1,720,958 research outputs found
Quality criteria of freshness, morphological species recognition and risk for human food consumption of the species belonging to the order Scorpaeniformes
No full textIntroduction
Order Scorpaeniformes includes thousand species, they are marketed fresh, frozen, filleted. In Italy gurnard are fished for a total of 1579 t (2005). The rockfish are caught in smaller quantities due to overfishing and a slow growth of young fish. Aim of the study is to identify characteristics of recognition (RC) and freshness (FC), as well as the possible risks for human consumer of the species belonging to the Scorpaeniformes present on the Italian market.
Materials and methods
Ten species are identified and high-resolution photographed.
Results and Discussion
FC gurnard and northern rockfish fall within the group of white fish in the Reg. CE 2406/96 that describes the caratteristics of freshness, in this norm are given the minimum marketing sizes for gurnard. The Reg. CE 2074/2005 fixed volatile basic nitrogen (TVB-N) for Sebastes spp., Helicolenus dactylopterus to 25 mg of nitrogen/100 g of meat. In a study by Hilling et al. (1960) have measured 1.06 mg/100 g TVB-N in Sebastes sp. after 2.4 days of ice storage and was estimated levels of 36.6 mg/100 g TVB-N to 14 days of ice storage. For Sebastes marinus and Chelidonishthys lucernus has been developed a Quality Index Method (QIM), that estimated a shelf life at 16 - 19 days at 4-5 ° C of storage. RC: Scorpaeniformes species have some peculiarities that make them identifiable, in doubtful cases are available Isoeletrophoretic tracks. Fraud for substitution between gurnard and pangasius has made it important the recognition of the fillet as described recently by Malandra and Coll. Finally there is two types of risks for human consumer, the first risk is represented by Anisakis sp. (16% of prevalence in Trigla lira ), second type of risk is the presence of heavy metal (mercury) in redfish that exceeds the limits imposed by Reg CE 1881/2006
Quality criteria of freshness and anatomical-morphological characters distinguishing the species belonging to the family Carangidae
No full textIntroduction
The traceability of fishery products imposes a precise identification of fish species to trade. The morphological identification of fishery products is generally practiced on whole fish applying the identification keys proposed by FAO.
Scope
The objective of this paper is describe the characteristics of freshness common to the species of the family "Carangidae" and those specific to certain species in particular. Also I want to give accurate information on how to recognize and morphological identification of different species and different genres that make up the family "Carangidae" emphasizing some of the features that allow to investigate potential fraud replacement.
Materials and methods
The camera used is a camera "Canon EOS20" with 18-55 mm lens.
I performed a radiographic study for the highlight of the spine and other bony structures.
Results
Carangidae have 2 dorsal fins and the ventral fin in thoracic position. The body shape is extremely variable, present the caudal peduncle depending on the species or a lateral fairing moderately showy and dorsal and ventral grooves. The lateral line is more or less curved anteriorly and posteriorly straight up the base of the caudal fin. Some species have prominent badges that are bigger chips, thick and sometimes sharp on the lateral line. In this work I evidence that a radiologic image of spine can identify a Seriola dumerili (total vertebral number: 24) from Seriola lalandi (25): it is a non-invasive technique.
The official method for the sensory evaluation of freshness of fish products is governed by EC Regulation 2406 / 96 that divides the fish into 4 categories (Extra, A, B and unsuitable) according to their degree of freshness.
With Quality Index Method (QIM) you can get an estimate of the remaining shelf-life because it is linearly related to the storage time of fresh fish on ice
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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