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See detailMasculin/féminin: une évidence? Questions de genres
Pieron, Julien ULg; Cravatte, Noémie ULg

Conference given outside the academic context (2012)

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See detailMasked and unmasked auditory thresholds in three species of birds, as measured by auditory brainstem responde
Noirot, Isabelle ULg; Brittan-Powell, Elisabeth; Dooling, Robert

in Journal of the Acoustical Society of America (2011)

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See detailMasked hypertension is associated with a high cardiovascular risk in hypertensive kidney transplant recipients
XHIGNESSE, Patricia ULg; Saint-Remy, Annie ULg; BONVOISIN, Catherine ULg et al

Poster (2013, June 16)

Objective: High blood pressure (BP) is a major risk factor for graft function in kidney transplant recipients (KTs) Our aim was to evaluate BP control in the office, but also in the ambulatory and home ... [more ▼]

Objective: High blood pressure (BP) is a major risk factor for graft function in kidney transplant recipients (KTs) Our aim was to evaluate BP control in the office, but also in the ambulatory and home settings, in stable KTs, ali treated for hypertension, and to characterize patients with masked hypertension (MHT). Design and Method: Three BP measurement techniques were used in 70 late KT patients, (mean age 56.5 years; 43 males): ambulatory BP monitoring (ABPM-Spacelab 90207) office (OBP) and home BP monitoring (HBPM)- (OMRON M6). Carotid­ femoral pulse wave velocity was measured (Sphygmocor) as weil as a calcification score (arteries) and the systolic ankle brachial index (ABI) as recommended. The period since transplantation was 6.9±6.6 years, the mean GFR was 65.6±24±ml/min, Body Mass Index was 25.8±4.7 kg/m2 and the number of antihypertensive drug was 2.1±1 pills/d. Results: Uncontrolled hypertension (HTN) remained frequent in our treated population, 46 % were still hypertensive in the office, 39% using ABPM and 43% with HBPM. The proportion of MHT was 22% whatever the out-of-clinic method used, with more males, more overweight (BMI between, 25-30). lnterestingly when compared with controlled KTs (i.e both OBP and Daytime ABP controlled or both OBP and HBP controlled), using either ABPM or Home BP, patients with MHT had significantly higher PWV, a higher aortic augmentation pressure (AP), a higher calcification score and a higher ABI. However we did not find any significant impact of graft survival, immunosuppressive drugs, smoking habits, diabetes, or alcohol use. Conclusion: A high percentage of uncontrolled HTN was noted by OBP, but also by ABPM and HBPM despite antihypertensive treatment. MHT was frequently observed in KTs. This particular HT subtype, either defined by OBP vs ABPM or by OBP vs HBP, was significantly associated with major markers of arterial stiffness. So, MHT is associated with a high cardiovascular (cv) risk and therefore has to be manage to reduce incidence of cv events and graft loss. [less ▲]

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See detailMasking of antigenic sites of fibronectin by glycosaminoglycans in ethanol-fixed embryonic tissue
Harrisson, F.; Van Hoof, J.; Vanroelen, Ch et al

in Histochemistry (1985), 82(2), 169-74

We studied the interaction between glycosaminoglycans (GAGs) and fibronectin in the basement membrane of the epiblast in the chicken blastoderm using testicular-hyaluronidase digestion of GAGs either on ... [more ▼]

We studied the interaction between glycosaminoglycans (GAGs) and fibronectin in the basement membrane of the epiblast in the chicken blastoderm using testicular-hyaluronidase digestion of GAGs either on fixed tissue sections or in vivo after microinjection of the enzyme preparation prior to immunostaining for fibronectin. In the choice of fixatives, special attention was paid to their preservation of GAGs. The controls included alcian-blue staining of serial sections to test the efficiency of the digestion, and incubations in the presence of protease inhibitors to abolish contaminating proteolytic activity in the commercial hyaluronidase preparations. The results indicate that fixation in solutions which preserve GAGs, i.e. ethanolic solutions or aqueous solutions containing cetylpyridinium chloride, allows the immunocytochemical demonstration of fibronectin in the basement membrane of the epiblast at the level of the endophyllic crescent, but masks this glycoprotein at the epithelial-mesenchymal interface. As shown by both approaches, this masking of immunoreactivity is reversible. Moreover, the in vivo clearance of GAGs before fixation shows that the masking at the epithelial-mesenchymal interface is not an experimental peculiarity due to the use of a particular technique, but is the consequence of an interaction between GAGs and fibronectin in that particular area of the basement membrane that is used by mesoblast cells as a substrate for migration. The observation that fibronectin may be masked by GAGs in ethanol-fixed tissue--a commonly used fixation method--may require the re-evaluation of some negative results mentioned in the literature. [less ▲]

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See detailMasking with Generalized Cloaking
Nicolet, A.; Zolla, F.; Geuzaine, Christophe ULg

in Invited lecture, 17th Conference on the Computation of Electromagnetic Fields, COMPUMAG 2009 (2009)

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See detailMASPIN: a formative evaluation tool supporting dialog among professionals and with families
Bednarek, Stéphanie; Vandoorne, Chantal ULg; Absil, Gaëtan ULg et al

in Spiteri, Ylenia; Galea, Elizabeth M. (Eds.) Psychology of Neglect (2012)

Background The consequences of child neglect are still too often played down. It is important to intervene at an early stage, approaching families at home through means adapted to community-level action ... [more ▼]

Background The consequences of child neglect are still too often played down. It is important to intervene at an early stage, approaching families at home through means adapted to community-level action. Interventions by health and social professionals face several hurdles: (1) the difficulty for front-line health and social professionals to make a diagnosis; (2) the difficulty of entering into a dialog with possible beneficiaries of the interventions owing to distrust; and (3) the difficulty of assessing the outcome of the interventions. In order to answer the need for the medium-term assessment of our intervention programs in the field of neglect and attachment disorders, our multidisciplinary team (psychologists, a general practitioner, an anthropologist and an educationalist) designed a tool aimed at supporting the observation of challenging indicators by parents and intervening parties in a given educational situation. Method The MASPIN tool (Method for Analysis of Situations and Project on Individual cases of Neglect) was designed on the basis of a review of existing literature on assessment tools for actions in the field concerning parental disorders, focusing on children up to three years old. Field professionals were involved in the design process in order to make sure that the tool matched their daily practice. Results The tool allows a six-fold assessment of: interactions between parents and child, parental skills, acknowledgement by parents of their difficulties or responsibilities, environmental factors, how the family experienced the intervention, and the intervening party’s experience. Discussion and conclusion The MASPIN tool could foster the development of a common knowledge and culture regarding intervention on neglect. Our limited use unveiled unexpected potential. It makes for interesting prospects in structuring the dialog between front-line professionals (medics, nurses and social workers) and experts. Moreover, it helps to ease the dialog between intervening parties and parents, clearly identifying existing parental skills and specific issues that might call for educational assistance. [less ▲]

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See detailLe masque et la menace. Constitutions et crises identitaires de la figure super héroïque contemporaine
Tomasovic, Dick ULg

in Forest, Claude (Ed.) Théorème 13. Du héros aux super héros. Mutations cinématographiques (2009)

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See detailThe Mass Distribution of sdB Stars Derived by Asteroseismology and Other Means: Implications for Stellar Evolution Theory
Van Grootel, Valérie ULg; Charpinet, Stéphane; Fontaine, Gilles et al

in Astronomical Society of the Pacific Conference Series (2014), 481

Understanding the formation of sdB stars is one of the remaining challenges of stellar evolution theory. Competing scenarios have been proposed to account for the existence of such evolved objects. They ... [more ▼]

Understanding the formation of sdB stars is one of the remaining challenges of stellar evolution theory. Competing scenarios have been proposed to account for the existence of such evolved objects. They give quite different mass distributions for resulting sdB stars. Detailed asteroseismic analyses, including mass estimates, of 15 pulsating hot B subdwarfs have been published in the past decade. Masses have also been reliably determined by light curve modeling and spectroscopy for 7 sdB components of eclipsing or reflection binaries. We present here the empirical mass distribution of sdB stars on the basis of these samples. Implications are also briefly discussed. [less ▲]

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See detailMASS LIMITS ON PARTICLES FROM PULSED SOURCES: HOW RELIABLE ARE THEY?
Cudell, Jean-René ULg; Halzen, F.; Hoyer, P.

in Phys. Rev. (1987), D36

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See detailMass Spectrometric determination of the Electronaffinities of Radicals.
Locht, Robert ULg; Momigny, Jacques

in Chemical Physics Letters (1970), 6(4), 273-276

By mass spectrometric study of the appearance of C2-, CH- and C2H- from CH4, C2H2, C2H4, C2H3X (X=F, Cl) the following electronaffinities have been determined: EA(CH)=(2.6+/-0.3) eV, EA(C2)=(3.3+/-0.2) eV ... [more ▼]

By mass spectrometric study of the appearance of C2-, CH- and C2H- from CH4, C2H2, C2H4, C2H3X (X=F, Cl) the following electronaffinities have been determined: EA(CH)=(2.6+/-0.3) eV, EA(C2)=(3.3+/-0.2) eV and EA(C2H)=(2.1+/-0.3) eV. Some evidence is brought to the existence of electronic excited states of these ions. An evaluation of these negative ions dissociation energy in their ground electronic state is given and is found to be of the order of magnitude of the corresponding isoelectronic molecular species dissociation energy. [less ▲]

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See detailA Mass Spectrometric Photoionization Study of CH3F. The CH2+, CH3+ and CH2F+ Ion Formation.
Locht, Robert ULg; Momigny, J.; Rühl, E. et al

in Chemical Physics (1987), 117

The decay of CH3F+ in the CH2+, CH3+ and CH2F+ dissociation channels has been investigated by photoionization mass spectrometry using synchrotron radiation in the energy range 10-25 eV. The ... [more ▼]

The decay of CH3F+ in the CH2+, CH3+ and CH2F+ dissociation channels has been investigated by photoionization mass spectrometry using synchrotron radiation in the energy range 10-25 eV. The photoabsorption curve of CH3F and the ionization efficiency curves of CH2+, CH3+ and CH2F+ as well as the kinetic energy-versus-appearance energy diagram for CH3+ were recorded. For the three fragment ions dissociative autoionization is a prominent formation process. Direct dissociative ionization is observed for the same ions through the decomposition of the CH3F+(A2A1+B2E) states at 16.1 eV as well as presumably of the C2A1 state at about 22.5 eV. [less ▲]

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See detailMass spectrometric sequencing of peptidic toxins : an overview
Quinton, Loïc ULg; Echterbille, Julien ULg; Pierre, Escoubas et al

in Editions de la SFET – SFET Editions (2010)

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See detailMass Spectrometric Study of Dissociative Attachment in Diatomic Molecules. II. NO and O2.
Locht, Robert ULg; Momigny, Jacques

in International Journal of Mass Spectrometry and Ion Physics (1970), 4

The DA processes of O- ions in NO and O2 are investigated using a 60° sector field mass spectrometer. In NO O- appears at (7.43+/-0.2) eV and the analysis of the DA curve indicates the probable existence ... [more ▼]

The DA processes of O- ions in NO and O2 are investigated using a 60° sector field mass spectrometer. In NO O- appears at (7.43+/-0.2) eV and the analysis of the DA curve indicates the probable existence of two other processes at 8.1 eV and 9.0 eV. In O2 only one process is observed at (3.45+/-0.3) eV. For both molecules an attempt is made to establish the shape of the potential energy curve of the electronic states of the transient negative molecular species involved. [less ▲]

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See detailMass Spectrometric Study of Dissociative Attachment in Diatomic Molecules:I. CO and H2
Locht, Robert ULg; Momigny, Jacques

in International Journal of Mass Spectrometry and Ion Physics (1969), 2

A study of the shape of the DA peaks leads to a general method for the determination of the threshold of a DA process. In order to test this method, the negative ions appearing in CO and H2 have been ... [more ▼]

A study of the shape of the DA peaks leads to a general method for the determination of the threshold of a DA process. In order to test this method, the negative ions appearing in CO and H2 have been investigated, using a sector field instrument. An attempt has been made to establish the relative positions of the potential energy curves (using the Morse function) for the electronic states involved in the processes observed [less ▲]

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See detailMass Spectrometric Study of Dissociative Electron Attachment in Carbon Dioxide.
Locht, Robert ULg; Momigny, Jacques

in Bulletin de la Société Royale des Sciences de Liège (1971), 40(9/10), 518-523

The DA efficiency curve of O- in CO2 has been studied mass spectrometricaly. Combining the use of the convolution of theoretical models and the deconvolution of the experimental curves, beside the ... [more ▼]

The DA efficiency curve of O- in CO2 has been studied mass spectrometricaly. Combining the use of the convolution of theoretical models and the deconvolution of the experimental curves, beside the previously reported DA peaks, some new DA processes have been determined at (6.0+/-0.3) eV and (13.3+/-0.4) eV for O- in CO2. A progressive conversion of electronic into vibrational excitation of diatomic radicals and into kinetic energy of the fragments is postulated as responsible for the threshold at (6.0+/-0.3) eV. [less ▲]

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See detailMass Spectrometric Study of Ion-Pair Processes in Diatomic Molecules: H2, CO, NO and O2.
Locht, Robert ULg; Momigny, Jacques

in International Journal of Mass Spectrometry and Ion Physics (1971), 7

The appearance of ion-pair processes has been studied in H2, CO, NO and O2. The different thresholds have been interpreted. Convolution and deconvolution techniques have been applied to the ionization ... [more ▼]

The appearance of ion-pair processes has been studied in H2, CO, NO and O2. The different thresholds have been interpreted. Convolution and deconvolution techniques have been applied to the ionization efficiency curves to determine (i) a method for the determination of the threshold energy and (ii) the kinetic energy distribution of the fragments. [less ▲]

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See detailMass Spectrometric Study of the Ionized C60: (Gamma-Cyclodextrin)2 Inclusion Complex by Collision Induced Dissociation
Greisch, Jean-François ULg; Kyritsoglou, S.; Leyh, Bernard ULg et al

in Journal of Mass Spectrometry [=JMS] (2008), 43(2), 242-50

The water soluble inclusion complex [C(60):(gamma-cyclodextrin)(2)] has been characterized using electrospray tandem mass spectrometry and collision induced dissociation. [C(60):(gamma-cyclodextrin)(2 ... [more ▼]

The water soluble inclusion complex [C(60):(gamma-cyclodextrin)(2)] has been characterized using electrospray tandem mass spectrometry and collision induced dissociation. [C(60):(gamma-cyclodextrin)(2)] ions were detected in the gas phase as doubly deprotonated, doubly protonated and doubly sodiated ions. The absence of monocharged complex ions following electronebulization is a likely consequence of the dimeric nature and structural symmetry of the inclusion complex. The collision induced dissociation of positive ions led exclusively to the observation of the protonated and sodiated cyclodextrin ions as well as their fragments. In negative ion mode the closed shell anion C(60)H(-) was the dominant fragment detected at low collision energies whereas at higher collision energies the signal corresponding to deprotonated cyclodextrin units becomes significant. Since C(60) (2-) has been reported to have a nonnegligible basicity compared to C(60) and C(60) (-), it is likely that the proton transfer involved in the formation of the C(60)H(-) anion occurs following transfer of the two electrons from the deprotonated gamma-cyclodextrins to the fullerene. Finally, the charge state of the inclusion complex ions is also shown to affect the interaction strengths between its subunits. The relative stabilities of the three ionic species studied in gas phase following electronebulization are as follows: [C(60):(gamma-cyclodextrin)(2) + 2H](2+) < [C(60):(gamma-cyclodextrin)(2)- 2H](2-) < [C(60):(gamma-cyclodextrin)(2) + 2Na](2+). [less ▲]

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See detailMass spectrometry and ion mobility spectrometry of G-quadruplexes. A study of solvent effects on dimer formation and structural transitions in the telomeric DNA sequence d(TAGGGTTAGGGT).
Ferreira, Ruben; Marchand, Adrien; Gabelica, Valérie ULg

in Methods (2012), 57(1), 56-63

We survey here state of the art mass spectrometry methodologies for investigating G-quadruplexes, and will illustrate them with a new study on a simple model system: the dimeric G-quadruplex of the 12-mer ... [more ▼]

We survey here state of the art mass spectrometry methodologies for investigating G-quadruplexes, and will illustrate them with a new study on a simple model system: the dimeric G-quadruplex of the 12-mer telomeric DNA sequence d(TAGGGTTAGGGT), which can adopt either a parallel or an antiparallel structure. We will discuss the solution conditions compatible with electrospray ionisation, the quantification of complexes using ESI-MS, the interpretation of ammonium ion preservation in the complexes in the gas phase, and the use of ion mobility spectrometry to resolve ambiguities regarding the strand stoichiometry, or separate and characterise different structural isomers. We also describe that adding electrospray-compatible organic co-solvents (methanol, ethanol, isopropanol or acetonitrile) to aqueous ammonium acetate increases the stability and rate of formation of dimeric G-quadruplexes, and causes structural transitions to parallel structures. Structural changes were probed by circular dichroism and ion mobility spectrometry, and the excellent correlation between the two techniques validates the use of ion mobility to investigate G-quadruplex folding. We also demonstrate that parallel G-quadruplex structures are easier to preserve in the gas phase than antiparallel structures. [less ▲]

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