References of "Fauconnier, Marie-Laure"
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See detailBiochemical characterisation of the seed oils of four safflower (Carthamus tinctorius) varieties grown in north-eastern of Morocco
Ben Moumen, Abdessamad; Mansouri, Farid; Richard, Gaetan ULg et al

in International Journal of Food Science & Technology (2015)

The quality of the oil of four safflower varieties, originating from Spain (Rancho), India (Sharda) and Morocco (Cartamar and Cartafri), which were cultivated at the experimental station in Oujda (a semi ... [more ▼]

The quality of the oil of four safflower varieties, originating from Spain (Rancho), India (Sharda) and Morocco (Cartamar and Cartafri), which were cultivated at the experimental station in Oujda (a semi-arid region of eastern Morocco) was evaluated through analysis of their phenolic and carotenoid contents. The composition of the phenolic compounds of safflower oil has not yet been documented. Therefore, in this preliminary study, Thirty different phenolic compounds were identified, and significant differences between the oil varieties were observed (P < 0.05). In the seed oil from the Rancho and Sharda safflower varieties, the main phenolic compound was trans-chalcone, representing 13.45% and 11.8%, respectively, of the total phenolics, whereas in Cartamar and Cartafri oils, naringin accounted for 26.82% and 16.5%, respectively, of the total phenolics. The total carotenoid contents ranged from 1.13 mg/kg (Rancho) to 1.34 mg/kg (Cartamar and Cartafri).We observed that b-cryptoxanthin (0.31–0.37 mg/kg) and b-carotene (0.3–0.35 mg/kg) were the predominant carotenoids in all of the safflower oils that were studied. [less ▲]

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See detailPhytosterols composition of virgin olive oils from cultivars introduced in eastern Morocco in comparison to Picholine Marocaine
Mansouri, F.; Ben Moumen, A.; Richard, Gaetan ULg et al

in Journal of Materials and Environmental Science (2015), 6(8), 2322-2329

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of three European cultivars (Arbequina, Arbosana and Koroneiki), grown under high-density plantation system in eastern ... [more ▼]

The aim of this study is to characterize monovarietal virgin olive oils (VOOs) of three European cultivars (Arbequina, Arbosana and Koroneiki), grown under high-density plantation system in eastern Morocco, by comparison of their phytosterols profiles. First, physicochemical properties of these monovarietal VOOs as well as their contents of pigments and phenols were analyzed. Then, VOOs phytosterols profiles were determined by GC-FID, and show that b-sitosterol is the most abundant sterol which represent 75 to 79 % of total phytosterols in analyzed olive oils. On the basis of these results, a comparison between these monovarietal VOOs and olive oil of Picholine marocaine (autochthonous olive tree) has been carried out, and shows that majority of analytical parameters presented statistically significant differences (p < 0.05). The examined olive varieties produce excellent oils with a chemical composition within the regulatory limits and an appreciable amount of phytosterols. In addition, results showed that, total phytosterols content of olive oil from Picholine marocaine is significantly higher (2348.78 mg kg-1) than values observed for VOOs of European cultivars, which range from 1595 to 1971mg kg-1 but, Koroneiki’s VOO has the highest phenols content (493.66 mg kg-1) and the highest pigments content (3.94 and 2.17 mg kg-1 respectively for chlorophylls for carotenoids). Lastly, according to VOOs' content of minor components (phenols, pigments and phytosterols), the hierarchical cluster analysis shows a good discrimination between olive tree varieties. [less ▲]

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See detailChemical Composition and Antioxidant Activity of seeds oils and fruit juice of Opuntia Ficus Indica and Opuntia Dillenii from Morocco
Ghazi, Z.; Ramdani, M.; Tahri, M. et al

in Journal of Materials and Environmental Science (2015), 6(8), 2338-2345

This study provides basic information on the mineral composition of the seeds and antioxidant activity in seeds oils and fruit juices of cactus belonging to two species Opuntia ficus indica and Opuntia ... [more ▼]

This study provides basic information on the mineral composition of the seeds and antioxidant activity in seeds oils and fruit juices of cactus belonging to two species Opuntia ficus indica and Opuntia dillenii, from Morocco (Oujda), in order to evaluate the nutritional value of the Opuntia extracts. Minerals determined from dry seeds of Opuntia ficus indica and Opuntia dillenii were: calcium 480.93 and 408.28; phosphorus 1417.59 and 970.15; potassium 304.51 and 201.96; magnesium: 316.59 and 240.30; sodium: 48.33 and 18.18; zinc: 70.77 and 78.26 mg/100g respectively. The main fatty acids of Opuntia ficus indica and Opuntia dillenii seed oil were respectively: linoleic acid: 58.79 and 79.83%, Palmitic acid: 11.18 and 13.52%. The antioxidant activity of Opuntia ficus indica and Opuntia dillenii seed oils and fruit juices were assessed by means of 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging assay and ascorbic acid test. The results showed that the antioxidant activities of Opuntia ficus indica and Opuntia dillenii seed oil (IC50 = 19.79 ± 0.023 and 27.21 ± 0.075 μL/mL) are higher than that of the reference ascorbic acid (IC50 = 16.56 ± 0.019 μg/mL). However, the Opuntia dillenii juice presents antioxidant activity more important than this of Opuntia seed oil and ascorbic acid. It possessed strong antioxidant activity (IC50 = 8.18 μL/mL). The antioxidant activity of the seed oil and juice were also found to be concentration-dependent. [less ▲]

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See detailVariations in the phytosterol and tocopherol compositions and the oxidative stability in seed oils from four safflower (Carthamus tinctorius L) varieties grown in north-eastern Morocco
Ben Moumen, Abdessamad; Mansouri, Farid; Richard, Gaetan ULg et al

in International Journal of Food Science and Technology (2015), 50(10), 22642270

Phytosterol and tocopherol contents and oxidative stability were evaluated from seeds oils of four safflower (Carthamus tinctorius L) varieties originating from Spain (Rancho), India (Sharda) and Morocco ... [more ▼]

Phytosterol and tocopherol contents and oxidative stability were evaluated from seeds oils of four safflower (Carthamus tinctorius L) varieties originating from Spain (Rancho), India (Sharda) and Morocco (Cartamar and Cartafri), which were cultivated at the experimental station in Oujda (a semi-arid region of eastern Morocco). Total phytosterols ranged from 3640 to 4140 mg kg -1. GC analysis allowed the identification of nine compounds, of which b-sitosterol was the major component. Total tocopherols ranged from 461.56 to 499.68 mg kg -1. HPLC analysis allowed the identification of three compounds,a-tocopherol (99.45%–98.84%), b-tocopherol (0.94%–0.5%) and c-tocopherol (0.21%–0.01%). Oxidative stability study showed that Sharda had the lowest induction period of 2.3 h compared with 7.18, 7 and 6.67 h for Cartafri, Rancho and Cartamar, respectively. Likewise, we established a positive correlation between the oxidative stability and c-tocopherol; however, this difference was not significant. [less ▲]

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See detailReview on the potential technologies for aromas recovery from food industry flue gas
Wylock, Christophe; Elloundou Mballa, Pierre Patrick; Heilporn, C. et al

in Trends in Food Science & Technology (2015), 46(1), 68-74

Background: Food-processing gaseous effluents are rich in flavoured volatile organic compounds (FVOCs). The discharge of these FVOCs is unwanted as they can contribute to the environmental olfactive ... [more ▼]

Background: Food-processing gaseous effluents are rich in flavoured volatile organic compounds (FVOCs). The discharge of these FVOCs is unwanted as they can contribute to the environmental olfactive pollution. Scope and approach: Their recovery would then enable their valuation through the strengthening of the organoleptic properties of the finished products or their use in other products, as well as reducing the pollution linked to their discharge. However, there are only a few documents in the literature concerning food aromas recovery from gaseous effluents. This paper reviews the used or potential technologies for the recovery of aromas from gaseous effluents in the food-processing industry. Key findings and conclusions: The technologies that are already applied in the food processing industry for aroma recovery from gaseous effluents are the vapour permeation and the condensation. The adsorption and the absorption are technologies used for scrubbing volatile organic compounds, which can be potentially used for gaseous aroma recovery. [less ▲]

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See detailTechnological Features of Selected Kivuguto Strains during Milk Fermentation
Karenzi, Eugène; Fauconnier, Marie-Laure ULg; Destain, Jacqueline ULg et al

in Bioengineering and Bioscience (2015), 3(2), 13-22

Kivuguto milk is a traditional fermented milk of Rwanda. A previous study allowed for the selection of three bacteria involved in the fermentation process. The aim of the present work is the technological ... [more ▼]

Kivuguto milk is a traditional fermented milk of Rwanda. A previous study allowed for the selection of three bacteria involved in the fermentation process. The aim of the present work is the technological characterization of kivuguto strains for its production in the dairy industry. Acidification, proteolysis, the flavor compound profile, rheology and sensory analyses of fermented milks were assessed as important indicators of the starter culture formulation. Acidification showed that kivuguto milk ferments in 14 hours at 19°C with a titratable acidity of 73°D. The samples of CWBI-B1466 Lactococcus lactis and CWBI-B1470 Leuconostoc pseudomesenteroides had fermentation times of 14 h and 20 h, respectively. All samples were viscoelastic fluids, and the most important flavor compounds found were two alcohols, one ester and two furan derivative compounds. Proteolysis revealed low values ranging to 3.04-5.45 mg.L-1, which is very interesting in terms of taste acceptability. The three strains showed positive technological properties for kivuguto starter culture development and the data are fully in agreement with the preliminary results of the technological analyses. The findings revealed similarities between the formulated kivuguto and the traditional kivuguto as recognized by a tasting panel in a discrimination test. Ultimately, this study allowed for the formulation of kivuguto milk using three bacteria, prior to studying the stability of these properties during storage under refrigeration, which is the last stage before industrial production of kivuguto milk can begin. [less ▲]

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See detailVolatile organic compounds emitted by Cavendish and Plantain banana plants
De Clerck, Caroline ULg; Kherkhofs, Celine; Berhal, Chadi et al

Poster (2015)

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See detailChemical composition and antibacterial activitiy of the essential oils of Algerian Myrtus communis L.
Hennia, Aïcha; Brada, Moussa; Nemmiche, Saïd et al

in Journal of Essential Oil Research (2015)

Myrtus communis L. leaf essential oils from Algeria were analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). A total of thirty-four components were identified accounting ... [more ▼]

Myrtus communis L. leaf essential oils from Algeria were analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). A total of thirty-four components were identified accounting for 95% of the oil. The main compounds were limonene (23.4%), linalool (15.4%), geranyl acetate (10.9%), α-pinene (10.7%), linalyl acetate (8.2%) and 1,8-cineole (6.6%).The antimicrobial evaluation showed that myrtle oil exhibited good antibacterial activity against Staphylococcus aureus, Proteus mirabilis and Kleibsiella pneumonia, but differed according to the strains. Conversely, it was not active against Pseudomonas aeruginosa. [less ▲]

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See detailThe Chemical compositions and the Antioxidant and Antimicrobial Activities of the Essential Oil of Rosemary Leaves from Eastern Morocco
Tahri, Mustapha; Imelouane, Bouchra; Amhamdi, Hassan et al

in Journal of Materials and Environmental Science (2015), 6(3), 666-672

The essential oils compositions of Rosmarinus. tournefortii wild plant, Rosmarinus. tournefortii domesticated plant, and Rosmarinus officinalis.L wild plant growing in different bio climates from eastern ... [more ▼]

The essential oils compositions of Rosmarinus. tournefortii wild plant, Rosmarinus. tournefortii domesticated plant, and Rosmarinus officinalis.L wild plant growing in different bio climates from eastern Morocco, was determined by GC-FID and GC–MS. Oils were assessed for their antimicrobial and antioxidant activities. A variation of chemical compositions attributed to varieties rather than to bio climates was revealed. α-Pinene (0.637% ; 44.22% ; 5.74%), Camphene (11.62% ; 6.52% ; 2.21%), ß-Pinene (14.72% ; 1.14% ; 3.71%), 1,8-Cineole (10.1% ; not identifying ; 56.51%) and Camphor (39.27% ; 7.64% ; 13.56%) were identified as the main constituents of R. tournefortii wild plant, R. tournefortii domesticated plant, and R. officinalis. L wild plant respectively. This study is based on the determination of the diameter of inhibition to moderate antimicrobial and antioxidant activities of oils revealed to be against eight bacteria tested. This was determined by 1,1-diphenyl-1-picrylhydrazyl (DPPH) assay. The highest antimicrobial and antioxidant activities were found in oils from Rosmarinus. tournefortii domesticated plant. [less ▲]

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See detailRecherches de lignées aromatiques d’Abies par hybridation somatique
Fauconnier, Marie-Laure ULg; Druart, Philippe

Report (2015)

L’objectif du projet de recherche est d’associer les caractéristiques de croissance d’A. nordmanniana aux propriétés aromatiques d’autres espèces d’Abies en suivant la voie de la fusion somatique. Les ... [more ▼]

L’objectif du projet de recherche est d’associer les caractéristiques de croissance d’A. nordmanniana aux propriétés aromatiques d’autres espèces d’Abies en suivant la voie de la fusion somatique. Les travaux de recherche en culture "in vitro" sont menés au laboratoire de l’Unité de Génie biologique du Département "Science du Vivant" du CRAW (section 1) tandis que les analyses relatives à la détermination des profils aromatiques sont réalisées dans le laboratoire de l'Unité chimie générale et organique de l'Université de Liège-Gembloux Agro- Bio-Tech (section 2). Les deux Unités de recherche ont poursuivi leurs activités en parfaite collaboration. La première a tenté de restituer ou garder les propriétés embryogènes au travers de protoplastes provenant de lignées embryogènes d’A. nordmanniana, d’induire l’embryogenèse somatique sur des tissus d’embryons zygotiques d’autres Abies aromatiques et de réaliser des fusions somatiques en associant des protoplastes à des cellules de têtes d’embryons. La seconde s’occupait de caractériser les composés aromatiques, de suivre leur évolution selon période de végétation, de distinguer les espèces entre elles selon le profil aromatique de leurs graines tandis qu’en parallèle, elle mettait au point les techniques d’analyses en conditions aseptiques sur des lignées embryogènes d’A. nordmanniana d’origines génétiques différentes et sur les masses issues de fusions potentielles intra ou interspécifiques avec A. balsamea. [less ▲]

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See detailPhytochemical Study of Plants of Interest for Cosmetics in Mayotte
Saive, Matthew ULg; Fauconnier, Marie-Laure ULg; Danflous, Jean-Paul

Poster (2014, December 16)

This study takes place in a bigger project aiming to identify and to make an inventory of the French Pharmacopeia. Its aim is to identify plants or plant families regularly used in traditional cosmetics ... [more ▼]

This study takes place in a bigger project aiming to identify and to make an inventory of the French Pharmacopeia. Its aim is to identify plants or plant families regularly used in traditional cosmetics in Mayotte. In order to give a direction to the research, two technics where used. At first, the plants and their families used in the pharmacopeia of neighboring regions were inventoried using the literature. The resulting inventory was then compared with the flora of the Mahoran territory. The second technique was the realization of a semi-structured survey with people known for their plant-use knowledge in Mayotte. In order to have significant results, the ethnobotanical survey was done following Trotter & Logan’s protocol. (1986) According to that protocol, the gathered data has to be the following: common name, place of harvest, part used and the posology. Moreover the number of informant has to be big enough in order to integrate the data in several indicators such as: The informant agreement ration (IAR), the fidelity level (FL) and use value (UV). The number of informant was determined based on the population density of the different communes of the island. Another critical factor for this study is the correct identification of each sample. To achieve that when a sample was realized, it was taken twice. One for the analysis, the second sample was pressed and dried so as to enter a herbarium for identification. The last important step of this part of the study is the development of fast technics to establish the samples’ physiological activity. These test will give us qualitative information in order the isolate the plants that show a true potential. The targeted activities and tests being: - Anti-tyrosinase activity through an inhibition of tyrosinase test. - Anti-free-radicals activity through the DPPH test. - Anti-inflammatory activity through an inhibition of lipoxygenase an cyclooxygenase test The following steps of the study is the complete analysis of the physiologically active plants extracts in order to identify the active molecules. The end of the study will result in the creation of cosmetics originating from Mayotte’s flora. The way the cosmetics will be developed is thought so as it can be easily and durably done in Mayotte allowing this study to have a positive impact on the development of the island. [less ▲]

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See detailBelowground Chemical Ecology: The Case of Wireworms
Barsics, Fanny ULg; Delory, Benjamin ULg; Delaplace, Pierre ULg et al

Conference (2014, December 13)

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See detailEvaluation of the oxidative stability of blends of ‘Arbequina’ olive oils with other monovarietal olive oils
Mansouri, F.; Ben Moumen, A.; Houmy, N. et al

in Olivae (Official Journal of the International Olive Council) (2014), 120

Like elsewhere in the Mediterranean, the olive oil sector is one of the strategic branches of the Moroccan economy owing to its social and economic significance. This research entailed evaluation of the ... [more ▼]

Like elsewhere in the Mediterranean, the olive oil sector is one of the strategic branches of the Moroccan economy owing to its social and economic significance. This research entailed evaluation of the oxidative stability of olive oils made up of a blend of ‘Arbequina’ olive oil with ‘Arbosana’ and ‘Koroneiki’ monovarietal oils known for their high content of natural antioxidants (phenols and tocopherols) and their superior oxidative stability compared with ‘Arbequina’ oil. The monovarietal oils produced from the ‘Arbequina’, ‘Arbosana’ and ‘Koroneiki’ varieties, which have recently been introduced under intensive cultivation in the eastern region of Morocco, underwent physico–chemical characterisation to determine quality criteria, natural antioxidant content, fatty acid composition and triacylglycerol profile. The Rancimat test* was performed to assess the oxidative stability of these monovarietal oils and their three-variety blends. The oxidation tests were performed on five freshly prepared blends (A) of the three varieties – ‘Arbequina’/’Arbosana’/‘Koroneiki’ – according to the following volume ratios: A1: 60/30/10; A2: 60/20/20; A3: 60:10:30; A4: 50:25:25 and A5: 40:30:30. The test results show that blends A4 and A5 displayed the best oxidative stability, recording respective values of 72.67 h and 75.42 h. These results are comparable to those obtained for ‘Arbosana’ monovarietal oil (75.42 h), which is considered to be relatively stable. Hence, blending is an excellent tool for enhancing oils produced from varieties which, despite their excellent initial quality and their organoleptic attributes, are handicapped by their poor stability, as is the case of ‘Arbequina’ oil. [less ▲]

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See detailAllelopathic and autotoxicity effects of barley (Hordeum vulgare L. ssp. vulgare) root exudates
Bouhaouel, Imen; Gfeller, Aurélie; Fauconnier, Marie-Laure ULg et al

in BioControl (2014), Online First

The allelopathic activity of barley (Hordeum vulgare L. ssp. vulgare) root exudates was studied by comparing their effects on seedling establishment in barley itself and in two weed species, Bromus ... [more ▼]

The allelopathic activity of barley (Hordeum vulgare L. ssp. vulgare) root exudates was studied by comparing their effects on seedling establishment in barley itself and in two weed species, Bromus diandrus Roth. and Lolium rigidum Gaudin, using an original laboratory protocol, named ‘seed-after-seed’. In this protocol, the donor and the receiver species of watersoluble allelochemicals are grown one after the other in the same dishes, in conditions reducing resource competition between both species. Growth of all receptive species (weeds and barley) was inhibited in a dose-dependent manner, when using increasing barley seed densities (0, 8, 19 and 25 seeds per Petri dish). In our conditions, the barley varieties and landraces exhibited different allelopathic activities against weeds or barley. The allelopathic potential of the barley root exudates was also dependent on the receiver species. Indeed, the released allelochemicals proved to be more toxic against the weed plants than on barley itself. Furthermore, the toxicity of the allelochemicals increased after their release by roots, between day 0 and day 6. These allelochemicals might contribute to the plant community dynamics and their usefulness as bio-herbicides deserves further consideration. [less ▲]

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See detailSurfactin interaction with model plant plasma membrane
Luzuriaga Loaiza, Walter ULg; Nasir, Mehmet Nail ULg; Lins, Laurence ULg et al

Poster (2014, October 20)

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See detailAnalysis of the interactions of natural elicitor rhamnolipids with plant plasma membranes by in silico methods
Polo Lozano, Damien ULg; Nasir, Mehmet Nail ULg; Deleu, Magali ULg et al

Poster (2014, October 20)

Rhamnolipids are surface active molecules produced mainly by various strains of the bacterium Pseudomonas aeruginosa. These secondary metabolites are composed of one to three fatty acids with various ... [more ▼]

Rhamnolipids are surface active molecules produced mainly by various strains of the bacterium Pseudomonas aeruginosa. These secondary metabolites are composed of one to three fatty acids with various chain lengths linked through a glycosidic bond to one or two rhamnose moieties. The fatty acids are linked together through an ester bond. These molecules have shown several biological activities including plant defense stimulation. It has be suggested that this elicitor activity could be related to an interaction of rhamnolipids with the lipid bilayer of the plant plasma membrane (PPM) and lead to its destabilization, which can activate the plant defense signaling pathways. In this context, interactions of two rhamnolipids (Rha-C10-C10 and Rha-Rha-C10-C10) with membrane models and lipidic constituents of the PPM were investigated using in silico approaches. Most probable chemical structures of the rhamnolipids were determined using the STRUCTURE TREE procedure according to the molecule potential energy. The ability of these rhamnolipid structures to insert within the PPM was assessed using IMPALA simulations. IMPALA uses a membrane model in which phospholipids molecules are implicitly modeled by an empirical function and the membrane properties are modeled by energetic restraints. The ability of each rhamnolipid structure to form an assembly with several PPM constituents (phospholipid (PLPC), sterols (Sitosterol, Stigmasterol, Campesterol) and sphingolipids (GIPC, Glucosylceramide)) was calculated using the HYPERMATRIX procedure, which calculate and minimize the energies of interaction between all molecules of the complex until the lowest energy structure is reached. [less ▲]

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See detailScreening of elicitor candidates on winter wheat against Septoria tritici
Le Mire, Géraldine ULg; Deleu, Magali ULg; Ongena, Marc ULg et al

Scientific conference (2014, October 14)

The various experiments to be held prior to elicitor screening are detailed, along with the screening metholodogy. Explanation is given on the increasing interests of plant elicitors, or "stimulators of ... [more ▼]

The various experiments to be held prior to elicitor screening are detailed, along with the screening metholodogy. Explanation is given on the increasing interests of plant elicitors, or "stimulators of natural defenses", for the sustainability of our agro-ecosystems. [less ▲]

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