References of "Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE]"
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See detailSynthèse des connaissances sur la déshydratation osmotique
Bchir, Brahim ULg; Besbes, Souhail; Giet, Jean-Michel ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 131-144

Among the preservation processes of vegetal products, osmotic dehydration presents an economic and a nutritional interest. This technique consumes a low quantity of energy, prolongs the period of ... [more ▼]

Among the preservation processes of vegetal products, osmotic dehydration presents an economic and a nutritional interest. This technique consumes a low quantity of energy, prolongs the period of availability of foodstuffs, and gives new and appreciated sensory properties to products. Therefore, the producers can sell their productions at better prices and the consumers are able to consume fruits and vegetables throughout the year. This technique is very easy to set up, especially in the developing countries due to its low cost. The aim of this article is to present a synthesis of the literature concerning the osmotic dehydration technique, and also to specify the new tendencies and directions of recent research. [less ▲]

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See detailPredictive modelling of the combined effect of temperature and water activity (aw) on the in vitro growth of Erwinia spp infecting potato tubers in Belgium
Moh, Augustin; Massart, Sébastien ULg; Lahlali, Rachid et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(3), 378-386

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See detailÉnergie nécessaire au broyage de la biomasse et des produits densifiés
Temmerman, Michaël ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011)

La littérature concernant la consommation énergétique du broyage dans les industries minières montre que cette problématique a été, et est encore, étudiée par de nombreux auteurs. Différents modèles de ... [more ▼]

La littérature concernant la consommation énergétique du broyage dans les industries minières montre que cette problématique a été, et est encore, étudiée par de nombreux auteurs. Différents modèles de broyage sont donc disponibles pour ces industries, en particulier pour le broyage des minerais. Les principaux modèles et certaines de leurs évolutions sont repris dans la présente revue. Le broyage de la biomasse quant à lui a été bien moins étudié. Quelques études ont néanmoins porté sur la mesure des consommations énergétiques engendrées par le broyage de biomasses particulières, dans des systèmes particuliers. Rares sont celles qui prennent en compte suffisamment de paramètres relatifs à la matière entrante et sortante (granulométrie, humidité, origine, etc.) ou les caractéristiques du système de broyage. Pratiquement, aucun modèle de broyage de la biomasse n’a donc été proposé. Concernant le broyage des produits densifiés, aucune donnée ne semble disponible. À la lueur des théories de broyage de l’industrie minière, cette étude propose donc les paramètres à prendre en compte pour une éventuelle modélisation du broyage de la biomasse et des produits densifiés. Mots-clés. Broyage, biomasse, pellets, briquettes, théories [less ▲]

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See detailBeneficial effect of the rhizosphere microbial community for plant growth and health.
Nihorimbere, V.; Ongena, Marc ULg; Smargiassi, M. et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 327-337

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See detailLes oligosaccharides pectiques: production et applications possibles
Combo, Agnan Marie Michel ULg; Mario, Aguedo ULg; Paquot, Michel ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 153-164

Les oligosaccharides pectiques ou POS sont des fragments de composition complexe issus de la dégradation chimique, physique ou enzymatique de la pectine. Du fait de l’intérêt de leurs propriétés ... [more ▼]

Les oligosaccharides pectiques ou POS sont des fragments de composition complexe issus de la dégradation chimique, physique ou enzymatique de la pectine. Du fait de l’intérêt de leurs propriétés biologiques, les oligosaccharides pectiques font l’objet de nombreuses études et trouvent aujourd’hui des applications dans des domaines aussi différents que la médecine, l’agriculture et l’industrie agro-alimentaire. Cet écrit présente la structure des pectines ainsi que les différents modes de production des POS en insistant particulièrement sur les différentes enzymes microbiennes permettant de les obtenir et sur les applications possibles de ces POS. [less ▲]

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See detailPrincipaux modèles utilisés en régression logistique
Gillet, Adeline; Brostaux, Yves ULg; Palm, Rodolphe ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(3), 425-433

Regression is a commonly used technique for describing the relationship between a response variable and one or more explanatory variables. When the response variable is a categorical variable, usual ... [more ▼]

Regression is a commonly used technique for describing the relationship between a response variable and one or more explanatory variables. When the response variable is a categorical variable, usual regression based on ordinary least squares should be replaced by logistic regression. Binary logistic regression should be used to perform a regression on a dichotomous response. Nominal polytomous logistic regression applies to a categorical response variable that has more than two levels with a natural ordering. And ordinal polytomous logistic regression is used when the response is a categorical variable that has more than two levels with a natural ordering. This note gives an overview of these logistic regression methods and describes three models commonly used when performing ordinal logistic regression. These models are illustrated by an example related to oak decline in the Walloon Region (Belgium). [less ▲]

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See detailCell wall polysaccharides hydrolysis of malting barley (Hordeum vulgare L.) : a review
Jamar, Catherine ULg; du Jardin, Patrick ULg; Fauconnier, Marie-Laure ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 301-313

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See detailCiterne d’eau de pluie et effet sur le débit à l’exutoire du bassin versant de l’Orneau dans la région de Gembloux (Belgique
Xanthoulis, Dimitri ULg; Debauche, Olivier ULg; Fonder, Nathalie et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 239-249

This study participates to the quantitative balance of rain water domestic use. It aims towards an optimal design of rain barrels volume, the feasibility of soil infiltration techniques with excess of ... [more ▼]

This study participates to the quantitative balance of rain water domestic use. It aims towards an optimal design of rain barrels volume, the feasibility of soil infiltration techniques with excess of water and the impact assessment of rain barrel on the decrease of peak flow in a pilot rural watershed of 9 km², considering the chronology of precipitation events. The parameters that are considered are the roofs area, the number of inhabitants in the house, the average daily rainfall water consumption, and the local pluviometry. In order to design the infiltration structure associated with the rain barrel, the volume of rainfall excess from the rain barrel needs to be evaluated. Afterwards, the infiltration structure may be dimensioned according to the soil infiltration characteristics. We assume that 75 litres, out of the 115 litres daily consumed by each inhabitant, are coming from the rain barrel and the remainder (40 litres) is drawn from the drinking water distribution network. Calculations are carried out for roofs of 100, 135, 170 and 200 m², for a consumption of water ranging between 150 and 1150 L.day-1.house-1 and for rain barrels of 5, 10 and 20 m³. It appears that if correctly designed private rain barrel allow an opportune water use in households, the effect on flood reduction is, however, limited considering the relative low importance of the collecting surface (1.3% of the watershed surface). [less ▲]

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See detailStructure de l’amidon de maïs et principaux phénomènes impliqués dans sa modification thermique
Malumba Kamba, Paul ULg; Janas, Sébastien ULg; Deroanne, Claude et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 315-326

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See detailRevue bibliographique : la prise en compte des transferts horizontaux dans les modèles hydrologiques
Beckers, Eléonore ULg; Degre, Aurore ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 143-151

This bibliographical review sums up the different schemes in hydrological modelling. Moreover, it underlines how the interflows are taken into account and draws the first lines to improve their physically ... [more ▼]

This bibliographical review sums up the different schemes in hydrological modelling. Moreover, it underlines how the interflows are taken into account and draws the first lines to improve their physically based representation. In the mood of the change in agricultural practices, especially concerning the conventional tillage reduction in support of conservational tillage, it seems to be necessary to propose a better description of decisive parameters like horizontal hydraulic conductivity. More precisely, the dependence of this parameter with the water retention curve has to be described in order to represent fluxes at the plot scale and at the watershed scale. Under these circumstances, an approach with in situ measurements and physically based modelling is suggested. [less ▲]

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See detailEssai de cartographie des classes d'infiltrabilité des sols de Wallonie
Demarcin, Pierre ULg; Sohier, Catherine ULg; Mokadem, Abdel Ilah et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 119-128

On the basis of the digital soil map of Wallonia (1/20000), a decision tree is proposed for attributing infiltration class to each soil type. The proposition takes into account soil texture, drainage ... [more ▼]

On the basis of the digital soil map of Wallonia (1/20000), a decision tree is proposed for attributing infiltration class to each soil type. The proposition takes into account soil texture, drainage characteristics, substratum and, when appropriate, percentage of stoniness. The so defined infiltration classes are coherent with SCS methodology for abstraction computation (continuous or event based modelling). There are four groups named A, B, C and D from higher to lower basic infiltration rate. The map produced is a raster with a ground resolution of 10 meters, covering Wallonia (16900 km²), readily usable in hydrological distributed models. The paper deals with the classification and its inherent limitations. [less ▲]

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See detailTechniques de séchage des starters lactiques et mécanismes affectant la viabilité cellulaire suite à la lyophilisation
Coulibaly, Ibourahema ULg; Dubois Dauphin, Robin ULg; Danthine, Sabine ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(2), 287-299

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See detailLarge carrion beetles (Coleoptera, Silphidae) in Western Europe: a review
Dekeirsschieter, Jessica ULg; Verheggen, François ULg; Lognay, Georges ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(3), 425-437

This review focuses on carrion beetles (Coleoptera, Silphidae) of the Western Palearctic and their potential use in forensic entomology as bioindicators. Few studies have looked at Silphidae in forensic ... [more ▼]

This review focuses on carrion beetles (Coleoptera, Silphidae) of the Western Palearctic and their potential use in forensic entomology as bioindicators. Few studies have looked at Silphidae in forensic context and investigations. However, some Silphidae present the desirable characteristics of some Diptera used in postmortem estimates and thus may extend the minimum postmortem interval (PMImin). We review here the taxonomy and distribution of Western Palearctic Silphidae. The anatomical and morphological characteristics of both subfamilies are described for adults and larvae. The biology and ecology of silphids are also summarized for Silphinae and Nicrophorinae. A specific chapter gives an overview of the current uses of Silphidae in forensic entomology as postmortem indicator. [less ▲]

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See detailL’hydrologie, une partenaire de la géomorphopédologie pour une gestion transéchelle des grands enjeux environnementaux
Degre, Aurore ULg; Sohier, Catherine ULg; Colard, François ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), S2(15), 699-707

Unsaturated soil and subsoil are often called “critical zone” considering their major interfacing role in our environment. Dealing with solute transfer or water and soil conservation, hydrologic research ... [more ▼]

Unsaturated soil and subsoil are often called “critical zone” considering their major interfacing role in our environment. Dealing with solute transfer or water and soil conservation, hydrologic research relies on pedologic descriptions. It is the case from micro to macro scale analysis. Hydrodynamic parameters are derived from pedologic information on soil. They allow hydrologists to quantify and spatially describe the dynamic exchanges between water, soil, crops and atmosphere. The modelling of water and solute transfer through soil and vadose zone also needs them. The paper presents some research highlights on soil behaviour, hydrological modelling and forecasting under climate change. Erosion is another major topic. Soil is a poorly renewable resource. Soil conservation and soft hydraulic management in watersheds deserve more attention. They can help limiting nutrient and sediment transfer to surface water. Again, pedologic information is the starting point of conceptualization and modelling. Furthermore, the Soil Map of Belgium includes information on geomorphology and landscape descriptions which date from decades. They are of first importance to calibrate and validate detachment, transport and sedimentation models. In the current context of high environmental concern, it is demonstrated how hydrology and pedology have to be partners in order to deal with such major issues. [less ▲]

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See detailEnjeux fonciers, exploitation des ressources naturelles et Forêts des Communautés Locales en périphérie de Kinshasa, RDC
Vermeulen, Cédric ULg; Dubiez, Emilien; Procès, Pierre et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(4), 535-544

Peri-urban forests are under strong anthropic pressure. Any activity needs a previous identification of stakeholders, landscape perception, socio-economic trends in local communities and their ... [more ▼]

Peri-urban forests are under strong anthropic pressure. Any activity needs a previous identification of stakeholders, landscape perception, socio-economic trends in local communities and their relationships with land and natural resources. Kinshasa (capital of Democratic Republic of Congo, DRC) is a 10 millions inhabitants city with rapid growth and increasing impacts on surrounding villages linked with forest natural resources. This paper describes the relationship amongst local communities stakeholders and their relations with land areas and wood resources. Two areas surrounding Kinshasa (Bas-Congo and Bateke Plateaux) are considered as major fuel-wood and charcoal supply zones for the city. Those two areas are different in terms of land pressure (very high in Bas-Congo and focused on riparian forests on Bateke Plateaux), but show the same pattern of overuse of the forest and woody natural resources. In both areas, local management of forest resources by the traditional authorities (heads of village or lineage) has failed. Local population willingness for reforestation and forest restoration activities is much more important in Bas-Congo than on Bateke Plateaux. In both areas, shifting cultivation due to slash and burn practices for agricultural and charcoal practices are more and more quick. This has strong negative impact on the potential of regeneration process with local forest species. Sustainability of forest natural resources management by communities is discussed in regard to the on going negotiations on community based forest management regulations. [less ▲]

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See detailProduction potentielle de bioéthanol, de biométhane et de pellets à partir des déchets de biomasse lignocellulosique du bananier (Musa spp.) au Cameroun
Kamdem, Irenée ULg; Tomekpe, Kodjo; Thonart, Philippe ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(3), 471-483

Like most African countries who are producers and exporters of banana, Cameroon is facing a major energy deficit. Yet, the country is generating annually about 4,500,000 tons of fresh banana plant ... [more ▼]

Like most African countries who are producers and exporters of banana, Cameroon is facing a major energy deficit. Yet, the country is generating annually about 4,500,000 tons of fresh banana plant lignocellulosic waste biomass matter equivalent to 402,750 tons of dry matter. The dry matter contained about 80,57% organic matter which are not exploited. Under the sustainable development, which is linked to environmental protection, the biotransformation of these residues can potentially produce about 93,800; 92,133; 447,500 tons of bioethanol, biomethane and pellets respectively. The waste transformation could reduce the energy deficit and create jobs opportunities. Productions of this renewable energy or biofuel also constitute a new area which could assure an important source of income for the banana cultivators and the entire country. [less ▲]

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See detailMéthodologie de constitution d'une collection d'échantillons de sols en relation avec les principaux matériaux parentaux en Wallonie (Belgique méridionale)
Legrain, Xavier ULg; Renneson, Malorie ULg; Genot, Valérie ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(S2), 683-697

Over the past few years, there has been growing concern about soils and their properties, thanks to greater environmental awareness. Consequently, existing documents on soil are valuable in risk ... [more ▼]

Over the past few years, there has been growing concern about soils and their properties, thanks to greater environmental awareness. Consequently, existing documents on soil are valuable in risk assessment and for the research of well-adapted solutions. In this context, this paper reviews the main stages of soil mapping in Belgium and presents current works to valorize the Digital Soil Map of Wallonia and update associated databases. Belgium is among the first countries to be completely covered by a detailed soil map (1:20,000). The origin of the Soil Map of Belgium, its realisation between 1947 and 1991, the principles and characteristics as well as the related products are described. But since its publication, due to the increasing need of soil information and thanks to the development of geographical information systems the Walloon part of the map was digitalised between 2000 and 2003 by the Digital Soil Map of Wallonia (DSMW) Project. From this early action at regional level, a selection of immediately derived products is presented and briefly commented. However, if these products go beyond the initial objective of agricultural production increase, they do not always meet the environmental challenges nor the future legislation at European, national and regional levels. To fill this gap, the recent tasks carried out by the DMSW team are presented through a description of their methodological and technical framework. The long-term objective is to build Regional Soil Information Systems based on the use of the Digital Soil Map of Wallonia as a tool of integration, structuring and referencing of pedological information. [less ▲]

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See detailUse of induced mutations in embryogenesis study in bean Phaseolus vulgaris L. and two model plants Arabidopsis thaliana (L.) Heynh. and Zea mays L.
Silue, Souleymane ULg; Jacquemin, Jean-Marie; Baudoin, Jean-Pierre ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 195-205

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See detailMéthode pragmatique d’évaluation de la réserve en eau des stations forestières et cartographie à l’échelle régionale (Wallonie, Belgique)
Ridremont, François ULg; Lejeune, Philippe ULg; Claessens, Hugues ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(S2), 727-741

The assessment of the forest sites water availability constitutes a growing concern following the awareness of the potential impact of climate change on the soil moisture regime. At the present time, the ... [more ▼]

The assessment of the forest sites water availability constitutes a growing concern following the awareness of the potential impact of climate change on the soil moisture regime. At the present time, the forest managers lack tools for a quantitative estimation of the soil water reserve. This paper presents a simple estimation method that can be adopted on field by foresters. A map of this soil water reserve at the forest site scale has been established for the Southern Belgium. After the inventory of the possible techniques, the “textural method”, based on the pedotransfert classes of Jamagne et al. (1977), has been used. The soil profiles from the Aardewerk database have eased the translation of the Jamagne et al. (1977)’s results in the Belgian textural system. Moreover, the geodatabase of the Digital Soil Map of Wallonia (DSMW), through the typology of the major soil types, has been used as mapping support of the water reserve at the regional scale. Like a first attempt of validation, the result has been compared with the bioindicator character of forest understory vegetation. The regression results show a significant relationship between the soil water reserve and the vegetation estimate, but they also indicate that the water reserve does not explain alone the moisture level expressed by the flora. It emerges that the characterization of the Walloon parent materials will constitute an undeniable support for the development of the proposed method, the transposition of foreign results leading to some bias. The use prospects of this thematic map are multiple: integration as inputs for the autecological modelling, assessment of the moisture regime for the water availability of forest sites and building of sites catalogs; as many tools to guide forest managers in their planning measures. [less ▲]

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See detailUtilisation des mutations induites pour l'étude de l'embryogenèse chez le haricot Phaseolus vulgaris L. et deux plantes modèles, Arabidopsis thaliana (L.) Heynh. et Zea mays L.
Silué, Souleymane; Jacquemin, Jean-Marie; Baudoin, Jean-Pierre ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2011), 15(1), 195-205

L'amélioration du haricot commun Phaseolus vulgaris L. par hybridations interspécifiques avec les espèces Phaseolus coccineus L. et Phaseolus polyanthus Greenm. utilisées comme parents femelles se solde ... [more ▼]

L'amélioration du haricot commun Phaseolus vulgaris L. par hybridations interspécifiques avec les espèces Phaseolus coccineus L. et Phaseolus polyanthus Greenm. utilisées comme parents femelles se solde généralement par l'avortement des embryons hybrides. L'identification des gènes intervenant dans le développement normal des embryons permettrait d'expliquer en partie l'avortement des embryons hybrides ; les mutations induites pourraient donc être une alternative chez Phaseolus pour identifier les gènes clés de l'embryogenèse. cette étude présente quelques exemples d'utilisation des mutations induites dans l'identification des gènes indispensables au bon déroulement de l'embryogenèse chez Arabidopsis thaliana (L.) Heyhn. et Zea mays L., plantes modèles de l'étude de l'embryogenèse chez les dicotylédones et les monocotylédones, respectivement. Chez ces deux espèces, des mutants du développement embryonnaire ont été identifiés en utilisant la mutagenèse insertionnelle et la mutagenèse chimique à l'Ethyl Méthane Sulfonate (EMS). Chez Arabidopsis, les mutants sont affectés dans la polarité apico-basale, l'organisation radiale et les étapes post-embryonnaires et certains embryons mutants sont affectés dans la signalisation de l'auxine. Chez le maïs, les mutants defective kernel (dek), altérés au niveau de l'embryon et de l'albumen, et les mutants emb pour lequels seul l'embryon est affecté, ont été identifiés. Chez le haricot commun, des plantes déficientes dans la formation des graines ont été identifiées suite à la mutagenèse à l'EMS. Les embryons des graines de ces plantes arrêtent de croître à différents stades de développement et présentent des anomalies principalement au niveau du suspenseur et des cotylédons. [less ▲]

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