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 detailGold(I) complexes bearing mixed-donor ligands derived from N-heterocyclic carbenes
Chia, Eugene Y; Naeem, Saira; Delaude, Lionel ULg et al

in Dalton Transactions (2011), 40(25), 6645-6658

The new 2-phenylthiocarbamoyl-1,3-dimesitylimidazolium inner salt (IMes•CSNPh) reacts with [AuCl(L)] in the presence of NH4PF6 to yield [(L)Au(SCNPh•IMes)]+ (L = PMe3, PPh3, PCy3, CNBut). The carbene ... [more ▼]

The new 2-phenylthiocarbamoyl-1,3-dimesitylimidazolium inner salt (IMes•CSNPh) reacts with [AuCl(L)] in the presence of NH4PF6 to yield [(L)Au(SCNPh•IMes)]+ (L = PMe3, PPh3, PCy3, CNBut). The carbene-containing precursor [(IDip)AuCl] reacts with IMes•CSNPh under the same conditions to afford the complex [(IDip)Au(SCNPh•IMes)] + (IDip = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene). Treatment of the diphosphine complex [(dppm)(AuCl)2] with one equivalent of IMes•CSNPh yields the digold metallacycle, [(dppm)Au 2(SCNPh•IMes)]2+, while reaction of [L 2(AuCl)2] with two equivalents of IMes•CSNPh results in [(L2){Au(SCNPh•IMes)}2]2+ (L2 = dppb, dppf, or dppa; dppb = 1,4-bis(diphenylphosphino)butane, dppf = 1,1'-bis(diphenylphosphino)ferrocene, dppa = 1,4- bis(diphenylphosphino)acetylene). The homoleptic complex [Au(SCNPh•IMes) 2]+ is formed on reaction of [AuCl(tht)] (tht = tetrahydrothiophene) with two equivalents of the imidazolium-2- phenylthiocarbamoyl ligand. This product reacts with AgOTf to yield the mixed metal compound [AuAg(SCNPh•IMes)2]2+. Over time, the unusual trimetallic complex [Au(AgOTf)2(SCNPh•IMes) 2]+ is formed. The sulfur-oxygen mixed-donor ligands IMes•COS and SIMes•COS (SIMes = 1,3-bis(2,4,6-trimethylphenyl) imidazolin-2-ylidene) were used to prepare [(L)Au(SOC•IMes)]+ and [(L)Au(SOC•SIMes)]+ from [(L)AuCl] (L = PPh3, CNtBu). The bimetallic examples [(dppf){Au(SOC•IMes)} 2]2+ and [(dppf){Au(SOC•SIMes)}2] 2+ were synthesized from the reaction of [(dppf)(AuCl)2] with the appropriate ligand. Reaction of [(tht)AuCl] with one equivalent of IMes•COS or SIMes•COS yields [Au(SOC•IMes) 2]+ and [Au(SOC•SIMes)2]+, respectively. The compounds [(Ph3P)Au(SCNPh•IMes)]PF 6, [(Cy3P)Au(SCNPh•IMes)]PF6 and [Au(AgOTf)2(SCNPh•IMes)2]OTf were characterized crystallographically. [less ▲]

Detailed reference viewed: 23 (5 ULg)
Full Text
Peer Reviewed
See detailThe gold-ammonia bonding patterns of neutral and charged complexes Au m 0+/-1-(NH3)n. I. Bonding and charge alternation.
Kryachko, Eugène ULg; Remacle, Françoise ULg

in Journal of Chemical Physics (2007), 127(19), 194305

The gold-ammonia bonding patterns of the complexes which are formed between the ammonia clusters (NH/sub 3/)/sub 1<or=n<or=3/ and gold clusters of different sizes that range from one gold atom to the tri ... [more ▼]

The gold-ammonia bonding patterns of the complexes which are formed between the ammonia clusters (NH/sub 3/)/sub 1<or=n<or=3/ and gold clusters of different sizes that range from one gold atom to the tri-, tetra-, and 20-nanogold clusters are governed by two basic and fundamentally different ingredients: the anchoring Au-N bond and the nonconventional N-H ... Au hydrogen bond. The latter resembles, by all features, a conventional hydrogen bond and is formed between a typical conventional proton donor N-H group and the gold cluster that behaves as a nonconventional proton acceptor. We provide strong computational evidence that the gold-ammonia bonding patterns exhibit distinct characteristics as the Z charge state of the gold cluster varies within Z=0,+/-1. The analysis of these bonding patterns and their effects on the N-H ... N H-bonded ammonia clusters are the subject of this paper. [less ▲]

Detailed reference viewed: 25 (3 ULg)
Full Text
Peer Reviewed
See detailGold-loaded carbon nanoparticles from poly(vinyl alcohol)-b-poly(acrylonitrile) non-shell-cross-linked micelles
Bryaskova, Rayna; Willet, Nicolas ULg; Duwez, Anne-Sophie ULg et al

in Chemistry : An Asian Journal (2009), 4(8), 1338-1345

Herein we show that a new amphiphilic poly(vinyl alcohol)-b-poly(acrylonitrile) block copolymer dispersed in water can be easily loaded with gold nanoparticles by addition of chlorauric acid followed by ... [more ▼]

Herein we show that a new amphiphilic poly(vinyl alcohol)-b-poly(acrylonitrile) block copolymer dispersed in water can be easily loaded with gold nanoparticles by addition of chlorauric acid followed by reduction by sodium borohydride. After deposition of the so-loaded micelles onto a silicon wafer, followed by an appropriate thermal treatment, the poly(acrylonitrile) core of the micelles is carbonized, while the poly(vinyl alcohol) shell is completely decomposed and volatilized, leading to gold encapsulated in carbon nanoparticles. The morphology of the micelles is maintained during thermal treatment without requiring shell-cross-linking of the micelles prior to pyrolysis. [less ▲]

Detailed reference viewed: 111 (36 ULg)
Full Text
Peer Reviewed
See detailGolden shares, droit des sociétés et marché intérieur
Thirion, Nicolas ULg

in Cahiers de Droit Européen (2003)

Detailed reference viewed: 76 (8 ULg)
Full Text
Peer Reviewed
See detailGolden-headed lion tamarin research in the 21st century: Recent advances and potential areas of future research
Raghunathan, Poornima ULg

in Neotropical Primates (2011), 18(2), 72-76

On 7 and 8 December 2011, students, researchers, and conservationists with a vested interest in golden-headed lion tamarins (Leontopithecus chrysomelas; GHLTs) gathered at the State University of Santa ... [more ▼]

On 7 and 8 December 2011, students, researchers, and conservationists with a vested interest in golden-headed lion tamarins (Leontopithecus chrysomelas; GHLTs) gathered at the State University of Santa Cruz (UESC; Ilhéus, Bahia, Brazil) for the symposium `Golden-Headed Lion Tamarin Research in the 21st Century: Recent Advances and Potential Areas of Future Research´ with the aim of sharing recent work and discussing potential future avenues for research. Within the last 5 years, several doctoral dissertations and masters theses were completed that focused on the biology, ecology, and/or conservation of GHLTs in addition to the ongoing work of established scientists who have devoted their professional lives to the study of this species and the Atlantic Forest. However, language barriers and the fact that many members of the GHLT community are based at institutions throughout the world have complicated widespread access to these results and collaborations among researchers. The primary goals of this symposium were to (1) promote the exchange of existing information, (2) contribute towards a better synchronization of research efforts, and (3) identify important steps for more efficient/ collaborative conservation efforts for GHLTs and their habitat. This symposium brought together 30 participants from 12 institutions in Brazil, Belgium and the USA and allowed for the dissemination of information to the global GHLT community, compilation of recent advances in research, and identification of gaps in knowledge of GHLT biology, ecology and conservation, which ultimately fostered discussions on how attendees could collaborate to fill knowledge gaps. [less ▲]

Detailed reference viewed: 10 (1 ULg)
Full Text
Peer Reviewed
See detail'Gomorra' e l'estetica documentale nel nuovo millennio
Ricciardi, Stefania ULg; Boucharenc, Myriam; Martens, David et al

in Interférences Littéraires = Literaire Interferenties (2011), (7), 167-186

Turning truth into vision, Gomorra lays the foundations for a new way to narrate reality, a way which is only in part inspired by the poetics of the nonfiction novel. Journalistic inquiry becomes ... [more ▼]

Turning truth into vision, Gomorra lays the foundations for a new way to narrate reality, a way which is only in part inspired by the poetics of the nonfiction novel. Journalistic inquiry becomes literature by focusing on the power of the word and on the “self” of the author, an eyewitness in search of an element of attraction in order to give strength to the story and to ratify a truth that, otherwise, would be lost in the monotony of crime news. This method confirms Agamben’s idea, according to which the ethical result of testimony does not lie in the conformity between words and events, but in the guarantee that those words and those events will not be forgotten. Gomorra outlines a documentary aesthetics which, thanks to the expositive method of the novelist, turns statistics, objective data, personal experiences of everyday life into a story that combines literature, anthropology and sociology. In this way, Saviano’s self is closely related to the character around whom Marc Augé builds his ethnofiction: a witness and, at best, a symbol. [less ▲]

Detailed reference viewed: 75 (3 ULg)
Full Text
Peer Reviewed
See detailGonadal and thyroid hormones in the barbel (Barbus barbus) during and outside short reproductive cycles
Poncin, Pascal ULg; Kuhn, E. R.; Vandorpe, G. et al

in Folia Zoologica (1998), 47

Sex steroids with thyroid hormones were studied during reproduction in the European barbel Barbus barbus L., a new species for European aquaculture. In female barbel, the period between two successive ... [more ▼]

Sex steroids with thyroid hormones were studied during reproduction in the European barbel Barbus barbus L., a new species for European aquaculture. In female barbel, the period between two successive ovulations (every 12-18 days) was characterized by high estradiol-17 beta (E-2) levels (>300 pg.ml(-1)) and a sinusoidal variation of these levels. Outside the reproductive periods, the E-2 plasma concentration was significantly lower (100 pg.ml(-1)) and invariation. The spermiating males showed significantly higher testosterone (T) plasma values than non-spermiating ones. The opposite was noticed for the plasma thyroxine (T-4) concentrations: low values in males and females during reproduction, high values outside reproductive periods. Spermiating males had a higher triiodothyronine (T-3) plasma concentration compared to non-spermiating ones, whereas no significant difference is seen for the females. [less ▲]

Detailed reference viewed: 60 (12 ULg)
Full Text
Peer Reviewed
See detailGonadal cryopreservation in the young patient with gynaecological malignancy.
Donnez, Jacques; GODIN, Pierre-Arnaud ULg; Qu, Jianping et al

in Current Opinion in Obstetrics & Gynecology (2000), 12(1), 1-9

For patients who are planning to have chemotherapy, radiotherapy or to undergo bilateral oophorectomy, the loss of ovarian function will result in premature ovarian menopause and loss of fertility. Embryo ... [more ▼]

For patients who are planning to have chemotherapy, radiotherapy or to undergo bilateral oophorectomy, the loss of ovarian function will result in premature ovarian menopause and loss of fertility. Embryo preservation is not an option for single women or married women because delaying treatment for at least 2 months of in-vitro fertilization cycles is inappropriate and may be life-threatening. This study reports on the indications for ovarian tissue cryobanking and the state of the art of this method in preserving fertility in women with iatrogenic premature menopause. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailGonadal pathology and tumor risk in relation to clinical characteristics in patients with 45,X/46,XY mosaicism
Cools, M.; Pleskacova, J.; Stoop, H. et al

in Journal of Clinical Endocrinology and Metabolism (2011), 96(7), 1171-1180

Detailed reference viewed: 16 (2 ULg)
Peer Reviewed
See detailGonadal-Independent Developmental Changes in Activation of N-Methyl-D-Aspartate Receptors Involved in Gonadotropin-Releasing Hormone Secretion
Bourguignon, Jean-Pierre ULg; Gerard, Arlette ULg; Alvarez Gonzalez, Maria-Luz ULg et al

in Neuroendocrinology (1992), 55(6), 634-41

Using hypothalamic explants of male rats, we have shown that the N-methyl-D-aspartate (NMDA) receptors involved in a stimulatory control of gonadotropin-releasing hormone (GnRH) secretion were transiently ... [more ▼]

Using hypothalamic explants of male rats, we have shown that the N-methyl-D-aspartate (NMDA) receptors involved in a stimulatory control of gonadotropin-releasing hormone (GnRH) secretion were transiently activated at 25 days around the time of onset of puberty. This was evidenced by studying the dose-related inhibition of veratridine-induced GnRH secretion by MK-801, a use dependent antagonist of NMDA receptors. An increase in sensitivity of GnRH secretion to the inhibitory effect of MK-801 was used as a marker of increased activation of NMDA receptors involved in stimulation of GnRH secretion. Here, we report on data obtained in intact and castrated rats at different ages. The aim was to determine whether the absence of gonads would affect the developmental changes in activation of NMDA receptors that we described recently. In pubertal (50-day-old) rats, orchidectomy resulted in an activation of NMDA receptors which was nonsignificant after 4 days but significant after 13 days. In prepubertal rats orchidectomized at 5 or 10 days and studied 10 days later, the NMDA receptors involved in GnRH secretion were also more activated than in intact animals. Using explants of intact and castrated animals, a similar increase in activation of NMDA receptors was observed between 15 and 25 days of age, a period preceding onset of puberty. Subsequently, between 25 and 50 days, a reduction in NMDA receptor activation was seen. This decrease was observed in intact rats showing normal sexual development and in castrated rats as well.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

Detailed reference viewed: 11 (1 ULg)
See detailLes gonadotrophinomes
Beckers, Albert ULg

Scientific conference (1988, May)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailGonadotropin Releasing Hormone Inhibitory Autofeedback by Subproducts Antagonist at N-Methyl-D-Aspartate Receptors: A Model of Autocrine Regulation of Peptide Secretion
Bourguignon, Jean-Pierre ULg; Alvarez Gonzalez, Maria-Luz ULg; Gerard, Arlette ULg et al

in Endocrinology (1994), 134(3), 1589-92

The secretion of Gonadotropin-releasing Hormone (GnRH) involves activation of N-methyl-D-aspartate (NMDA) receptors. Here, we show that pulsatile GnRH secretion from hypothalamic explants is suppressed by ... [more ▼]

The secretion of Gonadotropin-releasing Hormone (GnRH) involves activation of N-methyl-D-aspartate (NMDA) receptors. Here, we show that pulsatile GnRH secretion from hypothalamic explants is suppressed by 1-5GnRH, an endogenous breakdown product of GnRH, while 2-10GnRH has no effect. GnRH secretion evoked by NMDA is selectively inhibited by 1-5GnRH and this effect is similar to that of AP-5, a competitive antagonist at NMDA receptors. In addition, 1-5GnRH accounts for a dose-related inhibition of tritiated glutamate binding to hypothalamic membrane preparations. Using GnRH secretion as a model of NMDA-receptor controlled system, the effect of different peptides has been studied. Growth Hormone Releasing Factor (GRF), Insulin-like Growth Factor-I (IGF-I) and Proinsulin result in inhibition of GnRH secretion. Bioactive subproducts of those peptides (1-29GRF, 4-701GF-I and insulin) do not show any effect, suggesting that their classical receptors are not involved. In contrast, GnRH secretion is inhibited by other subproducts (1-37GRF, 1-31GF-I and C-peptide) all terminating in a glutamate residue. These subproducts selectively suppress the NMDA-evoked secretion of GnRH. Protease inhibitors prevent the inhibitory effects of IGF-I on GnRH secretion. This, breakdown products of different peptide hormones are possible endogenous antagonists at NMDA receptors. This effect could account for an autocrine or paracrine limitation of NMDA-receptor-mediated secretion of peptides. [less ▲]

Detailed reference viewed: 25 (4 ULg)
See detailGonadotropin secreting tumors
Beckers, Albert ULg; Ciccarelli, A.; Valdes Socin, Hernan Gonzalo ULg et al

in The Encyclopedia of Endocrinology and Endocrine Diseases (2004)

Detailed reference viewed: 27 (1 ULg)
Peer Reviewed
See detailGonadotropin secretion in the bovine : localization of LH and FSH in pituitaries by electron microscopy.
Bastings, E.; Beckers, Albert ULg; Reznik, M. et al

in Journal of Endocrinological Investigation (1990)

Detailed reference viewed: 4 (0 ULg)
See detailGonarthrose: intérêt de l'évaluation isocinétique
Croisier, Jean-Louis ULg; Henrotin, Yves ULg; Dumont, R. et al

in KINE 2000 (1998, December), 9(98/5), 90

Detailed reference viewed: 41 (1 ULg)
Full Text
See detailGoncourt des lycéens et roman adressé à la jeunesse: quels points communs ?
Delbrassine, Daniel ULg

in Lecture Jeune (2011), 137

Comparaison thématique et formelle entre les 6 derniers romans primés au Goncourt des lycéens français et le roman adressé aux adolescents

Detailed reference viewed: 19 (0 ULg)
Full Text
See detailGood interpretation of a biological result: generality and specificity to Nephrology
CAVALIER, Etienne ULg

in DELANAYE, Pierre (Ed.) Clinical Chemistry and Nephrology: the essential link (2012)

Detailed reference viewed: 8 (1 ULg)
Full Text
See detailGood Laboratory Practice: How to avoid pitfalls of quantitative analysis
Ziemons, Eric ULg; Hubert, Philippe ULg

Learning material (2009)

The objective of a quantitative analytical method is to be able to quantify accurately as possible each unknown that the laboratory will have to determine according to the analytical procedure. The ... [more ▼]

The objective of a quantitative analytical method is to be able to quantify accurately as possible each unknown that the laboratory will have to determine according to the analytical procedure. The analytical procedure refers to the way of performing the analysis. It should describe in detail the steps necessary to perform each analytical test. This may included but is not limited to samples, reference standards and reagents preparation: weighing, quantitative transfer and dispensing an aliquot. The choice of the laboratory material and also the way to use it have a dramatic influence on the accuracy of an analytical method. [less ▲]

Detailed reference viewed: 38 (1 ULg)
See detailThe Good, The Bad and the Ugly: integrating multiple frames in Flanders and Wallonia air policies by using the Delphi method
Fallon, Catherine ULg; Hendrickx, Kim ULg; Vanhaeren, Stéphanie ULg

Conference (2010, June 21)

A new European frame has developed stepwise to manage the health effect of air pollution from particulate matter (PM 10 and PM 2,5), backed by an international body of scientific knowledge and OMS reports ... [more ▼]

A new European frame has developed stepwise to manage the health effect of air pollution from particulate matter (PM 10 and PM 2,5), backed by an international body of scientific knowledge and OMS reports. The European Union CAFE Directive (2008) leaves the Member States with an important margin to translate the air quality objectives into action plans. In Belgium this policy is entirely left to the regions which developed different frames and decisional spaces. Belgium is a pollution 'hot spot' because of the variety of pollution sources it is faced with (traffic density, industrial density, transboundary pollution). As such, it provides an interesting ground for comparative research. We conducted a comparative research in the two largest Belgian regions and identified two decisional spaces that differ on a political, administrative and technical levels. Earlier research on risk management has pointed out that transversality, openness, and interdisciplinarity positively affect the quality of decision making under uncertainty. In that perspective, can specific tools help foster a transversal and integrative approach in air policy? In the Scope-project, a web-based tool using the Delphi method has been tested in the two regions. This allowed to put forward some hypotheses concerning the potential for transversality, interdisciplinary and openness in these different structures and decisional spaces. The results of the experiment and its potential for generalisation will be discussed at length. [less ▲]

Detailed reference viewed: 67 (18 ULg)
Full Text
See detailGoodness of fit testing and data set stability with respect to misclassification
Magis, David ULg

Conference (2004, October)

Detailed reference viewed: 7 (1 ULg)