References of "Sindic, Marianne"
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See detailConditioning materials with biomacromolecules: composition of the adlayer and influence on cleanability
Toure, Yetioman ULg; Genet, J. Michel; Dupont-Gillain, C. Christine et al

in Journal of Colloid and Interface Science (in press)

The influence of substrate hydrophobicity and biomacromolecules (dextran, bovine serum albumin - BSA) adsorption on the cleanability of surfaces soiled by spraying aqueous suspensions of quartz particles ... [more ▼]

The influence of substrate hydrophobicity and biomacromolecules (dextran, bovine serum albumin - BSA) adsorption on the cleanability of surfaces soiled by spraying aqueous suspensions of quartz particles (10 to 30 µm size), then dried, was investigated using glass and polystyrene as substrates. The cleanability was evaluated using radial flow cell (RFC). The surface composition was determined by X-ray photoelectron spectroscopy (XPS). The interpretation of XPS data allowed the complexity due to the ubiquitous presence of organic contaminants to be coped with, and the surface composition to be expressed in terms of both the amount of adlayer and the mass concentration of adlayer constituents. When soiled with a suspension of particles in water, glass was much less cleanable than polystyrene, which was attributed to its much lower water contact angle, in agreement with previous observations on starch soil. Dextran was easily desorbed and did not affect the cleanability. The presence of BSA at the interface strongly improved the cleanability of glass while the contact angle did not change appreciably. In contrast, soiling polystyrene with quartz particles suspended in a BSA solution instead of water did not change markedly the cleanability, while the contact angle was much lower and the aggregates of soiling particles were more flat. These observations are explained by the major role of capillary forces developed upon drying, which influence the closeness of the contact between the soiling particles and the substrate and, thereby, the adherence of particles. The capillary forces are proportional to the liquid surface tension and depend in a more complex way on contact angles of the particles and of the substrate. The dependence of cleanability on capillary forces, and in particular on the liquid surface tension, is predominant as compared with its dependence on the size and shape of the soiling aggregates, which influence the efficiency of shear forces exerted by the flowing water upon cleaning. [less ▲]

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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 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 detailDigestibilité et fermentation intestinale de deux sources de protéines animales, soumises ou non à un traitement thermique, chez le rat en croissance
POELAERT, Christine ULg; Despret, Xavier; Thewis, André ULg et al

in Nutrition Clinique et Metabolisme (2014, December), 28(Supplement 1), 176-177

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See detailL'analyse de risques, à dimension humaine au sein de mon organisation
Sindic, Marianne ULg; Delvosalle, Christian; Bruyr, Dominique et al

Scientific conference (2014, October 15)

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See detailValorization of Tunisian secondary date varieties (Phoenix Dactylifera L.) by hydrothermal treatments : New fiber concentrates with antioxidant properties
Mrabet, Abdessalem; Rodriguez-Gutierrez, Guillermo; Guillen-Bejarano, Rafael et al

in LWT - Food Science and Technology (2014)

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See detailBehavior of Listeria monocytogenes in sheep raw milk cheeses: a study at different stages of production and shelf-life"
N'Guessan, Elise; Amara, N.; Godrie, Thérèse ULg et al

Poster (2014, September 18)

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See detail2. Variétés - 1. Froment d'hiver
Meza Morales, Walter ULg; Couveur, Luc; Eylenbosch, Damien ULg et al

in Bodson, Bernard; Destain, Jean-Pierre (Eds.) Livre Blanc Céréales (2014, September 11)

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See detailEtude de l'effet du conditionnement, séchage et de la conservation par le froid sur la qualité des dattes au Maroc
El Yacoubi, O.; Elhoumaizi, A.; Sindic, Marianne ULg

Scientific conference (2014, May 15)

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See detailEvaluation de l'effet antidiabétique de l'huile du figuier de barbarie (Opuntia ficus-indica (L.) Mill.) (Communication orale)
Berraouan, A.; Mekhfi, H.; Ziyyat, A. et al

Scientific conference (2014, May 15)

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See detailIdentification de la composition en arômes des miels de la région orientale du Maroc (Communication orale)
Abeslami, Azzedine; Fauconnier, Marie-Laure ULg; Sindic, Marianne ULg et al

Scientific conference (2014, May 15)

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See detailINFLUENCE OF WHEY PROTEIN DENATURATION ON ADHERENCE
Toure, Yetioman ULg; Rouxhet, G. Paul; Dupont-Gillain, C. Christine et al

Conference (2014, April)

This work reports on the influence of -lactoglobulin (β-LGB) and of its denaturation on the adherence of quartz particles, taken as a model of particulate soil, on stainless steel AISI 304 with mirror ... [more ▼]

This work reports on the influence of -lactoglobulin (β-LGB) and of its denaturation on the adherence of quartz particles, taken as a model of particulate soil, on stainless steel AISI 304 with mirror finish. The substrate was soiled with quartz suspensions in water or in β-LGB solutions as such or previously heated at 75°C, and dried at room temperature or in an oven at 75°C. Cleanability was evaluated after exposure to water in a radial flow chamber. Auxiliary characterizations were the surface tension and protein concentration of the solution, surface analysis of the substrate by X-ray photoelectron spectroscopy (XPS) and contact angle measurements. The contact of stainless steel with -LGB led to adsorption of the protein, which dominated the composition of the organic layer with respect to contaminants initially present, and was not markedly desorbed upon rinsing. The presence of β-LGB at the quartz particle/substrate interface slightly increased the adherence, which was further increased when the protein was denatured. On the other hand, denaturation of -LGB enhanced its surfactant effect at the water/air interface. Comparison with systems investigated before suggests that the influence of protein via droplet spreading and soiling particles aggregation may be of minor importance compared to direct effects on the substrate/quartz interface. Stainless steel does not behave as a hydrophilic substrate owing to its surface contamination with organic compounds. It appears suitable to examine the influence of the initial surface state of stainless steel on its behavior regarding soiling and cleaning. [less ▲]

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See detailINFLUENCE OF WHEY PROTEIN DENATURATION ON ADHERENCE
Toure, Yetioman ULg; Rouxhet, G. Paul; Dupont-Gillain, C. Christine et al

in Dr Wilson, I.; Chew, Y.M.J. (Eds.) Fouling and Cleaning in Food Processing (2014, April)

This work reports on the influence of -lactoglobulin (β-LGB) and of its denaturation on the adherence of quartz particles, taken as a model of particulate soil, on stainless steel AISI 304 with mirror ... [more ▼]

This work reports on the influence of -lactoglobulin (β-LGB) and of its denaturation on the adherence of quartz particles, taken as a model of particulate soil, on stainless steel AISI 304 with mirror finish. The substrate was soiled with quartz suspensions in water or in β-LGB solutions as such or previously heated at 75°C, and dried at room temperature or in an oven at 75°C. Cleanability was evaluated after exposure to water in a radial flow chamber. Auxiliary characterizations were the surface tension and protein concentration of the solution, surface analysis of the substrate by X-ray photoelectron spectroscopy (XPS) and contact angle measurements. The contact of stainless steel with -LGB led to adsorption of the protein, which dominated the composition of the organic layer with respect to contaminants initially present, and was not markedly desorbed upon rinsing. The presence of β-LGB at the quartz particle/substrate interface slightly increased the adherence, which was further increased when the protein was denatured. On the other hand, denaturation of -LGB enhanced its surfactant effect at the water/air interface. Comparison with systems investigated before suggests that the influence of protein via droplet spreading and soiling particles aggregation may be of minor importance compared to direct effects on the substrate/quartz interface. Stainless steel does not behave as a hydrophilic substrate owing to its surface contamination with organic compounds. It appears suitable to examine the influence of the initial surface state of stainless steel on its behavior regarding soiling and cleaning. [less ▲]

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See detailBiodiversity and utilizations of pearl millet cultivars in hyper-arid regions of Algeria.
Boudries, Nadia; Sindic, Marianne ULg; Belhaneche-Bensamra, Naima et al

Poster (2014, March 27)

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See detailL'âge d'abattage influence-t-il la qualité de la viande?
De Maeseneire, Coraline ULg; Sindic, Marianne ULg; Colot, Catherine et al

Article for general public (2014)

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See detailWelke impact heeft de slachtleeftijd bij vleeskuikens op de zintuiglijke eigenschappen van het vlees?
De Maeseneire, Coraline ULg; Sindic, Marianne ULg; Colot, Catherine et al

Article for general public (2014)

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See detailComparative study of volatile secondary metabolite of Cistus libanotis during different process
Zidane, H.; Fauconnier, Marie-Laure ULg; Sindic, Marianne ULg et al

in Journal of Chemical and Pharmaceutical Research (2014), 6(8), 281-287

Chemical composition of the essential oils of Cistus libanotis from eastern Morocco (Tafoughalt and Jerrada) extracted from different season was analyzed by GC-MS and GC-FID. The hydro-distilled essential ... [more ▼]

Chemical composition of the essential oils of Cistus libanotis from eastern Morocco (Tafoughalt and Jerrada) extracted from different season was analyzed by GC-MS and GC-FID. The hydro-distilled essential oil content ranged from 0, 27 % to 0, 46%, the maximum amounts were observed in summer while minimum in winter for Tafoughalt, whereas the oil obtained from Jerrada had the highest yield (0, 61 %). The essential oils consisted of terpineol-4 as the most abundant component (18, 70 % - 24, 91 %), followed by γ-terpinene (9, 82 % - 12, 25 %), camphene (5, 86 % - 13, 58 %), sabinene (7, 86 % - 9, 89 %) and α-thujene (6, 92 % - 10, 12 %). Samples collected in all seasons were found to be richer in monoterpenes hydrocarbons (52, 68 % - 57, 59 %). None sesquiterpene hydrocarbons found in the oils from summer and autumn. Drying period of leaves at normal air laboratory and distillation time also affect the oil content and composition. There was variation in terpineol-4 content from 22, 23 % (4th day of drying) to 19, 27 % (29th day of drying), and from 35, 60 % (1 hour of distillation) to 24, 17 % (4 hours of distillation). It can be concluded that the harvesting season, period of drying and the time of distillation had an effect on the yield of essential oil and chemical composition of various compounds. [less ▲]

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