267 research outputs found

    Penambahan Nutrisi Pada Tiga Varietas Melon Untuk Meningkatkan Hasil Dan Kualitas Buah [Nutrition in Addition to Improve the Tree Varieties of Melon and Fruit Quality]

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    Tujuan penelitian adalah untuk mengetahui interaksi antara penambahan nutrisi dan tiga varietas terhadap produksi dan kualitas buah melon dan untuk menentukan pengaruh penambahan nutrisi atau mengetahui respons varietas yang berbeda terhadap produksi dan kualitas buah melon. Penelitian ini dilakukan di lahan UPT Agrotekno Park, Universitas Jember, Indonesia mulai dari April sampai Juni 2014. Penelitian ini dirancang dengan Rancangan Acak Kelompok Faktorial 3x3, dengan tiga ulangan. Faktor pertama, penambahan nutrisi yang terdiri dari 0 g NPK + ZA 0 g, 1,5 g NPK + ZA 1,5 g, dan 3 g NPK + ZA 3 g. Faktor kedua, varietas melon terdiri dari varietas Glamour, Aromis dan Action 434. Data eksperimen dianalisis menggunakan analisis varians dan dilanjutkan dengan Duncan Multiple Range Test (DMRT) jika ada efek yang signifikan. Hasil penelitian menunjukkan bahwa interaksi antara gizi dan varietas berpengaruh nyata terhadap kadar gula buah dan vitamin C. Penambahan nutrisi berpengaruh terhadap pertumbuhan dan kualitas buah melon, dosis 3 g pupuk NPK + 3 g ZA menunjukkan dosis terbaik. Varietas berpengaruh nyata terhadap pertumbuhan dan kualitas buah melon dan varietas Glamour sebagai varietas terbaik

    Operatorial quantization of Born-Infeld Skyrmion model and hidden symmetries

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    The SU(2) collective coordinates expansion of the Born-Infeld\break Skyrmion Lagrangian is performed. The classical Hamiltonian is computed from this special Lagrangian in approximative way: it is derived from the expansion of this non-polynomial Lagrangian up to second-order variable in the collective coordinates. This second-class constrained model is quantized by Dirac Hamiltonian method and symplectic formalism. Although it is not expected to find symmetries on second-class systems, a hidden symmetry is disclosed by formulating the Born-Infeld Skyrmion %model as a gauge theory. To this end we developed a new constraint conversion technique based on the symplectic formalism. Finally, a discussion on the role played by the hidden symmetry on the computation of the energy spectrum is presented.Comment: A new version of hep-th/9901133. To appear in JP

    Gauging the SU(2) Skyrme model

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    In this paper the SU(2) Skyrme model will be reformulated as a gauge theory and the hidden symmetry will be investigated and explored in the energy spectrum computation. To this end we purpose a new constraint conversion scheme, based on the symplectic framework with the introduction of Wess-Zumino (WZ) terms in an unambiguous way. It is a positive feature not present on the BFFT constraint conversion. The Dirac's procedure for the first-class constraints is employed to quantize this gauge invariant nonlinear system and the energy spectrum is computed. The finding out shows the power of the symplectic gauge-invariant formalism when compared with another constraint conversion procedures present on the literature.Comment: revised version, to appear in Phys.Rev.

    Trends in ExPEC serogroups in the UK and their significance

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    We thank the British Society for Antimicrobial Chemotherapy for kindly providing E. coli bloodstream isolates from the BSAC Bacteraemia Resistance Surveillance Programme (2011), and all the staff at PHE’s Gastrointestinal Bacteria Reference Unit for their guidance and patience during the serogrouping process. This work was performed as part of a PhD study funded by PHE

    Wild Primate Populations in Emerging Infectious Disease Research: The Missing Link?

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    Wild primate populations, an unexplored source of information regarding emerging infectious disease, may hold valuable clues to the origins and evolution of some important pathogens. Primates can act as reservoirs for human pathogens. As members of biologically diverse habitats, they serve as sentinels for surveillance of emerging pathogens and provide models for basic research on natural transmission dynamics. Since emerging infectious diseases also pose serious threats to endangered and threatened primate species, studies of these diseases in primate populations can benefit conservation efforts and may provide the missing link between laboratory studies and the well-recognized needs of early disease detection, identification, and surveillance

    PSMA, EpCAM, VEGF and GRPR as Imaging Targets in Locally Recurrent Prostate Cancer after Radiotherapy

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    In this retrospective pilot study, the expression of the prostate-specific membrane antigen (PSMA), the epithelial cell adhesion molecule (EpCAM), the vascular endothelial growth factor (VEGF) and the gastrin-releasing peptide receptor (GRPR) in locally recurrent prostate cancer after brachytherapy or external beam radiotherapy (EBRT) was investigated, and their adequacy for targeted imaging was analyzed. Prostate cancer specimens were collected of 17 patients who underwent salvage prostatectomy because of locally recurrent prostate cancer after brachytherapy or EBRT. Immunohistochemistry was performed. A pathologist scored the immunoreactivity in prostate cancer and stroma. Staining for PSMA was seen in 100% (17/17), EpCAM in 82.3% (14/17), VEGF in 82.3% (14/17) and GRPR in 100% (17/17) of prostate cancer specimens. Staining for PSMA, EpCAM and VEGF was seen in 0% (0/17) and for GRPR in 100% (17/17) of the specimens’ stromal compartments. In 11.8% (2/17) of cases, the GRPR staining intensity of prostate cancer was higher than stroma, while in 88.2% (15/17), the staining was equal. Based on the absence of stromal staining, PSMA, EpCAM and VEGF show high tumor distinctiveness. Therefore, PSMA, EpCAM and VEGF can be used as targets for the bioimaging of recurrent prostate cancer after EBRT to exclude metastatic disease and/or to plan local salvage therapy

    Three-dimensional lanthanide-organic frameworks based on di-, tetra-, and hexameric clusters

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    Three-dimensional lanthanide-organic frameworks formulated as (CH3)2NH2[Ln(pydc)2] · 1/2H2O [Ln3+ ) Eu3+ (1a) or Er3+ (1b); pydc2- corresponds to the diprotonated residue of 2,5-pyridinedicarboxylic acid (H2pydc)], [Er4(OH)4(pydc)4(H2O)3] ·H2O (2), and [PrIII 2PrIV 1.25O(OH)3(pydc)3] (3) have been isolated from typical solvothermal (1a and 1b in N,N-dimethylformamide - DMF) and hydrothermal (2 and 3) syntheses. Materials were characterized in the solid state using single-crystal X-ray diffraction, thermogravimetric analysis, vibrational spectroscopy (FT-IR and FT-Raman), electron microscopy, and CHN elemental analysis. While synthesis in DMF promotes the formation of centrosymmetric dimeric units, which act as building blocks in the construction of anionic ∞ 3{[Ln(pydc)2]-} frameworks having the channels filled by the charge-balancing (CH3)2NH2 + cations generated in situ by the solvolysis of DMF, the use of water as the solvent medium promotes clustering of the lanthanide centers: structures of 2 and 3 contain instead tetrameric [Er4(μ3-OH)4]8+ and hexameric |Pr6(μ3-O)2(μ3-OH)6| clusters which act as the building blocks of the networks, and are bridged by the H2-xpydcx- residues. It is demonstrated that this modular approach is reflected in the topological nature of the materials inducing 4-, 8-, and 14-connected uninodal networks (the nodes being the centers of gravity of the clusters) with topologies identical to those of diamond (family 1), and framework types bct (for 2) and bcu-x (for 3), respectively. The thermogravimetric studies of compound 3 further reveal a significant weight increase between ambient temperature and 450 °C with this being correlated with the uptake of oxygen from the surrounding environment by the praseodymium oxide inorganic core

    Distribuição espacial de plantas daninhas resistentes a herbicidas no Brasil.

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    A ocorrência de plantas daninhas resistentes a herbicidas no Brasil tem sido um grande problema para os agricultores. O uso continuado de um mesmo herbicida resulta na seleção de biótipos resistentes ao princípio ativo e torna o manejo de plantas daninhas mais difícil, o que, por sua vez, pode gerar redução de produtividade. A confirmação da resistência demanda estudos em condições controladas, cujos resultados são divulgados em literatura especializada. Este trabalho teve por objetivo iniciar um levantamento de ocorrências comprovadas de plantas daninhas resistentes a herbicidas no Brasil, para posterior espacialização. Os trabalhos se iniciaram pela mais importante publicação nessa área, a revista Plantas Daninhas, da Sociedade Brasileira de Ciência das Plantas Daninhas, e abrangeram o período de 2000 a 2018. Foram publicados 36 artigos que descreviam plantas daninhas resistentes a herbicidas. As informações contidas nos artigos foram usadas para compor uma base de dados contendo informações sobre as plantas, os princípios ativos, o fator de resistência, os grupos de pesquisa, dados geográficos e agronômicos. Nesses artigos foram descritos 145 biótipos de plantas daninhas resistentes, pertencentes a 22 espécies e 12 gêneros. Os relatos descrevem a resistência a 14 princípios ativos. O herbicida mais frequente foi o glifosato, com 63 descrições. A maior parte dos biótipos resistentes foi encontrada no estado do Paraná, em seguida no Rio Grande do Sul, ocorrendo 68 e 50 relatos, respectivamente. Isso se deve, parcialmente, ao maior esforço de pesquisa realizado nesses estados
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