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See detailLong range seasonal movements of northern pike (Esox lucius L.) in the barbel zone of the River Ourthe (River Meuse basin, Belgium).
Ovidio, Michaël ULg

in Aquatic telemetry: advances and applications (2005)

In order to study the annual activity cycle and reproductive ecology of northern pike (Esox lucius L.) in the River Ourthe (Belgian Ardenne), 6 fish (579-742mm FL, 1605-4090g, 2 females and 4 males) were ... [more ▼]

In order to study the annual activity cycle and reproductive ecology of northern pike (Esox lucius L.) in the River Ourthe (Belgian Ardenne), 6 fish (579-742mm FL, 1605-4090g, 2 females and 4 males) were captured by electric fishing in November 2000 and January 2001. They were surgically implanted with a radio-transmitter and tracked for 149 to 349 days in a 30-km river stretch. During the pre-spawning period in winter, most movements were between distinct holding areas spaced from 40 to 550 m. All the pike began the upstream spawning migration between 8 February and 30 March 2001, when the mean water temperature varied from 6.7°C to 8.7 °C and the water flow from 52 to 199 m3s-1. The six pike travelled upstream, over distances ranging from 0.75 km to 15.7 km to reach their potential spawning sites. Pike arrived on their potential spawning sites between the 13 February and the 02 April 2001 and remained there from 5 to 25 days when the daily mean water temperature ranged from 2.9 to 10.0 °C. The six pike moved downstream after spawning and showed similar behaviour to those observed prior to spawning, but the distances between holding areas were more extended than during the winter pre-spawning period. When considering the entire tracking period, the longitudinal extension of the activity domains ranged 1 421 to 24 798 m (mean 12,050 m). This exploratory study provided original observations on northern pike movements in a barbel zone of the River Meuse basin. Results contrasted with the widely established view of pike being a sedentary predator and provides data on its behaviour throughout the annual cycle. [less ▲]

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See detailSnail diversity in small water bodies and its potential implication on the epidemiology of fasciolosis in Belgium
Caron, Yannick ULg; Lasri, Saadia; Gillardin, V. et al

Conference (2005)

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See detailPhotobiologie cutanée.
Hermanns-Lê, Trinh ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

The integration of the various cell reactions with ultraviolet light is modulated by the phototypes. It is responsible for photo-immunological processes and for photocancerogenesis.

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See detailGaia, lumière et biosphère.
Hermanns, Jean-François ULg; Hermanns-Lê, Trinh ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Some aspects of life are tightly bound to light exposure. Photosynthesis, chronobiology and various manifestations of the socio-cultural behaviour are typical examples.

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See detailLe cas clinique du mois. Mycobacteries atypiques et mésothérapie.
Henry, Frédérique ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60(1), 7-10

Cutaneous infections due to atypical mycobacteria are varied. Their prevalence appears on the rise. The contamination comes from the environment following a breaking, even minimal, of the cutaneous ... [more ▼]

Cutaneous infections due to atypical mycobacteria are varied. Their prevalence appears on the rise. The contamination comes from the environment following a breaking, even minimal, of the cutaneous barrier. Mesotherapy, particularly when performed using a mechanical device, is a well recognized iatrogenic origin of this type of microorganism inoculation [less ▲]

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See detailDu soleil a la terre.
Uhoda, Emmanuelle ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Sun emits a vast array of electromagnetic radiations. After a long but fast journey, the spectrum of visible and ultraviolet light, and infrared radiations reaches the furthermost boundaries of the Earth ... [more ▼]

Sun emits a vast array of electromagnetic radiations. After a long but fast journey, the spectrum of visible and ultraviolet light, and infrared radiations reaches the furthermost boundaries of the Earth. Only a fraction of them reaches the biosphere. Photogeoclimatology primarily depends on this energy and is modulated by the latitude, soil relief, seasons and nycthemeral cycle. [less ▲]

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See detailSources artificielles de lumière.
Pierard, Claudine ULg; Paquet, Philippe ULg; Henry, Frédérique ULg et al

in Revue Médicale de Liège (2005), 60 Suppl 1

The artificial light sources are numerous. They emit a more or less delimited spectrum of wavelengths. Ultraviolet light dosimetry allows to control the amount of delivered energy.

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See detailPhotobiologie moléculaire.
Nikkels, Arjen ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Photochemical reactions are numerous in the skin. They generate reactive oxygen species and other biochemical alterations as well. According to their nature, the molecular components of the skin which ... [more ▼]

Photochemical reactions are numerous in the skin. They generate reactive oxygen species and other biochemical alterations as well. According to their nature, the molecular components of the skin which have been altered by these mechanisms can be repaired with various degrees of efficacy. [less ▲]

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See detailPhotophysique et couleur cutanée.
Pierard, Gérald ULg; Uhoda, Emmanuelle ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

The optical properties of skin and of chromophores orientate and absorbe light. The resulting skin colour can be assessed by visual inspection or by objective methods. Spectrophotometry, tristimulus ... [more ▼]

The optical properties of skin and of chromophores orientate and absorbe light. The resulting skin colour can be assessed by visual inspection or by objective methods. Spectrophotometry, tristimulus colorimetry and computerized image analysis are well codified methods. Epidermal melanisation is detected with great sensitivity under ultraviolet light illumination. [less ▲]

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See detailLa peau et ses nuances ethniques.
Flagothier, Caroline ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Ethnic (racial) differences exist for a series of physiological skin characteristics. Colour is responsible for typology and resistance to ultraviolet irradiations. Other differences have also been ... [more ▼]

Ethnic (racial) differences exist for a series of physiological skin characteristics. Colour is responsible for typology and resistance to ultraviolet irradiations. Other differences have also been reported for the transepidermal water loss, the size and cohesion of corneocytes, the vascular reactiviy, the biomechanical properties, the pH, the lipidic content, the superficial microflora and the structure of mast cell granules. [less ▲]

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See detailRéponses physiologiques à l'exposition solaire.
Letawe, Caroline; Claessens, Nadine; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

The physiological responses to ultraviolet light exposure can be immediate, early or delayed. Typical examples include actinic erythema, suntan, the telogen actinic effluvium, ephelids, lentigines, some ... [more ▼]

The physiological responses to ultraviolet light exposure can be immediate, early or delayed. Typical examples include actinic erythema, suntan, the telogen actinic effluvium, ephelids, lentigines, some melanocytic naevi, and actinic wrinkles. [less ▲]

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See detailGenophotodermatoses.
Arrese Estrada, Jorge ULg; Henry, Frédérique ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Genophotodermatoses can result from a defect in melanin synthesis, a defect in DNA repair or a congenital photosensibility.

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See detailLucites par photosensibilisation.
Claessens, Nadine; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

There exists a series of photodermatoses due to phototoxic or photoallergic reactions. Anamnestic and clinical clues supplemented by dermatopathological examination and photobiological tests are key ... [more ▼]

There exists a series of photodermatoses due to phototoxic or photoallergic reactions. Anamnestic and clinical clues supplemented by dermatopathological examination and photobiological tests are key features for reaching the correct diagnosis and the adequate choice of therapy. [less ▲]

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See detailPhotoprotection cutanée.
Henry, Frédérique ULg; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Physical or chemical photoprotection is mandatory in order to prevent some of the negative effects of ultraviolet light exposure.

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See detailTraitements par la lumière.
Pierard, Claudine ULg; Henry, Frédérique ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60 Suppl 1

Some cutaneous disorders can be treated by light under specific modalities. Balneotherapy, UVA phototherapy, PUVAtherapy, TL 01 phototherapy, extracorporeal photochemotherapy and external photodynamic ... [more ▼]

Some cutaneous disorders can be treated by light under specific modalities. Balneotherapy, UVA phototherapy, PUVAtherapy, TL 01 phototherapy, extracorporeal photochemotherapy and external photodynamic therapy are representatives of this group of treatment modalities. [less ▲]

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See detailTraitements par lasers et lumière pulsée.
Paquet, Philippe ULg; Pierard, Claudine ULg; Henry, Frédérique ULg et al

in Revue Médicale de Liège (2005), 60 Suppl 1

Numerous types of lasers can exert different and specific effects in the skin. Devices delivering high intensity of pulsed light can exert similar effect.

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See detailReconnaître et traiter le psoriasis du cuir chevelu.
Pierard, Gérald ULg

in Tempo Médical (2005), 266

Le psoriasis est une dermatose fréquente dans la population belge, et le cuir chevelu en représente un bastion qui a la réputation de résister à de nombreux traitements. Cette localisation céphalique peut ... [more ▼]

Le psoriasis est une dermatose fréquente dans la population belge, et le cuir chevelu en représente un bastion qui a la réputation de résister à de nombreux traitements. Cette localisation céphalique peut ainsi être isolée ou accompagnée de l’atteinte d’autres sites corporels. Le psoriasis du cuir chevelu a une présentation érythémato-squameuse de sévérité variable selon les patients et le moment où ils sont observés. [less ▲]

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See detailLe cas clinique du mois. Kératoses et carcinomes arsenicaux.
Fumal, I.; Pierard, Claudine ULg; Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60(4), 217-21

We report the case of a 70-year old man who presented the classical cutaneous signs of chronic arsenicism : palmo-plantar keratoses and lesions of Bowen's disease. Within a few months, the patient ... [more ▼]

We report the case of a 70-year old man who presented the classical cutaneous signs of chronic arsenicism : palmo-plantar keratoses and lesions of Bowen's disease. Within a few months, the patient developed multiple large superficial basal cell carcinomas on the trunk and several invasive squamous cell carcinomas. A pulmonary cancer with cerebral metastases was also identified. The complications of chronic arsenicism are nowadays rarely encountered. The cutaneous changes should be recongized because they allow to reveal the etiology of some internal lesions. Indeed, the notion of past arsenicism is often missing in the patient records. The recognition of the cutaneous warning signs allows to focus on the overall cancer risk of these patients. [less ▲]

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See detailDu rififi dans le monde de l'onychomycose.
Pierard, Gérald ULg

in Revue Médicale de Liège (2005), 60(4), 242-6

Recently, onychomycoses raised some interest from groups whose business is communication to the public. The combination of commercial interest, dogmatism and disinformation appears to have found there a ... [more ▼]

Recently, onychomycoses raised some interest from groups whose business is communication to the public. The combination of commercial interest, dogmatism and disinformation appears to have found there a potentially damaging field of action. This review is an attempt to shed some light on this topic using objective and qualified medical information. [less ▲]

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See detailLa peau dite sèche du patient diabétique.
Uhoda, Emmanuelle ULg; Debatisse, B.; Paquet, Philippe ULg et al

in Revue Médicale de Liège (2005), 60(5-6), 560-3

Rough skin or xerosis, known by the laity as dry skin, results from a defect in the stratum corneum desquamation which normally remains imperceptible. This condition is negatively influenced by winter ... [more ▼]

Rough skin or xerosis, known by the laity as dry skin, results from a defect in the stratum corneum desquamation which normally remains imperceptible. This condition is negatively influenced by winter climatic conditions. Atopic dermatitis and trophic changes related to post-menopause, ageing, diabetes mellitus, as well as other endrocrine and metabolic disturbances are also involved in this process. Xerosis can be improved at various degrees by emollients, humectants, hydrating agents and squamolytic agents. [less ▲]

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