20 results on '"Agnès Thomas"'
Search Results
2. Dataset of lipids, antioxidative status and color attributes in cows meat from slaughter to storage: Impacts of diet supplementations and pre-slaughter stress
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Mylène Delosière, Agnès Thomas, Claudia E.M. Terlouw, Dominique Gruffat, Mihaela Habeanu, and Denis Durand
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Cows ,Diet ,Stress ,Meat ,Packaging ,Lipid ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Science (General) ,Q1-390 - Abstract
This data article presents a dataset with 34 values of the fatty acids composition and of indicators of lipid oxidation determined in the Longissimus dorsi and Semitendinosus from 71 Normand cull-cows at slaughter, after muscle aging and after meat storage periods under different packaging conditions. Cows were subjected to 3 feeding diets and 2 slaughter protocols relative to pre-slaughter stress. The indicators of lipids, FA composition, antioxidative enzymes activities, antioxidative status and global lipid oxidation of the muscles, and meat at different time points and under different aging and storage conditions, may be used to increase our understanding of the evolution of oxidation and consequences on color development. The last research article published on part of these data [1] is available for some interpretive insights: https://doi.org/10.1016/j.foodchem.2019.125668.
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- 2020
- Full Text
- View/download PDF
3. Filaggrin and filaggrin 2 processing are linked together through skin aspartic acid protease activation.
- Author
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Mark Donovan, Mélanie Salamito, Agnès Thomas-Collignon, Lucie Simonetti, Stephanie Desbouis, Jean-Christophe Rain, Etienne Formstecher, and Dominique Bernard
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Medicine ,Science - Abstract
Skin aspartic acid protease (SASPase) is believed to be a key enzyme involved in filaggrin processing during epidermal terminal differentiation. Since little is known about the regulation of SASPase function, the aim of this study was to identify involved protein partners in the process. Yeast two hybrid analyses using SASPase as bait against a human reconstructed skin library identified that the N-terminal domain of filaggrin 2 binds to the N-terminal fragment of SASPase. This interaction was confirmed in reciprocal yeast two hybrid screens and by Surface Plasmon Resonance analyses. Immunohistochemical studies in human skin, using specific antibodies to SASPase and the N-terminal domain of filaggrin 2, showed that the two proteins partially co-localized to the stratum granulosum. In vitro enzymatic assays showed that the N-terminal domain of filaggrin 2 enhanced the autoactivation of SASPase to its 14 kDa active form. Taken together, the data suggest that the N-terminal domain of filaggrin 2 regulates the activation of SASPase that may be a key event upstream of filaggrin processing to natural moisturizing factors in the human epidermis.
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- 2020
- Full Text
- View/download PDF
4. Changes in Digestive Microbiota, Rumen Fermentations and Oxidative Stress around Parturition Are Alleviated by Live Yeast Feed Supplementation to Gestating Ewes
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Lysiane Dunière, Damien Esparteiro, Yacine Lebbaoui, Philippe Ruiz, Mickael Bernard, Agnès Thomas, Denys Durand, Evelyne Forano, and Frédérique Chaucheyras-Durand
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gestating ewes ,parturition stress ,rumen microbiota ,fecal microbiota ,live yeast ,DNA sequencing ,Biology (General) ,QH301-705.5 - Abstract
Background: In ruminants, physiological and nutritional changes occur peripartum. We investigated if gastro-intestinal microbiota, rumen metabolism and antioxidant status were affected around parturition and what could be the impact of a daily supplementation of a live yeast additive in late gestating ewes. Methods: Rumen, feces and blood samples were collected from 2 groups of 14 ewes one month and a few days before parturition, and 2 weeks postpartum. Results: In the control ewes close to parturition, slight changes in the ruminal microbiota were observed, with a decrease in the concentration F. succinogenes and in the relative abundance of the Fibrobacteres phylum. Moreover, a decrease in the alpha-diversity of the bacterial community and a reduced relative abundance of the Fibrobacteres phylum were observed in their feces. Control ewes were prone to oxidative stress, as shown by an increase in malondialdehyde (MDA) concentration, a lower total antioxidant status, and higher glutathione peroxidase (GPx) activity in the blood. In the yeast supplemented ewes, most of the microbial changes observed in the control group were alleviated. An increase in GPx activity, and a significant decrease in MDA concentration were measured. Conclusions: The live yeast used in this study could stabilize gastro-intestinal microbiota and reduce oxidative stress close to parturition.
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- 2021
- Full Text
- View/download PDF
5. Assessing the durability of diverse leather tanning techniques for the manufacturing of leather goods through artificial aging processes
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Agnès Thomasset and Stéphane Benayoun
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Leather ,Material durability ,Tanning processes ,Environmental alternatives ,Artificial aging ,Aging characterizations ,Renewable energy sources ,TJ807-830 ,Environmental engineering ,TA170-171 - Abstract
In the context of the growing demand for sustainable consumption, especially in the fashion industry, leather remains an intriguing material. Its durability and quality not only ensure the longevity of products but also support the rise of practices like second-hand use and upcycling. This study evaluates the longevity of tanning alternatives - triazine-based and a combination of synthetic and vegetable tannins - compared to the widely used chrome tanning. Artificial aging processes, incorporating heat, humidity, UV exposure, and microbial conditions, were applied to leathers tanned with the three methods. Physico-mechanical measurements, commonly specified in industrial standards, were conducted alongside chemical analyses to evaluate potential degradations associated with chrome tanning as the reference. The aging processes impacted leather performances, but finished leathers remained suitable for applications. Indeed, results on finished leathers indicated minimal degradation after aging, emphasizing the importance of the protective layer for longevity. Considerations include adapting finishing to surface structures and addressing potential stiffness in triazine-tanned leather, necessitating further exploration.
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- 2024
- Full Text
- View/download PDF
6. Changes in Digestive Microbiota, Rumen Fermentations and Oxidative Stress around Parturition Are Alleviated by Live Yeast Feed Supplementation to Gestating Ewes
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Damien Esparteiro, Mickael Bernard, Agnès Thomas, Evelyne Forano, Frédérique Chaucheyras-Durand, Denys Durand, Yacine Lebbaoui, Philippe Ruiz, Lysiane Dunière, Lallemand SAS, Microbiologie Environnement Digestif Santé (MEDIS), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA), Unité Expérimentale Systèmes d'Elevage de Ruminants de Moyenne Montagne (Herbipôle), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
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Microbiology (medical) ,Antioxidant ,QH301-705.5 ,medicine.medical_treatment ,[SDV]Life Sciences [q-bio] ,Plant Science ,medicine.disease_cause ,Article ,03 medical and health sciences ,Rumen ,chemistry.chemical_compound ,Animal science ,medicine ,rumen microbiota ,live yeast ,oxidative stress ,DNA sequencing ,Biology (General) ,gestating ewes ,Ecology, Evolution, Behavior and Systematics ,Feces ,030304 developmental biology ,2. Zero hunger ,chemistry.chemical_classification ,0303 health sciences ,fecal microbiota ,biology ,Glutathione peroxidase ,0402 animal and dairy science ,04 agricultural and veterinary sciences ,Metabolism ,biology.organism_classification ,Malondialdehyde ,040201 dairy & animal science ,Fibrobacteres ,chemistry ,parturition stress ,Oxidative stress - Abstract
International audience; Background: In ruminants, physiological and nutritional changes occur peripartum. We investigated if gastro-intestinal microbiota, rumen metabolism and antioxidant status were affected around parturition and what could be the impact of a daily supplementation of a live yeast additive in late gestating ewes. Methods: Rumen, feces and blood samples were collected from 2 groups of 14 ewes one month and a few days before parturition, and 2 weeks postpartum. Results: In the control ewes close to parturition, slight changes in the ruminal microbiota were observed, with a decrease in the concentration F. succinogenes and in the relative abundance of the Fibrobacteres phylum. Moreover, a decrease in the alpha-diversity of the bacterial community and a reduced relative abundance of the Fibrobacteres phylum were observed in their feces. Control ewes were prone to oxidative stress, as shown by an increase in malondialdehyde (MDA) concentration, a lower total antioxidant status, and higher glutathione peroxidase (GPx) activity in the blood. In the yeast supplemented ewes, most of the microbial changes observed in the control group were alleviated. An increase in GPx activity, and a significant decrease in MDA concentration were measured. Conclusions: The live yeast used in this study could stabilize gastro-intestinal microbiota and reduce oxidative stress close to parturition
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- 2021
7. Fatty acid composition and oxidation in beef muscles as affected by ageing times and cooking methods
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Dominique Bauchart, Agnès Thomas, Emilie Parafita, Dominique Gruffat, Denys Durand, Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Association pour le Développement de l'Institut de la Viande (ADIV), and OFIVALINTERBEV
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Time Factors ,Rump ,[SDV]Life Sciences [q-bio] ,Analytical Chemistry ,0404 agricultural biotechnology ,Lipid oxidation ,Animals ,Food science ,Cooking ,BeefAgeingCookingFatty acidsOxidation ,2. Zero hunger ,chemistry.chemical_classification ,Chemistry ,Cooking methods ,Muscles ,Fatty Acids ,0402 animal and dairy science ,Fatty acid ,food and beverages ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,040201 dairy & animal science ,Red Meat ,Ageing ,Lipid content ,Composition (visual arts) ,Cattle ,Fatty acid composition ,Food Science - Abstract
International audience; This study aimed to determine how ageing and cooking, each one applied to the beef meat most suitable (panfried or grilled ribeye steak, braised chuck and fried or roasted rump steak), induce changes in lipid content, fatty acid (FA) composition and lipid oxidation of muscles from 16 cattle representative of animals raised for France meat production. The fattiest muscle (ribeye) was the richest in saturated and monounsaturated FA leading to poor nutritional indexes. In contrast, the leanest muscle (rump) had the highest proportion of polyunsaturated FA and the highest levels of peroxidation without exceeding critical limits. The impact of cooking methods seemed mainly linked to the moisture loss increasing meat fat content and the culinary fat addition whose FA composition marked the meat. Cooking methods induced oxidation phenomena that could exceed the limit thresholds. In conclusion, short cooking time of rump steak was the best combination to meet nutritional expectations.
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- 2021
8. Validation of two laboratory methods for beef intramuscular fat quantification
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Carole Delavaud, Denis Durand, Agnès Thomas, Dominique Gruffat, Sylvie Bardou-Valette, Donato Andueza, Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Casdar RT 1620French National Research Agency (ANR)16-IDEX-0001 CAP 20-25
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Meat ,Method validation ,Sample (material) ,Validity domain ,[SDV]Life Sciences [q-bio] ,Discrimination threshold ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Lipid extraction ,Near-infrared spectroscopy ,Animals ,[SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology ,Muscle, Skeletal ,Molecular Biology ,030304 developmental biology ,Mathematics ,Alternative methods ,0303 health sciences ,Laboratory methods ,Chromatography ,Spectroscopy, Near-Infrared ,030302 biochemistry & molecular biology ,Lipids ,Research objectives ,Red Meat ,Calibration ,Cattle ,Intramuscular fat ,Laboratories ,Accuracy profile - Abstract
International audience; Many studies on beef nutritional qualities require the quantification of intramuscular fat. To reduce the sample amount, solvent use and time of analysis, two alternative methods to the Folch et al. (1957) reference method were studied: a miniaturised Folch's method and a near-infrared spectroscopic method. Performances and acceptability limits were evaluated with accuracy profiles for each of the methods. Equations to correct bias between the alternative and reference methods were calculated. Uncertainties associated with measurements were determined, and the validity domains were defined. From a previous set of studies, the ability of each method to discriminate samples from bovines of different breeds or receiving diverse treatments was tested. The validity domain of the miniaturised Folch's method ranged from 1.9 to 13.8 g of total lipids/100 g of tissue, and that of the near-infrared spectroscopic method ranged from 4.8 to 13.8 g of total lipids/100 g of tissue, with less than 20% difference from the reference method's results. Thus, the two alternative methods could be used depending on the research objectives: the miniaturised Folch's method could be used for detailed quantification of intramuscular fat and the near-infrared spectroscopic method for a quick classification of a large number of muscles. The precise knowledge of uncertainties associated with each measurement was determined, and perfect continuity with the results obtained so far with the reference Folch's method was confirmed.
- Published
- 2021
9. Filaggrin and filaggrin 2 processing are linked together through skin aspartic acid protease activation
- Author
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Agnès Thomas-Collignon, Dominique Bernard, Etienne Formstecher, Stephanie Desbouis, Mélanie Salamito, Mark Donovan, Jean-Christophe Rain, and Lucie Simonetti
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0301 basic medicine ,medicine.medical_treatment ,Stratum granulosum ,Human skin ,Filaggrin Proteins ,Biochemistry ,Geographical locations ,0302 clinical medicine ,Aspartic acid ,Medicine and Health Sciences ,Aspartic Acid Endopeptidases ,Protein Interaction Maps ,Skin ,Multidisciplinary ,integumentary system ,Chemistry ,S100 Proteins ,Proteases ,Recombinant Proteins ,Enzymes ,Cell biology ,Europe ,Bioassays and Physiological Analysis ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Medicine ,France ,Anatomy ,Integumentary System ,Research Article ,Filaggrin ,Science ,Two-hybrid screening ,Protein domain ,Library Screening ,Research and Analysis Methods ,03 medical and health sciences ,Protein Domains ,medicine ,Humans ,Protein Interaction Domains and Motifs ,European Union ,Molecular Biology Techniques ,Molecular Biology ,Enzyme Assays ,Molecular Biology Assays and Analysis Techniques ,Protease ,Biology and Life Sciences ,Proteins ,Enzyme Activation ,030104 developmental biology ,Enzymology ,Epidermis ,People and places ,Biochemical Analysis - Abstract
Skin aspartic acid protease (SASPase) is believed to be a key enzyme involved in filaggrin processing during epidermal terminal differentiation. Since little is known about the regulation of SASPase function, the aim of this study was to identify involved protein partners in the process. Yeast two hybrid analyses using SASPase as bait against a human reconstructed skin library identified that the N-terminal domain of filaggrin 2 binds to the N-terminal fragment of SASPase. This interaction was confirmed in reciprocal yeast two hybrid screens and by Surface Plasmon Resonance analyses. Immunohistochemical studies in human skin, using specific antibodies to SASPase and the N-terminal domain of filaggrin 2, showed that the two proteins partially co-localized to the stratum granulosum. In vitro enzymatic assays showed that the N-terminal domain of filaggrin 2 enhanced the autoactivation of SASPase to its 14 kDa active form. Taken together, the data suggest that the N-terminal domain of filaggrin 2 regulates the activation of SASPase that may be a key event upstream of filaggrin processing to natural moisturizing factors in the human epidermis.
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- 2020
10. Quantification of 4-hydroxy-2-nonenal-protein adducts in in vivo gastric digesta of mini-pigs using a GC-MS/MS method with accuracy profile validation
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Michel Laurentie, Mylène Delosière, Cécile Gladine, Thierry Durand, Agnès Thomas, Véronique Santé-Lhoutellier, Denys Durand, Charlotte Joly, Céline Chantelauze, Didier Rémond, Claire Dufour, Alexandre Guy, Estelle Pujos-Guillot, Blandine Comte, Qualité des Produits Animaux (QuaPA), Institut National de la Recherche Agronomique (INRA), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Unité de Nutrition Humaine (UNH), Institut National de la Recherche Agronomique (INRA)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Clermont Université, Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] (IBMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Fougères - ANSES, Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), Sécurité et Qualité des Produits d'Origine Végétale (SQPOV), Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), INRA CEPIA, Qualité des Produits Animaux ( QUAPA ), Institut National de la Recherche Agronomique ( INRA ), Unité Mixte de Recherches sur les Herbivores ( UMR 1213 Herbivores ), VetAgro Sup ( VAS ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique ( INRA ), Unité de Nutrition Humaine ( UNH ), Clermont Université-Université d'Auvergne - Clermont-Ferrand I ( UdA ) -Institut National de la Recherche Agronomique ( INRA ), Université de Bordeaux ( UB ), Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] ( IBMM ), Ecole Nationale Supérieure de Chimie de Montpellier ( ENSCM ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Anses Laboratoire de Fougères, ANSES, Sécurité et Qualité des Produits d'Origine Végétale ( SQPOV ), Institut National de la Recherche Agronomique ( INRA ) -Université d'Avignon et des Pays de Vaucluse ( UAPV ), Unité Mixte de Recherches sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique (INRA), Unité de Nutrition Humaine - Clermont Auvergne (UNH), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne (UCA), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique ( INRA ) -Université d'Auvergne - Clermont-Ferrand I ( UdA ) -Clermont Université, VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université d'Auvergne - Clermont-Ferrand I (UdA)-Clermont Université-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, and Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Avignon Université (AU)
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0301 basic medicine ,pharmacocinétique ,Antioxidant ,Swine ,medicine.medical_treatment ,[SDV]Life Sciences [q-bio] ,specrométrie de masse ,Tandem mass spectrometry ,[ SDV.BA ] Life Sciences [q-bio]/Animal biology ,01 natural sciences ,Antioxidants ,chromatographie gazeuse ,Tandem Mass Spectrometry ,pharmacokinetic ,Meals ,chemistry.chemical_classification ,Chemistry ,General Medicine ,Plants ,Gastrointestinal Contents ,mini-pig ,Models, Animal ,Fatty Acids, Unsaturated ,Swine, Miniature ,Female ,Oxidation-Reduction ,Polyunsaturated fatty acid ,Meat ,mini cochon ,Thiobarbituric Acid Reactive Substances ,Gas Chromatography-Mass Spectrometry ,03 medical and health sciences ,Lipid oxidation ,In vivo ,GC-MS/MS ,medicine ,TBARS ,Animals ,Detection limit ,Aldehydes ,030109 nutrition & dietetics ,Chromatography ,010401 analytical chemistry ,Reproducibility of Results ,Lipid Metabolism ,0104 chemical sciences ,Diet ,Gastrointestinal Tract ,[ CHIM.ANAL ] Chemical Sciences/Analytical chemistry ,Gas chromatography–mass spectrometry ,Food Science - Abstract
International audience; Hydroxyalkenals are lipid oxidation end-products resulting from the oxidation of polyunsaturated fatty acids (PUFA). This study aimed at quantifying the production of 4-hydroxy-2-nonenal-protein adducts (HNE-P) via Michael addition from n-6 PUFA oxidation in the gastric digesta of mini-pigs after the consumption of meat-based meals with different plant antioxidant contents. Using the accuracy profile procedure, we validated an extraction protocol for the quantification of HNE-P by GC-MS/MS in gastric contents. The formation of HNE-P in the gastric compartment was observed for the first time, with concentrations ranging from less than 0.52 to 1.33 nmol HNE-P per 500 mg digesta. Nevertheless, most gastric HNE-P levels were below the limit of quantification of 0.52 nmol HNE-P per 500 mg digesta. In this animal study, the protective effect of plant antioxidant sources on HNE-P formation was not evidenced contrasting with the results using TBARS as markers.
- Published
- 2016
11. Comment doser les marqueurs de la peroxydation des omégas 3 et 6 par CPG-SM/SM dans différentes matrices ? Intérêt du profil d'exactitude dans cette démarche
- Author
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Céline Chantelauze, Charlotte Joly, Mylène Delosière, Blandine Comte, Océane Martin, Pierre, Fabrice H. F., Nathalie Naud, Claire Dufour, Estelle Pujos-Guillot, Agnès Thomas, Denis Durand, Unité Mixte de Recherches sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique (INRA), Unité de Nutrition Humaine (UNH), Institut National de la Recherche Agronomique (INRA)-Université d'Auvergne - Clermont-Ferrand I (UdA)-Clermont Université, Qualité des Produits Animaux (QuaPA), Institut National de la Recherche Agronomique (INRA), ToxAlim (ToxAlim), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole d'Ingénieurs de Purpan (INPT - EI Purpan), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA), Association pour le Développement de l'Industrie de la Viande, Sécurité et Qualité des Produits d'Origine Végétale (SQPOV), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), Avignon Université (AU)-Institut National de la Recherche Agronomique (INRA), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS), Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Ecole d'Ingénieurs de Purpan (INP - PURPAN), Université de Toulouse (UT)-Université de Toulouse (UT), Association pour le Développement de l'Industrie de la Viande (ADIV), Prévention et promotion de la cancérogénèse par les aliments (ToxAlim-PPCA), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Recherche Agronomique (INRA)-Université Toulouse III - Paul Sabatier (UT3), Unité Mixte de Recherches sur les Herbivores ( UMR 1213 Herbivores ), VetAgro Sup ( VAS ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique ( INRA ), Unité de Nutrition Humaine ( UNH ), Clermont Université-Université d'Auvergne - Clermont-Ferrand I ( UdA ) -Institut National de la Recherche Agronomique ( INRA ), Qualité des Produits Animaux ( QUAPA ), Institut National de la Recherche Agronomique ( INRA ), ToxAlim ( ToxAlim ), Institut National Polytechnique [Toulouse] ( INP ) -Institut National de la Recherche Agronomique ( INRA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Ecole Nationale Vétérinaire de Toulouse, Sécurité et Qualité des Produits d'Origine Végétale ( SQPOV ), and Université d'Avignon et des Pays de Vaucluse ( UAPV ) -Institut National de la Recherche Agronomique ( INRA )
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exactitude ,méthode d'extraction ,expression génique ,[ SDV.IDA ] Life Sciences [q-bio]/Food engineering ,AGPI n-3 ,polyunsaturated fatty acid ,AGPI n-6 ,exactness ,HNE-P ,HNE ,lipoperoxydation ,acide gras polyinsaturé ,[SDV.IDA]Life Sciences [q-bio]/Food engineering ,gene expression ,HHE ,évaluation de la toxicité ,HHE-P ,hydroxyalkénals ,profil d’exactitude - Abstract
Les acides gras polyinsaturés (AGPI) de type n-6 et n-3 sont connus pour leurs propriétés bénéfiques pour l'Homme. Mais ces composés sont également très sensibles à la peroxydation. Les produits terminaux de la lipoperoxydation sont le 4-hydroxy-2-nonénal (HNE) et le 4-hydroxy-2-hexénal (HHE) respectivement. Ces composés sont très réactifs ce qui leur permet de moduler l’expression génique en se fixant sur des protéines ou directement sur l’ADN. Par contre, ils peuvent aussi s’avérer cytotoxiques lorsqu’ils sont produits en excès. Ils existent sous deux formes, une forme libre et une forme liée notamment à des protéines. Nous avons mis au point une méthode d’extraction conjointe du HNE et du HHE sous leurs deux formes pour leur quantification par CPG-SM/SM. Nous avons également proposé différentes adaptations de la méthode en fonction des matrices testées. Enfin, certaines performances des méthodes proposées ont été évaluées par l'approche du profil d’exactitude.
- Published
- 2015
12. 090 The N-terminal domain of Filaggrin 2 co-localizes, binds to and activates the Skin aspartic acid protease in the epidermis of human skin
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C. Reverdy, Christine Collin-Djangone, Agnès Thomas-Collignon, Dominique Bernard, Stephanie Desbouis, Mark Donovan, E. Formstecher, J. Rain, and Lucie Simonetti
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medicine.medical_specialty ,FILAGGRIN 2 ,Protease ,Epidermis (botany) ,Chemistry ,medicine.medical_treatment ,Human skin ,Cell Biology ,Dermatology ,Biochemistry ,Domain (software engineering) ,Cell biology ,Terminal (electronics) ,Aspartic acid ,medicine ,Molecular Biology - Published
- 2017
13. P007: Effet du mode de broyage sur la prédiction par Spectroscopie Proche Infrarouge des acides gras de la bavette de flanchet chez le bovin
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Agnès Thomas, Jérôme Normand, Guillaume Mairesse, Benoît-Pierre Mourot, Yohann Léguillon, Nathalie Kerhoas, Denys Durand, Emmanuelle Certenais, Guillaume Chesneau, Daniel Manceau, Cécile Guillon, and Marion Ferrand
- Subjects
2. Zero hunger ,0303 health sciences ,03 medical and health sciences ,Nutrition and Dietetics ,030309 nutrition & dietetics ,Endocrinology, Diabetes and Metabolism ,010401 analytical chemistry ,Internal Medicine ,01 natural sciences ,0104 chemical sciences - Abstract
Introduction et but de l’etude L’utilisation de la spectroscopie proche infrarouge (SPIR) pour determiner la qualite nutritionnelle d’une viande est en developpement. Parmi les parametres mesures, la quantification rapide et a moindre cout des acides gras (AG) est d’un interet particulier pour les filieres de differenciation des viandes portant sur leur qualite lipidique, comme la filiere Bleu-Blanc-Coeur. Des travaux chez le bovin ont montre que certains acides gras pouvaient etre mesures par SPIR sur des echantillons broyes finement a l’azote liquide (Mourot et al. , 2013). Cependant ce mode de preparation des echantillons est contraignant et onereux. L’objectif de ce travail est donc de tester les performances de prediction des acides gras de la viande bovine a l’aide d’un equipement de laboratoire et d’etudier l’effet du mode de preparation de l’echantillon. Materiel et methodes 76 bavettes de flanchet (Rectus abdominis) issues de gros bovins de types genetiques differents (lait ou viande), de categories animales differentes (taurillons, vaches, bœufs) et consommant des rations diversifiees a base d’herbe ou d’ensilage de mais avec ou sans supplementation lipidique a base de graines de lin extrudees ont ete prelevees. Les mesures de spectres infrarouges ont ete acquises en suivant un gradient croissant d’homogeneite de l’echantillon : (i) decoupe en cubes (B0), (ii) broye avec un hachoir a viande (B1), (iii) broye avec un broyeur a couteaux (B2) et (iv) broye finement dans l’azote liquide (B3). Les profils en acides gras (g/100 g de viande) ont ete determines par Chromatographie en Phase Gazeuse, sur les echantillons broyes a l’azote liquide. Les modeles de calibrations ont ete developpes par PLS et valides par validation croisee, sur le logiciel R et sur l’ensemble du spectre. Les performances des modeles pour les differents acides gras sont evaluees sur la base des criteres suivants : erreur de validation croisee (SECV) ; coefficient de determination en validation croisee (R 2 CV) et rapport de performances (RPD : rapport entre l’ecart-type des valeurs d’acides gras obtenues par chromatographie et le SECV). Un RPD superieur a 10 est considere comme etant similaire a la methode de reference. Pour la prediction des teneurs en acides gras des viandes, un RPD de 2,5 est considere comme satisfaisant pour des analyses de routine (Guy et al. , 2011). Resultats et Analyse statistique Les resultats montrent des performances de prediction des acides gras croissantes avec le gradient de broyage des echantillons, et ce quels que soient les acides gras. Les predictions sur les echantillons B0 ou B1 sont sensiblement les memes et ne sont pas satisfaisantes (RPD 2 > 0,85 et RPD > 2,5) et le sont d’autant mieux pour le broyage B3. Pour les autres acides et notamment les acides gras polyinsatures (AGPI) n-6 ou n-3, les performances ne sont pas satisfaisantes a des fins quantitatives (RPD Conclusion La SPIR peut etre utilisee comme methode de mesure rapide, fiable et simple a mettre en œuvre pour la determination de certains acides gras de la viande. L’homogeneite de l’echantillon est une condition importante quant a la qualite des predictions obtenues.
- Published
- 2014
14. Role of Multidetector CT Imaging in the Risk Stratification of Gastrointestinal Stromal Tumors (GISTs)–A Retrospective Analysis
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Geena Benjamin, Thara Pratap, Mangalanandan Sreenivasan, Dhanya Jacob, Agnes Thomas, Bala Sankar, and Amith Itty
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gist ,mdct ,risk stratification ,Internal medicine ,RC31-1245 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background Gastrointestinal stromal tumors (GISTs) are the most common gastrointestinal mesenchymal neoplasms which can arise from any part of the gastrointestinal tract (GIT) or an extraintestinal location. Size and the organ of origin are the major imaging inputs expected from the radiologist. However, it is worthwhile to find out which imaging characteristics on MDCT correlate with risk stratification. This knowledge would help the clinician in treatment planning and prognostication. The aim of this retrospective study is to evaluate the various MDCT imaging characteristics of GISTs and find out which parameters have significant association with risk and subsequent development of metastasis on follow-up whenever it was possible. Materials and Methods This is a retrospective study conducted on 45 histopathologically proven cases of GIST from two institutions by searching from the digital archives. The following imaging parameters were analyzed: maximum size in any plane, organ of origin, shape (round, ovoid or irregular), margin (well-defined or ill-defined), surface (smooth or lobulated), percentage of necrosis, growth pattern, enhancement characteristics–both intensity (mild, moderate or significant) and pattern (homogenous vs. heterogenous), calcification, infiltration into adjacent organs, and presence of metastasis at presentation or on follow-up. Results CT morphological parameters of significance in risk stratification as per our study include tumor necrosis, predominant cystic change, irregular and lobulated shape/surface characteristics, and adjacent organ infiltration. The parameters which were associated with development of metastasis were size > 5 cm, necrosis > 30%, and the presence of adjacent organ infiltration. Conclusion The radiologist has an important role in ascertaining the size of tumor as well as the organ of origin accurately to guide the clinician in risk calculation and subsequent prognostication. In addition, certain CT characteristics mentioned above, namely, tumor size, significant necrosis/cystic changes, irregular/lobulated contour, and invasion of adjacent organs, help in risk stratification and in predicting metastasis/poor prognosis.
- Published
- 2021
- Full Text
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15. P008: Prédiction de la composition en acides gras des carcasses bovines par spectroscopie proche infrarouge : choix du site de mesure
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Agnès Thomas, Marion Ferrand, Nathalie Kerhoas, Daniel Manceau, Benoît-Pierre Mourot, Guillaume Mairesse, Guillaume Chesneau, A. Cartes, R. Le Page, Cécile Guillon, Denys Durand, and J. Normand
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0404 agricultural biotechnology ,Nutrition and Dietetics ,Endocrinology, Diabetes and Metabolism ,010401 analytical chemistry ,Internal Medicine ,04 agricultural and veterinary sciences ,040401 food science ,01 natural sciences ,0104 chemical sciences - Abstract
Introduction et but de l’etude Le projet SpecMeat vise a mettre au point un outil analytique utilisable en abattoir, base sur la spectroscopie proche infrarouge (SPIR), pour apprecier la composition en acides gras (AG) de la viande bovine. Il permettrait ainsi d’orienter precocement les carcasses vers les circuits commerciaux les plus adaptes (filiere Bleu-Blanc Cœur, par exemple) sur la base de leur composition en AG. La methode de reference pour la mesure de la composition en AG, la chromatographie en phase gazeuse (CPG), est destructrice, longue et couteuse. Des travaux precurseurs ont montre que la SPIR est une methode de mesure alternative (Mairesse et al. , 2012 ; Riovanto et al. , 2012), qui, apres une phase de calibration specifique de chaque parametre a mesurer, presente l’interet d’etre rapide, non destructive, peu couteuse et souvent utilisable en ligne. L’etude rapportee ici a pour objectif de determiner le tissu de la carcasse d’un gros bovin a mesurer pour une calibration optimale de la SPIR sur la composition en AG. Materiel et methodes Sept tissus dont 4 muscles i) Longissimus thoracis, ii) Infraspinatus, iii) Diaphragma, iv) Rectus abdominis, et 3 tissus adipeux : i) le gras d’epaule, ii) le gras sous-cutane intercostal, iii) le gras intermusculaire de la 5 e cote ont ete preleves sur 78 carcasses de gros bovins de differents types genetiques (lait, viande), de differentes categories (jeunes bovins, vaches, bœufs), alimentes avec des rations a base d’herbe ou d’ensilage de mais avec ou sans supplementation en graines de lin extrudees. Des mesures spectrales (C 0 ) ont ete realisees sur la carcasse avant prelevements puis sur les tissus broyes finement dans l’azote liquide (B 3 ). Les spectres ont ete acquis a l’aide d’un spectrometre portable ASD LabSpec 4 (350–2 500 nm). Les profils en acides gras ont ete determines par CPG apres extraction des lipides totaux et transmethylation (Guy et al. , 2011). Les modeles de calibration ont ete developpes par PLS et valides par validation croisee sur le logiciel R, pour l’ensemble du spectre. Les performances du modele de predictions pour les differents acides gras sont evaluees sur la base des criteres suivants : erreur de validation croisee (SE CV ) et coefficient de determination en validation croisee (R 2 CV ). Resultats et Analyse statistique Pour les tissus adipeux, quels que soient les acides gras consideres, ils ne sont pas correctement predits a partir des mesures SPIR C 0 (R 2 CV 3 (R 2 CV 3 : R 2 CV > 0,78) par rapport aux muscles bruts presents sur la carcasse (C 0 : 0, 66 > R 2 CV > 0,29). Les AG polyinsatures (AGPI) semblent mal predits par la SPIR portable. Le Diaphragma , muscle plus gras que les 3 autres (10,2 % de lipides vs . 5,9 % en moyenne pour les autres), enregistre les performances de calibration les plus faibles des muscles, celles des 3 autres muscles etant tres proches. Conclusion La SPIR portable presente un potentiel interessant pour une utilisation sur le terrain en vue de classer et orienter les carcasses sur la base de leur composition en AG. De facon a optimiser la prediction de la composition en AG, il semble preferable de realiser les mesures sur des muscles maigres comme le Rectus abdominis. Remerciements : Cette etude a ete realisee avec le soutien financier du 14 e FUI, des regions Bretagne et Pays de la Loire, du Conseil General des Cotes-d’Armor, de Lannion-Tregor-Communaute et du FEDER (Projet SpecMeat).
- Published
- 2014
16. Hyperglycemia-induced seizures - Understanding the clinico- radiological association
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Shivaprakash B Hiremath, Amol A Gautam, Prince J George, Agnes Thomas, Reji Thomas, and Geena Benjamin
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hyperglycemia ,magnetic resonance imaging ,seizures ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Objectives: To highlight the typical magnetic resonance imaging (MRI) findings in hyperglycemia-induced seizures and compare the results with similar previous studies with a brief mention of pathophysiological mechanisms. Materials and Methods: This retrospective study included medical and imaging records of six consecutive patients with hyperglycemia-induced seizures. The data analysis included a clinical presentation and biochemical parameters at admission. The MRI sequences were evaluated for region involved, presence of subcortical T2 hypo-intensity, cortical hyper-intensity, and restricted diffusion. Similar previous studies from the National Library of Medicine (NLM) were analyzed and compared with our study. Results: Twenty-four patients were included from four studies in previous literature for comparison. In our study, on imaging, posterior cerebral region was predominantly involved, with parietal involvement in 83.3%, followed by occipital, frontal, and temporal involvement in 33.3% patients compared with occipital in 58.3%, parietal in 45.8%, and frontal and temporal in 16.6% of patients in previous literature. The subcortical T2 hypo-intensity was present in 83.3% of the patients, cortical hyper-intensity in all patients, and restricted diffusion in 66.6% of the patients in our study compared with subcortical T2 hypo-intensity in 95.8% of the patients, cortical hyper-intensity in 62.5%, and restricted diffusion in 58.3% of the patients in previous literature. Conclusion: Although many etiologies present with subcortical T2 hypointensity, cortical hyperintensity, restricted diffusion, and postcontrast enhancement on MRI, the clinical setting of seizures in a patient with uncontrolled hyperglycemia, hyperosmolar state, and absence of ketones should suggest hyperglycemia-induced seizures to avoid misdiagnosis, unnecessary invasive investigations, and initiate timely management. Advances in Knowledge: Our study highlights the presence of posterior predominant subcortical T2, fluid-attenuated inversion recovery (FLAIR), and susceptibility-weighted angiography (SWAN) hypointensity; cortical hyperintensity; and restricted diffusion in hyperglycemia-induced seizures. The presence of T2 and SWAN hypointensity could support the hypothesis of possible deposition of free radicals and iron in the subcortical white matter.
- Published
- 2019
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17. Small Bowel Diverticulosis Causing Pneumoperitoneum without Peritonitis: A Case Report
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Geena Benjamin, Agnes Thomas, and Mathew Koshy
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jejunal diverticulosis ,pneumoperitoneum without peritonitis ,small bowel diverticulosis ,Internal medicine ,RC31-1245 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Small bowel diverticulosis is a rare finding, with varied clinical presentations, which make the diagnosis difficult and delayed. Many cases are asymptomatic. However, it is an entity that can present with fatal complications. Here, we present a case of a 79-year-old male patient with diffuse small bowel diverticulosis, who presented with loose stools and acute exacerbation of chronic abdominal pain. Plain abdominal X-ray showed dilated bowel loops and pneumoperitoneum, which raised the possibility of bowel perforation. Computed tomography images revealed diffuse small bowel diverticulosis and pneumoperitoneum. Subsequent explorative laparotomy revealed no bowel perforation. Small bowel diverticulosis is a well-known cause of chronic/recurrent pneumoperitoneum without peritonitis or surgery.
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- 2018
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18. Repellent Effect and Insecticidal Activities of Bridelia ferruginea, Blighia sapida, and Khaya senegalensis Leaves Powders and Extracts against Dinoderus porcellus in Infested Dried Yam Chips
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Laura Yêyinou Loko, Obédatou Alagbe, Elie A. Dannon, Benjamin Datinon, Azize Orobiyi, Agnés Thomas-Odjo, Alexandre Dansi, and Manuele Tamò
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Zoology ,QL1-991 - Abstract
Dinoderus porcellus is considered as the most important pest of stored yam chips and compounds extracted from plants can be used for its control. The present study aimed to test the insecticidal and repellent activities of powders and extracts of leaves of Bridelia ferruginea, Blighia sapida, and Khaya senegalensis against D. porcellus. The efficacy of plant powders was compared with the synthetic pesticide Antouka (Permethrin 3 g/kg + pirimiphos 16 g/kg). The results of the experiment revealed that all plant powders were effective as repellents. Antouka was more effective as insecticidal than the plant powders and minimal weight loss was observed with B. sapida at 2%. Among treatments, propanol extract of K. senegalensis at 5% was found to elicit the highest repellent effect on D. porcellus. The LC50 results revealed that the acetone extract of K. senegalensis is the most toxic (0.29 μL/insect) to the pest, while the propanol extract of B. ferruginea at 5% exhibited strong fumigant toxicity against D. porcellus, with 88.89% of pest mortality at 160 μL/L air. The findings from the current work proved that plant powders and extracts of the three plants are sources of botanical insecticides which may be used in the integrated management of D. porcellus.
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- 2017
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19. Hector Malot : Normandie réelle, Normandie rêvée
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Marcoin, Francis, Canva, Pauline, Nicolas Coutant, and Agnès Thomas-Vidal
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[SHS.LITT] Humanities and Social Sciences/Literature - Published
- 2016
20. Quand le cinéma révèle l’universel du roman Sans Famille
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Prevost, Christine, Delmare, Aliénor, Nicolas Coutant, and Agnès Thomas-Vidal
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Hector Malot (1830-1907) ,[SHS.LITT] Humanities and Social Sciences/Literature ,Roman -- Thèmes motifs ,[SHS.ART] Humanities and Social Sciences/Art and art history - Published
- 2016
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