Search results for: A. NICOLAŸ

Items from 1 to 20 out of 23 results

article

Study of curtaining effect reduction methods in Inconel 718 using a plasma focused ion beam

F. Jaime, S. Desbief, J. Silvent, G. Goupil, more

Journal of Microscopy > 295 > 3 > 287 - 299

The curtaining effect is a common challenge in focused ion beam (FIB) surface preparation. This study investigates methods to reduce this effect during plasma FIB milling of Inconel 718 (nickel‐based superalloy). Platinum deposition, silicon mask and XeF₂ gas injection were explored as potential solutions. These methods were evaluated for two ion beam current conditions; a high ion beam intensity...

article

Discrimination of dynamically and post‐dynamically recrystallized grains based on EBSD data: application to Inconel 718

A. NICOLAŸ, J.M. FRANCHET, J. CORMIER, H. MANSOUR, more

Journal of Microscopy > 273 > 2 > 135 - 147

The importance of angular resolution in EBSD analyses is discussed based on an Inconel 718 sample containing several populations of recrystallized grains, with subtle differences in dislocation contents. Classical EBSD analyses (with angular resolution in the range of 0.5–1°) do not allow for distinguishing recrystallized grains grown dynamically or post‐dynamically. The angular resolution of EBSD...

article

Growth hormone (GH) and triglyceride-rich lipoprotein (TRL) metabolism: Effect of one month of discontinued growth hormone treatment in growth hormone deficient patients

A. Calabrese, A. Nicolay, E. Wolff, J. Dupont, more

Atherosclerosis > 2018 > 275 > C

article

Amélioration du profil lipidique après chirurgie bariatrique en relation avec une diminution des taux d’apolipoprotéine-CIII plasmatiques : redistribution entre lipoprotéines HDL et non-HDL

M. Maraninchi, N. Padilla, J. Dupont-Roussel, B. Berthet, more

Nutrition Clinique et M�tabolisme > 2016 > 30 > 3 > 259-260

L’apoprotéine (apo)-CIII, marqueur de risque cardiovasculaire, est augmentée dans l’obésité. La chirurgie bariatrique est associée à une diminution de la morbimortalité cardiovasculaire en partie grâce à une amélioration du profil lipidique. Nous avons évalué l’évolution des concentrations en apo-CIII avant et après chirurgie bariatrique en lien avec les profils lipidiques.Évaluation des profils lipidiques...

article

Opencast mines in South Brandenburg (Germany)—archives of Late Quaternary landscape development and human-induced land use changes

T. Raab, A. Raab, A. Nicolay, M. Takla, more

Archaeological and Anthropological Sciences > 2016 > 8 > 3 > 453-466

This study outlines the opportunities for geoarchaeological research in active opencast lignite mines in southern Brandenburg (Germany). Studies on extensive outcrops that address both archaeology and soil geomorphology, combined with a geographical information system (GIS) approach, provide unique insights into human-induced environmental changes in Lower Lusatia and generally improve our understanding...

article

Pre-industrial charcoal production in Lower Lusatia (Brandenburg, Germany): Detection and evaluation of a large charcoal-burning field by combining archaeological studies, GIS-based analyses of shaded-relief maps and dendrochronological age determination

A. Raab, M. Takla, T. Raab, A. Nicolay, more

Quaternary International > 2015 > 367 > Complete > 111-122

In pre-industrial times, charcoal burning was a common source of energy across Europe. Charcoal production and its related consequences for the upland environment are well known due to historical and palaeoenvironmental research. In recent years, awareness has grown regarding the use of woods in the lowlands for charcoal production. In the last 20 years, a large charcoal-burning field in Lower Lusatia...

article

Elaboration and characterization of a multifunctional silane/ZnO hybrid nanocomposite coating

A. Nicolay, A. Lanzutti, M. Poelman, B. Ruelle, more

Applied Surface Science > 2015 > 327 > C > 379-388

The present study aims at investigating the elaboration of a ZnO/sol–gel nanocomposite coating, which can provide a number of properties such as UV-absorption, mechanical and barrier effects, etc. depending on targeted applications. The sol–gel coating formulation is an inorganic–organic hybrid based on tetraethoxysilane (TEOS) and glycidyloxypropyltrimethoxysilane (GPTMS). In order to ensure good...

article

P124: Une combinaison de SNPs localisés dans des gènes impliqués dans le métabolisme du cholestérol explique, en partie, la variabilité d’absorption du cholestérol chez des hommes sains

E. Wolff, C. Desmarchelier, A. Nicolay, D. Lairon, more

Nutrition clinique et metabolisme > 2014 > 28 > Supplement 1 > S132-S133

L’hypercholestérolémie est un facteur de risque majeur dans le développement des maladies car-dio-vasculaires. Il existe une grande variabilité interindividuelle d’absorption du cholestérol (entre 30 % et 80 %) qui peut s’expliquer par des facteurs alimentaires et génétiques. Plusieurs polymorphismes mononucléotidiques (SNPs) ont déjà été associés à l’absorption du cholestérol, mais de manière individuelle...

article

Variation in cholesterol absorption in healthy male adults can be explained by a combination of SNPs in cholesterol metabolism genes

C. Desmarchelier, E. Wolff, M. Nowicki, A. Nicolay, more

Atherosclerosis > 2014 > 235 > 2 > e30

article

Disconnected runoff contributing areas: Evidence provided by ancient watershed management systems in arid north-eastern Marmarica (NW-Egypt)

T. Vetter, A.-K. Rieger, A. Nicolay

Geomorphology > 2014 > 212 > Complete > 41-57

This study presents the importance of disconnectivity in dryland area runoff demonstrated by manmade water harvesting structures dated to Greco-Roman times. Located on the coastal strip of some 20km width along the Mediterranean coast of modern northwestern Egypt covering the north-eastern part of the region known in antiquity as Marmarica, the area receives winterly rainfalls of up to 140mm. Further...

article

P071 Le statut de faible ou fort absorbeur de cholestérol est-il identique selon le marqueur plasmatique considéré ?

E. Wolff, A. Nicolay, D. Lairon, P. Borel

Nutrition clinique et metabolisme > 2013 > 27 > Supplement 1 > S92

article

Atomic Oxygen Functionalization of Vertically Aligned Carbon Nanotubes

C. Bittencourt, C. Navio, A. Nicolay, B. Ruelle, more

The Journal of Physical Chemistry C > 2011 > 115 > 42 > 20412 - 20418

article

P257 - Ghréline et adiponectine sont associées aux taux de HDL-cholestérol dans l’obésité indépendamment de la résistance à l’insuline et de l’inflammation

J.P. Nogueira, M. Maraninchi, S. Béliard, A.M. Lorec, more

Diabetes and Metabolism > 2011 > 37 > 1 Supplement 1 > A94

Des taux plasmatiques bas de HDL-cholestérol sont couramment retrouvés dans l’obésité et représentent un facteur de risque cardio-vasculaire indépendant.Le but de cette étude était d’examiner les associations entre les taux plasmatiques du HDL-cholestérol et les profils hormonaux plasmatiques (insuline, adiponectine, résistine, leptine et ghréline) dans des sous-groupes de patients atteints d’obésité...

article

Étude par CPG-SM d’allergènes volatils dans les fragrances et autres ingrédients destinés à la cosmétique

K. Fattarsi, C. Mikail, L. Abou, Y. Hadef, more

Phytothérapie > 2011 > 9 > 2 > 126-135

Résumé L’allergie cutanée se présente principalement comme le résultat de l’utilisation de produits domestiques et cosmétiques. Quelques fragrances, présentes dans ces produits, peuvent contenir des composés qui sont responsables de cette allergie. La Commission européenne a pris une directive limitant la teneur de 26 allergènes présents dans les produits cosmétiques. La technique de CPG-SM a été...

article

Development and validation of HPLC method for the determination of Cyclosporin A and its impurities in Neoral® capsules and its generic versions

F. Nunes Bonifacio, M. Giocanti, J.P. Reynier, B. Lacarelle, more

Journal of Pharmaceutical and Biomedical Analysis > 2009 > 49 > 2 > 540-546

Cyclosporin A (CyA) is a cornerstone immunosuppressant for the prophylaxis against allograft rejection after organ transplantation. The most widely prescribed CyA formulation is Neoral ^® soft gelatine capsules (Novartis Pharmaceuticals, Basel, Switzerland). After Novartis patent expiration, several generic formulations have been developed.In this paper, a simple and reliable HPLC method was...

article

Interactions and antioxidant stability of sesamol in dry-emulsions

J. S. Alencar, S. Pietri, M. Culcasi, C. Orneto, more

Journal of Thermal Analysis and Calorimetry > 2009 > 98 > 1 > 133-143

Dry emulsions prepared from saccharose (SAC), Labrafil^® M 1944 CS, sesamol (SEOH), and hydroxypropylmethylcellulose (HPMC) or sodium caseinate (SC) by grinding or dissolution, and different desiccation techniques (spray (SD)- or freeze (FD)-drying, or heating at 60 °C) were investigated to determine possible interactions between mixture components. The goal of this study was to determine the best...

article

Multivariate optimization of a derivatisation procedure for the simultaneous determination of nine anabolic steroids by gas chromatography coupled with mass spectrometry

Y. Hadef, J. Kaloustian, H. Portugal, A. Nicolay

Journal of Chromatography A > 2008 > 1190 > 1-2 > 278-285

The medical commission of the International Olympic Committee forbids the use of anabolic androgenic steroids to improve sporting performances. Nine anabolic steroids (androsterone (A), nandrolone, estradiol, testosterone propionate, nandrolone-17 propionate, dydrogesterone, testosterone, epitestosterone, boldenone) and α-cholestane as internal standard were studied by gas chromatography coupled with...

article

Thermal stability evaluation of doping compounds before GC-MS analysis by DSC

Y. Hadef, J. Kaloustian, A. Nicolay, H. Portugal

Journal of Thermal Analysis and Calorimetry > 2008 > 93 > 2 > 553-560

The Medical Commission of the International Olympic Committee forbids the use of anabolic androgenic steroids, β-agonists, stimulant and narcotic compounds to improve athletic performance. In this work, we evaluated the thermal stability of 17 compounds by the use of the DSC for their potential GC-MS analysis either under free form or under TMS derivative form. In DSC, esterified and unesterified...

article

DSC and physico-chemical properties of a substituted pyridoquinoline and its interaction study with excipients

D. Abbas, J. Kaloustian, C. Orneto, P. Piccerelle, more

Journal of Thermal Analysis and Calorimetry > 2008 > 93 > 2 > 353-360

The 4,6-bis[2′(diethylamino)ethoxy]2,8,10-trimethylpyrido[3,2-g]quinoline (BG 637) is one of the compound from the pyrido[3,2-g] quinolines family. This compound had in vitro activity against the resistant cells and can reverse the multidrug resistance developed during the chemotherapeutic treatments. To characterize BG 637, techniques such as differential scanning calorimetry (DSC), Fourier transform...

article

Effect of lithium on norepinephrine metabolic pathways

E. Sastre, A. Nicolay, B. Bruguerolle, H. Portugal

Life Sciences > 2005 > 77 > 7 > 758-767

We investigated lithium-induced changes in norepinephrine (NE) catabolism. NE and its major metabolites 3-methoxy-4-hydroxyphenylglycol (MHPG) and 3,4-dihydroxyphenyl glycol (DHPG), ions such as lithium (Li ⁺ ), magnesium (Mg ²⁺ ), and potassium (K ⁺ ) were measured in rat plasma and cerebral cortex using an HPLC method with electrochemical detection for amines. The results...

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INFONA - science communication portal

Search results for: A. NICOLAŸ

Study of curtaining effect reduction methods in Inconel 718 using a plasma focused ion beam

Discrimination of dynamically and post‐dynamically recrystallized grains based on EBSD data: application to Inconel 718

Growth hormone (GH) and triglyceride-rich lipoprotein (TRL) metabolism: Effect of one month of discontinued growth hormone treatment in growth hormone deficient patients

Amélioration du profil lipidique après chirurgie bariatrique en relation avec une diminution des taux d’apolipoprotéine-CIII plasmatiques : redistribution entre lipoprotéines HDL et non-HDL

Opencast mines in South Brandenburg (Germany)—archives of Late Quaternary landscape development and human-induced land use changes

Pre-industrial charcoal production in Lower Lusatia (Brandenburg, Germany): Detection and evaluation of a large charcoal-burning field by combining archaeological studies, GIS-based analyses of shaded-relief maps and dendrochronological age determination

Elaboration and characterization of a multifunctional silane/ZnO hybrid nanocomposite coating

P124: Une combinaison de SNPs localisés dans des gènes impliqués dans le métabolisme du cholestérol explique, en partie, la variabilité d’absorption du cholestérol chez des hommes sains

Variation in cholesterol absorption in healthy male adults can be explained by a combination of SNPs in cholesterol metabolism genes

Disconnected runoff contributing areas: Evidence provided by ancient watershed management systems in arid north-eastern Marmarica (NW-Egypt)

P071 Le statut de faible ou fort absorbeur de cholestérol est-il identique selon le marqueur plasmatique considéré ?

Atomic Oxygen Functionalization of Vertically Aligned Carbon Nanotubes

P257 - Ghréline et adiponectine sont associées aux taux de HDL-cholestérol dans l’obésité indépendamment de la résistance à l’insuline et de l’inflammation

Étude par CPG-SM d’allergènes volatils dans les fragrances et autres ingrédients destinés à la cosmétique

Development and validation of HPLC method for the determination of Cyclosporin A and its impurities in Neoral® capsules and its generic versions

Interactions and antioxidant stability of sesamol in dry-emulsions

Multivariate optimization of a derivatisation procedure for the simultaneous determination of nine anabolic steroids by gas chromatography coupled with mass spectrometry

Thermal stability evaluation of doping compounds before GC-MS analysis by DSC

DSC and physico-chemical properties of a substituted pyridoquinoline and its interaction study with excipients

Effect of lithium on norepinephrine metabolic pathways

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