1,721,017 research outputs found
Figs 8–11 in Exotic ants (Hymenoptera: Formicidae) of Cambodia
No full textFigs 8–11. Exotic ants in Cambodia (continued). 8 – Solenopsis geminata; 9 – Tetra-Published as part of Hosoishi, S., Rahman, Md M. & Heng, S., 2022, Exotic ants (Hymenoptera: Formicidae) of Cambodia, pp. 15-24 in Far Eastern Entomologist 460 on page 19, DOI: 10.25221/fee.460.3, http://zenodo.org/record/716688
Fig 1 in Exotic ants (Hymenoptera: Formicidae) of Cambodia
No full textFig 1. Map of the collecting locality.Published as part of Hosoishi, S., Rahman, Md M. & Heng, S., 2022, Exotic ants (Hymenoptera: Formicidae) of Cambodia, pp. 15-24 in Far Eastern Entomologist 460 on page 17, DOI: 10.25221/fee.460.3, http://zenodo.org/record/716688
Figs 2–7 in Exotic ants (Hymenoptera: Formicidae) of Cambodia
No full textFigs 2–7. Exotic ants in Cambodia. 2 – Iridomyrmex anceps; 3 – Tapinoma melanoce-Published as part of Hosoishi, S., Rahman, Md M. & Heng, S., 2022, Exotic ants (Hymenoptera: Formicidae) of Cambodia, pp. 15-24 in Far Eastern Entomologist 460 on page 18, DOI: 10.25221/fee.460.3, http://zenodo.org/record/716688
Fluttuazioni delle comunità microbiche nelle fasce tampone
No full textIl presente studio è parte integrante di un approccio interdisciplinare relativo ad una fascia tampone alberata specificamente progettata per l’abbattimento del contenuto di azoto nelle acque del fiume Zero. Lo studio della biodiversità microbica, associato ai risultati ottenuti da altri ricercatori sullo stesso sistema artificiale, ha consentito di stabilire se gli interventi di soil management operati sul sito sperimentale si siano rivelati adeguati. Dai risultati ottenuti è stato possibile stabilire un nesso chiaro tra la dinamica delle popolazioni microbiche nei diversi strati di suolo ed il positivo funzionamento dell’intero sistema allestito. Facendo uso di metodi avanzati DNA-based è stato possibile inoltre seguire le fluttuazioni dell’intera comunità microbica, compresa quella non coltivabile. I dati indicano chiaramente che attraverso l’analisi microbica è possibile ricavare una significativa fotografia dell’ecosistema suolo/acque che si realizza a seguito di specifici interventi di soil management
Microbial diversity and denitrification in a wooded riparian strip
No full textThis study is part of a project aimed at verifying the potential of a specifically assessed wooded riparian zone in removing excess of combined nitrogen from the Zero river flow for the reduction of nutrient input into Venice Lagoon. General objectives of this project were to increase knowledge on the processes which allow the riparian strips to act as a buffer and to identify the most appropriate management strategies in order to maximize the efficiency of these systems in supporting the microbial activities involved in the process. For this purpose, specific objectives were pursued to determine seasonal fluctuations of the microbial populations in the soil/water of the wooded riparian strip. The bacterial communities were determined by combined approaches involving cultivation, microscopic approaches and DNA bases techniques to characterize both colturable and total microbial community inside and outside the riparian strip.
ARDRA and DGGE analyses of soil, collected at different depths, showed a clear decrease of the microbial diversity in deeper horizons as compared to the medium depth and surface ones. A comparison between this soil and that collected from an undisturbed zone external to the riparian strip, indicated that this effect can be also observed in the external area, although higher microbial diversity was always present in the internal soil. DGGE cluster analysis and PCA of both genetic and chemical properties of water samples, indicated that the bacterial populations present at the drainage ditches are rich in denitrifiers as a result of a mixing of bacterial communities carried by the Zero river flux and those already present in the soil of the riparian strip.
Taken together, the overall results confirm what it was demonstrated by other chemical-physical analysis: the wooded riparian buffer zone assessed for water remediation (nitrogen removal from the river) is effectively working as a result of the special conditions there produced to support the work of specific microbial populations. The microbiological analysis here accomplished can also contribute to understand the bacterial population dynamic of an agricultural soil when transformed in a wooded strip and to provide key indications for the management of a phytoremediation site
The use of nirK gene for the evaluation of a buffer strip assessed for enhancing denitrification
No full textSpecific soil microbial populations and activities could be promoted by suitable manipulation of the
environment they live in. If correctly applied such an approach could become a very effective way
to remediate excess of chemicals. The concentration of nitrogen, especially nitrate deriving from
agricultural managements, is generally found to increase in water flow. Therefore, by forcing the
water flow through a buffer strip specifically designed and possibly afforested with suitable plant
species, may result effective in reducing high nitrogen contents. The management of a riparian
buffer may definitely affect the soil microbial activities, including denitrification, as well as the
composition of the community.
The present study reports on the changes occurred in terms of denitrifying microbial community
composition, as compared to that of a neighbouring agricultural area, as a consequence of hydraulic
management coupled to the suspension of farming practices and to the development of the woody
and herbaceous vegetation.
With this aim, denitrification was constantly measured and the data obtained were related to those
deriving from a specific analysis of the soil community composition performed both as a general
bacterial population survey and as a direct determination of specific bacterial groups involved in
denitrification. nirK, encoding for nitrite reductase, an enzyme essential for the conversion of nitrite
to nitric oxide and considered the key step in the denitrification process, was choosen as the target
gene
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
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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