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375 results on '"Genet, F."'

52. Browse species from Ethiopia: role in methane reduction and nematode control in goats

Author

Genet F. Mengistu, Wageningen University, Wouter Hendriks, and Wilbert Pellikaan

Subjects
goats, Animal Nutrition, Silage, Population, browsing, graasplanten, afgrazen, nematodenbestrijding, wormdrijvende eigenschappen, Rumen, Animal science, nematode control, PEG ratio, Dodonaea angustifolia, education, anthelmintic properties, Incubation, methaan, geiten, education.field_of_study, biology, methane, biology.organism_classification, Diervoeding, Horticulture, ethiopië, Proanthocyanidin, WIAS, ethiopia, browse plants, Haemonchus contortus
Abstract

The aim of the research reported in this thesis was to evaluate browse species collected from Ethiopia for preference by goats, and for their in vitro anthelmintic and methane (CH4) reduction properties. During the conduct of the studies observations were made warranting a further aim, to compare in vitro fermentation patterns of browse species using inocula from goats and cows kept on identical dietary regime. The preference of browse species using dry matter intake (DMI) as a proxy and in combination with polyethylene glycol (PEG), relationships between browse species intake and chemical composition were determined in Chapter 2. Air-dried leaves of Acacia etbaica, Cadaba farinosa, Capparis tomentosa, Dichrostachys cinerea, Dodonaea angustifolia, Euclea racemosa, Maerua angolensis, Maytenus senegalensis, Rhus natalensis and Senna singueana were used. Two cafeteria trials, each lasting 10 days were conducted using goats receiving a daily ration of grass hay and wheat bran, without (trial 1) or with (trial 2) the inclusion of PEG. Preference measured as the first 10 min browse DMI differed significantly among browse species and with PEG (P

Published
2017
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58. Browse species from Ethiopia: role in methane reduction and nematode control in goats

Author

Hendriks, Wouter, Pellikaan, Wilbert, Mengistu, Genet F., Hendriks, Wouter, Pellikaan, Wilbert, and Mengistu, Genet F.

Abstract

The aim of the research reported in this thesis was to evaluate browse species collected from Ethiopia for preference by goats, and for their in vitro anthelmintic and methane (CH4) reduction properties. During the conduct of the studies observations were made warranting a further aim, to compare in vitro fermentation patterns of browse species using inocula from goats and cows kept on identical dietary regime. The preference of browse species using dry matter intake (DMI) as a proxy and in combination with polyethylene glycol (PEG), relationships between browse species intake and chemical composition were determined in Chapter 2. Air-dried leaves of Acacia etbaica, Cadaba farinosa, Capparis tomentosa, Dichrostachys cinerea, Dodonaea angustifolia, Euclea racemosa, Maerua angolensis, Maytenus senegalensis, Rhus natalensis and Senna singueana were used. Two cafeteria trials, each lasting 10 days were conducted using goats receiving a daily ration of grass hay and wheat bran, without (trial 1) or with (trial 2) the inclusion of PEG. Preference measured as the first 10 min browse DMI differed significantly among browse species and with PEG (P<0.0001). Browse with higher tannin content, D. cinerea, R. natalensis and A. etbaica were the most preferred species regardless of PEG presence. Preference appeared to be based on digestible fibre fraction, hemicellulose rather than tannin levels in the browse species. Extracts of the 10 browse species were evaluated for their anthelmintic activity against Haemonchus contortus (Chapter 3). The larval exsheathment inhibition assay (LEIA) was applied using H. contortus third stage larvae (L3) in a dose dependent manner with extract concentrations of 0, 150, 300, 600, 1200 µg/ml phosphate buffered saline (PBS). The role of polyphenols in the inhibition against L3 was evaluated using polyvinylpolypyrrolidone (PVPP). All browse extracts significantly (P<0.0001) inhibited larval exsheathment in a dose dependent manner with the dose requi

Published
2017

68. GRB 081028 and its late time afterglow re-brightening

Author

Margutti, R., Genet, F., Granot, J., Barniol Duran, R., Guidorzi, Cristiano, Chincarini, G., Mao, J., Schady, P., Sakamoto, T., Miller, A. A., Olofsson, G., Bloom, J. S., Evans, P. A., Fynbo, J. P. U., Malesani, D., Moretti, A., Pasotti, F., Starr, D., Burrows, D. N., Barthelmy, S. D., Roming, P. W. A., and Gehrels, N.

Subjects
X-rays: individual (GRB081028), radiation mechanism: non-thermal, gamma-ray: bursts
Published
2010

72. Implication des macrophages dans l’initiation de la formation des paraostéoarthropathies après lésion médullaire

Author

Genet, F., primary, Vaquette, C., additional, Kulina, I., additional, Torossian, F., additional, Winkler, I., additional, Barbier, V., additional, Millard, S., additional, Pettit, A., additional, Sims, N., additional, Le Bousse-Kerdiles, M.C., additional, Lataillade, J.J., additional, Hutmacher, D., additional, and Levesque, J.P., additional

Published
2014
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81. GRB081028 and its late-time afterglow re-brightening

Author

Margutti..[et al.], R., Genet, F., Granot, R., Fynbo, Johan Peter Uldall, Malesani, Daniele, Margutti..[et al.], R., Genet, F., Granot, R., Fynbo, Johan Peter Uldall, and Malesani, Daniele

Published
2010

82. GRB 081028 and its late-time afterglow re-brightening

Author

Margutti....[et al.], R., Genet, F., Granot, J., Duran, R. B., Fynbo, Johan Peter Uldall, Malesani, Daniele, Margutti....[et al.], R., Genet, F., Granot, J., Duran, R. B., Fynbo, Johan Peter Uldall, and Malesani, Daniele

Published
2010

83. Late-time Observations of GRB 080319B: Jet Break, Host Galaxy, and Accompanying Supernova

Author

Tanvir, N., Rol, E., Levan, A., Svensson, K., Fruchter, A., Granot, J., O’Brien, P., Wiersema, K., Starling, R., Jakobsson, P., Fynbo, J., Hjorth, J., Curran, Peter, van der Horst, A., Kouveliotou, C., Racusin, J., Burrows, D., Genet, F., Tanvir, N., Rol, E., Levan, A., Svensson, K., Fruchter, A., Granot, J., O’Brien, P., Wiersema, K., Starling, R., Jakobsson, P., Fynbo, J., Hjorth, J., Curran, Peter, van der Horst, A., Kouveliotou, C., Racusin, J., Burrows, D., and Genet, F.

Abstract

The Swift-discovered GRB 080319B was by far the most distant source ever observed at naked-eye brightness,reaching a peak apparent magnitude of 5.3 at a redshift of z = 0.937. We present our late-time optical (HubbleSpace Telescope, Gemini, and Very Large Telescope) and X-ray (Chandra) observations, which confirm that anachromatic break occurred in the power-law afterglow light curve at~ 11 days post-burst. This most likely indicatesthat the gamma-ray burst (GRB) outflow was collimated, which for a uniform jet would imply a total energy inthe jet Ejet 1052 erg. Our observations also show a late-time excess of red light, which is well explained ifthe GRB was accompanied by a supernova (SN), similar to those seen in some other long-duration GRBs. Thelatest observations are dominated by light from the host and show that the GRB took place in a faint dwarf galaxy(r(AB) ˜ 27.0, rest frame MB ˜ -17.2). This galaxy is small even by the standards of other GRB hosts, whichis suggestive of a low-metallicity environment. Intriguingly, the properties of this extreme event—a small hostand bright SN—are entirely typical of the very low luminosity bursts such as GRB 980425 and GRB 060218.

Published
2010

84. Rise and fall of the X-ray flash 080330:an off-axis jet ?

Author

Guidorzi, C., Clemens, C., Kobayashi, S., Granot, J., Melandri, A., D'Avanzo, P., Kuin, N.~P.~M., Klotz, A., Fynbo, Johan Peter Uldall, Covino, S., Greiner, J., Malesani, D., Mao, J., Mundell, C.~G., Steele, I.~A., Jakobsson, P., Margutti, R., Bersier, D., Campana, S., Chincarini, G., D'Elia, V., Fugazza, D., Genet, F., Gomboc, A., Krühler, T., Küpcü Yoldas, A., Moretti, A., Mottram, C.~J., O'Brien, P.~T., Smith, R.~J., Szokoly, G., Tagliaferri, G., Tanvir, N.~R., Gehrels, N., Guidorzi, C., Clemens, C., Kobayashi, S., Granot, J., Melandri, A., D'Avanzo, P., Kuin, N.~P.~M., Klotz, A., Fynbo, Johan Peter Uldall, Covino, S., Greiner, J., Malesani, D., Mao, J., Mundell, C.~G., Steele, I.~A., Jakobsson, P., Margutti, R., Bersier, D., Campana, S., Chincarini, G., D'Elia, V., Fugazza, D., Genet, F., Gomboc, A., Krühler, T., Küpcü Yoldas, A., Moretti, A., Mottram, C.~J., O'Brien, P.~T., Smith, R.~J., Szokoly, G., Tagliaferri, G., Tanvir, N.~R., and Gehrels, N.

Abstract

Udgivelsesdato: May

Published
2009

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