1,720,965 research outputs found
Solubility and emulsifying properties of aqueous extracts and protein concentrate from African palm weevil larvae
No full textEtude de quelques propriétés nutritionnelles de trois insectes consommés au Cameroun en vue de leur valorisation alimentaire: Rhynchophorus phoenicis, Imbrasia truncata et I. epimeathea
No full textEvaluation des caractéristiques nutritionnelles et de l’aptitude à la transformation d’insectes consommés au Cameroun
No full textAdsorption Isotherms and Isosteric Heat (qst) of the flours from three Edible Insects: Rhynchophorus phoenicis, Imbrasia truncata and Imbrasia epimethea
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Moisture Adsorption Isotherms, Thermodynamic Properties and Estimated Maximum Storage Time of Flours of Rhynchophorus Phoenicis and Imbrasia Truncata Larvae
No full textInternational audienceTo evaluate the storage stability of flours from Rhynchophorus phoenicis and Imbrasia truncata larvae obtained by freeze-drying, their moisture adsorption isotherms have been determined at 20, 30 and 40 °C and their thermal properties explored by differential scanning calorimetry (DSC). DSC evidenced reversible transitions attributed to lipid melting/crystallization between − 60 and 90 °C. The GAB model was chosen to model adsorption isotherms. It evidenced 2 and 3 water compartments in R. phoenicis and I. truncata flours, respectively. Adsorption isotherm of R. phoenicis is type III at 20 and 30 °C, while that of I. truncata is type II at 20, 30 and 40 °C. GAB model also allowed calculating flour monolayer moisture contents (Mo ≤ 5.6 g/100 g dry matter (DM)). Net isosteric heat (qst) was evaluated. qst decreases with increase of water content and was higher for the flour of I. truncata larvae (from 8571 to 503 J/mol; 2,5 to 20 g/100 g DM) than that of R. phoenicis larvae (from 1750 to 124 J/mol; 5 to 30 g/100 g DM). Finally, the maximum storage times of the insect flours under typical packaging and storage conditions were estimated according to the Heiss and Eichner model. Highest for the flour of I. truncata, qst remained however moderate indicating that the insects can be dried without important energy supply. The estimated storage time of R. phoenicis larvae and I. truncata flours (3 g/100 g DM), stored at 20 °C in polyethylene bags, could reach 263 (8 months and 19 days) and 116 days (3 months and 24 days), respectively. These results provide valuable insights into the stability and potential applications insect flour in the food processing industry. This information could help in determining suitable packaging methods and storage conditions to maintain the quality and shelf life of products containing these flours to set safety and quality standards for such products
Evaluation des caractéristiques nutritionnelles et de l’aptitude à la transformation d’insectes consommés au Cameroun
No full textEdible caterpillars of Imbrasia truncata and Imbrasia epimethea contain lipids and proteins of high potential for nutrition
No full textInternational audienceImbrasia truncata and L epimethea caterpillars were evaluated as dietary protein and lipid sources. They contained approximately 7.0 g/100 g fresh weight (FW) of lipids and 20.0 g/100 g FW of proteins calculed with determined nitrogen to protein conversion factors: 6.01 +/- 0.21 and 6.27 +/- 0.15 for L truncata and I. epimethea, respectively. Unsaturated fatty acids represented about 2.63 +/- 0.21 g/100 g FW for L truncata and 3.24 +/- 0.21 g/100 g FW for L epimethea, with alpha-linolenic acid as major fatty acid (around 1.88 +/- 0.15 g/100 g FW for I. truncata 2.17 +/- 0.13 g/100 g FW for I. epimethea) and very low n-6/n-3 ratios: 0.15 (I. truncata) and 0.27 (I epimethea). Polar lipids (phospholipids and glycolipids + sulfolipids), representing between 4 and 6% of lipids, contained little amounts of arachidonic acid (C20:4n-6). The major tocopherol isomer was alpha-tocopherol in L truncata (0.52 +/- 0.08 g/100 g FW) and gamma-tocopherol in L epimethea (1.00 +/- 0.08 g/100 g FW). The proteins of both insect included all indispensable amino acids at amounts (mg/g protein) higher than the indispensable amino acid requirement patterns recommended by WHO/FAO/UNU (2007). In conclusion, Imbrasia caterpillars exhibit a great nutritional potential due to the presence of good quality proteins and healthy fa
Aptitude au stockage d’un insecte comestible : isotherme d’adsorption et chaleur isostérique de Rhynchophorus phoenicis
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
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