Rosemary distillation residues reduce lipid oxidation, increase alpha-tocopherol content and improve fatty acid profile of lamb meat

The experiment studied the effects of rosemary distillation residues (RR) intake on lamb meat quality, oxidative stability and fatty acid (FA) profile. Barbarine lambs of Control group were fed 600 g of hay, which was substituted by 600 g of pellets containing 60 and 87% of RR for RR60 and RR87 groups; all animals received 600 g of concentrate. Meat protein and fat content was similar for 3 treatments. Lipid oxidation was strongly reduced with RR diets. Both RR diets resulted in a higher a- tocopherol content in muscle. The metmyoglobin and deoxymyoglobin percentages were similar for all groups; however oxymyoglobin was higher for RR groups. The saturated (SFA) and unsaturated FAs (UFA) were unaffected by the diets. However, the PUFA, n-6 and n-3 were higher for RR groups. In conclusion, rosemary residues resulted in higher vitamin E content, so it enhanced the oxidative status and improved the fatty acid profile of lamb meat

Effects of using rosemary residues as a cereal substitute in concentrate on vitamin e, antioxidant activity, color, lipid oxidation, and fatty acid profile of barbarine lamb meat

The shortage of some ingredients and, consequently, the continuous increase in the price of feed encourage the search for other alternatives to maintain animal production and enhance its products. In this line, the use of aromatic plant by-products in animal diet has been recently and widely considered, given their richness in bioactive compounds. Therefore, the aim of this study was to investigate the effects of the inclusion of rosemary residues (RR) and protein sources on lamb meat quality. The experiment was carried out on 24 male Barbarine lambs (3 months old) with an average body weight (BW) of 17.8 ± 2.6 kg, which were divided into three homogeneous groups according to BW. The diet comprised 600 g of oat hay and 600 g of concentrate. Three types of concentrate were evaluated: commercial concentrate as the control group (C); rosemary residues (RR) plus soybean meal as the RRS group, and RR plus faba bean as the RRF group. After an experimental period of 65 days, lambs were slaughtered. The inclusion of RR in both concentrates increased the a-tocopherol and total polyphenol content in meat and protected meat against discoloration (high red index and chroma after 9 days of storage) but did not affect meat lipid oxidation, which was similar for all groups. The FA profile was affected by the inclusion of RR, with no effect from the source of protein (faba bean or soybean). The inclusion of RR in the concentrate increased the C18:2 n-6, C18:3n-3, C20:4 n-6, C20:5 n-3, and C22:5 n-3 content (p < 0.05). Consequently, the inclusion of RR also increased the total polyunsaturated FA (p < 0.05) and the ratio of polyunsaturated FA to saturated FA (p < 0.05). The results of this study demonstrate that concentrate based on RR could be useful for lamb meat production by improving the nutritional quality of meat, especially the fatty acid profile. In addition, soybean meal can be replaced by faba bean in lamb concentrate without affecting meat quality. © 2021 by the authors. Licensee MDPI, Basel, Switzerland

Collaborations chercheurs-praticiens pour soutenir la transformation pédagogique de l'enseignement supérieur : à quelles conditions ?

L’institutionnalisation de la pédagogie de l’enseignement supérieur ravive d’anciens débats sur le rôle et de la place des sciences de l’éducation et de la formation dans le champ des pratiques sociales. En s’appuyant sur l’expérience d’un projet « Nouveaux Cursus à l'Université », cet atelier vise à repérer les conditions d’une collaboration optimale entre chercheurs et praticiens. Il s’adresse, dans la limite des places disponibles (20 max.), à toutes les personnes qui sont impliquées, ou qui le souhaiteraient, dans des projets de transformation pédagogique de l’enseignement supérieur. Les pistes co-construites seront partagées avec l’ensemble des participants qui pourront les mettre en œuvre dans leur contexte professionnel

Fatty Acid and Multi-Isotopic Analysis (C, H, N, O) as a Tool to Differentiate and Valorise the Djebel Lamb from the Mountainous Region of Tunisia

The objective of this study was to distinguish between the Tunisian Djebel lamb meat and meat from typical Tunisian production systems (PSs) through the fatty acids (FAs) profile and the stable isotope ratio analysis (SIRA). Thirty-five lambs from three different regions and PSs (D = Djebel, B = Bou-Rebiaa, and O = Ouesslatia) were considered for this purpose. The results demonstrated that the PS and the geographic origin strongly influenced the FA profile of lamb meat. It was possible to discriminate between the Djebel lamb meat and the rest of the dataset thanks to the quantification of the conjugated linoleic acids (CLA) and the branched chain FAs. Moreover, statistically different concentrations of saturated, monounsaturated and polyunsaturated FAs and a different n-6/n-3 ratio were found for grazing (D and BR) and indoor (O) lambs, making it possible to discriminate between them. As for the stable isotope ratio analysis, all parameters made it possible to distinguish among the three groups, primarily on the basis of the dietary regimen (δ(13C) and δ(15N)) and breeding area (δ(18O) and δ(2H))

Adaptive capacity of Mediterranean sheep over morphological traits at different physiological status (póster)

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Ostéosarcome à localisation rare : apport de l’imagerie

L’ostéosarcome primaire de la colonne vertébrale  est une tumeur rare. L’ostéosarcome représente environ 3 à  5%  des tumeurs ostéogéniques et 4 à 14 % des tumeurs de la colonne vertèbre.  L’atteinte cervicale survient de façon générale chez les sujets jeunes (10 à 25 ans) avec un mauvais pronostic. Nous rapportons  le cas d’une fillette de 12 ans présentant une tuméfaction cervicale droite avec limitation de la mobilité. Le diagnostic a été possible à l’aide de l’imagerie (scanner et IRM) en mettant en évidence un processus tumoral expansif ostéolytique de l'arc postérieur de C5 d’allure maligne étendue aux corps vertébraux de  C4 et C5 avec envahissement des parties molles cervicales et comprimant le canal médullaire en regard évoquant un ostéosarcome cervicale qui a été confirmé  histologiquement. L’imagerie médicale  reste un moyen incontournable dans la prise en charge diagnostique et dans le suivi post thérapeutique de l’ostéosarcome

SEC with UV and ELSD detection for analysis of gamma-irradiated PS-radiation-grafted P(VDF/HFP) films

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