31 research outputs found

    Bolivian Marmosops

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    40 p. : ill., maps ; 26 cm.Electronic version available in portable document format (PDF).Includes bibliographical references (p. 34-37).In order to facilitate much-needed revisionary research on Marmosops, we summarize the currently accepted species-level taxonomy, provide full bibliographic citations for original descriptions of all 36 included nominal taxa, map their type localities, and list their type material (if known). We rediagnose the genus Marmosops, compare it with three other didelphid genera to which misidentified specimens of Marmosops have often been referred, and review the phylogenetic evidence that Marmosops is monophyletic. After describing a new species from the eastern-slope montane forests of Bolivia, we review the taxonomy of other Bolivian congeners based on morphological characters and published cytochrome-b gene sequences. Among our taxonomic results, we synonymize albiventris Tate (1931), dorothea Thomas (1911), and yungasensis Tate (1931) with M. noctivagus (Tschudi, 1845). By contrast, M. ocellatus (Tate, 1931), currently considered a synonym of dorothea, appears to be a valid species. Whereas published range maps of Bolivian species of Marmosops are demonstrably based on misidentified material and show little correspondence with known environmental factors, locality records based on specimens examined for this report make much more ecogeographic sense

    Répondre aux besoins spécifiques de qualité pour augmenter l’utilisation des légumineuses en transformation industrielle

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    Connus depuis longtemps dans la cuisine européenne, les légumes secs sont aussi de plus en plus transformés industriellement dans le but d’offrir de nouveaux ingrédients et matières premières à l’alimentation humaine et animale. Cet article décrit les principaux procédés industriels appliqués et met en évidence les attentes de ces industries notamment en terme d’approvisionnement (une filière sûre et tracée), de performance (caractéristiques de graines appropriées) et d’image. Une réelle opportunité de valorisation industrielle des légumineuses d’une filière française durable peut être saisie. Une approche intégrée de la filière la rendra possible.Known and used since ages in European cuisine, pulses are more and more industrially processed in order to offer new ingredients and raw materials to food and feed sectors. This article describes the major industrial processes used and highlights the needs of these industries, especially in terms of supply and safety, performance and image. Industrial valorization of dry legumes is a clear opportunity for French agriculture. An integrated approach should make it possible

    Photopotential Imaging on Functionalized Surfaces Dedicated to Label-Free Detection of Biomolecular Interactions

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    International audienceWe present a label-free biosensor capable to map local potential by photogenerating charge carriers in a field effect device. It consists in an amplitude-modulated laser beam scanning through an electrolyte/insulator/semiconductor structure at very low illumination around the equilibrium state of semiconductor. A proof of principle is demonstrated by depositing a self-assembled monolayer on the dielectric and by showing a clear photopotential change between naked and covered areas

    Hedge fund transparency: where do we stand?

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    Unlike mutual funds, hedge funds are reluctant to provide detailed information on their investment portfolios. Since hedge funds may use niche investment strategies in narrow market segments, fund managers portend that thorough disclosure of their portfolio holdings—which are important to assessing future returns—would crowd out their trades, thus decreasing opportunities to generate outsized returns. However, incomplete disclosure can have some undesirable side effects. It might encourage hedge fund managers to take positions that are riskier than provided for by the manager’s mandate. Investors even risk fraudulent behavior, since the action of hedge fund management may be detected only when a fund has failed.This article presents the results of a comprehensive survey of hedge fund managers and investors on current hedge fund reporting practices. The authors find that the quality of hedge fund reporting is considered an important investment criterion. In analyzing the spectrum of opinions, the authors identify critical points of conflict between investors and managers.They find that investors are especially dissatisfied with the quality of information on liquidity and operational risk exposure. The survey also reveals that inappropriate performance measures are prevalent
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