51 research outputs found

    The Crystal Structure of (2,3,9,10-tetramethyl-1,4,8,11-tetraaza- 1,3,8, 10-cyclotetradecatetraene )copper(II) Tetraphenylborate

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    The crystal structure (P21/c, a = 1199.7(2), b = 1304.2(4), c = = 1639.1(4) pm, beta = 102.10(1) 0 (J.. MoKa = 71.069 pm), Z = 2) of this compound, [CuC14H24N4] [B(C5Hs)4]2, has been determined from diffractometer x-ray data and refined by least-squares to R = 0.055 and Rw = 0.037. The CuTIM cation, planar except for two methylene groups, is one of the rare cases of planar four-coordinate copper(II), although the apical regions of the coordination sphere are occupied by the centers of phenyf groups from two tetraphenylborate ions. The tetraphenylborate ion has a normal conformation which deviates slightly, but significantly, from S4 symmetry

    (—)-3-(1-Phenylpropyl)-4-hydroxycoumarin

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    The title compound [generic name: (—)-phenprocoumon], C18H16O3, monoclinic, P21. Z = 4 with two molecules/asymmetric unit, a= 7·171 (1), b = 17·751 (5), c = 11·752 (2) Å, β = 92·58 (2)°, V = 1494 Å3, Dc = 1·28, d0 = 1·30 (2) g cm-3 is pseudoisostructural with the crystalline racemate as suggested by a similarity in cell constants and symmetry. Structural differences involve small translations and where the racemate crystal contains layers of (—) and layers of (+) enantiomers, the (—) crystal contains one layer nearly identical with the (—) layer in the racemate while the 01olecules in the other layer adopt a different conformation so that packing is similar to that in the (+) layer of the racemate. Already high thermal motion in the racemate is dramatically increased in the enantiomeric structure which has a larger cell volume. Hydrogen bonding occurs along the a direction with O···O distances of 2·617 (5) and 2·587 (6) Å. The final R is 0·094 on 3060 counter-collected data

    The Crystal Structure of (2,3,9,10-tetramethyl-1,4,8,11-tetraaza- 1,3,8, 10-cyclotetradecatetraene )copper(II) Tetraphenylborate

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    The crystal structure (P21/c, a = 1199.7(2), b = 1304.2(4), c = = 1639.1(4) pm, beta = 102.10(1) 0 (J.. MoKa = 71.069 pm), Z = 2) of this compound, [CuC14H24N4] [B(C5Hs)4]2, has been determined from diffractometer x-ray data and refined by least-squares to R = 0.055 and Rw = 0.037. The CuTIM cation, planar except for two methylene groups, is one of the rare cases of planar four-coordinate copper(II), although the apical regions of the coordination sphere are occupied by the centers of phenyf groups from two tetraphenylborate ions. The tetraphenylborate ion has a normal conformation which deviates slightly, but significantly, from S4 symmetry

    A new species of Eclipta Bates, 1873 from Brazil (Coleoptera, Cerambycidae) in honor of the late Ubirajara Ribeiro Martins de Souza

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    A new species of Eclipta Bates, 1873 from Brazil (São Paulo), E. birai, is described and illustrated. A tribute to the late Ubirajara Ribeiro Martins de Souza is provided

    Preimaginal Stages of the Emerald Ash Borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae): An Invasive Pest on Ash Trees (Fraxinus)

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    This study provides the most detailed description of the immature stages of Agrilus planipennis Fairmaire to date and illustrates suites of larval characters useful in distinguishing among Agrilus Curtis species and instars. Immature stages of eight species of Agrilus were examined and imaged using light and scanning electron microscopy. For A. planipennis all preimaginal stages (egg, instars I-IV, prepupa and pupa) were described. A combination of 14 character states were identified that serve to identify larvae of A. planipennis. Our results support the segregation of Agrilus larvae into two informal assemblages based on characters of the mouthparts, prothorax, and abdomen: the A. viridis and A. ater assemblages, with A. planipennis being more similar to the former. Additional evidence is provided in favor of excluding A. planipennis from the subgenus Uragrilus

    Detroit's East Side Village Health Worker Partnership: Community-Based Lay Health Advisor Intervention in an Urban Area

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    In recent years, there have been few reports in the literature of interventions using a lay health advisor approach in an urban area. Consequently, little is known about how implementation of this type of community health worker model, which has been used extensively in rural areas, may differ in an urban area. This article describes the implementation of the East Side Village Health Worker Partnership, a lay health advisor intervention, in Detroit, Michigan, and notes how participatory action research methods and principles for community-based partnership research are being used to guide the intervention. Findings are presented on how the urban context is affecting the design and implementation of this intervention. Implications of the findings for health educators are also presented and include the utility of a participatory action research approach, the importance of considering the context and history of a community in designing a health education intervention, and the importance of recognizing and considering the differences between rural and urban settings when designing a health education intervention.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67390/2/10.1177_109019819802500104.pd

    Cadophora margaritata sp. nov. and other fungi associated with the longhorn beetles Anoplophora glabripennis and Saperda carcharias in Finland

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    Symbiosis with microbes is crucial for survival and development of wood-inhabiting longhorn beetles (Coleoptera: Cerambycidae). Thus, knowledge of the endemic fungal associates of insects would facilitate risk assessment in cases where a new invasive pest occupies the same ecological niche. However, the diversity of fungi associated with insects remains poorly understood. The aim of this study was to investigate fungi associated with the native large poplar longhorn beetle (Saperda carcharias) and the recently introduced Asian longhorn beetle (Anoplophora glabripennis) infesting hardwood trees in Finland. We studied the cultivable fungal associates obtained from Populus tremula colonised by S. carcharias, and Betula pendula and Salix caprea infested by A. glabripennis, and compared these to the samples collected from intact wood material. This study detected a number of plant pathogenic and saprotrophic fungi, and species with known potential for enzymatic degradation of wood components. Phylogenetic analyses of the most commonly encountered fungi isolated from the longhorn beetles revealed an association with fungi residing in the Cadophora-Mollisia species complex. A commonly encountered fungus was Cadophora spadicis, a recently described fungus associated with wood-decay. In addition, a novel species of Cadophora, for which the name Cadophora margaritata sp. nov. is provided, was isolated from the colonised wood.Peer reviewe

    Aqueous Solutions of Paraffin-Chain Salts.

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