Auswahl der wissenschaftlichen Literatur zum Thema „Activité antioxydante DPPH“
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Zeitschriftenartikel zum Thema "Activité antioxydante DPPH"
Bashige, V. C., A. S. Bakari, B. J. Kahumba und J. B. S. Lumbu. „Activité antioxydante de 53 plantes réputées antimalariques en République Démocratique du Congo“. Phytothérapie 19, Nr. 5-6 (Oktober 2021): 355–71. http://dx.doi.org/10.3166/phyto-2021-0274.
Der volle Inhalt der QuelleBamba, Bourahima, Comoé Koffi Donatien Benie, Abou Ouattara, Dahiro Noël Doukourou, Richard Kamou Kamou und Karamoko Ouattara. „Teneurs en phénols totaux, activités antioxydantes des macérés et décocté des feuilles de Uvaria chamae P. Beauv. (Annonaceae)“. International Journal of Biological and Chemical Sciences 15, Nr. 1 (20.04.2021): 54–67. http://dx.doi.org/10.4314/ijbcs.v15i1.6.
Der volle Inhalt der QuelleTANGARA, Dougoutigui, Amadou DIOP, Harouna TIRERA, Benoît Yaranga KOUMARE, Mohamed El Bechir NACO, Djibril FALL, Serigne Omar SARR und Yérim Mbagnick DIOP. „Borreria verticillata plante médicinale sénégalaise : Étude de l'activité antioxydante d'extraits méthanoliques, chloroformiques, aqueux et acétates de la plante entière (racine, tige, feuille, fleurs)“. Journal of Applied Biosciences 171 (31.03.2022): 17812–20. http://dx.doi.org/10.35759/jabs.171.4.
Der volle Inhalt der QuelleLAIB, Imen, Hanane KARIT, Rahma BOUZERDOUNA, Fatima KETTOUCHE und Malika BARKAT. „Effet de digestion gastro-intestinale in vitro sur les composés phénoliques et l’activité antioxydante d’ail triquètre Allium triquetrum L.“ Journal of Applied Biosciences 171 (31.03.2022): 17821–37. http://dx.doi.org/10.35759/jabs.171.5.
Der volle Inhalt der QuelleBen-Moussa, Mohammed Tahar, Khaled Khelil, Hassina Harkat, Samia Lakehal und Youcef Hadef. „Chemical composition, antimicrobial and antioxidant activity of the essential oil of Brocchia cinerea VIS. from Algeria“. Batna Journal of Medical Sciences (BJMS) 7, Nr. 2 (09.11.2020): 122–28. http://dx.doi.org/10.48087/bjmsoa.2020.7213.
Der volle Inhalt der QuelleMbang Mbarga, Audrey Judith, Cunégonde Blanche Etoundi Omgba, Rodolphe Djessissem und Marie Modestine Kana Sop. „Evaluation of the activity of alpha amylase and antioxidant potential formulations of three varieties of oyster mushrooms: Pulmonarius , floridanus and sajor-caju“. Journal of the Cameroon Academy of Sciences 15, Nr. 3 (04.08.2020): 151–62. http://dx.doi.org/10.4314/jcas.v15i3.1.
Der volle Inhalt der QuelleBoulaghmen, F., C. Chaouia und F. Saidi. „Composition chimique et propriétés antioxydante et antimicrobienne de l’huile essentielle d’Origanum floribundum Munby“. Phytothérapie 17, Nr. 5 (10.04.2019): 249–58. http://dx.doi.org/10.3166/phyto-2019-0115.
Der volle Inhalt der QuelleKrimat, S., H. Metidji, C. Tigrine, D. Dahmane, A. Nouasri und T. Dob. „Analyse chimique, activités antioxydante, anti-inflammatoire et cytotoxique d’extrait hydrométhanolique d’Origanum glandulosum Desf.“ Phytothérapie 17, Nr. 2 (April 2019): 58–65. http://dx.doi.org/10.3166/phyto-2019-0137.
Der volle Inhalt der QuelleKagnou, Hèzouwè, Oudjaniyobi Simalou, Gneiny Whad Tchani, Sabrina Sanvee, Kokou Agbékonyi Agbodan, Outéndé Toundou und Kafui Kpegba. „Etude phytochimique et activité antioxydante comparatives des trois variétés de Catharanthus roseus (L.) G. Don“. International Journal of Biological and Chemical Sciences 14, Nr. 6 (07.10.2020): 2352–61. http://dx.doi.org/10.4314/ijbcs.v14i6.33.
Der volle Inhalt der QuelleLAOUFI, Razika, Khaled BOUDJEMA, Samia LEFKIR, Narimen BENHABYLES, Ouahiba BOUCHENAK und Karima YAHIAOUI. „Valorization and biological effect of Zizuphus jujuba Mill. vegetable oil“. Nutrition & Santé 12, Nr. 01 (30.06.2023): 38–47. http://dx.doi.org/10.30952/ns.12.1.5.
Der volle Inhalt der QuelleDissertationen zum Thema "Activité antioxydante DPPH"
Muanda, François Nsemi. „Identification de polyphénols, évaluation de leur activité antioxydante et étude de leurs propriétés biologiques“. Thesis, Metz, 2010. http://www.theses.fr/2010METZ011S/document.
Der volle Inhalt der QuelleNatural substances from biomass plant have taken advantage of multiple interests in the biotechnology industries both in food, cosmetic and pharmaceutical. Between these compounds are found much of secondary metabolites which are mainly illustrated in therapeutics. Traditional medicines has used for long time plant materials for healing without knowing what had caused their actions, then studies of secondary metabolites are the subject of numerous studies based on in vitro and in vivo cultures of plant tissues. These include phenolic compounds, polyphenols, flavonoids, anthocyanins, tannins ... which are the subject of our study, compounds widely used in therapeutics as vasculoprotective, anti-inflammatory, enzyme inhibitors, antioxidant and anti free radical. Our work has brought the excerpts from six plants (Daniella oliveri, Desmodium adscendens, Ficus capensis, Securidaca longependuculata, Stevia rebaudiana, and Vitex doniana) traditionally used to treat many diseases in various parts of the world (America, Africa, Asia). The methodology developed for the analysis of these extracts has been applied for the determination of root exudates of Miscanthus x giganteus. The combination of some methods of chemical analysis, spectrophotometry (UV, NMR, MS), chromatography (TLC, CC, HPLC, GC-MS) and biology allowed us to evaluate quantitative and qualitative phenolic extracts from these plants materials. Further analysis helped to highlight the antioxidant capacity and anti-radical of these extracts. While biology tests were used for the evaluation of certain properties such as antimicrobial and anti inflammatory. The results of this work have allowed us to conclude that all plant extracts studied has very good antioxidant properties that may allow us to recommend them in biotechnology
Ben, Nasr Rania. „Investigation phytochimique, évaluation des activités larvicide et anti-acétylcholinestérase de différents extraits de Mercurialis annua L“. Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0155.
Der volle Inhalt der QuelleThis work reports the link between the larvicidal activity and the chemical composition of the different extracts of the male and female feet of Mercurialis annua L. a Euphorbiaceae often used in traditional medicine. The plant material used in our study is collected in four regions of Tunisia located in different bioclimatic stages: Bizerte, Jandouba, Nabeul and Beja. This study includes a first part devoted to a bibliographic synthesis. The second part is devoted to experiments and results. Indeed, we evaluated the antioxidant activity of the different extracts using DPPH tests. The phenolic compounds were identified and quantified by liquid chromatography coupled with a UV detector and mass spectrometry (LC-UV-ESI / MS). Our results showed that methanolic extracts from male plants have higher antioxidant activity (AOA) than that detected in extracts from female plants. On the other hand, male and female plant extracts from Bizerte showed the highest AOA level. For both sexes, Beja plant extracts have the lowest AOA. Certain phenolic compounds such as: narcissin, gallocatechin, rutin, epigallocatechin and epicatechin have been identified and quantified by LC-MS. On the other hand, the larvicidal activity of the various aqueous extracts of Mercurialis annua L. against the larvae of Tribolium confusum (Du Val) showed that the mortality could reach 100% after 48 hours of exposure for certain extracts, this is confirmed. by their low LC50. Furthermore, the study of the anti-acetylcholinesterase activity of the extracts tested shows that they are more potent AChE inhibitors than galantamine used as a positive control.Our study confirmed that extracts of the leaves and seeds of both sexes of Mercurialis annua L., coming from different regions of Tunisia, can therefore be exploited for other biological activities, among which the inhibitory action of AChE. Indeed, these extracts are rich in phenolic compounds, which gives them this therapeutic property against Alzheimer's disease and scavenging free radicals
Nsuadi, Manga Francine. „Activités vasculaires et antioxydantes d'espèces des genres Combretum et Hymenocardia, plantes présumées antihypertensives à Kinshasa et dans le Bas-Congo“. Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209495.
Der volle Inhalt der QuelleAfin de donner une base scientifique à l’utilisation de ces plantes dans le traitement de l'hypertension artérielle en médecine traditionnelle congolaise, nous avons réalisé dans un premier temps une enquête ethnobotanique. Celle-ci a été menée auprès de tradipraticiens de Kinshasa et du Bas-Congo, dans l'ouest de la R.D.Congo, afin d'obtenir des informations spécifiques sur les plantes qui sont utilisées pour traiter l'hypertension. Suite à cette enquête, trois plantes ont été sélectionnées :les feuilles et les écorces de racines de Combretum racemosum P. Beauv (Combretaceae), les feuilles de Combretum celastroides subsp. laxiflorum Welw (Combretaceae) et les écorces de tronc et de racines d'Hymenocardia acida Tul. (Euphorbiaceae). L'évaluation de l'effet vasorelaxant des extraits polaires issus de ces plantes sur les anneaux d’aorte isolée de rat a montré que les extraits testés ont un effet vasorelaxant endothélium-dépendant. Tous les extraits induisent cet effet via la voie du NO-GMPc alors que ceux de feuilles et d'écorces de racines de Combretum racemosum agissent également via la voie des prostanoïdes. Ces extraits ont aussi une action antioxydante. Enfin, l'administration chronique des extraits polaires de feuilles de Combretum celastroides subsp. laxiflorum et d'écorces de racines d'Hymenocardia acida aux rats spontanément hypertendus a montré que ces deux extraits possèdent une activité antihypertensive. Dans le but de déterminer les composés phytochimiques responsables de l’activité vasorelaxante observée, les extraits polaires de feuilles de Combretum celastroides subsp. laxiflorum et d'écorces de racines d'Hymenocardia acida ont été soumis à un fractionnement sur une colonne de polyamide. Toutes les fractions obtenues ont présenté une activité antioxydante, mais l'activité vasorelaxante était concentrée dans une fraction dont l'analyse par chromatographie liquide couplée à la spectrométrie de masse après thiolyse a indiqué qu'elle était enrichie en procyanidines. En conclusion, notre étude montre l'intérêt de ces plantes dans le traitement de l'hypertension en médecine traditionnelle congolaise, intérêt qui mérite d’être confirmé par des études cliniques rigoureuses./
Cardiovascular diseases represent a major cause of death in the world. Currently, their prevalence grows in sub-Saharan Africa where hypertension represents a major cardiovascular risk factor. Different drugs are used for the treatment of hypertension, but in low-income countries in general and in the D.R.Congo in particular, low socio-economic level forces the population to frequently recourse to the traditional health systems. In D.R.Congo, the traditional healers use a variety of plants to treat hypertension, but the pharmacological properties of some of these plants on vascular function have not been investigated.
To provide a scientific basis for the use of these plants in the treatment of hypertension in Congolese traditional medicine, we first carried out an ethnobotanical survey among traditional healers in some districts of Kinshasa and Bas-Congo, in the west of D.R. Congo, to obtain specific information about the plants that are used as antihypertensive remedies. As a result of this investigation, three plants were selected :leaves and root bark of Combretum racemosum P. Beauv (Combretaceae), leaves of Combretum celastroides subsp. laxiflorum Welw (Combretaceae), and trunk bark and root bark of Hymenocardia acida Tul. (Euphorbiaceae). The evaluation of the vasorelaxant effect of the polar extracts from these plants on isolated rat aorta showed that all extracts have an endothelium-dependent vasorelaxant effect. All extracts induce the vasorelaxant effect through the NO-cGMP pathway while those of Combretum racemosum leaves and root bark also act via the prostanoids pathway. These extracts also showed an antioxidant activity. Chronic administration of polar extracts of Combretum celastroides subsp. laxiflorum leaves and Hymenocardia acida root bark to spontaneously hypertensive rats showed that both extracts have an antihypertensive activity. Both extracts were fractionated on a column of polyamide in order to determine the nature of the compounds responsible for the vasorelaxant activity. All fractions obtained had an antioxidant activity but the vasorelaxant activity was concentrated in one fraction. Analysis of this fraction by liquid chromatography-mass spectrometry after thiolysis indicated that it was enriched in procyanidins. In conclusion, our study shows the interest of these plants in the treatment of hypertension in Congolese traditional medicine, interest which should be confirmed by rigorous clinical studies.
Doctorat en Sciences biomédicales et pharmaceutiques
info:eu-repo/semantics/nonPublished