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In vitro biological activities of aqueous extracts of Tetrapleura tetraptera(Schumach. & Thonn.) taub. and Aframomum citratum(C. Pereira) *** from three Agroecologic Zones in Cameroon

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Asian Pacific Journal of Tropical Medicine 2020年第2期13卷 71-80页

作者： Eyenga Manga marie laure fauconnier Judith laure Ngondi Akoumou Manga Ngando Marianne Sindic Laboratory of Quality and Safety of Agro-food Products TERRAGembloux AgroBio-TechUniversity of LiegePassage des Déportés25030 Gembloux-Belgium Laboratory of chemistry of natural molecules Gembloux Agro-Bio TechUnivervity of LiegePassage des Déportés25030 Gembloux-Belgium Laboratory of Nutrition and Nutritional Biochemistry Department of BiochemistryFaculty of SciencesYaounde I universityPO.Box:812YaoundeCameroon National Institut of Cartography Ministry of Scientific Research and InnovationsPO.Box:157YaoundéCameroon

Objective:To investigate some phytochemical constituents and biological activities of twelve samples of Tetrapleura tetraptera(Schumach&Thonn.)*** nine samples of Aframomum citratum(***)*** fruits collected in the bimodal forest zone(ZONEⅤ),the unimodal forest zone(ZONEⅣ)and the highlands zone(ZONEⅢ)in ***:Fresh fruits extracts were obtained by aqueous infusion(100℃during 15 min)and evaluated by spectrophotometric methods for total polyphenol(TPP),total flavonoids(TFLV)contents and antioxidant(DPPH,total antioxidant capacity by the phosphomolybdenum method,iron reducing power or ferric reducing antioxidant power and inhibition of beta carotene discoloration assays)and anti-inflammatory(inhibitions of protein denaturation and 5-LOX represented by *** and INH.5-LOX respectively)*** component analysis was ***:For both species,fruits from ZONEⅤhave the highest TPP,TFLV levels and biological *** and TFLV content of Aframomum citratum and Tetrapleura tetraptera fruits are positively and significantly(P<0.05)*** biological activities of all extracts(0.25,2.5,25,250 mg/mL)were dosedependent and the extracts have shown strong antioxidant and antiinflammatory activities,but less than references(ascorbic acid,diclofenac,quercetin,and butylated hydroxytoluene).There was a positive correlation between TPP,TFLV and total antioxidant capacity,ferric reducing antioxidant power,and inhibition of beta carotene discoloration assays,and inverse correlations were observed with the IC50(g/mL)of DPPH,INH.5-LOX and *** assays for both ***:The fruits exhibit variabilities and those from ZONEⅤfor both species are economically and healthcare challenging for herbalists,pharmaceutical firms,scientists and ***,most important extraction yield of bioactive compounds correlated with significant biological activities and the use of less material compared with an implementation in o

关键词： Biological activities Non-Timber forest products Antioxidant Anti-inflammatory Agro-ecologic Zone Protein denaturation

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Role of terpenes from aphid-infested potato on searching and oviposition behavior of Episyrphus balteatus

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Insect Science 2007年第1期14卷 57-63页

作者： NICOLAS HARMEL RAKI ALMOHAMAD marie-laure fauconnier PATRICK DU JARDIN FRANCOIS VERHEGGEN MICHEL MARLIER ERIC HAUBRUGE FREDERIC FRANCIS Department of Functional and Evolutionary Entomology Department of Plant Biology Department of General and Organic Chemistry Gembloux Agricultural University Gembloux Belgium

To cope with pathogen and insect attacks, plants develop different mechanisms of defence, in both direct （physical and chemical） and indirect ways （attractive volatiles to entomophagous beneficials）. Plants are then able to express traits that facilitate ＂top-down＂ control of pests by attracting herbivore predators. Here we investigate the indirect defence mechanism of potato plants by analyzing the volatile patterns of both healthy and aphid- infested plants. Important changes in the emitted terpene pattern by the Myzus persicae infested host plant were observed. Using Solid Phase MicroExtraction （SPME） and GC-MS, the （E）-fl-farnesene （EBF） appeared to be emitted by aphid-infested potato and not by healthy plants. To assess the infochemical role of these volatile releases after aphid damage on the aphidophagous predators Episyrphus balteams, the hoverfly foraging behavior was assessed using the Observer 5.0 software （Noldus, Wageningen, The Netherlands）. Aphidfree potato plants were also used as a control volatile source in the predator behavioral study. While aphid-infested plants induced efficient searching and acceptation behaviors leading to egg-laying, no kairomonal effect of healthy potato plants was observed, leading to longer immobility durations and shorter searching periods in the net cage. High oviposition rate of E. balteatus was observed when aphid-infested potato was used （mean of 48.9 eggs per laying and per female）. On the other hand, no egg was produced by the hoverfly on healthy aphid-free plants. The E. balteatus foraging and reproductive behaviors according to the volatile emission from aphid-infested plants are discussed in relation to the potential use of active infochemical molecules in integrated aphid pest management.

关键词： aphid infested behavior Episyrphus balteatus potato terpenes

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Characterization and Adsorption Study of Thymol on Pillared Bentonite

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Open Journal of Physical Chemistry 2014年第3期4卷 98-116页

作者： Mohamed El Miz Samira Salhi Ikrame Chraibi Ali El Bachiri marie-laure fauconnier Abdesselam Tahani Département de Géologie Faculté des Sciences Université Mohamed 1er Oujda Morocco LACPRENE Faculté des Sciences Université Mohamed 1er Oujda Morocco Unité de Chimie Générale et Organique Gembloux Agro-Bio Tech Université de Liège Gembloux Belgique

Pillared clay (PILC) was prepared from Moroccan clay and characterized, and its aqueous thymol adsorption capacities were studied using a batch equilibrium technique. So, we tested the encapsulation of thymol by aluminum pillared clay (PILC). The PILCs displayed a total surface area of 270 m2/g, a total pore volume of 0.246 cm3/g and an average pore diameter of 8.9 A, which corresponds to the size of Al13 forming the pillars between the clay layers. The adsorption capacity shown by the PILCs for thymol from water is close to 319 mg?g-1 for low solid/liquid ratio (0.2%). This result suggests that the PILCs have both hydrophobic and hydrophilic characteristics, as a result of the presence of silanol and siloxane groups formed during the pillaring and calcination of the PILCs. The experimental data were analyzed by the Freundlich and the Langmuir isotherm types for low values of equilibrium concentration. The rise of the isotherm in this range of concentrations was related to the affinity of thymol for clay sites, and the equilibrium data fitted well with the Freundlich model with maximum adsorption capacity of 319.51 mg/g for a ratio RS/L = 0.2%. Pseudo-first and pseudo-second-order kinetic models were tested with the experimental data and pseudo-first order kinetics was the best for the adsorption of thymol with coefficients of correlation R2 ≥0.986, and the adsorption was rapid with 90% of the thymol adsorbed within the first 20 min.

关键词： Clays Bentonite Thymol Adsorption Desorption Kinetics Pillared Clay

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CONCEPTUAL INTEGRATION

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外国语 2003年第2期26卷 2-7页

作者： Gilles fauconnier The University of California

Cognitive science research in the last twenty-five years has provided considerable evidence that reason is embodied. The neural architectures that evolved to produce perception, sensation, and bodily movement are at t... 详细信息

关键词：概念一体化认知语言学复杂性物质基础独立结构

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Preoperative rectosigmoid endoscopic ultrasonography predicts the need for bowel resection in endometriosis

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World Journal of Gastroenterology 2019年第6期25卷 696-706页

作者： Victor Desplats René-Louis Vitte Joseph du Cheyron Gilles Roseau Arnaud fauconnier Frédérick Moryoussef Department of Hepato-gastroenterology Centre Hospitalier Intercommunal Poissy Saint Germain Department of Statistics Centre Hospitalier Intercommunal Poissy Saint Germain Department of Gastroenterology H?pital Cochin Department of Obstetrics and Gynecology Centre Hospitalier Intercommunal Poissy Saint Germain University of Saint Quentin en Yvelines

BACKGROUND Rectosigmoid endometriosis is an underdiagnosed disease responsible for abdominal pain, transit disorders and rectal bleeding. Two surgical approaches,rectosigmoid bowel resection(segmental or patch) or intramuscular layer dissection(shaving), are *** To assess whether the lesion features observed via preoperative rectosigmoid endoscopic ultrasonography(RS-EUS) might predict the need for bowel *** This multicentric retrospective study was conducted on patients with rectosigmoid endometriosis who underwent a curative surgical procedure,evaluated by RS-EUS performed by two trained operators, between January 2012 and March 2018. A univariate statistical analysis was performed on nodules' RSEUS features(thickness, width, infiltration of the submucosae, presence of a bump into the digestive lumen and presence of multiple rectosigmoid localizations). A multivariate logistic regression was then performed on the significant *** Of the 367 patients, 73 patients with rectosigmoid endometriosis were evaluated by RS-EUS and underwent rectosigmoid surgery. After the univariate analysis was completed, thickness, width and infiltration of the submucosae were identified as potential predictive factors for bowel resection. In a multivariate logistic regression model, only thickness appeared to be a significant [odds ratio(OR) = 1.49, 95% confidence interval(CI): 1.04-2.12, P = 0.028] predictive factor for bowel resection. Receiver operating characteristic analysis performed showed that a thickness over 5.20 mm might be used as cut-off with a sensitivity of 76%, a specificity of 81%, and an area under carve = 0.82. The cut-off values for 100%sensitivity and 100% specificity were 0.90 mm and 10.00 mm, respectively. A trend concerning width to predict the need for resection was also observed(OR1.12, 95%CI: 1.00-1.26, P = 0.054)CONCLUSION The presence of a rectosigmoid nodule of endometriosis greater than 5.20 mm thick on RS-EUS might predi

关键词： Endometriosis Surgery Endoscopy Ultrasound Bowel disease Rectum and sigmoid

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Ten lectures on cognitive construction of meaning

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丛书名： Eminent linguists lecture series =

2010年

作者： fauconnier Gilles

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THE HIDDEN COMPLEXITIES OF METAPHOR

THE HIDDEN COMPLEXITIES OF METAPHOR

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第四届全国认知语言学研讨会

作者： Gilles fauconnier

＜正＞The study of metaphor has produced great insights over the last several decades, not only for the study of language, but also for the study of scientific discovery, design, mathematical thinking, and computer interfaces. Looking for conceptual mappings and their properties proves to be a rich method for discovery. To the initial studies that focused on cross-domain mappings and their most visible products have now been added many additional dimensions. Detailed studies have been carried out on topics such as compression, integration networks, and the principles and constraints that govern them.

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EMERGENT STRUCTURE IN INTEGRATION NETWORKS

EMERGENT STRUCTURE IN INTEGRATION NETWORKS

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第四届全国认知语言学研讨会

作者： Gilles fauconnier

＜正＞Compression in conceptual integration networks gives rise to a variety of mental patterns which include coonterfactuals, metaphor, and grammatical constructions. Novel dynamic structure is emergent in such networks. The present paper explores the notion of emergence. Data from mathematics, advertising, everyday metaphorical reasoning, and grammar is used to contrast the simplicity and familiarity of blended mental spaces with the complexity of emergent structures in full networks.

关键词： conceptual integration emergent structure compression mental spaces blending grammar.

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《我们的思维方式》述评

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当代语言学 2005年第1期7卷 80-85页

作者： G.fauconnier M.Turner 姚岚 210016 江苏南京南京航空航天大学外语系

(The Way We Think)一书的作者是***和***,2002年由Basic Books出版社出版.本书分为两部分,共十八章.第一部分论述网络模式,包括一至八章.第二部分论述概念整合是如何造就了认知意义上的现代人,从而使人与其他动物区分开来,包括九至十八章.

关键词：思维方式述评 Basic 2002年网络模式认知意义概念整合第二部分 Way 出版社第一部现代人

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《我们思考的方式》述评

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当代语言学 2006年第2期8卷 174-179页

作者： G．fauconnier M．Turner 李福印（述评）丁研（述评）不详北京航空航天大学外语系 100083

1．引言

关键词：概念整合理论概念合成理论述评 Think Basic Mark 研究成果网络模型最新发展理论要点

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