bluuebunny/crossref_metadata_2025_split huggingface dataset:
Potensi Biji Kolowe (Chydenanthus excelsus) Sebagai Pisisidal
Authors: Rijai Laode 
Published: May 2017

ABSTRACT

Kolowe seeds (C. excelsus) has strong potential as piscicidal. Research conducted on the potential piscicidal bioindikator swamp eel fish (Synbranchus bengalensis Mc.Cllel), which is one of the pests in shrimp ponds. The piscicidal test results of kolowe seeds to S.bengalensis fish are fresh seed powder (LC50 = 305, 50 ppm); dry powder (LC50 = 315.35 ppm); crude methanol extract (LC50 = 345.20 ppm); frakasi n-Butanol extract (LC50 = 265.85) and the fraction of ethylacetate extract (LC50 = 650.90). The results are quite robust and selective as the most dominant secondary metabolites are saponins.

Key words: C. excelsus, Piscicidal

ABSTRAK

Biji kolowe (C. excelsus) memiliki potensi yang kuat sebagai pisisidal. Penelitian potensi pisisidal dilakukan terhadap bioindikator ikan belut rawa (Synbranchus bengalensis Mc.Cllel) yang merupakan salah satu hama pada tambak udang. Hasil uji pisisidal biji kolowe terhadap ikan S.bengalensis tersebut adalah serbuk biji segar (LC50 = 305, 50 ppm); serbuk kering (LC50 = 315,35 ppm); ekstrak kasar metanol (LC50 = 345,20 ppm); ekstrak frakasi n-Butanol (LC50 = 265,85); dan esktrak fraksi etilasetat (LC50 = 650,90). Hasil penelitian tersebut cukup kuat dan selektif karena metabolit sekunder paling dominan adalah saponin.

Kata Kunci: Biji C. excelsus, pisisidal
Analisis Kandungan Garam Gunung Asal Krayan Kabupaten Nunukan Kalimantan Timur
Authors: Herman Herman , Rusli Rolan 
Published: May 2017

Has been studied composition of mountain salt from Krayan, Nunukan, East Kalimantan. This study aims to determine the composition of the minerals contained in the mountain salt. Mountain salt is obtained from wells Krayan District residents were further prepared for analysis using a technique using Atomic Absorption Spectrometer (AAS), further by looking at the pattern of X-ray Diffraction (XRD) and Scanning electron microscopic (SEM). Based on the results obtained AAS has identified mineral deposits include: Na, K, Mg, Al, Cu, Zn, Fe, Ba, and Sr. From the results of XRD shows that the main peak of the salt Krayan shows major peaks for NaCl crystals with impurities such as KCl, CaCl2, MgCl2, and AlCl3. SEM observation showed that morphology of Krayan salt have cube shape which is the shape of NaCl crystals with space group Fm3m and lattice parameter (a) 5.620 Ã…
Keywords : Mountain Salt, krayan, AAS, XRD, SEM

Abstrak
Telah dilakukan penelitian analisis kandungan garam gunung asal Krayan Kabupaten Nunukan Kalimantan Timur. Penelitian ini bertujuan untuk mengetahui komposisi mineral yang terkandung dalam garam gunung. Garam gunung diperoleh dari sumur warga Kecamatan Krayan yang selanjutnya dipreparasi untuk dianalisis dengan menggunakan menggunakan teknik Spektrometer Serapan Atom (SSA), selanjutnya dengan melihat pola Difraksi Sinar X (XRD), dan Scanning Elektron Microscopy (SEM). Berdasarkan hasil SSA telah diidentifikasi diperoleh kandungan mineral antara lain: Na, K, Mg, Al, Cu, Zn, Fe, Ba, dan Sr. Dari hasil XRD terlihat bahwa puncak utama dari garam krayan tersebut menunjukkan puncak utama untuk Kristal NaCl, dengan impurities antara lain KCl, CaCl2, MgCl2, dan AlCl3. Selain itu hal ini didukung pula oleh pengamatan SEM, bahwa morfologi SEM garam krayan memperlihatkan bentuk kristal kubus yang merupakan bentuk dari Kristal NaCl dengan grup ruang Fm3m dengan panjang kisi kristal 5,620 Ã….
Kata Kunci : Garam Gunung, Krayan, SSA, XRD,SEM
A EDUCAÇÃO AMBIENTAL NOS CONTEÚDOS DE ECOLOGIA DE LIVROS DIDÁTICOS DE BIOLOGIA DO ENSINO MÉDIO
Authors: Freire Laísa Maria , Dos Santos Ana Paula Neves , Miceli Bianca Sarpa 
Published: May 2017

O conhecimento ecológico é indispensável ao enfrentamento de problemas ambientais contudo, na sua relação com a Educação Ambiental (EA) tem sido alvo de críticas. Além disso, o livro didático (LD) tem histórica influência na seleção e organização dos conteúdos e métodos de ensino influenciando o trabalho do professor. Deste modo, buscamos olhar para os textos presentes em LD escolares do ensino médio e identificar onde e como a questão ambiental está apresentada; identificar temas ambientais presentes nos conteúdos de Ecologia e o tipo de abordagem da EA nos textos selecionados. Foram analisados dois LD do ensino médio a partir de análises de conteúdo. Caracterizamos as unidades de Ecologia nos livros e selecionamos dois textos complementares presentes no LD1 e um texto principal presente do LD2 para a análise de conteúdo e inferência sobre as abordagens da EA presentes no material. Os três textos selecionados foram escolhidos por terem um eixo comum “consumo”. Os resultados mostraram que os temas ambientais estão presentes nos LD, embora a maior parte esteja inserida em um “texto complementar” sendo apresentado como uma informação extra. Observou-se que vários textos presentes no livro se situam em macrotendências conservacionistas da EA, além de apresentar uma visão utilitarista, pragmática onde a natureza é vista apenas como uma fonte de recursos para o ser humano. Conclui-se que, embora as questões ambientais se façam presentes nos LD, a forma com que esses temas são apresentados compromete a formação de cidadãos ambiental e socialmente conscientes.
LIGAÇÕES ENTRE O ENSINO DE GINÁSTICA ARTÍSTICA ESCOLAR E O DESENVOLVIMENTO MOTOR DE CRIANÇAS: UM ESTUDO DE REVISÃO
Authors: Vinciprova Chiesse de Andrade Thais , Da Silva Rocha Érica Cristina , Paraíso Alves Marcelo , Vinciprova Fonseca Maria Da Conceição 
Published: May 2017

Em virtude de novas tecnologias e mudanças que estão acompanhando a contemporaneidade, a falta de atividade física e estímulos motores estão cada vez mais comuns. Isso torna o papel do professor de Educação Física ainda mais importante, visto que muitos alunos são quase exclusivamente estimulados a práticas orientadas de exercícios físicos durante a aula de Educação Física Escolar. O presente estudo tem como objetivo discutir a contribuição da Ginástica Artística (GA) para o desenvolvimento motor da criança no Ensino Fundamental – anos iniciais. A metodologia é composta de uma a revisão bibliográfica, onde buscamos artigos, livros, sites, anais de eventos relacionados ao tema e dissertações e teses que defendem a proposta do mesmo. O estudo é relevante na medida em que procura discutir a Ginástica Artística como colaboradora no processo de desenvolvimento motor da criança, oportunizando outro enfoque à modalidade, na maioria das vezes vista como um esporte de alto nível e difícil acesso, sendo quase inexistente na escola. Um segundo aspecto a ser ressaltado é a falta de estudos e publicações sobre a GA, o que dificulta o aprimoramento de profissionais interessados em atuar na modalidade. É possível perceber que a Ginástica Artística possui características próprias que podem servir para aumentar os estímulos motores e desafiar o aluno a buscar mais, sendo uma boa opção de conteúdo para o Ensino fundamental – anos iniciais. Fazendo uma análise das habilidades motoras que devem ser desenvolvidas nessa fase escolar, identificamos uma relação direta das mesmas com as atividades desenvolvidas na Ginástica Artística.
Pesquisa Científica no Curso de Enfermagem: Revisão Integrativa
Authors: Oliveira Marcela Pereira , Silva Ilda Cecília Moreira da , Albuquerque Gabriela Girão 
Published: May 2017

O curso de enfermagem vem buscando modificar o perfil do profissional, através de uma formação técnica, científica, crítica e reflexiva por intermédio da pesquisa científica. Porém, parte desses alunos são desestimulados ao realizar essa atividade. Este trabalho teve como objetivo buscar evidências cientificas sobre a percepção do aluno de enfermagem acerca da pesquisa científica. Utilizou-se como metodologia a revisão integrativa. A pesquisa foi realizada em bases de dados na área da saúde e os descritores utilizados foram: estudantes de enfermagem e pesquisa em enfermagem. Foram encontrados 15 artigos. Percebeu-se que os alunos entendem a importância da pesquisa científica na formação e no desenvolvimento acadêmico e profissional. A falta de integração entre instituições de ensino superior e os serviços de saúde foi apontada como dificuldade para realização e elaboração de pesquisas cientificas. As instituições de ensino superior, as atividades de extensão e o apoio docente foram apontados como essenciais no estímulo do aluno ao ato constante da pesquisa. Considera-se a necessidade da mudança do perfil do professor para melhor desenvolvimento do aluno e a busca por metodologias e instrumentos para o estímulo do estudo e do desenvolvimento da prática em questão. Além disso, melhor integração ensino com os serviços de saúde.Palavras-chave: Estudantes de Enfermagem, Pesquisa Científica, Metodologia.
Functional Characterization of C-terminal Ryanodine Receptor 1 Variants Associated with Central Core Disease or Malignant Hyperthermia
Authors: Parker Remai , Schiemann Anja H. , Langton Elaine , Bulger Terasa , Pollock Neil , Bjorksten Andrew , Gillies Robyn , Hutchinson David , Roxburgh Richard , Stowell Kathryn M. 
Published: May 2017

Background: Central core disease and malignant hyperthermia are human disorders of skeletal muscle resulting from aberrant Ca2+ handling. Most malignant hyperthermia and central core disease cases are associated with amino acid changes in the type 1 ryanodine receptor (RyR1), the skeletal muscle Ca2+-release channel. Malignant hyperthermia exhibits a gain-of-function phenotype, and central core disease results from loss of channel function. For a variant to be classified as pathogenic, functional studies must demonstrate a correlation with the pathophysiology of malignant hyperthermia or central core disease. Objective: We assessed the pathogenicity of four C-terminal variants of the ryanodine receptor using functional analysis. The variants were identified in families affected by either malignant hyperthermia or central core disease. Methods: Four variants were introduced separately into human cDNA encoding the skeletal muscle ryanodine receptor. Following transient expression in HEK-293T cells, functional studies were carried out using calcium release assays in response to an agonist. Two previously characterized variants and wild-type skeletal muscle ryanodine receptor were used as controls. Results: The p.Met4640Ile variant associated with central core disease showed no difference in calcium release compared to wild-type. The p.Val4849Ile variant associated with malignant hyperthermia was more sensitive to agonist than wild-type but did not reach statistical significance and two variants (p.Phe4857Ser and p.Asp4918Asn) associated with central core disease were completely inactive. Conclusions: The p.Val4849Ile variant should be considered a risk factor for malignant hyperthermia, while the p.Phe4857Ser and p.Asp4918Asn variants should be classified as pathogenic for central core disease.
A weighted difference of L1 and L2 on the gradient minimization based on alternating direction method for circular computed tomography
Authors: Lu Wanli , Li Lei , Cai Ailong , Zhang Hanming , Wang Linyuan , Yan Bin 
Published: May 2017

Iterative reconstruction algorithms for computed tomography (CT) through total variation (TV) regularization can provide accurate and stable reconstruction results. TV minimization is the L1-norm of gradient-magnitude images and can be regarded as a convex relaxation method to replace the L0 norm. In this study, a fast and efficient algorithm, which is named a weighted difference of L1 and L2 ( L1 - αL2) on the gradient minimization, was proposed and investigated. The new algorithm provides a better description of sparsity for the optimization-based algorithms than TV minimization algorithms. The alternating direction method is an efficient method to solve the proposed model, which is utilized in this study. Both simulations and real CT projections were tested to verify the performances of the proposed algorithm. In the simulation experiments, the reconstructions from the proposed method provided better image quality than TV minimization algorithms with only 7 views in 180 degrees, which is also computationally faster. Meanwhile, the new algorithm enabled to achieve the final solution with less iteration numbers.
Star Formation Quenching Timescale of Central Galaxies in a Hierarchical Universe
Authors: Hahn ChangHoon , Tinker Jeremy L. , Wetzel Andrew 
Published: May 2017

Abstract
Central galaxies make up the majority of the galaxy population, including the majority of the quiescent population at

. Thus, the mechanism(s) responsible for quenching central galaxies play a crucial role in galaxy evolution as whole. We combine a high-resolution cosmological N-body simulation with observed evolutionary trends of the “star formation main sequence,” quiescent fraction, and stellar mass function at

to construct a model that statistically tracks the star formation histories and quenching of central galaxies. Comparing this model to the distribution of central galaxy star formation rates in a group catalog of the SDSS Data Release 7, we constrain the timescales over which physical processes cease star formation in central galaxies. Over the stellar mass range

we infer quenching e-folding times that span 1.5–0.5 Gyr with more massive central galaxies quenching faster. For

, this implies a total migration time of

from the star formation main sequence to quiescence. Compared to satellites, central galaxies take

longer to quench their star formation, suggesting that different mechanisms are responsible for quenching centrals versus satellites. Finally, the central galaxy quenching timescale we infer provides key constraints for proposed star formation quenching mechanisms. Our timescale is generally consistent with gas depletion timescales predicted by quenching through strangulation. However, the exact physical mechanism(s) responsible for this remain unclear.
Testing for X-Ray–SZ Differences and Redshift Evolution in the X-Ray Morphology of Galaxy Clusters
Authors: Nurgaliev D. , McDonald M. , Benson B. A. , Bleem L. , Bocquet S. , Forman W. R. , Garmire G. P. , Gupta N. , Hlavacek-Larrondo J. , Mohr J. J. , Nagai D. , Rapetti D. , Stark A. A. , Stubbs C. W. , Vikhlinin A. 
Published: May 2017

Abstract
We present a quantitative study of the X-ray morphology of galaxy clusters, as a function of their detection method and redshift. We analyze two separate samples of galaxy clusters: a sample of 36 clusters at

selected in the X-ray with the ROSAT PSPC 400 deg2 survey, and a sample of 90 clusters at

selected via the Sunyaev–Zel’dovich (SZ) effect with the South Pole Telescope. Clusters from both samples have similar-quality Chandra observations, which allow us to quantify their X-ray morphologies via two distinct methods: centroid shifts (w) and photon asymmetry (

). The latter technique provides nearly unbiased morphology estimates for clusters spanning a broad range of redshift and data quality. We further compare the X-ray morphologies of X-ray- and SZ-selected clusters with those of simulated clusters. We do not find a statistically significant difference in the measured X-ray morphology of X-ray and SZ-selected clusters over the redshift range probed by these samples, suggesting that the two are probing similar populations of clusters. We find that the X-ray morphologies of simulated clusters are statistically indistinguishable from those of X-ray- or SZ-selected clusters, implying that the most important physics for dictating the large-scale gas morphology (outside of the core) is well-approximated in these simulations. Finally, we find no statistically significant redshift evolution in the X-ray morphology (both for observed and simulated clusters), over the range of

to

, seemingly in contradiction with the redshift-dependent halo merger rate predicted by simulations.
The Weakly Nonlinear Magnetorotational Instability in a Global, Cylindrical Taylor–Couette Flow
Authors: Clark S. E. , Oishi Jeffrey S. 
Published: May 2017

Abstract
We conduct a global, weakly nonlinear analysis of the magnetorotational instability (MRI) in a Taylor–Couette flow. This is a multiscale, perturbative treatment of the nonideal, axisymmetric MRI near threshold, subject to realistic radial boundary conditions and cylindrical geometry. We analyze both the standard MRI, initialized by a constant vertical background magnetic field, and the helical MRI, with an azimuthal background field component. This is the first weakly nonlinear analysis of the MRI in a global Taylor–Couette geometry, as well as the first weakly nonlinear analysis of the helical MRI. We find that the evolution of the amplitude of the standard MRI is described by a real Ginzburg–Landau equation (GLE), whereas the amplitude of the helical MRI takes the form of a complex GLE. This suggests that the saturated state of the helical MRI may itself be unstable on long spatial and temporal scales.
Zygapophyseal Joint Fusion in Ankylosing Spondylitis Assessed by Computed Tomography: Associations with Syndesmophytes and Spinal Motion
Authors: Tan Sovira , Yao Jianhua , Flynn John A. , Yao Lawrence , Ward Michael M. 
Published: May 2017

Objective.Because zygapophyseal joints (ZJ) are difficult to visualize on radiographs, little is known about the relationship of ZJ fusion to other features of spinal damage in ankylosing spondylitis (AS). We used computed tomography (CT) to investigate the concordance of ZJ fusion and syndesmophytes, and examined the contribution of both features to spinal motion.Methods.We performed thoracolumbar CT scans (T10–T11 to L3–L4) on 55 patients. Two readers scored scans for ZJ fusion, which were compared to syndesmophyte height and extent of bridging, measured by computer algorithm at the same levels. We used multiple regression analysis to evaluate the relative contributions of ZJ fusion and syndesmophytes to spinal mobility.Results.Fifty-one percent of patients had ZJ fusion in at least 1 vertebral level. Fusion was present in 129 of 652 individual ZJ. Syndesmophytes and bridging were often present in vertebral levels without ZJ fusion, suggesting that syndesmophytes most often develop first. ZJ fusion was present in 34% of vertebral levels with syndesmophytes and 55.9% of levels with bridging, suggesting a closer association with bridging. Syndesmophytes and ZJ fusion had similar associations with the modified Schober test, but syndesmophytes were more strongly associated with limitations in lateral thoracolumbar flexion. ZJ rarely showed new fusion over 4 years.Conclusion.Thoracolumbar ZJ fusion in AS is rarely present at vertebral levels without syndesmophytes. Syndesmophytes, therefore, likely appear before ZJ fusion at a given vertebral level. Both syndesmophytes and ZJ fusion contribute to limited forward lumbar flexion, but syndesmophytes contribute more to limited lateral flexion.
L’innovation numérique et technologique dans le secteur vêtement-mode : les politiques publiques en soutien à la création d’un écosystème d’affaires intersectoriel
Authors: Yagoubi Amina , Tremblay Diane-Gabrielle 
Published: May 2017

Nous avons réalisé une recherche qualitative dans le vêtement intelligent et les wearables . Notre question de recherche porte sur les conditions d’émergence d’un écosystème d’affaires d’innovations numériques et technologiques, rassemblant un ensemble d’acteurs d’horizons différents, privés et publics, pour le développement du marché des wearables et des vêtements intelligents. Nous avons observé que cela se fait sur la base de collaborations entre secteurs et industries qui traditionnellement ne se concertaient pas entre eux, mais qui ont été incités à le faire, par certains programmes et organismes publics. Ces rencontres entre technologies de l’information (TI), textile et vêtement satisfont de nouveaux besoins dans des marchés divers, en pleine croissance, tels que ceux de la santé, l’aérospatiale, le bien-être, la sécurité, le sport, la gérontologie. Si les entreprises ne paraissent pas toutes bien connaître les programmes, elles reconnaissent l’importance déterminante des échanges, des collaborations, des fertilisations croisées entre secteur TI et vêtement-mode. JEL Codes : O32, O20, O38, O39, L9, L6
Écart de création technologique entre la Chine et l’Afrique
Authors: Mpabe Bodjongo Mathieu Juliot , Keneck-Massil Joseph 
Published: May 2017

Cet article fournit une analyse empirique des facteurs explicatifs de l’écart de création technologique entre la Chine et les pays africains. L’analyse porte sur un échantillon de 8 pays africains, plus la Chine, et couvre la période 1995-2012. En utilisant les données du LEAD (2014) et Heritage Foundation (2014), il apparaît qu’en moyenne les pays africains accusent un retard en matière de création d’innovations par rapport à la Chine. Les résultats économétriques obtenus à l’aide d’une analyse en données de panel montrent que la corruption, les infrastructures technologiques et le capital humain expliquent ce retard. Code JEL : O30, O57, N70
Système National de Recherche et d’Innovation en Afrique : le cas du Cameroun
Authors: Temple Ludovic , Machicou Ndzesop Nadine , Fongang Fouepe Guillaume Hensel , Ndoumbe Nkeng Michel , Mathé Syndhia 
Published: May 2017

La transition sociodémographique des pays du sud structure les marchés intérieurs et crée des opportunités de croissance économique. En mobilisant le concept de Système National de Recherche et d’Innovation, nous testons en quoi il améliore la connaissance des conditions institutionnelles qui mobilisent les résultats de la recherche dans les processus d’innovation. Une première partie discute de l’adaptation de la notion de Système National d’Innovation aux pays du Sud. Une seconde partie caractérise les conditions historiques d’émergence des institutions de recherche au Cameroun. Une troisième partie analyse en quoi la structure de la production scientifique depuis 1991 répond aux besoins d’innovations du secteur agricole et alimentaire. La quatrième partie explicite les conditions d’utilisation de cette production par les sous-systèmes de l’intermédiation et de l’entrepreneuriat. Les résultats interrogent comment l’usage de la notion de SNRI peut devenir un élément d’orientation des politiques de recherche et d’innovation finalisées par le développement. Codes JEL : O3, O32, O38, D83, H5
La culture organisationnelle des multinationales françaises en Chine. Risque managérial de l’hybridation
Authors: Gao Huiyi , David Patricia 
Published: May 2017

Cet article cherche à appréhender l’évolution de la culture organisationnelle chinoise en prenant en considération deux dimensions suivantes : les impacts culturels du contexte dans lequel les organisations se situent d’une part, et d’autre part la dynamique des changements des contextes à la fois interne (niveaux individuel et organisationnel) et externe. Nous allons nous interroger sur les transformations éventuelles de la culture organisationnelle chinoise dans le cas d’une hybridation des cultures aux niveaux national, organisationnel ou individuel. Pour cela, nous allons mobiliser la théorie de crossvergence définie comme un processus dynamique basé sur la synergie de différents éléments : l’évolution des valeurs et des comportements résultant de l’interaction entre les influences socio-culturelles et les influences de l’idéologie économique. Pour apporter des premiers éléments de réponse concernant l’évolution de la culture organisationnelle au sein des firmes chinoises, nous présenterons les premiers résultats d’une enquête réalisée dans quatre multinationales françaises en Chine. Ils illustrent l’émergence d’une « culture particulière » synthétisant les forces internes et externes de l’organisation influencée par le contexte culturellement hybride. Notre objectif final vise l’identification des risques managériaux, souvent occultés, liés au processus de l’hybridation conceptuelle dans tel ou tel contexte culturel.