Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailComposition and biological activities of the essential oil of Nigella sativa seeds isolated by accelerated microwave steam distillation with cryogenic grinding
Alkoul, R; Benkaci-Ali, F; Zerrouki, M et al

in American Journal of Essential Oils and Natural Products (2014), 1(3), 23-33

In this study, essential oil of Sahara Nigella sativa L. was extracted using a rapid extraction, the microwave steam distillation (MSD) and the cryogenic grinding (CG). Two procedures have been ... [more ▼]

In this study, essential oil of Sahara Nigella sativa L. was extracted using a rapid extraction, the microwave steam distillation (MSD) and the cryogenic grinding (CG). Two procedures have been investigated, the MSD1 (seeds inside of oven apparatus) and MSD2 (seeds outside of oven apparatus). Forty-six compounds were identified and significant differences in quantities of the major constituents were observed, mainly were thymoquinone (CLG: 331.82-443.55 mg and CG: 272.95- 413.57 mg/100 g of seeds), p-cymene (CLG: 181.71-244.17 mg, CG: 369.80- 374.40 mg/100 g of seeds), dehydro-sabina ketone (CLG: 24.60- 25.83 mg, GC: 44.02-50.69 mg/100g of seeds), carvacrol (CLG: 10.32-10.96 mg, CG: 3.91-12.67 mg/100 g of seeds) and longifolene (CLG: 11.90- 16.43 mg, CG: 12.72-19.58 mg/100 g of seeds).Results showed that essential oils exhibit a good activity in each antioxidant system with a special attention for β-carotene bleaching test (IC50: 21 to 27 μg/ml) and reducing power (EC50: 9 to 14 μg/ml).The N. Sativa essential oils exhibited higher antibacterial and antifungal activities varying according to technique extraction and grinding mode used, with a high effectiveness against Gram-positive bacteria with a diameter of inhibition zones growth ranging from 9.5 to 35 mm and MIC and MBC values ranging from (0.042–0.10 mg/ml) to (0.20–0.75 mg/ml), respectively [less ▲]

Detailed reference viewed: 45 (3 ULg)
Peer Reviewed
See detailComposition and dynamics of the great Phanerozoic Evolutionary Floras
Cleal, Christopher J.; Cascales - Miñana, Borja ULg

in Proceedings of the XXIX Annual Meeting of the Spanish Society of Palaeontology (abstract book) (2013, October)

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailComposition and dynamics of the great Phanerozoic Evolutionary Floras
Cleal, Christopher J.; Cascales - Miñana, Borja ULg

in Lethaia (2014), 47(4), 469-484

Factor analysis of a data set representing the global distribution of vascular plant families through time shows the broad pattern of vegetation history can be explained in terms of five Evolutionary ... [more ▼]

Factor analysis of a data set representing the global distribution of vascular plant families through time shows the broad pattern of vegetation history can be explained in terms of five Evolutionary Floras. The Rhyniophytic (=Eotrachyophytic) Flora represents the very earliest (Silurian and earliest Devonian) vascular plants, notably the Rhyniophytopsida. The Eophytic Flora represents the early (Early-Middle Devonian) mainly homosporous land plants, notably the Zosterophyllopsida, Trimerophytopsida and early Lycopsida. The Palaeophytic Flora represents the Late Devonian and Carboniferous vegetation, which saw the introduction of heterospory among the spore producing plants and of early gymnosperms. The Mesophytic Flora first appeared in the Late Carboniferous and Permian macrofossil record, although there is palynological evidence of these plants having grown earlier in extra-basinal habitats and was dominated by gymnosperms with more modern affinities. The Cenophytic Flora that first appeared during Cretaceous times was overwhelmingly dominated by angiosperms. The end-Devonian, end-Triassic and end-Cretaceous mass-extinction events recognized in the marine fossil record had little impact on the diversity dynamics of these Evolutionary Floras. Rather, the changes between floras mainly reflect key evolutionary innovations such as heterospory, ovules and angiospermy. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Peer Reviewed
See detailComposition And Nutritive-Value For Rats Of Aspergillus-Niger Solid Fermented Barley
Mathot, Pierre; Debevere, Ch.; Walhain, Philippe et al

in Animal Feed Science & Technology (1992), 39(3-4), 227-237

Detailed reference viewed: 32 (1 ULg)
Full Text
Peer Reviewed
See detailComposition and orbits of language operations: finiteness and upper bounds
Charlier, Emilie ULg; Domaratzki, Michael; Harju, Tero et al

in International Journal of Computer Mathematics (2013), 90(6), 1171-1196

We consider a set of eight natural operations on formal languages (Kleene closure, positive closure, complement, prefix, suffix, factor, subword, and reversal), and compositions of them. If x and y are ... [more ▼]

We consider a set of eight natural operations on formal languages (Kleene closure, positive closure, complement, prefix, suffix, factor, subword, and reversal), and compositions of them. If x and y are compositions, we say x is equivalent to y if they have the same effect on all languages L. We prove that the number of equivalence classes of these eight operations is finite. This implies that the orbit of any language L under the elements of the monoid is finite and bounded, independently of L. This generalizes previous results about complement, Kleene closure, and positive closure. We also estimate the number of distinct languages generated by various subsets of these operations. [less ▲]

Detailed reference viewed: 41 (15 ULg)
Full Text
Peer Reviewed
See detailComposition And Physicochemical Extracted From Whole Seeds By Acid Properties Of Locust Bean Gum Or Water Dehulling Pre-Treatment
Dakia, Patrick; Blecker, Christophe ULg; Robert, Chiristelle et al

in Food Hydrocolloids (2008), 22(5),

Detailed reference viewed: 79 (4 ULg)
Full Text
See detailComposition and preparation of hydrogel nanocomposites with improved mechanical properties and use thereof
Herwats, Stéphane; Detrembleur, Christophe ULg; Alexandre, Michaël et al

Patent (2013)

Composition, preparation method and use of a hydrogel nanocomposite (HNC) material, containing one or more water soluble monomers (A), a water swelling clay mineral (B) with a high solubility in water ... [more ▼]

Composition, preparation method and use of a hydrogel nanocomposite (HNC) material, containing one or more water soluble monomers (A), a water swelling clay mineral (B) with a high solubility in water, and water itself(C), with added components resulting in a high compression modulus of the HNC material. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Peer Reviewed
See detailComposition and Thickness Dependence of GeSn Growth by Chemical Vapor Deposition
Wang, Wei; Shimura, Yosuke; Nieddu, Thomas ULg et al

Conference (2013, June 04)

Detailed reference viewed: 95 (1 ULg)
Full Text
See detailComposition chimique comparée des formations squelettiques chez les lophophoriens et les Endoproctes
Jeuniaux, Charles ULg

in Bulletin de la Société Zoologique de France (1982), 107(2), 233-249

Data concerning the chemical composition of exoskeletal structures in Lophophorates (Phoronida, Bryozoa, Brachiopoda) and in Entoprocta are presented and discussed. The inorganic composition is generally ... [more ▼]

Data concerning the chemical composition of exoskeletal structures in Lophophorates (Phoronida, Bryozoa, Brachiopoda) and in Entoprocta are presented and discussed. The inorganic composition is generally well established, as well as chitin distribution and quantitative importance. Proteins, which are often the most abundant constituants, are poorly known, except un the case of Brachiopod shells. [less ▲]

Detailed reference viewed: 2 (0 ULg)
Full Text
Peer Reviewed
See detailComposition chimique de l'endocarpe de Simarouba glauca D.C.
Lognay, Georges ULg; Ergo, A.; Wathelet, Jean-Paul ULg et al

in Revue Française des Corps Gras (1981), 4

Simarouba glauca D.C. Simaroubacées, plante arbustive à graines oléagineuses est fort intéressante pour les pays tropicaux non seulement à cause de sa grande résistance aux climats arides mais surtout ... [more ▼]

Simarouba glauca D.C. Simaroubacées, plante arbustive à graines oléagineuses est fort intéressante pour les pays tropicaux non seulement à cause de sa grande résistance aux climats arides mais surtout pour la source potentielle de matière grasse qu'elle représente. Dans un premier temps, les auteurs ont étudié l'amande de la graine de Simarouba. Dans cet artrcle, ils présentent pnncipalement une étude des lipides de I'endocarpe (coque) de cefte graine. lls déterminent la structure des triglycérides dont tes principaux sont du type : LnLL (11,88 %), OOO (9,87 %) LLL (5,63 %). StOP (7,23 %), LnLnL (6,77 %). OOP 16.47 %). [less ▲]

Detailed reference viewed: 77 (5 ULg)
Full Text
Peer Reviewed
See detailComposition chimique de la fraction "nacroine" de la conchioline de nacre de Nautilus Lamarck
Goffinet, G.; Jeuniaux, Charles ULg

in Comparative Biochemistry and Physiology (1968), 29

1. The study of the chemical composition of the conchiolin of mother-of-pearl of Nautilus pompilius Lamarck revealed that the insoluble residue in hot alkali, the nacroïn, is a mucoprotein (or ... [more ▼]

1. The study of the chemical composition of the conchiolin of mother-of-pearl of Nautilus pompilius Lamarck revealed that the insoluble residue in hot alkali, the nacroïn, is a mucoprotein (or glycoprotein). 2. The polysaccharidic fraction composing the prosthetic group of this mucoprotein is made, at least partially, of chitin. Chitin has been identified by means of purified chitinases. 3. In addition to this polyacetylglucosaminic fraction, an important amount of glucosamine has been identified in the nacrïn residue. 4. Prolonged treatment of the nacroïn in hot alkali leads to the progressive destruction of the peptidic chains, while the aminosaccharidic fraction remains unaltered. 5. It thus appears that chitin is the most stable component of the nacroïn, and consequently of the conchiolin of Nautilus mother-of-pearl. [less ▲]

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailComposition chimique de la fumée de tabac
Angenot, Luc ULg

in Journal de Pharmacie de Belgique (1983), 38(3), 172-180

The tobacco plant has been the object of extensive basic research about its genetic, culture, biochemistry and postharvest metabolism. In addition , much is known of its pyrolysis products and the ... [more ▼]

The tobacco plant has been the object of extensive basic research about its genetic, culture, biochemistry and postharvest metabolism. In addition , much is known of its pyrolysis products and the conditions that affect the formation of these products. Tobacco smaoke is a concentrated aerosol of liquid particles suspended in an atmosphere consisting mainly of nitrogen, oxygen and CO2. While the precise chemical composition of the particular and gaseous phases is depended on the characteristics of commercial tobacco and the manner in which it is smoked, both phases contained tens of hundreds of individual constituents. Notable among potentially hazardous constituents of smoke are tar (mainly benzopyrene) nicotine, HCN, acrolein, N-nitrosamines, cadmium and polonium 210. recent advances in tobacco science make it possible to develop a safer tobacco that delivers undesirable smoke compounds at levels that are below the old values, but these results are biologically uninterpretable at present. [less ▲]

Detailed reference viewed: 191 (2 ULg)
Full Text
Peer Reviewed
See detailComposition chimique de la theque de quelques thecamoebiens (protozoaires)
Saucin-Meulenberg, M.; Bussers, Jean-Claude ULg; Jeuniaux, Charles ULg

in Bulletin Biologique de la France et de la Belgique (1973), 107

The thecae of 7 species of Thecamoeba, belonging to 3 different families (Arcellidae, Plagiopyxidae, Difflugiidae) have been submitted to some chemical tests. In one species of Arcella, the theca was not ... [more ▼]

The thecae of 7 species of Thecamoeba, belonging to 3 different families (Arcellidae, Plagiopyxidae, Difflugiidae) have been submitted to some chemical tests. In one species of Arcella, the theca was not mineralized ; the inorganic constituents of the thecae of the 6 other species hawe been identified as SiO2. In 4 species, the silica flakes were protected by an organic cover, which explains the resistance offered by the thecae to fluorhydric acid. In the 7 species so far studied, the organic cement was found to be proteic in nature, and to be devoid of chitin or cellulose. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailComposition chimique des graines de pin d'Alep (Pinus halepensis Mill.) d'origine tunisienne et caracterisation de la fraction lipidique.
Cheikh Rouhou, S.; Hentati, B.; Besbes, Souhail et al

Poster (2006, May)

Detailed reference viewed: 245 (1 ULg)
Full Text
Peer Reviewed
See detailComposition chimique du nététu, condiment alimentaire produit par fermentation des graines du caroubier africain Parkia biglobosa (Jacq.) Benth.
Ndir, Babacar; Lognay, Georges ULg; Wathelet, Bernard ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2000), 4(2), 101-105

The seed oils and cakes of netetu of different origins available on the Senegalian market have been studied to evaluate the nutritional potentialities of this important food condiment used in many African ... [more ▼]

The seed oils and cakes of netetu of different origins available on the Senegalian market have been studied to evaluate the nutritional potentialities of this important food condiment used in many African countries. The total oil content ranged from 141 to 349 g.kg-1. Careful gas chromatography and GC-MS (Gas Chromatography-Mass Spectrometry) investigations revealed seven major fatty acids among which linoleic (41.9–46.8% of the total fatty acids), oleic (12.6–14.6%), palmitic (10.2–11.3%), stearic (10.0–13.4%), and behenic (12.6–13.4%) predominate. Significant differences were observed between fermented and non-fermented seeds as well as between netetu of different origins. The tocopherol content was found very low (17.7 to 30.6 mg.100g-1 fat). The total amino acid patterns showed that beside high level of proteins (331 à 540 g.kg-1) and interesting levels of essential constituents, there is an important deficiency of tryptophane, cysteine, methionine and threonine. [less ▲]

Detailed reference viewed: 350 (10 ULg)
Full Text
Peer Reviewed
See detailComposition chimique du tube d'un pogonophore (Siboglinum SP.) et des formations squelettiques de deux pterobranches
Foucart, M.F.; Bricteux-Grégoire, S.; Jeuniaux, Charles ULg

in Sarsia. North Atlantic Marine Science (1965), 20

The chemical composition of the skeletons of two species of pterobranchs, Cephalodiscus inaequatus (Andersson) and Rhabdopleura sp. of one pogonophore, Siboglinum sp., was studied quantitatively. The ... [more ▼]

The chemical composition of the skeletons of two species of pterobranchs, Cephalodiscus inaequatus (Andersson) and Rhabdopleura sp. of one pogonophore, Siboglinum sp., was studied quantitatively. The tubes of Siboglinum sp. are composed of proteins (about 47 %) and chitin (about 33 %) ; these two substances are probably associated in large amounts as glycoproteic complexes. The amino acid composition suggests that these proteins belong to the class of scleroproteins. Their composition is very differtent from that of collagen and keratin. On the contrary, the coenecium of the two pterobranchs does not contain any chitin and the amounts of proteins are much lower (19 %). The proteins are characterized by a very high proportion of glycine (35 % of the total amount of amino acids). [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailComposition chimique et activité antimicrobienne de l’huile essentielle de Thymus vulgaris du Nord d’Algérie
Sidali, L.; Brada, M.; Fauconnier, Marie-Laure ULg et al

in PhytoChem & BioSub Journal (2014), 8(3), 156-161

Twenty five constituents were identified by GC MS analysis of essential loils from. Thymus vulgaris. The main compounds identified were carvacrol (55,2%),γ-terpinene (12,6%), p-cymene (9,3%), linalol (3,9 ... [more ▼]

Twenty five constituents were identified by GC MS analysis of essential loils from. Thymus vulgaris. The main compounds identified were carvacrol (55,2%),γ-terpinene (12,6%), p-cymene (9,3%), linalol (3,9%) and α-terpinene (2,8%). The obtained Essential oils exhibited antibacterial and antifungal activities against S.P. Sterptococcus, staphylococcus aureus, E.coli, Klebscila and condidat albicans. [less ▲]

Detailed reference viewed: 182 (11 ULg)
Peer Reviewed
See detailComposition chimique et valeur alimentaire du pois protéagineux chez le porc en croissance.
Leterme, Pascal; Cors, François; Beckers, Yves ULg et al

in Revue de l’Agriculture = Landbouwtijdschrift (1989), 42(4), 683-693

Detailed reference viewed: 197 (7 ULg)
Peer Reviewed
See detailComposition chimique et valeur nutritionnelle pour les ruminants d'un ensilage de mycélium d'Aspergillus niger.
Thewis, André ULg; Petit, Pascal

in Annales de Zootechnie (1994), 43(3), 242

Detailed reference viewed: 61 (0 ULg)