Search results for "gold"

Supramolecular functionalization and concomitant enhancement in properties of Au25 clusters

2014

We present a versatile approach for tuning the surface functionality of an atomically precise 25 atom gold cluster using specific host-guest interactions between ?-cyclodextrin (CD) and the ligand anchored on the cluster. The supramolecular interaction between the Au25 cluster protected by 4-(t-butyl)benzyl mercaptan, labeled Au25SBB18, and CD yielding Au25SBB18�?�CDn (n = 1, 2, 3, and 4) has been probed experimentally using various spectroscopic techniques and was further analyzed by density functional theory calculations and molecular modeling. The viability of our method in modifying the properties of differently functionalized Au25 clusters is demonstrated. Besides modifying their optoe…

Gold nanoparticles and their influence for spectroscopic properties of YAGG:Cr-Ce-Pr

2018

Status of the Golden Eagle Aquila chrysaetos in Sicily

2017

In the present work, we review all the relevant information since the first Regional Atlas of breeding birds (Massa 1985), and we add field data on the species occurrence and site occupancy relative to the period January 2014-December 2016, in order to update the species’ status in Sicily.

Facio-auricle-vertebral spectrum (Goldenhar's syndrome): Clinical study of 10 pediatric patients

2002

Goldenhar's syndrome - also known as facio-auricolo-vertebral spectrum - is due to a developmental defect of cranio-facial and vertebral structures, and is interpreted as a disruption. Exogenous factors, such as gestational diabetes or ovopathies, have been involved in its aetiology. The pathogenesis of Goldenhar's syndrome seems to be vascular in most of cases, due to the interruption of blood supply to the branchial and vertebral areas during embryonic development. Ten cases of facio-auricolo-vertebral spectrum of different ages are described, in view of a better delineation of its phenotype. This report can contribute to a better knowledge of the phenotype of facio-auricolo-vertebral spe…

Construction of otherness in William Golding's Lord of the Flies

2013

Le follie nascoste del buon papà Goldoni. Su R. Alonge, Goldoni il libertino

2011

About Goldoni’s plays.

Direct dating of gold by radiogenic helium: Testing the method on gold from Diamantina, Minas Gerais, Brazil

2013

New analytical developments have made radiogenic helium ( 4 He) applicable to archeological gold artifacts for age determinations. Here we report the application of the U/Th– 4 He method to the direct dating of gold from the historically important gold deposit in Diamantina, Minas Gerais, Brazil. The U/Th– 4 He age of 515 ± 55 Ma for the Diamantina gold is corroborated by a new U/Pb age of 524 ± 16 Ma for rutile recovered from auriferous pockets. These ages tie the Diamantina gold mineralization to the Brasiliano orogenic event, in the context of the Gondwana amalgamation. Our results indicate that U/Th– 4 He dating of gold is possible, opening new perspectives for the dating of gold deposi…

Exploiting multivalent nanoparticles for the supramolecular functionalization of graphene with a nonplanar recognition motif.

2013

The supramolecular modification of planar graphene with the geometri- cally mismatched, curved 9,10-di(1,3-dithiole-2-ylidene)-9,10-dihydroanthracene (exTTF) molecule is demonstrated. The exTTF-graphene interaction is governed by p-p and CH-p interactions, with a negligible contribution from charge transfer. We amplified these weak forces through multivalent gold nanoparticles. Our re- sults show that planarity is not a prerequisite for recognition motifs for graphene.

Cluster Preface: Heterogeneous Catalysis

2016

International audience; Jean-Cyrille Hierso is full professor of Chemistry since 2009, heading the group of ‘Organometallic Chemistry and Catalysis’ at the Institute of Molecular Chemistry at the University of Bourgogne Franche-Comté (UBFC). He has interest in the fields of organometallic chemistry, ligand design, homo- and heterogeneous catalysis, chemical physics, and material sciences. In 2011 he was awarded the National Prize for Coordination Chemistry from the French Chemical Society (SCF), and at the end of 2012 he was elected a junior Member of the French Professors Academy ‘Institut Universitaire de France’ (IUF).Yasuhiro Uozumi is a full professor at the Institute for Molecular Sci…

Target Therapy in Platinum-Refractory/Resistant Ovarian Cancer: From Preclinical Findings to Current Clinical Practice

2013

Epithelial ovarian cancer (EOC) is the sixth most common malignancy in women. Ovarian tumors consist of several clinical and pathological entities that share an anatomic site. The gold standard treatment, both in front-line and in adjuvant setting, is represented by carboplatin/paclitaxel combination. Conversely, the second-line treatment is not well defined. The response to platinum is the major prognostic factor for survival. In this review we discuss the current views on platinum-refractory/resistant patient treatment only, which includes patients progressing or relapsing within 6 months from the last platinum-based course. Concerning this subgroup, the activity of several conventional d…