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 detailMicrobial ecology of the closed artificial ecosystem MELiSSA (Micro-Ecological Life Support System Alternative): Reinventing and compartmentalizing the Earth's food and oxygen regeneration system for long-haul space exploration missions
Hendrickx, Larissa; De Wever, Heleen; Hermans, Veronik et al

in Research in Microbiology (2006), 157

MELiSSA is a bioregenerative life support system designed by the European Space Agency (ESA) for the complete recycling of gas, liquid and solid wastes during long distance space exploration. The system ... [more ▼]

MELiSSA is a bioregenerative life support system designed by the European Space Agency (ESA) for the complete recycling of gas, liquid and solid wastes during long distance space exploration. The system uses the combined activity of different living organisms: microbial cultures in bioreactors, a plant compartment and a human crew. In this minireview, the development of a short-cut ecological system for the biotransformation of organic waste is discussed from a microorganism's perspective. The artificial ecological model—still in full development—that is inspired by Earth's own geomicrobiological ecosystem serves as an ideal study object on microbial ecology and will become an indispensable travel companion in manned space exploration. [less ▲]

Detailed reference viewed: 83 (15 ULg)
Full Text
Peer Reviewed
See detailMicrobial heterogeneity affects bioprocess robustness: Dynamic single cell analysis contribute to understanding microbial populations
Delvigne, Frank ULg; Goffin, Philippe

in Biotechnology Journal (2014), 9(1), 61-72

Heterogeneity or segregation of microbial populations has been the subject of much research, but the real impact of this phenomenon on bioprocesses remains not well understood. The main reason behind this ... [more ▼]

Heterogeneity or segregation of microbial populations has been the subject of much research, but the real impact of this phenomenon on bioprocesses remains not well understood. The main reason behind this lack of knowledge is the difficulty for monitoring microbial population heterogeneity in dynamic process conditions. The main concepts leading to microbial population heterogeneity in the context of bioprocesses have been summarized by two distinct hypotheses. The first one involves the individual history of microbial cells or “path” followed during their residence time inside process equipment. The second one involves a coordinated response of the microbial population as a bet-hedging strategy in order to cope with process-related stresses. The respective contribution of each hypothesis to microbial heterogeneity in bioprocesses is still unclear. This statement illustrates the fact that, although microbial phenotypic heterogeneity has been thoroughly investigated at the fundamental level, the implications of this phenomenon in the context of microbial bioprocesses are still subjected to debate. At this time, automated flow cytometry is the best technique for the investigation of microbial heterogeneity in process conditions. However, dedicated software and relevant biomarkers are needed for its proper integration as a bioprocess control tool. [less ▲]

Detailed reference viewed: 56 (5 ULg)
Full Text
Peer Reviewed
See detailMicrobial inoculation for improving the growth and health of micropropagated strawberry
Vestberg, Mauritz; Kukkonen, Sanna; Saari, K. et al

in Applied Soil Ecology (2004), 27(3), 243-258

Multimicrobial inoculation has been proposed as a way of protecting plants against environmental stress and increasing the sustainability of plant production. To study these possibilities in a ... [more ▼]

Multimicrobial inoculation has been proposed as a way of protecting plants against environmental stress and increasing the sustainability of plant production. To study these possibilities in a micropropagation system, microplants of strawberry, Fragaria x ananssa, were inoculated or left uninoculated with five microorganisms (Glomus mosseae BEG29, Bacillus subtilis M3, Trichoderma harzianum DB11, Pseudomonas fluorescens C7rl2 and Gliocladium catenulatum Gliomix(R)), used either singly or in dual mixtures in the presence or absence of the strawberry diseases crown rot (Phytophthora cactorum) and red stele (P. fragariae). Finnish light Sphagnum peat was used as the growth substrate in the experiments. Seven experiments were performed as two to three months pot experiments in greenhouses of research laboratories in Finland and Belgium and in a nursery in Finland. In most experiments, the inoculated microorganims were detected at sufficient densities four weeks after inoculation. Exceptions were T harzianum and G. mosseae which were detected at insufficient densities in several experiments. This might have been due to the biological and/or nutritional properties of the peat. None of the microorganisms or their mixtures caused significant growth-promoting effects in more than two experiments. Dual inoculation did not increase growth more than inoculation with single organisms. B. subtilis was the most promising growth promoting microorganism. Most of the microbial treatments decreased crown rot shoot symptoms as well as the numbers of oospores in the roots when the experiment was performed in autumn. In the summer experiment with conditions more favourable for strawberry growth, no disease control was obtained, but some of the microorganisms increased the severity of crown rot. No microbial treatment decreased shoot symptoms of red stele, but the degree of root necrosis was slightly decreased by B. subtilis and G. mosseae + G. catenulatum. The numbers of oospores of P. fragariae in strawberry roots were not decreased by any treatment, but several treatments increased them. Both growth promotion and disease control considered, the single microorganisms T harzianum, G. catenulatum and B. subtilis as well as the mixture T harzianum + G. catenulatum were the most promising treatments in this study. However, the great variation between experiments indicates that more studies are needed for optimization of the whole plant-substrate-microorganism system. The importance of microbial inoculation for ensuring subsequent growth in the field also needs to be studied. (C) 2004 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 86 (8 ULg)
Peer Reviewed
See detailMicrobial Processes for the Heavy Metal Recovery
Crine, Michel ULg; Hecq, W.

in Actes du Congrès organisé par l'Association Universitaire pour l'Environnement et le Groupe de contact FNRS "Génie chimique" (1990, April 12)

Detailed reference viewed: 6 (1 ULg)
Full Text
Peer Reviewed
See detailMicrobial volatile organic compounds as indicators of fungi. Can an electronic nose detect fungi in indoor environments?
Kuske, Martyna; Romain, Anne-Claude ULg; Nicolas, Jacques ULg

in Building and Environment (2005), 40(6), 824-831

The paper presents a review of several studies on the detection of microbial volatile organic compounds (MVOCs) considered as indicators of fungal contamination. As fungi produce specific profiles, or ... [more ▼]

The paper presents a review of several studies on the detection of microbial volatile organic compounds (MVOCs) considered as indicators of fungal contamination. As fungi produce specific profiles, or fingerprints of volatile compounds, the electronic nose technology is a very promising opportunity for rapid and non costly detection of fungi in buildings. E-noses are able to distinguish between mouldy and non-mouldy samples, and also to recognise certain species of fungi. However, two limiting factors may appear decisive for employment of electronic noses in indoor fungi detection: low concentrations of MVOCs and presence of interfering substances in indoor environments. [less ▲]

Detailed reference viewed: 109 (54 ULg)
Full Text
Peer Reviewed
See detailMicrobial, biochemical and sensorial quality assessment of Algerian farmed tilapia (Oreochromis niloticus) stored at 4 and 30°C
Dergal, Nadir; Abi-Ayad, S.M.E.-A.; Degand, Guy ULg et al

in African Journal of Food Science (2013), 7(12), 498-507

Detailed reference viewed: 47 (15 ULg)
Full Text
See detailMicrobiological Analyses of Raw Milk Cheeses from Walloon Farms
Sanchez-Alcaraz, Maria-Thérésa ULg; Godrie, Thérèse ULg; Helleputte, Murielle ULg et al

Poster (2010, September 16)

For several years now, the Walloon Region has been supporting a project to help and follow farmers through their diversification activities: la Cellule Qualité Produits Fermiers (CQPF). Among their ... [more ▼]

For several years now, the Walloon Region has been supporting a project to help and follow farmers through their diversification activities: la Cellule Qualité Produits Fermiers (CQPF). Among their partners, the Process and Quality Engineering Laboratory in the Department of Food Technology of the Agricultural University of Gembloux is in charge of the hygienic supervision, ensuring the implementation of self-evaluation systems based on the HACCP principles and good hygiene practice guidelines. For four years, the CQPF has been following almost a hundred Walloon cheesemaking artisans using raw milk from cow, goat and ewe. According to the Commission Regulation (EC) No 2073/2005 on microbiological criteria for foodstuffs, analyses of microbiological pathogens have to be performed regularly to guarantee healthy and hazard free raw milk products. The results of microbiological analyses from raw milk cheeses of our artisans between January 2007 and June 2010 are presented below. We were interested on showing firstly, if the quality of the Walloon cheeses follow the standards of food safety criteria established by the European regulation, and secondly, if there is a trend for pathogen contamination throughout the year. [less ▲]

Detailed reference viewed: 64 (12 ULg)
See detailMicrobiological and chemical characterisation of St Anne cave, Belgium
Carnol, Monique ULg; Malchair, Sandrine ULg

Poster (2011, September)

In Belgium, most drinking water is provided by calcareous karst aquifers. Chemical and microbiological characterisation of these systems focalises mainly on the transfer of pollutants and microbial ... [more ▼]

In Belgium, most drinking water is provided by calcareous karst aquifers. Chemical and microbiological characterisation of these systems focalises mainly on the transfer of pollutants and microbial contaminants, major sources of sanitary risks. These studies are generally based on bacterial cultures, representing however only 1% of bacterial species present in the environment. Molecular techniques allow the study of the global microbial diversity of an environment, as they are based on direct ADN extractions, without previous culturing steps. The objective of this research was the study of the microbial diversity in the ‘St Anne’ cave, Belgium. Chemical composition of the water, cultivable bacteria and the diversity of ammonia-oxydizing bacteria (AOB) were studied in waters and sediments of the ‘Chawresse’ (underground river in St Anne), on the cave’s wall and in soils aboveground. Bacterial counts revealed that most cultivable bacteria were associated with suspended particles and that their numbers decreased underground. Molecular analyses revealed the presence of AOB in the karst system. AOB are responsible for the first, acidifying step of the nitrification process. Further studies will specify and quantify their activity in this karst system. [less ▲]

Detailed reference viewed: 96 (17 ULg)
See detailMicrobiological and chemical study of « Tiéré », senegalese millet fermented food.
Leite, N.; Diop, M.; Tine, E. et al

Poster (1999, July)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailMicrobiological and ecological responses to global environmental changes in polar regions (MERGE): An IPY core coordinating project
Naganuma, Takeshi; Wilmotte, Annick ULg

in Polar Sciences (2009), 3

An integrated program, ‘‘Microbiological and ecological responses to global environmental changes in polar regions’’ (MERGE), was proposed in the International Polar Year (IPY) 2007e2008 and endorsed by ... [more ▼]

An integrated program, ‘‘Microbiological and ecological responses to global environmental changes in polar regions’’ (MERGE), was proposed in the International Polar Year (IPY) 2007e2008 and endorsed by the IPY committee as a coordinating proposal. MERGE hosts original proposals to the IPYand facilitates their funding. MERGE selected three key questions to produce scientific achievements. Prokaryotic and eukaryotic organisms in terrestrial, lacustrine, and supraglacial habitats were targeted according to diversity and biogeography; food webs and ecosystem evolution; and linkages between biological, chemical, and physical processes in the supraglacial biome. [less ▲]

Detailed reference viewed: 46 (3 ULg)
Full Text
Peer Reviewed
See detailMicrobiological and physico-chemical characteristic of Rwandese traditional beer «Ikigage»
Lyumugabe, F.; Kamaliza, C.; Bajyana, E. et al

in African Journal of Biotechnology (2010), 9(27), 4241-4246

Detailed reference viewed: 24 (9 ULg)
Full Text
Peer Reviewed
See detailMicrobiological and Physico-Chemical Quality of Smoked Shrimp, An Expanding Food Condiment in Beninese Local Markets
Kpoclou, Euloge Y.; Anihouvi, Victor B.; Azokpota, Paulin et al

in Food and Public Health (2013), 3(6), 277-283

Entire Smoked Shrimp (ESS) and Smoked Shrimp Powder (SSP) are two food condiments widely used in Beninese local cooking practices. Twelve samples of each product collected from local markets were ... [more ▼]

Entire Smoked Shrimp (ESS) and Smoked Shrimp Powder (SSP) are two food condiments widely used in Beninese local cooking practices. Twelve samples of each product collected from local markets were evaluated for safety assessment using standard methods. Regarding the microbiological status of the samples, the Enterobacteriaceae were detected in 83% and 75% of ESS and SSP respectively, whereas 25% of samples of each product were found to contain E. coli. Pathogenic bacteria such as S. aureus and Salmonella were absent. Except 8% and 17% of SSP sample exceeding the maximal limit of 106 UFC/g for Aerobic Mesophilic Bacteria and 104 UFC/g Enterobacteriaceae respectively, all the other samples were within the acceptable limits. Water activity values were low, ranging between 0.54±0.01 for SSP and 0.61±0.01 for ESS, showing a potential microbial stability. Considering the chemical hazards, 15 EU priority polycyclic aromatic hydrocarbon (PAHs) were detected in the samples examined with median Benzo(a) pyrene and PAH4 contents (91 μg kg-1 and 490 μg kg-1respectively) exceeding the European maximal limit (5.0 μg kg-1 and 30 μg kg-1). This study showed that smoked shrimps may be generally safe from a microbiological point of view, but they constitute a large source of exposure to possible carcinogenic PAHs. [less ▲]

Detailed reference viewed: 39 (8 ULg)
Full Text
Peer Reviewed
See detailMicrobiological and physicochemical characteristics of Rwandese traditional beer "ikigage"
Lyumugabe Loshima, François ULg

in African Journal of Biotechnology (2010), 9(27),

Samples of traditional sorghum beer Ikigage was collected in the southern province of Rwanda and analyzed for microbiological and physico-chemical contents. Ikigage contained total aerobic mesophilic ... [more ▼]

Samples of traditional sorghum beer Ikigage was collected in the southern province of Rwanda and analyzed for microbiological and physico-chemical contents. Ikigage contained total aerobic mesophilic bacteria (33.55 x 106 cfu/ml), yeast (10.15 x 106 cfu/ml), lactic acid bacteria (35.35 x 104 cfu/ml), moulds (4.12 x 104 cfu/ml), E. coli (21.90 x 103 cfu/ml), fecal streptococci (22.50 x 103 cfu/ml), Staphylococcus aureus (16.02 x 103 cfu/ml), total coliform (32.30 x 103 cfu/ml), ethanol, soluble protein, reducing sugars, total acidity, pH and Brix were 2.2% (v/v), 9.2 g/l, 2.3, 1.7%, 3.9 and 11.5 bx, respectively. The yeast was identified by API 20 C test and confirmed by PCR-Sequencing of ITS-5.8S region of rDNA. Seventy yeasts isolated in the samples were found to belong to either Saccharomyces cerevisae, Candida inconspicua, Issatchenkia orientalis, Candida magnolia and Candida humilis. Lactic acid bacteria were identified using the API 50 CHL system. Ten different isolates of lactic acid bacteria belonged exclusively to the genus Lactobacillus: Lactobacillus fermentum, Lactobacillus buchneri, and Lactobacillus sp. The micro-organisms of fecal origin are from the water and the operations postfermentation process. The presence of potential pathogens emphasizes the importance of developing starter cultures with GRAS status for commercialization of ikigage. [less ▲]

Detailed reference viewed: 10 (1 ULg)
See detailMicrobiological control of apple postharvest diseases: a case of study
Jijakli, Haissam ULg; Lepoivre, Philippe ULg; Grevesse, C.

in revista corpoica (1998), 2

Detailed reference viewed: 9 (0 ULg)
Full Text
See detailMicrobiological control on the cycling of Fe and its isotopes in Antarctic sea ice
Schoemann, V.; de Jong, J.; Lannuzel, D. et al

Poster (2008, July)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailMicrobiological diagnosis of infectious keratitis
MELIN, Pierrette ULg

Conference (2013, March 16)

Detailed reference viewed: 13 (1 ULg)
Full Text
See detailMicrobiological state of the art of walloon farm raw milk butter (2006 – 2009).
Godrie, Thérèse ULg; Di Tanna, Sybille ULg; Helleputte, Murielle ULg et al

in Fourteenth conference on food microbiology (2009, June)

For several years, Walloon Region has been supporting financially a project to help farmers: la Cellule Qualité Produits Fermiers (CQPF). This project aims to accompany farmers in their diversification ... [more ▼]

For several years, Walloon Region has been supporting financially a project to help farmers: la Cellule Qualité Produits Fermiers (CQPF). This project aims to accompany farmers in their diversification activities. In this context, Agricultural University of Gembloux, Department of Food Technology and “Centre d’Expertise pour la Qualité” have ensured and are ensuring autocontrol system implementation based on the HACCP principles, together with the application of good hygiene practice. In this context, microbiological analyses on farm raw milk butter have been performed. Results collected during the period from September 2006 to April 2009 are presented below. [less ▲]

Detailed reference viewed: 35 (12 ULg)
Full Text
Peer Reviewed
See detailLa microbiologie prévisionnelle : un nouvel outil de maîtrise de la qualité microbiologique des denrées alimentaires
Delhalle, Laurent ULg; Clinquart, Antoine ULg; Daube, Georges ULg

in Food Science and Law (2010), 2

Les nouveaux outils de microbiologie prévisionnelle permettent de mieux comprendre et de maîtriser le comportement des micro-organismes dans la chaîne alimentaire. La législation européenne récente, dont ... [more ▼]

Les nouveaux outils de microbiologie prévisionnelle permettent de mieux comprendre et de maîtriser le comportement des micro-organismes dans la chaîne alimentaire. La législation européenne récente, dont le but est garantir un niveau élevé de sécurité sanitaire des aliments proposés au consommateur, mentionne cette méthodologie comme outil de référence. Les autorités en charge de la gestion de la santé publique et les industriels ont maintenant à leur disposition des outils leur permettant de comprendre les flux de contamination dans la chaîne alimentaire, de fixer une date limite de consommation, d’optimaliser les processus de transformation et de conservation, et de proposer des aliments sûrs aux consommateurs. Cette discipline offre la possibilité, à travers ses modèles et ses concepts, d’exploiter des données issues d’expérimentations réalisées au laboratoire ou en production et de les convertir en applications qui permettent d’évaluer la stabilité et la sécurité d’une denrée alimentaire. [less ▲]

Detailed reference viewed: 7 (1 ULg)