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See detailContribution à l'étude des techniques de mélange retardé des produits phytosanitaires sur les pulvérisateurs agricoles.
Huygebaert, Bruno; Mostade, Olivier; Oestges, O. et al

in Med. Fac. Landbouww. Univ. Gent (1993), 58(2a), 257-264

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See detailContribution à l'étude des urines pathologiques
Fredericq, Léon ULg

in Bulletin de l'Académie Royale de Médecine de Belgique (1882)

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See detailContribution à l'étude du climat de trois cavités souterraines belges
Piron, Julie; Erpicum, Michel ULg; Ek, Camille ULg et al

in Bulletin de la Société Royale Belge d'Etudes Géologiques et Archéologiques (2007), XLVI

Some temperature and CO2 measures have been made for one year in the cave of Ramioul and in the cave of Comblain-au-Pont, and for six months in the underground quarry of Petit-Lanaye inférieure ... [more ▼]

Some temperature and CO2 measures have been made for one year in the cave of Ramioul and in the cave of Comblain-au-Pont, and for six months in the underground quarry of Petit-Lanaye inférieure. Temperature has been measured by dataloggers. These measures and the comparison between the different caves contributed to a better understanding of their climates. In the cave of Ramioul, closed by non insulated doors, the air movements are relatively low but there are some heat exchanges between the outside and inside air by conduction through the doors. The cave can be divided into two parts each with a different climatic behaviour. High and dangerous CO2 rates have already been measured in this cave. Rates fluctuate in an irregular way and without any connection with the natural seasonal cycle, and the CO2 origins stay uncertain. The cave of Comblain-au-Pont can be divided into two major parts: one enclosed and the other ventilated. The ventilated region is a “wind tube” during the winter, but it doesn’t reverse in the summer. On a larger scale, this region can be considered as a cold air trap despite its two exits, since it has a descendant morphology. <br />In the underground carry of Petit-Lanaye inférieure, the low number of data doesn’t allow a complete diagnosis of the climate organisation, but can give a first idea for the summer period. We can already distinguish some parts that are more or less influenced by the outside temperature fluctuations, probably in relation with some air movements which organised <br />themselves in a complex way in the labyrinthic galleries network. [less ▲]

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See detailContribution à l'étude du comportement et des déformations d'une mâchoire
Mengoni, Marlène ULg

Master of advanced studies dissertation (2005)

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See detailContribution à l’étude du formulaire des traités d’alliance entre Rome et les cités grecques
Famerie, Etienne ULg

Scientific conference (2012, March)

La mise en série des traités d’alliance conclus entre Rome et les cités grecques permet de substantiels progrès dans l’établissement et l’interprétation des textes. Après la « clause de majesté » ... [more ▼]

La mise en série des traités d’alliance conclus entre Rome et les cités grecques permet de substantiels progrès dans l’établissement et l’interprétation des textes. Après la « clause de majesté », récemment étudiée (CCG, 20, 2011), le cas de la clause modificative retiendra l’attention. Un nouvel examen des traités avec Méthymne et Astypalaia engage notamment à revoir ce qu’on pourrait appeler la « théorie des clauses annexées ». [less ▲]

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See detailContribution à l’étude du Plasma Riche en Plaquettes (PRP) dans le traitement des lésions tendineuses
Kaux, Jean-François ULg

Doctoral thesis (2014)

Platelet-rich plasma (PRP) may represent a new therapeutic option for chronic tendinopathies. Platelets release various cytokines and growth factors which promote angiogenesis, tissue remodeling, and ... [more ▼]

Platelet-rich plasma (PRP) may represent a new therapeutic option for chronic tendinopathies. Platelets release various cytokines and growth factors which promote angiogenesis, tissue remodeling, and wound healing. We made an extended literature review of the use of PRP in chronic tendinopathies. Despite the proven efficacy of PRP on tissue regeneration in experimental studies, there is currently scanty tangible clinical evidence with respect to its efficacy in chronic tendon disorders. The few studies that have been performed appear unlikely to be comparable. Randomized controlled studies with appropriate placebo groups are needed to determine the real effectiveness of PRP for treating chronic musculoskeletal injuries. After, we made a study to compare the platelet concentrations using 5 techniques of preparation of PRP and observed that each provides a very different PRP, with variations in the platelet concentrations and of the amount (if any) of erythrocytes and leucocytes. White blood cells could adversely affect wound healing through the release of proinflammatory factors responsible for extracellular matrix degradation. In addition, erythrocyte lysis releases free radicals that harm tissue structures. We thus think that ideal PRP should not contain any erythrocytes or leucocytes, and that the quality of the PRP could perhaps partially explain the variable results observed in the literature. The aim of our next study was to determine if an injection of PRP could improve the healing of sectioned Achilles tendons of rats. After surgery, rats received an injection of PRP (n = 60) or a physiological solution (n = 60) in situ. After 5, 15, and 30 days, 20 rats of both groups were euthanized and 15 collected tendons were submitted to a biomechanical test using cryo-jaws before performing transcriptomic analyses. Histological and biochemical analyses were performed on the five remaining tendons in each group. Tendons in the PRP group were more resistant to rupture at 15 and 30 days. The mechanical stress was significantly increased in tendons of the PRP group at day 30. Histological analysis showed a precocious deposition of fibrillar collagen at day 5 confirmed by a biochemical measurement. The expression of tenomodulin was significantly higher at day 5. The messenger RNA levels of type III collagen, matrix metalloproteinases 2, 3, and 9, were similar in the two groups at all time points, whereas type I collagen was significantly increased at day 30 in the PRP group. We concluded that an injection of PRP in sectioned rat Achilles tendon influences the early phase of tendon healing and results in an ultimately stronger mechanical resistance. Vascular endothelial growth factor (VEGF) is a platelet growth factor known to regulate angiogenesis. VEGF-111, a biologically active and proteolysis-resistant splice variant of this family, was recently identified. We made a study with the aim of evaluating whether VEGF-111 could have a therapeutic interest in tendon pathologies with the same rat protocol as our previous study. The force necessary to induce tendon rupture was greater for tendons of the VEGF-111 group (but less than the results obtained with the PRP in our previous study), while the section areas of the tendons were similar. The mechanical stress was similar at 5 and 15 days in both groups but was improved for the VEGF-111 group at day 30. No differences were observed in the mRNA expression of collagen III, tenomodulin and MMP-9. Finally, we made a study, the aim of which was to evaluate the clinical status and the return to sports activities in patients with chronic upper patellar tendinopathies, up to one year after a single infiltration of PRP. Twenty patients with chronic upper patellar tendinopathy were enrolled. Assessments were made before infiltration of PRP, and 6 weeks, 3 months and 1 year after the infiltration, using a 10-point Visual Analogic Scale, clinical examinations with a pressure algometer, algofunctional scores (IKDC and VISA-P), functional assessments (isokinetic and optojump evaluations) and imagery (ultrasounds and MRI). The PRP was obtained with an apheresis system (COM.TEC, Fresenius). Six millilitres of PRP were injected without local anaesthetic. One week after infiltration, patients started a standardised sub-maximal eccentric reeducation. We observed that with time, during the 1-year follow-up, VAS dropped significantly and both IKDC and VISA-P scores improved also significantly. During functional evaluation, it decreased as well, but without significant functional improvement. No improvements in the imagery measurements were observed. Younger patients seemed to be more susceptible to have a relief of pain by the PRP infiltration. Seventy percent of the patients reported a favourable evolution with decrease of pain, 15% reported no improvement and 15% were treated surgically. Seventy percent returned to sports activities, 64,3% without any pain and 50% recovered the same sports level. Even if 1 infiltration seems to be efficient in the indication of patellar tendinopathies, most studies evaluated the effects of 3 successive infiltrations. However, the multiplication of infiltrations risks increasing complications, and this treatment can be expensive. It seemed relevant to evaluate if 2 infiltrations of PRP would be more effective than only 1.Twenty patients suffering from jumper’s knee for more than 3 months were enrolled and randomized in 2 groups (1 or 2 infiltrations of PRP). The follow-up was made as follows: VAS, IKDC and VISA-P scores, algometer, isokinetic and ultrasounds evaluations. The concentration of the PRP used for each infiltration was similar in both groups, without any red or white blood cells. Results for all the evaluations did not show any difference between the groups. The comparison of 1 or 2 infiltrations of PRP did not show any difference between the 2 groups after a follow-up of 3 months. A second close infiltration of PRP to treat upper patellar tendinopathies is not necessary to improve the efficacy of this treatment in the short term. However, these results must be evaluated at a longer term. [less ▲]

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See detailContribution à l’étude du rayonnement solaire à la station météorologique du Mont Rigi. Transparence de l’atmosphère et albédo
Dury, Marie ULg

Master's dissertation (2006)

Notre mémoire s’est centré sur le rayonnement solaire au Mont Rigi à partir de la grande quantité de paramètres météorologiques engrangés par la nouvelle station météorologique automatique de l’I.R.M ... [more ▼]

Notre mémoire s’est centré sur le rayonnement solaire au Mont Rigi à partir de la grande quantité de paramètres météorologiques engrangés par la nouvelle station météorologique automatique de l’I.R.M. (2001). Jusqu’à ce jour, aucune étude systématique n’avait encore été consacrée à ce beau sujet. Dans la première partie, nous présentons la station et les appareils de mesure en étant surtout soucieuse d’évoquer et d’illustrer les perturbations dont peuvent souffrir les mesures suite aux conditions météorologiques parfois rudes dans les Hautes-Fagnes telles qu’on n’en rencontre pas dans les autres stations automatiques du pays et qui ne sont pas toujours compatibles avec des enregistrements automatiques. La deuxième partie, point central de notre travail, porte sur l’étude de la transparence de l’atmosphère au Mont Rigi avec pour objectif de mettre en évidence les particularités de la composition de l’air de la région et de quantifier son influence sur le rayonnement solaire. Nous avons utilisé les paramètres à notre disposition: la hauteur du soleil, la teneur en vapeur d’eau de l’air (caractérisée par la hauteur d’eau condensable) et la couverture nuageuse. La troisième partie s’intéresse à la variation de l’albédo de la surface sous le pyranomètre, caractérisée par une végétation herbacée et hétérogène, composée d’espèces courantes dans les Hautes-Fagnes (épilobes en épis, myrtille, callune,…). Cette question n'a pas constitué le point central de notre recherche mais étant donné que nous possédions deux ans et demi de mesures en continu d’albédo, il était intéressant d’apporter de nouvelles observations à l’étude de ce paramètre. [less ▲]

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See detailContribution à l'étude du régime alimentaire de la chouette chevêche (Athena noctua) en Belgique
Libois, Roland ULg

in Aves (1977), 14

The recognition of 1,782 preys from 9 little owl's (Athena noctua) pellet samples shows us that: i: the importance of the vertebrates in the owl's diet varies sharp from one season to the other (mean ... [more ▼]

The recognition of 1,782 preys from 9 little owl's (Athena noctua) pellet samples shows us that: i: the importance of the vertebrates in the owl's diet varies sharp from one season to the other (mean value: 11.1 %); ii:voles of the genus Microtus account for 4/5 of the owl's vertebrate preys; iii: the more abundant insects in the owl's diet are weevils (19%), cantharis (19 %), ground beetles (12%), earwigs (11%), beetles and may beetles (17%); iv: the little owl principally hunts by foot as his major prey items live on the ground or at a very low level in the grasses. Moreover, the analysis of 4 stomach contents (127 preys) suggests that the preys without any resistant anatomic feature (such as caterpillars or earthworms) probably disappears and thus let appear no identifiable remain in the pellets, when they easily can be found in the stomachs. [less ▲]

Detailed reference viewed: 74 (2 ULg)