consistent MICP treatment. Laboratory experiments were conducted to establish the relationship between the EC and pH values and unconfined compression strength (UCS) of MICP-treated soil. The EC and pH values of the mixed solution were measured after adding bacterial suspension into urea solution. Then, the bacterial suspension was mixed with a sand sample and cementation medium to drive the MICP process. The results showed that, once the bacterial suspension was mixed with urea, the EC and pH values of the mixed solution increased immediately due to urea hydrolysis. The optimum EC and pH values at 60 min were found to be 1·50–1·80 mS/cm and 8·82–9·02, respectively, to achieve consistent UCS performance of MICP-treated specimens with 0·25 M calcium (Ca) cementation medium.
Large-scale pullout testing and numerical evaluation of U-shape polymeric straps
Authors: Razzazan S. , Keshavarz A. , Mosallanezhad M.
Published: February 2019

In this paper, U-shape polymeric strap (UPS) reinforcement, which can develop passive resistance in the soil, is investigated. The curved (looped) part of the strap at the free end of the reinforcement generates a passive resistance in the soil and increases the pullout resistance beyond what is available due to friction of the horizontal portions of the strap. In this paper, UPS pullout resistance is first compared with that of the typical double polymeric strap (DPS) through large-scale pullout experiments. The experimental results in compacted granular soil show that the curved strap part of the DPS configuration is capable of increasing the pullout resistance by about 130–194%. To improve understanding of pullout behavior, 3D finite element modeling was used to model the pullout behavior of the DPS and UPS configurations. In addition, the bearing resistance factor (Nq) was calculated using three equations for general shear failure, punching shear failure and ‘hybrid’ failure. The equation for general shear failure gave the best agreement with measured values of Nq from the laboratory pullout tests.
Retrofitting of defected reinforced-concrete cantilever slabs using different techniques
Authors: Afefy Hamdy M. , Baraghith Ahmed T. , Mahmoud Mohamed H.
Published: February 2019

This paper presents the experimental findings for different strengthening techniques applied on defected reinforced-concrete cantilever slabs to restore lost flexural capacities owing to insufficient bond length of the main tensile steel. The restoration technique was based on compensation of the main tensile steel by near-surface mounted steel bars, externally bonded steel plates or externally bonded carbon fibre-reinforced polymer sheets. In addition, new hybrid techniques are presented, which merge the traditional techniques with a 20 mm thick ultra-high-performance strain-hardening cementitious composites (UHP-SHCC) layer. It was found that the strengthening technique based on the embedded steel bars on the UHP-SHCC overlay enabled the strengthened slab to restore its lost capacity and outperformed it by about 5% compared to that of the properly detailed slab. Nevertheless, this restoration was at the expense of the exhibited ductility. Conversely, the strengthening technique based on the application of externally bonded steel plates on a transition layer of the UHP-SHCC material enabled the strengthened slab to restore the lost capacity by about 96% as well as to outperform its ductility by more than 29% compared to those of the properly detailed slab.
Residual properties of concrete exposed to elevated temperatures
Authors: Rafi Muhammad Masood , Aziz Tariq , Lodi Sarosh Hashmat
Published: February 2019

The elevated temperature behaviours of concrete specimens made of three different concrete grades are presented in this paper. Cylindrical specimens of concrete mixes with 17 MPa (designated as M17), 21 MPa (designated as M21) and 27 MPa (designated as M27) target strengths were employed. Different temperature progression in the core of the concrete cylinders was observed for specimens of different concrete grades. Concrete discoloration started at 300°C, while hairline cracks appeared at 400°C on the surface of the cylinders. Pore pressure generated by steam and carbon dioxide during heating of the cylinders caused explosive spalling at a furnace temperature of 400–600°C. Similar loss of compressive strength of concrete was found for all the employed mixes, which reached to nearly 70% at 800°C. The ultimate strain of concrete increased at higher temperatures. The loss of concrete elastic modulus reached 80%, whereas nearly 50% tensile strength was lost at 600°C. A comparison of observed data with the theoretical predictions based on the analytical models suggested by some of the international codes was made and differences between the predicted and observed data were found. Coefficients of strength reduction and corresponding strains were proposed, which correlated well with the observed stress–strain curves.
НЕЛИНЕЙНЫЕ ЭФФЕКТЫ СОВМЕСТНОГО ВОЗДЕЙСТВИЯ ОКСИДОВ р- И d-ЭЛЕМЕНТОВ ПРИ СОЗДАНИИ ТОНКИХ ПЛЕНОК НА ПОВЕРХНОСТИ GaAs И InP ОБЗОР
Authors: Kostryukov Victor F. , Mittova Irina Y. , Tominа Elena V. , Sladkopevtsev Boris V. , Parshina Anna S. , Balasheva Dar'ya S.
Published: February 2019

Рассмотрен процесс термооксидирования арсенида галлия и фосфида индия под воздействием бинарных оксидных композиций (хемостимулятор+хемостимулятор и хемостимулятор+инертный компонент). Установлены и интерпретированы нелинейные эффекты зависимости толщины оксидной пленки на поверхности GaAs и InP от состава композиции оксидов-хемостиуляторов. Доказана возможность получения аддитивной во всем интервале составов зависимости толщины оксидной пленки на поверхности GaAs от состава при использовании композиций оксид-хемостимулятор+инертный компонент. Установлена пространственная локализация связывающих взаимодействий между оксидами-хемостимуляторами, которые приводят к наблюдаемым нелинейным эффектам. Синтезированные таким способом тонкие пленки на поверхности GaAs и InP обладают улучшенными электрофизическими свойствами и проявляют газочувствительный отклик в атмосфере газов-восстановителей.

 

Результаты исследований получены на оборудовании Центра коллективного пользования Воронежского государственного университета. URL:http://ckp.vsu.ru

Работа выполнена при поддержке гранта РФФИ № №18-03-00354_а
LOCAL PARAMETERS OF THE SURFACE ROUGHNESS OF ELECTROCHEMICALLY DEALLOYED Ag-Pd ALLOYS
Authors: Bedova Eugenia V. , Grechkina Margarita V. , Kozaderov Oleg A.
Published: February 2019

Local characteristics of surface roughness of the polycrystalline Ag-Pd solid solutions (4 and 8 at. % Pd) which underwent potentiostatic electrochemical dealloying in an acidic nitrate aqueous solution were determined by scanning electron and atomic force microscopy. A qualitative analysis of the SEM and AFM micrographs demonstrated substantial morphological roughening of the surface of Ag-Pd alloys. This results from the formation of hollows and cracks caused by selective leaching of electronegative silver and recrystallization of electropositive palladium into its highly-developed phase.  A quantitative analysis of the AFM-data allowed us to determine the numerical values of the main local roughness characteristics of anodically modified alloys.  The negative value of the coefficient of surface asymmetry indicates the formation of deep cavities during the dealloying process.  The recorded mean roughness generally depends on the AFM-scanning zone, but it stabilizes if the scan zone exceeds several tens of micrometers. The roughness of dealloyed Ag-Pd systems is of micro- and nano-size and increases with anodic potential and electric charge of the electrochemical modification of both studied Ag4Pd and Ag8Pd alloys.  This effect can be accounted for by a significant rise in the anodic dissolution rate of silver from the alloys in the overcritical region of polarization, resulting in the formation of deeper surface defects.  An increase in the average height of surface irregularities with modification time conforms to the square root law, confirming the non-stationary mass transfer kinetics of the selective dissolution process. Variation of the anodic potential and electric charge makes it possible to find the optimal conditions for the electrochemical synthesis of electrode Ag-Pd materials with given values of arithmetic mean and root-mean-square roughness.  The assumption that harmonic sinusoidal function represents the Ag-Pd surface microprofile proved the linear dependence of the roughness factor on dealloying time.
ANALYSIS OF STATISTICAL CHARACTERISTICS OF QUASI-BREATHER IN MONOATOMIC FCC METALS Au, Cu, Ni, Pd AND Pt
Authors: Eremin Alexander M. , Zakharov Pavel V. , Starostenkov Mikhail D. , Vdovin Alexey S.
Published: February 2019

The molecular dynamics method is used to calculate and analyze the statistical characteristics of a quasi-breather with a hard type of nonlinearity in monoatomic FCC metals, for example, Cu, Au, Pt, Ni and Pd. Within the framework of this model, the following statistical characteristics and dependencies were calculated for quasi-breathers: a grouped statistical series of absolute and relative frequencies, a polygon of absolute and relative frequencies, a histogram of relative frequencies, an empirical distribution function, an estimate of the mathematical expectation and variance of the original sample. The densities of phonon states are calculated for all crystals. Statistics allow you to understand the causes of the destruction of breathers and more fully describe the process of their dissipation of energy.

 

 

ACKNOWLEDGMENTS

For AME, PVZ, the study was carried out with the financial support of the Russian Federal Property Fund and the Altai Territory within the framework of the scientific project No. 18-42-220002; The MDS is grateful to the Ministry of Education and Science of the basic part of the state task, project No. 3.4820.2017/BC.
ПОВЫШЕНИЕ АДГЕЗИОННЫХ СВОЙСТВ КОММУТАЦИОННЫХ СЛОЁВ НА ПОЛУПРОВОДНИКОВЫХ ВЕТВЯХ р-ТИПА ТЕРМОЭЛЕКТРИЧЕСКИХ ГЕНЕРАТОРНЫХ БАТАРЕЙ
Authors: Belonogov Evgenii K. , Dybov Vladislav A. , Kostyuchenko Aleksandr V. , Kuschev Sergei B. , Serikov Dmitrii V. , Soldatenko Sergei A. , Fedorova Elena N. , Pogorelova Maria A. , Roslyakov Artem O.
Published: February 2019

Проведены сравнительные исследования фазового состава, морфологии, твердости и адгезии поверхности полупроводниковых термоэлектрических ветвей на основе твердого раствора Bi2Te3-Sb2Te3 р-типа проводимости, полученных методом горячего прессования, после модификации поверхности различными методами (механическая обработка (МП), импульсная фотонная обработка (ИФО), электрохимическая полировка (ЭХП)). Установлено, что МП упрочняет приповерхностный слой, повышает в 2 раза адгезию коммутационных барьерных слоев Mo–Ni. Последующие ЭХП повышает адгезию слоев Mo–Ni в 1.3 раза, а ИФО в 1.4 раза в сравнении с ветвями после МП.

 

Работа выполнена с использованием научного оборудования Центра коллективного пользования им. проф. Ю. М. Борисова ВГТУ, Центрально-Черноземного коллективного центра анализа структуры, элементного и химического состава материалов ВГТУ и при финансовой поддержке Министерства образования и науки Российской Федерации в рамках постановления Правительства Российской Федерации от 9 апреля 2010г. №218 (Договор № 03.G25.31.0246).
СИНТЕЗ СУБМИКРОЧАСТИЦ SrO и BaO МЕТОДОМ ТЕРМИЧЕСКОГО РАЗЛОЖЕНИЯ АЭРОЗОЛЕЙ
Authors: Gorshkov Aleksandr I. , Gribanov Eugene N. , Osckotskaya Emma R.
Published: February 2019

В работе получены субмикрочастицы оксида стронция и оксида бария методом термического разложения аэрозолей. Природа синтезируемых соединений доказана методом ИК-спектроскопии. Определены характерные линейные размеры и изучена морфология поверхности частиц методом атомно-силовой микроскопии. Показано, что при пиролизе происходит дробление капли жидкости, а образующаяся твердая фаза представляет собой полые сферы. На основе спектров диффузного отражения определена оптическая ширина запрещенной зоны объектов. Полученные данные представляют интерес при дальнейшем изучении свойств субмикро- и наноструктур на основе SrO и BaO, а также при синтезе новых функциональных материалов, обладающих улучшенным комплексом свойств.
СИСТЕМАТИКА РЕШЕТОК СОВПАДАЮЩИХ УЗЛОВ ДЛЯ ОЦК И ГЦК КРИСТАЛЛОВ
Authors: Darinskiy Boris M. , Efanova Natalia D. , Prizhimov Andrey S.
Published: February 2019

В настоящей работе предложена новая методика построения решетки совпадающих узлов для ОЦК и ГЦК кристаллов. Получены условия образования орторомбической, тетрагональной и кубической решетки совпадений и указаны конкретные решетки этих сингоний. Показаны возможные поликристаллические структуры, имеющие общую решетку совпадающих узлов.
ЭНТРОПИЙНАЯ АГРЕГЦАИЯ УНТ В ВЫСЫХАЮЩЕЙ КАПЛЕ НА ГИДРОФИЛЬНОЙ И ГИДРОФОБНОЙ ПОДЛОЖКЕ
Authors: Dolgih Igor I. , Bitutskaya Larisa A.
Published: February 2019

При изучении агрегации углеродных нанотрубок в условиях гидродинамической неустойчивости высыхающей капли на гидрофобных и гидрофильных подложках выявлена определяющая роль гидродинамических течений. Установлено, что протекание энтропийной агрегации нанотрубок в капле под действием аэросила зависит от типа подложки.

 

Работа выполнена при финансовой поддержке РФФИ (проект № 16-43-360281 р_а).
РАСТВОРИМОСТЬ ФОСФОРА В МОНОАРСЕНИДЕ ОЛОВА
Authors: Semenova Galina V. , Sushkova Tatiana P. , Zinchenko Elena N. , Yakunin Sergei V.
Published: February 2019

Для выяснения конфигурации области гомогенности твердого раствора фосфора в моноарсениде олова методом рентгенофазового анализа были исследованы отожженные при температуре 753 К сплавы, принадлежащие политермическим сечениям SnAs–Sn4Р3, SnAs–Sn0.43P0.57, SnAs–SnP3, SnAs–P тройной системы Sn–As–P. Установлено, что область существования твердых растворов на основе SnAs имеет асимметричную форму, смещенную в сторону избытка летучих компонентов, причем максимальная растворимость фосфора (30-40 мол. %) отвечает направлению политермического сечения SnAs–SnP3. Сам моноарсенид олова обладает заметной областью гомогенности, о чем свидетельствует разница параметров решетки образцов, чей состав был приближен к противоположным границам области гомогенного существования фазы путем отжига в контакте через паровую фазу с гетерогенными смесями составов Sn0.39As0.61 и Sn0.535As0.465.

 

Результаты исследований получены на оборудовании ЦКПНО ВГУ.
Human Islet Cryopreservation v1
Authors: Lyon James , F Spigelman Aliya , E Manning Fox Jocelyn , E Macdonald Patrick
Published: February 2019

This protocol details the cryopreservation of human islets, as performed by the Alberta Diabetes Institute IsletCore. Human islets cryopreserved using this method have been found to retain viability and function after 20years of cryogenic biobanking. Manning Fox JE, Lyon J, Dai XQ, Wright RC, Hayward J, van de Bunt M, Kin T, Shapiro AMJ, McCarthy MI, Gloyn AL, Ungrin MD, Lakey JR, Kneteman NM, Warnock GL, Korbutt GS, Rajotte RV, MacDonald PE (2015) Human islet function following 20 years of cryogenic biobanking. Diabetologia,58(7): 1503-1512.
Dynamic electroneurostimulation in the treatment of knee osteoarthritis
Authors: Kadochnikova Ekaterina Yu. , Lesnyak Olga M.
Published: February 2019

Transcutaneous electroneurostimulation is an effective method of chronic pain relief. Dynamic electrical neurostimulation is a type of transcutaneous electroneurostimulation based on the use of weak (200–400 mkA) low frequency (10–200 Hz) pulse currents. A feature of this type of physiotherapy is the pulse shape, which changes following the change of the total electrical resistance of underelectrode skin area, which enables prolonged use without “addiction”. A multicenter randomized double-blind placebo-controlled study with 132 patients was conducted. Dynamic electrical neurostimulation led to a rapid decrease in the intensity of pain in the knee joint by an average of 5–8 mm on a visual-analogue scale immediately after the end of the procedure in the absence of pain dynamics of the procedure performed by the placebo. After completing the course of treatment from 10 procedures during the month of follow-up, the intensity of pain according to visual-analogue scale in patients of the dynamic electrical neurostimulation group was lower than in placebo. The decrease in pain intensity was also accompanied by a decrease in the time of the “Get up and go” test and an improvement in the Leken index. The statistically significant difference between the groups in the time of the “Stand up and go” test appeared at the end of the course of therapy and persisted for a month after the end of the course of therapy. Dynamic electrical neurostimulation is an effective and safe method for reducing pain and improving the function of the knee joint in patients with osteoarthritis.
Artifficial Reefs - New Habitats of Marine Life
Authors: Zahtila Albert , Zahtila Elvis , Dejhalla Roko
Published: February 2019

The aim of this paper is to analyze the problem of artificial reefs, to warn to the need for definition of such facilities in the national legal framework and in the context of urban ecology, present their potential for the marine environment. A review and analysis of national legal frameworks and European regulations regarding the possibilities of their establishment and management is given, all towards to reduce the eutrophication process, the increase of the fish stock and the creation of a zone for the prohibition of fishing in order to protect the coastline and enable the renewal of marine biodiversity and ecosystems in Republic of Croatia.