1,721,048 research outputs found
Tremblay E. C. — Croître ou mourir
No full textG A. Tremblay E. C. — Croître ou mourir. In: Population, 13ᵉ année, n°2, 1958. p. 315
Taxonomic status of some species of the genus Praon Haliday (Hymenoptera, Braconidae, Aphidiinae)
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Final results of mass captures of citrophilus mealybug males (Pseudococcus calceolariae Mask.) (Homoptera, Coccoidea) in a citrus grove.
No full textPseudococcus calceolariae, mass captures, citrus grov
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Regulation of Heliothis virescens (F.) development and hormonal metabolism by the endophagous parasitoid Cardiochiles nigriceps Viereck: The role of teratocytes
No full textRegulation of Heliothis virescens (F.) development and hormonal metabolism by the endophagous parasitoid Cardiochiles nigriceps Viereck: The role of teratocytes
No full textAnalisi e caratterizzazione di proteine sintetizzate dai teratociti del braconide Aphidius ervi (Hymenoptera: Braconidae).
No full textHost regulation by the aphid parasitoid Aphidius ervi: the role of teratocytes.
No full textThe biochemical profile and metabolism of Acyrthosiphon pisum (Harris) (Homoptera, Aphididae) are markedly altered and redirected in response to parasitization by the endophagous braconid Aphidius ervi Haliday (Hymenoptera,
Braconidae). In the present study, the role played in the host regulation process by teratocytes, cells deriving from the dissociation of the embryonic membrane of the parasitoid, is taken into consideration. The protein synthesis activity of these cells of embryonic origin is analysed in vitro and an essential characterization of those proteins de novo synthesized and released in the incubation medium is provided. Teratocytes, obtained by
dissecting parasitized host aphids, 3, 4 and 5 days after parasitoid oviposition, were incubated in vitro and, at the
end of the incubation period, were separated from the medium for SDS-PAGE analysis of both cellular and secreted
proteins. Various cellular proteins were more abundant as the time between parasitization and teratocyte collection
increased. Furthermore, two proteins, showing an approximate molecular mass of 15 kD (p15) and 45 kD (p45) respectively, were abundantly secreted in the incubation medium by 5 day-old teratocytes. Incubations in presence of 35S radiolabelled amino acids indicated that p15 and p45 are both synthesized by A. ervi teratocytes. The aminoacid composition of these two proteins was similar to that reported for other insect proteins with a demonstrated nutritional function. The p45 protein was found to be glycosylated. A tentative physiological model describing the host regulation role played by different parasitoid-derived factors is proposed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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