1,721,099 research outputs found
Beta-ionone increases catches of Lasioderma serricorne (F.) (Coleoptera: Anobiidae) in traps baited with sex pheromone
No full textThe cigarette beetle, Lasioderma serricorne (F.) (Coleoptera: Anobiidae), is an important stored product pest increasingly impacting museums and herbaria. Monitoring methods make use of pheromone traps which can be implemented using chili fruit powder as food attractant. Further laboratory studies evidenced that the main cues involved in this attraction are the terpenoids alpha-ionone and beta-ionone. In this study a trap bioassay was carried out in a bread plant with pheromone traps added with alpha-ionone or beta-ionone at different doses to evaluate the possible enhance of captures determined by such odorants in comparison with traps loaded with the synthetic pheromone alone. Furthermore, in order to optimize the type of device used, the chemical that elicited the highest performance was tested using two types of dispenser: a polyethylene and a silicone one. The results indicated that pheromone traps with the addition of beta-ionone at the dose of 10 mg captured the highest amount of L. serricorne adults and significantly more than traps loaded with pheromone alone or with pheromone plus alpha-ionone. Differently, captures of pheromone traps supplemented with alpha-ionone didn't differ statistically from those baited solely with the synthetic pheromone. Moreover, the traps baited with beta-ionone loaded in polyethylene dispenser allowed a higher number of catches of the adults of the beetle in comparison with those obtained using silicone dispenser. Data indicate that this co-attractant can be exploited to increase sensitivity for monitoring, and/or for mass trapping L. serricorne adults
Effectiveness of a novel insect-repellent food packaging incorporating essential oils against the red flour beetle (Tribolium castaneum)
No full textPackaging represents a critical step in the food quality preservation and the ultimate defence against insect pests. Cereal-based foods may be infested by insects even during their packed life, i.e. during distribution, transportation and storage in warehouses or in retail stores. Many studies in the last years have concerned the development of active packaging with antioxidant and antimicrobial action, but very few studies have addressed insect-repellent packaging materials for foods. This work aimed at assessing the repellent efficacy of novel functional packaging materials containing three essential oils: citronella, oregano and rosemary. Repellent films were chemically characterized by MHS-SPME-GC-MS. The results obtained from area tests run in Petri dishes indicated that essential oils at concentrations higher than 0.005 μL/cm2 showed potential in terms of repellent activities against the red flour beetle, Tribolium castaneum. Assays performed with coated packages containing wheat semolina showed repellency results ranging from 53 to 87% for citronella and rosemary, respectively.
Industrial Relevance: The paper deals with the study carried out of several Essential Oils as repellent for insects in packaged food. Rejection of packaged food caused by insect pests is a great problem that affects the industry worldwide. Without any doubt the prevention of insect attack from the packaging material without affecting the packaged product is an environmentally friendly and economical advantage. The industry is demanding this type of solutions
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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